type: 7_or_101_or_108_or_999_or_110subjectTerm: II. NATURAL SCIENCES AND AGRICULTURAL SCIENCES_or_III. ENGINEERING AND TECHNOLOGY_or_I. MATHEMATICS AND COMPUTER SCIENCEcollection: 3author: Stathis, Dimitrios_or_Kokolakis, Spyridon_or_Mavromatidis, Ilias