1. a Faculty of Engineering, University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113, Japan
2. b Faculty of Engineering, University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113, Japan
3. c Daikin Industries Ltd. 1304, Kanaoka-cho, Sakai-shi, Osaka, 591, Japan