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Hidetoshi Utsunomiya
Department of Human Wellbeing Engineering, Graduate school of Engineering, Oita University
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Kengo Ohnishi
Department of Human Wellbeing Engineering, Graduate school of Engineering, Oita University
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Hidetaka Ikeuchi
Department of Human Wellbeing Engineering, Graduate school of Engineering, Oita University
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Hiroomi Miyagawa
Department of Human Wellbeing Engineering, Graduate school of Engineering, Oita University
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Keiji Imado
Institute of Scientific Research, Oita University