@article{ubo_mods_00239653, author = {Krämer, Nicole and Lamia, Ivana and Siegert, Hanne and Wenda, Florian and Suchmann, Lovis Bero}, title = {Tricking into Trusting? The Influence of Social Cues of a Generative AI on Perceived Trust}, journal = {ACM Transactions on Interactive Intelligent Systems (TiiS)}, year = {2025}, publisher = {Association for Computing Machinery (ACM)}, address = {New York}, volume = {15}, number = {4}, keywords = {Anthropomorphism Inclination; Artificial Intelligence; GenAI; Media Equation; Perceived Similarity; Social Cues; Trust}, note = {kein CA}, issn = {2160-6455}, doi = {10.1145/3771844}, url = {https://doi.org/10.1145/3771844}, language = {en} } @phdthesis{ubo_mods_00239124, author = {Herrmanny, Katja}, title = {Kontextadaptive Unterstützung bei der Auswahl effektiver Aktivitätsziele}, year = {2025}, address = {Duisburg, Essen}, keywords = {Persuasive Technology; Decision Support System; Empfehlungssystem; Entscheidungsunterstützungssystem; Entscheidungsunterstützung; Körperliche Aktivität; Aktivitätsförderung; Zielsetzung; Human Factors; Activity Tracking; Rasch-Modell; Zielbindung; Selbstwirksamkeit; Selbstkontrollkapazität}, abstract = {Körperliche Aktivität ist ein essenzieller Bestandteil eines gesunden Lebensstils. Ihr gesundheit-licher Nutzen ist unbestritten. Sie wirkt präventiv und therapeutisch gegen eine Vielzahl häufiger Zivilisationskrankheiten. Trotz des hohen Nutzens ist nur ein geringer Teil der erwachsenen Be-völkerung in Deutschland ausreichend körperlich aktiv. Zur Förderung der körperlichen Aktivität werden unter anderem persuasive Technologien eingesetzt. Weit verbreitet sind diesbezüglich Activity-Tracking-Apps, die unterschiedliche persuasive Techniken beinhalten. Die Technik, die in der vorliegenden Arbeit im Vordergrund steht, ist die Zielsetzung. Zielsetzung ist eine nachweislich wirksame Technik, um Verhaltensänderungen zu unterstützen, sofern die gesetzten Ziele bestimmten Anforderungen entsprechen. Dazu zählt insbesondere, dass die Höhe des Ziels herausfordernd, jedoch erreichbar gewählt sein muss. Im hier betrachte-ten Anwendungskontext der Aktivitätsförderung mit Hilfe persuasiver Technologie hat sich je-doch gezeigt, dass es Menschen schwerfällt, solch ein passendes Ziel zu bestimmen. Diese Dissertation setzt sich mit der Fragestellung auseinander, ob und wie die Wahl eines pas-senden Ziels durch persuasive Technologie unterstützt werden kann. Dazu wird zum einen das Potenzial algorithmischer Unterstützung bei der Zielempfehlung untersucht und zum anderen das Potenzial der Einbeziehung der Nutzer:innen in den Empfehlungs- und Entscheidungspro-zess. Zu diesem Zweck werden zuerst Einflussfaktoren auf den Grad der Herausforderung und Erreich-barkeit eines Aktivitätsziels identifiziert. Neben interpersonellen Aspekten nehmen die momen-tane körperliche Konstitution, weitere unterstützende oder hinderliche äußere Umstände und psychologische Zustände Einfluss. Theoriegeleitet wird das Drei-Säulen-Modell der Zielsetzung entwickelt, das diese Faktoren in drei Säulen abbildet und ihren Einfluss auf das Aktivitätsverhal-ten beschreibt. Die Säulen sind die Körperliche Leistungsfähigkeit, der Volitionale Aufwand und die Volitionale Kapazität, wobei die Diskrepanz zwischen volitionalem Aufwand und volitionaler Kapazität, das Volitionale Delta, ein entscheidender Aspekt bei der Berechnung der Empfehlung ist. Die vergangene körperliche Aktivität der Person bildet die Basis, auf der die weiteren Berech-nungen aufbauen. Das Modell dient als Grundlage für die Entwicklung eines Empfehlungsalgo-rithmus zur Unterstützung bei der Zielsetzung. Kennzeichnend sind dabei die Abbildung lang-fristiger Veränderungen des Aktivitätsniveaus sowie kurzfristiger Schwankungen. Der mehrstu-fige Algorithmus besteht aus der Ermittlung einer Zielspanne, Zielbereichen und schließlich einer konkreten Empfehlung innerhalb eines dieser Bereiche. Unter anderem wird dabei Gebrauch ge-macht vom Rating-Scale-Modell aus der Familie der Rasch-Verfahren, das im originären Kontext zur Fragebogenkonstruktion eingesetzt wird. Für den vorliegenden Anwendungsfall eignet es sich unter anderem deshalb besonders gut, da es die Diskrepanz zwischen volitionalem Aufwand und volitionaler Kapazität – analog zur Itemschwierigkeit und Personenfähigkeit im ursprünglichen Anwendungsfall – abbildet und daraus Wahrscheinlichkeiten für die Zielerreichung (ursprüng-lich: Itemlösung) errechnet. Anhand dessen wird der Bereich auf der Zielspanne bestimmt, der die höchste Erreichungswahrscheinlichkeit hat und daraus wiederum die Empfehlung abgeleitet. Der entwickelte Algorithmus wird anschließend in der Activity-Tracking-App My Exercise Tra-cker umgesetzt, um als Proof of Concept in einer langzeitlichen Feldstudie ausgerollt und unter-sucht zu werden. Für den Praxiseinsatz ist die Erfassung von Kontextfaktoren, die in die Empfeh-lung einfließen, maßgeblich. Aufgrund des Fehlens praxistauglicher Instrumente, werden zur Er-hebung der Variablen der volitionalen Kapazität bildbasierte Ein-Item-Skalen vorgeschlagen und in drei Studien mit insgesamt n = 879 Teilnehmenden hinsichtlich gängiger Testgütekriterien va-lidiert. Zur Erhebung der Variablen des volitionalen Aufwands werden ebenfalls Instrumente vorgeschlagen und mit n = 59 Teilnehmenden validiert. Bei der Umsetzung der App werden zu-dem zahlreiche Techniken der Einbeziehung der Nutzer:innen in den Empfehlungs- und Ent-scheidungsprozess genutzt. Hierfür wird ein im Rahmen dieser Arbeit entwickeltes Design-Framework angewendet. Das Framework umfasst die drei Kernziele Empower, Encourage und Engage, die darauf abzielen, die Einbeziehung der Nutzer:innen zu fördern. Empower bezieht sich auf die Befähigung der Nutzer:innen, die Hintergründe und Implikationen von Systemergeb-nissen zu verstehen, während Encourage sie dazu anregt, die Ergebnisse kritisch zu reflektieren und ihnen nicht blind zu vertrauen. Engage schließlich ermöglicht den Nutzer:innen, durch ge-eignete Interaktionselemente Einfluss auf die Datengrundlage und die Rechenmethoden des Sys-tems zu nehmen, was ihre Entscheidungsautonomie stärkt und eine tiefere Einbindung in den Prozess fördert. Das Framework schlägt für jedes dieser Kernziele abstrakte Strategien, konkrete Strategien und schließlich Implementierungstechniken vor, von denen eine Vielzahl in My Exer-cise Tracker umgesetzt wird. Die zielsetzungsunterstützenden Wirkung des algorithmischen Ansatzes sowie der Einbeziehung der Nutzer:innen wird auf Basis einer zehnmonatigen Feldstudie mit auswertbaren Daten aus ins-gesamt 1391 Nutzungswochen, die sich auf 72 Nutzer:innen verteilen, untersucht. Den Studien-ergebnissen ist zu entnehmen, dass der Algorithmus die Leistungsschwankungen der Nutzer:in-nen gut abbildet, bei einer Tendenz zur Überschätzung, was jedoch vor dem Hintergrund der Herausforderung nicht zwingend nachteilig ist. Im Vergleich zu anderen Ansätzen, die basierend auf den Studiendaten rechnerisch gegenübergestellt werden, liefert der hier vorgeschlagene Al-gorithmus die passendsten Empfehlungen. Es werden zudem Verbesserungspotenziale des Algo-rithmus untersucht und letztendlich eine Optimierung vorgeschlagen. Zudem zeigen die Studien-ergebnisse, dass die Einbeziehung der Nutzer:innen in den Empfehlungsprozess gelungen ist und zu verbesserten Entscheidungen führt.}, note = {Dissertation, Universität Duisburg-Essen, 2025}, doi = {10.17185/duepublico/84733}, url = {https://doi.org/10.17185/duepublico/84733}, language = {de} } @article{ubo_mods_00233930, author = {Burke, Robin and Adomavicius, Gediminas and Bogers, Toine and Di Noia, Tommaso and Kowald, Dominik and Neidhardt, Julia and Özgöbek, Özlem and Pera, Maria Soledad and Tintarev, Nava and Ziegler, Jürgen}, title = {De-centering the (Traditional) User: Multistakeholder Evaluation of Recommender Systems}, journal = {International Journal of Human Computer Studies}, year = {2025}, publisher = {Elsevier}, address = {Amsterdam}, volume = {203}, keywords = {Evaluation; Multistakeholder issues; Recommender systems}, abstract = {Multistakeholder recommender systems are those that account for the impacts and preferences of multiple groups of individuals, not just the end users receiving recommendations. Due to their complexity, these systems cannot be evaluated strictly by the overall utility of a single stakeholder, as is often the case of more mainstream recommender system applications. In this article, we focus our discussion on the challenges of multistakeholder evaluation of recommender systems. We bring attention to the different aspects involved – from the range of stakeholders involved (including but not limited to providers and consumers) to the values and specific goals of each relevant stakeholder. We discuss how to move from theoretical principles to practical implementation, providing specific use case examples. Finally, we outline open research directions for the RecSys community to explore. We aim to provide guidance to researchers and practitioners about incorporating these complex and domain-dependent issues of evaluation in the course of designing, developing, and researching applications with multistakeholder aspects.}, issn = {1095-9300}, doi = {10.1016/j.ijhcs.2025.103560}, url = {http://arxiv.org/abs/2501.05170}, archiveprefix = {arXiv}, eprint = {2501.05170}, language = {en} } @article{ubo_mods_00233870, author = {Burke, Robin and Adomavicius, Gediminas and Bogers, Toine and Di Noia, Tommaso and Kowald, Dominik and Neidhardt, Julia and Özgöbek, Özlem and Pera, Maria Soledad and Tintarev, Nava and Ziegler, Jürgen}, title = {De-centering the (Traditional) User: Multistakeholder Evaluation of Recommender Systems}, journal = {International Journal of Human Computer Studies}, year = {2025}, publisher = {Elsevier}, address = {Amsterdam}, volume = {203}, keywords = {Recommender systems; Evaluation; Multistakeholder issues}, abstract = {Multistakeholder recommender systems are those that account for the impacts and preferences of multiple groups of individuals, not just the end users receiving recommendations. Due to their complexity, these systems cannot be evaluated strictly by the overall utility of a single stakeholder, as is often the case of more mainstream recommender system applications. In this article, we focus our discussion on the challenges of multistakeholder evaluation of recommender systems. We bring attention to the different aspects involved – from the range of stakeholders involved (including but not limited to providers and consumers) to the values and specific goals of each relevant stakeholder. We discuss how to move from theoretical principles to practical implementation, providing specific use case examples. Finally, we outline open research directions for the RecSys community to explore. We aim to provide guidance to researchers and practitioners about incorporating these complex and domain-dependent issues of evaluation in the course of designing, developing, and researching applications with multistakeholder aspects.}, issn = {1095-9300}, doi = {10.1016/j.ijhcs.2025.103560}, url = {http://arxiv.org/abs/2501.05170}, archiveprefix = {arXiv}, eprint = {2501.05170}, language = {en} } @inproceedings{ubo_mods_00233797, author = {Musto, Cataldo and Polignano, Marco and Rapp, Amon and Semeraro, Giovanni and Ziegler, Jürgen}, editor = {Association for Computing Machinery}, title = {7th Workshop on Explainable User Models and Personalised Systems (ExUM 2025)}, booktitle = {UMAP Adjunct ’25: Adjunct Proceedings of the 33rd ACM Conference on User Modeling, Adaptation and Personalization}, year = {2025}, publisher = {Association for Computing Machinery, Inc}, address = {New York}, pages = {174–176}, keywords = {Explainability; Explanations; Interpretability; Personalization; Recommender Systems; Transparency; User Models}, isbn = {9798400713996}, doi = {10.1145/3708319.3727557}, url = {https://doi.org/10.1145/3708319.3727557}, language = {en} } @inproceedings{ubo_mods_00233373, author = {Suchmann, Lovis Bero}, editor = {Li, Toby and Paternó, Fabio and Väänänen, Kaisa}, title = {Item Space Sensemaking: Proactive and Predictable Decision Support to Help Users of Information Retrieval Systems Set Realistic Expectations and Manage Tradeofs}, booktitle = {IUI ’25 Companion: Companion Proceedings of the 30th International Conference on Intelligent User Interfaces}, year = {2025}, publisher = {Association for Computing Machinery}, address = {New York}, pages = {229–231}, keywords = {branching; item distribution; item space; mental models; ridge plot; sensemaking; spatial mental models; tradeofs; understanding}, isbn = {9798400714092}, doi = {10.1145/3708557}, url = {https://doi.org/10.1145/3708557.3716149}, language = {en} } @inproceedings{ubo_mods_00233083, author = {Ziegler, Jürgen}, editor = {Zaina, Luciana and Creissac Campos, José and Spano, Davide}, title = {Challenges in Integrating Conversational AI and GUI-Based Applications}, booktitle = {Engineering Interactive Computer Systems: EICS 2024 International Workshops; Revised Selected Papers}, series = {Lecture Notes in Computer Science}, year = {2025}, publisher = {Springer Science and Business Media Deutschland GmbH}, address = {Berlin; Heidelberg, Germany}, volume = {15518}, pages = {159–170}, keywords = {Conversational Recommender Systems}, isbn = {9783031917592}, issn = {1611-3349}, doi = {10.1007/978-3-031-91760-8}, url = {https://doi.org/10.1007/978-3-031-91760-8_11}, language = {en} } @article{ubo_mods_00230662, author = {Kleemann, Timm and Loepp, Benedikt and Ziegler, Jürgen}, title = {Knowledge Graph-Based Integration of Conversational Advisors and Faceted Filtering}, journal = {Interacting with Computers}, year = {2025}, publisher = {Oxford University Press (OUP)}, address = {Oxford}, volume = {37}, number = {3}, pages = {158–188}, keywords = {search interfaces; graph-based interaction; recommender systems; explanations; transparency; trust}, issn = {0953-5438}, doi = {10.1093/iwc/iwae044}, url = {https://doi.org/10.1093/iwc/iwae044}, note = {001315069500001}, language = {en} } @misc{ubo_mods_00230652, author = {Burke, Robin and Adomavicius, Gediminas and Bogers, Toine and Di Noia, Tommaso and Kowald, Dominik and Neidhardt, Julia and Özgöbek, Özlem and Soledad Pera, Maria and Tintarev, Nava and Ziegler, Jürgen}, title = {De-centering the (Traditional) User: Multistakeholder Evaluation of Recommender Systems}, year = {2025}, abstract = {Multistakeholder recommender systems are those that account for the impacts and preferences of multiple groups of individuals, not just the end users receiving recommendations. Due to their complexity, these systems cannot be evaluated strictly by the overall utility of a single stakeholder, as is often the case of more mainstream recommender system applications. In this article, we focus our discussion on the challenges of multistakeholder evaluation of recommender systems. We bring attention to the different aspects involved – from the range of stakeholders involved (including but not limited to providers and consumers) to the values and specific goals of each relevant stakeholder. We discuss how to move from theoretical principles to practical implementation, providing specific use case examples. Finally, we outline open research directions for the RecSys community to explore. We aim to provide guidance to researchers and practitioners about incorporating these complex and domain-dependent issues of evaluation in the course of designing, developing, and researching applications with multistakeholder aspects.}, doi = {10.48550/arXiv.2501.05170}, url = {http://arxiv.org/abs/2501.05170}, archiveprefix = {arXiv}, eprint = {2501.05170}, language = {en} } @phdthesis{ubo_mods_00228809, author = {Ma, Yuan}, title = {Meta-Intents: Interaction Preferences in Conversational Recommender Systems}, year = {2025}, address = {Duisburg, Essen}, keywords = {Meta Intents, Conversational Recommender Systems, HCI, User Modeling, Interaction Behavior Analysis}, abstract = {With advancements in natural language processing, dialogue systems have become increasingly proficient in comprehending users’ intricate utterances. This convergence, when integrated with the application contexts of recommendation systems, has given rise to a burgeoning research domain known as conversational recommender systems (CRS). CRS can obtain user preferences through text conversations with users and recommends appropriate products. Different from traditional RS, CRS has a higher degree of interaction freedom, which makes us expect that CRS can interact with customers like a real-life salesperson. For example, it can not only ask users for features requirements, but also remind users to compare the current product with other candidates. More personalized interactive functions can emerge in CRS scenarios and make CRS more efficient and user-friendly, at the same time, it also puts forward new requirements for the user model. Different users and contexts necessitate distinct interactive functionalities, highlighting the importance of understanding and describing users’ interactive preferences—a relatively underexplored area of research. In this work, we propose the concept of meta-intents (MI) which represent high-level user preferences related to the interaction styles and decision-making support in conversational recommender systems (CRS). We developed a stable instrument to measure MI via a two-stage factor analysis, revealing that MI can be linked to users’ general decision-making styles. This connection allows for the translation of broad psychological user characteristics into more concrete design guidance for CRS. After proposing MI, we conducted a series of user studies to analyze how they impact various users’ interaction behaviors in a real instance of CRS. We analyzed the observed phenomena and extracted some helpful suggestions for interaction design. These suggestions can help us understand the role of MI in actual scenarios and build a CRS interaction strategy that is more in line with user habits.}, note = {Dissertation, Universität Duisburg-Essen, 2025 (kumulative Dissertation)}, doi = {10.17185/duepublico/83003}, url = {https://doi.org/10.17185/duepublico/83003}, language = {en} } @phdthesis{ubo_mods_00225931, author = {Kleemann, Timm}, title = {An integrated approach for transparent, multi-level decision support in interactive recommender systems}, year = {2024}, address = {Duisburg, Essen}, keywords = {Empfehlungssystem}, abstract = {To facilitate the often complex product search on the Internet, various techniques such as search and filtering mechanisms or recommendation components are employed. Widely used faceted filtering systems allow users to successively narrow down the result set according to the filter settings that are applied. However, this method requires clear objectives and domain knowledge on the part of the users to purposefully refine the search results. Alternatively, conversational recommendation systems in the form of product advisors have recently gained significance. These systems recommend suitable products based on a series of questions, focusing more on the users’ tasks and usage scenarios rather than the technical properties of the products. Thus, even users with little domain knowledge can find adequate products. Online environments frequently offer their users different decision aids, and it has been observed that users switch between them during their search. If the chosen decision aid seems ineffective, for example, because the user is overwhelmed with the available configuration options or, conversely, the chosen decision aid offers too little control, users switch to a decision aid that appears to be more helpful. However, this search behavior is typically not supported by environments because the provided tools are mostly isolated with no data exchange between them. As a result, all previous settings are lost and the search process has to start over. Consequently, users must re-enter previously set preferences, increasing cognitive load and making the search and decision-making process inefficient. To address this issue, this work proposes an integrated approach for an interactive recommender system that combines different decision-making components and allows users to freely switch between them. Selection actions in one component affect the other component in a consistent and transparent manner and can be further adjusted there, enabling an efficient search. We propose methods to enable a coupling of various components and allow users a seamless transition between them to foster multi-level decision support. Furthermore, we describe approaches for visualizing and explaining the relationships between the components, thereby enabling a transparent and comprehensible recommendation process. Findings from user studies examining user behavior and subjective evaluation through prototype implementations demonstrate that the proposed hybrid approach is suitable for supporting users in their search and decision-making process. It was shown that the combination of a conversational advisor with filtering mechanisms using a knowledge graph and the resulting explanation of the mutual influences, compared to traditional systems in which components work in isolation, positively impacts the perceived transparency of the recommendation process and the acceptance of the results.}, note = {Dissertation, Universität Duisburg-Essen, 2024 (kumulative Dissertation)}, doi = {10.17185/duepublico/82489}, url = {https://doi.org/10.17185/duepublico/82489}, language = {en} } @article{ubo_mods_00225128, author = {Ma, Yuan and Ziegler, Jürgen}, title = {Investigating meta-intents: user interaction preferences in conversational recommender systems}, journal = {User Modeling and User-Adapted Interaction}, year = {2024}, publisher = {Springer}, pages = {in press}, keywords = {Conversational recommender systems; Conversational UI design; Interaction behavior analysis; User model}, note = {in press}, issn = {1573-1391}, doi = {10.1007/s11257-024-09411-3}, url = {https://doi.org/10.1007/s11257-024-09411-3}, language = {en} } @article{ubo_mods_00224989, author = {Kille, Benjamin and Lommatzsch, Andreas and Ziegler, Jürgen and Özgöbek, Özlem}, title = {Preface to the special issue on news personalization and analytics}, journal = {User Modeling and User-Adapted Interaction}, year = {2024}, publisher = {Springer}, pages = {in press}, note = {in press}, issn = {1573-1391}, doi = {10.1007/s11257-024-09415-z}, url = {https://doi.org/10.1007/s11257-024-09415-z}, language = {en} } @article{ubo_mods_00224970, author = {Kleemann, Timm and Loepp, Benedikt and Ziegler, Jürgen}, title = {Knowledge Graph-Based Integration of Conversational Advisors and Faceted Filtering}, journal = {Interacting with Computers}, year = {2024}, publisher = {Oxford University Press (OUP)}, address = {Oxford}, pages = {in press}, keywords = {search interfaces; graph-based interaction; recommender systems; explanations; transparency; trust}, note = {in press}, issn = {0953-5438}, doi = {10.1093/iwc/iwae044}, url = {https://doi.org/10.1093/iwc/iwae044}, language = {en} } @article{ubo_mods_00224541, author = {Ziegler, Jürgen and Donkers, Tim}, title = {From explanations to human-AI co-evolution: Charting trajectories towards future user-centric AI}, journal = {i-com: Journal of Interactive Media}, year = {2024}, publisher = {de Gruyter}, address = {Berlin}, volume = {23}, number = {2}, pages = {263–272}, keywords = {explainable AI; human-AI co-evolution; transmodal interaction; user-centric AI}, abstract = {This paper explores the evolving landscape of User-Centric Artificial Intelligence, particularly in light of the challenges posed by systems that are powerful but not fully transparent or comprehensible to their users. Despite advances in AI, significant gaps remain in aligning system actions with user understanding, prompting a reevaluation of what "user-centric"really means. We argue that current XAI efforts are often too much focused on system developers rather than end users, and fail to address the comprehensibility of the explanations provided. Instead, we propose a broader, more dynamic conceptualization of human-AI interaction that emphasizes the need for AI not only to explain, but also to co-create and cognitively resonate with users. We examine the evolution of a communication-centric paradigm of human-AI interaction, underscoring the need for AI systems to enhance rather than mimic human interactions. We argue for a shift toward more meaningful and adaptive exchanges in which AI’s role is understood as facilitative rather than autonomous. Finally, we outline how future UCAI may leverage AI’s growing capabilities to foster a genuine co-evolution of human and machine intelligence, while ensuring that such interactions remain grounded in ethical and user-centered principles.}, note = {CA Ziegler}, issn = {2196-6826}, doi = {10.1515/icom-2024-0020}, url = {https://doi.org/10.1515/icom-2024-0020}, language = {en} } @inproceedings{ubo_mods_00223530, author = {Smits, Aletta and Detweiler, Chris and Bartels, Ester and Pott, Katja and van der Stappen, Esther and van Rossen, Suzanne and Cardona, Karine and Shayan, Shakila and Ziegler, Jürgen and van Turhout, Koen}, editor = {Bramwell-Dicks, Anna and Evans, Abigail and Winckler, Marco and Petrie, Helen and Abdelnour-Nocera, José}, title = {Assessing the Utility of an Interaction Qualities Framework in Systematizing the Evaluation of User Control}, booktitle = {Design for Equality and Justice: INTERACT 2023 IFIP TC 13 Workshops, York, UK, August 28 – September 1, 2023, Revised Selected Papers, Part II}, series = {Lecture Notes in Computer Science (LNCS 14536)}, year = {2024}, publisher = {Springer}, address = {Berlin; Heidelberg, Germany}, pages = {185–195}, keywords = {Algorithmic Affordances; Human-AI Interaction; Interaction Aesthetics; Interaction Qualities; Pattern Library; User Control}, isbn = {978-3-031-61697-6}, issn = {1611-3349}, doi = {10.1007/978-3-031-61698-3}, url = {https://doi.org/10.1007/978-3-031-61698-3_17}, language = {en} } @inproceedings{ubo_mods_00223529, author = {Bartels, Ester and Smits, Aletta and Detweiler, Chris and van der Stappen, Esther and van Rossen, Suzanne and Shayan, Shakila and Pott, Katja and Cardona, Karine and Ziegler, Jürgen and van Turnhout, Koen}, editor = {Bramwell-Dicks, Anna and Evans, Abigail and Winckler, Marco and Petrie, Helen and Abdelnour-Nocera, José}, title = {Exploring Categorizations of Algorithmic Affordances in Graphical User Interfaces of Recommender Systems}, booktitle = {Design for Equality and Justice: Revised Selected Papers, Part II}, series = {Lecture Notes in Computer Science (LNCS)}, year = {2024}, publisher = {Springer}, address = {Berlin; Heidelberg, Germany}, volume = {14536}, pages = {173–184}, keywords = {Algorithmic Affordances; Design Patterns; Graphical User Interfaces; Recommender Systems; Research-Practice Gap; User Control}, isbn = {978-3-031-61697-6}, issn = {1611-3349}, doi = {10.1007/978-3-031-61698-3_16}, url = {https://doi.org/10.1007/978-3-031-61698-3_16}, language = {en} } @inproceedings{ubo_mods_00223527, author = {van Rossen, Suzanne and Bartels, Ester and Cardona, Karine and Detweiler, Chris and Pott, Katja and Shayan, Shakila and Smits, Aletta and Ziegler, Jürgen and van der Stappen, Esther}, editor = {Bramwell-Dicks, Anna and Evans, Abigail and Winckler, Marco and Petrie, Helen and Abdelnour-Nocera, José}, title = {Design Ideas for Recommender Systems in Flexible Education: How Algorithmic Affordances May Address Ethical Concerns}, booktitle = {Design for Equality and Justice: Revised Selected Papers, Part II}, series = {Lecture Notes in Computer Science (LNCS)}, year = {2024}, publisher = {Springer}, address = {Berlin; Heidelberg, Germany}, volume = {14536}, pages = {205–213}, keywords = {Algorithmic Affordances; Ethics; Flexible Education; Interface Design; Recommender Systems; Responsible AI}, isbn = {978-3-031-61697-6}, issn = {1611-3349}, doi = {10.1007/978-3-031-61698-3}, url = {https://doi.org/10.1007/978-3-031-61698-3_19}, language = {en} } @inproceedings{ubo_mods_00222973, author = {Polignano, Marco and Musto, Cataldo and Delić, Amra and Inel, Oana and Rapp, Amon and Semeraro, Giovanni and Ziegler, Jürgen}, editor = {The Association for Computing Machinery (ACM)}, title = {ExUM 2024 - 6th Workshop on Explainable User Modeling and Personalised Systems}, booktitle = {Adjunct Proceedings of the 32nd ACM Conference on User Modeling, Adaptation and Personalization (UMAP Adjunct ’24)}, year = {2024}, publisher = {ACM}, address = {New York}, pages = {236–239}, keywords = {Explainability; Interpretability; Personalization; Recommender Systems; Transparency; User Modeling}, isbn = {979-8-4007-0466-6}, doi = {10.1145/3631700.3658536}, url = {https://doi.org/10.1145/3631700.3658536}, language = {en} } @inproceedings{ubo_mods_00222972, author = {Loepp, Benedikt and Ziegler, Jürgen}, editor = {The Association for Computing Machinery (ACM)}, title = {Exploring the Potential of Generative AI for Augmenting Choice-Based Preference Elicitation in Recommender Systems}, booktitle = {Adjunct Proceedings of the 32nd ACM Conference on User Modeling, Adaptation and Personalization (UMAP Adjunct ’24)}, year = {2024}, publisher = {ACM}, address = {New York}, pages = {114–119}, keywords = {Large language models; Preference elicitation; Recommender systems; User experience}, isbn = {979-8-4007-0466-6}, doi = {10.1145/3631700.3664873}, url = {https://doi.org/10.1145/3631700.3664873}, language = {en} } @inproceedings{ubo_mods_00222970, author = {Ma, Yuan and Ziegler, Jürgen}, editor = {The Association for Computing Machinery (ACM)}, title = {The Effect of Proactive Cues on the Use of Decision Aids in Conversational Recommender Systems}, booktitle = {Adjunct Proceedings of the 32nd ACM Conference on User Modeling, Adaptation and Personalization (UMAP Adjunct ’24)}, year = {2024}, publisher = {ACM}, address = {New York}, pages = {305–315}, keywords = {Conversational recommender systems; Conversational UI design; Interaction behavior analysis; Meta-intents; Proactive interaction scheme}, isbn = {979-8-4007-0466-6}, doi = {10.1145/3631700.3665186}, url = {https://doi.org/10.1145/3631700.3665186}, language = {en} } @inproceedings{ubo_mods_00222923, author = {Suchmann, Lovis Bero and Krämer, Nicole and Ziegler, Jürgen}, editor = {The Association for Computing Machinery (ACM)}, title = {Dynamic Ridge Plot Sliders: Supporting Users’ Understanding of the Item Space Structure and Feature Dependencies in Interactive Recommender Systems}, booktitle = {Adjunct Proceedings of the 32nd ACM Conference on User Modeling, Adaptation and Personalization (UMAP Adjunct ’24)}, year = {2024}, publisher = {ACM}, address = {New York}, pages = {106–113}, isbn = {979-8-4007-0466-6}, doi = {10.1145/3631700.3664872}, url = {https://doi.org/10.1145/3631700.3664872}, language = {en} } @article{ubo_mods_00222507, author = {Ziegler, Jürgen and Donkers, Tim}, title = {From explanations to human-AI co-evolution: Charting trajectories towards future user-centric AI}, journal = {i-com: Journal of Interactive Media}, year = {2024}, publisher = {de Gruyter}, address = {Berlin}, pages = {in press}, keywords = {explainable AI; human-AI co-evolution; transmodal interaction; user-centric AI}, abstract = {This paper explores the evolving landscape of User-Centric Artificial Intelligence, particularly in light of the challenges posed by systems that are powerful but not fully transparent or comprehensible to their users. Despite advances in AI, significant gaps remain in aligning system actions with user understanding, prompting a reevaluation of what "user-centric"really means. We argue that current XAI efforts are often too much focused on system developers rather than end users, and fail to address the comprehensibility of the explanations provided. Instead, we propose a broader, more dynamic conceptualization of human-AI interaction that emphasizes the need for AI not only to explain, but also to co-create and cognitively resonate with users. We examine the evolution of a communication-centric paradigm of human-AI interaction, underscoring the need for AI systems to enhance rather than mimic human interactions. We argue for a shift toward more meaningful and adaptive exchanges in which AI’s role is understood as facilitative rather than autonomous. Finally, we outline how future UCAI may leverage AI’s growing capabilities to foster a genuine co-evolution of human and machine intelligence, while ensuring that such interactions remain grounded in ethical and user-centered principles.}, note = {in press, CA Ziegler}, issn = {2196-6826}, doi = {10.1515/icom-2024-0020}, url = {https://doi.org/10.1515/icom-2024-0020}, language = {en} } @inproceedings{ubo_mods_00222345, author = {Dix, Alan and Luyten, Kris and Mayer, Sven and Palanque, Philippe and Panizzi, Emanuele and Spano, Lucio Davide and Ziegler, Jürgen}, editor = {Nebeling, Michael and Spano, Lucio Davide and Campos, José Creissac}, title = {Second Workshop on Engineering Interactive Systems Embedding AI Technologies}, booktitle = {EICS ’24 Companion: Companion Proceedings of the 16th ACM SIGCHI Symposium on Engineering Interactive Computing Systems}, year = {2024}, publisher = {Association for Computing Machinery}, address = {New York}, pages = {103–107}, isbn = {979-8-4007-0651-6}, doi = {10.1145/3660515}, url = {https://doi.org/10.1145/3660515.3662837}, language = {en} } @inproceedings{ubo_mods_00222337, author = {Loepp, Benedikt and Ziegler, Jürgen}, title = {Exploring the Potential of Generative AI for Augmenting Choice-Based Preference Elicitation in Recommender Systems}, booktitle = {UMAP Adjunct ’24: Adjunct Proceedings of the 32nd ACM Conference on User Modeling, Adaptation and Personalization}, year = {2024}, publisher = {Association for Computing Machinery}, address = {New York}, pages = {114–119}, isbn = {979-8-4007-0466-6}, doi = {10.1145/3631700}, url = {https://doi.org/10.1145/3631700.3664873}, language = {en} } @inproceedings{ubo_mods_00222336, author = {Ma, Yuan and Ziegler, Jürgen}, title = {The Effect of Proactive Cues on the Use of Decision Aids in Conversational Recommender Systems}, booktitle = {Adjunct Proceedings of the 32nd ACM Conference on User Modeling, Adaptation and Personalization}, year = {2024}, publisher = {ACM}, address = {New York}, isbn = {979-8-4007-0466-6}, doi = {10.1145/3631700.3665186}, url = {https://doi.org/10.1145/3631700}, language = {en} } @phdthesis{ubo_mods_00217204, author = {Donkers, Tim}, title = {Harnessing Latent Space Semantics for Enhanced Interpretability of Recommender Systems in Item Retrieval and Online Communication Dynamics}, year = {2024}, address = {Duisburg, Essen}, keywords = {Recommender Systems, Collaborative Filtering, Machine Learning, Deep Learning, Latent Space Semantics, Interpretability, Transparency, User-centered Design, Online Social Networks, Social Polarization, Filter Bubbles, Echo Chambers, Systems Theory, Simulation, Opinion Dynamics, Agent-based Modeling}, abstract = {Recommender systems, in today’s digital age, have emerged as influential algorithmic curators, significantly shaping content consumption, e-commerce, and public opinion. While the majority of research in this area has been anchored in algorithm development and offline evaluation, user-centered considerations are still conspicuously neglected. In particular, pervasive technologies, while powerful, tend to operate as inscrutable \backslashemph{black boxes}, concealing their inner workings from both developers and end users. By exploring the potential for improving the interpretability of the latent information spaces employed by many recommendation models, this work emphasizes the importance of understanding the structural conditions that form the underlying data base. It highlights the depth of insight that can be gained from the intricate relationships between the entities under consideration, and aims to bridge the current gaps in our understanding of recommender systems. The first goal of this thesis is to advance model-based recommender systems by harnessing the power of latent information spaces. To this end, two novel methods are introduced: Tag-enhanced Matrix Factorization (TagMF) and Aspect-based Transparent Memories (ATM). TagMF extends traditional matrix factorization by intertwining associations between items and tags, thereby indirectly inferring user-tag relationships as well. This not only enriches the user-item preference matrix, improving prediction accuracy and mitigating data sparsity issues, but also increases the degree to which the otherwise latent semantics can be interpreted. On the other hand, ATM leverages user reviews and applies deep learning techniques to provide evidence-backed recommendations. By associating the semantic subtleties within its latent space with concrete user utterances, ATM paves the way for transparent recommender systems that more closely resemble how humans justify their evaluations of items. Together, these approaches, validated by user studies, enable users to interactively navigate and influence the recommendation process, increasing both perceived self-efficacy and recommendation quality. The second objective introduces a methodology grounded in simulation, offering a nuanced lens to comprehend social phenomena pertinent to recommender systems in online social networks. Recognizing the gaps in existing research, this approach underscores the significance of psychological and sociological factors in deciphering the impact of these systems. Traditional offline evaluations, predominantly centered on predicting item ratings or rankings, often bypass the diverse influences on decision-making within recommendation tasks. While user-centric experimental studies have sought alignment between recommendation technology and psychological or demographic attributes, they tend to narrow down phenomena to individual experiences. In environments like social networks, where collective dynamics are crucial, broader effects must be considered to fully grasp the societal implications of recommender systems. To bridge these research voids, our methodology harnesses the rich semantic connections inherent in latent information spaces. It seeks to analyze phenomena such as the polarization of ideological groups by tracing the evolution of these semantics. This perspective allows us to understand how the dynamics between individual users, their social environment, and algorithm-driven content distribution together influence the spread of opinions and the manifestation of particular beliefs within online networks. In summary, this thesis presents an alternative approach to studying recommender systems that emphasizes human factors and latent semantics. It argues that, beyond predicting ratings or ranking alternatives, additional information needs can be satisfied by accessing and disclosing latent semantics inferred by contemporary machine learning technologies, ultimately enabling users to properly evaluate system-side suggestions. In addition, the work proposes a simulation paradigm to reconcile psychological and sociological factors influencing decision-making and communication behavior with variations in recommendation technology. These contributions aim to improve our understanding of the complex relationship between users and recommender systems, ultimately enhancing their functionality and impact.}, note = {Dissertation, Universität Duisburg-Essen, 2024, kumulativ}, doi = {10.17185/duepublico/81491}, url = {https://doi.org/10.17185/duepublico/81491}, language = {en} } @inproceedings{ubo_mods_00224770, author = {Palanque, Philippe and Paternò, Fabio and Roto, Virpi and Schmidt, Albrecht and Stumpf, Simone and Ziegler, Jürgen}, editor = {Nocera, José Abdelnour and Lárusdóttir, Marta Kristı́n and Petrie, Helen and Piccinno, Antonio and Winckler, Marco}, title = {A Multi-perspective Panel on User-Centred Transparency, Explainability, and Controllability in Automations}, booktitle = {Human-Computer Interaction – INTERACT 2023: Proceedings}, series = {Lecture Notes in Computer Science}, year = {2023}, publisher = {Springer Science and Business Media Deutschland GmbH}, address = {Berlin}, volume = {14145}, pages = {349–353}, keywords = {Artificial Intelligence; Automations; Human-Computer Interaction}, isbn = {978-3-031-42292-8}, issn = {0302-9743}, doi = {10.1007/978-3-031-42293-5}, url = {https://doi.org/10.1007/978-3-031-42293-5_34}, language = {en} } @incollection{ubo_mods_00220270, author = {Ziegler, Jürgen and Loepp, Benedikt}, editor = {Vanderdonckt, Jean and Palanque, Philippe and Winckler, Marco}, title = {Interactive Recommendation Systems}, booktitle = {Handbook of Human Computer Interaction}, year = {2023}, publisher = {Springer}, address = {Cham}, pages = {1–29}, isbn = {978-3-319-27648-9}, doi = {10.1007/978-3-319-27648-9_54-1}, url = {https://doi.org/10.1007/978-3-319-27648-9_54-1}, language = {en} } @article{ubo_mods_00214204, author = {Donkers, Tim and Ziegler, Jürgen}, title = {De-sounding echo chambers: Simulation-based analysis of polarization dynamics in social networks}, journal = {Online Social Networks and Media}, year = {2023}, publisher = {Elsevier}, address = {Amsterdam}, volume = {37-38}, keywords = {Agent-based modeling; Echo chambers; Filter bubbles; Knowledge-graph embedding; Latent space models; Machine learning; Opinion dynamics; Recommender systems; Social media; Social polarization}, abstract = {As online social networks have become dominant platforms for public discourse worldwide, there is growing anecdotal evidence of a concurrent rise in social antagonisms. Yet, while the increase in polarization is evident, the extent to which these digital communication ecosystems are driving this shift remains elusive. A dominant scholarly perspective suggests that digital social media lead to the compartmentalization of information channels, potentially culminating in the emergence of echo chambers. However, a growing body of empirical research suggests that the mechanisms influencing ideological demarcation are more complex than a complete communicative decoupling of user groups. This study introduces two intertwined principles that elucidate the dynamics of digital communication: First, socio-cognitive biases of social group formation enforce internal congruence of ideological communities by demarcation from outsiders. Second, algorithmic personalization of content contributes to ideological network formation by creating social redundancy, wherein the same individuals frequently interact in various roles, such as authors, recipients, or disseminators of messages, leading to a surplus of shared ideological fragments. Leveraging these insights, we pioneer a computational simulation model, integrating machine learning based on behavioral data and established recommendation technologies, to explore the evolution of social network structures in digital exchanges. Utilizing advanced methods in opinion dynamics, our model uniquely captures both the algorithmic delivery and the subsequent dissemination of messages by users. Our findings reveal that in ambiguous debate scenarios, the dual components of our model are essential to accurately capture the emergence of social polarization. Consequently, our model offers a forward-looking perspective on the evolution of network communication, facilitating nuanced comparisons with empirical graph benchmarks.}, issn = {2468-6964}, doi = {10.1016/j.osnem.2023.100275}, url = {https://doi.org/10.1016/j.osnem.2023.100275}, language = {en} } @incollection{ubo_mods_00210591, author = {Ma, Yuan and Ziegler, Jürgen}, editor = {Zhang, Jie and Chen, Li}, title = {Initiative transfer in conversational recommender systems}, booktitle = {Proceedings of the 17th ACM Conference on Recommender Systems, RecSys 2023}, year = {2023}, publisher = {Association for Computing Machinery, Inc}, address = {New York}, pages = {978–984}, keywords = {Conversational recommender systems; Conversational UI design; Initiative transfer; Interaction behavior analysis}, abstract = {Conversational recommender systems (CRS) are increasingly designed to offer mixed-initiative dialogs in which the user and the system can take turns in starting a communicative exchange, for example, by asking questions or stating preferences. However, whether and when users make use of the mixed-initiative capabilities in a CRS and which factors influence their behavior is as yet not well understood. We report an online study investigating user interaction behavior, especially the transfer of initiative between user and system in a real-time online CRS. We assessed the impact of dialog initiative at system start as well as of several psychological user characteristics that may influence their preference for either initiative mode. To collect interaction data, we implemented a chatbot in the domain of smartphones. Two groups of participants on Prolific (total n=143) used the system which started either with a system-initiated or user-initiated dialog. In addition to interaction data, we measured several psychological factors as well as users’ subjective assessment of the system through questionnaires. We found that: 1. Most users tended to take over the initiative from the system or stay in user-initiated mode when this mode was offered initially. 2. Starting the dialog in user-initiated mode CRS led to fewer interactions needed for selecting a product than in system-initiated mode. 3. The user’s initiative transfer was mainly affected by their personal interaction preferences (especially initiative preference). 4. The initial mode of the mixed-initiative CRS did not affect the user experience, but the occurrence of initiative transfers in the dialog negatively affected the degree of user interest and excitement. The results can inform the design and potential personalization of CRS.}, isbn = {9798400702419}, doi = {10.1145/3604915.3608858}, url = {https://doi.org/10.1145/3604915.3608858}, language = {en} } @inproceedings{ubo_mods_00210590, author = {Loepp, Benedikt and Ziegler, Jürgen}, editor = {Zhang, Jie and Chen, Li}, title = {How Users Ride the Carousel: Exploring the Design of Multi-List Recommender Interfaces From a User Perspective}, booktitle = {Proceedings of the 17th ACM Conference on Recommender Systems, RecSys 2023}, year = {2023}, publisher = {Association for Computing Machinery, Inc}, address = {New York}, pages = {1090–1095}, keywords = {Carousel interfaces; Choice overload; Multi-list recommendations; User Experience}, abstract = {Multi-list interfaces are widely used in recommender systems, especially in industry, showing collections of recommendations, one below the other, with items that have certain commonalities. The composition and order of these "carousels"are usually optimized by simulating user interaction based on probabilistic models learned from item click data. Research that actually involves users is rare, with only few studies investigating general user experience in comparison to conventional recommendation lists. Hence, it is largely unknown how specific design aspects such as carousel type and length influence the individual perception and usage of carousel-based interfaces. This paper seeks to fill this gap through an exploratory user study. The results confirm previous assumptions about user behavior and provide first insights into the differences in decision making in the presence of multiple recommendation carousels.}, isbn = {9798400702419}, doi = {10.1145/3604915.3610638}, url = {https://doi.org/10.1145/3604915.3610638}, language = {en} } @inproceedings{ubo_mods_00210431, author = {Suchmann, Lovis Bero and Krämer, Nicole and Ziegler, Jürgen}, editor = {The Association for Computing Machinery}, title = {Branching Preferences: Visualizing Non-linear Topic Progression in Conversational Recommender Systems}, booktitle = {UMAP 2023: Adjunct Proceedings of the 31st ACM Conference on User Modeling, Adaptation and Personalization ; 26-30 June, 2023, Limassol, Cyprus}, series = {ACM Conferences}, year = {2023}, publisher = {Association for Computing Machinery}, address = {New York}, pages = {199–205}, keywords = {Branching Diagrams; Conversational Recommender Systems; Mental Models; Topic Progression}, isbn = {978-1-4503-9891-6}, doi = {10.1145/3563359}, url = {https://doi.org/10.1145/3563359.3597380}, language = {en} } @inproceedings{ubo_mods_00210388, author = {Musto, Cataldo and Delic, Amra and Inel, Oana and Polignano, Marco and Rapp, Amon and Semeraro, Giovanni and Ziegler, Jürgen}, editor = {The Association for Computing Machinery}, title = {5th Workshop on Explainable User Models and Personalised Systems (ExUM)}, booktitle = {UMAP 2023: Adjunct Proceedings of the 31st ACM Conference on User Modeling, Adaptation and Personalization ; 26-30 June, 2023, Limassol, Cyprus}, series = {ACM Conferences}, year = {2023}, publisher = {Association for Computing Machinery}, address = {New York}, pages = {196–198}, keywords = {Explainability; Interpretability; Personalization; Recommender Systems; Transparency; User Modeling}, isbn = {978-1-4503-9891-6}, doi = {10.1145/3563359}, url = {https://doi.org/10.1145/3563359.3595629}, language = {en} } @article{ubo_mods_00205246, author = {Loepp, Benedikt}, title = {Multi-list interfaces for recommender systems: Survey and future directions}, journal = {Frontiers in Big Data}, year = {2023}, publisher = {Frontiers Media}, address = {Lausanne}, volume = {6}, keywords = {Recommender systems; Multi-list recommendation; Carousels; User interfaces; User experience; Choice overload; Survey}, abstract = {For a long time, recommender systems presented their results in the form of simple item lists. In recent years, however, multi-list interfaces have become the de-facto standard in industry, presenting users with numerous collections of recommendations, one below the other, each containing items with common characteristics. Netflix’s interface, for instance, shows movies from certain genres, new releases, and lists of curated content. Spotify recommends new songs and albums, podcasts on specific topics, and what similar users are listening to. Despite their popularity, research on these so-called “carousels” is still limited. Few authors have investigated how to simulate the user behavior and how to optimize the recommendation process accordingly. The number of studies involving users is even smaller, with sometimes conflicting results. Consequently, little is known about how to design carousel-based interfaces for achieving the best user experience. This mini review aims to organize the existing knowledge and outlines directions that may improve the multi-list presentation of recommendations in the future.}, note = {in press}, issn = {2624-909X}, doi = {10.3389/fdata.2023.1239705}, url = {https://doi.org/10.3389/fdata.2023.1239705}, language = {en} } @article{ubo_mods_00204805, author = {Hernandez-Bocanegra, Diana C. and Ziegler, Jürgen}, title = {Explaining Recommendations through Conversations: Dialog Model and the Effects of Interface Type and Degree of Interactivity}, journal = {ACM Transactions on Interactive Intelligent Systems (TiiS)}, year = {2023}, publisher = {Association for Computing Machinery (ACM)}, address = {New York}, volume = {13}, number = {2}, keywords = {Recommender systems; explanations; argumentation; interactive interfaces; conversational agent; dataset; intent detection; user study}, issn = {2160-6455}, doi = {10.1145/3579541}, url = {https://doi.org/10.1145/3579541}, note = {001018513000001}, language = {en} } @incollection{ubo_mods_00204623, author = {Ziegler, Jürgen and Loepp, Benedikt}, editor = {Augstein, Mirjam and Herder, Eelco and Wörndl, Wolfgang}, title = {User-centered recommender systems}, booktitle = {Personalized Human-Computer Interaction}, series = {De Gruyter Textbook}, year = {2023}, edition = {2}, publisher = {De Gruyter Oldenbourg}, address = {Berlin}, pages = {33–58}, keywords = {Recommender systems; Visualization; Interactive recommending; Explanations; Evaluation}, isbn = {9783110988567}, doi = {10.1515/9783110988567-002}, url = {https://doi.org/10.1515/9783110988567-002}, language = {en}, abstract = {Recommender systems aim at facilitating users’ search and decision-making when they are faced with a large number of available options, such as buying products online or selecting music tracks to listen to. A broad range of machine learning models and algorithms has been developed that aim at predicting users’ assessment of unseen items and at recommending items that best match their interests. However, it has been shown that optimizing the system in terms of algorithm accuracy often does not result in a correspondingly high level of user satisfaction. Therefore, a more user-centric approach to developing recommender systems is needed that better takes into account users’ actual goals, the current context and their cognitive demands. In this chapter, we discuss a number of techniques and design aspects that can contribute to increasing transparency, user understanding and interactive control of recommender systems. Furthermore, we present methods for evaluating systems from a user perspective and point out future research directions.} } @inproceedings{loepp2023how, author = {Loepp, Benedikt and Ziegler, Jürgen}, booktitle = {RecSys ’23: Proceedings of the 17th ACM Conference on Recommender Systems}, title = {How Users Ride the Carousel: Exploring the Design of Multi-List Recommender Interfaces From a User Perspective}, year = {2023}, address = {New York, NY, USA}, publisher = {ACM}, isbn = {9798400702419}, url = {https://doi.org/10.1145/3604915.3610638}, doi = {10.1145/3604915.3610638}, abstract = {Multi-list interfaces are widely used in recommender systems, especially in industry, showing collections of recommendations, one below the other, with items that have certain commonalities. The composition and order of these "carousels" are usually optimized by simulating user interaction based on probabilistic models learned from item click data. Research that actually involves users is rare, with only few studies investigating general user experience in comparison to conventional recommendation lists. Hence, it is largely unknown how specific design aspects such as carousel type and length influence the individual perception and usage of carousel-based interfaces. This paper seeks to fill this gap through an exploratory user study. The results confirm previous assumptions about user behavior and provide first insights into the differences in decision making in the presence of multiple recommendation carousels.} } @inproceedings{kleemann2023, abstract = {Today’s e-commerce websites often provide many different components, such as filters and conversational product advisors, to help users find relevant items. However, filters and advisors are often presented separately and treated as independent entities so that the previous input is discarded when users switch between them. This leads to memory loads and disruptions during the search process. In addition, the reasoning behind the advisors’ results is often not transparent. To overcome these limitations, we propose a novel approach that exploits a graph structure to create an integrated system that allows a seamless coupling between filters and advisors. The integrated system utilizes the graph to suggest appropriate filter values and items based on the user’s answers in the advisor. Moreover, it determines follow-up questions based on the filter values set by the user. The interface visualizes and explains the relationship between a given answer and its relevant features to achieve increased transparency in the guidance process. We report the results of an empirical user study with 120 participants that compares the integrated system to a system in which the filtering and advisory mechanisms operate separately. The findings indicate that displaying recommendations and explanations directly in the filter component can increase acceptance and trust in the system. Similarly, combining the advisor with the filters along with the displayed explanations leads to significantly higher levels of knowledge about the relevant product features.}, address = {Cham}, author = {Kleemann, Timm and Ziegler, Jürgen}, series = {Lecture Notes in Computer Science}, booktitle = {Human-Computer Interaction – INTERACT 2023 : 19th IFIP TC13 International Conference, York, UK, August 28 – September 1, 2023, Proceedings, Part III}, editor = {Abdelnour Nocera, José and Kristı́n Lárusdóttir, Marta and Petrie, Helen and Piccinno, Antonio and Winckler, Marco}, isbn = {9783031422850}, issn = {0302-9743}, volume = {14144}, doi = {10.1007/978-3-031-42286-7_8}, pages = {137–159}, publisher = {Springer Nature Switzerland}, title = {Blending Conversational Product Advisors and Faceted Filtering in a Graph-Based Approach}, url = {https://doi.org/10.1007/978-3-031-42286-7_8}, note = {10.1007/978-3-031-42286-7_8}, language = {en}, keywords = {Search interfaces; explanations; knowledge graph}, year = {2023}, month = {aug}, day = {25}, month_numeric = {8} } @inproceedings{ubo_mods_00199546, author = {Ma, Yuan and Donkers, Tim and Kleemann, Timm and Ziegler, Jürgen}, editor = {Gwizdka, Jacek and Rieh, Soo Young}, title = {An Instrument for measuring users’ meta-intents}, booktitle = {CHIIR ’23: Proceedings of the 2023 Conference on Human Information Interaction and Retrieval}, year = {2023}, publisher = {ACM}, address = {Washington}, pages = {290–302}, abstract = {We propose the concept of meta-intents which represent high-level user preferences related to the interaction and decision-making in conversational recommender systems (CRS) and present a questionnaire instrument for measuring meta-intents. We conducted a two-stage user study, an exploratory study with 212 participants on Prolific, and a confirmatory study with 394 participants on Prolific. We obtained a reliable and stable meta-intents questionnaire with 22 question items, corresponding to seven latent factors (concepts). These seven factors cover important interaction preferences and are closely related to users’ decision-making process. For example, the factor dialog-initiative reflects whether users prefer to follow the system’s guidance or ask their own questions in a CRS. We conducted statistical analyses of meta-intents in two domains (smartphones and hotels), and a general chatbot scenario. We also investigated the influence of additional factors (demography, decision-making style) on meta-intents through Structural Equation Modeling (SEM). Our results provide preliminary evidence that the proposed meta-intents are domain and demography (gender, age) independent. They can be linked to the general decision-making style and can thus be instrumental in translating general decision-making factors into more concrete design guidance for CRS and their potential personalization. Meta-intents also provide a basis for future analyses of interaction behavior in CRS and the development of a cognitively founded theoretical framework.}, isbn = {979-8-4007-0035-4}, doi = {10.1145/3576840}, url = {https://doi.org/10.1145/3576840.3578317}, language = {en} } @article{ubo_mods_00197856, author = {Álvarez Márquez, Jesús Omar and Ziegler, Jürgen}, title = {Creating Omni-Channel In-Store Shopping Experiences through Augmented-Reality-Based Product Recommending and Comparison}, journal = {International Journal of Human–Computer Interaction}, year = {2023}, publisher = {Taylor & Francis}, address = {New York}, pages = {in press}, note = {in press}, issn = {1044-7318}, doi = {10.1080/10447318.2022.2163650}, url = {https://doi.org/10.1080/10447318.2022.2163650}, language = {en} } @article{ubo_mods_00196239, author = {Kunkel, Johannes and Ziegler, Jürgen}, title = {A comparative study of item space visualizations for recommender systems}, journal = {International Journal of Human Computer Studies}, year = {2023}, publisher = {Elsevier}, address = {Amsterdam}, volume = {172}, keywords = {Empirical user studies; Information visualization; Maps; Recommender systems; Treemaps; User experience}, issn = {1095-9300}, doi = {10.1016/j.ijhcs.2022.102987}, url = {https://doi.org/10.1016/j.ijhcs.2022.102987}, language = {en} } @phdthesis{ubo_mods_00240396, author = {Álvarez Márquez, Jesús Omar}, title = {Decision-Making Support in Complex Multi-Actor and Multi-Source Scenarios}, year = {2022}, address = {Duisburg, Essen}, keywords = {complex decision environment; multiple actors; Empfehlungssystem; negotiation of preferences; in-store shopping support; Erweiterte Realität}, abstract = {The term “complex decision environment” has been used in literature to describe situations that involve making a decision with one or more of the following aspects: multiple stakeholders, multiple viable alternatives, contradictory or incomplete information, multiple sources, and dynamic settings. This thesis aims at achieving a better understanding of the processes that take place in or under complex decision environments, with a focus on cases where multiple actors or multiple sources of information are present. To that end, the first goal of this research work is to define specific but sufficiently common scenarios in which multi-factor decision-making takes place. Examining these scenarios can lead to a greater comprehension of the particular requirements, decision processes and challenges faced by decision-makers when caught in a multi-factor decision environment. After defining these scenarios and their characteristics, a second research goal is to design and evaluate suitable methods to support the decision-making process that takes place in them. The thesis presents investigations and developments in two different application contexts. The first one concentrates on complex multi-actor decision environments, illustrated by a group of non-collocated people who must jointly choose a hotel to stay together. The second scenario deals with complex multi-source decision environments, and more specifically with consumers facing a purchase decision in a physical store setting where online information is also available. Methods have been designed to assist decision-makers by taking into account the unique characteristics of each scenario, for which the use of recommender systems and technological innovations (especially in relation to augmented reality) has proven to be advantageous. The evaluation of the developed methods provides insight into the cognitive processes and constraints that emerge in multifactorial settings, and establishes design guidelines for future research.}, note = {Dissertation, Universität Duisburg-Essen, 2022}, doi = {10.17185/duepublico/78527}, url = {https://doi.org/10.17185/duepublico/78527}, language = {en} } @inproceedings{ubo_mods_00233627, author = {Ma, Yuan and Donkers, Tim and Kleemann, Timm and Ziegler, Jürgen}, editor = {Anelli, Vito and Basile, Pierpaolo and De Melo, Gerard}, title = {Meta-Intents in Conversational Recommender Systems}, booktitle = {Proceedings of the Fourth Knowledge-aware and Conversational Recommender Systems Workshop co-located with 16th ACM Conference on Recommender Systems (RecSys 2022)}, series = {CEUR Workshop Proceedings}, year = {2022}, publisher = {RWTH Aachen}, address = {Aachen}, volume = {3294}, pages = {81–90}, issn = {1613-0073}, url = {https://ceur-ws.org/Vol-3294/long6.pdf}, language = {en} } @inproceedings{ubo_mods_00193170, author = {Hermann, Julia and Plückthun, Moritz and Dogangün, Aysegül and Hesenius, Marc}, title = {User-Defined Gesture and Voice Control in Human-Drone Interaction for Police Operations}, booktitle = {Nordic Human-Computer Interaction Conference}, series = {ACM Other conferences}, year = {2022}, publisher = {Association for Computing Machinery}, address = {New York}, keywords = {Drones; Gesture Control; Human-Drone Interaction; Natural User Interfaces; Police; UAVs; User centered; User-Defined; Voice Control}, isbn = {9781450396998}, doi = {10.1145/3546155}, url = {https://doi.org/10.1145/3546155.3546661}, language = {en} } @phdthesis{ubo_mods_00201681, author = {Stegemann, Timo}, title = {Ein System zur Präsentation und Visualisierung von Linked Open Data in Webseiten mittels Semantic Data Widgets}, year = {2022}, address = {Duisburg, Essen}, keywords = {Linked Data}, abstract = {The amount of publicly available linked data has been growing steadily since the beginning of the Semantic Web at the start of the 21st century. With over 200 billion relations, the Linked Open Data Cloud, in which various data sets are gleaned, comprises an inconceivable treasure trove of knowledge that can be freely accessed by every Internet user. However, even though this data is "public" and "free", this does not mean that it can also be used by everyone. The enormous complexity of the technologies, applications and formats required for using this data, prevents the majority of Internet users from participating in this knowledge. This dissertation addresses the aforementioned problem and describes the Semwidg tool suite. Its goal is to provide easy access to this data, at least for users with knowledge of web technologies but without expertise in Linked Data, and thus to promote multiple use (Content-Syndication) of Linked Data content. Semwidg is a system for presenting and visualizing Linked Open Data in web pages using Semantic Data Widgets. These widgets encapsulate database queries and presentation-relevant information needed to retrieve data from the Linked Open Data Cloud, process it, and then display it within web pages. Semwidg consists of the three subcomponents SemwidgQL, SemwidgJS and SemwidgED. SemwidgQL is an easy-to-learn path query language that is adapted to the background knowledge of web developers and programmers in terms of its syntax and semantics. It can be transcompiled on the client-side into SPARQL, the de facto standard query language of Linked Data content. Based on two studies, it has been shown that SemwidgQL is easier to learn than SPARQL and can be used effectively and efficiently. SemwidgJS is a JavaScript widget library for presenting and visualizing Linked Data in web pages. It provides the usual web UI elements for output and input, as well as charts and maps, through a set of predefined widget classes. The widgets can exchange data with each other, allowing interactive web pages to be created. Furthermore, SemwidgJS is a framework that allows to define custom widget classes with just a few lines of JavaScript code. SemwidgED is an online WYSIWYG editor that supports users in embedding SemwidgJS widgets in web pages and formulating SemwidgQL queries. The usability of SemwidgED was evaluated in an empirical user study with respect to effectiveness, efficiency and user satisfaction. SemwidgED achieved very good results within the relevant target group.}, school = {University of Duisburg-Essen}, doi = {10.17185/duepublico/77037}, url = {https://doi.org/10.17185/duepublico/77037}, language = {de} } @phdthesis{ubo_mods_00198640, author = {Kunkel, Johannes}, title = {Mental Models, Explanations, Visualizations: Promoting User-Centered Qualities in Recommender Systems}, year = {2022}, address = {Duisburg, Essen}, keywords = {Recommender Systems}, abstract = {Recommender systems (RSs) are powerful tools that proactively suggest a set of personalized items to users. In doing so, they aim to predict the preferences of their users, wherein they are considered to be very accurate. In addition to algorithmic precision, user-centered qualities have recently been increasingly taken into account when evaluating the success of RSs. Examples for such qualities include the transparency of an RS, the control users are able to exert over their recommendations, and the means of exploring the item space in context of recommendations. However, research on aspects focused on human-computer interaction in RSs is still at a rather early stage. The main focus of the present thesis is to study and design RSs more holistically. In this regard, the mental models that users create of RSs are explored, explanations and their impact on user-centered variables of RSs are investigated, and techniques from information visualization (InfoVis) are applied to let users scrutinize the global context of their recommendations. The results of this research and the contributions I make to the state of the art in this context are described in greater detail below. A key contribution of this thesis consists of the results of two studies that shed light on the mental models that users of RSs develop and how these models influence the users’ perception of different system qualities. A key finding of the first, qualitative study is that many mental models tend to follow a procedural structure that can be used, for instance, as a template for designing explanations to promote transparency in RSs. In the second study, which relied on a larger sample and thus allowed quantitative conclusions, this type of procedurally structured mental models was found to correlate with a high perception of system transparency and confidence in the users’ own comprehension of the inner workings of the system. Apart from that, some users seemed to humanize the RS, assigning attributes such as “social”, “organic”, and “empathic”. Such a comprehension of the system was accompanied by higher levels of trust—a finding that may be leveraged by system designers. In general, mental models that deviate greatly from the actual functioning of the system should be corrected so that they do not lead to false expectations on the part of the users and hence to a potentially rejection of recommendations. A prominent method for improving system transparency and thus the soundness of users’ mental models is to provide textual explanations along with the recommendations. These explanations usually follow a very simple scheme based on similarity—especially in productive environments. To investigate implications of such simple explanations, another experiment contained in this thesis asked users to explain recommendations in their own words and compared them to explanations automatically generated by a system. The results indicate many benefits of providing more extensive explanations for recommendations, such as increased trust and higher perceived quality of recommendations. Another finding is that many participants, as opposed to the system, provided a broader context of the decision behind their recommendation. The extent to which textual explanations can provide context for recommendations is limited,though. While a local context is relatively easy to explain textually—e.g. by linking recommendations to a user’s preferences—it is difficult, if not impossible, to provide users with a global context. Such a global context would need to explain the relationship of recommendations to all other items in the dataset from which a RS selects its candidates. Comprehending such an item space at a global scale can unlock several beneficial properties of an RS, such as preventing filter bubbles, fostering creativity, and encouraging a user’s self-development. In this thesis, I argue that to provide such a global context, RSs should go beyond explaining recommendations textually and better exploit the capabilities of computer systems compared to humans. Three of the six papers included in this cumulative dissertation explore how methods of InfoVis can be applied to RSs to provide users with a global context of recommendations and how this affects the users’ perception of these systems. One result of these studies is that even simple means of representing the item space can already successfully convey a sense of overview over the item space and provide transparency for recommendations. However, another finding is that artificial maps that distribute all items on a two-dimensional plane according to their similarity are a promising visualization style that can be used to deeply integrate means of interactively controlling recommendations into the visualization of the item space. Such maps have also been found to trigger user excitement, which can also influence the perception of recommendations. In another experiment, we found that a treemap can also be used as a control panel for a RSs. The results of this experiment further underline that treemaps can effectively alert their users to potential biases or blind spots in their preference profile. In this thesis, I discuss such implications of the InfoVis method to depict the item space of RSs. Finally, in this thesis I take an elevated perspective on the findings of the papers contained and argue that researchers should consider user-centered aspects of RSs more holistically, for instance, in terms of the deep interconnectedness of perceptual variables. In this sense, I observed that the user experience of an application can influence as how novel recommendations are perceived to be, and that the degree of overview of the item space users are able to obtain can positively affect the perceived quality of recommendations. This thesis represents thus a further argument for looking at RSs from a highly user-centered viewpoint.}, school = {University of Duisburg-Essen}, doi = {10.17185/duepublico/78167}, url = {https://doi.org/10.17185/duepublico/78167}, language = {en} } @inproceedings{ubo_mods_00191812, author = {Torkamaan, Helma and Ziegler, Jürgen}, title = {Recommendations as Challenges: Estimating Required Effort and User Ability for Health Behavior Change Recommendations}, booktitle = {27th International Conference on Intelligent User Interfaces}, series = {ACM Conferences}, year = {2022}, publisher = {Association for Computing Machinery}, address = {New York,NY,United States}, pages = {106–119}, keywords = {Ability; Behavior change; Difficulty; Elo; Glicko-2; Health recommender systems; Personalization; Rasch; TrueSkill}, isbn = {9781450391443}, doi = {10.1145/3490099}, url = {https://doi.org/10.1145/3490099.3511118}, language = {en} } @inproceedings{ubo_mods_00191514, author = {Loepp, Benedikt}, title = {Recommender Systems Alone Are Not Everything: Towards a Broader Perspective in the Evaluation of Recommender Systems}, booktitle = {PERSPECTIVES ’22: Proceedings of the 2nd Workshop on Perspectives on the Evaluation of Recommender Systems}, year = {2022}, abstract = {Thus far, in most of the user experiments conducted in the area of recommender systems, the respective system is considered as an isolated component, i.e., participants can only interact with the recommender that is under investigation. This fails to recognize the situation of users in real-world settings, where the recommender usually represents only one part of a greater system, with many other options for users to find suitable items than using the mechanisms that are part of the recommender, e.g., liking, rating, or critiquing. For example, in current web applications, users can often choose from a wide range of decision aids, from text-based search over faceted filtering to intelligent conversational agents. This variety of methods, which may equally support users in their decision making, raises the question of whether the current practice in recommender evaluation is sufficient to fully capture the user experience. In this position paper, we discuss the need to take a broader perspective in future evaluations of recommender systems, and raise awareness for evaluation methods which we think may help to achieve this goal, but have not yet gained the attention they deserve.}, url = {http://ceur-ws.org/Vol-3228/paper5.pdf} } @inproceedings{ubo_mods_00191230, author = {Ma, Yuan and Kleemann, Timm and Ziegler, Jürgen}, editor = {}, title = {Psychological User Characteristics and Meta-Intents in a Conversational Product Advisor}, booktitle = {Proceedings of the 9th Joint Workshop on Interfaces and Human Decision Making for Recommender Systems}, series = {CEUR Workshop Proceedings}, year = {2022}, publisher = {}, address = {}, volume = {3222}, pages = {18–32}, keywords = {conversational UI design, interactive behavior analysis, decision making, influence of psychological factors on interaction}, abstract = {We present a study investigating psychological characteristics of users of a GUI-style conversational recommender system in a real-world application case. We collected data of 496 customers of an online shop using a conversational product advisor (CPA), using questionnaire responses concerning decision- making style and a set of meta-intents, a concept we propose to represent high-level user preferences related to the decision process in a CPA. We also analyzed anonymized data on users’ interactions in the CPA. Concerning general decision-making style, we could identify two clusters of users who differ in their scores on scales measuring rational and intuitive decision-making. We found evidence that rationality and intuitiveness scores are differently correlated with the proposed meta-intents such as efficiency orientation, interest in detail, and openness for guidance. Relations with interaction data could be observed between rationality/intuitiveness scores and overall time spent in the CPA. Trying to classify users’ decision style from their interactions, however did not yield positive results. Despite the limitation that only a single CPA was studied in a single domain, our results provide evidence that the proposed meta-intents are linked to the general decision-making style of a user and can thus be instrumental in translating general decision-making factors into more concrete design guidance for CPA and their potential personalization.}, issn = {1613-0073}, url = {http://ceur-ws.org/Vol-3222/paper2.pdf}, language = {en} } @inproceedings{ma2022kars, year = {2022}, title = {Meta-Intents in Conversational Recommender Systems}, abstract = {We present a study investigating the psychological characteristics of users and their conversation-related preferences in a conversational recommender system (CRS). We collected data from 260 participants on Prolific, using questionnaire responses concerning decision-making style, conversation-related feature preferences in the smartphone domain, and a set of meta- intents, a concept we propose to represent high-level user preferences related to the interaction and decision-making in CRS. We investigated the relationship between users’ decision-making style, meta-intents and feature preferences through Structural Equation Modeling. We find that decision-making style has a significant influence on meta-intents as well as on feature preferences, however, meta-intents do not have a mediating effect between these two factors, indicating that meta-intents are independent of item feature preferences and may thus be generalizable, domain-independent concepts. Our results provide evidence that the proposed meta-intents are linked to the general decision-making style of a user and can thus be instrumental in translating general decision-making factors into more concrete design guidance for CRS and their potential personalization. As meta-intents seem to be domain-independent factors, we assume meta-intents do not affect users’ various interests in concrete product features and mainly reflect users’ general decision-support needs and interaction preferences in CRS.}, booktitle = {Proceedings of the 4th Edition of Knowledge-aware and Conversational Recommender Systems (KaRS) Workshop @ RecSys 2022}, author = {Yuan, Ma and Donkers, Tim and Kleemann, Timm and Jürgen, Ziegler} } @inproceedings{ubo_mods_00185435, author = {Kleemann, Timm and Loepp, Benedikt and Ziegler, Jürgen}, publisher = {ACM}, address = {New York, NY, USA}, title = {Towards Multi-Method Support for Product Search and Recommending}, booktitle = {Adjunct Proceedings of the 30th ACM Conference on User Modeling, Adaptation and Personalization (UMAP ’22)}, year = {2022}, pages = {74–79}, keywords = {Decision aids; Faceted filtering; Conversational recommender systems; Product advisors; Chatbots; Recommender systems; Search interfaces}, isbn = {978-1-4503-9232-7}, doi = {10.1145/3511047}, url = {https://dl.acm.org/doi/10.1145/3511047.3536408?cid=87958660357}, abstract = {Today, online shops offer a variety of components to support users in finding suitable items, ranging from filters and recommendations to conversational advisors and natural language chatbots. All these methods differ in terms of cognitive load and interaction effort, and, in particular, in their suitability for the specific user. However, it is often difficult for users to determine which method to use to reach their goal. Moreover, as the settings are not propagated between the methods, there is a lack of support for switching components. In this paper, we study the reasons for using the different components in more detail and present an initial proposal for a multi-method approach that provides a more seamless experience, allowing users to freely and flexibly choose from all available methods at any time.} } @phdthesis{ubo_mods_00184619, author = {Torkamaan, Helma}, title = {Health Recommender Systems for Mental Health Promotion}, year = {2022}, address = {Duisburg, Essen}, keywords = {Health recommender systems; Mobile health; Mental health promotion; Mood; Stress; Mood Tracking}, abstract = {Recommender systems are today an essential part of software applications used in everyday life and facilitate the decision-making process for users by personalizing the options from which they can choose. An emerging and rapidly growing application domain for these systems is health care, and the majority of research contributions related to health recommender systems are about preventive health care. However, some crucial areas in this domain have been mostly overlooked. One such area is mental health promotion, which, despite its critical importance, has a relatively negligible share in existing solutions and research. User stress and mood are fundamental concepts in preventive health care, and proper skills for coping with stress and improving mood are crucial for individual mental well-being, which is the central theme of this dissertation. Health recommender systems have high potential benefits in personalizing health-related recommendations and, especially, engaging users in behavior change processes. A health recommender system for health promotion and behavior change is a holistic system that, ideally, uses techniques from ubiquitous computing to provide pervasive health. Building a health recommender system, therefore, is a multidisciplinary effort that engages various areas, which we summarize as tracking, interacting, and personalizing components, and address them in this dissertation regarding our recommendation domain, stress reduction. In particular, we discuss three major contributions to the problem of building health recommender systems for stress reduction and mood improvement: (1) establishing proper ways to track user mood; (2) building one of the first interactive mobile health recommender system research platforms and providing an extensive holistic dataset for flexible investigation of health recommender systems in the future; and (3) developing dynamic mood and health-aware, user-engaging algorithms and carefully comparing the performance and characteristics of the presented techniques. These contributions were the result of various mixed and longitudinal user studies which engaged with more than 2,500 users. This dissertation brings together for the first time various aspects of user decision-making - such as explicit short-term preferences, health needs, and long-term goals - for a holistic health-aware recommender system. By thoroughly discussing various components, this dissertation presents a roadmap for building health recommender systems, and interactive, mood-aware, and mental health-promoting systems in the future.}, school = {University of Duisburg-Essen}, doi = {10.17185/duepublico/76050}, url = {https://doi.org/10.17185/duepublico/76050} } @inproceedings{ubo_mods_00181315, author = {Hellmann, Marco and Hernandez Bocanegra, Diana and Ziegler, Jürgen}, editor = {Smith-Renner, Alison and Amir, Ofra}, title = {Development of an Instrument for Measuring Users’ Perception of Transparency in Recommender Systems}, booktitle = {Workshops at the International Conference on Intelligent User Interfaces (IUI) 2022: Proceedings of the IUI 2022 Workshops: APEx-UI, HAI-GEN, HEALTHI, HUMANIZE, TExSS, SOCIALIZE}, series = {CEUR Workshop Proceedings}, year = {2022}, publisher = {RWTH Aachen}, address = {Aachen}, volume = {3124}, pages = {156–165}, keywords = {Recommender systems}, abstract = {Transparency is increasingly seen as a critical requirement for achieving the goal of human-centered AI systems in general and also, specifically, recommender systems (RS). However, defining and operationalizing the concept is still difficult, due to its multi-faceted nature. Currently, there are hardly any measurement instruments to adequately assess the perceived transparency of RS in user studies. Thus, we present the development of a measurement instrument that aims at capturing perceived transparency as a multidimensional construct. The results of our validation show that transparency can be distinguished with respect to input (what data does the system use?), functionality (how and why is an item recommended?), output (why and how well does an item fit one’s preferences?), and interaction (what needs to be changed for a different prediction?). The study is intended as a first iteration in the development of a reliable and fully validated measurement tool for assessing transparency in RS.}, issn = {1613-0073}, doi = {10.17185/duepublico/75905}, url = {https://doi.org/10.17185/duepublico/75905}, language = {en} } @phdthesis{ubo_mods_00181111, author = {Hernandez Bocanegra, Diana Carolina}, title = {Argumentative Explanations for Recommendations Based on Reviews}, year = {2022}, address = {Duisburg, Essen}, keywords = {Recommender systems, Explanations, Argumentation, Interactive interfaces design, Conversational agent, Dataset, Empirical studies}, abstract = {Recommender systems (RS) assist users in making decisions on a wide range of tasks, while preventing them from being overwhelmed by enormous amounts of choices. RS prevalence is such that many users of information-based technologies interact with them on a daily basis. However, many of these systems are still perceived as black boxes by users, who often have no way of seeing or requesting the reasons why certain items are recommended, potentially leading to negative attitudes towards RS by users. Providing explanations in RS can bring several advantages for users’ decision making and overall user experience. Although different explanatory approaches have been proposed so far, the general lack of user evaluation, and validation of concepts and implementations of explainable methods in RS, have left open many questions, related to how such explanations should be structured and presented. Also, while explanations in RS have so far been presented mostly in a static and non-interactive manner, limited work in explainable artificial intelligence have emerged addressing interactive explanations, enabling users to examine in detail system decisions. However, little is known about how interactive interfaces in RS should be conceptualized and designed, so that explanatory aims such as transparency and trust are met. This dissertation investigates interactive, conversational explanations that enable users to freely explore explanatory content at will. Our work is grounded on RS explainable methods that exploit user reviews, and inspired by dialog models and formal argument structures. Following a user-centered approach, this dissertation proposes an interface design for explanations as interactive argumentation, which was empirically validated through different user studies. To this end, we implemented a RS able to provide explanations both through a graphical user interface (GUI) navigation and a natural language interface. The latter consists of a conversational agent for explainable RS, which supports conversation flows for different types of questions written by users in their own words. To this end, we formulated a model to facilitate the detection of the intent expressed by a user on a question, and collected and annotated a dataset helpful for intent detection, which can facilitate the development of explanatory dialog systems in RS. The results reported in this dissertation indicate that providing interactive explanations through a conversation, i.e. an exchange of questions and answers between the user and the system, using both GUI-navigation or natural language conversation, can positively impact users evaluation of explanation quality and of the system, in terms of explanatory aims like transparency, and trust.}, school = {University of Duisburg-Essen}, doi = {10.17185/duepublico/75833}, url = {https://doi.org/10.17185/duepublico/75833} } @inproceedings{ubo_mods_00189158, author = {Wang, Chunpai and Sahebi, Shaghayegh and Torkamaan, Helma}, editor = {He, Jing and Unland, Rainer and Santos Jr., Eugene and Tao, Xiaohui and Purohit, Hemant and van den Heuvel, Willem-Jan and Yearwood, John and Cao, Jie}, title = {STRETCH: Stress and Behavior Modeling with Tensor Decomposition of Heterogeneous Data}, booktitle = {WI-IAT ’21: IEEE/WIC/ACM International Conference on Web Intelligence and Intelligent Agent Technology}, series = {ACM International Conference Proceeding Series}, year = {2021}, publisher = {Association for Computing Machinery}, address = {New York}, pages = {453–462}, keywords = {behavior modeling; stress management; tensor decomposition}, isbn = {978-1-4503-9115-3}, doi = {10.1145/3486622}, url = {https://doi.org/10.1145/3486622.3493967}, language = {en} } @inproceedings{ubo_mods_00170346, author = {Elahi, Mehdi and Abdollahpouri, Himan and Mansoury, Masoud and Torkamaan, Helma}, title = {Beyond Algorithmic Fairness in Recommender Systems}, booktitle = {UMAP ’21: Adjunct Proceedings of the 29th ACM Conference on User Modeling, Adaptation and Personalization}, year = {2021}, publisher = {Association for Computing Machinery}, pages = {41–46}, keywords = {evaluation; fairness; recommender systems}, isbn = {978-1-4503-8367-7}, doi = {10.1145/3450614.3461685}, url = {https://doi.org/10.1145/3450614.3461685}, language = {en} } @phdthesis{ubo_mods_00169467, author = {Naveed, Sidra}, title = {An Interactive Hybrid Approach to Generate Explainable and Controllable Recommendations}, year = {2021}, address = {Duisburg, Essen}, keywords = {Collaborative Filtering}, abstract = {Recently, the increasing complexity of Recommender Systems (RS) algorithms has led RS researchers to focus on improving user-centric aspects beyond algorithmic accuracy. In this context, explanations and opportunities for user control have been shown to increase overall system effectiveness and acceptance among RS users. In the RS literature, many attempts have been made to explain recommendations, mostly by exploiting ratings given by the user community for products or other objects (generally:items), in the context of Collaborative Filtering (CF), or by exploiting product features in Content-Based Filtering (CB). While these methods may suffice in simple recommendation scenarios, the complexity of other situations may require the use of several different data sources, for example depending on the product domain. To this end, hybrid systems combining the advantages of CF and CB techniques have been developed, but mainly to improve the algorithmic performance of RS. However, the relationship between recommended items and user preferences for product features has not been sufficiently exploited to generate explainable recommendations. Moreover, in most cases, item rating or re-rating is the only way for users to indicate their preferences and control the recommendation process. This thesis assumes that exploiting users’ feature preferences together with item ratings in a CF approach can generate more explainable recommendations and provide users with better opportunities to control the recommendation process which can be especially beneficial in complex domains such as digital cameras. From this starting point, this thesis first introduces the Feature-based Collaborative Filtering approach in the domain of digital cameras, which extends the conventional CF method by exploiting the feature preferences of similar users instead of item preferences with the goal of generating explainable recommendations. The first prototype implemented based on the approach was then empirically evaluated in two user studies. The results show that our novel approach is superior to conventional item-based CF in terms of subjective assessment of explanations, while a pure CB approach was perceived similarly positively. However, overall, participants appreciated the availability of extended explanations compared to conventional recommender approaches. Based on the findings of the user studies, we developed an extended version of the approach and implemented a prototype called Featuristic, in which we integrated interactive mechanisms into three main phases of the recommendation process: 1) Preference Elicitation, 2) Recommendations, and 3) Explanations – to improve explanation quality and user control. The Featuristic prototype was then evaluated in two user studies. The results showed that the implemented interactive mechanisms in several components of the recommendation process overall improved the explainability and controllability of RS compared to systems offering only non-interactive recommendations with limited or no explanations at all.}, school = {University of Duisburg-Essen}, doi = {10.17185/duepublico/75001}, url = {https://doi.org/10.17185/duepublico/75001} } @inproceedings{ubo_mods_00168133, author = {Torkamaan, Helma and Ziegler, Jürgen}, title = {Integrating Behavior Change and Persuasive Design Theories into an Example Mobile Health Recommender System}, booktitle = {UbiComp ’21: Adjunct Proceedings of the 2021 ACM International Joint Conference on Pervasive and Ubiquitous Computing and Proceedings of the 2021 ACM International Symposium on Wearable Computers}, year = {2021}, publisher = {Association for Computing Machinery}, address = {New York}, pages = {218–225}, keywords = {Behavior Change; Health recommender systems; Persuasive Design}, isbn = {978-1-4503-8461-2}, doi = {10.1145/3460418}, url = {https://doi.org/10.1145/3460418.3479330}, language = {en} } @inproceedings{ubo_mods_00168064, author = {Hernandez-Bocanegra, Diana Carolina and Ziegler, Jürgen}, title = {ConvEx-DS: A Dataset for Conversational Explanations in Recommender Systems}, booktitle = {Interfaces and Human Decision Making for Recommender Systems 2021: Proceedings of the 8th Joint Workshop on Interfaces and Human Decision Making for Recommender Systems}, series = {CEUR Workshop Proceedings}, year = {2021}, publisher = {CEUR-WS}, address = {Aachen}, volume = {2948}, pages = {3–20}, keywords = {Conversational agent; Dataset; Explanations; Recommender systems; User study}, issn = {1613-0073}, language = {en} } @inproceedings{ubo_mods_00168051, author = {Donkers, Tim and Ziegler, Jürgen}, title = {The Dual Echo Chamber: Modeling Social Media Polarization for Interventional Recommending}, booktitle = {Fifteenth ACM Conference on Recommender Systems}, year = {2021}, publisher = {Association for Computing Machinery, Inc}, address = {New York}, pages = {12–22}, keywords = {Agent-based modeling; Knowledge graphs; Machine learning; Recommender systems}, isbn = {9781450384582}, doi = {10.1145/3460231.3474261}, url = {https://doi.org/10.1145/3460231.3474261}, language = {en} } @inproceedings{ubo_mods_00167910, author = {Kunkel, Johannes and Ngo, Phuong Thao and Ziegler, Jürgen and Krämer, Nicole}, editor = {Ardito, Carmelo and Lanzilotti, Rosa and Malizia, Alessio and Petrie, Helen and Piccinno, Antonio and Desolda, Giuseppe and Inkpen, Kori}, title = {Identifying Group-Specific Mental Models of Recommender Systems: A Novel Quantitative Approach}, booktitle = {Human-Computer Interaction – INTERACT 2021: Proceedings, Part IV}, series = {Lecture Notes in Computer Science}, year = {2021}, publisher = {Springer}, address = {Cham}, volume = {12935}, pages = {383–404}, keywords = {Card sorting; Hierarchical clustering; Mental models; Recommender systems; Transparency}, isbn = {978-3-030-85609-0}, doi = {10.1007/978-3-030-85610-6_23}, url = {https://doi.org/10.1007/978-3-030-85610-6_23}, language = {en} } @inproceedings{ubo_mods_00167903, author = {Hernandez Bocanegra, Diana Carolina and Ziegler, Jürgen}, editor = {Ardito, Carmelo and Lanzilotti, Rosa and Malizia, Alessio and Petrie, Helen and Piccinno, Antonio and Desolda, Giuseppe and Inkpen, Kori}, title = {Effects of Interactivity and Presentation on Review-Based Explanations for Recommendations}, booktitle = {Human-Computer Interaction – INTERACT 2021: Proceedings, Part II}, series = {Lecture Notes in Computer Science}, year = {2021}, publisher = {Springer}, address = {Cham}, volume = {12933}, pages = {597–618}, keywords = {Explanations; Interactivity; Recommender systems; User characteristics; User study}, abstract = {User reviews have become an important source for recommending and explaining products or services. Particularly, providing explanations based on user reviews may improve users’ perception of a recommender system (RS). However, little is known about how review-based explanations can be effectively and efficiently presented to users of RS. We investigate the potential of interactive explanations in review-based RS in the domain of hotels, and propose an explanation scheme inspired by dialogue models and formal argument structures. Additionally, we also address the combined effect of interactivity and different presentation styles (i.e. using only text, a bar chart or a table), as well as the influence that different user characteristics might have on users’ perception of the system and its explanations. To such effect, we implemented a review-based RS using a matrix factorization explanatory method, and conducted a user study. Our results show that providing more interactive explanations in review-based RS has a significant positive influence on the perception of explanation quality, effectiveness and trust in the system by users, and that user characteristics such as rational decision-making style and social awareness also have a significant influence on this perception.}, isbn = {978-3-030-85615-1}, doi = {10.1007/978-3-030-85616-8_35}, url = {https://doi.org/10.1007/978-3-030-85616-8_35}, language = {en} } @inproceedings{ubo_mods_00167803, author = {Ma, Yuan and Kleemann, Timm and Ziegler, Jürgen}, title = {Mixed-Modality Interaction in Conversational Recommender Systems}, booktitle = {Proceedings of the 8th Joint Workshop on Interfaces and Human Decision Making for Recommender Systems}, series = {CEUR Workshop Proceedings}, year = {2021}, publisher = {}, address = {}, volume = {2948}, pages = {21–37}, keywords = {Conversational Recommender Systems; User Interface; Preference Elicitation; Critique-based Recommendations}, abstract = {Recent advances in natural language processing have made modern chatbots and Conversational Recommender Systems (CRS) increasingly intelligent, enabling them to handle more complex user inputs. Still, the interaction with a CRS is often tedious and error-prone. Especially when using written text as the form of conversation, the interaction is often less efficient in comparison to conventional GUI- style interaction. To keep the flexibility and mixed-initiative style of language-based conversation while leveraging the efficiency and simplicity of interacting through graphical widgets, we investigate the de- sign space of integrating GUI elements into text-based conversations. While simple response buttons have already been used in chatbots, the full range of such mixed-modality interactions has not yet been investigated in existing research. We propose two design dimensions along which integrations can be defined and analyze their applicability for preference elicitation and for critiquing the CRS’s responses at different levels. We report a user study in which we investigated user preferences and perceived usability of different techniques based on video prototypes.}, note = {OA platinum}, issn = {1613-0073}, url = {http://ceur-ws.org/Vol-2948/paper2.pdf}, language = {en} } @inproceedings{ubo_mods_00167689, author = {Kleemann, Timm and Wagner, Magdalena and Loepp, Benedikt and Ziegler, Jürgen}, title = {Modeling User Interaction at the Convergence of Filtering Mechanisms, Recommender Algorithms and Advisory Components}, booktitle = {Mensch Und Computer 2021 – Tagungsband}, year = {2021}, publisher = {ACM}, address = {New York, NY, USA}, pages = {531–543}, keywords = {Human factors; User experience; User modeling; Search interfaces; Recommender systems}, isbn = {978-1-4503-8645-6}, doi = {10.1145/3473856}, url = {https://dl.acm.org/doi/10.1145/3473856.3473859?cid=87958660357}, language = {en}, abstract = {A variety of methods is used nowadays to reduce the complexity of product search on e-commerce platforms, allowing users, for example, to specify exactly the features a product should have, but also, just to follow the recommendations automatically generated by the system. While such decision aids are popular with system providers, research to date has mostly focused on individual methods rather than their combination. To close this gap, we propose to support users in choosing the right method for the current situation. As a first step, we report in this paper a user study with a fictitious online shop in which users were able to flexibly use filter mechanisms, rely on recommendations, or follow the guidance of a dialog-based product advisor. We show that from the analysis of the interaction behavior, a model can be derived that allows predicting which of these decision aids is most useful depending on the user’s situation, and how this is affected by demographics and personality.} } @inproceedings{ubo_mods_00167688, author = {Loepp, Benedikt}, title = {On the Convergence of Intelligent Decision Aids}, booktitle = {Mensch Und Computer 2021 – Workshopband}, year = {2021}, publisher = {Gesellschaft für Informatik e.V.}, address = {Bonn}, keywords = {Decision support; Human factors; Information filtering; Adaptive systems; Recommender systems; User experience; User modeling}, abstract = {On the one hand, users’ decision making in today’s web is supported in numerous ways, with mechanisms ranging from manual search over automated recommendation to intelligent advisors. The focus on algorithmic accuracy, however, is questioned more and more. On the other hand, although the boundaries between the mechanisms are blurred increasingly, research on user-related aspects is still conducted separately in each area. In this position paper, we present a research agenda for providing a more holistic solution, in which users are supported with the right decision aid at the right time depending on personal characteristics and situational needs.}, doi = {10.18420/muc2021-mci-ws02-371}, url = {https://doi.org/10.18420/muc2021-mci-ws02-371}, language = {en} } @inproceedings{ubo_mods_00167304, author = {Álvarez Márquez, Jesús Omar and Ziegler, Jürgen}, editor = {Ardito, Carmelo and Lanzilotti, Rosa and Malizia, Alessio and Petrie, Helen and Piccinno, Antonio and Desolda, Giuseppe and Inkpen, Kori}, title = {Acceptance of an AR-Based In-Store Shopping Advisor: The Impact of Psychological User Characteristics}, booktitle = {Human-Computer Interaction – INTERACT 2021: Proceedings, Part I}, series = {Lecture Notes in Computer Science}, year = {2021}, publisher = {Springer}, address = {Berlin}, volume = {12932}, pages = {457–479}, keywords = {Technology acceptance; Augmented reality; Retailing; Shopping advisors}, isbn = {978-3-030-85622-9}, doi = {10.1007/978-3-030-85623-6_28}, url = {https://doi.org/10.1007/978-3-030-85623-6_28}, language = {en}, abstract = {We present a study on the acceptance of augmented reality-based product comparison and recommending in a physical store context. An online study was performed, in which a working prototype for head-mounted displays, developed in previous research, was used to showcase the concept. The survey included questionnaires to assess shopping behavior, decision styles and propensity to adopt new technologies of the participants. A cluster analysis of these psychological traits reveals the existence of different types of customers, who also differ on their assessment of the system. While the technology adoption propensity index is the better predictor of the acceptance of an augmented reality shopping advisor, the results suggest that factors such as the user’s previous experience, a high experiential chronic shopping orientation, or an intuitive decision style have a significant impact on it as well. Thus, predicting user acceptance solely based on one of the investigated psychological traits may be unreliable, and studying them in conjunction can provide a more accurate estimation.} } @article{ubo_mods_00164527, author = {Murphy, Peter R. and Wilming, Niklas and Hernandez-Bocanegra, Diana Carolina and Prat-Ortega, Genis and Donner, Tobias H.}, title = {Adaptive Circuit Dynamics Across Human Cortex During Evidence Accumulation in Changing Environments}, journal = {Nature Neuroscience}, year = {2021}, publisher = {Springer Science and Business Media}, address = {New York}, pages = {in press}, note = {000644336900001}, issn = {1097-6256}, doi = {10.1038/s41593-021-00839-z}, url = {http://www.ncbi.nlm.nih.gov/pubmed/33903770}, language = {en} } @inproceedings{ubo_mods_00167074, author = {Hernandez-Bocanegra, Diana C. and Ziegler, Jürgen}, title = {Conversational Review-based Explanations for Recommender Systems: Exploring Users’ Query Behavior}, booktitle = {CUI 2021 - 3rd Conference on Conversational User Interfaces}, series = {ACM International Conference Proceeding Series}, year = {2021}, publisher = {Association for Computing Machinery (ACM)}, address = {New York}, keywords = {argumentation; conversational agent; explanations; Recommender systems; user study}, abstract = {Providing explanations based on user reviews in recommender systems (RS) can increase users’ perception of system transparency. While static explanations are dominant, interactive explanatory approaches have emerged in explainable artificial intelligence (XAI), so that users are more likely to examine system decisions and get more arguments supporting system assertions. However, little attention has been paid to conversational approaches for explanations targeting end users. In this paper we explore how to design a conversational interface to provide explanations in a review-based RS, and present the results of a Wizard of Oz (WoOz) study that provided insights into the type of questions users might ask in such a context, as well as their perception of a system simulating such a dialog. Consequently, we propose a dialog management policy and user intents for explainable review-based RS, taking as an example the hotels domain.}, isbn = {9781450389983}, doi = {10.1145/3469595.3469596}, url = {https://dl.acm.org/doi/10.1145/3469595.3469596?cid=99659550942}, language = {en} } @inproceedings{ubo_mods_00166333, author = {Herrmanny, Katja and Torkamaan, Helma}, editor = {Masthoff, Judith and Herder, Eelco and Tintarev, Nava and Tkalčič, Marko}, title = {Towards a User Integration Framework for Personal Health Decision Support and Recommender Systems}, booktitle = {Proceedings of the 29th ACM Conference on User Modeling, Adaptation and Personalization}, year = {2021}, publisher = {Association for Computing Machinery}, address = {New York}, pages = {65–76}, keywords = {Decision support system; Design framwork; Health recommender systems; User in the loop; User integration}, isbn = {978-1-4503-8366-0}, doi = {10.1145/3450613.3456816}, url = {https://doi.org/10.1145/3450613.3456816}, language = {en} } @phdthesis{ubo_mods_00164523, author = {Loepp, Benedikt}, title = {Interactive Methods for Model-based Collaborative Filtering Recommender Systems}, year = {2021}, address = {Duisburg, Essen}, keywords = {Recommender systems; Collaborative filtering; Interactive recommending; Matrix factorization; Empirical studies; User experience; User interfaces}, abstract = {Recommender systems have become very popular for reducing the information overload users are often confronted with in today’s web. Collaborative filtering is the method of choice for generating personalized recommendations, supporting users in finding items that best match their preferences, from news articles and movies to all kinds of consumer goods and services. Model-based techniques have achieved great success in terms of recommendation accuracy and algorithmic performance. While there is a large body of research on these aspects, only little effort has been spent on improving user control and experience. As a consequence, users of contemporary systems usually have no other option than rating single items to indicate their preferences and thus to influence the recommendations. In this thesis, we propose a set of interactive methods for model-based collaborative filtering recommender systems. With these methods, we aim at providing users richer possibilities to specify their preferences and to control the outcome of the systems according to situational needs. In general, users should be enabled to take a more active role throughout the process of finding suitable items. Guided by a structured model of user interaction, we first present a choice-based preference elicitation method. For systems that rely on matrix factorization, one of the most commonly applied techniques in the area of model-based collaborative filtering, this method provides an alternative to rating items in cold-start situations. Furthermore, we describe an algorithmic enhancement, content-boosted matrix factorization. Based on the additional item-related information that is considered by this method, we give several examples of advanced interactive features that allow users to control the recommendations in an even more expressive manner, also later in the process. Finally, we propose a concept called blended recommending. This concept is designed to merge model-based collaborative filtering with other established methods in a way that users can be supported also in complex scenarios with the full range of options they need to reach their search goal. All these methodological contributions are complemented by empirical evaluations. Overall, we conducted four user experiments with n=35, 46, 54 and 33 participants, respectively. The results underline that our methods can effectively be implemented in existing recommender systems in order to turn them into fully interactive, user-controlled applications. This is finally confirmed with the help of an integrated recommendation platform that demonstrates that all our developments can be combined with each other in a single holistic system.}, school = {University of Duisburg-Essen}, doi = {10.17185/duepublico/74289}, url = {https://doi.org/10.17185/duepublico/74289} } @inproceedings{ubo_mods_00209967, author = {Hernandez-Bocanegra, Diana C. and Borchert, Angela and Brünker, Felix and Shahi, Gautam Kishore and Ross, Björn}, title = {Towards a Better Understanding of Online Influence: Differences in Twitter Communication Between Companies and Influencers}, booktitle = {Proceedings of the 31st Australasian Conference on Information Systems (ACIS 2020)}, series = {ACIS 2020 Proceedings}, year = {2020}, publisher = {Association for Information Systems (AIS)}, address = {Atlanta}, volume = {18}, keywords = {Online Influence; Social Impact Theory; Social Media; Twitter}, abstract = {In the last decade, Social Media platforms such as Twitter have gained importance in the various marketing strategies of companies. This work aims to examine the presence of influential content on a textual level, by investigating characteristics of tweets in the context of social impact theory, and its dimension immediacy. To this end, we analysed influential Twitter communication data during Black Friday 2018 with methods from social media analytics such as sentiment analysis and degree centrality. Results show significant differences in communication style between companies and influencers. Companies published longer textual content and created more tweets with a positive sentiment and more first-person pronouns than influencers. These findings shall serve as a basis for a future experimental study to examine the impact of text presence on consumer cognition and the willingness to purchase.}, url = {https://aisel.aisnet.org/acis2020/18/}, language = {en} } @inproceedings{ubo_mods_00166665, author = {Hernandez Bocanegra, Diana Carolina and Borchert, Angela and Brünker, Felix and Shahi, Gautam Kishore and Ross, Björn}, title = {Towards a Better Understanding of Online Influence: Differences in Twitter Communication Between Companies and Influencers}, booktitle = {ACIS 2020 Proceedings}, series = {ACIS 2020 Proceedings}, year = {2020}, volume = {18}, keywords = {Online influence}, abstract = {In the last decade, Social Media platforms such as Twitter have gained importance in the various marketing strategies of companies. This work aims to examine the presence of influential content on a textual level, by investigating characteristics of tweets in the context of social impact theory, and its dimension immediacy. To this end, we analysed influential Twitter communication data during Black Friday 2018 with methods from social media analytics such as sentiment analysis and degree centrality. Results show significant differences in communication style between companies and influencers. Companies published longer textual content and created more tweets with a positive sentiment and more first-person pronouns than influencers. These findings shall serve as a basis for a future experimental study to examine the impact of text presence on consumer cognition and the willingness to purchase.}, url = {https://aisel.aisnet.org/acis2020/18/}, language = {en} } @inproceedings{ubo_mods_00166661, author = {Hernandez Bocanegra, Diana Carolina and Ziegler, Jürgen}, editor = {Hansen, C. and Nürnberger, A. and Preim, B.}, title = {Argumentative explanations for recommendations - Effect of display style and profile transparency}, booktitle = {Mensch und Computer 2020}, year = {2020}, keywords = {Recommender systems, explanations, user study}, abstract = {Providing explanations based on user reviews in recommender systems may increase users’ perception of transparency. However, little is known about how these explanations should be presented to users in order to increase both their understanding and acceptance. We present in this paper a user study to investigate the effect of different display styles (visual and text only) on the perception of review-based explanations for recommended hotels. Additionally, we also aim to test the differences in users’ perception when providing information about their own profiles, in addition to a summarized view on the opinions of other users about the recommended hotel. Our results suggest that the perception of explanations regarding these aspects may vary depending on user characteristics, such as decision-making styles or social awareness.}, doi = {10.18420/muc2020-ws111-338}, url = {https://doi.org/10.18420/muc2020-ws111-338}, language = {en} } @article{ubo_mods_00161373, author = {Hernandez-Bocanegra, Diana C. and Ziegler, Jürgen}, title = {Explaining Review-Based Recommendations: Effects of Profile Transparency, Presentation Style and User Characteristics}, journal = {i-com: Journal of Interactive Media}, year = {2020}, publisher = {de Gruyter}, address = {Berlin}, volume = {19}, number = {3}, pages = {181–200}, keywords = {user study}, abstract = {Providing explanations based on user reviews in recommender systems (RS) may increase users’ perception of transparency or effectiveness. However, little is known about how these explanations should be presented to users, or which types of user interface components should be included in explanations, in order to increase both their comprehensibility and acceptance. To investigate such matters, we conducted two experiments and evaluated the differences in users’ perception when providing information about their own profiles, in addition to a summarized view on the opinions of other customers about the recommended hotel. Additionally, we also aimed to test the effect of different display styles (bar chart and table) on the perception of review-based explanations for recommended hotels, as well as how useful users find different explanatory interface components. Our results suggest that the perception of an RS and its explanations given profile transparency and different presentation styles, may vary depending on individual differences on user characteristics, such as decision-making styles, social awareness, or visualization familiarity.}, issn = {2196-6826}, doi = {10.1515/icom-2020-0021} } @article{ubo_mods_00160743, author = {Koch, Michael and Ziegler, Jürgen and Reuter, Christian and Schlegel, Thomas and Prilla, Michael}, title = {Mensch-Computer-Interaktion als zentrales Gebiet der Informatik: Bestandsaufnahme, Trends und Herausforderungen}, journal = {Informatik Spektrum}, year = {2020}, publisher = {Springer}, address = {Berlin}, volume = {43}, pages = {381–387}, keywords = {Mensch-Computer-Interaktion}, issn = {1432-122X}, doi = {10.1007/s00287-020-01299-8} } @incollection{ubo_mods_00160728, author = {Ziegler, Jürgen and Loepp, Benedikt}, title = {Empfehlungssysteme}, booktitle = {Handbuch Digitale Wirtschaft}, year = {2020}, publisher = {Springer Gabler}, address = {Wiesbaden, Germany}, pages = {717–741}, keywords = {Empfehlungen; Personalisierung; E-Commerce; Recommender Systems; Collaborative Filtering; Usability}, isbn = {978-3-658-17290-9}, doi = {10.1007/978-3-658-17291-6_52}, url = {https://link.springer.com/chapter/10.1007%2F978-3-658-17291-6_52}, editor = {Kollmann, Tobias}, abstract = {Empfehlungssysteme stellen heute eine zentrale Komponente vieler Online-Plattformen dar, die bei Online-Shops und vielen anderen Anwendungen häufig zum Einsatz kommt. Ziel ist es, dem Kunden entsprechend seinen persönlichen Präferenzen Produkte oder andere Artikel vorzuschlagen, die für ihn von Interesse sind und potenziell zu einem Kauf oder generell zur Nutzung führen. Empfehlungssysteme haben eine erhebliche wirtschaftliche Bedeutung, da sie in vielen Fällen zu einem signifikanten Anteil zu Erfolgsfaktoren wie Click-through-Raten oder Käufen beitragen. Wir stellen in diesem Kapitel die unterschiedlichen Ansätze zur automatisierten Empfehlungsgebung vor und beschreiben konkrete Techniken zu deren Umsetzung. Weiterhin gehen wir auf wesentliche Aspekte der Gestaltung und Bewertung von Empfehlungssystemen ein und diskutieren anwenderrelevante Themen wie Usability und Vertrauen in systemgenerierte Empfehlungen.} } @article{ubo_mods_00159948, author = {Torkamaan, Helma and Ziegler, Jürgen}, title = {Mobile mood tracking: An investigation of concise and adaptive measurement instruments}, journal = {Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies}, year = {2020}, publisher = {Association for Computing Machinery}, volume = {4}, number = {4}, pages = {155}, keywords = {User Compliance}, issn = {2474-9567}, doi = {10.1145/3432207} } @inproceedings{ubo_mods_00157832, author = {Álvarez Márquez, Jesús Omar and Ziegler, Jürgen}, title = {In-Store Augmented Reality-Enabled Product Comparison and Recommendation}, booktitle = {14th ACM Conference on Recommender Systems}, year = {2020}, publisher = {Association for Computing Machinery (ACM)}, address = {New York}, pages = {180–189}, keywords = {recommender systems}, isbn = {9781450375832}, doi = {10.1145/3383313.3412266}, abstract = {We present an approach combining the AR-based presentation of product attributes in a physical retail store with recommendations for items only available online. The system supports users’ decision-making process by offering functions for comparing product features between items, both physical and online, and by providing recommendations based on selecting in-store products. The physical products may thus serve as anchors for forming the user’s preferences, also offering a richer and more engaging experience when exploring the products hands-on. Both objective product attributes as well as the visual appearance of a physical product are employed for generating recommendations from the online space. In this way, the advantages of online and in-store shopping can be combined, creating novel multi-channel opportunities for businesses. An empirical evaluation showed that the comparison and recommendation functions were appreciated by users, and hinted some possible benefits of a hybrid physical-online shopping support system. Despite the limitations of the study, there is sufficient evidence to consider this a viable approach worth to be further explored.} } @inproceedings{ubo_mods_00157986, author = {Naveed, Sidra and Ziegler, Jürgen}, title = {Featuristic: An interactive hybrid system for generating explainable recommendations – Beyond system accuracy}, booktitle = {Proceedings of the 7th Joint Workshop on Interfaces and Human Decision Making for Recommender Systems}, year = {2020}, pages = {14–25}, keywords = {User Experience}, issn = {1613-0073}, url = {http://ceur-ws.org/Vol-2682/paper2.pdf}, abstract = {Hybrid recommender systems (RS) have shown to improve system accuracy by combining benefits from the collaborative filtering (CF) and content-based (CB) approaches. Recently, the increasing complexity of such algorithms has fueled a demand for researchers to focus more on the user-oriented aspects such as explainability, user interaction, and control mechanisms. Even in cases, where explanations are provided, the systems mostly fall short in explaining the connection between the recommended items and users? preferred features. Additionally, in most cases, rating or re-evaluating items is typically the only option for users to specify or manipulate their preferences. With the purpose to provide advanced explanations, we implemented a prototype system called Featuristic, by applying a hybrid approach that uses content-features in a CF approach and exploits feature-based similarities. Addressing important user-oriented aspects, we have integrated interactive mechanisms into the system to improve both preference elicitation and preference manipulation. Besides, we have integrated explanations for the recommendations into these interactive mechanisms. We evaluated our prototype system in two user studies to investigate the impact of the interactive explanations on the user-oriented aspects. The results showed that the Featuristic System with interactive explanations have significantly improved users’ perception of the system in terms of the preference elicitation, explainability, and preference manipulation – compared to the systems that provide non-interactive explanations.} } @inproceedings{Torkamaan_2020_exploring, author = {Torkamaan, Helma and Ziegler, Jürgen}, title = {Exploring chatbot user interfaces for mood measurement: A study of validity and user experience}, booktitle = {Proceedings of the 2020 ACM International Joint Conference on Pervasive and Ubiquitous Computing and Proceedings of the 2020 ACM International Symposium on Wearable Computers}, year = {2020}, publisher = {Association for Computing Machinery (ACM)}, address = {New York}, pages = {135–138}, keywords = {PANAS}, abstract = {With the growth of interactive text or voice-enabled systems, such as intelligent personal assistants and chatbots, it is now possible to easily measure a user’s mood using a conversation-based interaction instead of traditional questionnaires. However, it is still unclear if such mood measurements would be valid, akin to traditional measures, and user-engaging. Using smartphones, we compare in this paper two of the most popular traditional measures of mood: International PANAS-Short Form (I-PANAS-SF) and Affect Grid. For each of these measures, we then investigate the validity of mood measurement with a modified, chatbot-based user interface design. Our preliminary results suggest that some mood measures may not be resilient to modifications and that their alteration could lead to invalid, if not meaningless results. This exploratory paper then presents and discusses four voice-based mood tracker designs and summarizes user perception of and satisfaction with these tools. \textcopyright 2020 Owner/Author.}, isbn = {9781450380768}, doi = {10.1145/3410530.3414395}, url = {https://dl.acm.org/doi/10.1145/3410530.3414395} } @inproceedings{ubo_mods_00156892, author = {Kleemann, Timm and Ziegler, Jürgen}, title = {Distribution sliders: Visualizing data distributions in range selection sliders}, booktitle = {Conference on "Mensch und Computer"}, series = {ACM International Conference Proceeding Series}, year = {2020}, publisher = {Association for Computing Machinery (ACM)}, address = {New York}, pages = {67–78}, isbn = {9781450375405}, doi = {10.1145/3404983.3405512}, abstract = {Sliders are often used to enable users to easily enter preferences for continuous data. Although efforts have already been made to enrich and improve these interaction tools with additional information and visualizations, only rather basic variants of sliders are commonly used in online shops or databases. However, these sliders often provide users only with very limited information about underlying data.We describe and evaluate three different slider designs, which enrich the tools with information in various ways, enabling users to efficiently explore the space of available items and to choose items in an informed manner. In one of the described slider designs we propose a new approach that integrates item recommendations directly into the slider, enabling users to see suitable items within the selection tool. In two user studies we show that these enhancements, both visualizations and recommendations, are powerful methods to directly support users in their searches.} } @article{ubo_mods_00154868, author = {Donkers, Tim and Ziegler, Jürgen}, title = {Leveraging Arguments in User Reviews for Generating and Explaining Recommendations}, journal = {Datenbank-Spektrum}, year = {2020}, publisher = {Springer}, address = {Berlin}, volume = {20}, number = {2}, pages = {181–187}, abstract = {Review texts constitute a valuable source for making system-generated recommendations both more accurate and more transparent. Reviews typically contain statements providing argumentative support for a given item rating that can be exploited to explain the recommended items in a personalized manner. We propose a novel method called Aspect-based Transparent Memories (ATM) to model user preferences with respect to relevant aspects and compare them to item properties to predict ratings, and, by the same mechanism, explain why an item is recommended. The ATM architecture consists of two neural memories that can be viewed as arrays of slots for storing information about users and items. The first memory component encodes representations of sentences composed by the target user while the second holds an equivalent representation for the target item based on statements of other users. An offline evaluation was performed with three datasets, showing advantages over two baselines, the well-established Matrix Factorization technique and a recent competitive representative of neural attentional recommender techniques.}, issn = {1618-2162}, doi = {10.1007/s13222-020-00350-y} } @inproceedings{ubo_mods_00154819, author = {Kunkel, Johannes and Schwenger, Claudia and Ziegler, Jürgen}, title = {NewsViz: Depicting and Controlling Preference Profiles Using Interactive Treemaps in News Recommender Systems}, booktitle = {UMAP 2020 - Proceedings of the 28th ACM Conference on User Modeling, Adaptation and Personalization}, year = {2020}, publisher = {Association for Computing Machinery (ACM)}, address = {New York}, pages = {126–135}, keywords = {treemaps}, abstract = {News articles are increasingly consumed digitally and recommender systems (RS) are widely used to personalize news feeds for their users. Thereby, particular concerns about possible biases arise. When RS filter news articles opaquely, they might "trap" their users in filter bubbles. Additionally, user preferences change frequently in the domain of news, which is challenging for automated RS. We argue that both issues can be mitigated by depicting an interactive version of the user’s preference profile inside an overview of the entire domain of news articles. To this end, we introduce NewsViz, a RS that visualizes the domain space of online news as treemap, which can interactively be manipulated to personalize a feed of suggested news articles. In a user study (N=63), we compared NewsViz to an interface based on sliders. While both prototypes yielded high results in terms of transparency, recommendation quality and user satisfaction, NewsViz outperformed its counterpart in the perceived degree of control. Structural equation modeling allows us to further uncover hitherto underestimated influences between quality aspects of RS. For instance, we found that the degree of overview of the item domain influenced the perceived quality of recommendations.}, isbn = {9781450368612}, doi = {10.1145/3340631.3394869} } @inproceedings{ubo_mods_00154820, author = {Ngo, Thao Phuong and Kunkel, Johannes and Ziegler, Jürgen}, title = {Exploring Mental Models for Transparent and Controllable Recommender Systems: A Qualitative Study}, booktitle = {UMAP 2020 - Proceedings of the 28th ACM Conference on User Modeling, Adaptation and Personalization}, year = {2020}, publisher = {Association for Computing Machinery (ACM)}, address = {New York}, pages = {183–191}, keywords = {transparent AI}, abstract = {While online content is personalized to an increasing degree, eg. using recommender systems (RS), the rationale behind personalization and how users can adjust it typically remains opaque. This was often observed to have negative effects on the user experience and perceived quality of RS. As a result, research increasingly has taken user-centric aspects such as transparency and control of a RS into account, when assessing its quality. However, we argue that too little of this research has investigated the users’ perception and understanding of RS in their entirety. In this paper, we explore the users’ mental models of RS. More specifically, we followed the qualitative grounded theory methodology and conducted 10 semi-structured face-to-face interviews with typical and regular Netflix users. During interviews participants expressed high levels of uncertainty and confusion about the RS in Netflix. Consequently, we found a broad range of different mental models. Nevertheless, we also identified a general structure underlying all of these models, consisting of four steps: data acquisition, inference of user profile, comparison of user profiles or items, and generation of recommendations. Based on our findings, we discuss implications to design more transparent, controllable, and user friendly RS in the future.}, isbn = {9781450368612}, doi = {10.1145/3340631.3394841} } @inproceedings{ubo_mods_00154785, author = {Naveed, Sidra and Loepp, Benedikt and Ziegler, Jürgen}, title = {On the Use of Feature-based Collaborative Explanations: An Empirical Comparison of Explanation Styles}, booktitle = {ExUM ’20: Proceedings of the International Workshop on Transparent Personalization Methods based on Heterogeneous Personal Data}, year = {2020}, publisher = {ACM}, address = {New York}, pages = {226–232}, keywords = {User Experience}, doi = {10.1145/3386392.3399303}, url = {https://dl.acm.org/doi/10.1145/3386392.3399303?cid=87958660357}, abstract = {Current attempts to explain recommendations mostly exploit a single type of data, i.e. usually either ratings provided by users for items in collaborative filtering systems, or item features in content-based systems. While this might be sufficient in straightforward recommendation scenarios, the complexity of other situations could require the use of multiple datasources, for instance, depending on the product domain. Even though hybrid systems have a long and successful history in recommender research, the connections between user ratings and item features have only rarely been used for offering more informative and transparent explanations. In previous work, we presented a prototype system based on a feature-weighting mechanism that constitutes an exception, allowing to recommend both items and features based on ratings while offering advanced explanations based on content data. In this paper, we empirically evaluate this prototype in terms of user-oriented aspects and user experience against to widely accepted baselines. Two user studies show that our novel approach outperforms conventional collaborative filtering, while a pure content-based system was perceived in a similarly positive light. Overall, the results draw a promising picture, which becomes particularly apparent from a user perspective when participants were specifically asked to use the explanations: they indicated in their qualitative feedback that they understood them and highly appreciated their availability.} } @inproceedings{ubo_mods_00154786, author = {Hernandez-Bocanegra, Diana C. and Donkers, Tim and Ziegler, Jürgen}, title = {Effects of Argumentative Explanation Types on the Perception of Review-Based Recommendations}, booktitle = {Adjunct Proceedings of the 28th ACM Conference on User Modeling, Adaptation and Personalization (UMAP ’20 Adjunct)}, year = {2020}, publisher = {Association for Computing Machinery (ACM)}, address = {New York}, pages = {219–225}, keywords = {user study}, abstract = {Recommender systems have achieved considerable maturity and accuracy in recent years. However, the rationale behind recommendations mostly remains opaque. Providing textual explanations based on user reviews may increase users’ perception of transparency and, by that, overall system satisfaction. However, little is known about how these explanations can be effectively and efficiently presented to the user. In the following paper, we present an empirical study conducted in the domain of hotels to investigate the effect of different textual explanation types on, among others, perceived system transparency and trustworthiness, as well as the overall assessment of explanation quality. The explanations presented to participants follow an argument-based design, which we propose to provide a rationale to support a recommendation in a structured way. Our results show that people prefer explanations that include an aggregation using percentages of other users’ opinions, over explanations that only include a brief summary of opinions. The results additionally indicate that user characteristics such as social awareness may influence the perception of explanation quality.}, isbn = {9781450367110}, doi = {10.1145/3386392.3399302}, url = {https://dl.acm.org/doi/10.1145/3386392.3399302?cid=99659550942} } @inproceedings{ubo_mods_00148660, author = {Donkers, Tim and Kleemann, Timm and Ziegler, Jürgen}, editor = {Paternò, Fabio and Oliver, Nuria}, title = {Explaining Recommendations by Means of Aspect-Based Transparent Memories}, booktitle = {Proceedings of the 25th International Conference on Intelligent User Interfaces}, year = {2020}, publisher = {The Association for Computing Machinery}, address = {New York, NY}, pages = {166–176}, isbn = {978-1-4503-7118-6}, doi = {10.1145/3377325.3377520}, url = {https://dl.acm.org/doi/pdf/10.1145/3377325.3377520}, abstract = {Recommender Systems have seen substantial progress in terms of algorithmic sophistication recently. Yet, the systems mostly act as black boxes and are limited in their capacity to explain why an item is recommended. In many cases recommendations methods are employed in scenarios where users not only rate items, but also convey their opinion on various relevant aspects, for instance by the means of textual reviews. Such user-generated content can serve as a useful source for deriving explanatory information to increase system intelligibility and, thereby, the user’s understanding. We propose a recommendation and explanation method that exploits the comprehensiveness of textual data to make the underlying criteria and mechanisms that lead to a recommendation more transparent. Concretely, the method incorporates neural memories that store aspect-related opinions extracted from raw review data. We apply attention mechanisms to transparently write and read information from memory slots. Besides customary offline experiments, we conducted an extensive user study. The results indicate that our approach achieves a higher overall quality of explanations compared to a state-of-the-art baseline. Utilizing Structural Equation Modeling, we additionally reveal three linked key factors that constitute explanation quality: Content adequacy, presentation adequacy, and linguistic adequacy.} } @article{ubo_mods_00137427, author = {Beckmann, Nils and Viga, Reinhard and Dogangun, Aysegül and Grabmaier, Anton}, title = {Measurement and analysis of local pulse transit time for emotion recognition}, journal = {IEEE Sensors Journal (J-SEN)}, year = {2019}, publisher = {Institute of Electrical and Electronics Engineers (IEEE)}, address = {Piscataway}, volume = {19}, number = {17}, pages = {7683–7692}, keywords = {Emotion; emotion recognition; photoplethysmography; PPG; PTT; pulse transit time; wearable}, issn = {1558-1748}, doi = {10.1109/JSEN.2019.2915529}, url = {https://doi.org/10.1109/JSEN.2019.2915529}, language = {en} } @inproceedings{ubo_mods_00166667, author = {Hernandez Bocanegra, Diana Carolina and Ziegler, Jürgen}, title = {Assessing the Helpfulness of Review Content for Explaining Recommendations}, booktitle = {EARS 2019: The 2nd International Workshop on ExplainAble Recommendation and Search}, year = {2019}, publisher = {ACM}, address = {New York}, keywords = {Recommender systems, explanations}, url = {http://arxiv.org/abs/2010.06328}, archiveprefix = {arXiv}, eprint = {2010.06328}, language = {en} } @inproceedings{ubo_mods_00144402, author = {Loepp, Benedikt and Ziegler, Jürgen}, title = {Measuring the Impact of Recommender Systems – A Position Paper on Item Consumption in User Studies}, booktitle = {Proceedings of the 1st Workshop on Impact of Recommender Systems (ImpactRS ’19)}, year = {2019}, keywords = {User Studies}, url = {https://impactrs19.github.io/papers/short4.pdf}, abstract = {While participants of recommender systems user studies usually cannot experience recommended items, it is common practice that researchers ask them to fill in questionnaires regarding the quality of systems and recommendations. While this has been shown to work well under certain circumstances, it sometimes seems not possible to assess user experience without enabling users to consume items, raising the question of whether the impact of recommender systems has always been measured adequately in past user studies. In this position paper, we aim at exploring this question by means of a literature review and at identifying aspects that need to be further investigated in terms of their influence on assessments in users studies, for instance, the difference between consumption of products or only of related information as well as the effect of domain, domain knowledge and other possibly confounding factors.} } @inproceedings{ubo_mods_00143261, author = {Ziegler, Jürgen}, editor = {Weyers, Benjamin and Bowen, Judy}, title = {Challenges in User-Centered Engineering of AI-based Interactive Systems}, booktitle = {Joint Proceedings HCI Engineering 2019 – Methods and Tools for Advanced Interactive Systems and Integration of Multiple Stakeholder Viewpoints co-located with 11th ACM SIGCHI Symposium on Engineering Interactive Computing Systems (EICS 2019)}, series = {CEUR Workshop Proceedings}, year = {2019}, address = {Aachen}, volume = {2503}, pages = {51–55}, keywords = {User Interface Engineering}, issn = {1613-0073}, url = {http://ceur-ws.org/Vol-2503/}, abstract = {Intelligent algorithms have reached a new level of performance in recent years and are increasingly employed in application areas such as speech and image recognition, data analytics, or recommender systems. The proliferation of these techniques poses a range of new challenges for the design and engineering of interactive systems since they tend to act as black boxes and do not offer the transparency and level of control to the user which is considered a prerequisite for user-centered design in the HCI field. In this position paper, we provide an overview of the broad areas related to intelligent algorithms and HCI that will need further research in the future to make systems useful, usable and trustable.} } @inproceedings{ubo_mods_00142455, author = {Loepp, Benedikt and Donkers, Tim and Kleemann, Timm and Ziegler, Jürgen}, title = {Impact of Consuming Suggested Items on the Assessment of Recommendations in User Studies on Recommender Systems}, booktitle = {Proceedings of the 28th International Joint Conference on Artificial Intelligence (IJCAI ’19)}, year = {2019}, publisher = {IJCAI Organization}, pages = {6201–6205}, keywords = {Recommender Systems}, doi = {10.24963/ijcai.2019/863}, url = {https://doi.org/10.24963/ijcai.2019/863}, abstract = {User studies are increasingly considered important in research on recommender systems. Although participants typically cannot consume any of the recommended items, they are often asked to assess the quality of recommendations and of other aspects related to user experience by means of questionnaires. Not being able to listen to recommended songs or to watch suggested movies, might however limit the validity of the obtained results. Consequently, we have investigated the effect of consuming suggested items. In two user studies conducted in different domains, we showed that consumption may lead to differences in the assessment of recommendations and in questionnaire answers. Apparently, adequately measuring user experience is in some cases not possible without allowing users to consume items. On the other hand, participants sometimes seem to approximate the actual value of recommendations reasonably well depending on domain and provided information.} } @inproceedings{ubo_mods_00140448, author = {Loepp, Benedikt and Ziegler, Jürgen}, title = {Towards Interactive Recommending in Model-based Collaborative Filtering Systems}, booktitle = {Proceedings of the 13th ACM Conference on Recommender Systems (RecSys ’19)}, year = {2019}, publisher = {ACM}, address = {New York, NY, USA}, pages = {546–547}, keywords = {User Experience}, isbn = {978-1-4503-6243-6}, doi = {10.1145/3298689.3346949}, abstract = {Numerous attempts have been made for increasing the interactivity in recommender systems, but the features actually available in today’s systems are in most cases limited to rating or re-rating single items. We present a demonstrator that showcases how model-based collaborative filtering recommenders may be enhanced with advanced interaction and preference elicitation mechanisms in a holistic manner. Hereby, we underline that by employing methods we have proposed in the past it becomes possible to easily extend any matrix factorization recommender into a fully interactive, user-controlled system. By presenting and deploying our demonstrator, we aim at gathering further insights, both into how the different mechanisms may be intertwined even more closely, and how interaction behavior and resulting user experience are influenced when users can choose from these mechanisms at their own discretion.}, url = {https://dl.acm.org/doi/10.1145/3298689.3346949?cid=87958660357} } @inproceedings{ubo_mods_00140449, author = {Torkamaan, Helma and Barbu, Catalin-Mihai and Ziegler, Jürgen}, editor = {Bogers, Toine and Said, Alan}, title = {How Can They Know That? A Study of Factors Affecting the Creepiness of Recommendations}, booktitle = {Proceedings of the 13th ACM Conference on Recommender Systems}, year = {2019}, publisher = {ACM}, address = {New York, NY}, pages = {423–427}, keywords = {Trust}, isbn = {978-1-4503-6243-6}, doi = {10.1145/3298689.3346982}, abstract = {Recommender systems (RS) often use implicit user preferences extracted from behavioral and contextual data, in addition to traditional rating-based preference elicitation, to increase the quality and accuracy of personalized recommendations. However, these approaches may harm user experience by causing mixed emotions, such as fear, anxiety, surprise, discomfort, or creepiness. RS should consider users’ feelings, expectations, and reactions that result from being shown personalized recommendations. This paper investigates the creepiness of recommendations using an online experiment in three domains: movies, hotels, and health. We define the feeling of creepiness caused by recommendations and find out that it is already known to users of RS. We further find out that the perception of creepiness varies across domains and depends on recommendation features, like causal ambiguity and accuracy. By uncovering possible consequences of creepy recommendations, we also learn that creepiness can have a negative influence on brand and platform attitudes, purchase or consumption intention, user experience, and users’ expectations of—and their trust in—RS.} } @inproceedings{ubo_mods_00138306, author = {Kunkel, Johannes and Feldkamp, Tamara and Ziegler, Jürgen}, title = {Kartenbasierte Produktraumdarstellung zur Erhöhung von Transparenz und Steuerbarkeit in Empfehlungssystemen}, booktitle = {Mensch und Computer 2019: Tagungsband}, year = {2019}, publisher = {ACM}, address = {New York}, keywords = {Filterblasen}, note = {Poster Abstract}, doi = {10.1145/3340764.3344893}, abstract = {Empfehlungssysteme (ES) werden häufig eingesetzt, um Nutzer bei der Auswahl eines Produkts aus vielen Alternativen zu unterstützen. Während Empfehlungsalgorithmen hinsichtlich ihrer Präzision bereits sehr ausgereift sind, verhindern mangelnde Transparenz der Empfehlungen und fehlende Interaktionsmöglichkeiten, dass ES ihr volles Potential entfalten. In diesem Beitrag stellen wir eine Methode vor, die einerseits auf verständlichere Empfehlungen und mehr Kontrolle durch den Nutzern abzielt, andererseits aber auch dessen Übersicht über die Produktdomäne adressiert. Dabei dient eine Verteilung aller Produkte auf einer zweidimensionalen Fläche als Basis. Innerhalb können Nutzer ihre Präferenzen ausdrücken, woraufhin das ES mit passenden Empfehlungen reagiert. Um die Empfehlungen zu verändern, können Nutzer ihre Präferenzen anpassen, was in einem kontinuierlichen Feedback-Zyklus zwischen Nutzer und ES resultiert. Die Methode wird zudem an zwei Prototypen demonstriert, welche sie in verschiedenen Produktdomänen und mit unterschiedlichen Formen der Visualisierung und Interaktion umsetzen. Empirische Nutzerstudien zu den Prototypen versprechen ein hohes Potential des Ansatzes Übersicht, Transparenz und Kontrolle in ES zu verbessern.} } @inproceedings{ubo_mods_00139553, author = {Álvarez Márquez, Jesús Omar and Ziegler, Jürgen}, title = {Augmented-Reality-Enhanced Product Comparison in Physical Retailing}, booktitle = {Mensch und Computer 2019: Tagungsband}, year = {2019}, publisher = {ACM Press}, address = {New York}, pages = {55–65}, keywords = {natural interaction}, isbn = {978-1-4503-7198-8}, doi = {10.1145/3340764.3340800}, abstract = {Augmented reality technology has experienced great improvement in recent years and it has been successfully applied to industry and entertainment settings. However, its application in everyday contexts such as shopping is still very limited. One of the requirements to seamlessly incorporate augmented reality into everyday tasks is to find intuitive, natural methods to make use of it. Due to the inherent capabilities of augmented reality to work as a visual aid to explore and extend the knowledge a user has of the surroundings, this paper proposes the combination of AR technology and product advisors in a novel approach for product comparison. The user’s awareness of the differences between multiple physically present objects is enhanced through virtual augmentations, supporting an intuitive way of comparing two or more products while shopping. To assess the validity of the concept, a prototype for an AR-based shopping assistant for comparing vacuum cleaners has been implemented and evaluated in a user study, testing different methods of visual comparison and interaction.} } @inproceedings{ubo_mods_00139552, author = {Kleemann, Timm and Ziegler, Jürgen}, title = {Integration of Dialog-based Product Advisors into Filter Systems}, booktitle = {Proceedings of the Conference on Mensch und Computer}, series = {ACM International Conference Proceeding Series}, year = {2019}, publisher = {ACM Press}, address = {New York}, pages = {67–77}, keywords = {Dialogbasierte Produktberater, Filtersysteme}, isbn = {978-1-4503-7198-8}, doi = {10.1145/3340764.3340786}, abstract = { Different techniques such as search functions or recommendation components are used today to support the often complex product search on the Internet. Faceted filter systems that successively limit the result set according to the set filter settings have proven to be quite successful. However, this method requires clear objectives and domain knowledge on the part of the users. As an alternative, conversational product advisors who select suitable products on the basis of a sequence of questions have gained more importance in recent times, whereby the questions are based more on the tasks and application scenarios of the users than on the technical properties of the products. However, there is currently a lack of approaches that integrate filter systems and conversational advisors in a meaningful and closely coupled way. In this paper an integrated approach is presented, where users can switch between filter systems and advisory dialogues, whereby selection actions in one component have a consistent and transparent effect on the other component and can be further adjusted there. The aim is to better support users with different levels of knowledge of the product type concerned. We describe the requirements for such integrated systems resulting from our approach and report on a user study in which the user behavior and the subjective evaluation were examined in a prototypical implementation.} } @inproceedings{ubo_mods_00139861, author = {Naveed, Sidra and Ziegler, Jürgen}, title = {Feature-driven interactive recommendations and explanations with collaborative filtering approach}, booktitle = {ComplexRec 2019: Proceedings of the Workshop on Recommendation in Complex Scenarios}, year = {2019}, volume = {2449}, pages = {10–15}, keywords = {Interactive recommendations}, url = {http://ceur-ws.org/Vol-2449/paper2.pdf} } @inproceedings{ubo_mods_00139865, author = {Millecamp, Martijn and Verbert, Katrien and Naveed, Sidra and Ziegler, Jürgen}, title = {To explain or not to explain: the effects of personal characteristics when explaining feature-based recommendations in different domains}, booktitle = {IntRS 2019: Proceedings of the 6th Joint Workshop on Interfaces and Human Decision Making for Recommender Systems}, year = {2019}, volume = {2450}, pages = {10–18}, keywords = {User modelling}, url = {http://ceur-ws.org/Vol-2450/paper2.pdf} } @inproceedings{ubo_mods_00139863, author = {Herrmanny, Katja and Löppenberg, Simone and Schwarz, Michael}, title = {Investigating mechanisms for user integration in the activity goal recommendation process by interface design}, booktitle = {IntRS 2019: Proceedings of the 6th Joint Workshop on Interfaces and Human Decision Making for Recommender Systems}, year = {2019}, pages = {46–54}, keywords = {User interface}, url = {http://ceur-ws.org/Vol-2450/paper6.pdf} } @inproceedings{ubo_mods_00138305, author = {Kunkel, Johannes and Loepp, Benedikt and Dolff, Esther and Ziegler, Jürgen}, title = {LittleMissFits: Ein Game-With-A-Purpose zur Evaluierung subjektiver Verständlichkeit von latenten Faktoren in Empfehlungssystemen}, booktitle = {Mensch und Computer 2019 – Workshopband}, year = {2019}, publisher = {Gesellschaft für Informatik e.V.}, pages = {49–56}, keywords = {Nutzerkontrolle}, doi = {10.18420/muc2019-ws-576}, url = {https://dx.doi.org/10.18420/muc2019-ws-576}, abstract = {Empfehlungssysteme, die mit Hilfe latenter Faktormodelle Empfehlungen generieren, arbeiten äußerst genau und sind entsprechend weit verbreitet. Da die Berechnung der Empfehlungen jedoch auf der statistischen Auswertung von Benutzerbewertungen basiert, gestaltet es sich schwierig, die Empfehlungen dem Nutzer gegenüber zu erklären. Daher werden die Systeme häufig als intransparent wahrgenommen und können oft ihr volles Potential nicht entfalten. Erste Ansätze zeigen allerdings, dass die latenten Faktoren solcher Modelle semantische Eigenschaften der Produkte widerspiegeln. Dabei ist bislang unklar, ob die zum Teil sehr komplexe Parametrisierung, die z.B. die Anzahl der Faktoren festlegt, Auswirkungen auf die semantische Verständlichkeit hat. Da dies sehr von der subjektiven Wahrnehmung abhängt, präsentieren wir mit LittleMissFits ein Online-Spiel, das es erlaubt, mittels Crowd-Sourcing die Konsistenz der latenten Faktoren zu untersuchen. Die Ergebnisse einer Nutzerstudie mit diesem Spiel zeigen, dass eine höhere Anzahl von Faktoren das Modell weniger verständlich erscheinen lässt. Darüber hinaus fanden sich Unterschiede innerhalb der Faktormodelle bezüglich der Verständlichkeit der einzelnen Faktoren. Zusammengenommen stellen die Ergebnisse eine wertvolle Grundlage dar, um künftig die Transparenz entsprechender Empfehlungssysteme zu steigern.} } @inproceedings{ubo_mods_00136811, author = {Kunkel, Johannes and Donkers, Tim and Michael, Lisa and Barbu, Catalin-Mihai and Ziegler, Jürgen}, title = {Let Me Explain: Impact of Personal and Impersonal Explanations on Trust in Recommender Systems}, booktitle = {Proceedings of the 37th International Conference on Human Factors in Computing Systems (CHI ’19)}, year = {2019}, publisher = {ACM}, address = {New York}, pages = {487:1–487:12}, isbn = {978-1-4503-5970-2}, doi = {10.1145/3290605.3300717}, url = {https://doi.org/10.1145/3290605.3300717}, abstract = {Trust in a Recommender System (RS) is crucial for its overall success. However, it remains underexplored whether users trust personal recommendation sources (i.e. other humans) more than impersonal sources (i.e. conventional RS), and, if they do, whether the perceived quality of explanation provided account for the difference. We conducted an empirical study in which we compared these two sources of recommendations and explanations. Human advisors were asked to explain movies they recommended in short texts while the RS created explanations based on item similarity. Our experiment comprised two rounds of recommending. Over both rounds the quality of explanations provided by users was assessed higher than the quality of the system’s explanations. Moreover, explanation quality significantly influenced perceived recommendation quality as well as trust in the recommendation source. Consequently, we suggest that RS should provide richer explanations in order to increase their perceived recommendation quality and trustworthiness.} } @inproceedings{ubo_mods_00136781, author = {Torkamaan, Helma and Ziegler, Jürgen}, title = {Rating-based preference elicitation for recommendation of stress intervention}, booktitle = {ACM UMAP 2019 - Proceedings of the 27th ACM Conference on User Modeling, Adaptation and Personalization}, year = {2019}, publisher = {ACM}, address = {New York}, pages = {46–50}, keywords = {Preference elicitation}, isbn = {978-1-4503-6021-0}, doi = {10.1145/3320435.3324990}, url = {http://dl.acm.org/ft_gateway.cfm?id=3324990&type=pdf} } @inproceedings{ubo_mods_00132857, author = {Barbu, Catalin-Mihai and Carbonell, Guillermo and Ziegler, Jürgen}, title = {The Influence of Trust Cues on the Trustworthiness of Online Reviews for Recommendations}, booktitle = {Proceedings of the 34th ACM/SIGAPP Symposium on Applied Computing}, year = {2019}, publisher = {ACM Press}, address = {New York}, pages = {1687–1689}, keywords = {User study}, isbn = {978-1-4503-5933-7}, doi = {10.1145/3297280.3297603}, abstract = {In recent years, recommender systems have started to exploit user-generated content, in particular online reviews, as an additional means of personalizing and explaining their predictions. However, reviews that are poorly written or perceived as fake may have a detrimental effect on the users’ trust in the recommendations. Embedding so-called "trust cues" in the user interface is a technique that can help users judge the trustworthiness of presented information. We report preliminary results from an online user study that investigated the impact of trust cues—in the form of helpfulness votes—on the trustworthiness of online reviews for recommendations.} } @inproceedings{Kunkel.2019b, author = {Kunkel, Johannes and Ziegler, Jürgen}, title = {Visualizing Item Spaces to Increase Transparency and Control in Recommender Systems}, booktitle = {AI and HCI Workshop at CHI’19}, year = {2019} } @article{ubo_mods_00127145, author = {Carbonell, Guillermo and Barbu, Catalin-Mihai and Vorgerd, Laura and Brand, Matthias}, title = {The impact of emotionality and trust cues on the perceived trustworthiness of online reviews}, journal = {Cogent Business and Management}, year = {2019}, volume = {6}, number = {1}, pages = {1586062}, keywords = {trust cues}, abstract = {Online reviews and trust cues are two core aspects of e-commerce. Based on these features, users can make informed decisions about the products and services they buy online. Although prior studies have investigated on various review characteristics, the writing style has been examined less frequently. This empirical study simulated an e-commerce platform, in which participants (N =?124) were confronted with the reviews and helpfulness votes of other users while searching for one certain product (i.e. a laptop). The task was to rate how trustworthy or fake the reviews are, and the purchase intention after reading each review. Our results show that a factual writing style is considered more trustworthy, less fake, and entails a higher purchase intention when compared to emotional reviews. The trust cues were only relevant in interaction with variables that measure trust in the Internet as a safe environment for making monetary transactions. Furthermore, we found that trustworthiness influenced purchase intention, but the fakeness perception of the review does not yield such effects. We suggest future studies to understand this result and highlight implications for platform design.}, issn = {2331-1975}, doi = {10.1080/23311975.2019.1586062} } @article{ubo_mods_00109856, author = {Loepp, Benedikt and Donkers, Tim and Kleemann, Timm and Ziegler, Jürgen}, volume = {121}, pages = {21–41}, title = {Interactive Recommending with Tag-Enhanced Matrix Factorization (TagMF)}, journal = {International Journal of Human Computer Studies}, year = {2019}, keywords = {Collaborative Filtering, Empirical studies, Human factors, Interactive recommending, Matrix Factorization, Recommender Systems, Tags, User experience, User interfaces, User profiles}, doi = {10.1016/j.ijhcs.2018.05.002}, url = {https://doi.org/10.1016/j.ijhcs.2018.05.002}, abstract = {We introduce TagMF, a model-based Collaborative Filtering method that aims at increasing transparency and offering richer interaction possibilities in current Recommender Systems. Model-based Collaborative Filtering is currently the most popular method that predominantly uses Matrix Factorization: This technique achieves high accuracy in recommending interesting items to individual users by learning latent factors from implicit feedback or ratings the community of users provided for the items. However, the model learned and the resulting recommendations can neither be explained, nor can users be enabled to influence the recommendation process except by rating (more) items. In TagMF, we enhance a latent factor model with additional content information, specifically tags users provided for the items. The main contributions of our method are to use this integrated model to elucidate the hidden semantics of the latent factors and to let users interactively control recommendations by changing the influence of the factors through easily comprehensible tags: Users can express their interests, interactively manipulate results, and critique recommended items—at cold-start when no historical data is yet available for a new user, as well as in case a long-term profile representing the current user’s preferences already exists. To validate our method, we performed offline experiments and conducted two empirical user studies where we compared a recommender that employs TagMF against two established baselines, standard Matrix Factorization based on ratings, and a purely tag-based interactive approach. This user-centric evaluation confirmed that enhancing a model-based method with additional information positively affects perceived recommendation quality. Moreover, recommendations were considered more transparent and users were more satisfied with their final choice. Overall, learning an integrated model and implementing the interactive features that become possible as an extension to contemporary systems with TagMF appears beneficial for the subjective assessment of several system aspects, the level of control users are able to exert over the recommendation process, as well as user experience in general.} } @inproceedings{ubo_mods_00191580, author = {Schwarz, Michael and Dogangün, Aysegül}, editor = {Dachselt, Raimund and Weber, Gerhard}, title = {Ein lernender Ansatz für kontext-adaptive individuelle Sportempfehlungen}, booktitle = {Mensch und Computer 2018: Tagungsband, 02.-05. September 2018, Dresden}, year = {2018}, publisher = {Gesellschaft fur Informatik (GI)}, address = {Bonn}, pages = {297–301}, doi = {10.18420/muc2018-mci-0397}, url = {https://doi.org/10.18420/muc2018-mci-0397}, language = {en} } @inproceedings{ubo_mods_00122633, author = {Beckmann, Nils and Viga, Reinhard and Dogangün, Aysegül and Grabmaier, Anton}, title = {Considering skin inhomogeneity in photoplethysmography-based local pulse transit time measurement}, booktitle = {Proccedings of IEEE Life Sciences Conference}, year = {2018}, publisher = {Institute of Electrical and Electronics Engineers Inc.}, pages = {101–104}, keywords = {Wearables}, isbn = {9781538667095}, doi = {10.1109/LSC.2018.8572210} } @book{ubo_mods_00119356, author = {Sauer, Hanno and Wagner, Nils-Frederic and Paldan, Katrin and Dogangün, Aysegül}, title = {Ein ethischer Leitfaden zum Gesundheitsmonitoring}, year = {2018}, publisher = {DuEPublico: Duisburg-Essen Publications Online, University of Duisburg-Essen}, address = {Duisburg, Essen}, keywords = {Leitfaden}, abstract = {Dieser Leitfaden macht auf die wichtigsten ethischen Problemfelder im Zusammenhang mit Gesundheitsmonitoring aufmerksam. Ziel ist es, berechtigte von unberechtigten Sorgen zu unterscheiden und Lösungskonzepte für reale Risiken im Gesundheitsmonitoring vorzuschlagen.}, doi = {10.17185/duepublico/46850}, url = {http://duepublico.uni-duisburg-essen.de/servlets/DocumentServlet?id=46850} } @inproceedings{ubo_mods_00118531, author = {Bentahar, Jamal and Otrok, Hadi and Bakhtiyari, Kaveh and Taghavi, Mona}, title = {Cloudchain: A Blockchain-Based Coopetition Differential Game Model for Cloud Computing}, booktitle = {Service-Oriented Computing}, series = {Lecture Notes in Computer Science}, year = {2018}, publisher = {Springer}, address = {Cham}, volume = {11236}, pages = {146–161}, isbn = {978-3-030-03596-9}, doi = {10.1007/978-3-030-03596-9_10} } @inproceedings{ubo_mods_00117943, author = {Kizina, Anna and Kunkel, Johannes and Ziegler, Jürgen}, title = {Ein kollaboratives Task-Management-System mit spielerischen Elementen}, booktitle = {Mensch und Computer 2018: Workshopband}, year = {2018}, publisher = {Gesellschaft für Informatik e.V.}, address = {Bonn}, keywords = {Kollaboration}, issn = {2510-2672}, doi = {10.18420/muc2018-ws03-0477} } @inproceedings{ubo_mods_00117090, author = {Torkamaan, Helma and Ziegler, Jürgen}, title = {Multi-criteria rating-based preference elicitation in health recommender systems}, booktitle = {Proceedings of the Third International Workshop on Health Recommender Systems co-located with Twelfth ACM Conference on Recommender Systems (HealthRecSys’18)}, series = {CEUR Workshop Proceedings}, year = {2018}, month = {oct}, address = {Aachen}, volume = {2216}, pages = {18–23}, keywords = {Recommender systems}, issn = {1613-0073}, url = {http://ceur-ws.org/Vol-2216/healthRecSys18_paper_7.pdf}, venue = {Vancouver, BC, Canada}, month_numeric = {10} } @inproceedings{ubo_mods_00116566, author = {Loepp, Benedikt and Donkers, Tim and Kleemann, Timm and Ziegler, Jürgen}, title = {Impact of Item Consumption on Assessment of Recommendations in User Studies}, booktitle = {Proceedings of the 12th ACM Conference on Recommender Systems (RecSys ’18)}, year = {2018}, publisher = {ACM}, address = {New York, NY, USA}, pages = {49–53}, keywords = {User Studies}, isbn = {978-1-4503-5901-6}, doi = {10.1145/3240323.3240375}, url = {https://dl.acm.org/doi/10.1145/3240323.3240375?cid=87958660357}, abstract = {In user studies of recommender systems, participants typically cannot consume the recommended items. Still, they are asked to assess recommendation quality and other aspects related to user experience by means of questionnaires. Without having listened to recommended songs or watched suggested movies, however, this might be an error-prone task, possibly limiting validity of results obtained in these studies. In this paper, we investigate the effect of actually consuming the recommended items. We present two user studies conducted in different domains showing that in some cases, differences in the assessment of recommendations and in questionnaire results occur. Apparently, it is not always possible to adequately measure user experience without allowing users to consume items. On the other hand, depending on domain and provided information, participants sometimes seem to approximate the actual value of recommendations reasonably well.} } @inproceedings{ubo_mods_00116397, author = {Álvarez Márquez, Jesús Omar and Ziegler, Jürgen}, editor = {Dachselt, R. and Weber, G.}, title = {Augmented Reality Based Recommending in the Physical World}, booktitle = {Mensch und Computer 2018 - Workshopband}, year = {2018}, publisher = {Gesellschaft für Informatik e.V.}, address = {Bonn}, pages = {285–291}, keywords = {information visualization}, doi = {10.18420/muc2018-ws07-0461} } @inproceedings{ubo_mods_00116350, author = {Barbu, Catalin-Mihai and Ziegler, Jürgen}, editor = {Neidhardt, Julia and Wörndl, Wolfgang and Kuflik, Tsvi and Zanker, Markus}, title = {Designing Interactive Visualizations of Personalized Review Data for a Hotel Recommender System}, booktitle = {RecTour 2018: 3rd Workshop on Recommenders in Tourism co-located with the 12th ACM Conference on Recommender Systems (RecSys 2018)}, series = {CEUR Workshop Proceedings}, year = {2018}, publisher = {RWTH}, address = {Aachen}, volume = {2222}, pages = {7–12}, keywords = {Tourism}, abstract = {Online reviews extracted from social media are being used increasingly in recommender systems, typically to enhance prediction accuracy. A somewhat less studied avenue of research aims to investigate the underlying relationships that arise between users, items, and the topics mentioned in reviews. Identifying these–often implicit–relationships could be beneficial for at least a couple of reasons. First, they would allow recommender systems to personalize reviews based on a combination of both topic and user similarity. Second, they can facilitate the development of novel interactive visualizations that complement and help explain recommendations even further. In this paper, we report on our ongoing work to personalize user reviews and visualize them in an interactive manner, using hotel recommending as an example domain. We also discuss several possible interactive mechanisms and consider their potential benefits towards increasing users’ satisfaction.}, issn = {1613-0073}, url = {http://ceur-ws.org/Vol-2222/paper2.pdf} } @inproceedings{ubo_mods_00115757, author = {Loepp, Benedikt and Ziegler, Jürgen}, title = {Recommending Running Routes: Framework and Demonstrator}, booktitle = {Proceedings of the 2nd Second Workshop on Recommendation in Complex Scenarios (ComplexRec ’18)}, year = {2018}, pages = {26–29}, keywords = {Sports}, url = {http://toinebogers.com/workshops/complexrec2018/resources/proceedings.pdf#page=26}, abstract = {Recommending personalized running routes is a challenging task. When the runner’s specific background as well as needs, preferences and goals are taken into account, a recommender cannot only rely on e.g. a set of existing routes ran by others, but needs to individually generate each route while considering many different aspects that determine whether a suggestion will satisfy the runner in the end, e.g. height meters or areas passed. We describe a framework that summarizes these aspects, allowing to generate personalized running routes. Based on this framework, we present a prototypical smartphone app that we implemented to actually demonstrate how running routes can be recommended based on the different requirements a runner might have. A first small study where users had to try this app and ran some of the recommended routes underlines the general effectiveness of our approach.} } @inproceedings{ubo_mods_00115227, author = {Kunkel, Johannes and Loepp, Benedikt and Ziegler, Jürgen}, title = {Understanding Latent Factors Using a GWAP}, booktitle = {Proceedings of the Late-Breaking Results track part of the Twelfth ACM Conference on Recommender Systems (RecSys ’18)}, year = {2018}, keywords = {Game with a Purpose}, url = {https://arxiv.org/abs/1808.10260}, abstract = {Recommender systems relying on latent factor models often appear as black boxes to their users. Semantic descriptions for the factors might help to mitigate this problem. Achieving this automatically is, however, a non-straightforward task due to the models’ statistical nature. We present an output-agreement game that represents factors by means of sample items and motivates players to create such descriptions. A user study shows that the collected output actually reflects real-world characteristics of the factors.} } @inproceedings{ubo_mods_00114940, author = {Kunkel, Johannes and Loepp, Benedikt and Ziegler, Jürgen}, title = {Ein Online-Spiel zur Benennung latenter Faktoren in Empfehlungssystemen}, booktitle = {Mensch und Computer 2018 – Tagungsband}, year = {2018}, publisher = {Gesellschaft für Informatik e.V.}, keywords = {Games with a Purpose}, abstract = {Empfehlungssysteme, die auf latenten Faktormodellen basieren, sind dafür bekannt sehr genaue Vorschläge zu generieren. Häufig werden diese Systeme jedoch von Nutzern als intransparent wahrgenommen. Semantische Beschreibungen der latenten Faktoren könnten helfen, dieses Problem zu lindern. Solche Beschreibungen automatisch zu ermitteln gestaltet sich allerdings aufgrund der statistischen Herleitung der Faktoren aus numerischen Bewertungsdaten als schwierig. In diesem Beitrag stellen wir ein Output-Agreement-Spiel vor, das Spieler dazu motiviert, anhand repräsentativer Produkte Beschreibungen zu den Faktoren zu erstellen. Eine durchgeführte Nutzerstudie zeigt, dass das Spiel viel Spaß bereitet und die erhobenen Beschreibungen realweltliche Eigenschaften der Faktoren widerspiegeln.}, doi = {10.18420/muc2018-mci-0108}, url = {https://dl.gi.de/handle/20.500.12116/16729} } @inproceedings{ubo_mods_00114820, author = {Naveed, Sidra and Donkers, Tim and Ziegler, Jürgen}, title = {Argumentation-based explanations in recommender systems: Conceptual framework and empirical results}, booktitle = {UMAP 2018 - Adjunct Publication of the 26th Conference on User Modeling, Adaptation and Personalization}, year = {2018}, address = {New York, NY, USA}, publisher = {ACM}, pages = {293–298}, keywords = {User-centered}, isbn = {9781450357845}, doi = {10.1145/3213586.3225240} } @article{ubo_mods_00112246, author = {Taghavi, Mona and Bentahar, Jamal and Bakhtiyari, Kaveh and Hanachi, Chihab}, title = {New Insights Towards Developing Recommender Systems}, journal = {The Computer Journal}, year = {2018}, publisher = {Oxford University Press}, volume = {61}, number = {3}, pages = {319–348}, keywords = {taxonomy}, issn = {1460-2067}, doi = {10.1093/comjnl/bxx056} } @inproceedings{ubo_mods_00106122, author = {Kunkel, Johannes and Donkers, Tim and Barbu, Catalin-Mihai and Ziegler, Jürgen}, booktitle = {2nd Workshop on Theory-Informed User Modeling for Tailoring and Personalizing Interfaces (HUMANIZE)}, title = {Trust-Related Effects of Expertise and Similarity Cues in Human-Generated Recommendations}, year = {2018}, keywords = {Structural Equation Modeling}, url = {http://ceur-ws.org/Vol-2068/humanize5.pdf}, abstract = {A user’s trust in recommendations plays a central role in the acceptance or rejection of a recommendation. One factor that influences trust is the source of the recommendations. In this paper we describe an empirical study that investigates the trust-related influence of social presence arising in two scenarios: human-generated recommendations and automated recommending. We further compare visual cues indicating the expertise of a human recommendation source and its similarity with the target user, and evaluate their influence on trust. Our analysis indicates that even subtle visual cues can signal expertise and similarity effectively, thus influencing a user’s trust in recommendations. These findings suggest that automated recommender systems could benefit from the inclusion of social components–especially when conveying characteristics of the recommendation source. Thus, more informative and persuasive recommendation interfaces may be designed using such a mixed approach.} } @inproceedings{ubo_mods_00104370, author = {Donkers, Tim and Loepp, Benedikt and Ziegler, Jürgen}, booktitle = {Proceedings of the 1st Workshop on Explainable Smart Systems (ExSS ’18)}, title = {Explaining Recommendations by Means of User Reviews}, year = {2018}, keywords = {Explanations}, url = {http://ceur-ws.org/Vol-2068/exss8.pdf}, abstract = {The field of recommender systems has seen substantial progress in recent years in terms of algorithmic sophistication and quality of recommendations as measured by standard accuracy metrics. Yet, the systems mainly act as black boxes for the user and are limited in their capability to explain why certain items are recommended. This is particularly true when using abstract models which do not easily lend themselves for providing explanations. In many cases, however, recommendation methods are employed in scenarios where users not only rate items, but also provide feedback in the form of tags or written product reviews. Such user-generated content can serve as a useful source for deriving explanatory information that may increase the user’s understanding of the underlying criteria and mechanisms that led to the results. In this paper, we describe a set of developments we undertook to couple such textual content with common recommender techniques. These developments have moved from integrating tags into collaborative filtering to employing topics and sentiments expressed in reviews to increase transparency and to give users more control over the recommendation process. Furthermore, we describe our current research goals and a first concept concerning extraction of more complex argumentative explanations from textual reviews and presenting them to users.} } @article{ubo_mods_00103875, author = {Álvarez Márquez, Jesús Omar and Ziegler, Jürgen}, title = {Negotiation and Reconciliation of Preferences in a Group Recommender System}, journal = {Journal of Information Processing}, year = {2018}, publisher = {Information Processing Society of Japan}, volume = {26}, pages = {186–200}, keywords = {decision-making}, issn = {1882-6652}, doi = {10.2197/ipsjjip.26.186}, abstract = {This article presents an approach to group recommender systems that focuses its attention on the group’s social interaction during the formulation, discussion and negotiation of the features the item to be jointly selected should possess. Current group recommender techniques are mainly based on aggregating existing user profiles or on a profile of the group as a whole. Our method supports collaborative preference elicitation and negotiation process where desired features have to be chosen individually, but group consensus is needed for them to become active in the item filtering process. Users provide feedback on the selected preferences and change their significance, bringing up new recommendations each time individual settings are modified. The last stage in the decision process is also supported, when users collectively select the final item from the recommendation set. We explored the possible benefits of our approach through the development of three prototypes, each based on a different variant of the approach with a different emphasis on private and group-wide preference spaces. They were evaluated with user groups of different size, addressing questions regarding the effectiveness of different information sharing methods and the repercussion of group size in the recommendation process. We compare the different methods and consolidate the findings in an initial model of recommending for group.} } @inproceedings{ubo_mods_00170072, author = {Aker, Ahmet and Sliwa, Alfred and Ma, Yuan and Liu, Ruishen and Borad, Niravkumar and Ziyaei, Seyedeh Fatemeh and Ghbadi, Mina}, title = {What works and what does not: Classifier and feature analysis for argument mining}, booktitle = {Proceedings of the 4th Workshop on Argument Mining}, year = {2017}, publisher = {Association for Computational Linguistics (ACL)}, address = {Stroudsburg}, pages = {91–96}, isbn = {978-1-945626-84-5}, language = {en} } @inproceedings{ubo_mods_00149808, author = {van de Sand, Laura and Dogangün, Aysegül}, editor = {Eibl, Maximillian and Gaedke, Martin}, title = {Visualisierung von Datensicherheitsaspekten in Healthmonitoring-Apps}, booktitle = {Informatik 2017 - Bände I-III: Tagung vom 25.-29. September 2017 in Chemnitz}, series = {GI-Edition Proceedings}, year = {2017}, publisher = {Gesellschaft fur Informatik (GI)}, address = {Bonn}, volume = {275}, pages = {697–700}, isbn = {978-3-88579-669-5}, issn = {1617-5468}, doi = {10.18420/in2017_66}, url = {https://dl.gi.de/handle/20.500.12116/4087} } @inproceedings{10.1007/978-3-319-53676-7_2, author = {Jannach, Dietmar and Naveed, Sidra and Jugovac, Michael}, editor = {Bridge, Derek and Stuckenschmidt, Heiner}, title = {User Control in Recommender Systems: Overview and Interaction Challenges}, booktitle = {E-Commerce and Web Technologies}, year = {2017}, publisher = {Springer International Publishing}, pages = {21–33}, abstract = {Recommender systems have shown to be valuable tools that help users find items of interest in situations of information overload. These systems usually predict the relevance of each item for the individual user based on their past preferences and their observed behavior. If the system’s assumption about the users’ preferences are however incorrect or outdated, mechanisms should be provided that put the user into control of the recommendations, e.g., by letting them specify their preferences explicitly or by allowing them to give feedback on the recommendations. In this paper we review and classify the different approaches from the research literature of putting the users into active control of what is recommended. We highlight the challenges related to the design of the corresponding user interaction mechanisms and finally present the results of a survey-based study in which we gathered user feedback on the implemented user control features on Amazon.} } @inproceedings{ubo_mods_00111873, author = {Stegemann, Timo and Ziegler, Jürgen}, editor = {Nikitina, Nadeschda and Song, Dezhao}, title = {Pattern-based analysis of SPARQL queries from the LSQ dataset}, booktitle = {Proceedings of the ISWC 2017 Posters & Demonstrations and Industry Tracks}, series = {CEUR Workshop Proceedings}, year = {2017}, publisher = {CEUR-WS}, address = {Aachen}, volume = {1963}, issn = {1613-0073}, url = {http://ceur-ws.org/Vol-1963/paper542.pdf} } @inproceedings{ubo_mods_00111846, author = {Herrmanny, Katja and Dogangün, Aysegül}, editor = {Elsweiler, David and Hors-Fraile, Santiago}, title = {The impact of prediction uncertainty in recommendations for health-related behavior}, booktitle = {Proceedings of the 2nd International Workshop on Health Recommender Systems}, series = {CEUR Workshop Proceedings}, year = {2017}, volume = {1953}, pages = {14–17}, keywords = {Uncertainty}, issn = {1613-0073} } @inproceedings{ubo_mods_00108514, author = {Dogangün, Aysegül and Schwarz, Michael and Kloppenborg, Katharina and Le, Robert}, title = {An approach to improve physical activity by generating individual implementation intentions}, booktitle = {Adjunct Publication of the 25th Conference on User Modeling, Adaptation and Personalization}, year = {2017}, publisher = {ACM}, address = {New York}, pages = {370–375}, keywords = {User modeling}, isbn = {9781450350679}, doi = {10.1145/3099023.3099101} } @inproceedings{ubo_mods_00108262, author = {Schäfer, Hanna and Hors-Fraile, Santiago and Karumur, Pavan Raghav and Valdez, Calero André and Said, Alan and Torkamaan, Helma and Ulmer, Tom and Trattner, Christoph}, title = {Towards Health (Aware) Recommender Systems}, booktitle = {Proceedings of the 2017 International Conference on Digital Health}, year = {2017}, publisher = {ACM}, address = {New York}, pages = {157–161}, keywords = {Patient modeling}, isbn = {978-1-4503-5249-9}, doi = {10.1145/3079452.3079499} } @inproceedings{ubo_mods_00106644, author = {Álvarez Márquez, Jesús Omar and Ziegler, Jürgen}, editor = {}, title = {Improving the Shopping Experience with an Augmented Reality-Enhanced Shelf}, booktitle = {Mensch und Computer 2017 - Workshopband}, year = {2017}, pages = {629–632}, keywords = {augmented reality; enhanced retailing; human-computer interaction}, doi = {10.18420/muc2017-demo-0351}, language = {en} } @article{ubo_mods_00106902, author = {Troncy, Raphaël and Rizzo, Giuseppe and Jameson, Anthony and Corcho, Oscar and Plu, Julien and Palumbo, Enrico and Ballesteros Hermida, Carlos Juan and Spirescu, Adrian and Kuhn, Kai-Dominik and Barbu, Catalin-Mihai and Rossi, Matteo and Celino, Irene and Agarwal, Rachit and Scanu, Christian and Valla, Massimo and Haaker, Timber}, title = {3cixty: Building comprehensive knowledge bases for city exploration}, journal = {Journal of Web Semantics}, year = {2017}, publisher = {Elsevier B.V.}, address = {Amsterdam [u.a.]}, volume = {46-47}, pages = {2–13}, keywords = {Smart city}, issn = {1570-8268}, doi = {10.1016/j.websem.2017.07.002} } @inproceedings{ubo_mods_00081254, author = {Bakhtiyari, Kaveh and Ziegler, Jürgen and Husain, Hafizah}, chapter = {}, title = {The Effect of Presentation in Online Advertising on Perceived Intrusiveness and Annoyance in Different Emotional States}, series = {Lecture Notes in Computer Science}, year = {2017}, publisher = {Springer}, volume = {10191}, pages = {140–149}, isbn = {978-3-319-54472-4}, doi = {10.1007/978-3-319-54472-4}, url = {https://link.springer.com/chapter/10.1007%2F978-3-319-54472-4_14}, booktitle = {Proceedings of the 9th Asian Conference on Intelligent Information and Database Systems (ACIIDS ’17)} } @inproceedings{ubo_mods_00102542, author = {Bakhtiyari, Kaveh and Ziegler, Jürgen and Husain, Hafizah}, chapter = {}, title = {KinRes: depth sensor noise reduction in contactless respiratory monitoring}, year = {2017}, publisher = {ACM}, address = {New York, NY, USA}, pages = {472–475}, isbn = {978-1-4503-6363-1}, doi = {10.1145/3154862.3154896}, booktitle = {Proceedings of the 11th EAI International Conference on Pervasive Computing Technologies for Healthcare} } @article{ubo_mods_00084836, author = {Bakhtiyari, Kaveh and Beckmann, Nils and Ziegler, Jürgen}, title = {Contactless heart rate variability measurement by IR and 3D depth sensors with respiratory sinus arrhythmia}, journal = {Procedia Computer Science}, year = {2017}, volume = {109}, pages = {498–505}, abstract = {Heart rate variability (HRV) is known to be correlated with emotional arousal, cognitive depletion, and health status. Despite the accurate HRV detection by various body-attached sensors, a contactless method is desirable for the HCI purposes. In this research, we propose a non-invasive contactless HRV measurement by Microsoft Kinect 2 sensor with Respiratory Sinus Arrhythmia (RSA) correction. The Infrared and RGB cameras are used to measure the heart rate signal, and its 3D Depth sensor is employed to capture the human respiratory signal to correct the initially calculated HRV with RSA. The correlation analysis among the calculated HRVs by different methods and devices showed a significant improvement in reliable HRV measurements. This study enlightens the researchers and developers to choose a proper method for HRV calculations based on their required accuracy and application.}, issn = {1877-0509}, doi = {10.1016/j.procs.2017.05.319}, note = {The 8th International Conference on Ambient Systems, Networks and Technologies, ANT-2017 and the 7th International Conference on Sustainable Energy Information Technology, SEIT 2017, 16-19 May 2017, Madeira, Portugal} } @inproceedings{ubo_mods_00096389, author = {Torkamaan, Helma and Ziegler, Jürgen}, booktitle = {2017 Seventh International Conference on Affective Computing and Intelligent Interaction (ACII), San Antonio, Texas, October 23-26}, year = {2017}, title = {A Taxonomy of Mood Research and Its Applications in Computer Science}, publisher = {Institute of Electrical and Electronics Engineers Inc.}, address = {Piscataway}, pages = {421–426}, isbn = {978-1-5386-0563-9}, doi = {10.1109/ACII.2017.8273634} } @inproceedings{Stegemann2017, author = {Stegemann, Timo and Ziegler, Jürgen}, editor = {d’Amato, Claudia and Fernandez, Miriam and Tamma, Valentina and Lecue, Freddy and Cudré-Mauroux, Philippe and Sequeda, Juan and Lange, Christoph and Heflin, Jeff}, title = {Investigating Learnability, User Performance, and Preferences of the Path Query Language SemwidgQL Compared to SPARQL}, booktitle = {The Semantic Web – ISWC 2017: 16th International Semantic Web Conference, Vienna, Austria, October 21–25, 2017, Proceedings, Part I}, year = {2017}, publisher = {Springer International Publishing}, address = {Cham}, pages = {611–627}, abstract = {In this paper, we present an empirical comparison of user performance and perceived usability for Sparql versus SemwidgQL, a path-oriented Rdf query language. We developed SemwidgQL to facilitate the formulation of Rdf queries and to enable non-specialist developers and web authors to integrate Linked Data and other semantic data sources into standard web applications. We performed a user study in which participants wrote a set of queries in both languages. We measured both objective performance as well as subjective responses to a set of questionnaire items. Results indicate that SemwidgQL is easier to learn, more efficient, and preferred by learners. To assess the applicability of SemwidgQL in real applications, we analyzed its expressiveness based on a large corpus of observed Sparql queries, showing that the language covers more than 90% of the typical queries performed on Linked Data.}, isbn = {978-3-319-68288-4}, doi = {10.1007/978-3-319-68288-4_36}, url = {https://doi.org/10.1007/978-3-319-68288-4_36} } @inproceedings{ubo_mods_00093591, author = {Beckmann, Nils and Viga, Reinhard and Dogangün, Aysegül and Grabmaier, Anton}, chapter = {}, title = {Measuring local pulse transit time for affective computing applications}, year = {2017}, publisher = {Hochschule Ruhr West}, address = {Mülheim an der Ruhr}, pages = {106–107}, isbn = {978-3-9814801-9-1}, url = {https://www.hochschule-ruhr-west.de/fileadmin/user_upload/02_Forschung/Fachbereich_4/Institut_Mess-_und_Sensortechnik/IEEE_Workshop/IEEE_2017/Abstractbook_Online_Version_2017_06_12.pdf}, booktitle = {Industrial and medical measurement and sensor technology, vehicle sensor technnology: IEEE Workshop 2017 : abstractbook} } @inproceedings{ubo_mods_00094630, author = {Barbu, Catalin-Mihai and Ziegler, Jürgen}, editor = {Boratto, Ludovico and Carta, Salvatore and Fenu, Gianni}, chapter = {}, title = {Towards a Design Space for Personalizing the Presentation of Recommendations}, series = {CEUR workshop proceedings}, year = {2017}, volume = {1945}, pages = {10–17}, keywords = {Interactive control}, url = {http://ceur-ws.org/Vol-1945/paper_3.pdf}, abstract = {Although personalization plays a major role in the development of recommender systems, the presentation of recommendations and especially the way in which it can be adapted to suit the user’s needs has received relatively little attention from the research community. We introduce a design space for personalizing the presentation of recommendations and propose several dimensions that should be a part of it. Moreover, we present our initial insights about possible interactive mechanisms as well as potential evaluation criteria. Our goal is to provide a systematic way of designing personalized recommendation content, which should prove benecial for other researchers working on this topic. In the longer term, we are interested to investigate whether such personalized presentation implementations influence the perceived trustworthiness of the recommendations.}, booktitle = {EnCHIReS 2017: Engineering Computer-Human Interaction in Recommender Systems : Proceedings of the Second Workshop on Engineering Computer-Human Interaction in Recommender Systems co-located with the 9th ACM SIGCHI Symposium on Engineering Interactive Computing Systems (EICS 2017)} } @inproceedings{ubo_mods_00093590, author = {Beckmann, Nils and Viga, Reinhard and Dogangün, Aysegül and Grabmaier, Anton}, chapter = {}, title = {Measuring local pulse transit time for affective computing applications}, year = {2017}, publisher = {Hochschule Ruhr West}, address = {Mülheim an der Ruhr}, pages = {30–31}, url = {http://yra-medtech.de/daten_medtech/dokumente2017/YRA_Booklet_2017_LO.pdf}, booktitle = {2nd YRA MedTech Symposium, Young Researchers Academy: booklet : jointly held with the IEEE Workshop & SENSORICA 2017 Hochschule Ruhr West, June 8-9, Mülheim a. d. Ruhr, Germany, 2017} } @inproceedings{ubo_mods_00093653, author = {Beckmann, Nils and Viga, Reinhard and Dogangün, Aysegül and Grabmaier, Anton}, chapter = {}, title = {Reproducibility of photoplethysmography-based local pulse transit time measurement}, year = {2017}, publisher = {IEEE}, address = {Piscataway, NJ}, pages = {246–249}, keywords = {correlation;correlation coefficient;feature extraction;pulse measurements;sensors;signal-to-noise ratio (SNR);time measurement}, doi = {10.1109/EMBC.2017.8036808}, booktitle = {2017 39th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)} } @inproceedings{ubo_mods_00092173, author = {Biefang, Kai and Kunkel, Johannes and Loepp, Benedikt and Ziegler, Jürgen}, chapter = {}, title = {Eine Sandbox zur physisch-virtuellen Exploration von Ausgrabungsstätten}, year = {2017}, publisher = {Gesellschaft für Informatik}, keywords = {Archäologie}, doi = {10.18420/muc2017-demo-0300}, url = {https://dl.gi.de/handle/20.500.12116/3248}, abstract = {In diesem Beitrag stellen wir die Archäologische Sandbox vor: Ein Tangible User Interface (TUI) mit dem archäologische Ausgrabungsstätten und dort gefundene Artefakte exploriert werden können. Das System zielt auf den Einsatz in Museen ab, die ihren Besuchern den Zusammenhang von ausgestellten Exponaten und der Ausgrabungsstätte näherbringen möchten, an der diese gefunden wurden. Den Kern des TUIs bildet eine mit Sand gefüllte Box, auf dessen Oberfläche eine geografische Karte projiziert wird. Durch das Graben im Sand an der richtigen Stelle werden Informationen zu an diesem Ort gefundenen Ausstellungsstücken abgerufen. Eine durchgeführte qualitative Interviewstudie bestätigt die intuitive Bedienbarkeit und die intrinsisch motivierenden Interaktionsmöglichkeiten des Systems.}, booktitle = {Mensch und Computer 2017 – Workshopband} } @inproceedings{ubo_mods_00090488, author = {Donkers, Tim and Loepp, Benedikt and Ziegler, Jürgen}, chapter = {}, title = {Sequential User-based Recurrent Neural Network Recommendations}, year = {2017}, publisher = {ACM}, address = {New York, NY, USA}, pages = {152–160}, keywords = {Sequential Recommendations}, doi = {10.1145/3109859.3109877}, url = {https://dl.acm.org/doi/10.1145/3109859.3109877?cid=87958660357}, abstract = {Recurrent Neural Networks are powerful tools for modeling sequences. They are flexibly extensible and can incorporate various kinds of information including temporal order. These properties make them well suited for generating sequential recommendations. In this paper, we extend Recurrent Neural Networks by considering unique characteristics of the Recommender Systems domain. One of these characteristics is the explicit notion of the user recommendations are specifically generated for. We show how individual users can be represented in addition to sequences of consumed items in a new type of Gated Recurrent Unit to effectively produce personalized next item recommendations. Offline experiments on two real-world datasets indicate that our extensions clearly improve objective performance when compared to state-of-the-art recommender algorithms and to a conventional Recurrent Neural Network.}, booktitle = {Proceedings of the 11th ACM Conference on Recommender Systems (RecSys ’17)} } @inproceedings{ubo_mods_00090298, author = {Barbu, Catalin-Mihai and Ziegler, Jürgen}, editor = {Neidhardt, Julia and Fesenmaier, Daniel and Kuflik, Tsvi and Wörndl, Wolfgang}, chapter = {}, title = {Co-Staying: a Social Network for Increasing the Trustworthiness of Hotel Recommendations}, series = {CEUR workshop proceedings}, year = {2017}, volume = {1906}, pages = {35–39}, keywords = {Trustworthiness}, abstract = {Recommender systems attempt to match users’ preferences with items. To achieve this, they typically store and process a large amount of user profiles, item attributes, as well as an ever-increasing volume of user-generated feedback about those items. By mining user-generated data, such as reviews, a complex network consisting of users, items, and item properties can be created. Exploiting this network could allow a recommender system to identify, with greater accuracy, items that users are likely to find attractive based on the attributes mentioned in their past reviews as well as in those left by similar users. At the same time, allowing users to visualize and explore the network could lead to novel ways of interacting with recommender systems and might play a role in increasing the trustworthiness of recommendations. We report on a conceptual model for a multimode network for hotel recommendations and discuss potential interactive mechanisms that might be employed for visualizing it.}, url = {http://ceur-ws.org/Vol-1906/paper6.pdf}, booktitle = {RecTour 2017: 2nd Workshop on Recommenders in Tourism : Proceedings of the 2nd Workshop on Recommenders in Tourism co-located with 11th ACM Conference on Recommender Systems (RecSys 2017) Como, Italy, August 27, 2017} } @inproceedings{ubo_mods_00090297, author = {Barbu, Catalin-Mihai and Ziegler, Jürgen}, editor = {Domonkos, Tikk and Pu, Pearl}, chapter = {}, title = {Users’ Choices About Hotel Booking: Cues for Personalizing the Presentation of Recommendations}, series = {CEUR workshop proceedings}, year = {2017}, volume = {1905}, pages = {44–45}, keywords = {Tourism}, abstract = {Personalization in recommender systems has typically been applied to the underlying algorithms. In contrast, the presentation of individual recommendations—specifically, the various ways in which it can be adapted to suit the user’s needs in a more effective manner—has received relatively little attention by comparison. We present the results of an exploratory survey about users’ choices regarding hotel recommendations and draw preliminary conclusions about whether these choices can influence the presentation of recommendations.}, url = {http://ceur-ws.org/Vol-1905/recsys2017_poster22.pdf}, booktitle = {Poster Proceeding of ACM Recsys 2017: Proceedings of the Poster Track of the 11th ACM Conference on Recommender Systems (RecSys 2017) Como, Italy, August 28, 2017} } @inproceedings{ubo_mods_00089204, author = {Barbu, Catalin-Mihai and Ziegler, Jürgen}, editor = {Brusilovsky, Peter and de Gemmis, Marco and Felfernig, Alexander and Lops, Pasquale and O’Donovan, John and Tintarev, Nava and Willemsen, C. Martijn}, chapter = {}, title = {User Model Dimensions for Personalizing the Presentation of Recommendations}, series = {CEUR workshop proceedings}, year = {2017}, volume = {1884}, pages = {20–23}, keywords = {User profile}, abstract = {Personalization in recommender systems has typically been applied to the underlying algorithms and to the predicted result sets. Meanwhile, the presentation of individual recommendations—specifically, the various ways in which it can be adapted to suit the user’s needs in a more effective manner—has received relatively little attention by comparison. A limiting factor for the design of such interactive and personalized presentations is the quality of the user data, such as elicited preferences, that is available to the recommender system. At the same time, many of the existing user models are not optimized sufficiently for this specific type of personalization. We present the results of an exploratory survey about users’ choices regarding the presentation of hotel recommendations. Based on our analysis, we propose several novel dimensions to the conventional user models exploited by recommender systems. We argue that augmenting user profiles with this range of information would facilitate the development of more interactive mechanisms for personalizing the presentation of recommendations. This, in turn, could lead to increased transparency and control over the recommendation process.}, url = {http://ceur-ws.org/Vol-1884/paper4.pdf}, booktitle = {IntRS 2017: Interfaces and Human Decision Making for Recommender Systems : Proceedings of the 4th Joint Workshop on Interfaces and Human Decision Making for Recommender Systems co-located with ACM Conference on Recommender Systems (RecSys 2017)} } @inproceedings{ubo_mods_00089097, author = {Feuerbach, Jan and Loepp, Benedikt and Barbu, Catalin-Mihai and Ziegler, Jürgen}, title = {Enhancing an Interactive Recommendation System with Review-based Information Filtering}, booktitle = {Proceedings of the 4th Joint Workshop on Interfaces and Human Decision Making for Recommender Systems (IntRS ’17)}, series = {CEUR workshop proceedings}, year = {2017}, volume = {1884}, pages = {2–9}, keywords = {User Reviews}, abstract = {Integrating interactive faceted filtering with intelligent recommendation techniques has shown to be a promising means for increasing user control in Recommender Systems. In this paper, we extend the concept of blended recommending by automatically extracting meaningful facets from social media by means of Natural Language Processing. Concretely, we allow users to influence the recommendations by selecting facet values and weighting them based on information other users provided in their reviews. We conducted a user study with an interactive recommender implemented in the hotel domain. This evaluation shows that users are consequently able to find items fitting interests that are typically difficult to take into account when only structured content data is available. For instance, the extracted facets representing the opinions of hotel visitors make it possible to effectively search for hotels with comfortable beds or that are located in quiet surroundings without having to read the user reviews.}, url = {http://ceur-ws.org/Vol-1884/paper1.pdf} } @incollection{ubo_mods_00084449, author = {Loepp, Benedikt and Ziegler, Jürgen}, editor = {Proff, Heike and Fojcik, Martin Thomas}, title = {Empirische Bedarfsanalyse zur intermodalen Navigation und dem Einsatz von Informationssystemen zur Förderung ihrer Attraktivität}, booktitle = {Innovative Produkte und Dienstleistungen in der Mobilität: Technische und betriebswirtschaftliche Aspekte}, year = {2017}, publisher = {Springer Gabler}, address = {Wiesbaden, Germany}, pages = {409–426}, keywords = {Intermodale Navigation}, isbn = {978-3-658-18613-5}, doi = {10.1007/978-3-658-18613-5_26}, url = {http://dx.doi.org/10.1007/978-3-658-18613-5_26}, abstract = {Eine vermehrt intermodale Fortbewegung ist in Zeiten, in denen angesichts überfüllter Innenstädte und Straßen die Verringerung des Verkehrsaufkommens und Verlagerung des motorisierten Individualverkehrs auf umweltfreundlichere Alternativen zunehmend relevanter werden, von großer Bedeutung. Heute gängige Navigationslösungen und Routenplaner sind bezüglich der Unterstützung komplexer, insbesondere intermodaler Mobilitätsketten jedoch oft nur unzureichend entwickelt: Es mangelt einerseits an einer einheitlichen Integration der Informationen unterschiedlicher Verkehrsmittel, andererseits vor allem an Personalisierungsmöglichkeiten und einer intelligenten Anpassung der Systeme an die momentane Situation des Nutzers. Oft werden beispielsweise Angebote wie Car- und Bikesharing noch außer Acht gelassen, und auch der Kontext als wichtige Determinante bei der Wahl einer Route – für einen beruflichen Termin bei schlechter Witterung kann ein Fahrrad etwa weniger geeignet sein als bei einem Familienausflug unter sonnigen Bedingungen – bleibt meist unberücksichtigt. In diesem Beitrag stellen wir die Ergebnisse einer im Rahmen des BMVI-geförderten Projekts colognE-mobil II durchgeführten Bedarfsanalyse bestehend aus zwei empirischen Untersuchungen vor: Sowohl online als auch vor Ort im Rhein-Ruhr-Gebiet wurden 318 bzw. 130 Personen befragt, um die aktuelle Nutzung unterschiedlicher Verkehrsträger zu untersuchen, sowie die Einschätzung ihrer bestehenden Probleme und künftigen Potenziale zu ermitteln. Spezieller Fokus lag auf den gerade für den städtischen Raum relevanten Alternativen, etwa Car- und Bikesharing, aber auch intermodaler Navigation im Allgemeinen. Während sich grundsätzlich eine hohe Nutzungsbereitschaft abzeichnete, leiden derartige Angebote aus Sicht der Befragten u. a. an Zugangsschwierigkeiten, mangelnder Verbreitung, oder waren schlicht zu unbekannt, als dass sie eine echte Alternative hätten darstellen können. Die Auswahl an Verkehrsmitteln wird unterdessen beständig größer, und beinhaltet zunehmend ökologischere Varianten als den Individualverkehr. Aufgrund steigender Kraftstoffpreise, CO2-Abgaben, Straßenmaut und überlasteten Innenstädten erhöht sich dementsprechend die Bedeutung der Unabhängigkeit vom privaten PKW, vor allem bei Jüngeren. Mit Hilfe von Mock-Ups eines Routenplaners untersuchten wir deshalb ebenfalls, ob sich Nutzer mittels geeigneter Hinweise – etwa auf erhöhte Umweltfreundlichkeit oder die aktuelle Verkehrslage – dazu animieren lassen, ihre typischerweise routinierte Strecken- und Verkehrsmittelwahl anzupassen. Die Ergebnisse zeigen u. a., dass zur Assistenz bei Fahrplanauskunft oder Routenplanung entwickelte Informationssysteme auf diese Weise die wahrgenommene Attraktivität intermodaler Wegeketten sowie von Car- und Bikesharing-Angeboten signifikant steigern können.} } @inproceedings{ubo:80746, author = {Loepp, Benedikt and Ziegler, Jürgen}, chapter = {}, title = {On User Awareness in Model-Based Collaborative Filtering Systems}, year = {2017}, keywords = {User Experience}, url = {https://iuiaware2017.files.wordpress.com/2016/11/on_user_awareness_in_model-based_collaborative_filtering_systems2.pdf}, abstract = {In this paper, we discuss several aspects that users are typically not fully aware of when using model-based Collaborative Filtering systems. For instance, the methods prevalently used in conventional recommenders infer abstract models that are opaque to users, making it difficult to understand the learned profile, and consequently, why certain items are recommended. Further, users are not able to keep an overview of the item space, and thus the alternatives that in principle could also be suggested. By summarizing our experiences on exploiting latent factor models for increasing control and transparency, we show that the respective techniques may also contribute to make users more aware of their preferences’ representation, the rationale behind the results, and further items of potential interest.}, booktitle = {Proceedings of the 1st Workshop on Awareness Interfaces and Interactions (AWARE ’17)} } @inproceedings{ubo:80745, author = {Kunkel, Johannes and Loepp, Benedikt and Ziegler, Jürgen}, chapter = {}, title = {A 3D Item Space Visualization for Presenting and Manipulating User Preferences in Collaborative Filtering}, year = {2017}, publisher = {ACM}, address = {New York, NY, USA}, pages = {3–15}, keywords = {3D Visualizations}, doi = {10.1145/3025171.3025189}, url = {https://dl.acm.org/doi/10.1145/3025171.3025189?cid=87958660357}, abstract = {While conventional Recommender Systems perform well in automatically generating personalized suggestions, it is often difficult for users to understand why certain items are recommended and which parts of the item space are covered by the recommendations. Also, the available means to influence the process of generating results are usually very limited. To alleviate these problems, we suggest a 3D map-based visualization of the entire item space in which we position and present sample items along with recommendations. The map is produced by mapping latent factors obtained from Collaborative Filtering data onto a 2D surface through Multidimensional Scaling. Then, areas that contain items relevant with respect to the current user’s preferences are shown as elevations on the map, areas of low interest as valleys. In addition to the presentation of his or her preferences, the user may interactively manipulate the underlying profile by raising or lowering parts of the landscape, also at cold-start. Each change may lead to an immediate update of the recommendations. Using a demonstrator, we conducted a user study that, among others, yielded promising results regarding the usefulness of our approach.}, booktitle = {Proceedings of the 22nd International Conference on Intelligent User Interfaces (IUI ’17)} } @inproceedings{ubo_mods_00166623, author = {Meyer, Matthias and Beck, Fabian and Lohmann, Steffen}, title = {Visual monitoring of process runs: An application study for stored procedures}, year = {2016}, publisher = {IEEE Computer Society}, pages = {160–167}, isbn = {978-1-5090-1451-4}, issn = {2165-8773}, doi = {10.1109/PACIFICVIS.2016.7465264}, url = {https://doi.org/10.1109/PACIFICVIS.2016.7465264}, language = {en} } @inproceedings{ubo_mods_00191585, author = {Paldan, Katrin and Skodra, Julita and Paldan, Patric and Herrmanny, Katja and Dogangün, Aysegül}, editor = {Weyers, B. and Dittmar, B.}, title = {Urban Health mAPP}, booktitle = {Mensch und Computer 2016: Workshopbeiträge, 4.-7. September 2016, Aachen}, year = {2016}, publisher = {Gesellschaft für Informatik (GI)}, address = {Bonn}, doi = {10.18420/muc2016-ws14-0001}, url = {https://doi.org/10.18420/muc2016-ws14-0001}, language = {en} } @inproceedings{ubo_mods_00191583, author = {Sell, Jennifer and Herrmanny, Katja and Dogangün, Aysegül}, editor = {Weyers, B. and Dittmar, B.}, title = {Besser-Esser: Das Konzept einer nutzerbezogenen Ernährungs-App}, booktitle = {Mensch und Computer 2016: Workshopbeiträge, 4.-7. September 2016, Aachen}, year = {2016}, publisher = {Gesellschaft für Informatik (GI)}, address = {Bonn}, doi = {10.18420/muc2016-ws02-0010}, url = {https://doi.org/10.18420/muc2016-ws02-0010}, language = {en} } @inproceedings{ubo_mods_00108558, author = {Mirnig, G. Alexander and Wintersberger, Philipp and Sutter, Christine and Ziegler, Jürgen}, editor = {Green, Paul}, title = {A Framework for Analyzing and Calibrating Trust in Automated Vehicles}, booktitle = {Adjunct Proceedings of the 8th International Conference on Automotive User Interfaces and Interactive Vehicular Applications}, year = {2016}, publisher = {ACM}, address = {New York}, pages = {33–38}, keywords = {Automated vehicles}, isbn = {978-1-4503-4654-2}, doi = {10.1145/3004323.3004326} } @inproceedings{ubo:74508, author = {Álvarez Márquez, Jesús Omar and Ziegler, Jürgen}, editor = {Yuizono, Takaya and Ogata, Hiroaki and Hoppe, Ulrich Heinz and Vassileva, Julita}, chapter = {}, title = {Hootle+: A Group Recommender System Supporting Preference Negotiation}, series = {Lecture Notes in Computer Science}, year = {2016}, publisher = {Springer}, address = {Cham}, volume = {9848}, pages = {151–166}, keywords = {Decision-Making}, isbn = {978-3-319-44799-5}, doi = {10.1007/978-3-319-44799-5_12}, url = {https://link.springer.com/chapter/10.1007/978-3-319-44799-5_12}, abstract = {This paper presents an approach to group recommender systems that focuses its attention on the group’s social interaction during the formulation, discussion and negotiation of the features the item to be jointly selected should possess. The system supports a collaborative preference elicitation and negotiation process where desired item features can be defined individually, but group consensus is needed for them to become active in the item filtering process. Users can provide feedback on other members’ preferences and change their significance, bringing up new recommendations each time individual settings are modified. The last stage in the decision process is also supported, when users collectively select the final item from the recommendation set. We developed the prototype hotel recommender Hootle+ and evaluated it in a user study involving groups of different size. The results indicate a good overall satisfaction, which increases with group size. However, the success ratio for bigger groups is lower than for small groups, raising questions for follow-up research. }, booktitle = {Collaboration and Technology: 22nd International Conference, CRIWG 2016, Kanazawa, Japan, September 14-16, 2016, Proceedings} } @inproceedings{ubo:74644, author = {Beckmann, Nils and Dammin, Nicolas and Viga, Reinhard and Dogangün, Aysegül}, chapter = {}, title = {Smartphone based HRV measurement - an unobtrusive and flexible approach}, year = {2016}, publisher = {Univ.}, address = {Duisburg}, booktitle = {Young Researchers Academy MedTech in NRW: 1st YRA MEdTech Symposium} } @inproceedings{ubo:73248, author = {Loepp, Benedikt and Barbu, Catalin-Mihai and Ziegler, Jürgen}, chapter = {}, title = {Interactive Recommending: Framework, State of Research and Future Challenges}, year = {2016}, pages = {3–13}, keywords = {Survey}, abstract = {In this paper, we present a framework describing the various aspects of recommender systems that can serve for empowering users by giving them more interactive control and transparency in the recommendation process. While conventional recommenders mostly operate like black boxes that cannot be influenced by the user, we identify four aspects properly connected with the recommendation algorithm—namely input data, user model, external con-text model and presentation—as essential points in which a system may be enhanced by additional interaction possibilities. In light of this framework, we take a closer look at prior and present solutions to integrate recommender systems with more interactivity and describe future research challenges. Regarding these challenges, we especially focus on experiences gained in our own work and outline future research we have planned in the area of interactive recommending.}, url = {http://ceur-ws.org/Vol-1705/02-paper.pdf}, booktitle = {Proceedings of the 1st Workshop on Engineering Computer-Human Interaction in Recommender Systems (EnCHIReS ’16)} } @inproceedings{ubo:72486, author = {Barbu, Catalin-Mihai}, chapter = {}, title = {Increasing the Trustworthiness of Recommendations by Exploiting Social Media Sources}, year = {2016}, address = {New York, NY, USA}, publisher = {ACM}, pages = {447–450}, keywords = {recommender systems}, abstract = {Current recommender systems mostly do not take into account as well as they might the wealth of information available in social media, thus preventing the user from obtaining a broad and reliable overview of different opinions and ratings on a product. Furthermore, there is a lack of user control over the recommendation process–which is mostly fully automated and does not allow the user to influence the sources and mechanisms by which recommendations are produced–as well as over the presentation of recommended items. Consequently, recommendations are often not transparent to the user, are considered to be less trustworthy, or do not meet the user’s situational needs. This work will investigate the theoretical foundations for user-controllable, interactive methods of recommending, will develop techniques that exploit social media data in conjunction with other sources, and will validate the research empirically in the area of e-commerce product recommendations. The methods developed are intended to be applicable in a wide range of recommending and decision support scenarios.}, isbn = {978-1-4503-4035-9}, doi = {10.1145/2959100.2959104}, url = {https://dl.acm.org/citation.cfm?id=2959104}, booktitle = {Proceedings of the 10th ACM Conference on Recommender Systems} } @inproceedings{ubo:72538, author = {Donkers, Tim and Loepp, Benedikt and Ziegler, Jürgen}, chapter = {}, title = {Towards Understanding Latent Factors and User Profiles by Enhancing Matrix Factorization with Tags}, year = {2016}, keywords = {Explanations}, url = {http://ceur-ws.org/Vol-1688/paper-20.pdf}, abstract = {With the interactive recommending approach we have recently proposed, users are given more control over model-based Collaborative Filtering while the results are perceived as more transparent. Integrating the latent factors derived by Matrix Factorization with tags users provided for the items has, however, even more advantages. In this paper, we show how general understanding of the abstract factor space, and of user and item positions inside it, can benefit from the semantics introduced by considering additional information. Moreover, our approach allows us to explain the user’s (former latent) preference profile by means of tags.}, booktitle = {Poster Proceedings of the 10th ACM Conference on Recommender Systems (RecSys ’16)} } @inproceedings{ubo:69909, author = {Donkers, Tim and Loepp, Benedikt and Ziegler, Jürgen}, chapter = {}, title = {Tag-Enhanced Collaborative Filtering for Increasing Transparency and Interactive Control}, year = {2016}, publisher = {ACM}, address = {New York, NY, USA}, pages = {169–173}, keywords = {User Experience}, abstract = {To increase transparency and interactive control in Recommender Systems, we extended the Matrix Factorization technique widely used in Collaborative Filtering by learning an integrated model of user-generated tags and latent factors derived from user ratings. Our approach enables users to manipulate their preference profile expressed implicitly in the (intransparent) factor space through explicitly presented tags. Furthermore, it seems helpful in cold-start situations since user preferences can be elicited via meaningful tags instead of ratings. We evaluate this approach and present a user study that to our knowledge is the most extensive empirical study of tag-enhanced recommending to date. Among other findings, we obtained promising results in terms of recommendation quality and perceived transparency, as well as regarding user experience, which we analyzed by Structural Equation Modeling.}, doi = {10.1145/2930238.2930287}, url = {https://dl.acm.org/doi/10.1145/2930238.2930287?cid=87958660357}, booktitle = {Proceedings of the 24th Conference on User Modeling Adaptation and Personalization (UMAP ’16)} } @inproceedings{ubo:69423, author = {Gaulke, Werner and Ziegler, Jürgen}, chapter = {}, title = {Rule-enhanced task models for increased expressiveness and compactness}, year = {2016}, edition = {EICS ’16}, publisher = {ACM}, address = {Brussels, Belgium}, pages = {4–15}, isbn = {978-1-4503-4322-0}, doi = {10.1145/2933242.2933243}, abstract = {User centered design and development of interactive systems utilizes theoretically well-grounded, yet practical ways to capture user’s goals and intentions. Task models are an established approach to break down a central objective into a set of hierarchical organized tasks. While task models achieve to provide a good overview of the overall system, they often lack detail necessary to (semi-) automatically generate user interfaces. Based on requirements derived from a comprehensive overview of existing task model extensions, improvements and development methods, an approach that integrates logical rules with task models is introduced. By means of practical examples it is shown, that the integration of rules enables advanced execution flows as well as leaner task models thus improving their practical value.}, booktitle = {Proceedings of the 8th ACM SIGCHI Symposium on Engineering Interactive Computing Systems} } @inproceedings{ubo:67235, author = {Herrmanny, Katja and Beckmann, Nils and Nachbar, Katrin and Sauer, Hanno and Ziegler, Jürgen and Dogangün, Aysegül and ACM CHI 2016}, chapter = {}, title = {Using psychophysiological parameters to support users in setting effective activity goals}, year = {2016}, publisher = {ACM}, address = {New York, NY, USA}, pages = {1637–1646}, isbn = {978-1-4503-4082-3}, doi = {10.1145/2851581.2892378}, booktitle = {CHI EA ’16: Proceedings of the 2016 CHI Conference Extended Abstracts on Human Factors in Computing Systems} } @inproceedings{ubo:67231, author = {Herrmanny, Katja and Ziegler, Jürgen and Dogangün, Aysegül and PERSUASIVE 2016}, editor = {Meschtscherjakov, Alexander and De Ruyter, Boris and Fuchsberger, Verena and Murer, Martin and Tscheligi, Manfred}, chapter = {}, title = {Supporting users in setting effective goals in activity tracking}, series = {Lecture notes in computer science}, year = {2016}, publisher = {Springer International Publishing}, address = {Cham}, volume = {9638}, pages = {15–26}, isbn = {978-3-319-31509-6}, doi = {10.1007/978-3-319-31510-2_2}, booktitle = {Persuasive Technology: 11th International Conference ; PERSUASIVE 2016 ; Salzburg, Austria, April 5-7, 2016 ; Proceedings} } @article{Lausen2016, author = {Lausen, Melanie and Herrmanny, Katja and Stegemann, Timo and Dogangün, Aysegül}, title = {Health-Promoting Virtual Shopping Recommender}, year = {2016}, month = {jun}, url = {https://figshare.com/articles/Demo_1_Health-Promoting_Virtual_Shopping_Recommender/3444821}, doi = {10.6084/m9.figshare.3444821.v1}, month_numeric = {6} } @inproceedings{ubo_mods_00116384, author = {Ziegler, Jürgen and Nebeling, Michael and Nigay, Laurence and Campos, José and Winckler, Marco}, editor = {Ziegler, Jürgen}, title = {Welcome to EICS 2015}, booktitle = {Proceedings of the 7th ACM SIGCHI Symposium on Engineering Interactive Computing Systems}, year = {2015}, publisher = {Association for Computing Machinery, Inc}, address = {New York}, pages = {v–vi}, isbn = {978-1-4503-3646-8} } @inproceedings{ubo_mods_00116218, author = {Angenendt, Kristina and Bormann, Jeanny and Donkers, Tim and Goebel, Tabitha and Kizina, Anna and Kleemann, Timm and Michael, Lisa and Raja, Hifsa and Sachs, Franziska and Schneegass, Christina and Sinzig, Lisa-Maria and Steffen, Juliane and Manske, Sven and Hecking, Tobias and Hoppe, Ulrich Heinz}, editor = {Rathmayer, Sabine and Pongratz, Hans}, title = {ConceptCloud -Entwicklung einer Applikation zur Unterstützung von Reflexionsprozessen im Online-Lernportal Go-Lab}, booktitle = {Proceedings of DeLFI Workshops 2015}, series = {CEUR Workshop Proceedings}, year = {2015}, publisher = {CEUR-WS}, address = {Aachen}, volume = {1443}, pages = {132–135}, issn = {1613-0073}, url = {http://ceur-ws.org/Vol-1443/paper26.pdf} } @inproceedings{ubo_mods_00116031, author = {Kötteritzsch, Anna and Bons, Julia and Herrmanny, Katja and Weyers, Benjamin and Dogangün, Aysegül}, title = {Tagungsband des Workshops "Gemeinsam Altern erleben"}, year = {2015}, publisher = {Walter de Gruyter GmbH}, address = {Berlin [u.a.]}, pages = {577–582}, isbn = {9783110443332}, doi = {10.1515/9783110443905} } @phdthesis{ubo_mods_00063188, author = {Joop, Jörn Björn}, title = {Generalisierte Kontextmodellierung auf Basis von Zustandsgraphen: eine Methode zur Ermittlung von Kontexten für einzelne Benutzer und Benutzergruppen}, series = {Schriften zu Kooperations- und Mediensystemen}, year = {2015}, publisher = {Eul Verlag}, address = {Lohmar}, volume = {37}, note = {Zugl.: Universität Duisburg-Essen, Diss., 2015}, isbn = {978-3-8441-0427-1}, school = {University of Duisburg-Essen} } @article{ubo_mods_00060852, author = {Bakhtiyari, Kaveh and Taghavi, Mona and Husain, Hafizah}, title = {Hybrid affective computing: keyboard, mouse and touch screen: from review to experiment}, journal = {Neural computing and applications}, year = {2015}, volume = {26}, number = {6}, pages = {1277–1296}, issn = {0941-0643}, doi = {10.1007/s00521-014-1790-y} } @inproceedings{ubo:67242, author = {Herrmanny, Katja and Gözüyasli, Levent and Deja, Daniel and Ziegler, Jürgen}, chapter = {}, title = {Sensor-based and tangible interaction with a TV community platform for seniors}, year = {2015}, publisher = {ACM}, address = {New York, NY, USA}, pages = {180–189}, isbn = {978-1-4503-3646-8}, doi = {10.1145/2774225.2774849}, booktitle = {Proceedings of the 7th ACM SIGCHI Symposium on Engineering Interactive Computing Systems (EICS ’15)} } @book{ubo:66257, author = {Nebeling, Michael and Ziegler, Jürgen and Nigay, Laurence}, title = {Proceedings of the 7th ACM SIGCHI Symposium on Engineering Interactive Computing Systems, EICS 2015, Duisburg, Germany, June 23-26, 2015}, year = {2015}, publisher = {ACM}, address = {New York, NY, USA}, isbn = {978-1-4503-3646-8} } @article{ubo:58444, author = {Schmidt, Ralf and Brosius, Christoph and Herrmanny, Katja}, title = {Ein Vorgehensmodell für angewandte Spielformen}, journal = {HMD Praxis der Wirtschaftsinformatik}, year = {2015}, number = {online first}, pages = {1–14}, issn = {1436-3011}, doi = {10.1365/s40702-015-0180-y} } @inproceedings{ubo:58169, author = {Kötteritzsch, Anna and Bons, Julia and Herrmanny, Katja and Weyers, Benjamin and Dogangün, Aysegül}, chapter = {}, title = {Tagungsband des Workshops "Gemeinsam Altern erleben"}, year = {2015}, publisher = {De Gruyter Oldenbourg}, address = {Berlin [u.a.]}, isbn = {978-3-11-044390-5}, url = {http://dx.doi.org/10.1515/9783110443905-080}, booktitle = {Mensch und Computer 2015 – Workshopband} } @inproceedings{ubo:57963, author = {Álvarez Márquez, Jesús Omar and Ziegler, Jürgen}, editor = {Abascal, Julio and Barbosa, Simone and Fetter, Mirko and Gross, Tom and Palanque, Philippe and Winckler, Marco}, chapter = {}, title = {Preference Elicitation and Negotiation in a Group Recommender System}, series = {Lecture Notes in Computer Science}, year = {2015}, publisher = {Springer International Publishing}, address = {Cham}, isbn = {978-3-319-22667-5}, url = {http://dx.doi.org/10.1007/978-3-319-22668-2_2}, abstract = {We present a novel approach to group recommender systems that better takes into account the social interaction in a group when formulating, discussing and negotiating the features of the item to be jointly selected. Our approach provides discussion support in a collaborative preference elicitation and negotiation process. Individual preferences are continuously aggregated and immediate feedback of the resulting recommendations is provided. We also support the last stage in the decision process when users collectively select the final item from the recommendation set. The prototype hotel recommender Hootle is developed following these concepts and tested in a user study. The results indicate a higher overall satisfaction with the system as well as a higher perceived recommendation quality when compared against a system version where no negotiation was possible. However, they also indicate that the negotiation-based approach may be more suitable for smaller groups, an aspect that will require further research.}, booktitle = {Human-Computer Interaction – INTERACT 2015: 15th IFIP TC 13 International Conference, Bamberg, Germany, September 14-18, 2015, Proceedings, Part II} } @inproceedings{ubo:57156, author = {Donkers, Tim and Loepp, Benedikt and Ziegler, Jürgen}, chapter = {}, title = {Merging Latent Factors and Tags to Increase Interactive Control of Recommendations}, year = {2015}, abstract = {We describe a novel approach that integrates user-generated tags with standard Matrix Factorization to allow users to interactively control recommendations. The tag information is incorporated during the learning phase and relates to the automatically derived latent factors. Thus, the system can change an item’s score whenever the user adjusts a tag’s weight. We implemented a prototype and performed a user study showing that this seems to be a promising way for users to interactively manipulate the set of items recommended based on their user profile or in cold-start situations.}, url = {http://ceur-ws.org/Vol-1441/recsys2015_poster12.pdf}, booktitle = {Poster Proceedings of the 9th ACM Conference on Recommender Systems (RecSys ’15)} } @inproceedings{ubo:58167, author = {Kettner, Romina and Herrmanny, Katja and Gaulke, Werner}, editor = {Weisbecker, Anette and Burmester, Michael and Schmidt, Albrecht}, chapter = {}, title = {Der IGQ - Ein Messinstrument für die Wirksamkeit von Gamification}, year = {2015}, publisher = {De Gruyter Oldenbourg}, address = {Berlin [u.a.]}, isbn = {978-3-11-044390-5}, url = {http://dx.doi.org/10.1515/9783110443905-052}, booktitle = {Mensch und Computer 2015 – Workshopband} } @inproceedings{ubo:58168, author = {Beckmann, Nils and Dogangün, Aysegül and Herrmanny, Katja and Sauer, Hanno and Kloppenborg, Katharina}, editor = {Weisbecker, Anette and Burmester, Michael and Schmidt, Albrecht}, chapter = {}, title = {Das Projekt PAnalytics – Selbstmonitoring für gesundes Altern}, year = {2015}, publisher = {De Gruyter Oldenbourg}, address = {Berlin [u.a.]}, isbn = {978-3-11-044390-5}, url = {http://dx.doi.org/10.1515/9783110443905-082}, booktitle = {Mensch und Computer 2015 – Workshopband} } @inproceedings{ubo:57124, author = {Kunkel, Johannes and Loepp, Benedikt and Ziegler, Jürgen}, chapter = {}, title = {3D-Visualisierung zur Eingabe von Präferenzen in Empfehlungssystemen}, year = {2015}, pages = {123–132}, publisher = {De Gruyter Oldenbourg}, address = {Berlin}, abstract = {In diesem Beitrag stellen wir ein interaktives Empfehlungssystem vor, bei dem Nutzer ihre Präferenzen in einer dreidimensionalen Visualisierung des Produktraums eingeben können. Die Darstellung in Form einer Landschaft spiegelt dabei das Profil des aktuellen Nutzers wider, und ermöglicht diesem sowohl in Kaltstartsituationen als auch bei der späteren Anpassung eines existierenden Profils interaktiv seine Präferenzen anzugeben. Die Methode basiert auf den von allen Nutzern abgegebenen Bewertungen und benötigt kein inhaltliches Wissen über die Produkte. Die durchgeführte Nutzerstudie zeigt, dass die Visualisierung nachvollziehbar und hilfreich erscheint. Bezüglich der Eingabe von Präferenzen durch Modellierung der Landschaft ergaben sich ebenfalls vielversprechende Ergebnisse, u. a. auch im Hinblick auf User Experience und Empfehlungsqualität.}, doi = {10.1515/9783110443929-014}, url = {http://dx.doi.org/10.1515/9783110443929-014}, booktitle = {Mensch und Computer 2015 – Tagungsband} } @inproceedings{ubo:54813, author = {Gaulke, Werner and Ziegler, Jürgen}, editor = {Ziegler, Jürgen and Nebeling, Michael and Laurence, Nigay}, chapter = {}, title = {Using profiled ontologies to leverage model driven user interface generation}, year = {2015}, publisher = {ACM}, address = {New York, NY, USA}, isbn = {978-1-4503-3646-8}, url = {http://dx.doi.org/10.1145/2774225.2775070}, abstract = {Mobile computing and new input methods have increased the need to create multiple interfaces for one functional core. Automatic generation of user interfaces attempts a solution for this problem. Existing approaches either generate interfaces on the base of a detailed task model or use domain models in conjunction with interface specific annotations and transformation rules. While task models are very time consuming to create and cannot easily be reused domain models lack the flexibility for use cases which are not covered or in conflict with used transformation rules. Based on an overview of existing approaches this paper sets out a conceptual framework which combines both task model and ontology based concepts. It is shown that the proposed combination leads to more abstract and reusable task models.}, booktitle = {Proceedings of the 7th ACM SIGCHI Symposium on Engineering Interactive Computing Systems (EICS ’15)} } @article{ubo:54267, author = {Loepp, Benedikt and Herrmanny, Katja and Ziegler, Jürgen}, title = {Merging Interactive Information Filtering and Recommender Algorithms: Model and Concept Demonstrator}, journal = {i-com}, year = {2015}, volume = {14}, number = {1}, pages = {5–17}, issn = {2196-6826}, doi = {10.1515/icom-2015-0006}, url = {http://dx.doi.org/10.1515/icom-2015-0006}, abstract = {To increase controllability and transparency in recommender systems, recent research has been putting more focus on integrating interactive techniques with recommender algorithms. In this paper, we propose a model of interactive recommending that structures the different interactions users can have with recommender systems. Furthermore, as a novel approach to interactive recommending, we describe a technique that combines faceted information filtering with different algorithmic recommender techniques. We refer to this approach as blended recommending. We also present an interactive movie recommender based on this approach and report on its user-centered design process, in particular an evaluation study in which we compared our system with a standard faceted filtering system. The results indicate a higher level of perceived user control, more detailed preference settings, and better suitability when the search goal is vague.} } @inproceedings{ubo:53366, author = {Loepp, Benedikt and Herrmanny, Katja and Ziegler, Jürgen}, chapter = {}, title = {Blended Recommending: Integrating Interactive Information Filtering and Algorithmic Recommender Techniques}, year = {2015}, publisher = {ACM}, address = {New York, NY, USA}, abstract = {We present a novel approach that integrates algorithmic recommender techniques with interactive faceted filtering methods. We refer to this approach as blended recommending. It allows users to interact with a set of filter facets representing criteria that can serve as input for different recommendation methods including both collaborative and content-based filtering. Users can select filter criteria from these facets and weight them to express their preferences and to exert control over the hybrid recommendation process. In contrast to hard Boolean filtering, the method aggregates the weighted criteria and calculates a ranked list of recommendations that is visualized and immediately updated when users change the filter settings. Based on this approach, we implemented an interactive movie recommender, MyMovieMixer. In a user study, we compared the system with a conventional faceted filtering system that served as a baseline to obtain insights into user interaction behavior and to assess recommendation quality for our system. The results indicate, among other findings, a higher level of perceived user control, more detailed preference settings, and better suitability when the search goal is vague.}, doi = {10.1145/2702123.2702496}, pages = {975–984}, url = {https://dl.acm.org/doi/10.1145/2702123.2702496?cid=87958660357}, booktitle = {Proceedings of the 33rd International Conference on Human Factors in Computing Systems (CHI ’15)} } @article{ubo_mods_00053451, author = {Taghavi, Mona and Bakhtiyari, Kaveh and Taghavi, Hamed and Attar, Olyaee Vahhab and Hussain, Aini}, title = {Planning for sustainable development in the emerging information societies}, journal = {Journal of Science and Technology Policy Management}, year = {2014}, volume = {5}, number = {3}, pages = {178–211}, issn = {2053-4620}, url = {http://www.emeraldinsight.com/doi/full/10.1108/JSTPM-04-2014-0013} } @article{ubo_mods_00080882, author = {Bakhtiyari, Kaveh and Husain, Hafizah}, title = {Fuzzy Model of Dominance Emotions in Affective Computing}, journal = {Journal of Neural Computing and Applications}, year = {2014}, volume = {25}, number = {6}, pages = {1467–1477}, keywords = {Fuzzy}, issn = {0941-0643}, doi = {10.1007/s00521-014-1637-6} } @article{ubo_mods_00054518, author = {Bakhtiyari, Kaveh and Salehi, Hadi and Embi, Amin Mohamed and Shakiba, Masoud and Zavvari, Azam and Shahbazi-Moghadam, Masoomeh and Ebrahim, Ale Nader and Mohammadjafari, Marjan}, title = {Ethical and unethical methods of plagiarism prevention in academic writing}, journal = {International education studies : IES}, year = {2014}, volume = {7}, number = {7}, pages = {52–62}, issn = {1913-9039}, doi = {10.5539/ies.v7n7p52} } @inproceedings{ubo_mods_00091179, author = {Ziegler, Jürgen and Campos, C. J. and Nigay, L.}, editor = {Paterno, Fabio}, chapter = {}, title = {HCI engineering: Charting the way towards methods and tools for advanced interactive systems}, year = {2014}, publisher = {ACM}, address = {New York, NY}, pages = {299–300}, isbn = {978-1-4503-2725-1}, doi = {10.1145/2607023.2610289}, booktitle = {Proceedings of the 2014 ACM SIGCHI symposium on Engineering interactive computing systems} } @article{ziegler2014role, title = {The Role of Semantic Data in Engineering Interactive Systems}, author = {Ziegler, Jürgen and Stegemann, Timo}, journal = {HCI Engineering Charting the Way towards Methods and Tools for Advanced Interactive Systems}, pages = {43}, year = {2014} } @article{ubo_mods_00082812, author = {Hussein, Tim and Linder, Timm and Gaulke, Werner and Ziegler, Jürgen}, title = {Hybreed: a software framework for developing context-aware hybrid recommender systems}, journal = {User modeling and user adapted interaction}, year = {2014}, publisher = {Proquest}, address = {[S.l.]}, volume = {24}, number = {1}, pages = {121–174}, keywords = {Recommender systems}, issn = {1573-1391}, doi = {10.1007/s11257-012-9134-z} } @inproceedings{ubo_mods_00058150, author = {Manske, Sven and Álvarez Márquez, Jesús Omar and Giemza, Adam and Hoppe, Heinz Ulrich}, title = {MuPeT: A framework for enabling multi-perspective problem elaboration}, booktitle = {Proceedings of the 22nd International Conference on Computers in Education, ICCE 2014}, year = {2014}, pages = {218–223}, isbn = {4-9908014-1-0}, url = {http://www.apsce.net/icce/icce2014/?page_id=1193}, abstract = {Creativity techniques gain importance in education and business areas day by day. Beyond the well-known brainstorming, which focuses on divergent thinking, lateral thinking will encourage the individual to regard the situation from a variety of perspectives by breaking old mind patterns and forming new connections and perceptions. Examples like "Six Thinking Hats" or "(Walt) Disney Method" consist of group discussions, where specific roles are assigned to the participants to enforce a discourse with different perspectives. Electronic group discussion systems can compensate the deficits of verbal (face-to-face) discussions through motivating passive discussants to participate. Furthermore, a system can provide a persistent logging of contributions and an explicit representation of a contribution according to the perspective of the participant. We present a novel approach, which allows both authoring and performing such multi-perspective creativity methods. In addition, the participant’s user interface is optimized for mobile devices. Finally we show first results of usability evaluations covering authoring and performing of a created method.} } @inproceedings{BakhtiyariAffective2014, author = {Bakhtiyari, Kaveh and Taghavi, Mona and Husain, Hafizah}, editor = {Nguyen, Ngoc Thanh and Attachoo, Boonwat and Trawiński, Bogdan and Somboonviwat, Kulwadee}, title = {Implementation of Emotional-Aware Computer Systems Using Typical Input Devices}, booktitle = {Proceedings of the 6th Asian Conference on Intelligent Information and Database Systems (ACIIDS ’14)}, year = {2014}, publisher = {Springer International Publishing}, pages = {364–374}, doi = {10.1007/978-3-319-05476-6_37} } @inproceedings{Stegemann14, author = {Stegemann, Timo and Ziegler, Jürgen}, title = {SemwidgJS: A Semantic Widget Library for the Rapid Development of User Interfaces for Linked Open Data}, booktitle = {44. Jahrestagung der Gesellschaft für Informatik, Informatik 2014, Big Data - Komplexität meistern, 22.-26. September 2014 in Stuttgart, Deutschland}, year = {2014}, pages = {479–490}, bibsource = {dblp computer science bibliography, http://dblp.org}, biburl = {http://dblp.dagstuhl.de/rec/bib/conf/gi/StegemannZ14}, timestamp = {Tue, 15 Mar 2016 10:32:20 +0100}, url = {http://subs.emis.de/LNI/Proceedings/Proceedings232/article93.html}, editor = {Plödereder, Erhard and Grunske, Lars and Schneider, Eric and Ull, Dominik}, series = {LNI}, volume = {232}, publisher = {GI}, isbn = {978-3-88579-626-8} } @inproceedings{ubo:49894, author = {Kötteritzsch, Anna and Hornung, Dominik and Herrmanny, Katja and Ksoll, Michael}, editor = {Koch, Michael and Butz, Andreas and Schlichter, Johann}, chapter = {}, title = {Tagungsband des Workshops "Senioren interaktiv unterwegs – (Kooperations-) Systeme gestalten"}, year = {2014}, publisher = {De Gruyter Oldenbourg}, address = {Berlin}, abstract = {Kaum eine Entwicklung wird Deutschland in den kommenden Jahren so prägen wie der demografische Wandel.“ Mit diesem Satz leitete ein Dossier des BMBF das Wissenschaftsjahr 2013 – Die demografische Chance – und damit den ansteigenden gesellschaftlich-politischen Fokus auf Maßnahmen zur Adressierung des demografischen Wandels ein. Gleichzeitig wird mit dem Wissenschaftsjahr 2014 – Die digitale Gesellschaft – ein Trend hinsichtlich der Erforschung von Technologien für ein selbstbestimmtes Leben in einer digitalen Welt aufgegriffen. Forscher und Entwickler im Bereich AAL verfolgen weitreichende Aktivitäten, welche insgesamt darauf abzielen, die Lebensqualität in einer sich wandelnden Gesellschaft durch innovative und praxistaugliche Technologien sicherzustellen. Eine zentrale Herausforderung ist die Identifikation und Sicherung der Rolle(n) älterer Menschen in einer funktionierenden Gesellschaft. Technologische Entwicklungen und Forschungsergebnisse der Mensch-Technik-Interaktion sollen hierzu einen Beitrag leisten. Aufgrund der zunehmenden Technisierung im beruflichen Alltag nimmt der Bereich CSCW einen wachsenden Stellenwert ein, da er unterstützende IKT für erfolgreiche Zusammenarbeit unabhängig von Alter und Erfahrung im beruflichen Alltag aufgreift. Aufgrund der divergierenden Akzeptanz und Kenntnis neuer Technologien unter älteren Menschen steigt die Bedeutung von Fragestellungen im Rahmen des AAL auch unter beruflichen Gesichtspunkten. Eine Herausforderung ist hier verschiedene Potenziale der Zusammenarbeit und der sozialen Interaktion mit den speziellen Anforderungen der Nutzer zu vereinbaren. In Hinblick auf die oben beschriebenen Perspektiven im AAL-Bereich sollen aufbauend auf den Ergebnissen der vergangenen AAL-Workshops auf der M&C Problemstellungen und Lösungsansätze dargelegt sowie neue Potenziale analysiert, diskutiert und dokumentiert werden. Der Workshop zielt ab auf die Erfassung zukünftiger Trends des AAL-Bereichs, insbesondere in Bezug auf den Umgang von Senioren mit Technologien im Rahmen des CSCW, deren Auswirkungen auf psycho-soziale Systeme sowie den interaktiven Austausch über aussichtsreiche Forschungsschwerpunkte und die Vernetzung der beteiligten Akteure.}, isbn = {978-3-11-034450-9}, url = {http://dx.doi.org/10.1524/9783110344509.65}, booktitle = {Mensch & Computer 2014 - Workshopband: 14. fachübergreifende Konferenz für interaktive und kooperative Medien ; Interaktiv unterwegs, Freiräume gestalten} } @inproceedings{ubo:49895, author = {Herrmanny, Katja and Schmidt, Ralf}, editor = {Butz, Andreas and Koch, Michael and Schlichter, Johann}, chapter = {}, title = {Ein Vorgehensmodell zur Entwicklung von Gameful Design für Unternehmen}, year = {2014}, publisher = {De Gruyter Oldenbourg}, address = {Berlin}, abstract = {In diesem Beitrag wird ein Vorgehensmodell für einen nutzerzentrierten Gameful Design Prozess mit dem Ziel, spielerische Softwareanwendungen für den unternehmerischen Kontext zu entwickeln, vor-gestellt. Das neunstufige Modell ist iterativ aufgebaut und kombiniert Elemente klassischer Software-entwicklungsprozesse mit Game Design und nutzerzentriertem Vorgehen. Es wurde anhand eines realen Anwendungsfalls aus der Wirtschaft explorativ entwickelt. Aufgrund der gesammelten Erfah-rungen in der Anwendung, werden Empfehlungen zur Methodenwahl ausgesprochen. Eine Beschränk-ung auf diese Methoden ist jedoch nicht intendiert, um Raum für persönliche Präferenzen des Entwick-lerteams und spezifische Anforderungen des jeweils betrachteten Anwendungsfalls zu gewährleisten.}, isbn = {978-3-11-034450-9}, url = {http://dx.doi.org/10.1524/9783110344509.369}, booktitle = {Mensch & Computer 2014 - Workshopband: 14. fachübergreifende Konferenz für interaktive und kooperative Medien ; Interaktiv unterwegs, Freiräume gestalten} } @phdtheisis{ubo:49563, author = {Lohmann, Steffen}, title = {Conceptualization and Visualization of Tagging and Folksonomies}, year = {2014}, address = {Duisburg, Essen}, abstract = {Tagging ist im vergangenen Jahrzehnt zu einer beliebten Methode für die Indexierung von Inhalten in interaktiven Systemen geworden. Es bietet Nutzern eine einfache und effektive Möglichkeit, immer größere Mengen digitaler Informationen für sich selbst und/oder andere zu organisieren. Das durch Tagging entstehende Vokabular wird als Folksonomie bezeichnet und kann die Suche und Erschließung von digitalen Inhalten hilfreich unterstützen. Obwohl mehrere Modelle und Repräsentationen für Tagging vorgeschlagen wurden, gibt es bislang keine umfassende Beschreibung der Konzepte und Beziehungen des Themengebiets. Zudem existiert wenig systematische Forschung im Bereich der Visualisierung von Folksonomien, so dass diese hauptsächlich in Form einfacher Wortwolken dargestellt werden. Beide Probleme bedingen sich gegenseitig, da eine präzise und konsistente Konzeptualisierung wichtige Voraussetzung für die interoperable Nutzung und Visualisierung von Folksonomien ist. Diese Dissertation setzt sich mit den genannten Problemen auseinander, indem sie eine umfassende Konzeptualisierung für Tagging und Visualisierungen für die interaktive Analyse von Folksonomien entwickelt. Zunächst wird ein Überblick über Tagging-Modelle gegeben und werden wichtige Begriffe des Themengebiets definiert. Nach einer sorgfältigen Analyse vorhandener Tagging-Ontologien wird eine konsistente und wohldefinierte Konzeptualisierung präsentiert, die kompatible Teilbereiche der betrachteten Ontologien aufgreift und vereint. Die Konzeptualisierung ist in einer standardisierten Ontologiebeschreibungssprache implementiert und ermöglicht die Nutzung skalierbarer Reasoning-Verfahren auf Folksonomien. Ausgehend von der Konzeptualisierung untersucht die Dissertation anschließend verschiedene Darstellungsformen für Wortwolken und wie sie Nutzer bei der Informationssuche unterstützen. Es werden visuelle und interaktive Erweiterungen für Wortwolken entwickelt und zu einem Analysesystem integriert, das mit maschineller Sprachverarbeitung und intuitiven Interaktionstechniken ausgestattet ist. Darüber hinaus werden vorhandene Umsetzungen der Darstellung von Folksonomien als Graphen analysisiert und schließlich eine neuartige Graphvisualisierung präsentiert, die die tag-basierte Erschließung von digitalen Inhalten ermöglicht. Die entwickelten Ansätze wurden erfolgreich in verschiedenen Kontexten angewandt. Die Konzeptualisierung kam im Wissens- und Anforderungsmanagement zum Einsatz, die erweiterten Wortwolken halfen bei der visuellen Textanalyse und die neuartige Graphvisualisierung fand in der Bildersuche und Anforderungsanalyse Anwendung. Die Beispiele zeigen die vielfältigen Verwendungsmöglichkeiten der entwickelten Ansätze über das Themengebiet Tagging hinaus und führen zu interessanten Fragestellungen für zukünftige Forschung.}, note = {Duisburg, Essen, Univ., Diss., 2013}, url = {http://duepublico.uni-duisburg-essen.de/servlets/DocumentServlet?id=35802}, school = {University of Duisburg-Essen} } @inproceedings{ubo:48984, author = {Loepp, Benedikt and Ziegler, Jürgen}, chapter = {}, title = {Komplexe Präferenzprofile für intermodale Navigation}, year = {2014}, publisher = {De Gruyter Oldenbourg}, address = {Berlin}, isbn = {978-3-11-034450-9}, doi = {10.1524/9783110344509.191}, url = {http://dx.doi.org/10.1524/9783110344509.191}, pages = {191–198}, abstract = {In diesem Beitrag präsentieren wir Aspekte, die für Nutzer im Kontext intermodaler Navigation von Bedeutung sind und durch komplexe Präferenzprofile abgebildet werden können. Neben einer Herleitung und Klassifikation solch potenzieller Nutzeranforderungen an die Anpassung von Mobilitätsketten − beispielsweise an individuelle Präferenzen wie den energetischen Fußabdruck oder das gewünschte Maß an Komfort – stellen wir einen Prototypen vor, der einen ersten Schritt hin zu einer interaktiven, stark individualisierbaren Unterstützung intermodaler Navigation darstellt. }, booktitle = {Mensch und Computer 2014 – Workshopband} } @inproceedings{ubo:48985, author = {Gaulke, Werner and Ziegler, Jürgen}, editor = {Butz, Andreas and Koch, Michael and Schlichter, Johann}, chapter = {}, title = {Entwicklung semantischer Produktdatenmodelle durch Domänenexperten: Fehleranalyse und Werkzeugunterstützung}, year = {2014}, publisher = {De Gruyter Oldenbourg}, address = {Berlin}, isbn = {978-3-110-34448-6}, url = {http://dl.mensch-und-computer.de/handle/123456789/3801}, abstract = {Semantisch modellierte Daten in Form von Ontologien bilden eine Grundlage für unterschiedlichste intelligente Funktionen, insbesondere ermöglichen sie eine verbesserte Unterstützung bei der Suche und Filterung von Information. Dies gilt auch im Bereich des Electronic Commerce, wo semantische Produktdatenmodelle eine zunehmende Rolle spielen. Typischerweise werden diese Modelle aber von Domänenexperten erstellt, die mit semantischen Modellierungstechniken nicht oder nur wenig vertraut sind. Dieser Beitrag stellt einen auf die E-Commerce-Domäne zugeschnittenen Editor vor, der nicht-technische Benutzer dabei unterstützt, formal und fachlich korrekte Modelle zu erstellen. Auf Grundlage einer erstellten Fehlerklassifizierung wird dieser Editor empirisch mit einer generischen Modellierungs-methode verglichen. Die Ergebnisse zeigen einerseits einen Vorteil des domänenspezifischen Werkzeugs, andererseits werden aus einer Fehleranalyse Gestaltungsvorschläge zur weiteren Optimierung domänenspezifischer Modellierungswerkzeuge abgeleitet.}, booktitle = {Mensch und Computer 2014 - Tagungsband: 14. fachübergreifende Konferenz für interaktive und kooperative Medien ; Interaktiv unterwegs, Freiräume gestalten} } @inproceedings{ubo:48983, author = {Herrmanny, Katja and Schering, Sandra and Berger, Ralf and Loepp, Benedikt and Günter, Timo and Hussein, Tim and Ziegler, Jürgen}, chapter = {}, title = {MyMovieMixer: Ein hybrider Recommender mit visuellem Bedienkonzept}, year = {2014}, publisher = {De Gruyter Oldenbourg}, address = {Berlin}, pages = {45–54}, doi = {10.1524/9783110344486.45}, url = {http://dx.doi.org/10.1524/9783110344486.45}, abstract = {In diesem Beitrag stellen wir ein neuartiges, auf direkter Manipulation beruhendes Bedienkonzept für komplexe hybride Empfehlungssysteme anhand des von uns entwickelten Film-Recommenders MyMovieMixer vor. Der Ansatz ermöglicht es den Nutzern, ein hybrides Recommender-System mit einem komplexen Zusammenwirken verschiedener Filtermethoden durch interaktive und visuelle Methoden intuitiv zu steuern. Gleichzeitig wird die Transparenz der Empfehlungsgenerierung deutlich erhöht. Die Ergebnisse einer empirischen Evaluation des Systems zeigen, dass der Ansatz in Bezug auf Usability, User Experience, Intuitivität, Transparenz, wahrgenommene Empfehlungsqualität und somit letztlich im Hinblick auf die Nutzerzufriedenheit vielversprechend ist. }, booktitle = {Mensch und Computer 2014 – Tagungsband} } @inproceedings{ubo:46601, author = {Loepp, Benedikt and Hussein, Tim and Ziegler, Jürgen}, chapter = {}, title = {Choice-based Preference Elicitation for Collaborative Filtering Recommender Systems}, year = {2014}, pages = {3085–3094}, publisher = {ACM}, address = {New York, NY, USA}, isbn = {978-1-4503-2473-1}, doi = {10.1145/2556288.2557069}, abstract = {We present an approach to interactive recommending that combines the advantages of algorithmic techniques with the benefits of user-controlled, interactive exploration in a novel manner. The method extracts latent factors from a matrix of user rating data as commonly used in Collaborative Filtering, and generates dialogs in which the user iteratively chooses between two sets of sample items. Samples are chosen by the system for low and high values of each latent factor considered. The method positions the user in the latent factor space with few interaction steps, and finally selects items near the user position as recommendations. In a user study, we compare the system with three alternative approaches including manual search and automatic recommending. The results show significant advantages of our approach over the three competing alternatives in 15 out of 24 possible parameter comparisons, in particular with respect to item fit, interaction effort and user control. The findings corroborate our assumption that the proposed method achieves a good trade-off between automated and interactive functions in recommender systems.}, url = {https://dl.acm.org/doi/10.1145/2556288.2557069?cid=87958660357}, booktitle = {Proceedings of the 32nd International Conference on Human Factors in Computing Systems (CHI ’14)} } @phdthesis{ubo:45269, author = {Niesenhaus, Jörg}, title = {Visuell unterstützte Entwicklung von Spielprototypen}, year = {2014}, edition = {1. Aufl.}, publisher = {Hut}, address = {München}, note = {Zugl: Duisburg, Essen, Univ., Diss., 2013}, isbn = {978-3-8439-1389-8}, abstract = {Diese Dissertation stellt neue Techniken zur Generierung von Spielregeln im Rahmen eines experimentellen Game Prototyping Frameworks vor, welches Nutzern ermöglicht ihre Spielideen innerhalb von wenigen Minuten zu implementieren und zu testen. Der Hauptzweck des Frameworks ist die Evaluation verschiedener Interaktionstechniken sowie unterschiedlicher Methoden des Programming by Demonstration und der visuellen Programmierung hinsichtlich ihrer Eignung für das Rapid Game Prototyping. Darüber hinaus bietet dieses Buch einen umfassenden Überblick über den State of the Art im Bereich der Game Prototyping Tools und der visuellen Programmierumgebungen und stellt eine vergleichende Studie mehrerer populärer visueller Programmierwerkzeuge vor.} } @article{ubo:42845, author = {Hussein, Tim and Linder, Timm and Gaulke, Werner and Ziegler, Jürgen}, title = {Hybreed: A Software Framework for Developing Context-Aware Hybrid Recommender Systems}, journal = {User modeling and user adapted interaction}, abstract = {This article introduces Hybreed, a software framework for building complex context-aware applications, together with a set of components that are specifically targeted at developing hybrid, context-aware recommender systems. Hybreed is based on a concept for processing context that we call Dynamic Contextualization. The underlying notion of context is very generic, enabling application developers to exploit sensor-based physical factors as well as factors derived from user models or user interaction. This approach is well aligned with context definitions that emphasize the dynamic and activity-oriented nature of context. As an extension of the generic framework, we describe Hybreed RecViews, a set of components facilitating the development of context-aware and hybrid recommender systems. With Hybreed and RecViews, developers can rapidly develop context-aware applications that generate recommendations for both individual users and groups. The framework provides a range of recommendation algorithms and strategies for producing group recommendations as well as templates for combining different methods into hybrid recommenders. Hybreed also provides means for integrating existing user or product data from external sources such as social networks. It combines aspects known from context processing frameworks with features of state-of-the-art recommender system frameworks, aspects that have been addressed only separately in previous research. To our knowledge, Hybreed is the first framework to cover all these aspects in an integrated manner. To evaluate the framework and its conceptual foundation, we verified its capabilities in three different use cases. The evaluation also comprises a comparative assessment of Hybreed’s functional features, a comparison to existing frameworks, and a user study assessing its usability for developers. The results of this study indicate that Hybreed is intuitive to use and extend by developers.}, year = {2014}, volume = {24}, number = {1}, pages = {121–174}, issn = {1573-1391}, doi = {10.1007/s11257-012-9134-z} } @phdthesis{ubo_mods_00041567, author = {Bai, Fan}, title = {Collaboration support for the distributed development of ontologies}, series = {Schriften zu Kooperations- und Mediensystemen}, year = {2013}, edition = {1. Aufl.}, publisher = {Eul}, address = {Lohmar}, volume = {33}, note = {Zugl.: Duisburg, Essen, Univ., Diss., 2012}, isbn = {978-3-8441-0228-4}, school = {University of Duisburg-Essen} } @incollection{ubo_mods_00080806, author = {Taghavi, Mona and Bakhtiyari, Kaveh and Scavino, Edgar}, title = {Agent-based Computational Investing Recommender System}, booktitle = {Proceedings of the 7th ACM Conference on Recommender Systems}, series = {RecSys ’13}, year = {2013}, isbn = {978-1-4503-2409-0}, location = {Hong Kong, China}, pages = {455–458}, numpages = {4}, url = {http://doi.acm.org/10.1145/2507157.2508072}, doi = {10.1145/2507157.2508072}, acmid = {2508072}, publisher = {ACM}, address = {New York, NY, USA}, keywords = {computational investing, hybrid filtering, multi-agent system, recommender system, stock market} } @inproceedings{ubo:42957, author = {Hierhammer, Christian and Herrmanny, Katja}, editor = {Boll, Susanne and Maaß, Susanne and Malaka, Rainer}, chapter = {}, title = {Gamification für ältere Menschen – Potenziale und Herausforderungen}, year = {2013}, publisher = {Oldenbourg}, address = {München}, isbn = {978-3-486-78123-6}, booktitle = {Mensch & Computer 2013 - Workshopband: 13. fachübergreifende Konferenz für interaktive und kooperative Medien} } @inproceedings{ubo:42955, author = {Herrmanny, Katja}, editor = {Bengesser, Cathrin and Tekster, Thomas}, chapter = {}, title = {Das Projekt FoSIBLE – soziale Interaktionsförderung durch interaktives Fernsehen}, series = {Schriftenreihe zur digitalen Gesellschaft NRW}, year = {2013}, publisher = {kopaed}, address = {München}, abstract = {Das laufende Projekt FoSIBLE beschäftigt sich mit technologischen Lösungen, zur Minimierung von Alterseinsamkeit und sozialer Isolation, indem sie soziale Interaktion fördern. Dabei interagieren die Nutzerinnen und Nutzer in einem geschlossenen sozialen Netzwerk über einen internetfähigen Fernseher miteinander. Dieses soziale Netzwerk stellt ihnen verschiedene, gängige Interaktionselemente zur Verfügung wie die Anzeige der anderen vernetzten Personen, die gerade online sind, das Senden von Nachrichten, Chats, Gruppen etc. Zusätzlich fließen in dieses Netzwerk interaktionsfördernde Inhalte ein, die aus Sensordaten aus der Wohnumgebung abgeleitet werden. Neben der Gestaltung, Umsetzung und wissenschaftlichen Untersuchung innovativer Interaktionskonzepte für ältere Menschen ist auch die damit verbundene Privatsphäre-Thematik ein wichtiges Element der Forschung. Die derzeitigen Forschungsergebnisse sind positiv im Hinblick auf das Potenzial der entwickelten Interaktionskonzepte für ältere Personen.}, isbn = {978-3-86736-401-0}, booktitle = {Senioren im Web 2.0: Beiträge zu Nutzung und Nutzen von Social Media im Alter} } @inproceedings{ubo:42958, author = {Braier, Jonas and Burkhard, Martin and Herrmanny, Katja and Koch, Michael and Kötteritzsch, Anna and Müller, Claudia and Nutsi, Andrea and Richter, Alexander and Schering, Sandra and Wulf, Volker and Ziegler, Jürgen}, editor = {Boll, Susanne and Maaß, Susanne and Malaka, Rainer}, chapter = {}, title = {AAL-Workshop "Lachen kennt kein Alter"}, year = {2013}, publisher = {Oldenbourg}, address = {München}, isbn = {978-3-486-78123-6}, booktitle = {Mensch & Computer 2013 – Workshopband: 13. fachübergreifende Konferenz für interaktive und kooperative Medien} } @book{ubo:42846, author = {Hussein, Tim}, title = {A conceptual model and a software framework for developing context aware hybrid recommender systems}, year = {2013}, publisher = {Hut}, address = {München}, abstract = {This thesis introduces Hybreed, a software framework for building context-aware applications, together with a set of components that are specifically targeted at developing hybrid, context-aware recommender systems. Hybreed is based on a conceptual model called Dynamic Contextualization, which is also introduced in this thesis. The underlying notion of context is very generic, enabling application developers to exploit sensor-based physical factors as well as factors derived from user models or user-system interaction. This approach is well aligned with context definitions that emphasize the dynamic and activity-oriented nature of context. As an extension of the generic framework, Hybreed RecViews is introduced, a set of components facilitating the development of context-aware and hybrid recommender systems. With Hybreed and RecViews, developers can rapidly develop context-aware applications that generate recommendations for both individual users and groups.}, isbn = {978-3-8439-1188-7}, school = {University of Duisburg-Essen} } @inproceedings{ubo:42827, author = {Kaindl, Hermann and Wach, Elmar and Okoli, Ada and Popp, Roman and Hoch, Ralph and Gaulke, Werner and Hussein, Tim}, chapter = {}, title = {Semi-automatic generation of recommendation processes and their GUIs}, year = {2013}, publisher = {ACM}, abstract = {Creating and optimizing content- and dialogue-based recommendation processes and their GUIs (graphical user interfaces) manually is expensive and slow. Changes in the environment may also be found too late or even be overlooked by humans. We show how to generate such processes and their GUIs semi-automatically by using knowledge derived from unstructured data such as customer feedback on products on the Web. Our approach covers the whole lifecycle from knowledge discovery through text mining techniques to the use of this knowledge for semi-automatic generation of recommendation processes and their user interfaces as well as their comparison in real-world use within the e-commerce domain through A/B-variant tests. These tests indicate that our approach can lead to better results as well as less manual effort.}, isbn = {978-1-4503-1965-2}, url = {http://dx.doi.org/10.1145/2449396.2449410}, booktitle = {Proceedings of the 18th International Conference on Intelligent User Interfaces (IUI ’13)} } @book{ubo:42843, editor = {Hussein, Tim and Paulheim, Heiko and Lukosch, Stephan and Ziegler, Jürgen and Calvary, Gaelle}, title = {Semantic Models for Adaptive Interactive Systems}, series = {Human–Computer Interaction Series}, year = {2013}, publisher = {Springer}, address = {London [u.a.]}, abstract = {Providing insights into methodologies for designing adaptive systems based on semantic data, and introducing semantic models that can be used for building interactive systems, this book showcases many of the applications made possible by the use of semantic models. Ontologies may enhance the functional coverage of an interactive system as well as its visualization and interaction capabilities in various ways. Semantic models can also contribute to bridging gaps; for example, between user models, context-aware interfaces, and model-driven UI generation. There is considerable potential for using semantic models as a basis for adaptive interactive systems. A variety of reasoning and machine learning techniques exist that can be employed to achieve adaptive system behavior. The advent and rapid growth of Linked Open Data as a large-scale collection of semantic data has also paved the way for a new breed of intelligent, knowledge-intensive applications. Semantic Models for Adaptive Interactive Systems includes ten complementary chapters written by experts from both industry and academia. Rounded off by a number of case studies in real world application domains, this book will serve as a valuable reference for researchers and practitioners exploring the use of semantic models within HCI.}, isbn = {978-1-4471-5301-6}, url = {http://dx.doi.org/10.1007/978-1-4471-5301-6} } @inproceedings{ubo:42828, author = {Loepp, Benedikt and Hussein, Tim and Ziegler, Jürgen}, chapter = {}, title = {Interaktive Empfehlungsgenerierung mit Hilfe latenter Produktfaktoren}, year = {2013}, publisher = {Oldenbourg}, address = {München}, abstract = {In diesem Beitrag beschreiben wir ein Verfahren zur Generierung interaktiver Empfehlungsdialoge auf Basis latenter Produktfaktoren. Der Ansatz verbindet auf neuartige Weise Methoden zur automatischen Generierung von Empfehlungen mit interaktiven, explorativen Methoden der Produktsuche. Das vorgestellte Verfahren nutzt verborgene Muster in Produktbewertungen (latente Faktoren) und erzeugt auf dieser Basis visuelle Dialoge, die den Nutzer schrittweise und intuitiv durch einen Explorationsprozess führen. In einer Nutzerstudie konnten wir zeigen, dass ein derartiger interaktiver Empfehlungsprozess hinsichtlich des Aufwandes und der Zufriedenheit mit den erzielten Resultaten eine deutliche Verbesserung gegenüber rein manuellen oder rein automatischen Verfahren bieten kann.}, pages = {17–26}, doi = {10.1524/9783486781229.17}, url = {http://dx.doi.org/10.1524/9783486781229.17}, booktitle = {Mensch & Computer 2013 – Tagungsband} } @inproceedings{ubo:42844, author = {Hussein, Tim and Linder, Timm and Ziegler, Jürgen}, editor = {Hussein, Tim and Paulheim, Heiko and Lukosch, Stephan and Ziegler, Jürgen and Calvary, Gaelle}, chapter = {}, title = {A Context-Aware Shopping Portal Based on Semantic Models}, series = {Human-Computer Interaction Series}, year = {2013}, publisher = {Springer}, address = {London}, abstract = {This chapter illustrates how semantic models can be used as a backend data source for both exploration and adaptation purposes. For a fictitious shopping portal, we implemented a faceted navigation approach that provides means for exploring the portal’s content manually. In addition to that, we implemented an adaptation mechanism based on spreading activation that also exploits the semantic structure of the underlying data.}, isbn = {978-1-4471-5301-6}, url = {http://dx.doi.org/10.1007/978-1-4471-5301-6_8}, booktitle = {Semantic Models for Adaptive Interactive Systems} } @book{ubo:42775, author = {Münter, Daniel}, title = {Fahrer- und situationsgerechte Navigationsunterstützung im Fahrzeug}, year = {2013}, edition = {1. Aufl.}, publisher = {Hut}, address = {München}, note = {Zugl.: Duisburg, Essen, Univ., Diss., 2013}, isbn = {978-3-8439-1164-1}, school = {University of Duisburg-Essen} } @inproceedings{ubo:38906, author = {Bayen, J. Ute and Dogangün, Aysegül and Grundgeiger, Tobias and Haese, André and Stockmanns, Gudrun and Ziegler, Jürgen}, chapter = {}, title = {Evaluating the effectiveness of a memory aid system}, year = {2013}, volume = {59}, number = {1}, pages = {77–84}, issn = {1423-0003}, url = {http://dx.doi.org/10.1159/000339096}, booktitle = {Gerontology : international journal of experimental and clinical gerontology} } @inproceedings{ubo_mods_00193954, author = {Nolte, Alexander and Prilla, Michael}, editor = {Herskovic, Valeria and Hoppe, H. Ulrich and Ziegler, Jürgen and Jansen, Marc}, title = {Normal Users Cooperating on Process Models: Is It Possible at All?}, booktitle = {Collaboration and Technology: Proceedings}, series = {Lecture Notes in Computer Science (LNISA)}, year = {2012}, publisher = {Springer}, address = {Berlin}, volume = {7493}, pages = {57–72}, keywords = {Cooperation support; process models; lay modeling}, isbn = {978-3-642-33283-8}, doi = {10.1007/978-3-642-33284-5_5}, url = {https://doi.org/10.1007/978-3-642-33284-5_5}, language = {en} } @inproceedings{ubo_mods_00193669, author = {Prilla, Michael}, editor = {Herskovic, Valeria and Hoppe, Heinz Ulrich and Ziegler, Jürgen and Jansen, Marc}, title = {Supporting social tasks of individuals: A matter of access to cooperation systems}, booktitle = {Collaboration and Technology (CRIWG 2012): Proceedings}, series = {Lecture Notes in Computer Science (LNISA)}, year = {2012}, publisher = {Springer}, address = {Berlin}, volume = {7493}, pages = {89–96}, keywords = {Cooperation System; Design Quality; Text Input; Technology Usage; Usage Context}, isbn = {978-3-642-33283-8}, doi = {10.1007/978-3-642-33284-5_7}, url = {https://doi.org/10.1007/978-3-642-33284-5_7}, language = {en} } @inproceedings{ubo_mods_00116803, author = {Ziebarth, Sabrina and Malzahn, Nils and Hoppe, Ulrich Heinz}, editor = {Herskovic, Valeria and Hoppe, Ulrich Heinz and Jansen, Marc and Ziegler, Jürgen}, title = {Matchballs – A multi-agent-system for ontology-based collaborative learning games}, booktitle = {Collaboration and Technology: Proceedings}, series = {Lecture Notes in Computer Science}, year = {2012}, publisher = {Springer Berlin Heidelberg}, address = {Berlin [u.a.]}, volume = {7493}, pages = {208–222}, keywords = {Serious Games}, isbn = {978-3-642-33284-5}, issn = {1611-3349}, doi = {10.1007/978-3-642-33284-5} } @inproceedings{ubo_mods_00116802, author = {Weyers, Benjamin and Luther, Wolfram and Baloian, Nelson and Pino, A. Jose}, editor = {Herskovic, Valeria and Hoppe, Ulrich Heinz and Jansen, Marc and Ziegler, Jürgen}, title = {Formal modeling of multi-user interfaces in cooperative work}, booktitle = {Collaboration and Technology: Proceedings}, series = {Lecture Notes in Computer Science}, year = {2012}, publisher = {Springer Berlin Heidelberg}, address = {Berlin [u.a.]}, volume = {7493}, pages = {129–136}, keywords = {Multi-user interfaces}, isbn = {978-3-642-33284-5}, issn = {1611-3349}, doi = {10.1007/978-3-642-33284-5} } @inproceedings{ubo_mods_00116804, author = {Bollen, Lars and Eimler, C. Sabrina and Jansen, Marc and Engler, Jan}, editor = {Herskovic, Valeria and Hoppe, Ulrich Heinz and Jansen, Marc and Ziegler, Jürgen}, title = {Enabling and Evaluating Mobile Learning Scenarios with Multiple Input Channels}, booktitle = {Collaboration and Technology: Proceedings}, series = {Lecture Notes in Computer Science}, year = {2012}, publisher = {Springer Berlin Heidelberg}, address = {Berlin [u.a.]}, volume = {7493}, pages = {161–175}, keywords = {visualization}, isbn = {978-3-642-33284-5}, issn = {1611-3349}, doi = {10.1007/978-3-642-33284-5} } @inproceedings{ubo_mods_00116550, author = {Hussein, Tim and Lukosch, Stephan and Paulheim, Heiko and Ziegler, Jürgen and Calvary, Gaëlle}, title = {3rd Workshop on Semantic Models for Adaptive Interactive Systems (SEMAIS)}, booktitle = {IUI 2012: Proceedings of the 17th International Conference on Intelligent User Interfaces}, year = {2012}, publisher = {ACM}, address = {New York, NY}, pages = {401–403}, keywords = {Usability}, isbn = {9781450310482}, doi = {10.1145/2166966.2167059} } @phdthesis{ubo_mods_00037714, author = {Dogangün, Aysegül}, title = {Adaptive Awareness-Assistenten: Entwicklung und empirische Untersuchung der Wirksamkeit}, series = {Schriften zu Kooperations- und Mediensystemen}, year = {2012}, publisher = {Eul}, address = {Lohmar}, volume = {32}, note = {Zugl.: Duisburg-Essen, Univ., Diss., 2012 u.d.T.: Do?angün, Ay?egül: Entwicklung von adaptiven Awareness-Assistenten und Quantifizierung der Wirksamkeit}, isbn = {978-3-8441-0187-4}, school = {University of Duisburg-Essen} } @book{ubo_mods_00046118, author = {Proff, Heike and Schönharting, Jörg and Schramm, Dieter and Ziegler, Jürgen}, title = {Zukünftige Entwicklungen in der Mobilität : betriebswirtschaftliche und technische Aspekte ; [... Beiträge des 3. Wissenschaftsforums Mobilität, das im Juli 2011 an der Universität Duisburg-Essen stattfand]}, year = {2012}, publisher = {Gabler}, address = {Wiesbaden}, isbn = {978-3-8349-3232-7}, doi = {10.1007/978-3-8349-7117-3} } @inproceedings{ubo_mods_00075398, author = {Emmerich, Katharina and Neuwald, Katja and Othlinghaus, Julia and Ziebarth, Sabrina and Hoppe, Ulrich Heinz}, editor = {Ziegler, Jürgen and Jansen, Marc and Hoppe, Ulrich Heinz and Herskovic, Valeria}, chapter = {}, title = {Training conflict management in a collaborative virtual environment}, series = {Lecture Notes in Computer Science}, year = {2012}, publisher = {Springer}, address = {Berlin}, volume = {7493}, pages = {17–32}, isbn = {978-3-642-33283-8}, doi = {10.1007/978-3-642-33284-5}, booktitle = {Collaboration and Technology: 18th International Conference, CRIWG 2012 Raesfeld, Germany, September 16-19, 2012 Proceedings} } @book{ubo:75512, author = {18th International Conference, CRIWG 2012 Raesfeld, Germany, September 16-19, 2012}, editor = {Ziegler, Jürgen and Jansen, Marc and Hoppe, Ulrich Heinz and Herskovic, Valeria}, title = {Collaboration and Technology: 18th International Conference, CRIWG 2012 Raesfeld, Germany, September 16-19, 2012 Proceedings}, series = {Lecture Notes in Computer Science}, year = {2012}, publisher = {Springer}, address = {Berlin}, volume = {7493}, isbn = {978-3-642-33283-8}, doi = {10.1007/978-3-642-33284-5} } @inproceedings{ubo:39044, author = {Münter, Daniel and Kötteritzsch, Anna and Islinger, Tobias and Köhler, Thorsten and Wolff, Christian and Ziegler, Jürgen}, editor = {Kun, L. Andrew}, chapter = {}, title = {Improving navigation support by taking care of drivers’ situational needs}, year = {2012}, publisher = {ACM}, address = {Portsmouth, NH, USA}, abstract = {Current in-car navigation systems provide only a limited level of adaption to the driver and driving conditions. The driver’s actual information need while interacting with the navigation interface is not taken into account. This paper aims at investigating the impact of situational features on the drivers’ support need as well as proposing modes of adaptation for situation-aware navigation support. Therefore, three studies were conducted. It became evident that the driver’s need for more or less navigation support depends on the complex interplay of different characteristics of the driver, the vehicle, and the driving environment. Based on our findings, a set of driving situation related adaption rules for a more user centered navigation support is proposed.}, isbn = {978-1-4503-1751-1}, url = {http://dx.doi.org/10.1145/2390256.2390278}, booktitle = {AutomotiveUI ’12: Proceedings of the 4th International Conference on Automotive User Interfaces and Interactive Vehicular Applications} } @inproceedings{ubo:37652, author = {Müller, Claudia and Kötteritzsch, Anna and Budweg, Steffen}, editor = {Deutscher AAL-Kongress mit Ausstellung ; 5 <2012, Berlin> and <Berlin>, VDI-VDE Innovation +. Technik GmbH}, chapter = {}, title = {Technologische Komponenten von heute als Aushandlungsartefakte für neue Kompositionen von morgen – Erfahrungen und Ergebnisse aus dem AAL- Projekt FoSIBLE}, year = {2012}, publisher = {VDE Verlag}, address = {Berlin [u.a.]}, abstract = {Die Herausforderungen der Technikfolgenforschung innerhalb der AAL-Domäne spiegeln sich in ähnlicher Weise in den einzelnen AAL-Entwicklungsprojekten wider. Sowohl auf einer Makroebene also auch auf der Mikro- (projektbasierten) Ebene besteht jeweils die Anforderung, in der Zusammenschau aus derzeitigem Stand der Technik und zukunftsorien-tierten Nutzungs- und Nutzerkonzeptionen verlässliche längerfristige Prognosen zu erstellen. Die frühe Einbindung einer Endnutzer-Perspektive in AAL-Innovationsprozesse gilt als wichtige Maßnahme in Tech-nikprojekten, um Produkte praxis- und nutzerfreundlich und damit markttauglich zu gestalten [1,2]. Nutzerorientierte Methoden liegen dabei in einer weiten Variationsbreite vor, von Simulation und Modellierung der Bedarfe von Senioren in der Usability-Forschung bis hin zur direkten Integration von älteren Menschen, z.B. in Living Lab-Ansätzen [3,4]. Die konkrete Ausgestaltung der nutzerorientierten Forschung unter dem Living Lab-Label zeigt sich wiederum varianten-reich, ebenso in der Intensität des Beziehungsaufbaus zu Endnutzergruppen. So ist der Begriff bisher hauptsächlich kon-notiert mit Einrichtungen, in denen Anwendungen im Laborumfeld mit Probanden unter möglichst praxisnahen Bedin-gungen erprobt werden [5]. Demgegenüber verfolgt das FoSIBLE-Projekt einen Living Lab-Ansatz, der die Freizeit- und Wohnräume der Endnutzer als testbed für technologische Prototypen verortet. Damit ist das Projekt im Umfeld der Nut-zer präsent und die Potentiale für den Aufbau eines dauerhaften Aushandlungs- und Kommunikationsraumes sind hoch. Damit dies gelingt, sind besondere sozio-technische Begleitmaßnahmen notwendig, die im Folgenden beschrieben werden.}, isbn = {978-3-8007-3400-9}, url = {http://www.vde-verlag.de/proceedings-de/453400084.html}, booktitle = {Technik für ein selbstbestimmtes Leben : 5. Deutscher AAL-Kongress mit Ausstellung, 24. - 25. Januar 2012, Berlin ; Tagungsbeiträge} } @inproceedings{ubo:37648, author = {Herrmanny, Katja and Budweg, Steffen and Klauser, Matthias and Kötteritzsch, Anna}, editor = {Arbanowski, Stefan and Steglich, Stephan and Knoche, Hendrik and Hess, Jan}, chapter = {}, title = {Gameinsam – A playful application fostering distributed family interaction on TV}, year = {2012}, publisher = {Fraunhofer FOKUS}, address = {Berlin}, abstract = {In this paper, we describe the concept and the prototype implementation of an interactive TV application which aims to enrich everyday TV-watching with playful interaction components, in particular to meet the demand of elderly people to keep in touch with their peers and family members, even if living apart.}, isbn = {978-3-00-038715-9}, url = {http://www.euroitv2012.org/AdjProc_EuroITV2012.pdf}, booktitle = {EuroITV 2012, Bridging People, Places and Platforms. Adjunct proceedings: 10th European Interactive TV Conference, Berlin, July 4-6, 2012} } @inproceedings{ubo:37650, author = {Schering, Sandra and Budweg, Steffen}, editor = {Reiterer, Harald and Deussen, Oliver}, chapter = {}, title = {Exploring the Desire to Get in Touch through Social TV Applications}, year = {2012}, publisher = {Oldenbourg}, address = {München}, abstract = {Social TVs aim to offer people the possibility to stay in touch with family and friends, supporting intergenerational experiences of social presence and awareness. While multiple approaches exist to support the social experience of watching TV (virtually) together, many available systems have focused on classic features such as buddy lists for peripheral user visualization. In addition, research on Social TV has often treated ‘watching television’ as a generic situation instead of taking the various different genres into account. This paper presents a study that compares three peripheral visualizations of recipients at remote locations while watching TV depending on the genre. Our initial results show that peripheral awareness information can support the feeling of watching television (virtually) together. Furthermore, TV genre plays a central role and should be taken into account when developing Social TV applications for intergenerational exchange.}, isbn = {3-486-71879-7}, url = {http://dl.mensch-und-computer.de/handle/123456789/2972}, booktitle = {Mensch & Computer 2012 : 12. fachübergreifende Konferenz für interaktive und kooperative Medien} } @inproceedings{ubo:37649, author = {Budweg, Steffen and Burkhard, Martin and Koch, Michael and Kötteritzsch, Anna and Richter, Alexander and Ziegler, Jürgen}, editor = {Reiterer, Harald and Deussen, Oliver}, chapter = {}, title = {AAL: Interaktiv. Sozial. Intergenerational?}, year = {2012}, publisher = {Oldenbourg}, address = {München}, abstract = {Seit 2007 fördert das transnationale ?Ambient Assisted Living Joint Programme (AAL-JP)“ innovative Konzepte, Produkte und Dienstleistungen zur Sicherung der Lebensqualität einer alternden Gesellschaft in Europa. Im Mittelpunkt stehen die Entwicklung, Bereitstellung und Evaluation von Informations- und Kommunikationstechnologien (IKT) und damit verbundenen Dienstleistungen zur Stärkung der Selbstbestimmung und Autonomie älterer Menschen. Vor diesem Hintergrund wurden eine Vielzahl an Forschungs- und Praxisprojekten etabliert, mit dem Ziel ältere Menschen in ihrem täglichen Leben zu unterstützen.}, isbn = {978-3-486-71879-9}, url = {http://dl.mensch-und-computer.de/handle/123456789/2939}, booktitle = {Mensch & Computer 2012 : 12. fachübergreifende Konferenz für interaktive und kooperative Medien} } @inproceedings{ubo:37324, author = {Münter, Daniel and Kötteritzsch, Anna and Linder, Timm and Hofmann, Jens and Hussein, Tim and Ziegler, Jürgen}, editor = {Reiterer, Harald and Deussen, Oliver}, chapter = {}, title = {Einflussfaktoren für eine situationsgerechte Navigationsunterstützung im Fahrzeug}, series = {Mensch & Computer}, year = {2012}, edition = {1. Aufl.}, publisher = {Oldenbourg Verlag}, address = {München}, abstract = {Aktuelle Navigationslösungen im Automobil ermöglichen nur eine sehr eingeschränkte Anpassung an Fahrer und Fahrsituation. Anzahl und Aufbereitung von Fahranweisungen sind teils unzureichend verständlich und können den Fahrer kognitiv stark beanspruchen. Dieser Beitrag stellt eine Studie vor, in der ein Bedarf nach fahrer- und situationsabhängiger Optimierung von Navigationslösungen sowie die dafür relevanten Einflussfaktoren identifiziert wurden. Dazu wurden Merkmale zur Charakterisierung von Fahrsituationen betrachtet und deren jeweiliger Einfluss auf das Unterstützungsbedürfnis des Fahrers untersucht. Es konnte gezeigt werden, dass das Nutzerbedürfnis nach mehr oder weniger Unterstützung vom komplexen Zusammenspiel unterschiedlicher Eigenschaften des Fahrers, des Fahrzeugs und der Fahrumgebung abhängt. Anhand der Untersuchungsergebnisse werden Vorschläge für eine situationsangemessene Navigationsunterstützung diskutiert.}, isbn = {978-3-486-71879-9}, url = {http://dl.mensch-und-computer.de/handle/123456789/2874}, booktitle = {Mensch & Computer 2012: 12. fachübergreifende Konferenz für interaktive und kooperative Medien. Interaktiv informiert – allgegenwärtig und allumfassend!?} } @inproceedings{ubo:37328, author = {Klauser, Matthias and Kötteritzsch, Anna and Niesenhaus, Jörg and Budweg, Steffen}, editor = {Reiterer, Harald and Deussen, Oliver}, chapter = {}, title = {Analysis and Classification of Serious Games for Elderly}, year = {2012}, publisher = {Oldenbourg Verl.}, address = {München}, abstract = {Serious games aim at providing benefits beyond pure entertainment and are a growing area of research. Furthermore, not only the number of serious games increases but also the range of application areas. Today, serious games address physical cognitive social and psychological needs for a different target audience with multiple devices. Serious games are often classified by benefits or purpose within a specific application area, but classifications focused on different user- and game-specific aspects are still rare. In this paper we provide an overview on a selection of serious games for elderly people by extracting and summarizing common categories used to classify games on a general level and especially serious games. Furthermore, a collection of serious games for elderly based on literature research as well as a classification using the summarized categories is presented. By those means, serious games for elderly shall be structured and not sufficiently covered approaches of providing benefits be identified.}, isbn = {978-3-486-71879-9}, booktitle = {Mensch & Computer 2012: 12. fachübergreifende Konferenz für interaktive und kooperative Medien. Interaktiv informiert – allgegenwärtig und allumfassend!?} } @inproceedings{ubo:37329, author = {Niesenhaus, Jörg and Kahraman, Burak and Klatt, Johannes}, editor = {Reiterer, Harald and Deussen, Oliver}, chapter = {}, title = {2DGree: Rapid Prototyping for Games}, year = {2012}, publisher = {Oldenbourg Verl.}, address = {München}, abstract = {This paper introduces 2DGree, an experimental game prototyping framework, which enables users to implement and playtest their game ideas within minutes. The framework’s main purpose is the evaluation of different interaction techniques as well as methods of programming by demonstration and visual programming for the application within the context of rapid game prototyping. The core of the 2DGree framework consists of a game world editor tool and a script editor, which can be connected to further components like game asset sharing platforms or evaluation tools. The paper describes the current stage of the framework development, presents a user test and provides an outlook on the future plans for the framework development and application.}, isbn = {978-3-486-71879-9}, booktitle = {Mensch & Computer 2012: 12. fachübergreifende Konferenz für interaktive und kooperative Medien. Interaktiv informiert – allgegenwärtig und allumfassend!?} } @inproceedings{ubo:36047, author = {Stegemann, Timo and Ziegler, Jürgen and Hussein, Tim and Gaulke, Werner}, chapter = {}, title = {Interactive Construction of Semantic Widgets for Visualizing Semantic Web Data}, year = {2012}, publisher = {ACM New York, NY, USA}, abstract = {The rapidly growing amount of semantically represented data on the Web creates the need for more intuitive methods and tools to interact with these data and to use them in standard Web applications. We present a method how users can interactively define personalized views of large semantic data spaces. Specifically, we propose X3S as a technique and format for specifying ‘semantic widgets’ that integrate querying and filtering of semantic data with defining their layout and presentation style. In addition, an editor has been developed that allows to create X3S templates in a direct manipulation style. The editor and the underlying format are evaluated against existing approaches by comparing their functional capabilities as well as in an initial user study.}, isbn = {978-1-4503-1168-7}, url = {http://doi.acm.org/10.1145/2305484.2305510}, booktitle = {Proceedings of the 4th ACM SIGCHI Symposium on Engineering Interactive Computing Systems} } @inproceedings{Munter:2012, author = {Münter, Daniel and Hussein, Tim and Gaulke, Werner and Ziegler, Jürgen}, title = {Service-Based Recommendations for Context-Aware Navigation Support}, booktitle = {Zukünftige Entwicklungen in der Mobilität: Betriebswirtschaftliche und Technische Aspekte - Tagungsband des 3. Wissenschaftsforum Mobilität}, edition = {1. Auflage}, editor = {Proff, Heike and Schönharting, Jörg and Schramm, Dieter and Ziegler, Jürgen}, isbn = {978-3-8349-3232-7}, publisher = {Gabler Verlag}, address = {Wiesbaden}, url = {http://www.gabler.de/Buch/978-3-8349-3232-7/}, year = {2012}, abstract = {In this paper, we introduce a novel concept for service integration into navigation systems. Our approach incorporates contextual information (such as the current location or route) as well as information retrieved from web-based services such as hotel ratings or gas prices. We present a generic framework that can be used to design navigation systems based on such information and describe a prototypical implementation.} } @inproceedings{ubo:41111, author = {Budweg, Steffen and Lewkowicz, Myriam and Müller, Claudia and Schering, Sandra}, chapter = {}, title = {Fostering Social Interaction in AAL: Methodological reflections on the coupling of real household Living Lab und SmartHome approaches}, year = {2012}, volume = {11}, number = {3}, pages = {30–35}, abstract = {For user-centred design of ICT solutions in the AAL field, an approach combining real household living lab and SmartHome lab seems promising. Based on our experiences within the AAL project FoSIBLE, we propose a mixed-method approach to develop and evaluate a Social TV system from both a bird’s eye and worm’s-eye perspective in regards to user acceptance and rejection. We provide insights into the methodological strategies and analyse the strengths and weaknesses of our proposition to demonstrate how the different methodological approaches can augment each other in the different phases of AAL projects.}, issn = {1618-162X}, url = {http://dx.doi.org/10.1524/icom.2012.0035}, booktitle = {i-com : Zeitschrift für interaktive und kooperative Medien} } @inproceedings{ubo:37654, author = {Drobics, Mario and Budweg, Steffen and Schering, Sandra}, editor = {Association, A. A. L.}, chapter = {}, title = {Fostering Social Interaction with Smart TVs – Results from the FoSIBLE Project}, year = {2012}, address = {Brussels}, booktitle = {Proceedings of AAL Forum 2012 - Eindhoven} } @inproceedings{ubo:37653, author = {Müller, Claudia and Stein, Martin and Wan, Lin and Neufeldt, Cornelius and Wulf, Volker and Budweg, Steffen}, chapter = {}, title = {Nutzerorientierte Technikforschung und -entwicklung im Feld Ambient Assisted Living: Ergebnisse aus dem AAL-Projekt FoSIBLE}, year = {2012}, volume = {Suppl. 1}, issn = {0044-281X}, url = {http://www.springerlink.com/content/101583/}, booktitle = {Zeitschrift für Gerontologie und Geriatrie} } @inproceedings{ubo_mods_00120479, author = {Hussein, Tim and Lukosch, Stephan and Ziegler, Jürgen and Paulheim, Heiko and Calvary, Gaëlle}, title = {2nd International Workshop on Semantic Models for Adaptive Interactive Systems (SEMAIS 2011)}, booktitle = {IUI 2011: Proceedings of the ACM International Conference on Intelligent User Interfaces}, year = {2011}, publisher = {ACM Press}, address = {New York}, pages = {467–468}, keywords = {User interface design}, isbn = {978-1-4503-0419-1}, doi = {10.1145/1943403.1943504} } @inproceedings{ubo_mods_00120477, author = {Heim, Philipp and Ziegler, Jürgen}, editor = {Ebert, Achim}, title = {Faceted Visual Exploration of Semantic Data}, booktitle = {Human Aspects of Visualization: Revised Selected Papers}, series = {Lecture Notes in Computer Science}, year = {2011}, publisher = {Springer Berlin Heidelberg}, address = {Berlin [u.a.]}, volume = {6431}, pages = {58–75}, keywords = {SPARQL}, isbn = {978-3-642-19641-6}, issn = {1611-3349}, doi = {10.1007/978-3-642-19641-6} } @inproceedings{ubo_mods_00120309, author = {Díaz, Paloma and Hussein, Tim and Lohmann, Steffen and Ziegler, Jürgen}, title = {Data-Centric Interactions on the Web}, booktitle = {Human-Computer Interaction – INTERACT 2011: Proceedings, Part IV}, year = {2011}, publisher = {Springer Berlin Heidelberg}, address = {Berlin}, pages = {726–727}, keywords = {Web interaction}, isbn = {978-3-642-23767-6}, issn = {1611-3349}, doi = {10.1007/978-3-642-23768-3} } @inproceedings{ubo_mods_00119994, author = {Muenter, Daniel and Hussein, Tim}, editor = {Hussein, Tim and Lukosch, Stephan and Paulheim, Heiko and Ziegler, Jürgen}, title = {Adaptive presentation of itineraries in navigation systems by means of semantic models}, booktitle = {Proceedings of the 2nd Workshop on Semantic Models for Adaptive Interactive Systems}, series = {CEUR Workshop Proceedings}, year = {2011}, publisher = {RWTH}, address = {Aachen}, volume = {747}, keywords = {Navigation support}, issn = {1613-0073}, url = {http://duepublico.uni-duisburg-essen.de/servlets/DocumentServlet?id=24034} } @inproceedings{ubo_mods_00119943, author = {Ziegler, Jürgen}, editor = {Dittmar, Anke}, title = {Semantic web meets UI: Context-adaptive interaction with semantic data}, booktitle = {Proceedings of the 29th Annual European Conference on Cognitive Ergonomics}, year = {2011}, publisher = {ACM Press}, address = {Rostock}, pages = {15–16}, keywords = {visualization}, isbn = {978-1-4503-1029-1}, doi = {10.1145/2074712.2074716} } @incollection{ubo_mods_00036411, author = {Fricke-Ernst, Christiane and Kluge, Annette and Kötteritzsch, Anna}, title = {Comparison of controller attention decrease during different break patterns in night shifts.}, booktitle = {Proceedings of the 55th Annual Meeting of the Human Factors and Ergonomics Society (HFES); September 19-23, 2011, Las Vegas, Nevada}, year = {2011}, publisher = {HFES}, address = {Santa Monica}, pages = {1195–1199}, abstract = {Night shifts result in a high pressure on employees’ health. Regarding air traffic control, they may also represent a safety issue. Research showed that cognitive performance is decreased at night (Monk 1996) and safety risks increase starting from the second working hour without a break (Folkard et al. 2005). Investigating a request to extend the middle part of a night shift due to little traffic, different break patterns are compared in terms of avoiding health and safety issues. 189 air traffic controllers (ATCOs) from the Eurocontrol Maastricht Upper Area Control Centre in the Netherlands were tested during night shifts lasting for 7.5 hours. During the night shift, two teams, each consisting of two air traffic controllers, were working: While one team was on break, the other took over. They were assigned to three break patterns, with four or five hours of break or a split of the night shift. Each team was tested three times during normal operation. They estimated their subjective sleepiness using a subjective measure, the Stanford Sleepiness Scale, and filled in an objective measure, the d2, to measure attention. Furthermore, one measurement took place during a regular day shift in order to control the night shift data. Results show that five hours of working without a break does not have a negative impact on attention compared to the two other work-break patterns. External validity is given, since the study was conducted during normal operation. However, it was not possible to control and evaluate all confounding variables, as this would have disturbed the ongoing safe working processes of the scheduled shifts. Therefore, future research that examines individual differences in attention and considers the different activities during the breaks of the ATCOs still needs to be conducted in order to clearly identify an optimal break pattern for night shifts.}, isbn = {978-0-945289-39-5} } @book{ubo:46058, author = {Dudenhöffer, Ferdinand and Schramm, Dieter and Heinzel, Angelika and Schulz, Christof and Hirsch, Holger and Dudenhöffer, Kathrin and Hause, Leonie and Ziegler, Jürgen and Schreckenberg, Michael and Mietzel, Thorsten}, title = {Ingenieurwissenschaften: Herausforderung Elektromobilität}, series = {Unikate}, year = {2011}, publisher = {Universität Duisburg-Essen SSC}, note = {Signatur: E10/01 Z 262}, isbn = {3934359396}, url = {https://www.uni-due.de/unikate/archiv.php?eu=039} } @inproceedings{ubo:34483, author = {Gerling, Kathrin and Klauser, Matthias and Niesenhaus, Jörg}, chapter = {}, title = {Measuring the impact of game controllers on player experience in FPS games}, year = {2011}, publisher = {ACM}, address = {New York}, abstract = {An increasing amount of games is released on multiple platforms, and game designers face the challenge of integrating different interaction paradigms for console and PC users while keeping the core mechanics of a game. However, little research has addressed the influence of game controls on player experience. In this paper, we examine the impact of mouse and keyboard versus gamepad control in first-person shooters using the PC and PlayStation 3 versions of Battlefield: Bad Company 2. We conducted a study with 45 participants to compare player experience and game usability issues of participants who had previously played similar games on one of the respective gaming systems, while also exploring the effects of players being forced to switch to an unfamiliar platform. The results show that players switching to a new platform experience more usability issues and consider themselves more challenged, but report an equally positive overall experience as players on their comfort platform.}, isbn = {978-1-4503-0816-8}, url = {http://dx.doi.org/10.1145/2181037.2181052}, booktitle = {Proceedings of the 15th International Academic MindTrek Conference : Envisioning Future Media Environments (MindTrek ’11)} } @inproceedings{ubo:32508, author = {Stegemann, Timo and Hussein, Tim and Gaulke, Werner and Ziegler, Jürgen}, chapter = {}, title = {X3S: Eine Spezifikation zur Darstellung und interaktiven Exploration semantischer Daten}, year = {2011}, abstract = {Die zunehmenden Wandlung des Internets von einem dokumentenzentrierten hin zu einem datenorientierten Netz eröffnet für Nutzer wie Entwickler eine Fülle an Möglichkeiten. Allerdings stoßen traditionelle Ansätze des Web Engineerings bei der Fülle und Heterogenität der Daten häufig an ihre Grenzen. In diesem Beitrag wird mit X3S eine Spezifikation zur Filterung sowie zur Darstellung semantischer Inhalte des Daten-Webs vorgestellt, der das Anlegen und Wiederverwenden von Bausteinen zur Datenexploration und -visualisierung ermöglicht.}, url = {http://duepublico.uni-duisburg-essen.de/servlets/DocumentServlet?id=26874}, booktitle = {IVDW ’11: Interaktion und Visualisierung im Daten-Web} } @article{ubo:32815, author = {Fuchslocher, Alberto and Niesenhaus, Jörg and Krämer, Nicole}, title = {Serious games for health: An empirical study of the game “Balance” for teenagers with diabetes mellitus}, journal = {Entertainment Computing}, year = {2011}, volume = {2}, number = {2}, pages = {97–102}, abstract = {In addition to a broad range of different application areas, health games differ in the level of abstraction of the game’s message or goal and the way to achieve game benefits. Most games focus on teaching knowledge or prevention topics. Furthermore, some games focus on strengthening motivation of patients to attend a specific medication or to change their daily behavior in order to live healthier. In this paper we present the health game “Balance”, developed to optimize the self-management of teenagers with diabetes mellitus type-I. Two versions of the game were implemented: A version explicitly referring to diabetes and an implicit version of “Balance” with no diabetes content in order to reduce diabetes related reactance among juveniles. In a between-subjects experimental study with a clinical sample the two versions were compared. Results demonstrate, contrary to expectations, that the explicit game version yielded higher game enjoyment than the implicit version.}, url = {http://www.sciencedirect.com/science/article/pii/S1875952110000194} } @inproceedings{ubo:31878, author = {Richter, Alexander and Budweg, Steffen and Stocker, Alexander and Majcen, Kurt and Koch, Michael}, editor = {Eibl, Maximilian and Ritter, Marc}, chapter = {}, title = {Proceedings des Workshops "Senioren. Medien. Übermorgen."}, year = {2011}, publisher = {Universitätsverlag Chemnitz}, address = {Chemnitz}, url = {http://dl.mensch-und-computer.de/handle/123456789/1554}, booktitle = {Workshop-Proceedings der Tagung Mensch & Computer 2011. überMEDIEN|ÜBERmorgen} } @inproceedings{ubo:32814, author = {Niesenhaus, Jörg and Münter, Daniel and Hussein, Tim and Ziegler, Jürgen}, editor = {DiGRA}, chapter = {}, title = {Playful Crowdsourcing for Energy-Efficient Automotive Navigation}, year = {2011}, abstract = {In this paper, we describe the work-in-progress state of a playful simulation using crowdsourcing to gather data of efficient routes for automotive navigation in the context of electro mobility. Users will contribute well-known routes of their local area by playing the simulation. The routes will be evaluated with regard to height structure, traffic volume, and traffic signal frequency in the context of the daytime, season, and further time-dependent events. Based on this data, the simulation will be able to calculate the most energy-efficient route.}, url = {http://www.digra.org/dl/db/11312.40252.pdf}, booktitle = {Think Design Play. Proceedings of the 5th International Conference of the Digital Games Research Association (DiGRA)} } @inproceedings{ubo:31651, author = {Münter, Daniel and Hussein, Tim and Linder, Timm and Hofmann, Jens and Ziegler, Jürgen}, editor = {Eibl, Maximilian}, chapter = {}, title = {Nutzeradaptive Routenführung in Navigationssystemen}, year = {2011}, publisher = {Oldenbourg}, address = {München}, abstract = {In diesem Beitrag stellen wir die Ergebnisse zweier Studien zur adaptiven Generierung von Fahranweisungen unter Berücksichtigung der Ortskenntnisse vor. Es konnte gezeigt werden, dass angepasste Anweisungen durch die Nutzer präferiert werden. Ein entwickelter Generator für personalisierte Anweisungen wurde zudem signifikant besser bewertet als ein etablierter Onlinedienst (Google Maps).}, isbn = {978-3-486-71235-3}, url = {http://www.oldenbourg-verlag.de/wissenschaftsverlag/mensch-computer-2011/9783486712353}, booktitle = {Mensch & Computer 2011} } @inproceedings{ubo:31825, author = {Klauser, Matthias and Schulte, P. Frank and Niesenhaus, Jörg and Grundmann, Manuel and Ziegler, Jürgen}, editor = {Eibl, Maximilian}, chapter = {}, title = {Merobrixx – Mental Rotation Bricks: A serious game for cognitive training}, year = {2011}, publisher = {Oldenbourg Verlag}, address = {München}, abstract = {In this paper we introduce the prototype of a cognitive training environment called “Merobrixx”. Merobrixx is a serious game for players of all ages, including children and elderly people, based on traditional mental rotation training methods. Players interact with the game by means of a Tangible User Interface (TUI), which consists of three-dimensional objects made of LEGO bricks. A first evaluation of the system confirms that the user’s performance in the game is positively related to his or her general mental rotation ability. Based on these findings further research regarding the conditions for a long term training effect is planned.}, isbn = {978-3-486-71235-3}, url = {http://dl.mensch-und-computer.de/handle/123456789/1548}, booktitle = {Mensch & Computer 2011, 11. fachübergreifende Konferenz für interaktive und kooperative Medien. überMEDIEN – ÜBERmorgen} } @article{ubo:32816, author = {Nacke, Lennart and Stellmach, Sophie and Sasse, Dennis and Niesenhaus, Jörg and Dachselt, Raimund}, title = {LAIF: A Logging and Interaction Framework for Gaze-Based Interfaces in Virtual Entertainment Environments}, journal = {Entertainment Computing}, year = {2011}, volume = {2}, number = {4}, pages = {265–273}, abstract = {Eye tracking is starting to be used for evaluation and interaction in virtual environments. Especially digital games can benefit from an integrated approach, using eye tracking technology for analysis and interaction. One benefit is faster development of gaze interaction games, which can be automatically evaluated in iterative development cycles. For this purpose, we present a framework of programming libraries that enables rapid game development and gameplay analysis within an experimental research environment. The framework presented here is extensible for different kinds of logging (e.g., psychophysiological and in-game behavioral data) and facilitates studies using eye-tracking technology in digital entertainment environments. An experimental study using gaze-only interaction in a digital game is presented and highlights the framework’s capacity to create games and evaluate novel entertainment interfaces. \textcopyright 2010 International Federation for Information Processing.}, url = {http://www.sciencedirect.com/science/article/pii/S1875952110000091} } @inproceedings{ubo:32506, author = {Stegemann, Timo and Hussein, Tim and Gaulke, Werner and Ziegler, Jürgen}, editor = {Diaz, Paloma and Hussein, Tim and Lohmann, Steffen and Ziegler, Jürgen}, chapter = {}, title = {Interacting with semantic data by using X3S}, year = {2011}, url = {http://duepublico.uni-duisburg-essen.de/servlets/DocumentServlet?id=26869}, booktitle = {Proceedings of the 1st Workshop on Data-Centric Interactions on the Web} } @inproceedings{ubo:32507, author = {Ziegler, Jürgen and Hussein, Tim and Münter, Daniel and Hofmann, Jens and Linder, Timm}, chapter = {}, title = {Generating Route Instructions with Varying Levels of Detail}, year = {2011}, abstract = {In this paper, we present a technique for adaptive generation of personalized route instructions based on the driver’s knowledge of particular route sections. We evaluated the mechanism with two empirical studies, both attesting significant preference for the adaptively generated presentations over an established online service (Google Maps).}, url = {http://duepublico.uni-duisburg-essen.de/servlets/DocumentServlet?id=26873}, booktitle = {3rd International Conference on Automotive User Interfaces and Interactive Vehicular Applications (AutomotiveUI 2011)} } @article{ubo:32123, author = {Drobics, Mario and Zima, Matthias and Hrg, Dalibor and Bobeth, Jan and Budweg, Steffen}, title = {FoSIBLE: Design of an Integrated Environment for Social Interaction}, journal = {ERCIM News}, year = {2011}, volume = {87}, pages = {33–34}, issn = {0926-4981} } @inproceedings{ubo:31877, author = {Kötteritzsch, Anna and Budweg, Steffen and Klauser, Matthias}, editor = {Eibl, Maximilian and Ritter, Marc}, chapter = {}, title = {Förderung sozialer Interaktion durch Activity Communities für Senioren}, year = {2011}, publisher = {Universitätsverlag Chemnitz}, address = {Chemnitz}, abstract = {Das Altern in der eigenen Wohnumgebung kann für viele Senioren einen Anstieg an Lebensqualität bedeuten. Beim individuellen Wohnen bleiben die Einbindung in soziale Kontakte und Interaktionen sowie körperliche Bewegung und Aktivitäten wichtige Faktoren, die gefördert werden sollten. In einer Activity Community soll das Erleben sozialer Interaktion innerhalb einer Social TV Plattform durch den Einsatz von Daten aus Fitness- und Bewegungsspielen angereichert werden. Senioren sollen die Möglichkeit haben, Ziele in kleinen Gruppen gemeinsam zu setzen und durch unterschiedliche Aktivitäten zu erreichen. In diesem Beitrag werden Grenzen bisheriger Systeme zur Unterstützung von sozialer Interaktion und Aktivita?t diskutiert und das Konzept der Activity Community vorgestellt.}, url = {http://dl.mensch-und-computer.de/handle/123456789/1605}, booktitle = {Workshop-Proceedings der Tagung Mensch & Computer 2011. überMEDIEN|ÜBERmorgen} } @inproceedings{ubo:31827, author = {Masuch, Maic and Rauterberg, Matthias and Niesenhaus, Jörg}, editor = {Eibl, Maximilian}, chapter = {}, title = {Entertainment Interfaces Track: Preface}, year = {2011}, publisher = {Oldenbourg Verlag}, address = {München}, isbn = {978-3-486-71235-3}, url = {http://dl.mensch-und-computer.de/handle/123456789/1545}, booktitle = {Mensch & Computer 2011: überMEDIEN|ÜBERmorgen} } @article{ubo:30161, author = {Budweg, Steffen and Schaffers, Hans and Ruland, Rudolf and Kristensen, Kjetil and Prinz, Wolfgang}, title = {Enhancing collaboration in communities of professionals using a Living Lab approach}, journal = {Production Planning & Control}, year = {2011}, volume = {22}, number = {5/6}, pages = {594 –609}, abstract = {The Living Lab approach within the multi-year integrated project ECOSPACE focused on community building and active user involvement in the process of developing, introducing and evaluating new collaboration concepts and tools. This paper reports about implementing and evaluating our adapted Living Labs framework to facilitate innovation in collaborative work environments to enhance professional communities. The pursued implementation approach is considered as a strategy for innovation, change and adoption. We use a perspective of socio-technical systems to explain the change-catalyzing role of our framework and findings.}, issn = {0953-7287}, url = {http://www.informaworld.com/smpp/content content=a936144670 db=all} } @inproceedings{ubo:27519, author = {Niesenhaus, Jörg}, editor = {von Hagen, Cornelia and Schwarz, Peter}, chapter = {}, title = {Einsatz von Serious Games zur Förderung des Selbstmanagements}, year = {2011}, edition = {1. Auflage}, publisher = {Kohlhammer}, address = {Stuttgart}, abstract = {Im Zuge der immer stärker wachsenden Bedeutung von Gesundheit in einer sich demographisch stark verändernden Gesellschaft ist es essenziell gesundheitsförderliche Verhaltensformen in allen Altersgruppen zu motivieren und zu unterstützen. Geeignet gestaltete und unterhaltungsorientierte Informationssysteme wie Serious Games bieten ein erhebliches Potenzial, solche Verhaltensänderungen gerade – aber nicht nur – bei jungen Zielgruppen zu fördern.}, isbn = {978-3-17-020840-7}, booktitle = {Selbstmanagement bei chronischen Erkrankungen im Kindes- und Jugendalter} } @article{ubo:28968, author = {Hussein, Tim and Ziegler, Jürgen}, title = {Situationsgerechtes Recommending – Kontextadaptive, hybride Empfehlungsgenerierung}, journal = {Informatik Spektrum}, year = {2011}, volume = {34}, number = {2}, pages = {143–152}, abstract = {Dieser Artikel untersucht die unterschiedlichen Paradigmen, die kontextadaptiven Empfehlungssystemen zugrunde liegen und schlägt einen neuen perspektivenorientierten Ansatz vor. Kontext kann demnach nicht nur als vorab festgelegte Menge vorliegender Gegebenheiten (repräsentationaler Ansatz) oder in Wechselwirkung zur aktuellen Tätigkeit (interaktionaler Ansatz) gesehen werden, sondern als eine sich dynamisch ändernde Perspektive, unter der eine vorliegende Situation zu beurteilen ist. Mit Context Views führen wir eine Methode ein, mit der auf diese Weise kontextsensitive Empfehlungen generiert werden können. Weiterhin wird ein Framework vorgestellt, das in flexibler Weise kontextabhängig unterschiedliche Strategien zur Empfehlungsgenerierung in einem hybriden Ansatz integrieren kann.}, url = {http://www.springerlink.com/content/g63v543125526334/} } @article{ubo:29666, author = {Ziegler, Jürgen and Münter, Daniel and Hussein, Tim}, title = {Elektromobilität braucht intelligente Navigation}, journal = {UNIKATE - Herausforderung Elektromobilität}, year = {2011}, volume = {39}, pages = {S. 62 –71}, abstract = {In-car navigation systems are increasingly evolving into powerful mobility assistants which, in addition to conventional functions such as routing and providing directions, can offer the driver manifold information resources and services. Through this, they will also become an important supportive technology for making mobility with electric vehicles more effective and acceptable. More intelligent methods of trip planning and routing will be required for e-cars due to the current constraints concerning charging time and availability of charging stations. Moreover, by flexibly integrating different information resources and services available on the Internet, trips can be better aligned with the driver’s tasks and needs, opening up opportunities for new business models for service providers and merchants. Primary methods for integrating heterogeneous services in a smart mobility assistant are provided by Semantic Web technologies and standards. This article discusses the different requirements for a mobility assistant, describes the underlying technologies, and presents a prototypical system that was developed in the colognE-mobil project.}, issn = {1869-3881}, url = {http://www.uni-due.de/unikate/archiv.php?eu=039} } @article{ubo:29668, author = {Münter, Daniel and Hussein, Tim}, title = {Adaptive Routenbeschreibungen für Navigationssysteme}, journal = {i-com – Zeitschrift für interaktive und kooperative Medien}, year = {2011}, volume = {10}, number = {1}, pages = {11 –17}, abstract = {In diesem Beitrag stellen wir ein Verfahren zur adaptiven Präsentation für Navigationsgeräte vor, welche auf semantischen Modellen basiert. Dabei reichern wir herkömmliche Routenbeschreibungen mit semantischen Informationen an und präsentieren dem Fahrer lediglich diejenigen Routenanweisungen, an denen er wirklich interessiert ist und blenden überflüssige Anweisungen aus.}, url = {http://duepublico.uni-duisburg-essen.de/servlets/DocumentServlet?id=25471} } @inproceedings{ubo:28374, author = {Münter, Daniel and Hussein, Tim}, chapter = {}, title = {Adaptive presentation of itineraries in navigation systems by means of semantic models}, year = {2011}, abstract = {In this paper, we introduce a technique for adaptive presentation of itineraries in navigation systems based on semantic models. We enrich waypoints with semantic information and display only those waypoints to the driver that he is really interested in, hiding information that will most probably be distracting.}, url = {http://duepublico.uni-duisburg-essen.de/servlets/DocumentServlet?id=24034}, booktitle = {SEMAIS ’11: Proceedings of the 2nd workshop on Semantic Models for Adaptive Interactive Systems (in conjunction with IUI 2011)} } @inproceedings{ubo_mods_00126119, author = {Ziegler, Jürgen and Haake, M. Jörg and Lukosch, Stephan and Pipek, Volkmar}, title = {Context-adaptive interaction for collaborative work}, booktitle = {CHI 2010 - we are HCI: Conference Proceedings and Extended Abstracts}, year = {2010}, publisher = {Association for Computing Machinery (ACM)}, address = {New York}, pages = {4461–4464}, keywords = {Cooperation support}, isbn = {978-1-60558-931-2}, doi = {10.1145/1753846.1754174} } @inproceedings{ubo_mods_00123396, author = {Joop, Björn and Ziegler, Jürgen}, title = {Group context-based adaptations for recommendation}, booktitle = {Proceedings of the 1st international workshop on Semantic models for adaptive interactive systems}, year = {2010}, publisher = {ACM Press}, address = {New York}, pages = {11–15}, keywords = {user context}, isbn = {978-1-4503-0000-1}, doi = {10.1145/2002375.2002378} } @inproceedings{ubo_mods_00123334, author = {Hussein, Tim and Lukosch, G. Stephan and Ziegler, Jürgen and Dix, Alan}, title = {1st international workshop on semantic models for adaptive interactive systems (SEMAIS 2010)}, booktitle = {Proceedings of the 15th international conference on Intelligent user interfaces}, year = {2010}, publisher = {ACM Press}, address = {New York}, pages = {437–438}, keywords = {Usability}, isbn = {978-1-60558-515-4}, doi = {10.1145/1719970.1720061} } @inproceedings{ubo_mods_00123321, author = {Heim, Philipp and Ertl, Thomas and Ziegler, Jürgen}, title = {Facet Graphs: Complex Semantic Querying Made Easy}, booktitle = {The Semantic Web: Research and Applications; Proccedings Part I}, year = {2010}, publisher = {Springer Berlin Heidelberg}, address = {Berlin}, pages = {288–302}, keywords = {SPARQL}, isbn = {978-3-642-13485-2}, issn = {0302-9743}, doi = {10.1007/978-3-642-13486-9_20} } @article{ubo_mods_00120700, author = {Haake, M. Joerg and Hussein, Tim and Joop, Björn and Lukosch, Stephan and Veiel, Dirk and Ziegler, Jürgen}, title = {Modeling and exploiting context for adaptive collaboration}, journal = {International Journal of Cooperative Information Systems}, year = {2010}, volume = {19}, number = {1-2}, pages = {71–120}, keywords = {CSCW}, issn = {1793-6365}, doi = {10.1142/S0218843010002115} } @phdthesis{ubo_mods_00025185, abstract = {In diesem Buch wird eine interaktive Vorgehensweise für den Vergleich und die Integration von Ontologien vorgestellt, die automatische Ontologie-Analyseverfahren mit interaktiven Visualisierungstechniken verbindet und nahtlos Aktivitäten zur Exploration, zum Vergleich und zur Integration von komplexen Ontologien unterstützt. Der Schwerpunkt der Arbeit liegt auf der expliziten Kontrolle des Merging-Prozesses durch den Nutzer, der Bereitstellung von Kontextinformationen zur Entscheidungsunterstützung bei der Integration und auf einer inkrementellen Vorgehensweise, um die Revidierbarkeit von Schritten mit unerwünschten Konsequenzen zu unterstützen. Der vorgestellte Ontologie-Editor iMerge erlaubt nicht nur die Erzeugung aussagekräftiger visueller Darstellungen, sondern ermöglicht auch ein hohes Maß an Interaktion. Die Analyse-Funktionalität wird nutzergesteuert ausgeführt und die Analyseergebnisse werden kontextabhängig und grafisch repräsentiert, so dass zu jedem Zeitpunkt nachvollzogen werden kann, was im Rahmen des Vergleichs- und Integrationsprozesses passiert. Dies bezieht sich sowohl auf die Steuerung der visuellen Repräsentation der Ontologie als auch auf die Interaktion mit den Ergebnissen des Vergleichsprozesses. Die in dieser Arbeit vorgestellte interaktive Vorgehensweise erlaubt dem Nutzer eine Schritt-für- Schritt Integration zweier Ontologien, so dass er nachvollziehen kann, welche Konzepte aus welchen Gründen zusammengeführt werden. Bei diesem Vorgehen wird der Nutzer während des gesamten Prozesses visuell unterstützt.}, address = {Lohmar [u.a.]}, author = {El Jerroudi, Zoulfa}, date-added = {2018-05-02 07:13:23 +0000}, date-modified = {2018-05-02 09:44:11 +0000}, edition = {1. Aufl.}, isbn = {978-3-89936-916-8}, note = {Zugl.: Duisburg, Essen, Univ., Diss., 2009}, publisher = {Eul}, school = {University of Duisburg-Essen}, series = {Schriften zu Kooperations- und Mediensystemen; 25}, title = {Eine interaktive Vorgehensweise für den Vergleich und die Integration von Ontologien}, year = {2010} } @inproceedings{ubo:60527, author = {Heim, Philipp and Lohmann, Steffen and Stegemann, Timo}, chapter = {}, title = {Interactive Relationship Discovery via the Semantic Web}, series = {Lecture Notes in Computer Science}, year = {2010}, publisher = {Springer-Verlag Berlin Heidelberg}, address = {Berlin [u.a.]}, volume = {6088}, pages = {303–317}, isbn = {978-3-642-13485-2}, doi = {10.1007/978-3-642-13486-9_21}, booktitle = {The Semantic Web: Research and Applications: 7th Extended Semantic Web Conference, ESWC 2010, Heraklion, Crete, Greece, May 30 –June 3, 2010, Proceedings, Part I} } @book{ubo:27372, author = {Prinz, Wolfgang and Budweg, Steffen}, title = {White paper on Web 2.0 & Enterprise cooperation services based on Web 2.0 principles}, year = {2010}, publisher = {COIN Project Collaboration and Interoperability for Networked Enterprises} } @inproceedings{ubo:26021, author = {Lohmann, Steffen and Heim, Philipp and Stegemann, Timo and Ziegler, Jürgen}, chapter = {}, title = {The RelFinder User Interface: Interactive Exploration of Relationships between Objects of Interest}, year = {2010}, publisher = {ACM}, address = {New York, NY}, abstract = {Being aware of the relationships that exist between objects of interest is crucial in many situations. The RelFinder user interface helps to get an overview: Even large amounts of relationships can be visualized, filtered, and analyzed by the user. Common concepts of knowledge representation are exploited in order to support interactive exploration both on the level of global filters and single relationships. The RelFinder is easy-to-use and works on every RDF knowledge base that provides standardized SPARQL access.}, isbn = {978-1-60558-515-4}, booktitle = {Proceedings of the 14th International Conference on Intelligent User Interfaces (IUI 2010)} } @inproceedings{ubo:27630, author = {Gerling, Kathrin and Klauser, Matthias and Masuch, Maic}, editor = {Niesenhaus, Jörg and Rauterberg, Matthias and Masuch, Maic}, chapter = {}, title = {Serious Interface Design for Dental Health: WiiMote-based Tangible Interaction for School Children}, year = {2010}, publisher = {CEUR Workshop Proceedings ; 634}, abstract = {This paper describes a camera-based approach towards creating a tangible interface for serious games. We introduce our game for dental health targeted at school children which implements the Nintendo WiiMote as infrared camera. Paired with a gesture-recognition system, this combination allows us to apply real-world items as input devices. Thereby, the game tries to address different aspects of dental hygiene along with the improvement of children’s motor skills. In our focus group test, we found that tangible interfaces offer great potential for educational purposes and can be used to engage kids in a playful learning process by addressing their childlike curiosity and fostering implicit learning.}, url = {http://ceur-ws.org/Vol-634/Entertainment-Interfaces-Proceedings02.pdf}, booktitle = {EI 2010 : Proceedings of the Entertainment Interfaces Track 2010 at Interaktive Kulturen 2010} } @book{ubo:26426, editor = {Niesenhaus, Jörg and Rauterberg, Matthias and Masuch, Maic}, title = {Proceedings of the Entertainment Interfaces Track 2010 at Interaktive Kulturen 2010}, year = {2010}, publisher = {CEUR Workshop Proceedings}, abstract = {For the first time the track “Entertainment Interfaces” took take place together with the German HCI conference Mensch & Computer, the German e-learning conference DeLFI and the German Usability Professionals (UPA) track from 12-15 September at Duisburg. Within the past years the market of entertainment products has seen an overwhelming growth and has become an important part of the creative industries. This steady growth is not only based upon the changing demographics of users of interactive entertainment. One important reason is the diversification of interactive entertainment products converting more and more casual users into active consumers. The motion-sensitive controllers of the Nintendo Wii game console, the music instruments of Guitar Hero and Rock Band, and also products like Microsoft’s Natal which are currently in development offer innovative and user-friendly interfaces to attract new target groups. Computer- and videogames are not the only area the diversification changes: In the course of the growing media convergence new entertainment products evolve between the different fields of the creative industries. Interactive audio books, innovative toys and building blocks, game-based learning and serious games, virtual and augmented realities, and artistic installations and products give a first idea of the potential of this area. The track “Entertainment Interfaces” offers researchers, developers and designers a platform to present innovative ideas in the area of interactive entertainment with a focus on interaction in games and other entertainment products and to discuss design challenges and the evaluation of entertainment interfaces. The aims of the track are to strengthen the awareness of the relevance of user-friendly and innovative interfaces for entertainment applications in the research community and in the public, to encourage the research activities and the education in this field, and to foster the knowledge transfer between researchers and developers. We like to emphasize the interdisciplinary background of the “Entertainment Interfaces” track and welcome contributions from the areas of computer science, psychology, design and engineering sciences as well as contributions from developers and designers working in the field of interactive entertainment.}, note = {ISSN 1613-0073}, url = {http://ceur-ws.org/Vol-634} } @book{ubo:27380, editor = {Budweg, Steffen and Draxler, Sebastian and Lohmann, Steffen and Rashid, Asarnusch and Stevens, Gunnar}, title = {Proceedings of the 2nd International Workshop on Open Design Spaces (ODS 2010)}, series = {International reports on socio-informatics}, year = {2010}, publisher = {Internationales Institut für Sozio-Informatik}, address = {Bonn} } @inproceedings{ubo:26352, author = {Vervenne, Marcel and Niesenhaus, Jörg}, editor = {Kerres, Michael and Ojstersek, Nadine and Schroeder, Ulrik and Hoppe, Ulrich Heinz}, chapter = {}, title = {Kompetenzentwicklung und Wissensmanagement durch situiertes Lernen in Massive Multiplayer Online Games}, year = {2010}, publisher = {Köllen Druck + Verlag}, address = {Bonn}, abstract = {Dieser Beitrag thematisiert die Kompetenzentwicklung und das Wissensmanagement durch situiertes Lernen am Beispiel des Massively Multiplayer Online-Rollenspiels World of Warcraft (WoW). Auf der Basis der Darstellung der Komplexität des Spiels werden mehrere Wissensbereiche definiert. Darüber hinaus werden Untersuchungsergebnisse präsentiert, welche Aufschluss über die Demographie, das Nutzungsverhalten, und das Lernen in komplexen Welten geben sollen.}, isbn = {978-3-88579-263-5}, booktitle = {Proceedings der DeLFI 2010 - 8. Tagung der Fachgruppe E-Learning der Gesellschaft für Informatik e.V.} } @inproceedings{ubo:26213, author = {Joop, Björn and Ziegler, Jürgen}, chapter = {}, title = {Group context-based adaptations for recommendation}, year = {2010}, address = {Hong Kong, China}, abstract = {In groupware or community based applications the user interface is usually static or tailored to the individual user’s needs. Newer developments try to adapt the user interface automatically in regard to user contexts. Even though these techniques are proven useful, there exists no contextadaptive system taking the current context of a group or community in regard. In this paper, we briefly discuss the problems of defining context and present our understanding of context as a subset of the current information state. We provide an exemplary scenario to present different approaches how to compute group contexts based on semantic models and user contexts, and the consequences for the adaptation goals - in the interface or through changes at system functionalities or tools. We additionally discuss the problems occurring at evaluating adaptations and the value of group context for collaborative work.}, url = {http://duepublico.uni-duisburg-essen.de/servlets/DocumentServlet?id=22545}, booktitle = {Semantic Models for Adaptive Interactive Systems (SEMAIS), 1st Workshop in conjunction with the International Conference on Intelligent User Interfaces (IUI) 2010.} } @inproceedings{ubo:26020, author = {Lohmann, Steffen and Tomanek, Katrin and Ziegler, Jürgen and Hahn, Udo}, editor = {Ohlsson, Stellan and Catrambone, Richard}, chapter = {}, title = {Getting at the Cognitive Complexity of Linguistic Metadata Annotation: A Pilot Study Using Eye-Tracking}, year = {2010}, publisher = {Cognitive Science Society}, address = {Austin, TX}, abstract = {We report on an experiment where the decision behavior of annotators issuing linguistic metadata is observed with an eye-tracking device. As experimental conditions we consider the role of textual context and linguistic complexity classes. Still preliminary in nature, our data suggests that semantic complexity is much harder to deal with than syntactic one, and that full-scale textual context is negligible for annotation, with the exception of semantic high-complexity cases. We claim that such observational data might lay the foundation for empirically grounded annotation cost models and the design of cognitively adequate annotation user interfaces.}, url = {http://palm.mindmodeling.org/cogsci2010/papers/0508/paper0508.pdf}, booktitle = {Proceedings of the 32nd Annual Meeting of the Cognitive Science Society (CogSci 2010)} } @inproceedings{ubo:26371, author = {Nacke, E. Lennart and Schild, Jonas and Niesenhaus, Jörg}, editor = {Calvi, Licia and Gualeni, Stefano and Nuijten, Koos and Nacke, E. Lennart and Poels, Karolien}, chapter = {}, title = {Gameplay experience testing with playability and usability surveys – An experimental pilot study}, year = {2010}, publisher = {NHTV Expertise Series}, address = {Breda}, url = {http://www.acagamic.com/uploads/2007/09/Playability-submission.final_.submission.pdf}, abstract = {This pilot study investigates an experimental methodology for gathering data to create correlations between experiential factors measured by a gameplay experience questionnaire and player quality measures, such as playing frequency, choice of game, and playing time. The characteristics of two distinct games were examined concerning the aspects of game experience, subjective game quality, and game usability. Interactions within the three aspects were identified. The results suggest that gameplay experience dimensions flow and immersion are similarly motivating in different game genres, which however might not be equally enjoyable. On the one hand, usability ratings may be positively influenced when a game provides immersion and flow or on the other hand, flow and immersion may be negatively influenced by poor usability ratings. These results emphasize the need for an approach to classify games based on correlation patterns involving game experience, quality, and usability.}, booktitle = {Playability and player experience: Proceedings of the Fun and Games 2010 Workshop} } @inproceedings{ubo:25078, author = {Heim, Philipp and Ertl, Thomas and Ziegler, Jürgen}, chapter = {}, title = {Facet Graphs: Complex semantic querying made easy}, year = {2010}, publisher = {Springer}, address = {Berlin}, booktitle = {Proceedings ESWC 2010 - 7th Extended Semantic Web Conference} } @inproceedings{ubo:26427, author = {Nacke, E. Lennart and Niesenhaus, Jörg and Engl, Stephan and Canossa, Alessandro and Kuikkaniemi, Kai and Immich, Thomas}, editor = {Niesenhaus, Jörg and Rauterberg, Matthias and Masuch, Maic}, chapter = {}, title = {Bringing Digital Games to User Research and User Experience}, year = {2010}, edition = {Vol-634}, publisher = {CEUR Workshop Proceedings}, abstract = {In recent years, the gaming industry has grown up and digital games have become more complex products. With this maturity comes an increasing need for formal playtesting methods from user research and scientific methods from academia. Employing user research methods in game development, especially combined qualitative (e.g., questionnaires, interviews) and quantitative (e.g., EEG, EMG, game metrics) methods lead to a better understanding of the relationship and interactions between players and games. This panel gathers game user research industry and academic experts for discussing current methodological advancements and future challenges in playtesting, usability, playability evaluation, and general game user research.}, url = {http://ceur-ws.org/Vol-634}, booktitle = {Proceedings of the Entertainment Interfaces Track 2010 at Interaktive Kulturen 2010} } @inproceedings{ubo:26214, author = {Joop, Björn and Ziegler, Jürgen}, editor = {Baloian, Nelson and Luther, Wolfram and Söffker, Dirk and Urano, Yoshiyori}, chapter = {}, title = {A framework for context-based adaptation (for collaboration)}, year = {2010}, address = {Berlin: Logos}, url = {http://duepublico.uni-duisburg-essen.de/servlets/DocumentServlet?id=22547}, abstract = {The topic of our talk focuses on definitions of context and approaches in computer science to model context in adaptive or context-aware systems. We present briefly an own context-understanding, a multi-layered framework for context-based adaptation. We present some current examples for context-based adaptation and conclude with some further thoughts about adding unstructured information such as tags to our context understanding to be able to mediate knowledge between different contexts and users.}, booktitle = {Interfaces and Interaction Design for Learning and Simulation Environments} } @inproceedings{ubo:26019, author = {Tomanek, Katrin and Hahn, Udo and Lohmann, Steffen and Ziegler, Jürgen}, editor = {Linguistics, Association for Computational}, chapter = {}, title = {A Cognitive Cost Model of Annotations Based on Eye-Tracking Data}, year = {2010}, publisher = {ACL}, address = {Uppsala}, abstract = {We report on an experiment where the decision behavior of annotators issuing linguistic metadata is observed with an eyetracking device. As experimental conditions we consider the role of textual context and linguistic complexity classes. Still preliminary in nature, our data suggests that semantic complexity is much harder to deal with than syntactic one, and that full-scale textual context is negligible for annotation, with the exception of semantic high-complexity cases. We claim that such observational data might lay the foundation for empirically grounded annotation cost models and the design of cognitively adequate annotation user interfaces.}, isbn = {978-1-932432-66-4}, url = {http://www.aclweb.org/anthology-new/P/P10/P10-1118.pdf}, booktitle = {Proceedings of the 48th Annual Meeting of the Association for Computational Linguistics (ACL 2010)} } @inproceedings{ubo:27688, author = {Hussein, Tim and Gaulke, Werner and Hartmann, Anabell and Ziegler, Jürgen}, editor = {Ziegler, Jürgen and Schmidt, Albrecht}, chapter = {}, title = {Wahrnehmung und Akzeptanz von systemgenerierten Produktempfehlungen}, year = {2010}, edition = {1}, publisher = {Oldenbourg}, address = {München}, abstract = {Seit mehr als einem Jahrzehnt werden Empfehlungssysteme (Recommender Systems) in Webshops, Nachrichtenportalen und anderen Bereichen eingesetzt, um die Nutzer zielgerichtet zu potenziell interessanten Produkten und Inhalten zu führen. Während seit vielen Jahren intensiv an der Verbesserung der Algorithmen zur Empfehlungsgenerierung geforscht wird, ist jedoch wenig darüber bekannt, welche Faktoren – neben der Qualität der Empfehlungen an sich – für die Wahrnehmung und Akzeptanz systemgenerierter Empfehlungen verantwortlich sind. Dieser Beitrag präsentiert die Ergebnisse einer Studie, in der der Einfluss von Faktoren wie Kenntnis der durchsuchten Produktdomäne, Preisniveau der Produkte und Zeitdruck untersucht werden. Die Ergebnisse der Studie zeigen, dass Kenntnis der Produktdomäne sowie der Preisbereich der Produkte Einfluss auf die oben angesprochenen Größen hatten. Zeitdruck hingegen erwies sich nicht als relevanter Faktor.}, isbn = {978-3-486-70408-2}, booktitle = {Mensch & Computer 2010} } @incollection{ubo_mods_00027852, author = {Hussein, Tim and Münter, Daniel and Gaulke, Werner}, editor = {Hussein, Tim and Haake, Jörg and Lukosch, Stephan and Pipek, Volkmar}, title = {Use-Cases zur Validierung generischer Adaptiver Ansätze}, booktitle = {EASYS ’10: Proceedings des ersten Workshops zur Evaluation Adaptiver Systeme}, year = {2010}, address = {Duisburg}, pages = {1–8}, url = {http://duepublico.uni-duisburg-essen.de/servlets/DocumentServlet?id=23732}, abstract = {Es gibt eine Vielzahl an adaptiven Systemen, Frameworks oder Modellen, die den Anspruch aufstellen, generisch Anwendbar zu sein. Ist eine Evaluation oder Validierung derartiger Systeme ohnehin schon anspruchsvoll, so ist der Nachweis der generellen Anwendbarkeit eine noch größere Herausforderung. In diesem Artikel werden vier Use-Cases vorgestellt, mit denen derartige Ansätze auf ihre allgemeine Anwendbarkeit hin untersucht werden können. Ist es möglich, alle vier Szenarien mit dem Ansatz abzubilden bzw. umzusetzen, so kann der Anspruch auf allgemeine Anwendbarkeit aufrecht erhalten werden.} } @article{ubo:27686, author = {Haake, Jörg and Hussein, Tim and Joop, Björn and Lukosch, Stephan and Veiel, Dirk and Ziegler, Jürgen}, title = {Modeling and exploiting context for adaptive collaboration}, journal = {International Journal of Cooperative Information Systems (IJCIS)}, year = {2010}, volume = {19}, number = {1-2}, pages = {71–120}, abstract = {Collaborative work is characterized by frequently changing situations and corresponding demands for tool support and interaction behavior provided by the collaboration environment. Current approaches to address these changing demands include manual tailoring by end-users and automatic adaptation of single user tools or for individual users. Few systems use context as a basis for adapting collaborative work environments, mostly focusing on document recommendation and awareness provision. In this paper, we present, firstly, a generic four layer framework for modeling and exploiting context. Secondly, a generic adaptation process translating user activity into state, deriving context for a given focus, and executing adaptation rules on this context. Thirdly, a collaboration domain model for describing collaboration environments and collaborative situations. Fourthly, examples of exploiting our approach to support context-based adaptation in four typical collaboration situations: co-location, co-access, co-recommendation, and co-dependency.}, issn = {1793-6365}, url = {http://www.worldscinet.com/ijcis/19/1901n02/S0218843010002115.html} } @inproceedings{ubo:26372, author = {Münter, Daniel and Hussein, Tim and Gaulke, Werner}, editor = {Schroeder, Ulrik}, chapter = {}, title = {Kontextabhängige Empfehlung von Services zur intelligenten Navigationsunterstützung}, year = {2010}, edition = {1. Auflage}, publisher = {Logos Verlag}, address = {Berlin}, abstract = {In diesem Beitrag stellen wir ein neuartiges Konzept zur Integration von Diensten zur intelligenten Navigationsunterstützung vor. Unser Ansatz berücksichtigt Kontextinformationen (wie beispielsweise der aktuelle Ort oder die gefahrene Route) ebenso wie Daten, welche über web-basierte Dienstleistungsangebote (z.B. Hotelbewertungen oder Benzinpreise) ermittelt werden können. Wir präsentieren ein generisches Framework, welches zur Entwicklung von Navigationssystemen verwendet werden kann, die solche Dienste einbinden.}, isbn = {978-3-8325-2578-1}, url = {http://www.logos-verlag.de/cgi-bin/engbuchmid?isbn=2578&lng=deu&id=0}, booktitle = {Interaktive Kulturen - Proceedings der Workshops der Mensch & Computer 2010 - 10. fachübergreifende Konferenz für interaktive und kooperative Medien, DeLFI 2010 - Die 8. E-Learning Fachtagung Informatik der Gesellschaft für Informatik e.V. und der Entertainment Interfaces 2010} } @incollection{ubo_mods_00024885, author = {Hussein, Tim and Gaulke, Werner and Linder, Timm and Ziegler, Jürgen}, title = {Improving collaboration by using context views}, booktitle = {Context-Adaptive Interaction for Collaborative Work (CAICOLL), 1st Workshop in conjunction with the ACM Conference on Human Factors in Computing Systems (CHI) 2010}, year = {2010}, address = {Atlanta, GA, USA}, pages = {1–6}, url = {http://duepublico.uni-duisburg-essen.de/servlets/DocumentServlet?id=22051}, abstract = {In this paper, we explain our notion of context, considering for instance membership in a group as context. We derive a model for context-adaptivity from the well-established one for user-adaptivity proposed by Jameson, and introduce context views as means for facilitating group-based work. Context views aim at identifying the most important elements within an application in a generic way by exploiting context information.} } @article{ubo:27690, author = {Hussein, Tim and Gaulke, Werner}, title = {Hybride, kontext-sensitive Generierung von Produktempfehlungen}, journal = {i-com – Zeitschrift für interaktive und kooperative Medien}, year = {2010}, volume = {9}, number = {2}, pages = {16–23}, abstract = {In diesem Beitrag stellen wir mit Hybreed RecFlows ein modulares Framework zur Generierung von (Produkt) Empfehlungen vor. RecFlows (Kurzform für Recommendation Workflows) stellt eine Reihe etablierter Algorithmen aus dem Bereich Recommender Systems zur Verfügung sowie einen Workflow-Mechanismus, um aus diesen Algorithmen flexibel hybride Recommender zu erstellen. Darüber hinaus werden unterschiedliche Sensoren bereitgestellt, um Informationen aus verschiedenen Quellen in den Empfehlungsprozess mit einfließen zu lassen. Insbesondere werden Sensoren zur Kontext-Erfassung (z. B. der aktuelle Ort des Nutzers anhand seiner IP-Adresse) implementiert. So ist es möglich, mit Hilfe von RecFlows hybride, kontextsensitive Empfehlungen zu generieren. Read More: http://www.oldenbourg-link.com/doi/abs/10.1524/icom.2010.0018}, url = {http://www.oldenbourg-link.com/doi/abs/10.1524/icom.2010.0018} } @inproceedings{ubo:24883, author = {Hussein, Tim and Neuhaus, Sebastian}, chapter = {}, title = {Explanation of spreading activation based recommendations}, year = {2010}, address = {Hong Kong, China}, url = {http://duepublico.uni-duisburg-essen.de/servlets/DocumentServlet?id=21925}, abstract = {In this paper, we introduce an approach for explaining rec- ommendations in environments that are based on semantic models. Using a constrained Spreading Activation (CSA) technique for recommendation generation, we store and exploit the activation paths leading to recommendations. These paths later can be used to generate both verbal explanations and relevance feedback forms.}, booktitle = {Semantic Models for Adaptive Interactive Systems (SEMAIS), 1st Workshop in conjunction with the International Conference on Intelligent User Interfaces (IUI) 2010} } @inproceedings{ubo:24768, author = {Hussein, Tim}, editor = {Baloian, Nelson and Luther, Wolfram and Söffker, Dirk and Urano, Yoshiyori}, chapter = {}, title = {Context-aware Recommendations}, year = {2010}, publisher = {Logos}, address = {Berlin}, abstract = {This article illustrates the vivid research field of hybrid and context-aware recommender systems. Moreover, two own approaches to deal with context-awareness in recommender systems, are described in detail.}, isbn = {978-3-8325-2361-9}, url = {http://duepublico.uni-duisburg-essen.de/servlets/DocumentServlet?id=21924}, booktitle = {Interfaces and Interaction Design for Learning and Simulation Environments} } @inproceedings{ubo:24767, author = {Hussein, Tim and Münter, Daniel}, chapter = {}, title = {Automated Generation of a Faceted Navigation Interface Using Semantic Models}, year = {2010}, address = {Hong Kong, China}, abstract = {In this paper, we introduce a concept for automated generation of faceted navigation widgets. These widgets are generated on the fly depending on the type of data to be displayed. For this purpose, we use semantic models for data representation and apply generic SPARQL queries, which makes the navigation creation completely independent from the content and structure of the underlying models.}, url = {http://duepublico.uni-duisburg-essen.de/servlets/DocumentServlet?id=21923}, booktitle = {Semantic Models for Adaptive Interactive Systems (SEMAIS), 1st Workshop in conjunction with the International Conference on Intelligent User Interfaces (IUI) 2010} } @inproceedings{ubo:27689, author = {Hussein, Tim and Linder, Timm and Gaulke, Werner and Ziegler, Jürgen}, editor = {Kolfschoten, Gwendolyn and Herrmann, Thomas and Lukosch, Stephan}, chapter = {}, title = {A framework and an architecture for context-aware group recommendations}, year = {2010}, publisher = {Springer}, address = {Berlin}, abstract = {In this paper, we propose a generic framework to generate context-aware recommendations for both single users as well as groups. We present the the concept of context views and an corresponding architecture implementing the framework as well as exemplary recommendation workflows for group recommendations.}, isbn = {978-3-642-15714-1}, url = {http://www.springerlink.com/content/et680874862602w6/}, booktitle = {Collaboration and Technology: 16th International Conference, CRIWG 2010, Maastricht, The Netherlands, September 20-23, 2010. Proceedings} } @inproceedings{ubo:27395, author = {Budweg, Steffen and Draxler, Sebastian and Lohmann, Steffen and Rashid, Asarnusch and Stevens, Gunnar}, chapter = {}, title = {Open design spaces: socially crafting interactive experiences}, year = {2010}, abstract = {Engaging end-users and user communities to take an active part in the co-creation, evolution, and appropriation of modern, interactive systems has become an increasingly important issue over the last years. Bringing together existing research and experiences as well as new challenges such as long-term, large-scale, or highly distributed stakeholders has led to the notion of Open Design Spaces (ODS) to frame and reflect current developments of distributed codesign. Several, formerly often separated strands of research covering different aspects of these challenges have emerged and led to a growing community of researchers and practitioners building on concepts such as Participatory Design, Meta-Design, and End-User Development. Building on two successful predecessors on the topic with more than 50 international researchers and practitioners, the workshop at DIS 2010 focuses particularly on social aspects and community co-creation in Open Design Spaces.}, url = {http://doi.acm.org/10.1145/1858171.1858261}, booktitle = {DIS ’10: Proceedings of the 8th ACM Conference on Designing Interactive Systems} } @book{ubo:35943, author = {Haake, Jörg and Hussein, Tim and Joop, Björn and Lukosch, Stephan and Veiel, Dirk and Ziegler, Jürgen}, title = {Context Modeling for Adaptive Collaboration}, series = {Technischer Bericht}, year = {2009}, publisher = {Abteilung für Informatik und Angewandte Kognitionswissenschaft, Fakultät für Ingenieurwissenschaften, Universität Duisburg-Essen}, address = {Essen}, url = {http://duepublico.uni-duisburg-essen.de/servlets/DocumentServlet?id=20510}, abstract = {Collaborative work is characterized by frequently changing situations and corresponding demands for tool support and interaction behavior provided by the collaboration environment. Current approaches to address these changing demands include manual tailoring by end-users and automatic adaptation of single user tools or for individual users. Few systems use context as a basis for adapting collaborative work environments, mostly focusing on document recommendation and awareness provision. In this paper we present, firstly, a generic four layer framework for modeling context in a collaboration environment, secondly, a generic adaptation process translating user activity into state, deriving context for a given focus, and executing adaptation rules on this context, thirdly, a collaboration domain model for describing collaboration environments and collaborative situations, and, fourthly, examples of exploiting our approach to support context-based adaptation in four typical collaboration situations: co-location, co-access, co-recommendation, and co-dependency.} } @incollection{ubo_mods_00022244, author = {Lohmann, Steffen and Dietzold, Sebastian and Heim, Philipp and Heino, Norman}, editor = {Münch, Jürgen and Liggesmeyer, Peter}, title = {A Web Platform for Social Requirements Engineering}, booktitle = {Software Engineering 2009 - Workshopband}, year = {2009}, publisher = {Köllen}, address = {Bonn}, pages = {309–315}, abstract = {This paper presents a web platform that applies concepts from the domain of Social Software to requirements engineering. The platform implements several community-oriented features that support collaboration and knowledge sharing and aim to foster the engagement of larger groups of stakeholders in the collection, discussion, development, and structuring of software requirements.}, isbn = {9783885792444} } @inproceedings{ubo:23081, author = {Lohmann, Steffen}, editor = {Breitner, H. Michael and Lehner, Franz and Staff, Jörg and Wienand, Udo}, chapter = {}, title = {Social Tagging im E-Learning}, year = {2009}, publisher = {Physica/Springer}, address = {Heidelberg}, isbn = {978-3-7908-2354-7}, booktitle = {E-Learning 2010: Aspekte der Betriebswirtschaftslehre und Informatik} } @inproceedings{ubo:22920, author = {Heim, Philipp and Lohmann, Steffen}, editor = {Tochtermann, Klaus and Maurer, Hermann}, chapter = {}, title = {ChainGraph: A New Approach to Visualize Shared Properties in Resource Collections}, year = {2009}, publisher = {J.UCS}, address = {Graz}, url = {http://i-know.tugraz.at/2009/papers/chaingraph_visualize_shared_properties.pdf}, booktitle = {Proceedings of the 9th International Conference on Knowledge Management and Knowledge Technologies (I-KNOW 09)} } @book{ubo:22923, editor = {Auer, Sören and Lauenroth, Kim and Lohmann, Steffen and Riechert, Thomas}, title = {Agiles Requirements Engineering für Softwareprojekte mit einer großen Anzahl verteilter Stakeholder}, series = {Leipziger Beiträge zur Informatik}, year = {2009}, address = {Leipzig}, isbn = {978-3-941608-05-4} } @inbook{ubo:22924, author = {Riechert, Thomas and Lohmann, Steffen}, editor = {Auer, Sören and Lauenroth, Kim and Lohmann, Steffen and Riechert, Thomas}, chapter = {Die SoftWiki-Ontologie: Grundlage für semantische Interoperabilität im Requirements Engineering}, title = {Agiles Requirements Engineering: für Softwareprojekte mit einer großen Anzahl verteilter Stakeholder}, year = {2009}, address = {Leipzig}, isbn = {978-3-941608-05-4} } @inproceedings{ubo:23495, author = {Heim, Philipp and Hellmann, Sebastian and Lehmann, Jens and Lohmann, Steffen and Stegemann, Timo}, editor = {Chua, Tat-Seng and Kompatsiaris, Yiannis and Mérialdo, Bernard and Haas, Werner and Thallinger, Georg and Bailer, Werner}, chapter = {}, title = {RelFinder: Revealing Relationships in RDF Knowledge Bases}, year = {2009}, publisher = {Springer}, address = {Berlin/Heidelberg}, isbn = {978-3-642-10542-5}, url = {http://www.uni-due.de/ s400268/RelFinder-SAMT09.pdf}, booktitle = {Semantic Multimedia - Proceedings of the 4th International Conference on Semantic and Digital Media Technologies} } @inproceedings{ubo:22061, author = {Lohmann, Steffen and Schielke, Kathrin and Niesenhaus, Jörg}, editor = {Fähnrich, Klaus-Peter and Schumacher, Frank}, chapter = {}, title = {Untersuchung des Einflusses rationaler und emotionaler Faktoren bei der Entscheidungsfindung in virtuellen Spielwelten}, year = {2009}, address = {Leipzig}, abstract = {Nicht nur Entscheidungen in der Realwelt, sondern auch Entscheidungen in virtuellen Spielwelten sind von einer Vielzahl von Faktoren abhängig. In diesem Beitrag wird eine Nutzerstudie vorgestellt, die den Einfluss rationaler und emotionaler Faktoren bei der Wahl von Spielfigur und Ausrüstungsgegenständen für ein Online-Rollenspiel untersucht. Die Ergebnisse der Studie deuten darauf hin, dass die optische Präsentation und eine klangvolle Namensgebung den Einfluss emotionaler Faktoren bei der Entscheidungsfindung verstärken. Über eine Blickbewegungsanalyse werden die Ergebnisse bewertet und zusätzliche Erkenntnisse abgeleitet}, isbn = {9783941608009}, booktitle = {Digitale Spiele in Forschung und Lehre: Beiträge zum Games Summer Camp 2008} } @incollection{ubo_mods_00022922, author = {Heim, Philipp and Stegemann, Timo and Lohmann, Steffen and Ziegler, Jürgen}, editor = {Wandke, Hartmut and Kain, Saskia and Struve, Doreen}, title = {Semantisch unterstützte Informationsextraktion aus Dokumentenmengen}, booktitle = {Mensch & Computer 2009}, year = {2009}, publisher = {Oldenbourg}, address = {München}, pages = {415–418}, isbn = {978-3-486-59222-1} } @inproceedings{ubo:22888, author = {Niesenhaus, Jörg}, editor = {Krämer, Nicole and Sobieraj, Sabrina and von der Pütten, Astrid}, chapter = {}, title = {Perception of System- and Human-driven Character Behaviour in Digital Games}, year = {2009}, publisher = {Pabst Science Publishers}, address = {Lengerich}, abstract = {Current digital games use different technologies and methods to bring virtual characters to life. The study focuses on the question how different body movements and non-verbal expressions of the virtual characters are perceived by gamers and by non-gamers.}, isbn = {978-3-89967-581-8}, booktitle = {Media Psychology - Focus Theme: New Media and Interactive Systems. Proceedings of the 6th Conference of the Media Psychology Division of the German Psychological Society} } @book{ubo_mods_00022062, editor = {Budweg, Steffen and Draxler, Sebastian and Lohmann, Steffen and Rashid, Asarnusch and Stevens, Gunnar}, title = {Open Design Spaces Supporting User Innovation: Proceedings of the International Workshop on Open Design Spaces (ODS’09)}, series = {IRSI}, year = {2009}, address = {Bonn}, url = {http://www.iisi.de/fileadmin/IISI/upload/IRSI/IRSIV6I2.pdf} } @inproceedings{ubo:22403, author = {Niesenhaus, Jörg and Bode, Stephan}, editor = {Fähnrich, Klaus-Peter and Schumacher, Frank}, chapter = {}, title = {Messung der Nutzungseffizienz bei Game-Interfaces unter Berücksichtigung von Blickbewegungen}, year = {2009}, publisher = {Leipziger Beiträge zur Informatik}, address = {Leipzig}, abstract = {Das Ziel der im Usability-Labor des Lehrstuhls durchgeführten Untersuchung war die Prüfung unterschiedlicher Interface-Versionen einer Spieleserie auf ihre Nutzungseffizienz unter Berücksichtigung von Blickbewegungen. Als Stimuli wurden zwei unterschiedliche Spiele aus der Echtzeitstrategiespielserie ?Dune“ ausgewählt. Im Vordergrund der Untersuchung stand vor allem die Frage nach der Rolle der Gestaltung eines Interfaces im Prozess der Aufgabenlösung und welchen Einfluss sie auf die Leichtigkeit, Schnelligkeit und Effizienz der Lösung der Aufgaben hat.}, isbn = {978-3-941608-00-9}, booktitle = {Digitale Spiele in Forschung und Lehre - Beiträge zum Games Summer Camp 2008} } @inproceedings{ubo:22485, author = {Niesenhaus, Jörg and Lohmann, Steffen}, editor = {Pellegrini, Tassilo and Auer, Sören and Tochtermann, Klaus and Schaffert, Sebastian}, chapter = {}, title = {Marrying Game Development with Knowledge Management: Challenges and Potentials}, year = {2009}, publisher = {Springer}, address = {Berlin, Heidelberg}, abstract = {The game industry has long been neglected as a market and research area for knowledge management and semantic technologies. However, as the budgets for game projects are growing and game development is subject to an increasing professionalization and specialization coupled with outsourcing and offshoring, new needs and potentials for continuous knowledge management and the use of semantic technologies emerge. This chapter starts with a description of the current situation and examines typical game development activities and involved parties that could benefit from a continuous knowledge management support. Subsequently, it provides a general framework architecture and implementation examples that show how knowledge management and semantic technologies can be employed to support game development.}, isbn = {978-3-642-02183-1}, booktitle = {Networked Knowledge - Networked Media: Integrating Knowledge Management, New Media Technologies and Semantic Systems} } @inproceedings{ubo:22925, author = {Heim, Philipp and Stegemann, Timo and Lohmann, Steffen and Ziegler, Jürgen and Cyriaks, Haiko and Stolz, Horst}, editor = {Auer, Sören and Lauenroth, Kim and Lohmann, Steffen and Riechert, Thomas}, chapter = {}, title = {InteractiveExtractor: Durchgängige Unterstützung bei der Extraktion von anforderungsrelevanten Informationen}, year = {2009}, address = {Leipzig}, isbn = {978-3-941608-05-4}, booktitle = {Agiles Requirements Engineering: für Softwareprojekte mit einer großen Anzahl verteilter Stakeholder} } @inproceedings{ubo:22926, author = {Lohmann, Steffen and Ziegler, Jürgen}, editor = {Auer, Sören and Lauenroth, Kim and Lohmann, Steffen and Riechert, Thomas}, chapter = {}, title = {Integrierte und kontextualisierte Erfassung von Nutzeranforderungen}, year = {2009}, address = {Leipzig}, isbn = {978-3-941608-05-4}, booktitle = {Agiles Requirements Engineering: für Softwareprojekte mit einer großen Anzahl verteilter Stakeholder} } @article{ubo:22761, author = {Lohmann, Steffen and Niesenhaus, Jörg and Heim, Philipp and Ziegler, Jürgen}, title = {Fostering Knowledge Flow and Community Engagement in the Development of Interactive Entertainment}, journal = {Journal of Universal Computer Science}, year = {2009}, volume = {15}, number = {8}, pages = {1722–1734}, abstract = {Due to an increasing professionalization, specialization, and globalization in the development of interactive entertainment new demands for comprehensive knowledge management support emerge. This article aims at sensitizing and systematizing the needs and potentials for continuous knowledge flow and community engagement in this application area. It starts with an analysis of typical development activities and involved parties that could benefit from a continuous knowledge management support. Then, a general framework architecture and implementation examples are presented that provide different levels of knowledge management support for interactive entertainment development.}, issn = {0948-695X}, url = {http://www.jucs.org/jucs_15_8/fostering_knowledge_flow_and/jucs_15_08_1722_1734_lohmann.pdf} } @inproceedings{ubo:22889, author = {Niesenhaus, Jörg and Löschner, Johannes and Kahraman, Burak}, editor = {Kain, Saskia and Struve, Doreen and Wandke, Hartmut}, chapter = {}, title = {Förderung der Nutzerinnovation im Rahmen digitaler Spiele durch intuitive Werkzeuge am Beispiel des Game Prototyping Frameworks}, year = {2009}, publisher = {Logos Verlag}, address = {Berlin}, abstract = {Der Artikel beschreibt die Entwicklung der Nutzerpartizipation in der Spieleindustrie und geht auf einige Faktoren ein, die den Erfolg dieses Bereichs begünstigten. Im Anschluss wird die besondere Rolle der Entwicklungswerkzeuge für die Nutzerinnovation und –partizipation erläutert und eine systematische Gliederung existierender Werkzeuge vorgestellt. Den Abschluss des Artikels bildet ein kurzer Ausblick auf das derzeit in Entwicklung befindliche ?Game Prototyping Framework“, welches mit Hilfe intuitiver Werkzeuge und Methoden die Umsetzung eigener Spielideen unterstützen soll.}, isbn = {978-3-8325-2181-3}, booktitle = {Grenzenlos frei!? Workshop-Proceedings der Tagung Mensch & Computer 2009} } @inproceedings{ubo:23494, author = {Lohmann, Steffen and Heim, Philipp and Tetzlaff, Lena and Ertl, Thomas and Ziegler, Jürgen}, editor = {Chua, Tat-Seng and Kompatsiaris, Yiannis and Mérialdo, Bernard and Haas, Werner and Thallinger, Georg and Bailer, Werner}, chapter = {}, title = {Exploring Relationships between Annotated Images with the ChainGraph Visualization}, year = {2009}, publisher = {Springer}, address = {Berlin/Heidelberg}, abstract = {Understanding relationships and commonalities between digital contents based on metadata is a difficult user task that requires sophisticated presentation forms. In this paper, we describe an advanced graph visualization that supports users with these activities. It reduces several problems of common graph visualizations and provides a specific chain arrangement of nodes that facilitates visual tracking of relationships. We present a concrete implementation for the exploration of relationships between images based on shared tags. An evaluation with a comparative user study shows good performance results on several dimensions. We therefore conclude that the ChainGraph approach can be considered a serious alternative to common graph visualizations in situations where relationships and commonalities between contents are of interest. After a discussion of the limitations, we finally point to some application scenarios and future enhancements.}, isbn = {978-3-642-10542-5}, url = {http://www.uni-due.de/ s400268/ImageChainGraph-SAMT09.pdf}, booktitle = {Semantic Multimedia - Proceedings of the 4th International Conference on Semantic and Digital Media Technologies} } @article{ubo:23929, author = {Lohmann, Steffen and Heim, Philipp and Stegemann, Timo and Tetzlaff, Lena and Ziegler, Jürgen}, title = {Entdecken und Explorieren von Zusammenhängen im Semantic Web}, journal = {i-com - Zeitschrift für interaktive und kooperative Medien}, year = {2009}, volume = {8}, number = {3}, pages = {33–39}, issn = {1618-162X} } @inproceedings{ubo:22921, author = {Lohmann, Steffen and Ziegler, Jürgen and Tetzlaff, Lena}, editor = {Wandke, Hartmut and Kain, Saskia and Struve, Doreen}, chapter = {}, title = {Ein Blick in die Wolken: Visuelle Exploration von Tag Clouds}, year = {2009}, publisher = {Oldenbourg}, address = {München}, isbn = {978-3-486-59222-1}, booktitle = {Mensch & Computer 2009} } @inproceedings{ubo:22500, author = {Lohmann, Steffen and Ziegler, Jürgen and Tetzlaff, Lena}, editor = {Gross, Tom and Gulliksen, Jan and Kotzé, Paula and Oestreicher, Lars and Palanque, Philippe and Prates, Oliveira Raquel and Winkler, Marco}, chapter = {}, title = {Comparison of Tag Cloud Layouts: Task-Related Performance and Visual Exploration}, year = {2009}, publisher = {Springer}, address = {Berlin, Heidelberg}, abstract = {Tag clouds have become a popular visualization and navigation interface on the Web. Despite their popularity, little is known about tag cloud perception and performance with respect to different user goals. This paper presents results from a comparative study of several tag cloud layouts. The results show differences in task performance, leading to the conclusion that interface designers should carefully select the appropriate tag cloud layout according to the expected user goals. Furthermore, the analysis of eye tracking data provides insights into the visual exploration strategies of tag cloud users.}, isbn = {978-3-642-03654-5}, url = {http://www.uni-due.de/ s400268/Lohmann09-interact.pdf}, booktitle = {Human-Computer Interaction - INTERACT 2009} } @inproceedings{ubo:27401, author = {Schaffers, Hans and Budweg, Steffen and Ruland, Rudolf and Kristensen, Kjetil}, editor = {Camarinha-Matos, M. Luis and Afsarmanesh, Hamideh and Paraskakis, Iraklis}, chapter = {}, title = {Collaborative environments to support professional communities: a living lab approach}, year = {2009}, publisher = {Springer-Verlag}, address = {Berlin}, isbn = {978-3-642-04567-7}, url = {http://publica.fraunhofer.de/eprints/urn:nbn:de:0011-n-1101547.pdf}, booktitle = {Leveraging knowledge for innovation in collaborative networks: 10th IFIP WG 5.5 Working Conference on Virtual Enterprises} } @article{ubo:22487, author = {Niesenhaus, Jörg}, title = {Challenges and Potentials of User Involvement in the Process of Creating Games}, journal = {International Reports on Socio-Informatics: Open Design Spaces Supporting User Innovation}, year = {2009}, volume = {2/2009}, number = {volume 6}, pages = {56–68}, abstract = {This article gives a short overview about the history of user involvement in the area of digital games and describes the speci?c challenges and potentials of the participation and motivation of users in this application area. It speci?es the different degrees and types of user involvement and outlines the current state of the art. Moreover, the article discusses the implications of user involvement for game companies and users with a special regard to user-generated content and gives an outlook on future development.} } @inproceedings{ubo:23454, author = {Joop, Björn and Hussein, Tim and Ziegler, Jürgen}, chapter = {}, title = {Nutzung individueller Kontextinformationen zur Verbesserung von kollaborativen Arbeiten}, year = {2009}, address = {Berlin}, abstract = {Kollaborative Arbeitsprozesse werden entweder durch spezialisierte Arbeitsumgebungen gezielt unterstützt oder sind individualisierbar. Kontextbasierte Kollaborationsumgebungen können sich kontextabhängig auf die jeweilige Arbeitssituationen einstellen und so dynamisch auf Änderungen der Prozesse oder der Benutzer reagieren. In diesem Beitrag stellen wir ein Kontext-Modell vor, welches sowohl individuelle Nutzerkontexte, wie auch gemeinsamen Kontext multipler Benutzer, erfassen, repräsentieren und als Basis für Adaptionseffekte nutzen kann.}, url = {http://duepublico.uni-duisburg-essen.de/servlets/DocumentServlet?id=21069}, booktitle = {Open Design Spaces 2009} } @inproceedings{ubo:22981, author = {Hussein, Tim and Linder, Timm and Gaulke, Werner and Ziegler, Jürgen}, editor = {Bergmann, Lawrence}, chapter = {}, title = {Context-aware Recommendations on Rails}, year = {2009}, address = {New York, NY, USA}, url = {http://duepublico.uni-duisburg-essen.de/servlets/DocumentServlet?id=20980}, booktitle = {Proceedings of the 2009 Workshop on Context-aware Recommender Systems (CARS 2009)} } @inproceedings{ubo:27399, author = {Jeners, Nils and Budweg, Steffen and Prinz, Wolfgang}, chapter = {}, title = {Portal modules for groupware systems}, year = {2009}, abstract = {Groupware Systems become more and more functional and complex. Often many features are integrated in a monolithic interface that should fit all needs. A new trend towards portal systems can provide flexible and user-adaptable environments. This paper therefore presents a new approach for the modularization of collaborative systems. We present the requirements analysis, the concept and implementation as well as experiences from a pilot of portal modules that were added to an existing Groupware system.}, booktitle = {5th International Conference on Collaborative Computing: Networking, Applications and Worksharing / CD-ROM.} } @inproceedings{ubo:27400, author = {Schaffers, Hans and Budweg, Steffen and Kristensen, Kjetil and Ruland, Rudolf}, chapter = {}, title = {A living lab approach for enhancing collaboration in professional communities}, year = {2009}, abstract = {The ECOSPACE Integrated Project has developed an advanced collaborative workspace platform for eProfessionals. The technologies, services and collaboration tools have been developed, integrated and validated in various living labs addressing different contexts of eProfessional working. This paper reports about the Living Lab for Professional Communities of Innovation and covers three different user environments where innovative tools, services and practices have been experimented in different experimental settings. The first setting addresses the support of new work and collaboration practices in professional education. The second setting focuses on collaboration among business and research partners in promoting regional innovation. The third setting is about collaborative innovation in virtual communities. In the three settings, different user communities have adopted and experimented different sets of collaboration services. The paper presents the living lab methodology designed to launch, operate and monitor the different innovation and validation settings. Based on a cross-comparison of results and a longitudinal analysis, conclusions are drawn regarding the effectiveness of innovation services and collaborative platform, strategies to involve users and building user communities, and the effectiveness of the living labs methodology.}, url = {http://www.ict-21.ch/com-ict/IMG/pdf/74_Schaffers_Ecospace_paper.pdf}, booktitle = {ICE 2009} } @inproceedings{ubo:27396, author = {Budweg, Steffen and Draxler, Sebastian and Lohmann, Steffen and Rashid, Asarnusch and Stevens, Gunnar}, chapter = {}, title = {Open design spaces supporting user innovation: perspectives and challenges}, year = {2009}, booktitle = {Open design spaces supporting user innovation} } @inproceedings{ubo:27397, author = {Budweg, Steffen and Draxler, Sebastian and Lohmann, Steffen and Rashid, Asarnusch and Stevens, Gunnar}, chapter = {}, title = {Open Design Spaces (ODS) : Innovation durch Nutzerbeteiligung.}, year = {2009}, abstract = {Mit steigendem Anspruch an Innovation und Flexibilität von Unternehmen stellt die Innovationskraft von Anwendern einen oft unterschätzten Wettbewerbsvorteil dar. Dass sich die Beteiligung von Anwendern bei der Entwicklung von Softwaresystemen und zugehörigen Service-Angeboten positiv auswirken kann, zeigen Studien des Participatory Designs sowie die Erfolge des Web 2.0. In der Wirtschaft stoßen Ansätze wie Enter-prise 2.0, Living Labs, Crowdsourcing, Perpetual Beta und das Open-Innovation-Paradigma zunehmend auf Interesse, da die Grenzen traditioneller Formen der Systementwicklung erkannt und die Chancen weitaus höher als die Risiken zu sein scheinen. Um diesen aktuellen Entwicklungen besser Ausdruck zu verleihen, haben wir das Leitbild der Open Design Spaces (ODS) entwickelt. Open Design Spaces lassen sich durch die Metapher eines für jedermann zugänglichen Gestaltungs- und Handlungsraumes beschreiben, der Möglichkeiten zum kontinuierlichen Austausch mit dem Anwender bereitstellt und ihn als Co-Designer sowie festen Bestandteil der Systementwicklung versteht.}, booktitle = {Workshop-Proceedings der Tagung Mensch & Computer 2009: Grenzenlos frei?!} } @inproceedings{ubo:27398, author = {Budweg, Steffen and Kristensen, Kjetil}, chapter = {}, title = {Co-Creation in Distributed ICT Living Labs.}, year = {2009}, booktitle = {Proceedings of the INTERACT 2009 Workshop Towards a manifesto of Living Lab co-creation} } @inproceedings{ubo:24670, author = {Nacke, E. Lennart and Drachen, Anders and Kuikkaniemi, Kai and Niesenhaus, Jörg and Korhohnen, J. Hannu and Hoogen, den Wouter van and Ijsselsteijn, Wijnand and Kort, de Yvonne}, editor = {DiGRA}, chapter = {}, title = {Playability and Player Experience Research}, year = {2009}, address = {London, UK}, abstract = {As the game industry matures and games become more and more complex, there is an increasing need to develop scientific methodologies for analyzing and measuring player experience, in order to develop a better understanding of the relationship and interactions between players and games. This panel gathers distinguished European playability and user experience experts to discuss current findings and methodological advancements within player experience and playability research.}, url = {http://www.bth.se/fou/forskinfo.nsf/17e96a0dab8ab6a1c1257457004d59ab/e0a8cdd8cfc0c7e6c125762c005557c0/$file/Nacke-etal-Panel%20Playability%20and%20Player%20Experience.pdf}, booktitle = {Proceedings of DiGRA 2009: Breaking New Ground: Innovation in Games, Play, Practice and Theory.} } @inproceedings{ubo_mods_00160890, author = {Lohmann, Steffen and Ziegler, Jürgen and Heim, Philipp}, editor = {Forbrig, Peter and Paternò, Fabio}, title = {Involving end users in distributed requirements engineering}, booktitle = {Engineering Interactive Systems: Proceedings}, series = {Lecture Notes in Computer Science}, year = {2008}, publisher = {Springer}, address = {Berlin}, volume = {5247}, pages = {221–228}, keywords = {Web-based participation}, isbn = {978-3-540-85992-5}, doi = {10.1007/978-3-540-85992-5_20} } @inproceedings{ubo:19285, author = {Lohmann, Steffen and Heim, Philipp and Lauenroth, Kim}, chapter = {}, title = {Web-based Stakeholder Participation in Distributed Requirements Elicitation}, year = {2008}, publisher = {IEEE}, address = {Los Alamitos, CA, USA}, isbn = {978-0-7695-3309-4}, booktitle = {Proceedings of the 16th IEEE International Requirements Engineering Conference (RE ’08)} } @inproceedings{ubo:19283, author = {Lohmann, Steffen and Heim, Philipp and Auer, Sören and Dietzold, Sebastian and Riechert, Thomas}, editor = {Auer, Sören and Schaffert, Sebastian and Pellegrini, Tassilo}, chapter = {}, title = {Semantifying Requirements Engineering - The SoftWiki Approach}, year = {2008}, publisher = {J.UCS}, address = {Graz}, booktitle = {Proceedings of the 4th International Conference on Semantic Technologies (I-SEMANTICS ’08)} } @inproceedings{ubo:19294, author = {Lohmann, Steffen and Thalmann, Stefan and Harrer, Andreas and Maier, Ronald}, editor = {Tochtermann, Klaus and Maurer, Hermann}, chapter = {}, title = {Learner-Driven Annotation of Learning Resources – Lessons from Experiments on Tagging}, year = {2008}, publisher = {J.UCS}, address = {Graz}, booktitle = {Proceedings of the 8th International Conference on Knowledge Management (I-KNOW 08)} } @inbook{ubo:19307, author = {Harrer, Andreas and Lohmann, Steffen}, editor = {Gaiser, Birgit and Hampel, Thorsten and Panke, Stefanie}, chapter = {Möglichkeiten des Tagging als partizipative Methode für Lehrportale und E-Learning-Kurse}, title = {Good Tags – Bad Tags: Social Tagging in der Wissensorganisation}, year = {2008}, publisher = {Waxmann}, address = {Münster}, abstract = {Als dynamische und einfache Form der Auszeichnung von Ressourcen kann sich Tagging im E-Learning positiv auf Partizipation, soziale Navigation und das Verständnis der Lernenden auswirken. Dieser Beitrag beleuchtet verschiedene Möglichkeiten des Einsatzes von Social Tagging in Lehrportalen und E-Learning-Kursen. Hierzu werden zunächst drei konkrete Anwendungsfälle dargestellt. Anschließend werden aus den Anwendungsfällen gewonnene Erkenntnisse für Lehr-/Lernszenarien zusammengefasst.}, isbn = {978-3-8309-2039-7} } @inproceedings{ubo:19691, author = {Lohmann, Steffen and Rashid, Asarnusch}, editor = {Abrahão, Silvia and Law, Effie and Stage, Jan and Hornbæk, Kasper and Juristo, Natalia}, chapter = {}, title = {Fostering Remote User Participation and Integration of User Feedback into Software Development}, year = {2008}, publisher = {CEUR-WS}, address = {Aachen}, url = {http://sunsite.informatik.rwth-aachen.de/Publications/CEUR-WS/Vol-407/paper14.pdf}, booktitle = {Proceedings of the First Workshop on the Interplay between Usability Evaluation and Software Development} } @incollection{ubo_mods_00019293, author = {Lohmann, Steffen and Ziegler, Jürgen}, editor = {Herczeg, Michael and Kindsmüller, Christoph}, title = {Webbasierte Erfassung und Analyse von Nutzeranforderungen}, booktitle = {Mensch und Computer 2008}, year = {2008}, publisher = {Oldenbourg}, address = {München}, pages = {419–422}, abstract = {Dieser Beitrag beschreibt die Anwendungen Softfox und SW-Analytics, die eine webbasierte Erfassung von Nutzeranforderungen und deren strukturierte Analyse ermöglichen. Ziel ist es, Endanwendern eine Möglichkeit zu geben, jederzeit und von jedem Standort aus Anforderungen auf Basis einer vorhandenen Webanwendung zu äußern.}, isbn = {978-3-486-58900-9}, url = {http://mc.informatik.uni-hamburg.de/konferenzbaende/mc2008/konferenzband/mc2008_47_lohmann.pdf} } @inproceedings{ubo:19291, author = {Lohmann, Steffen and Niesenhaus, Jörg}, editor = {Tochtermann, Klaus and Maurer, Hermann}, chapter = {}, title = {Towards Continuous Integration of Knowledge Management into Game Development}, year = {2008}, publisher = {J.UCS}, address = {Graz}, booktitle = {Proceedings of the 8th International Conference on Knowledge Management (I-KNOW 08)} } @inproceedings{ubo:22402, author = {Bormann, Mark and Heyligers, Katharina and Kerres, Michael and Niesenhaus, Jörg}, editor = {Lucke, Ulrich and Kindsmüller, Christof Martin and Fischer, Stefan and Herczeg, Michael and Seehusen, Silke}, chapter = {}, title = {Spielend Lernen! Spielend Lernen? Eine empirische Annäherung an die Möglichkeiten einer Synthese von Spielen und Lernen}, year = {2008}, publisher = {Logos Verlag}, address = {Berlin}, abstract = {Der Artikel beschreibt die Chancen und Herausforderungen der Synthese von Spielen und Lernen und stellt verschiedene Positionen zu den möglichen Lernpotentialen, aber auch der Unvereinbarkeit von Spielen und Lernen gegenüber. Anhand erster Studien mit Game-Based Learning Anwendungen werden die Herausforderungen dieses Anwendungsbereichs verdeutlicht.}, isbn = {978-3-8325-2007-6}, booktitle = {Workshop Proceedings der Tagungen Mensch & Computer 2008, DeLFI 2008 und Cognitive Design 2008} } @book{ubo:19693, editor = {Auer, Sören and Dietzold, Sebastian and Lohmann, Steffen and Ziegler, Jürgen}, title = {Proceedings of the International Workshop on Interacting with Multimedia Content in the Social Semantic Web (IMC-SSW’08)}, series = {CEUR-WS}, year = {2008}, address = {Aachen}, url = {http://sunsite.informatik.rwth-aachen.de/Publications/CEUR-WS/Vol-417/} } @inproceedings{ubo:27403, author = {Budweg, Steffen and Stevens, Gunnar and Koch, Thomas and Törpel, Bettina}, editor = {Herczeg, Michael and Kindsmüller, Christof Martin}, chapter = {}, title = {"Medium and Mechanism" - Zur Rolle von Koordinatoren in der Praxis.}, year = {2008}, publisher = {Oldenbourg Verlag}, address = {München}, isbn = {978-3-486-58900-9}, booktitle = {Mensch & Computer 2008: 8. fachübergreifende Konferenz für interaktive Medien - Viel Mehr Interaktion} } @inproceedings{ubo:19282, author = {Heim, Philipp and Dalli, Deniz and Ziegler, Jürgen}, editor = {Herczeg, Michael and Kindsmüller, Christof Martin}, chapter = {}, title = {ListGraph: Visuelle Analyse von RDF-Daten}, year = {2008}, publisher = {Oldenburg}, address = {München}, isbn = {978-3-486-58900-9}, booktitle = {Mensch und Computer 2008} } @inproceedings{ubo:19284, author = {Lohmann, Steffen and Ziegler, Jürgen and Heim, Philipp}, editor = {Forbrig, Peter and Paternò, Fabio}, chapter = {}, title = {Involving End Users in Distributed Requirements Engineering}, year = {2008}, publisher = {Springer}, address = {Berlin, Heidelberg}, abstract = {Active involvement of end users in the development of interactive systems is both highly recommended and highly challenging. This is particularly true in settings where the requirements of a large number of geographically distributed users have to be taken into account. In this paper, we address this problem by introducing an integrated, web-based approach that enables users to easily express their ideas on how the interaction with a system could be improved. In addition, the user input is contextualized, allowing for highly structured means to access, explore, and analyze the user requirements.}, isbn = {9783540859918}, booktitle = {Engineering Interactive Systems 2008} } @inproceedings{ubo:19843, author = {El Jerroudi, Zoulfa and Ziegler, Jürgen}, editor = {Herczeg, Michael and Kindsmüller, Christoph}, chapter = {}, title = {Interaktive visuelle Analyse für die Zusammenführung von Ontologien}, year = {2008}, publisher = {Oldenbourg Verlag}, address = {München}, abstract = {In dieser Arbeit werden neue interaktive und visuelle Analysetechniken vorgestellt, die den kognitiven Prozess beim Vergleichen und Zusammenführen von Ontologien unterstützen. Der Schwerpunkt der Arbeit liegt auf der Nachvollziehbarkeit des Merging-Prozesses für den Nutzer und auf der Exploration von Vergleichsergebnissen durch dynamische Visualisierungskomponenten. Der hier vorgestellte Ontologie-Editor iMERGE erlaubt nicht nur die Erzeugung aussagekräftiger visueller Darstellungen, sondern ermöglicht auch ein hohes Maß an Interaktion. Dies bezieht sich sowohl auf die Steuerung der visuellen Repräsentation der Ontologie, als auch auf die Interaktion mit den Ergebnissen des Vergleichssprozesses.}, isbn = {978-3-486-58900-9}, booktitle = {Mensch und Computer 2008: Viel Mehr Interaktion} } @inproceedings{ubo:19846, author = {El Jerroudi, Zoulfa and Ziegler, Jürgen}, chapter = {}, title = {iMERGE: Interactive Ontology Merging}, year = {2008}, publisher = {Springer}, address = {Acitrezza, Italy}, abstract = {In this paper we present novel visual analytics techniques which help the user in the process of interactive ontology mapping and merging. A major contribution will be the strong integration and coupling of interactive visualizations with the merging process enabling the user to follow why concepts are merged and at which position in the ontology they are merged. For this purpose, adapted ontology similarity measures and new techniques for representing ontologies will be required to enable responsive, real time visualization and exploration of the comparing and merging results.}, booktitle = {EKAW 2008 – 16th International Conference on Knowledge Engineering and Knowledge Management Knowledge Patterns} } @inproceedings{ubo:19281, author = {Heim, Philipp and Ziegler, Jürgen}, editor = {Tochtermann, Klaus and Maurer, Hermann}, chapter = {}, title = {Handling the Complexity of RDF Data: Combining List and Graph Visualization}, year = {2008}, publisher = {J.UCS}, address = {Graz}, booktitle = {Proceedings of the 8th International Conference on Knowledge Management (I-KNOW 08)} } @inproceedings{ubo:19280, author = {Heim, Philipp and Lohmann, Steffen and Lauenroth, Kim and Ziegler, Jürgen}, chapter = {}, title = {Graph-based Visualization of Requirements Relationships}, year = {2008}, publisher = {IEEE}, address = {Los Alamitos, CA, USA}, abstract = {Understanding the relationships between require- ments is important in order to understand the requirements themselves. Existing requirements management tools mainly use lists, tables, trees, and matrices to visualize requirements and their interrelations. However, all these visualization forms have a limited capability to show multiple relationships of different types. In this paper, we propose to extend traditional requirements analysis and management by a graph-based visualization that allows to represent multidi- mensional relations in a direct and flexible way. In particular, we propose a special presentation form that enables the exploration of requirements along their relationships and facilitates understanding of dependencies between requirements.}, isbn = {978-0-7695-3629-3}, booktitle = {Proceedings of the 3rd International Workshop on Requirements Engineering Visualization (REV 08)} } @inproceedings{ubo:19692, author = {Heim, Philipp and Ziegler, Jürgen and Lohmann, Steffen}, editor = {Auer, Sören and Dietzold, Sebastian and Lohmann, Steffen and Ziegler, Jürgen}, chapter = {}, title = {gFacet: A Browser for the Web of Data}, year = {2008}, publisher = {CEUR-WS}, address = {Aachen}, abstract = {This paper introduces a new approach to browsing the Web of data by combining graph-based visualization with faceted filtering techniques. The graph-based visualization of facets supports the integration of different domains and an efficient exploration of highly structured and interrelated datasets. It allows to access information from distant user-defined perspectives and thereby enables the exploration beyond the borders of Web pages.}, url = {http://sunsite.informatik.rwth-aachen.de/Publications/CEUR-WS/Vol-417/paper5.pdf}, booktitle = {Proceedings of the International Workshop on Interacting with Multimedia Content in the Social Semantic Web (IMC-SSW’08)} } @inproceedings{ubo:19295, author = {Lohmann, Steffen and Ziegler, Jürgen}, editor = {Hegering, Heinz-Gerd and Lehmann, Axel and Ohlbach, Jürgen Hans and Scheideler, Christian}, chapter = {}, title = {Contextualizing Requirements Elicitation – Ein Ansatz zur kontextsensitiven Erfassung von Nutzeranforderungen}, year = {2008}, publisher = {Köllen}, address = {Bonn}, isbn = {9783885792284}, booktitle = {Informatik 2008, Beherrschbare Systeme - dank Informatik, Band 2, Beiträge der 38. Jahrestagung der Gesellschaft für Informatik e.V.} } @inproceedings{ubo:22358, author = {Betz, Matthias and Glukhova, Anna and Joop, Björn and Veiel, Dirk}, editor = {Isaías, Pedro and Nunes, Baptista Miguel and Ifenthaler, Dirk}, chapter = {}, title = {Context Adaptive Interaction in Cooperative Knowledge-Intense Processes}, year = {2008}, publisher = {IADIS Press}, address = {[S.l.]}, abstract = {In the field of CSCW and groupware systems context-adaptivity plays an important role for computer supported knowledge-intense cooperative processes. In this contribution four different perspectives are combined into one integrated conceptual approach for context adaptive interaction: cooperative service-oriented tailoring for contextual adaptation, a probabilistic concept to provide an adaptive semantic desktop, the integration of real life knowledge- and collaboration-artefacts and traceably requirements engineering for communities-of-practice in this application domain. These four approaches are combined in one common context-model which is the basis for further research. This paper presents a structured and integrated overview of this undertaking followed by some experiences and lessons learned from the cooperative modelling activities in this heterogeneous field.}, booktitle = {Proceedings of the IADIS International Conference WWW INTERNET 2008 Freiburg, Germany} } @inproceedings{ubo:18143, author = {Lohmann, Steffen and Riechert, Thomas and Auer, Sören and Ziegler, Jürgen}, editor = {Maalej, Walid and Brügge, Bernd}, chapter = {}, title = {Collaborative Development of Knowledge Bases in Distributed Requirements Elicitation}, year = {2008}, publisher = {Köllen}, address = {Bonn}, abstract = {One of the main challenges in distributed software development is the elicitation and management of knowledge regarding system requirements. Due to spatial distribution of involved parties, many limitations concerning interaction, communication, and conceptualization have to be faced. The SoftWiki project aims to provide an agile, wiki-based methodology to overcome these limitations in part. This paper introduces the SoftWiki approach and presents some of the tools that are developed to support knowledge sharing in distributed requirements engineering.}, isbn = {3885792161}, booktitle = {Software Engineering 2008 - Workshopband} } @inproceedings{ubo:14866, author = {Hussein, Tim and Ziegler, Jürgen}, chapter = {}, title = {Adapting web sites by spreading activation in ontologies}, year = {2008}, address = {Gran Canaria}, booktitle = {ReColl ’08: Int. Workshop on Recommendation and Collaboration (in conjunction with IUI 2008)} } @inproceedings{ubo:27402, author = {Budweg, Steffen}, chapter = {}, title = {User Involvement and Co-Creation - Exploring Living Labs and Participatory Design in Distributed Contexts}, year = {2008}, booktitle = {CHI 2008 Workshop on Distributed Participatory Design.} } @inproceedings{ubo:27404, author = {Budweg, Steffen and Törpel, Bettina and Pipek, Volkmar}, chapter = {}, title = {Design Communication & Communication Design - Setting up a Virtual Living Lab across Distributed Spheres of Design & Use.}, year = {2008}, abstract = {In this paper we describe an approach to support the distributed design of Collaborative Work Environments inspired by Living Labs and Participatory Design. We explore potential benefits of Living Labs for CWE & ICT design and reflect on concepts of this increasingly popular approach to user-centered innovation and co-creation. Finally, we inspect experiences made so far and potential challenges in bringing together concepts from Living Labs, Open Innovation and Participatory Design in distributed contexts.}, booktitle = {31th Information Systems Research Seminar in Scandinavia} } @inbook{ubo:18142, author = {Lohmann, Steffen and Fienhold, Jan and Riechert, Thomas}, editor = {Meißner, Klaus and Engelien, Martin}, chapter = {Gemeinschaftliche Strukturierung von Inhalten im elektronisch unterstützten Lernen}, title = {Virtuelle Organisation und Neue Medien 2007: Workshop GeNeMe 2007 - Gemeinschaften in Neuen Medien}, year = {2007}, publisher = {TUDpress}, address = {Dresden}, isbn = {3940046361} } @inbook{ubo:17797, author = {Lohmann, Steffen and Riechert, Thomas and Fienhold, Jan}, editor = {Rensing, Christoph and Rößling, Guido}, chapter = {Netzwerkeffekte, Dynamik und Feedback durch die Integration von Social Tagging in E-Learning-Umgebungen}, title = {Proceedings der Pre-Conference Workshops der 5. e-Learning Fachtagung Informatik}, year = {2007}, publisher = {Logos}, address = {Berlin}, abstract = {Die Erstellung, Strukturierung und Pflege von Inhalten in Lernplattformen wird bislang vornehmlich von Lehrenden durchgeführt, was die Herausbildung wesentlicher Aspekte des Gruppenlernens wie Dynamik und Netzwerkeffekte erschwert. Ein Aufgreifen von Web 2.0-Konzepten erscheint vielversprechend, um Lernende stärker an der Gestaltung von Lernplattformen zu beteiligen. Dieser Bei-trag thematisiert die Integration von Social Tagging in E-Learning-Umgebungen. Es wird eine prototypische Implementierung und deren Einsatz in der universitären Lehre beschrieben. Hierauf basierend werden erste Erkenntnisse und Anforderungen an zukünftige Entwicklungen in diesem Bereich abgeleitet}, isbn = {9783832516741} } @inproceedings{ubo:18065, author = {Riechert, Thomas and Lohmann, Steffen}, editor = {Auer, Sören and Bizer, Christian and Müller, Claudia and Zhdanova, V. Anna}, chapter = {}, title = {Mapping Cognitive Models to Social Semantic Spaces - Collaborative Development of Project Ontologies}, year = {2007}, publisher = {Köllen}, address = {Bonn}, abstract = {In this paper, we present an approach that applies concepts from the areas of Social Software and Semantic Web to application development. We start with a short introduction into Semantic Based Requirements Engineering. Then, we present an ontology for capturing requirements and related information. Based on this ontology, we describe how stakeholders are enabled to directly participate in requirements elicitation and to collaboratively create a project ontology. Finally, we report about the application of the presented approach in a use case from the e-government domain.}, isbn = {9783885792079}, url = {http://ftp.informatik.rwth-aachen.de/Publications/CEUR-WS/Vol-301/Paper_8_Riechert.pdf}, booktitle = {The Social Semantic Web 2007 - Proceedings of the 1st Conference on Social Semantic Web (CSSW)} } @inproceedings{ubo:18138, author = {Fienhold, Jan and Riechert, Thomas and Lohmann, Steffen}, editor = {Dötsch, Volker and Hering, Klaus and Schaar, Florian}, chapter = {}, title = {Der Lecture Tagger: Social Tagging in E-Learning-Umgebungen}, year = {2007}, address = {Leipzig}, booktitle = {Proceedings of the Workshop on e-Learning 2007} } @inproceedings{ubo:14860, author = {Hüsken, P. and Ziegler, J.}, chapter = {}, title = {Visualisierung und Editieren komplexer Ontologien mit einer adaptiven Baum-Komponente}, year = {2007}, publisher = {Oldenbourg}, booktitle = {7. GI-Konferenz Mensch Computer 2007} } @inproceedings{ubo:14858, author = {Lohmann, Steffen and Heim, Philipp and Ziegler, Jürgen}, editor = {Auer, Sören and Bizer, Christian and Müller, Claudia and Zhdanova, V. Anna}, chapter = {}, title = {Semantic Integrator: Semi-Automatically Enhancing Social Semantic Web Environments}, year = {2007}, publisher = {Köllen}, address = {Bonn}, abstract = {Large amounts of information from various sources have often to be considered when collaboratively developing semantic structures. Examining all relevant information can be very demanding and time consuming. Thus, methods and tools are needed that assist in the integration of this heterogeneous and distributed information. Based on an approach that uses Social Software and Semantic Web technology in requirements engineering, this paper describes the general concept and architecture of the Semantic Integrator, a tool that aims at visually support the integration of distributed information into semantic structures.}, isbn = {9783885792079}, booktitle = {The Social Semantic Web 2007 - Proceedings of the 1st Conference on Social Semantic Web (CSSW)} } @inproceedings{ubo:18139, author = {Cyriaks, Heiko and Lohmann, Steffen and Stolz, Horst and Velioglu, Veli and Ziegler, Jürgen}, editor = {Auer, Sören and Bizer, Christian and Müller, Claudia and Zhdanova, V. Anna}, chapter = {}, title = {Semantische Aufbereitung von Dokumentenbeständen zur Gewinnung anforderungsrelevanter Informationen}, year = {2007}, publisher = {Köllen}, address = {Bonn}, abstract = {Bei der umfassenden Erhebung von Anforderungen muss häufig eine Vielzahl bereits vorhandener Dokumente berücksichtigt werden. Die Aufbereitung und Auswertung dieser Dokumente kann mit einem hohen Aufwand verbunden sein. Um diese Aktivitäten zu erleichtern, werden im SoftWiki-Ansatz Text Mining-Verfahren eingesetzt, die mittels statistischer und korpuslinguistischer Analysen Dokumentenbestände automatisiert vorverarbeiten. Es werden Worthäufigkeiten berechnet und statistisch signifikante Nachbarschafts- und Satz-Kookkurrenzen identifiziert. Das Ergebnis wird als RDF-Graph ausgegeben und in Form eines semantischen Netzes visualisiert. Hierdurch werden ein thematischer Überblick über den Dokumentenbestand und ein leichterer Zugriff auf Teile davon ermöglicht. Die Visualisierung und aktive Filtermöglichkeiten unterstützen die Identifizierung von anforderungsrelevanten Informationen.}, isbn = {9783885792079}, booktitle = {The Social Semantic Web 2007 - Proceedings of the 1st Conference on Social Semantic Web (CSSW)} } @inproceedings{ubo:18140, author = {Lohmann, Steffen and Ziegler, Jürgen}, editor = {Auer, Sören and Bizer, Christian and Müller, Claudia and Zhdanova, V. Anna}, chapter = {}, title = {Partizipationsformen und Entwicklung eines gemeinsamen Verständnisses bei der verteilten Anforderungserhebung}, year = {2007}, publisher = {Köllen}, address = {Bonn}, abstract = {Die webbasierte, verteilte Anforderungserhebung geht mit Herausforderungen einher, die neuartige Partizipations- und Interaktionsformen notwendig machen. Vor diesem Hintergrund präsentieren wir im vorliegenden Beitrag Lösungsansätze, die im Rahmen des SoftWiki-Projekts entwickelt werden. Zunächst er-läutern und vergleichen wir die unterstützten Formen der Stakeholder-Partizipation. Anschließend thematisieren wir die semantische Anreicherung von Anforderungen. Hierbei stellen wir einen Ansatz vor, bei dem durch gemeinsame Verschlagwortung von Stakeholder-Beiträgen ein kollektiver Begriffsraum entsteht, der sich als Ausgangspunkt für die Klassifizierung von Anforderungen und die Entwicklung eines gemeinsamen Verständnisses vom zu entwickelnden Produkt eignet.}, isbn = {9783885792079}, booktitle = {The Social Semantic Web 2007 - Proceedings of the 1st Conference on Social Semantic Web (CSSW)} } @inproceedings{ubo:14861, author = {Lohmann, Steffen and Kaltz, Wolfgang J. and Ziegler, Jürgen}, editor = {Kühne, Thomas}, chapter = {}, title = {Model-Driven Dynamic Generation of Context-Adaptive Web User Interfaces}, year = {2007}, publisher = {Springer}, address = {Berlin, Heidelberg}, abstract = {The systematic development of user interfaces that enhance interaction quality by adapting to the context of use is a desirable, but also highly challenging task. This paper examines to which extent contextual knowledge can be systematically incorporated in the model-driven dynamic generation of Web user interfaces that provide interaction for operational features. Three parts of the generation process are distinguished: selection, parameterization, and presentation. A semantically enriched service-oriented approach is presented that is based on the Catwalk framework for model interpretation and generation of adaptive, context-aware Web applications. Automation possibilities are addressed and an exemplary case study is presented.}, isbn = {9783540694885}, booktitle = {Models in Software Engineering - Workshops and Symposia at MoDELS 2006} } @inproceedings{ubo:18191, editor = {Lang, Eike and Ziegler, Jürgen and Wissen, Michael and Lang, Eike and Ziegler, Jürgen and Wissen, Michael}, chapter = {}, title = {Modellgetriebene Generierung von Webanwendungsprototypen}, year = {2007}, publisher = {Oldenbourg}, address = {München}, abstract = {Existierende Entwicklungsmethoden und Werkzeuge für das Software-Engineering unterstützen die Entwicklung informationsgetriebener Webanwendungen nur unzureichend und finden in der Praxis daher kaum Anwendung. Im BMBF-geförderten Projekt ?Web Information and Service Engineering“ (WISE) entstand ein werkzeugunterstützter Methodenverbund, der speziell auf die Bedürfnisse bei der Entwicklung webbasierter Informationssysteme zugeschnitten ist. Die Modellierung erfolgt auf Basis von Ontologien und leicht verständlichen Navigationsmodellen. Ein grafischer Editor ermöglicht die Erstellung und Pflege der Modelle und übergibt diese an eine Generatorkomponente, die automatisiert funktionsfähige Webanwendungs-Prototypen erzeugt.}, isbn = {978-3486584967}, url = {http://mc.informatik.uni-hamburg.de/konferenzbaende/mc2007/konferenzband/mc2007_30_lang.pdf}, booktitle = {Mensch und Computer 2007: Interaktion im Plural} } @article{ubo:14862, author = {El Jerroudi, Z. and Ziegler, J.}, title = {Interaktives Vergleichen und Zusammenführen von Ontologien}, journal = {i-com: Zeitschrift für interaktive und kooperative Medien}, year = {2007}, volume = {6}, number = {3}, pages = {44–49}, abstract = {In dieser Arbeit werden semi-automatische Verfahren vorgestellt, die den Domänenexperten beim interaktiven Vergleichen und Zusammenführen von Ontologien unterstützen sollen. Das Ziel beim Vergleichen von zwei Ontologien besteht darin, eine Abbildung zwischen der Quell- und Zielontologie zu finden, die dem Nutzerverständnis einer semantischen Entsprechung am nächsten kommt. Für die Initialisierung des Vergleichsprozesses startet der iMERGING-Editor mit der linguistischen Ähnlichkeit von zwei Konzepten, danach werden die strukturellen Eigenschaften der Ontologie berücksichtigt und im dritten Schritt wird die Ähnlichkeit aufgrund zusätzlich vorhandener Informationen wie die Verknüpfung mit Dokumenten untersucht. Nutzereingaben, wie das Ablehnen oder Ändern eines Mappings, werden im Vergleichsprozess interaktiv berücksichtigt, so dass Domänenwissen des Nutzers mit einbezogen werden kann, um semantische Entsprechungen zwischen zwei Elementen der Wissensstruktur zu finden.}, issn = {1618-162X} } @inproceedings{ubo:14865, author = {Ziegler, J. and Beinhauer, W.}, chapter = {}, year = {2007}, publisher = {Oldenbourg}, booktitle = {}, title = {Interaktion mit komplexen Informationsräumen: Visualisierung, Multimodalität, Kooperation} } @book{ubo:17816, editor = {Ziegler, Jürgen and Beinhauer, Wolfgang}, title = {Interaktion mit komplexen Informationsräumen: Visualisierung, Multimodalität, Kooperation}, year = {2007}, publisher = {Oldenbourg}, address = {München}, isbn = {9783486275179} } @inproceedings{ubo:18621, author = {Niesenhaus, Jörg}, editor = {Jantke, P. Klaus and Fähnrich, Klaus-Peter and Wittig, S. Wolfgang}, chapter = {}, title = {Integration technologischer und methodischer Grundlagen digitaler Spiele in die Hochschullehre am Beispiel interdisziplinärer Praxisprojekte}, year = {2007}, publisher = {Verlag Werner Hülsbusch}, address = {Boizenburg}, booktitle = {Digitale Spiele – Herausforderungen und Chance: Kongressband einer wissenschaftlichen Tagung anlässlich der Leipziger Informatik-Tage} } @inproceedings{ubo:14863, author = {Hüsken, P. and Ziegler, J.}, editor = {Baranauskas, M. and Palanque, P. and Abascal, J. and Barbarosa, S.}, chapter = {}, title = {Degree-of-interest visualization for ontology exploration}, year = {2007}, publisher = {Springer}, booktitle = {INTERACT 2007 - 11th IFIP TC13 Intl. Conf. on Human-Computer Interaction} } @inproceedings{ubo:14864, author = {Malzahn, N. and Weinbrenner, S. and Hüsken, P. and Ziegler, J. and Hoppe, H.U.}, chapter = {}, title = {Collaborative ontology development - Distributed architecture and visualization}, year = {2007}, booktitle = {GES2007: German e-Science Conference} } @inproceedings{ubo:18141, author = {Lohmann, Steffen and Ziegler, Jürgen}, editor = {Koschke, Rainer and Otthein, Herzog and Rödiger, Karl-Heinz and Ronthaler, Marc}, chapter = {}, title = {Bringing Semantics into Folksonomies – Semantische Analyse nutzergenerierter Indexierungen}, year = {2007}, publisher = {Köllen}, address = {Bonn}, abstract = {Die zunehmende Popularität des gemeinschaftlichen Indexierens (Social Tagging) führt zu umfangreichen Sammlungen an nutzergenerierten Metadaten. Eine automatisierte Verwertung und interoperable Nutzung dieser Daten ist jedoch schwierig, da sie nur eine geringe formale Semantik aufweisen. In diesem Beitrag wird ein konzeptioneller Rahmen für die Abbildung von Tags auf Ontologiekon-zepte aufgestellt und anhand eines Beispielszenarios veranschaulicht}, isbn = {9783885792061}, booktitle = {Informatik 2007 - Informatik trifft Logistik, Band 1, Beiträge der 37. Jahrestagung der Gesellschaft für Informatik e.V.} } @inproceedings{ubo:16723, author = {Hussein, Tim and Westheide, Daniel and Ziegler, Jürgen}, editor = {Hinneburg, Alexander}, chapter = {}, title = {Context-adaption based on ontologies and spreading activation}, year = {2007}, address = {Martin-Luther-Universität Halle-Wittenberg}, abstract = {Ontologies and spreading activation are known terms within the scope of information retrieval. In this paper we introduce SPREADR, an integrated adaptation mechanism for web applications that uses ontologies for representing the application domain as well as context information like location, user history and local time. Those context factors can be modeled in an ontology and be linked to certain domain nodes. In each session a Spreading Activation Network is build based on those ontologies and recognized context factors or user actions can trigger an activation flow through this network. A node’s resulting activation value then represents its importance according to the current circumstances. While identically in structure, the Spreading Activation Networks are personalized by automatically modifying link weights and activation levels of nodes. As a result the system learns about the user preferences and can adjust its adaptation mechanism for future runs through implicit feedback.}, isbn = {978-3-86010-907-6}, booktitle = {LWA 2007: Lernen – Wissen – Adaption} } @inproceedings{ubo:27405, author = {Voß, Alexander and Procter, Rob and Budweg, Steffen and Prinz, Wolfgang}, chapter = {}, title = {Collaboration in and for e-Research: making the ’O’ in virtual organisation work}, year = {2007}, abstract = {Collaboration support for knowledge-intensive work such as e-Research is still very fragmented and collaboration across organisational and disciplinary boundaries is difficult to achieve. We sketch out a programme of research that will build on existing work in the areas of collaborative work environments and virtual research environments to overcome these problems by focusing on conceptual issues, (design) methodology and technology development.}, url = {http://vg00.met.vgwort.de/na/2db8ae4d7e0a12083645f0f553612e?l=http://publica.fraunhofer.de/eprints/urn:nbn:de:0011-n-704453.pdf}, booktitle = {German e-Science Conference 2007} } @inproceedings{ubo:14854, author = {Kaltz, J. and Ziegler, J.}, chapter = {}, title = {Supporting systematic usage of context in Web applications}, year = {2006}, booktitle = {19th International FLAIRS Conference, special track on Modeling and Applying Contexts in the Real World (MAC-06)} } @inproceedings{ubo:18620, author = {Gerling, Kathrin and Thieme, Anja and Niesenhaus, Jörg and Specker, Wilhelm Markus and Ziegler, Jürgen}, editor = {Heinecke, M. A. and Paul, H.}, chapter = {}, title = {Spielerverhalten und Storyerzeugung in interaktiven Spielumgebungen am Beispiel der Grimmix Story-Engine}, year = {2006}, edition = {6. GI-Konferenz Mensch und Computer 2006}, publisher = {Oldenbourg Wissenschaftsverlag}, address = {München}, booktitle = {Mensch & Computer 2006: Strukturwandel} } @inproceedings{ubo:23931, author = {Mambrey, Peter and Pipek, V. and Budweg, Steffen}, editor = {Hochberger, C. and Liskovsky, R.}, chapter = {}, title = {Sozio-technische Infrastrukturen für demokratische Prozesse: Praxis und Perspektiven.}, year = {2006}, publisher = {Ges. für Informatik}, address = {Bonn}, abstract = {Zum dritten Mal wird ein Workshop veranstaltet, der sich dem Thema sozio-technischer Infrastrukturen für demokratische Prozesse widmet. Dabei ist ein Wandel zu beobachten: Die Diskussion von Konzepten, ihren Herausforderungen und Risken, wird ergänzt um Praxisberichte von prototypischen Anwendungen. Diese Erprobungen bieten Stoff zur neuen Diskussionen. Obwohl die praktischen Erfahrungen idiosynkratisch sind, lässt sich auf deren Basis viel zielorientierter diskutieren, ob und wie denn eine Ausgestaltung und politisch-kulturelle Einbettung dieser neuen Medien erfolgen soll oder kann. Dabei werden Fragen aufgeworfen, die eher politiknäher (Vertrauen in Wahlmaschinen) oder techniknäher (Visualisierung von Argumenten) sind. Die Europäische Kommission unterstützt seit Jahren die Entwicklung von Information Society Technolgies (IST).}, url = {http://www.uni-siegen.de/fb5/cio/publikationen/dokumente/2006/mambreypipekbudweg_sozio-technische_infrastrukturen_fuer_demokratische_prozesse_2006.pdf}, booktitle = {Informatik 2006: Informatik für Menschen.} } @book{ubo:18618, author = {Niesenhaus, Jörg}, title = {Playful Computing}, series = {i-com: Zeitschrift für interaktive und kooperative Medien}, year = {2006}, publisher = {Oldenbourg Wissenschaftsverlag}, address = {München} } @inproceedings{ubo:14855, author = {Specker, M. and Niesenhaus, J. and Ziegler, J.}, chapter = {}, title = {Gestaltungsdimensionen im interaktiven digitalen Storytelling}, year = {2006}, publisher = {Oldenbourg-Verlag}, address = {München}, booktitle = {6. GI-Konferenz Mensch und Computer 2006} } @inproceedings{ubo:18135, author = {Lohmann, Steffen and Kaltz, Wolfgang J. and Ziegler, Jürgen}, editor = {Hochberger, Christian and Liskowsky, Rüdiger}, chapter = {}, title = {Dynamische Generierung kontextadaptiver Benutzungsschnittstellen durch Modellinterpretation}, year = {2006}, publisher = {Köllen}, address = {Bonn}, abstract = {Bei der modellbasierten Entwicklung von interaktiven Systemen ist die effiziente und homogene Integration von Benutzungsschnittstellen, die sich optimal in die jeweilige Interaktionssituation einfügen, mit zahlreichen Herausforderungen verbunden. Dieser Beitrag untersucht, inwieweit Kontextwissen methodisch fundiert in die Modellierung und den Prozess der automatischen Generierung von webbasierten Benutzungsschnittstellen einbezogen werden kann, um diese an die kontextuellen Gegebenheiten anzupassen und die Benutzerinteraktion zu unterstützen. Dabei werden drei Teilbereiche unterschieden: die Auswahl situativ geeigneter Systemfunktionen, die Erstellung von an den Kontext angepassten Benutzungsschnittstellen für diese Funktionen und deren Parametrisierung. Ein ontologiebasiertes Modellierungsvorgehen und ein Framework für kontextadaptive Webanwendungen liefern die Grundlage für den hier beschriebenen Ansatz.}, isbn = {978-3-88579-188-1}, booktitle = {Informatik 2006 - Informatik für Menschen, Band 2, Beiträge der 36. Jahrestagung der Gesellschaft für Informatik e.V.} } @inproceedings{ubo:18137, author = {Lohmann, Steffen and Kaltz, Wolfgang J. and Ziegler, Jürgen}, editor = {Pleuss, Andreas and Van den Bergh, Jan and Hussmann, Heinrich and Sauer, Stefan and Boedcher, Alexander}, chapter = {}, title = {Dynamic Generation of Context-Adaptive Web User Interfaces through Model Interpretation}, year = {2006}, address = {Genua, Italien}, booktitle = {Proceedings of the MoDELS’06 Workshop on Model Driven Development of Advanced User Interfaces} } @article{ubo:18134, author = {Ziegler, Jürgen and Kaltz, Wolfgang J. and Lohmann, Steffen}, title = {Das ’intelligente’ Web - Entwicklung kontextadaptiver Webanwendungen}, journal = {Essener Unikate}, year = {2006}, volume = {28}, pages = {18–29}, issn = {0944-6060} } @inproceedings{ubo:18193, author = {Ziegler, Jürgen and Strobl, Armin and Wolsing, Ansgar and Mohr, Christina and Lotze, Rouven and Lang, Eike}, editor = {Heinecke, M. Andreas and Paul, Hansjürgen}, chapter = {}, title = {ARTierchen - Augmented Reality in Touch}, year = {2006}, publisher = {Oldenburg}, address = {München}, abstract = {Augmented Reality (AR) ist eine Technik, welche die reale Welt um virtuelle Objekte erweitert. Unter Nutzung von mobilen Geräten und speziellen AR-Displays können auch virtuelle Spielwelten in räum- liche Umgebungen eingebettet werden. Im vorliegenden Beitrag sollen am Beispiel des Augmented- Reality-Spiels ?ARTierchen“ die Möglichkeiten dargestellt werden, die sich dem Entwickler durch die computergerenderte visuelle Erweiterung einer zugrunde liegenden natürlichen Spielwelt für interakti- ve 3D-Spiele bieten.}, isbn = {978-3486581294}, url = {http://mc.informatik.uni-hamburg.de/konferenzbaende/mc2006/konferenzband/muc2006_46_strobl_etal.pdf}, booktitle = {Mensch und Computer 2006: Mensch und Computer im Strukturwandel} } @inproceedings{ubo:14856, author = {Ressel, C. and Ziegler, J. and Naroska, E.}, chapter = {}, title = {An approach towards personalized user interfaces for smart homes}, year = {2006}, booktitle = {2nd IET Int. Conf. on Intelligent Environments (IE ’06)} } @inproceedings{ubo:14857, author = {Ressel, C. and Ziegler, J.}, chapter = {}, title = {Adaptive Nutzerschnittstelle für intelligente Wohnumgebungen}, year = {2006}, publisher = {Oldenbourg}, booktitle = {6. GI-Konferenz Mensch und Computer 2006 (Gelsenkirchen)} } @inproceedings{ubo:18619, author = {Niesenhaus, Jörg and Specker, Wilhelm Markus and Ziegler, Jürgen}, editor = {Pohl, Margit and Holzinger, Andreas and Motschnig, Renate and Swertz, Christian}, chapter = {}, title = {A Design Space for Interactive Digital Storytelling}, year = {2006}, edition = {M3 - Interdisciplinary Aspects on Digital Media & Education}, publisher = {Austrian Computer Society}, address = {Wien}, isbn = {978-3-85403-213-7}, booktitle = {Proceedings of the 2nd Symposium of the WG HCI & UE of the Austrian Computer Society} } @article{ubo:18136, author = {Ziegler, Jürgen and Kaltz, Wolfgang J. and Lohmann, Steffen and Hussein, Tim}, title = {Maßarbeit statt Konfektion - Kontextadaption liefert passgenaue Informationen}, journal = {Forum Forschung}, year = {2006}, pages = {42–47} } @inproceedings{ubo:23932, author = {Budweg, Steffen and Fischer, J.E. and Mambrey, Peter and Pankoke-Babatz, U.}, editor = {Heinecke, A.M. and Paul, H.}, chapter = {}, title = {Kommunikative Vernetzung in der universitären Lehre.}, year = {2006}, address = {München}, abstract = {In diesem Beitrag gehen wir der Frage nach, welche Medien im Rahmen eines Seminars genutzt werden und welche kommunikativen Beziehungen aufgebaut bzw. gefördert werden. Dazu stellen wir Ergebnisse einer Befragung zur Mediennutzung von Studierenden vor, die im Rahmen einer Langzeitstudie erhoben wurden. Wir sind davon ausgegangen, dass durch die Nutzung mehrerer Medien in einem Seminar die Vernetzung unter den Teilnehmern steigen wird und neue Teilnehmer einbezogen werden. Die Ergebnisse unserer Untersuchung zeigen aber, dass dies nur zögerlich geschieht. Entscheidend für die kommunikative Vernetzung ist der Kontext, innerhalb derer Studierende arbeiten und nicht das Medienangebot.}, isbn = {978-3-486-58129-4}, url = {http://www.mrl.nott.ac.uk/ jef/Budweg,Fischer,Mambrey,Pankoke-Babatz06_KommunikativeVernetzung_final_draft.pdf}, booktitle = {Mensch & Computer 2006: Mensch und Computer im StrukturWandel.} } @inproceedings{ubo:27407, author = {Törpel, Bettina and Poschen, Meik and Budweg, Steffen and Voß, Alexander and Burtschick, Hans-Jörg}, chapter = {}, title = {Creating Functionality from the Standpoint of the Subject - From the Objectification of Purposes in Artifacts to the Integration of Contributions in Spaces of Action.}, year = {2006}, booktitle = {29th Information Systems Research Seminar in Scandinavia} } @inproceedings{ubo:27406, author = {Budweg, Steffen and Törpel, Bettina and Burtschick, Hans-Jörg and Pipek, Volkmar and Poschen, Meik}, chapter = {}, title = {Contributing to Functionality - The Case of a Network of Union Educators.}, year = {2006}, booktitle = {29th Information Systems Research Seminar in Scandinavia} } @inbook{ubo:17796, author = {Pinkwart, Niels and Harrer, Andreas and Lohmann, Steffen and Vetter, Stefan}, editor = {Uskov, Vladimir}, chapter = {Integrating Portal Based Support Tools to Foster Learning Communities in University Courses}, title = {Proceedings of the 4th International Conference on Web-Based Education}, year = {2005}, publisher = {Acta Press}, address = {Anaheim}, abstract = {This paper identifies four criteria for systems that aim at supporting learning communities in university courses, and describes the web-based environment iPAL (internet Portal to Augment Learning) that addresses these criteria in an integrated manner. The iPAL environment extends a freely available content management system through some self-developed components. Practical experiences with the system are outlined, and a first evaluation is given.}, isbn = {0889864802} } @inproceedings{ubo:14850, author = {Ziegler, Jürgen and Lohmann, Steffen and Kaltz, Wolfgang J.}, editor = {Stary, Christian}, chapter = {}, title = {Kontextmodellierung für adaptive webbasierte Systeme}, year = {2005}, publisher = {Oldenbourg}, address = {München}, abstract = {Adaptive Web-Anwendungen erfordern die Berücksichtigung von Kontext zur Anpassung von Inhalten, Navigationsstrukturen und Präsentationsformen. Für eine systematische Entwicklung kontextadaptiver Systeme sind Methoden der Kontextmodellierung erforderlich, die die komplexen Abhängigkeiten beschreiben. In diesem Beitrag wird ein konzeptioneller Rahmen vorgestellt, der auf einer Taxonomie der verschiedenen Kontextaspekte basiert. Darüber hinaus werden unterschiedliche Mechanismen der Kontextualisierung diskutiert, die von probabilistischen Verfahren bis zu regelbasierten Techniken reichen.}, isbn = {3486578057}, url = {http://mc.informatik.uni-hamburg.de/konferenzbaende/mc2005/konferenzband/muc2005_16_ziegler_etal.pdf}, booktitle = {Mensch Computer 2005: Kunst und Wissenschaft - Grenzüberschreitungen der interaktiven ART} } @inproceedings{ubo:14853, author = {Ziegler, J. and El Jerroudi, Z. and Böhm, K.}, chapter = {}, title = {Generating semantic contexts from spoken conversation in meetings}, year = {2005}, publisher = {ACM}, address = {San Diego, California, USA}, isbn = {1-58113-894-6}, booktitle = {Proceedings of the 10th international conference on Intelligent user interfaces ( IUI 2005)} } @inproceedings{ubo:17831, author = {Kaltz, Wolfgang J. and Lohmann, Steffen and Ziegler, Jürgen}, editor = {Cremers, B. Armin and Manthey, Rainer and Martini, Peter and Steinhage, Volker}, chapter = {}, title = {Eine komponentenorientierte Architektur für die kontext-sensitive Adaption von Web-Anwendungen}, year = {2005}, publisher = {Köllen}, address = {Bonn}, abstract = {In diesem Beitrag wird ein Context Engineering-Ansatz vorgestellt, der die Integration von Methoden der ontologiebasierten Kontextmodellierung bei der Entwicklung von Web-Anwendungen systematisiert und anhand einer Systemarchitektur erläutert, wie geeignete Kontextkomponenten durch die Verwendung dieser Modelle Adaptionen durchführen, die den Benutzer bei der Suche nach relevanten Informationen und Diensten unterstützen.}, isbn = {3885793970}, booktitle = {INFORMATIK 2005 - Informatik Live!, Band 2, Beiträge der 35. Jahrestagung der Gesellschaft für Informatik e.V. (GI)} } @inproceedings{ubo:18188, author = {El Jerroudi, Zoulfa and Ziegler, Jürgen and Meissner, Stephan and Philipsenburg, Axel}, editor = {Stary, C.}, chapter = {}, title = {E-Quest: Ein Online-Befragungswerkzeug für Web Usability}, year = {2005}, publisher = {Oldenbourg Verlag}, address = {München}, abstract = {E-Quest ist ein Werkzeug zur automatisierten Online-Befragungen. Es bietet ohne großen Konfigurationsaufwand die Möglichkeit zur komfortablen Gestaltung der Fragebögen und vielfältigen Auswertungsmöglichkeiten, um die Usability einer Webseite zu evaluieren.}, booktitle = {Mensch & Computer 2005: Kunst und Wissenschaft - Grenzüberschreitungen der interaktiven ART} } @article{ubo:14852, author = {Kaltz, Wolfgang J. and Ziegler, Jürgen and Lohmann, Steffen}, title = {Context-aware Web Engineering: Modeling and Applications}, journal = {RIA - Revue d’Intelligence Artificielle, Special Issue on Applying Context-Management}, year = {2005}, volume = {19}, number = {3}, pages = {439–458}, abstract = {This article presents an approach to Web Engineering which aims to account for context-awareness in a comprehensive and integrated fashion, thus enabling an enhanced adaptation of the application to the end-user. A conceptual model, permitting the combination of a domain ontology with context-relevant parameters and a degree of relevance, is presented. Subsequently, the use of such a model in a Web Engineering process is discussed, including appropriate modeling software, and requirements for a runtime system.}, issn = {0992-499X} } @article{ubo:14851, author = {Kaltz, Wolfgang J. and Lohmann, Steffen and Hussein, Tim and Lang, Eike and Ziegler, Jürgen}, title = {Ontologiebasiertes Engineering kontextadaptiver Webanwendungen}, journal = {i-com: Zeitschrift für interaktive und kooperative Medien}, year = {2005}, volume = {4}, number = {3}, pages = {22–30}, abstract = {Angesichts des zunehmenden Leistungsumfangs moderner Informations- und Kommunikationstechnologien und einer wachsenden Informationsflut in globalen Netzen werden Methoden und Mechanismen benötigt, die den Nutzern dem jeweiligen Nutzungskontext angepasste Informationen und Dienste liefern. In diesem Beitrag wird eine ontologiebasierte Methodik vorgestellt, die die Integration von Context Engineering-Mechanismen in den Entwicklungsprozess von Webanwendungen zum Ziel hat. Anschließend wird anhand einer Architektur für kontextadaptive Webanwendungen erläutert, wie sich durch diese Vorgehensweise Kontextanpassungen auf unterschiedlichen Ebenen bewirken lassen.}, issn = {1618-162X} } @inproceedings{ubo:14847, author = {Ziegler, J. and Specker, M.}, chapter = {}, title = {Navigation Patterns - Pattern Systems Based on Structural Mappings}, year = {2004}, publisher = {Springer}, booktitle = {EHCI-DSVIS 2004 (Engineering for HCI and Design and Verification of Interactive Systems)} } @inproceedings{ubo:18190, author = {Ziegler, Jürgen and El Jerroudi, Zoulfa and Böhm, Carsten and Beinhauer, Wolfgang and Räther, Christian}, editor = {Keil-Slawik, R. and Selke, H. and Szwillus, G.}, chapter = {}, title = {Automatische Themenextraktion aus gesprochener Sprache}, year = {2004}, publisher = {Oldenbourg Verlag.}, address = {München}, abstract = {Bei vielen Formen der Kommunikation und Kooperation in Gruppensitzungen kann das Bereitstellen eines expliziten semantischen Kontextes wertvolle Unterstützung bieten. Semantische Kontexte können das gemeinsame Verständnis eines Problembereichs verbessern, die assoziative Ideenfindung unterstützen, eine moderierende Funktion in der Kommunikation übernehmen oder als Basis für Assistenzfunktionen genutzt werden. In diesem Beitrag wird ein Ansatz präsentiert, in dem semantische Kontexte aus gesprochener Konversation in Echtzeit gewonnen werden. Der vorgestellte Prototyp verknüpft Technologien zur Spracherkennung und zur Analyse unstrukturierter großer Textkorpora miteinander und extrahiert Themenstrukturen aus gesprochener Sprache durch semantisches Matching gegen Terminologiedatenbanken und Ontologien. Die Themenstrukturen werden graphisch visualisiert und in die Diskussion rückgekoppelt, um geeignete Unterstützungsfunktionen anbieten zu können.}, booktitle = {Mensch & Computer 2004: Allgegenwärtige Interaktion} } @inproceedings{ubo:14848, author = {Kaltz, W. and Ziegler, J.}, chapter = {}, title = {A conceptual model for context-aware Web engineering}, year = {2004}, booktitle = {KI 2004 Workshop on Modeling and Retrieval of Context (MRC2004)} } @inproceedings{ubo:27408, author = {Stevens, Gunnar and Budweg, Steffen and Pipek, Volkmar}, chapter = {}, title = {The "BSCWeasel" and Eclipse-powered Cooperative End User Development.}, year = {2004}, booktitle = {Workshop "Eclipse as a Vehicle for CSCW Research" at the Conference on CSCW} } @inproceedings{ubo_mods_00031008, author = {Piesk, Jens and Heeg, Ralf and Hoenscheid, Ralf and Krämer, Nicole and Bente, Gary}, editor = {Szwillus, Gerd and Ziegler, Jürgen}, title = {Echtzeit-Visualisierungs-Editor fuer deskriptive Verhaltensprotokolle}, booktitle = {Mensch & Computer 2003: Interaktion in Bewegung; [Tagungsbeiträge der dritten Konferenz Mensch & Computer 2003 in Stuttgart]}, series = {Berichte des German Chapter of the ACM}, year = {2003}, edition = {1. Auflage}, publisher = {Teubner}, address = {Stuttgart [u.a.]}, volume = {57}, pages = {177–186}, abstract = {Vor dem Hintergrund, dass multimodale Ein- und Ausgabe in anthropmorphen Schnittstellen zum face-to-face-Dialog mit virtuellen Akteuren verschmelzen, wird mit dem Echtzeit-Visualisierungs-Editor (EVE) ein System zur Erforschung der zugrunde liegenden psychologischen Wirkungszusammenhaenge der menschlichen Wahrnehmung des digitalen Verhaltens vorgestellt. EVE ist ein speziell zur effizienten Versuchsvorbereitung und -durchfuehrung im Bereich der Kommunikationspyschologie entwickelter Verhaltens- und Bewegungseditor. Aufgezeichnete menschliche Bewegungsdaten werden waehrend der Experimentalvorbereitung mittels einer bijektiven Abbildung in ein deskriptives Verhaltensprotokoll (modifizierte Berner Kodierung) in Echtzeit konvertiert, so dass der Versuchsleiter bei der Bewegungsedition im Berner Code das visuelle Ergebnis mittels eines 3D-Modells verzoegerungsfrei sieht. Sowohl bei der Experimentalvorbereitung, als auch zur Praesentation der Bewegungssequenzen bei der Versuchsdurchfuehrung werden die variierten Verhaltensprotokolle von einem echtzeitfaehigen 3D-Figuren-Player visualisiert. Mit EVE koennen psychologische Wirkungsexperimente, in denen menschliche Bewegungen aufgezeichnet werden, in deskriptive Verhaltensprotokolle konvertiert, vom Experimentator variiert und Versuchspersonen als Stimulusmaterial praesentiert, effizient vorbereitet und durchgefuehrt werden. Eine wesentliche Funktionalitaet ist der echtzeitfaehige bijektive Konvertierungsalgorithmus von deskriptiven Verhaltensprotokolldatensaetzen in Euler-Winkel. EVE wird als erster Schritt in der Realisation des Feedback-Verfahrens aus Wissensgenerierung und RE-Implementierung der neuen Befunde im Bereich der nonverbalen Kommunikation zur kontinuierlichen Optimierung eines anthropomorphen Interfaces angesehen. Die Konzeption des Arbeitsablaufes, den Funktionsumfang und die technische Realisierung dieser Plattform werden beschrieben.}, isbn = {3-519-00441-0}, doi = {10.1007/978-3-322-80058-9} } @inproceedings{ubo_mods_00031013, author = {Krämer, Nicole and Bente, Gary}, editor = {Ziegler, Jürgen and Szwillus, Gerd}, title = {Brauchen Interface-Agenten Emotionen}, booktitle = {Mensch & Computer 2003: Interaktion in Bewegung; [Tagungsbeiträge der dritten Konferenz Mensch & Computer 2003 in Stuttgart]}, series = {Berichte des German Chapter of the ACM}, year = {2003}, edition = {1. Aufl.}, publisher = {Teubner}, address = {Stuttgart [u.a.]}, volume = {57}, pages = {287–296}, abstract = {Es wird der Frage nachgegangen, welche Bedeutung der Modellierung von Emotionen bei anthropomorphen Interface-Agenten zukommt. Den Hintergrund bilden Ueberlegungen, wonach anthropomorphe Interface-Agenten neben reiner Informationsvermittlung im Sinne eines benutzerfreundlichen Ansatzes auch sozioemotionale Aufgaben erfuellen koennten: Durch den Rueckgriff auf Emotionsmodelle soll sichergestellt werden, dass in Abhaengigkeit von Nutzerverhalten und Situation ein spezifischer interner Systemzustand entsteht. Dieser interne Zustand wird (meist nonverbal) in entsprechenden Modellierungen gezeigt und soll den Benutzer in eine gewuenschte Richtung beeinflussen. Anhand von grundlagenwissenschaftlichen als auch angewandten Theorien und Modellen wird deutlich gemacht, in welchem Masse Architekturen, die ohne Emotionsmodellierung auskommen, einfacher zum Ziel fuehren koennen. Eine erste auf solchen Ueberlegungen beruhende Implementation im Rahmen der Schnittstelle des Privathaushaltdemonstrators des Projektes EMBASSI (Elektronische Multimodale Bedien- und Serviceassistenz) wird vorgestellt.}, isbn = {3-519-00441-0}, doi = {10.1007/978-3-322-80058-9} } @inproceedings{ubo_mods_00121267, author = {Ziegler, Jürgen}, editor = {Ziegler, Jürgen and Szwillus, Gerd}, title = {Vorwort}, booktitle = {Mensch & Computer 2003: Interaktion in Bewegung; [Tagungsbeiträge der dritten Konferenz Mensch & Computer 2003 in Stuttgart]}, series = {Berichte des German Chapter of the ACM}, year = {2003}, edition = {1. Auflage}, publisher = {Teubner}, address = {Stuttgart [u.a.]}, volume = {57}, pages = {13–14}, isbn = {978-3-519-00441-7} } @inproceedings{ubo:24028, author = {Mambrey, Peter and Pankoke-Babatz, U. and Budweg, Steffen and Poschen, M. and Törpel, B.}, editor = {Herrmann, Th. and Shire, Karen and Mambrey, Peter}, chapter = {}, title = {Vernetzte Handlungsräume: Zur Ausgestaltung technisch unterstützter, verteilter Wissensarbeit.}, year = {2003}, edition = {1.Auflage}, publisher = {Westdt. Verl.}, address = {Wiesbaden}, isbn = {3-531-13880-4}, booktitle = {Wissensgenese, Wissensteilung und Wissensorganisation in der Arbeitspraxis.} } @inproceedings{ubo:14843, author = {Novak, J. and Fleischmann, M. and Strauss, W. and Wurst, M. and Morik, K. and Kunz, C. and Ziegler, J.}, editor = {Ziegler, J. and Szwillus, G.}, chapter = {}, year = {2003}, publisher = {Teubner}, booktitle = {}, title = {Verbindung heterogener Experten-Communities durch die Entdeckung, Visualisierung und Nutzbarmachung von stillem Wissen} } @inproceedings{ubo:14839, author = {Ziegler, J.}, editor = {Bullinger, H.J. and Warnecke, H.J. and Westkämper, E. and Niemann, J. and Balve, P. and Bauer, S. and Gerlach, G.}, chapter = {}, year = {2003}, publisher = {Springer}, abstract = {2., neu bearb. und erw. Aufl.}, booktitle = {}, title = {Rechnerunterstützung für kooperative Arbeit - Computer Supported Cooperative Work} } @inproceedings{ubo:14837, author = {Wissen, M. and Ziegler, J.}, editor = {Ziegler, J. and Szwillus, G.}, chapter = {}, year = {2003}, publisher = {Teubner}, booktitle = {}, title = {Ontologiebasierte Vorgehensweise zur Modellierung komponentenorientierter Web-Anwendungen} } @inproceedings{ubo:14844, author = {Wissen, M. and Ziegler, J.}, editor = {Mambrey, P. and Pipek, V. and Rohde, M.}, chapter = {}, year = {2003}, publisher = {Physica-Verlag}, booktitle = {}, title = {Methoden und Werkzeuge für kooperatives Content Engineering} } @inproceedings{ubo:14841, author = {Janssen, D. and Schlegel, T. and Wissen, M. and Ziegler, J.}, editor = {Jacko, J.A. and Stephanidis, C.}, chapter = {}, title = {MetaChart: Using creativity methods in a CSCW environment}, year = {2003}, publisher = {Erlbaum}, booktitle = {HCI International 2003, Proceedings of the 10th International Conference on Human-Computer Interaction} } @inproceedings{ubo:14836, author = {Ziegler, J. and Szwillus, G.}, chapter = {}, year = {2003}, publisher = {Teubner}, booktitle = {}, title = {Mensch Computer 2003 - Interaktion in Bewegung; Tagungsband der dritten Konferenz Mensch Computer 2003 in Stuttgart} } @inproceedings{ubo:14845, author = {Bullinger, H.J. and Ziegler, J.}, editor = {Jacko, J.A.}, chapter = {}, year = {2003}, publisher = {Erlbaum}, booktitle = {}, title = {Managing human-computer interaction and emerging issues} } @inproceedings{ubo:14835, author = {Beinhauer, W. and Ziegler, J.}, chapter = {}, title = {Intuitive interaction in complex informaiton spaces - Results and exploitation of INVITE}, year = {2003}, booktitle = {2nd International Status Conference Human-Technology Interaction (German Ministry of Education and Research)} } @inproceedings{ubo:14842, author = {Kunz, C. and Botsch, V. and Ziegler, J. and Spath, D.}, chapter = {}, title = {Contextualizing search results in networked directories}, year = {2003}, publisher = {Erlbaum}, booktitle = {HCI International 2003. Proceedings of the 10th International Conference on Human-Computer Interaction. Vol.3 : Cognitive, Social and Ergonomic Aspects} } @inproceedings{ubo:14838, author = {Wissen, M. and Ziegler, J.}, editor = {Jacko, J.A. and Stephanidis, C.}, chapter = {}, year = {2003}, publisher = {Erlbaum}, booktitle = {}, title = {A methodology for the component-based development of web applications} } @incollection{ubo_mods_00014840, author = {Ziegler, Jürgen and Szwillus, G.}, title = {Mensch Computer 2003 - Interaktion in Bewegung; Tagungsband der dritten Konferenz Mensch Computer 2003}, year = {2003}, publisher = {Teubner} } @inproceedings{ubo:27410, author = {Törpel, Bettina and Budweg, Steffen and Mambrey, Peter and Pankoke-Babatz, Uta and Poschen, Meik and Tan, Dian}, editor = {Herczeg, Michael and Prinz, Wolfgang and Oberquelle, Horst}, chapter = {}, title = {Zur Nutzung einer Kooperationsplattform: Befragung von Nutzenden des BSCW-Systeme.}, year = {2002}, publisher = {Teubner}, address = {Stuttgart, Leipzig, Wiesbaden}, isbn = {3-519-00364-3}, booktitle = {Mensch & Computer 2002 - Vom interaktiven Werkzeug zu kooperativen Arbeits- und Lernwelten.} } @inproceedings{ubo:14830, author = {Ziegler, J. and Kunz, C. and Botsch, V. and Schneeberger, J.}, chapter = {}, title = {Visualizing and exploring large networked information spaces with Matrix Browser}, year = {2002}, publisher = {IEEE Computer Society}, booktitle = {IV 02 - 6th International Conference on Information Visualisation} } @article{ubo:14829, author = {Bullinger, h.J. and Heidmann, F. and Ziegler, J.}, title = {Usability Engineering für web-basierte Applikationen}, journal = {it+ti Informationstechnik und Technische Informatik}, year = {2002}, volume = {44}, number = {1}, pages = {5–13} } @inproceedings{ubo:14834, author = {Wissen, M. and Ziegler, J.}, chapter = {}, title = {Pattern-unterstützte Modellierung von Informations- und Navigationsstrukturen im Content Engineering}, year = {2002}, booktitle = {Mensch Computer 2002 Hamburg 2.-5. Sept. 2002; Mensch Computer 2002 Hamburg 2.-5. Sept. 2002} } @article{ubo:14827, author = {Ziegler, J.}, title = {Modeling Cooperative Work Processes - A Multiple Perspectives Framework}, journal = {International Journal of Human-Computer Interaction}, year = {2002}, volume = {14}, number = {2}, pages = {139–157} } @inproceedings{ubo:14831, author = {Ziegler, J. and Kunz, C. and Botsch, V.}, chapter = {}, title = {Matrix Browser - Visualizing and exploring large networked information spaces}, year = {2002}, booktitle = {CHI 2002, ACM Conf. on Human Factors in Computing Systems, Extended Abstracts Minneapolis, USA April 20-25, 2002; CHI 2002, ACM Conf. on Human Factors in Computing Systems, Extended Abstracts Minneapolis, USA April 20-25, 2002} } @inproceedings{ubo:14832, author = {Ziegler, J. and Kunz, C. and Botsch, V.}, chapter = {}, title = {Matrix Browser - Visualisierung und Exploration vernetzter Informationsräume}, year = {2002}, publisher = {Teubner}, booktitle = {GI-Konferenz Mensch Computer 2002} } @inproceedings{ubo:14833, author = {Ziegler, J. and Kunz, C. and Botsch, V. and Schneeberger, J.}, chapter = {}, title = {Matrix Browser as a New Interactive Visualization for Large Networked Information Spaces}, year = {2002}, publisher = {ACM Press}, booktitle = {UIST 2002, ACM Conf. User Interface Software Paris, France Oct. 2002; UIST 2002, ACM Conf. User Interface Software Paris, France Oct. 2002} } @article{ubo:14828, author = {Bullinger, H.J. and Ziegler, J. and Bauer, W.}, title = {Intuitive Human-Computer Interaction - Towards a User-Friendly Information Society}, journal = {International Journal of Human-Computer Interaction}, year = {2002}, volume = {14}, number = {1}, pages = {1–23} } @inproceedings{ubo:27409, author = {Törpel, Bettina and Budweg, Steffen}, chapter = {}, title = {Creating Sharing and Using Collections of PD Procedures.}, year = {2002}, booktitle = {Proceedings of the Participatory Design Conference (PDC 2002)} } @article{ubo:14818, author = {Bullinger, H.J. and Heidmann, F. and Ziegler, J.}, title = {Usability Engineering für Web-basierte Applikationen}, journal = {it+ti - Informationstechnik und technische Informatik}, year = {2001} } @inproceedings{ubo:14822, author = {Peissner, M. and Heidmann, F. and Ziegler, J.}, editor = {Smith, M., D. Salvendy G. Harris and Koubek, R.}, chapter = {}, title = {Simulating recognition errors in speech user interface prototyping}, year = {2001}, publisher = {Lawrence Erlbaum}, booktitle = {Proceedings of the 9th Int. Conf. on Human-Computer Interaction (HCI International 2001), Vol. 1: Cognitive Engineering, Intelligent Agents and Virtual Reality New Orleans, USA Aug. 5-10, 2001; Proceedings of the 9th Int. Conf. on Human-Computer Inte} } @inproceedings{ubo:14823, author = {Rathke, C. and Wischy, M.A. and Ziegler, J.}, editor = {Smith, M., D. Salvendy G. Harris and Koubek, R.}, chapter = {}, title = {Semantic lenses: exploring large information spaces more efficiently}, year = {2001}, publisher = {Lawrence Erlbaum}, booktitle = {9th Int. Conf. on Human-Computer Interaction (HCI International 2001), Vol. 1: Cognitive Engineering, Intelligent Agents and Virtual Reality New Orleans, USA} } @inproceedings{ubo:14826, author = {Wissen, M. and Wischy, M. and Ziegler, J.}, chapter = {}, title = {Realisierung einer laserbasierten Interaktionstechnik für Projektionswände}, year = {2001}, publisher = {Teubner}, booktitle = {Tagung Mensch Computer 2001; Tagung Mensch Computer 2001} } @inproceedings{ubo:14820, author = {Ziegler, J.}, chapter = {}, title = {Intuitive human-computer interaction for a networked information world (INVITE) - Research approaches and results}, year = {2001}, booktitle = {International Status Conference Lead Projects Human-Computer Interaction Saarbrücken Oct. 26-27, 2001} } @inproceedings{ubo:14824, author = {Thies, P. and Ziegler, J.}, editor = {Smith, M. Salvendy, G.}, chapter = {}, title = {Hybrid modeling of team-oriented processes}, year = {2001}, publisher = {Lawrence Erlbaum}, booktitle = {Proceedings of the 9th Int. Conf. on Human-Computer Interaction (HCI International 2001), Vol. 2: Systems, Social and Internationalization Aspects of Human-Computer Interaction New Orleans, USA Aug. 5-10, 2001; Proceedings of the 9th Int. Conf. on Hu} } @inproceedings{ubo:14825, author = {Wissen, M. and Ziegler, J.}, editor = {Smith, M. Salvendy, G.}, chapter = {}, title = {Creativity support in system and process design}, year = {2001}, publisher = {Lawrence Erlbaum}, booktitle = {Proceedings of the 9th Int. Conf. on Human-Computer Interaction (HCI International 2001), Vol. 2: Systems, Social and Internationalization Aspects of Human-Computer Interaction New Orleans, USA Aug. 5-10, 2001; Proceedings of the 9th Int. Conf. on Hu} } @inproceedings{ubo:14819, author = {Ziegler, J.}, editor = {Stephanidis, C.}, chapter = {}, title = {Can standards and guidelines promote Universal Access?}, year = {2001}, publisher = {Lawrence Erlbaum}, booktitle = {Proceedings of the 9th Int. Conf. on Human-Computer Interaction (HCI International 2001), Vol. 3: Universal Access in HCI New Orleans, USA Aug. 5-10, 2001; Proceedings of the 9th Int. Conf. on Human-Computer Interaction (HCI International 2001), Vol.} } @inproceedings{ubo:14821, author = {Meier, D. and Tautz, C. and Traphöner, R. and Wissen, M. and Ziegler, J.}, chapter = {}, title = {Building ontologies for knowledge management applications in group sessions}, year = {2001}, booktitle = {Proceedings K-CAP 2001, First International Conference on Knowledge Capture Victoria, B.C., Canada Oct. 21-23, 2001; Proceedings K-CAP 2001, First International Conference on Knowledge Capture Victoria, B.C., Canada Oct. 21-23, 2001} } @inproceedings{ubo:14817, author = {Bullinger, H.J. and Rathke, C. and Ziegler, J.}, editor = {Reichwald, R. and Kreis, M.}, chapter = {}, title = {Entwicklungstrends im Bereich Human-Computer Interaction}, year = {2000}, publisher = {Hüthig}, booktitle = {Anwenderfreundliche Kommunikationssysteme : Referate des Kongresses Anwenderfreundliche Kommunikationssysteme vom 16. und 17. Juni 1999; Anwenderfreundliche Kommunikationssysteme : Referate des Kongresses Anwenderfreundliche Kommunikationssysteme vom} } @article{ubo:14811, author = {Killich, S. and Luczak, H. and Schlick, C. and Weissenbach, M. and Wiedenmaier, S. and Ziegler, J.}, title = {Task modelling for cooperative work}, journal = {Behaviour and Information Technology}, year = {1999}, volume = {18}, number = {5}, pages = {328–335} } @inproceedings{ubo:14813, author = {Ziegler, J.}, editor = {Bullinger, H.J. and Ziegler, J.}, chapter = {}, title = {Standards for multimedia user interfaces - opportunities and issues}, year = {1999}, publisher = {Lawrence Erlbaum Associates}, booktitle = {Human-Computer Interaction - Communication, Cooperation and Application Design, Proceedings 8th Int. Conf. on Human-Computer Interaction, Vol. 2 Munich Aug. 22-26, 1999; Human-Computer Interaction - Communication, Cooperation and Application Design,} } @inproceedings{ubo:14814, author = {Ziegler, J. and Thies, P.}, editor = {Gärtner, K.P.}, chapter = {}, title = {Modellierung kooperativer Arbeitsprozesse mit CoCharts - Konzepte und Notation}, year = {1999}, publisher = {DGLR}, booktitle = {Ergonomische Gestaltungswerkzeuge in der Fahrzeug- und Prozeßführung, 41. Fachausschußsitzung Anthropotechnik der Deutschen Gesellschaft für Luft- und Raumfahrt e.V., DGLR-Bericht 99-02 Stuttgart 19.-20. 10. 1999; Ergonomische Gestaltungswerkzeuge i} } @inproceedings{ubo:14815, author = {Bullinger, H.-J. and Ziegler, J.}, chapter = {}, title = {Human-Computer Interaction: Communication, Cooperation, and Application Design}, year = {1999}, publisher = {Lawrence Erlbaum Associates}, booktitle = {Vol. 1 of the Proceedings of the 8th International Conference on Human-Computer Interaction (HCI International ’99) Munich, Germany August 22-26, 1999; Vol. 1 of the Proceedings of the 8th International Conference on Human-Computer Interaction (HCI I} } @inproceedings{ubo:14816, author = {Bullinger, H.-J. and Ziegler, J.}, chapter = {}, title = {Human-Computer Interaction: Ergonomics and User Interfaces}, year = {1999}, publisher = {Lawrence Erlbaum Associates}, booktitle = {Vol. 1 of the Proceedings of the 8th International Conference on Human-Computer Interaction (HCI International ’99) Munich, Germany August 22-26, 1999; Vol. 1 of the Proceedings of the 8th International Conference on Human-Computer Interaction (HCI I} } @inproceedings{ubo:14810, author = {Barnekow, T. and Staab, S. and Ziegler, J., R. Studer}, editor = {Bullinger, H.J. and Ziegler, J.}, chapter = {}, title = {An architecture for recovering business events bottom-up}, year = {1999}, publisher = {Lawrence Erlbaum Associates}, booktitle = {Human-Computer Interaction - Communication, Cooperation and Application Design, Proceedings 8th Int. Conf. on Human-Computer Interaction, Vol. 2 Munich Aug. 22-26, 1999; Human-Computer Interaction - Communication, Cooperation and Application Design,} } @inproceedings{ubo:14812, author = {Ziegler, J.}, editor = {Bullinger, H.J. and Ziegler, J.}, chapter = {}, title = {A framework for modelling and designing cooperation support systems}, year = {1999}, publisher = {Lawrence Erlbaum Associates}, booktitle = {Human-Computer Interaction - Communication, Cooperation and Application Design, Proceedings 8th Int. Conf. on Human-Computer Interaction, Vol. 2 Munich Aug. 22-26, 1999; Human-Computer Interaction - Communication, Cooperation and Application Design,} } @inproceedings{ubo:14808, author = {Ziegler, J. and Hase, H. and Caloyannis, E.}, chapter = {}, title = {Prozess- und Kooperationsunterstützung in Intra- und Internet}, year = {1998}, publisher = {DLR e.V.}, booktitle = {Bonn 24.11.1998; Bonn 24.11.1998} } @inproceedings{ubo:14809, author = {Sutcliffe, A.G. and Ziegler, J. and Johnson, P.}, chapter = {}, year = {1998}, publisher = {Kluwer Academic Publishers}, booktitle = {}, title = {Designing Effective and Usable Multimedia Systems} } @article{ubo:14804, author = {Ziegler, J.}, title = {ViewNet - Konzeptionelle Gestaltung und Modellierung von Navigationsstrukturen}, journal = {Software-Ergonomie ’97Software-Ergonomie ’97 Band 49}, year = {1997}, volume = {49}, pages = {343–350} } @inproceedings{ubo:14806, author = {Ziegler, J.}, editor = {Howard, S. and Hammond, J. and Lindgaard, G.}, chapter = {}, title = {ViewNet - Conceptual design and modelling of navigation}, year = {1997}, publisher = {Chapman Hall}, booktitle = {Human-Computer Interaction (Proceedings INTERACT ’97) Sydney, Australia July 14-18, 1997; Human-Computer Interaction (Proceedings INTERACT ’97) Sydney, Australia July 14-18, 1997} } @inproceedings{ubo:14805, author = {Ziegler, J.}, editor = {Tucker, A.B.J.}, chapter = {}, year = {1997}, publisher = {CRC Press}, booktitle = {}, title = {Interactive Techniques} } @inproceedings{ubo:14807, author = {Ziegler, J. and T., B.}, chapter = {}, title = {Integrating Groupware and Workflow in a Public Administration}, year = {1997}, booktitle = {Proceedings HCI International 97 San Francisco 24-29 August 1997; Proceedings HCI International 97 San Francisco 24-29 August 1997} } @inproceedings{ubo:14801, author = {Groh, G. and Ziegler, J. and Fähnrich, K.P.}, editor = {Fähnrich, K.P. and Janssen, C. and Groh, G.}, chapter = {}, year = {1996}, publisher = {Oldenbourg}, booktitle = {}, title = {Prototyping als Vorgehenweise zur GUI-Entwicklung} } @inproceedings{ubo:14802, author = {Janssen, C. and Ziegler, J.}, editor = {Fähnrich, K.P. and Janssen, C. and Groh, G.}, chapter = {}, year = {1996}, publisher = {Oldenbourg}, booktitle = {}, title = {Objektorientierter Entwurf graphischer Benutzungsschnittstellen} } @inproceedings{ubo:14803, author = {Ziegler, J. and Janssen, C. and Weisbecker, A.}, chapter = {}, title = {Automatische Generierung graphischer Benutzungsschnittstellen}, year = {1996}, publisher = {R.Oldenbourg Verlag Müchen Wien 1996}, booktitle = {Werkzeuge zur Entwicklung graphischer Benuterschrittstellen; Werkzeuge zur Entwicklung graphischer Benuterschrittstellen} } @book{ubo:14800, author = {Ziegler, J. and Ilg, R.}, title = {Benutzergerechte Software-Gestaltung}, year = {1993}, publisher = {Oldenbourg} }