oannis (Yiannis) Kompatsiaris is a Senior Researcher (Researcher B’) with the Informatics and Telematics Institute leading the Multimedia Group. His research interests include semantic multimedia analysis, indexing and retrieval, Web 2.0 content analysis, knowledge structures, reasoning and personalization for multimedia applications. He received his Ph.D. degree in 3-D model based image sequence coding from the Aristotle University of Thessaloniki in 2001. He is the coauthor of 40 papers in refereed journals, 20 book chapters, 4 patents and more than 150 papers in international conferences. He has served as a regular reviewer for a number of international journals and conferences and he has been the co-organizer of various conferences and workshops, such as the ACM CIVR, WIAMIS and SSMS. He has been the project manager and the scientific manager of the team of CERTH-ITI in more than 27 EU and National projects, since 1996. He is the coordinator of the WeKnowIt – Emerging, Collective Intelligence for personal, organisational and social use European Integrated Project. Recently, he has been appointed as Chair of the Technical Committee 14 of the International Association for Pattern Recognition (IAPR-TC14, “Signal Analysis for Machine Intelligence”). He is a Senior Member of IEEE and a member of ACM.