Wojciech Lorenc, Wrocław University of Science and Technology, Poland Dariusz Czepiżak, Wrocław University of Science and Technology, Poland Piotr Kozioł, Wrocław University of Science and Technology, Poland Marian A. Giżejowski, Warsaw University of Technology, Poland Jakub Marcinowski, University of Zielona Gora, Poland Eugeniusz Hotała, Wrocław University of Science and Technology, Poland