Affiliation: | 1. Department of Materials Science, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, 940-2188, Japan 2. Department of System Safety, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, 940-2188, Japan 3. Department of Mechanical Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, 940-2188, Japan 4. Toshiba Corporation, Toshiba-cho, 183-8511, Japan
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