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일회성 유산소 운동에 따른 흰쥐 비복근 내 미토콘드리아 기능 및 구조 조절 단백질의 발현
김정하 ( J. H. Kim ),김재철 ( J. C. Kim ),박대령 ( D. R. Park ),강윤석 ( Y. S. Kang ) 한국운동생리학회(구-한국운동과학회) 2012 운동과학 Vol.21 No.2
일회성 유산소 운동(26 m/min, 10°)에 따른 운동 중(45, 90 min)과 회복기(12 h)시 흰쥐 비복근 내 Drp 1, Mfn 2, PGC-1α, p53 및 αB-crystallin 단백질의 발현을 규명하는데 연구의 목적이 있으며, 골격근 내 단백질 발현은 western blotting 방법을 통해 분석하였다. 미토콘드리아 기능 및 구조와 관련된 인자인 Drp 1, Mfn 2,PGC-1α의 발현이 적색 비복근에서 운동 45분과 회복기 12시간에서 높게 증가한 반면 백색 비복근에서는 증가하지 않는 것으로 나타났다. αB-crystallin은 적색 비복근에서 운동 45분에 증가하였고 p53의 경우 적색 비복근과 백색 비복근 모두 운동45분과 90분, 회복기 12시간에서 증가하는 것으로 나타났다. 이러한 결과는 Drp 1, Mfn 2, PGC-1α, p53, 및 αB-crystallin이 운동 중 골격근내 미토콘드리아 기능과 구조의 변화에 적응을 유도하여 미토콘드리아의 항상성 유지에 긍정적으로 작용하고 있는 것으로 사료된다. The aim of this study was to investigate the expression of Drp 1, Mfn 2, PGC-1α, p53 and αB-crystallin protein in the skeletal muscle of Sprague-Dawley rats by endurance exercise(26 m/min, 10°, 45 min, 90 min, recovery 12 h). The expression of Drp 1, Mfn 2, PGC-1α, p53 and αB-crystallin protein in skeletal muscle analyzed by western blotting. The expression of Drp 1, Mfn 2 and PGC-1α protein significantly were increased in red gastrocnemius during exercise(45 min) and recovery 12 h. The expression of B-crystallin protein significantly were increased in red gastrocnemius during exercise(45 min). The expression of p53 protein in both red and white gastrocnemius was increased in all periods. These findings suggest that Drp 1, Mfn 2, PGC-1α, p53 and αB-crystallin protein plays a role of mitochondrial homeostasis in skeletal musce by endurance exercise.
완전 정지형 방식에 의한 유도 전동기 파라미터 오토튜닝
김정하(J.H. Kim),홍찬욱(C.O. Hong),권봉현(B.H. Kwon),임계영(K.Y. Lim) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(2)
An identification method of induction motor parameters such as rotor time constant and mutual inductance at standstill condition is discussed assuming that stator resistance and leakage has already been obtained applying two different DC voltage and single phase voltage to the induction motor, respectively, This proposed scheme is Implemented by means of Model Reference Adaptive Control (MRAC) technique, which uses a rotor flux equation in voltage model as a reference model and one in current model and is demonstrated through experiment.<br/>
차량 시뮬레이터에 의한 원격 제어 무인주행 차량의 시스템 설계
최정훈(J.H.Choi),임재영(J.Y.Lim),김정하(J.H.Kim),이운성(W.S.Lee) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.11_2
The great needs of convenience about vehicles can make the research of autonomous vehicle fast. However, it is hard to apply the autonomous vehicle to real fields except for the very limited environments. In this research, we suggest the tele operation of autonomous vehicle in order to make the usages of autonomous vehicle practically for industrial fields. By using the driving simulator as the master operator, the driver can recognize the surrounding of tele operated vehicle more vividly and effectively. The CCD camera gives visual information and DGPS can offer the exact location of tele operated vehicle on the numerical map. The parameters for the vehicle operation are transmitted and received between the master and the slave operators by wireless modem. Among the varieties of applied technology to the tele operation of vehicle, the design concepts of whole systems and the kernel actuators of slave vehicle components are developed.<br/>
조준희(J.H.Cho),이운성(W.S.Lee),김정하(J.H.Kim) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.11_2
Driving simulators are used effectively for human factor study, vehicle system development and other purposes by enabling to reproduce actual driving conditions in a safe and tightly controlled environment. Interactive simulation requires appropriate sensory and stimulus cuing to the driver. Sensory and stimulus feedback can include visual, auditory, motion, and proprioceptive cues. This paper discusses simulation components and design factors considered in the driving simulator development stage, and describes a prototype driving simulator developed with these considerations in mind. The simulator consists of a real-time vehicle simulation system, a visual and audio system, a motion system, a control force loading system, and an experiment console.