3:30 PM - 3:45 PM
*Kazuhisa A. Chikita1, Hideo Oyagi2, Tomoyasu Fujii3, Kazuhiro Amita4 (1.Arctic Research Center, Hokkaido University, 2.College of Humanities and Sciences, Nihon University, 3.Nara University of Education, 4.Research Center for Enigneering Science, Akita University)