1. Graduate School of Human and Environmental Studies, Kyoto University, Yoshida Nihonmatsu-cho,
Sakyo-ku, Kyoto 606-8501, Japan
2. Graduate School of Advanced Integrated Studies in Human Survivability (Shishu-Kan), Kyoto University, Nakaadachi-cho, Yoshida, Sakyo-ku, Kyoto 606-8306, Japan
3. Device Analysis Department, Nissan ARC, Ltd., 1 Natsushima-cho, Yokosuka, Kanagawa 237-0061, Japan
4. Fuel Cell Cutting-Edge Research Center Technology Research Association (FC-Cubic), 2-3-26, Aomi, Koto-ku, Tokyo 135-0064, Japan