"Modelling Web Usage", Department of Archival and Library Sciences, Ionian University, Corfu, Greece, May 2006.

"Modelling user navigation on the Web with grammatical inference," Aegean University, Samos, April 2006. (powerpoint, in Greek)

"Knowledge Discovery," National Technical University of Athens,  June 2005.

"Knowledge Discovery," University of Thrace, Xanthi, January 2005.

"Knowledge Discovery," University of Patras, September 2004.

"Knowledge Discovery," Technical University of Crete, Chania, June 2004. (powerpoint_in_Greek)

"Knowledge Discovery," Institute of Informatics and Telematics, CERTH, Thessaloniki, November 2003.

"Machine Learning and Knowledge Discovery," Aegean University, Samos, May 2003. (powerpoint, in Greek)

"Information Retrieval and Information Extraction on the Web," Institute of Language and Speech Processing, December 2002. (powerpoint, in Greek)

"Knowledge Discovery from the Web," University of Patras, February 2001. (powerpoint)

"Machine Learning as an aid to the Problem of Information Overload," Athens University of Economics and Business, February 2001. (powerpoint, in Greek)

"Mining Web Data", Athens University of Economics and Business, November 2000. 

"Mining Web Data", University of Thessaloniki, November 2000.

"Personalized Information Access", University of Patras, September 2000. (powerpoint)

"Automated Information Extraction from Text", University of Patras, April 1998.