1. Microgravity Research Center, CP-165/62, Université Libre de Bruxelles (ULB), 50, Ave. F.D. Roosevelt, B-1050 Brussels, Belgium
2. Department of Mechanical Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama, Kanagawa 221-8686, Japan
3. Department of Mechanical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
4. Japan Aerospace Exploration Agency, 2-1-1 Sengen, Tsukuba, Ibaraki 305-8505, Japan
5. Mechanical and Manufacturing Department, Mondragon University, Loramendi 4, Apdo. 23, 20500 Mondragon, Spain
6. Basque Foundation for Science, Bilbao, Spain