1. National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan
2. SWCC Showa Cable System Company, Ltd., Sagamihara, Japan
3. Seikei University, Musashino, Japan
4. Taiyo Nippon Sanso Corporation, Tsukuba, Japan
5. Fuji Electric Company, Ltd., Ichihara, Japan
6. Kyushu University, Fukuoka, Japan