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우철호,이계산 한국운동역학회 2000 한국운동역학회지 Vol.9 No.2
The purpose of this study was to obtain the optional shooting of rapid fire, and to ensure the quantitative data of mechanical variable related to the rapid fire. Four national and general shooting athletes participated in this study. The shooting motions were analyzed by using 3 dimensional cinematic method, two force-platforms, and strain gauge. The conclusions obtained from the result of this study were as follows: 1. Total shooting time were 3.57s and 3.64s for the NSAs and GSAs respectively. 2. The NSAs' linear moving distance of the pistol were longer than those of the GSAs. 3. The rate of ground reaction force was 60% and 40% for the NSAs and the GSAs respectively. 4. In case of the NSAs, they shot when they respired in the 60 % of the air. But in case of the GSAs, they shot when they respired out the 50% of the air.
화상 후 흉골-턱끝 구축 환자의 마취 시 기도관리 경험 - 증례보고 -
우철호,문성하,배지영,곽인숙,김현수,김광민 대한마취통증의학회 2006 Korean Journal of Anesthesiology Vol.50 No.3
Postburn sternomental contractures (PBSMC) of the neck can cause difficulties in endotracheal intubation when the cervical hyperextension and lifting of the mandible are impaired. Ten patients with a healed burn of the neck were assessed prior to surgery using the modified Mallampati test, and by measuring the sternomental distance, interincisor gap with their mouth fully open, and using Onah's classification system for PBSMC. Difficult endotracheal intubation was predicted. The patients were intubated successfully with a fiberoptic bronchoscope. The fiberoptic bronchoscope was found to be a useful device for managing patients with PBSMC. Moreover, Onah's classification system can be used for assessing postburn contractures. (Korean J Anesthesiol 2006; 50: 322~6)
우철호 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.20 No.1
This study is research into techniques to improve Rapid Fire performance and presents quantitative data through the kinetic analysis of the following variables; the time for each phase, the movement distance of gun's muzzle and the movement of the Center of Press(C. O. P). The participating subjects were composed of two groups: An excellent group, made up of one national representative marksman and three ordinary marksmen, all with over 580 points. A standard group, made up of three ordinary marksmen and one high school marksman, all with less than 580 points. The analysis of the gun's tremble was done through three-dimension cinematograph using DLT method. The center of press of the body was analyzed using two force platforms. The analyzed result and conclusions are as follows: 1. Time The excellent group were 0.07 seconds quicker than the ordinary group. Expecially, the most important factor in four seconds series shooting was that the excellent group were 0.09 seconds quicker than the ordinary group in first shooting phase. We should particularly note that in this Rapid Fire research exercise, with in the first phase the shooter shooting as quickly as possible and in the second, third, fourth and fifth phases the shooters shooting at standardized times, the ordinary group were slower. 2. The distance of movement of the gun's muzzle The distance of movement of the gun's muzzle, was shorter for the excellent group from the second to the fifth phase. The tremble of the gun's muzzle was slight. But in the first phase the reason for the bigger distance in the movement of the gun's muzzle was right and left displacement as the shooter vertically raised his gun while taking aim. And so the distance was caused by diagonal movement, and this distance can be reduced by the elimination of left and right displacement as the shooter raises his gun. 3. The distance of the Center of Press The distance of the center of press for the excellent group appeared longer when shooting even though the excellent group averaged quicker over short time in the first phase. There was much more movement of C. O. P for the excellent group when the gun was positioned for firing and then aimed at the target in the firing phase. Generally, the tremble scale of C. O. P for the ordinary group was relatively larger. This was caused by the shooter's feet being too widely apart which caused the tremble of C. O. P. Therefore, the positioning of the feet must be carefully controlled, and the C. O. P must be located vertically at the mid- point between the feet. And so it is especially necessary to correct any wrong positioning of the feet; this was very necessary in the first phase for the excellent group, where there was a great deal of trembling