Talks: International

  1. "BioASQ: A challenge on large-scale biomedical semantic indexing and question answering", IBM Thomas J. Watson Research Center, Yorktown Heights, New York, USA, November 2012. (powerpoint)

  2. "BioASQ: A challenge on large-scale biomedical semantic indexing and question answering", with Alexandros Artikis and Francois Portet, Tutorial at the Text Analysis Conference (TAC), National Institute of Standards and Technology (NIST), Gaithersburg, Maryland, USA, November 2012. (powerpoint)

  3. "Logic-Based Event Recognition", Xerox Research Centre Europe (XRCE), Grenoble, France, January 2012. (PDF)

  4. "Logic-Based Event Recognition", with Alexandros Artikis and Francois Portet, Tutorial at the International Joint Conference on Artificial Intelligence (IJCAI), Barcelona, July 2011. (PDF)

  5. "Logic-Based Representation, Reasoning and Machine Learning for Event Recognition", with Alexandros Artikis, Francois Portet and Anastasios Skarlatidis, Tutorial at the ACM International Conference on Distributed Event-Based Systems (DEBS), Cambridge, UK, July 2010. (PDF)

  6. "Can computers understand what is happening?", with Alexandros Artikis and Anastasios Skarlatidis, Tutorial at the Hellenic Conference in Artificial Intelligence (SETN), Athens, May 2010. (PDF)

  7. "Non-parametric Estimation of Probabilistic Topic Hierarchies", Laboratoire d'informatique de Grenoble (LIG), Universite Joseph Fourier, Grenoble, France, January 2010. (PDF)

  8. "Bootstrapping Ontology Evolution with Multimedia Information Extraction", BOEMIE Workshop, 3rd International Conference on Semantic and Didgital Media Technologies (SAMT), Koblenz, Germany, December 2008. (PDF)

  9. "Discovering and tracking user communities", with Myra Spiliopoulou and Tanja Falkowski, Tutorial at the European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML/PKDD), Warsaw, Poland, September 2007. (PDF)

  10. "Discovering user communities on the Web and beyond" , Workshop on Ubiquitous Knowledge Discovery for users (UKDU) at the European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML/PKDD), Berlin, Germany, September 2006. (PDF)

  11. "BOEMIE: Bootstrapping Ontology Maintenance with Multimedia Information Extraction" & "SHARE: Mobile Support for Rescue Forces, Integrating Multiple Modes of Interaction - Ontology Data Service", Fakultaet für Wirtschaftswissenschaft, Universitat Karlsruhe, Germany, November 2005.

  12. "On the Need for Bootstrapping Ontology Learning with Extraction Grammar Learning", International Conference on Conceptual Structures (ICCS), Kassel, Germany, July 2005.(powerpoint)

  13. "SKEL's Research on Machine Learning for Information Integration on the Web", Dagstuhl Seminar Machine Learning for the Semantic Web, Schloss Dagstuhl, International Conference and Research Center for Computer Science, Germany, February 2005. (powerpoint)

  14. "Maintaining Information Integration Ontologies," Fakultaet fuer Wirtschaftswissenschaft, Universitaet Karlsruhe, Germany, December 2003. (powerpoint)

  15. "Maintaining Information Integration Ontologies," DaimlerChrysler AG, Ulm, Germany, December 2003.

  16. "Knowledge Discovery on the Web," University of Torino, March 2003. (powerpoint)

  17. "Learning Communities of Users on the Internet", Department of Computer Science, University of Cyprus, December 1999. (powerpoint)

  18. "Refinement of Temporal Constraints in an Event Recognition System using Small Datasets," Department of Artificial Intelligence, University of Edinburgh, UK, May 1997.

  19. "Scalability of Machine Learning Algorithms," Fakultaet fuer Wirtschaftswissenschaft, Universitaet Karlsruhe, February 1994.