1. Faculty of Engineering, University of Sultan Ageng Tirtayasa. Jl. Jend Sudirman km. 3 Cilegon Banten 42435 Indonesia
2. Faculty of Mechanical Engineering, Polytechnic University of Tirana, Mother Teresa No.4 1001 Tirana, Albania
3. Faculty of Material Engineering, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia