Theodoros Tsotsos is a MSc degree student in the Department of Computer Science at the University of Ioannina since November 2003. He received his BSc degree in 2003 from the same Department. During his Bachelor thesis assignment he developed and implemented algorithms about scheduling multiple data streams in a common communication channel under the supervision of Prof. Evaggelia Pitoura. From 2002 until now, he is a member of Distributed Management Laboratory. His research interests include Distributed Systems and Peer-to-Peer Systems' design.