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Yutaka Hayashi
Konan Univ., Faclty of Sci. and Engng.
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Hidetoshi Nakayasu
Konan Univ., Faclty of Sci. and Engng.
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Kimihiro Yamanaka
Tokyo Metropolitan Univ. Faculty of System Design
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Tetsuya Miyoshi
Toyohashi Sozo College, Faculty of Management and Inf. Sci.