Y. Miao, H. U. Hoppe, and N. Pinkwart. Situation Creator: A Pedagogical Agent Creating Learning Opportunities. Proceedings of the 13th International Conference on Artificial Intelligence in Education (AIED), IOS Press, issue 158, 2007. Y. Miao, N. Pinkwart, and H. U. Hoppe. Conducting Situated Learning in a Collaborative Virtual Environment. Proceedings of the 5th International Conference on Web Based Education (WBE), ACTA Press, 2006. Y. Miao, H. U. Hoppe, N. Pinkwart, O. Schilbach, S. Zill, and T. Schloesser. Using Agents to Create Learning Opportunities in a Collaborative Learning Environment. Proceedings of the 8th International Conference on Intelligent Tutoring Systems (ITS), Springer Verlag, issue 4053, 2006. Y. Miao, H. U. Hoppe, and N. Pinkwart. Naughty Agents Can Be Helpful: Training Drivers to Handle Dangerous Situations in Virtual Reality. Proceedings of the 6th IEEE International Conference on Advanced Learning Technologies (ICALT), IEEE Computer Society Press, 2006. A. Harrer, S. Zeini, N. Pinkwart, L. Bollen, and H. U. Hoppe. Die Nutzung elektronischer Kommunikationsmittel in webunterstützten Lehrveranstaltungen. Entwicklung von Medienkompetenz im Hochschulbereich - Perspektiven, Kompetenzen und Anwendungsbeispiele, kopaed, 2006. Y. Miao, N. Pinkwart, and H. U. Hoppe. A Collaborative Virtual Environment for Situated Learning of Car-Driving. Advanced Technology for Learning, volume 3, issue 4, 2006. N. Pinkwart, N. Malzahn, D. Westheide, and H. U. Hoppe. Community Support Based on Thematic Objects and Similarity Search. Proceedings of the Workshop on Semantic Web in E-Learning at the 12th International Conference on Artificial Intelligence in Education (AIED), University of Amsterdam, 2005. H. U. Hoppe, N. Pinkwart, M. Oelinger, S. Zeini, F. Verdejo, B. Barros, and J. I. Mayorga. Building Bridges within Learning Communities through Ontologies and "Thematic Objects". Computer Supported Collaborative Learning 2005: The Next 10 Years! Proceedings of the International Conference on Computer Supported Collaborative Learning (CSCL), Lawrence Erlbaum Associates, 2005. N. Pinkwart, M. Jansen, M. Oelinger, L. Korchounova, and H. U. Hoppe. Partial Generation of Contextualized Metadata in a Collaborative Modeling Environment. Workshop Proceedings of the 3rd International Conference on Adaptive Hypermedia (AH), Technische Universiteit Eindhoven, 2004. K. Herrmann, H. Hoppe, and N. Pinkwart. A Checking Mechanism for Visual Language Environments. Proceedings of the 11th International Conference on Artificial Intelligence in Education (AIED), IOS Press, issue 97, 2003. L. Bollen, N. Pinkwart, M. Kuhn, and H. U. Hoppe. Interaktives Präsentieren und kooperatives Modellieren. Szenarien akademischen Lehrens und Lernens in Informatik und Naturwissenschaften. Digitaler Campus. Vom Medienprojekt zum nachhaltigen Medieneinsatz in der Hochschule, Waxmann Verlag, 2003. N. Pinkwart, H. U. Hoppe, M. Milrad, and J. Perez. Educational Scenarios for cooperative use of Personal Digital Assistants. Journal of Computer Assisted Learning, volume 19, issue 3, 2003. K. Gaßner, H. U. Hoppe, A. Lingnau, and N. Pinkwart. Handlungsorientierte Kommunikationsmedien als "mind tools". Künstliche Intelligenz, volume 17, issue 2, 2003. N. Pinkwart, C. Schäfer, and H. U. Hoppe. Lightweight Extensions of Collaborative Modeling Systems for Synchronous Use on PDA's. Proceedings of the IEEE International Workshop on Wireless and Mobile Technologies in Education (WMTE), IEEE Computer Society Press, 2002. N. Pinkwart, H. U. Hoppe, L. Bollen, and E. Fuhlrott. Group-Oriented Modelling Tools with Heterogeneous Semantics. Proceedings of the 6th International Conference on Intelligent Tutoring Systems (ITS), Springer Verlag, issue 2363, 2002. H. U. Hoppe, N. Pinkwart, A. Lingnau, D. Hofmann, and M. Kuhn. Designing and Supporting Collaborative Modelling Activities in the Classroom. Information and Communication Technologies in Education Volume I: Proceedings of 3rd Hellenic Conference on ICT in Education (HICTE), KASTANIOTIS Editions, 2002. L. Bollen, H. Hoppe, M. Milrad, and N. Pinkwart. Collaborative Modelling in Group Learning Environments. Proceedings of the 20th International Conference of the System Dynamics Society (SDS), System Dynamics Society, 2002. N. Pinkwart, H. U. Hoppe, and K. Gaßner. Integration of Domain-Specific Elements into Visual Language Based Collaborative Environments. Proceedings of the 7th International Workshop on Groupware (CRIWG), IEEE Computer Society Press, 2001.