Affiliation: | 1.Faculty of Materials Science and Technology in Trnava, Slovak University of Technology in Bratislava, Jána Bottu 25, 917 24, Trnava, Slovakia ;2.Faculty of Natural Sciences, Constantine the Philosopher University in Nitra, Tr. A. Hlinku 1, 949 74, Nitra, Slovakia ;3.Institute of Electrical Engineering, Slovak Academy of Science, Dúbravska cesta 9, 841 04, Bratislava, Slovakia ; |