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							*Takahiro Fujita
														
									Department of System Design Engineering, Graduate School of Engineering, University of Fukui
							 
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							Takeshi Nakayama
														
									Department of Human and Artificial Intelligence Systems,  Graduate School of Engineering, University of Fukui
							 
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							Masazumi Katayama
														
									Department of Human and Artificial Intelligence Systems,  Graduate School of Engineering, University of Fukui