1. University of Applied Sciences Emden/Leer, Faculty of Maritime Sciences, Bergmannstraße 36, 26789 Leer, Germany
2. University of Balamand, Faculty of Engineering, Department of Mechanical Engineering, Koura campus,100 p.o. Box Tripoli, Lebanon
3. University of Kassel, Chair of Metal Forming Technology, Kurt-Wolters-Straße 3, 34125 Kassel, Germany