Dr. Ioannis (Yiannis) Kompatsiaris is a Senior Researcher (Researcher A’) with the Information Technologies Institute / Centre for Research and Technology Hellas and the Head of the Multimedia Knowledge and Social Media Analytics Laboratory. His research interests include semantic multimedia analysis, indexing and retrieval, social media and big data analysis, knowledge structures, reasoning and personalization for multimedia applications, eHealth, security and environmental 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 co-author of 90 papers in refereed journals, 38 book chapters, 8 patents and more than 320 papers in international conferences. He has been the co-organizer of various international conferences and workshops and has served as a regular reviewer for a number of journals and conferences. He is a Senior Member of IEEE and member of ACM.