1. Advanced Mechanical and Electronic System Research Center (AMES), Faculty of Engineering, Tottori University, 4-101 Koyama-Minami, Tottori 680-8552, Japan
2. Nikkeikin Aluminium Core Technology Co., Ltd., Urbannet Uchisaiwaicho Building, 1-1-13 Shimbashi, Minato-ku, Tokyo 105-8681, Japan
3. Nippon Light Metal Co., Ltd., Urbannet Uchisaiwaicho Building, 1-1-13 Shimbashi, Minato-ku, Tokyo 105-8681, Japan
4. Nikkei Technology Center Co., Ltd., 1-11 Kitamachi, Nishiki, Kaizuka, Osaka 597-0092, Japan