Mamoru Tanahashi
Department of Mechanical and Aerospace Engineering Tokyo Institute of Technology 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
Yuzuru Nada
Department of Mechano-Aerospace Engineering, Tokyo Institute of Technology Ookayama, Meguro-ku, Tokyo 152-8552; Faculty of Risk and Crisis Management, Chiba Institute of Science 3 Shiomi-cho, Choshi-city, Chiba 288-0025, Japan
Masanobu Fujimura
Department of Mechanical Systems Engineering, Tokyo University of Agriculture and Technology, 2-24-26 Naka-cho, Koganei-shi, Tokyo 184-8588, Japan
Toshio Miyauchi
Dept. Mechanical and Aerospace Eng., Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8552, Japan; Organization for the Strategic Coordination of Research and Intellectual Properties Meiji University 1-1-1 Higashimita, Tama-ku, Kawasaki, Kanagawa, Japan