@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: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: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_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: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}
}


@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}
}


@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)}
}


@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: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}
}


@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: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.}
}


@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: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: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)}
}