11:30 AM - 11:45 AM
*Toshimitsu Sakurai1,2, Ohno Hiroshi3, Hideaki Motoyama1, Tsutomu Uchida4 (1.National Institute of Polar Research, 2.Institute of Low Temperature Science, Hokkaido University, 3.Department of Civil and Environmental Engineering, Kitami Institute of Technology, 4.Graduate School of Engineering, Hokkaido University)