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*Ikumi Nakajima
Graduate School of Engineering, Nagaoka University of Technology
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Toshiro Kumakura
Department of Civil and Environmental Engineering, Nagaoka University of Technology
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Sento Nakai
Snow and Ice Research Center, National Research Institute for Earth Science and Disaster Prevention
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Hiroki Motoyoshi
Snow and Ice Research Center, National Research Institute for Earth Science and Disaster Prevention
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Taminoe Ishimaru
Niigata Electric Co., Ltd.