type: 7_or_999author: Kalligeros, Emmanouil_or_Michalopoulos, Charilaos_or_Bratsos, Athanasios_or_Cheliotis, Dimitrios_or_Skianis, CharalampossubjectTerm: III. ENGINEERING AND TECHNOLOGY_or_VI. HUMANITIES AND ARTS_or_I. MATHEMATICS AND COMPUTER SCIENCE