1. a Department of Mechanical Engineering, Tokyo Metropolitan University, 1-1 Minami-Ohsawa, Hachioji-shi, Tokyo 192-0397, Japan;, Email: hayashi-toshimitsu@ed.tmu.ac.jp
2. b Department of Mechanical Engineering, Tokyo Metropolitan University, 1-1 Minami-Ohsawa, Hachioji-shi, Tokyo 192-0397, Japan