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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.
C(sI-A)<sup>-1</sup>B가 최소위상이 될 LMI 조건을 이용한 해석과 설계
이재관,최한호,Lee Jae-Kwan,Choi Han Ho 제어로봇시스템학회 2005 제어·로봇·시스템학회 논문지 Vol.11 No.11
We derive a linear matrix inequality(LMI) condition guaranteeing that any invariant zeros of a triple (A, B, C) lie in the open left half plane of the complex plane, i.e. $C(sI-A)^{-1}B$ is minimum phase. The LMI condition is equivalent to a certain constrained Lyapunov matrix equation which can be found in many results relating to stability analysis or control design. We show that the LMI condition can be used to simplify various control engineering problems such as a dynamic output feedback control problem, a variable structure static output feedback control problem, and a nonlinear system observer design problem. Finally, we give some numerical examples.