Institution: | 1.Department of Engineering Mechanics and Energy, University of Tsukuba, 3F bldg. room 109, 1-1-1 Tennodai, Tsukuba, 305-8573, Japan ;2.Department of Mechanical Engineering, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan ; |