1. Osaka Electro-Communication University; 18-8 Hatsu-machi 572-8530 Neyagawa Japan
2. Mitsui Mineral Development Engineering Co., Ltd.; 1-11-1 Osaki, Shinagawa-ku 141-0032 Tokyo Japan
3. Matsunaga Geo-survey Co., Ltd.; 1-23-1 Oi, Shinagawa-ku 140-0014 Tokyo Japan