11:20 AM - 11:40 AM
○Hiroyuki MATSUMOTO1, Kagemi Uchida1, Tsutomu Sato2, Akira Sato3, Jun Aizawa4, Hiroshi Suenaga5 (1. Kushiro Coal Mine Co.,Ltd., 2. Hokkaido University, 3. Kumamoto University, 4. Hukuoka University, 5. Central Research Institute of Electric Power Industry)