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Simulated Annealing을 이용한 3층 채널 배선
윤여삼(Y. S Yun),장직현(J H Chang) 한국정보과학회 1992 한국정보과학회 학술발표논문집 Vol.19 No.1
본 논문에서는 3층 채널 배선의 문제에 Simulated Annealing 방법을 적용하였다. 3층 채널은 HVH(Horizontal-Vertical-Horizontal) 모델을 사용하였다. 수평제약의 완화를 통하여 simulated annealing을 이용한 2층 채널 배선기를 3층 채널 배선기로 확장하였으며, 수평제약의 검사는 plane sweep방법을 사용하였고 수직제약의 검사는 그래프에서의 사이클 검사를 이용하였다. 8개의 실험결과중 7개의 경우에서 최적의 결과를 얻었다. Deutsch Difficult 문제에 대해서는 11개의 트랙을 사용하는 결과를 얻었다.
근육통 모델 쥐에서 저출력 레이저에 의한 척수후각신경세포의 활동 변화
손민균,윤여삼,이승활,강상국,김봉옥,손진훈 대한재활의학회 2005 Annals of Rehabilitation Medicine Vol.29 No.5
Objective: This study was performed to investigate the effects of low-level laser irradiation on the dorsal horn cell activities in the rats with experimental muscle pain. Method: Experimental muscle pain was induced by repeated injections of acidic saline into the gastrocnemius muscle in thirty Sprague-Dawley rats. Activities of ipsilateral dorsal horn cells were recorded with a glass microelectrode at L2-L4 spinal cord level before and after low-level laser irradiation on the injected leg. Cells were categorized as wide dynamic range (WDR) and high threshold (HT) cells by the response to the cotton, vonFrey filament, and forceps stimulation at the receptive area.Results: The spontaneous and mechanically evoked activities of WDR and HT cells were significantly increased in the muscle pain models. Low-level laser irradiation reduced mechanically evoked activities of WDR and HT cells. This effect was maximal at 20 minutes after irradiation and then returned to pre-treatment level in 40~50 minutes. Conclusion: The low-level laser irradiation was effective for the management of muscle pain by reducing activities of dorsal horn cells. Low-level laser might be clinically used for the treatment of local and referred pain of muscle origin.