1. Technical University of Dresden Institute of Power Engineering,National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute»,Department of Electronic Devices and Systems,Kyiv,Ukraine and Dresden, Germany
2. Technical University of Munich Institute for Advanced Study,National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute»,Department of Electronic Devices and Systems,Kyiv,Ukraine and Munich, Germany