datepublished: 2015author: Plageras, Panagiotis_or_Meletiou Christou, Maria Sonia_or_Rizopoulou, Sofia_or_Kroupis, Christos_or_Spyropoulos, Vasileios_or_Σπυρόπουλος, Βασίλειος__elsubjectTerm: I. MATHEMATICS AND COMPUTER SCIENCE_or_III. ENGINEERING AND TECHNOLOGYlang: el