1. Department of Mechanical Engineering, University of Hawaii at Manoa, 2540 Dole Street, Holmes 302, Honolulu, HI 96822
2. Department of Physics and Astronomy, University of Hawaii at Manoa, 2505 Correa Road, Watanabe Hall, Honolulu, HI 96822
3. Department of Mechanical Engineering Science, Tokyo Institute of Technology, 2-12-1 Ohokayama, Meguro-ku, Tokyo 152 Japan
4. Exploratory Technology Department II, Ishikawajima-Harima Heavy Industries Co., 1 Shin-Nakahara-cho, Isogo-ku, Yokohama 235 Japan
5. Mechanical Engineering Laboratory, Daikin Industrial Corporation, 1304 Kaneoka, Sakai-shi, Osaka 591 Japan