subjectTerm: VI. HUMANITIES AND ARTS_or_III. ENGINEERING AND TECHNOLOGY_or_I. MATHEMATICS AND COMPUTER SCIENCE_or_II. NATURAL SCIENCES AND AGRICULTURAL SCIENCES__enauthor: Cheliotis, Dimitrios_or_Michalopoulos, Charilaos_or_Nikolopoulos, Stavros_or_Bratsos, Athanasios