Panagiotis Papadimitriou is a Visiting Lecturer in the Information Management Department of Technological Educational Institute (TEI) of Kavala, Greece. Panagiotis received a B.Sc. in Computer Science from University of Crete, Greece; and an M.Sc. in Information Technology from University of Nottingham, UK. He is currently a Ph.D. Candidate in Electrical and Computer Engineering in Demokritos University, Greece. His research interests include transport protocols for multimedia applications, Video and Voice over IP, congestion control, and space communications.