Panayiotis Koutsabasis is an associate professor of Human-Computer Interaction (HCI) at the Department of Product & Systems Design Engineering, University of the Aegean, Greece. He holds a Ph.D. in Human-Computer Interaction from the University of the Aegean, M.Sc. and B.Sc. in Information Systems from the Athens University of Economics and Business. Panayiotis has been teaching HCI and several other related courses (Advanced User Interfaces, CSCW, Design for All, Mobile HCI, Interaction Design studio, etc.) for over 15 years and he has supervised over 70 diplomae and M.Sc. theses in those subjects. His research interests are wide-ranging, including HCI and design, user experience and evaluation studies of HCI, HCI and education, Natural User Interfaces (NUIs) (especially kinaesthetic and gaze interaction), Virtual Worlds and Virtual Reality, in domains of application like education, cultural heritage, cooperation, and design support. He has conducted various studies about aspects of the user experience in HCI, concerning usability, accessibility and collaborative work in interactive technologies like the web, mobile devices, and virtual worlds, with various user groups including people with special needs and older adults. He has worked as a technical coordinator and researcher in more than 20 European and national collaborative R&D projects. He has co-authored almost 70 papers in scientific journals, conferences and book chapters and 2 books on HCI (in Greek). He is member of ACM Greek SIGCHI and a tactical reviewer in a many scientific journals and conferences.