Universities University of Patras Electrical and Computer Engineering Department, Univ. Of Patras Department of Computer Engineering and Informatics Electrical and Computer Engineering Department, National Technical University of Athens Electrical and Computer Engineering Department, Aristotle Univ. of Thessaloniki Electrical and Computer Engineering Department, Univ. Of Crete Electrical and Computer Engineering Department, Univ. Of Thrace Department of Computer & Communication Engineering, Univ. of Thessaly