@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_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: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: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: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)}
}