subjectTerm: III. ENGINEERING AND TECHNOLOGY_or_I. MATHEMATICS AND COMPUTER SCIENCE_or_II. NATURAL SCIENCES AND AGRICULTURAL SCIENCES__enauthor: Kefalas, Petros_or_Zachos, Efstathios_or_Markou, Evripidis_or_Stamatis, Dimosthenis_or_Spyropoulos, Vasileios