subjectTermFull: I. MATHEMATICS AND COMPUTER SCIENCE::COMPUTER SCIENCE::INFORMATION ASSURANCE AND SECURITY::ENGINEERINGsubjectTerm: II. NATURAL SCIENCES AND AGRICULTURAL SCIENCES_or_III. ENGINEERING AND TECHNOLOGYauthor: Cheilas, Konstantinos_or_Alexopoulos, Theodoros_or_Mavridis, Ioannis_or_Pagourtzis, Aristeidis