Dr. Janos Sztrik is a Professor Emeritus at the Faculty of Informatics. He received the M.Sc. degree in 1978, the Ph.D in 1980 both in probability theory and mathematical statistics from the University of Debrecen. He received the Candidate of Mathematical Sciences degree in probability theory and mathematical statistics in 1989 from the Kiev State University, Kiev, USSR, habilitation from University of Debrecen in 1999, Doctor of the Hungarian Academy of Sciences, Budapest, 2002. His research interests are in the field of production systems modelling and analysis, queueing theory, reliability theory, and computer science. He is Head of Applications of Queueing Methods in Reliability Theory and Computer Performance Research Group supported by the Hungarian National Foundation for Scientific Research. Project leader of German-Hungarian, Finnish-Hungarian, Korean-Hungarian, Austro-Hungarian, Chinese-Hungarian bilateral scientific cooperations, scientific leader of Future Internet Research, Services and Technology (FIRST) project, participiant of numerous national and international projects. Dr. Sztrik is a member ( or formal member ) of J. Bolyai Mathematical Society,Budapest, J. Neumann Computer Society, Budapest.