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민감도가 고려된 알고리듬을 이용한 최적화 방법에 관한 연구
이재관,신효철,Lee, Jae-Gwan,Sin, Hyo-Cheol 대한기계학회 2000 大韓機械學會論文集A Vol.24 No.6
A newly developed optimization method which uses the genetic algorithm combined with the sensitivity analysis is presented in this paper. The genetic algorithm is a probabilistic method, searching the optimum at several points simultaneously, requiring only the values of the object and constraint functions. It has therefore more chances to find global solution and can be applied various problems. Nevertheless, it has such shortcomings that even it approaches the optimum rapidly in the early stage, it slows down afterward and it can't consider the constraints explicitly. It is only because it can't search the local area near the current points. The traditional method, on the other hand, using sensitivity analysis is of great advantage in searching the near optimum. Thus the combination of the two techniques makes use of the individual advantages, that is, the superiority both in global searching by the genetic algorithm and in local searching by the sensitivity analysis. Application of the method to the several test functions verifies that the method suggested is very efficient and powerful to find the global solutions, and that the constraints can be considered properly.
이재관,고군석,정지윤,최윤정,서수지,Lee, Jae Gwan,Ko, Kun Seok,Jung, Ji Yun,Choi, Yun Jung,Seo, Su Ji 대한물리치료과학회 2014 대한물리치료과학회지 Vol.21 No.1
Purpose : To determined the effect of self-stretching and manual therapy on ankle joint about ROM and persisting effect. Method : Twenty participants(6 male, 14 female) ramdomly divided into self-stretching and manual therapy group. Each participant started with lunge test then self-stretching and manual therapy intervention was performed. After intervention lunge test was performed again. Last lunge test was performed after 30 minute break. Result : Result of lunge test showed both self-stretching and manual therapy group have significant difference in immediate increase of ROM and persistence effect(p<0.05). However, persistence effect of each group did not show significant difference(p>0.05). Conclusion : Manual therapy and well-designed self-stretching by therapist showed the effect in increase ROM.