1. University of Twente, Faculty of Engineering Technology, Volkert van derWijk, P.O. Box 217, 7500 AE, Enschede, Netherlands
2. Atlas Copco Airpower NV,Bram Demeulenaere, Boomsesteenweg 957, B-2610, Wilrijk, Belgium
3. Laval University, Department of Mechanical Engineering, Clément Gosselin,Pavillon Adrien-Pouliot, 1065 Avenue de la médecine, Québec, Québec G1V 0A6, Canada
4. University of Twente, Faculty of Engineering Technology, Just L. Herder, P.O.Box 217, 7500 AE, Enschede, Netherlands