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Isao Yamamoto
Department of Information & Computer Engineering, Okayama University of Science, 1-1 Ridai-cho, 700-0005 Okayama, Japan
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Kiyoshi Kuga
Department of Information & Computer Engineering, Okayama University of Science, 1-1 Ridai-cho, 700-0005 Okayama, Japan
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Tohru Okabayashi
Department of Information & Computer Engineering, Okayama University of Science, 1-1 Ridai-cho, 700-0005 Okayama, Japan
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Takashi Azakami
Department of Information & Computer Engineering, Okayama University of Science, 1-1 Ridai-cho, 700-0005 Okayama, Japan