1. Manufacturing Engineering Department, “Dunarea de Jos” University of Galati , Galati , Romania
2. Department of Information Engineering, University of Padova , Padova, PD , Italia
3. Mechanical Engineering Department, University of Las Palmas de Gran Canaria , Las Palmas de Gran Canaria , Spain
4. Transylvania University of Brasov, Materials Engineering and Welding Department , Brasov , Romania
5. Quality Engineering and Industrial Technologies Department, National University of Science and Technology Politehnica of Bucharest , Bucharest , Romania