1. Institute for Integrated Radiation and Nuclear Science, Kyoto University, Kumatori, Sennan, Japan
2. SAKURA internet Research Center, SAKURA internet Inc, Kita-ku, Osaka, Japan
3. Center for Advanced Intelligence Project, RIKEN, Chuo-ku, Tokyo, Japan
4. Graduate School of Engineering, Osaka University, Suita, Osaka, Japan
5. Research Institute of Nuclear Engineering, University of Fukui, Tsuruga, Fukui, Japan