배드민턴선수들의 시각적 자극에 의한 훈련이 시간예측능력 및 전신반응에 미치는 영향

하철수,류홍태 한국걷기과학학회 2004 한국걷기과학학회지 Vol.2 No.-

視覺 FEED BACK의 訓鍊效果

河哲秀 尙志大學校 1988 論文集 Vol.9 No.-

This study got the following conclusions as the results of study on the training effects of visual feedback with right-handed college students (male=200, female=200). 1. The simultaneous Feedback Group showed high superiority(Deviation Area Mean=70.7cm, Description Area Mean=125.8cm) compare with the Final feedback Group (Deviation Area Mean=38.5cm, Description Area Mean=163.9cm). 2. The test performance of the Simultaneous Feedback Group showed similar resulte compare with the first, second performance of the final Feedback Group training. 3. The 10th performance effect of simultaneous Feedback showed similar results compare with the first, second pereformance effect of final Feedback. 4. The Reaction Restriction Group showed superior resulte compare with the simultaneous Feedback Group. 5. In Deviation Area, the Final Feedback Group showed very significant results with p<0.01. 6. In Description Area, the Final Feedback Group showed very significant results with p<0.01.

매트 Roundoff에서 몸펴 뒤공중돌기 動作의 力學的 分析

朴泳一,河哲秀 尙志大學校 1986 論文集 Vol.7 No.-

The purpose of this study is to analyze salto Backward stretched motion and improve the skill of it. For this study, 4 high-class male players in university were sampled at random their motions were photographed with 16mm movie camera(68 Frame/sec), and the gravitational center of the body was searched by the drawing figure method of Masseui. And then, the playing motions were divided into 7 phases and the movement of the center of gravity and the angle change of joint analyzed and compared with mechanical method. The conclusions through the above will be as follows: 1) In phase 1, examinee A,B & D take Neck J.O, but examinee C Neck J. Flex. It means a decrease of rotational power when rotating the body. 2) In phase 2, P. was diminished in examinee A,C,& D, but increased in examinee B. 3) In phase 3, F. & P. of examinee B & D were increased more than examinee A, because they made rotation easy by means of reaction. 4) In phase 4, the success or failure of stable landing posture depends upon both shoulder J., Elbow J., Hip J., and Knee J. folding one another. 5) In phase 5, F. & P. of examinee A,B & C were increased in the last motion. 6) In phase 6, the extension of Hip J. & Knee J. makes serial posture easy when taking off in the last motion. 7) In phase 7, landing posture was stable one when F. & P. Being diminished and Knee J. done with an acute angle. 8) All the above being synthesizing, the success or failure of the motion denends upon the increase or decrease of F. & P., the distance between Ho and He and the angle chane of joint of the body in Round-offmotion, the increase or decrease of F. & P. in Salto Backward stretched motion, and the size of the extension of Hip J. & Knee J. in aerial posture.

Rugby Forward 選手들의 大腿筋에 대한 筋力, 筋파워 및 筋 持久力 差異와 相關에 關한 硏究

孫在賢,고영완,河哲秀 尙志大學校 1993 論文集 Vol.14 No.-

A Study on Correlation & Difference of Muscular Strength, Muscular Power, Strength Endurance for Thigh Muscle of Rugby Forward. The purpose of this paper is to investigate differences of muscular strength, muscular power and muscular endurance of Quadriceps and Hamstring muscles by using Cybex-Ⅱ for Forward Groups(Excellency F.W group:EFG, Middle F.W: MFG). The measuring results were compared and analyzed between groups. The results were as follows: 1. Light Quadriceps, Left & Light Hamstring muscles of muscular strength of EFG has slightly higher than of MFG, and the differences are not significant, but Left Quadriceps are significant. Also. There are significant Correlation between right Quadriceps & left Hamstring muscles of EFG, ad between right Quadriceps & left Hamstring, right Quadriceps & left Hamstring, left Quadriceps & left Hamstring, right Hamstring & left Hamstring muscles of MFG(P<0.05-P<0.001). 2. Left & Right Quadriceps muscles of muscular power of EFG has slightly higher than that of MFG, but the differences are not sigificant. Also, There are significant Correlation Between left Quadriceps & left Hamstring of EFG(P>0.05), and between right Quadriceps & left Hamstring, left Quadriceps & left Hamstring, and right Hamstring & left Hamstring Muscles of MFG(P>0.05-P<0.001). 3. Left & Light Quadriceps $ Hamstring muscles of muscular endurance of EFG has slightly higher than that of MFG, but the differences are not significant. Also, There are significant correlation between light Quadriceps & left Hamstring, left Quadriceps & right Hamstring, right Hamstring & left Hamstring muscles of EFG(P0.05), but between left Hamstring & right Quadriceps muscles(P>0.05).

우주왕복선 액체로켓엔진의 밸브 고장 시뮬레이션 분석

하철수,차지형,오수헌,고상호,구자예 한국항공우주학회 2015 한국항공우주학회 학술발표회 논문집 Vol.2015 No.4

액체로켓엔진은 다양하고 복잡한 부품들로 구성되어있으므로 안정성과 신뢰성 확보가 매우 중요하다. 따라서 액체로켓의 건전성 감시 시스템은 액체로켓의 개발에서 가장 중요한 기술 중 하나가 되었으며 최근에 개발되는 액체로켓엔진의 대부분이 재사용이 가능한 로켓엔진이므로 건전성 감시 시스템이 필수적이다. 본 연구에서는 우주왕복선 주 엔진(Space Shuttle Main Engine, SSME)의 정상상태 시뮬레이션 프로그램을 이용하여 냉각계와 추진제 공급계 밸브의 고장을 가정한 고장 시뮬레이션을 수행하였으며 각 고장 상태로부터 수반되는 영향들을 정상적으로 작동하는 상태의 결과와 비교하여 분석하였다. 본 연구 결과는 다단연소 사이클 방식의 엔진을 위한 건전성 감시 시스템 개발의 기초가 될 것으로 예상된다. Health monitoring system is considered one of the most important technologies for Liquid-propellant Rocket Engine (LRE) which strongly needs to secure the safety and reliability since the engine consists of many complex components. Recently, reusable rocket engine has become a trend in the field of developing LRE, and Health monitoring system is a mandatory system especially for the reusable rocket engine. In this paper, we conducted fault simulation, using steadystate SSME simulation program on its standard Rated Propulsion Level (RPL), by assuming severe faults on valves of its components mainly regarding the parts of cooling and supplying propellants. We analyze the concomitant effect on the rocket by each fault compared with the results under the healthy condition. We expect that the research become a foundation for developing health monitoring system of Staged-Combustion Cycle-type engines.

군(軍) 전력지원체계 발전방안

하철수 대한산업공학회 2012 ie 매거진 Vol.19 No.4

트레이닝 특수화에 의한 척추만곡 상태에 미치는 영향

김영국,하철수 江原大學校附設 體育科學硏究所 1996 江原大學校附設體育科學硏究所論文集 Vol.- No.20

For a study to influence on modification of the spinal column by exercise. statistical hypothesis tests between right handed unbalance exercise group,30 baseball players, and balance exercise group,30 gymnastics players, were accomplished. P< .01 denote the probability of spinal column moidfication caused by unbalance exercise and different data will be shown in right handed baseball players between gymnastics players. 1. To the influence on lordosis, the probability of accepting is highly significant. P, the level of significance denote P< .01. It me ans lordos is was influenced by unbalance exercise. 2. To the influence on kyphosis, the result is not significant by P < .10. 3. To the influence on soliosis,result at cervical number 5 and thoracic number 3 are not significant by P< .10, but the result at lumba number 2 is highly significant by P < .001. 4. To the influence on spinal curvature, the result is not significant by p < .10. 5. To the influence on lumbar-sacral angle, the result is not significant by p <.10. 6. To the influence on sacral angle, the result is significant by p < .05. 7. To the influence on COBB analysis for lordosis and kyphosis, the result is very significant by P < .001.

우주왕복선 주엔진 작동에 대한 기초 모델링 및 해석

하철수,오수헌,차지형,고상호 한국항공우주학회 2014 한국항공우주학회 학술발표회 논문집 Vol.2014 No.11

본 논문에서는 다단 연소방식의 액체로켓엔진인 우주왕복선 주 엔진 (Space Shuttle Main Engine, SSME)의 공칭 작동점에서 기초적인 모델링을 하고 정상상태 시뮬레이션을 수행한 내용을 제시한다. 모델링은 각 구성품들에 대한 열역학 및 동역학적 특성을 이용하여, 뉴턴의 제 2 법칙과 열역학 제 1 법칙에 기반으로 크게 7 가지 분류로 나누어 구성하였다. SSME 의 순항상태 추력을 기준으로 하여 각 구성품들에 대한 모델링의 트림 조건을 구한 후 실제 운용을 통해 구해진 SSME 의 순항상태의 각 구성품별 수치들과 비교하여 공칭 작동점을 구하였으며 이를 시뮬레이션을 통해 확인하였다. This paper deals with the process of basic modeling for Space Shuttle Main Engine (SSME) which is a liquid propellant rocket engine using staged-combustion cycle, and the result of the steady-state simulation based on each nominal operating point of SSME components. Using thermodynamics and dynamics characteristics of the SSME components, the modeling was established based on Newton’s the second law and the first law of thermodynamics, and divided into 7 major categories. Based on the model, trim points of each component were obtained, and the nominal points were obtained by comparing the trim points with experimental data. We confirmed the mathematical model using numerical simulations.

육상선수들의 PSIS 규준 개발에 관한 연구

하철수,김태동 한국걷기과학학회 2004 한국걷기과학학회지 Vol.2 No.-

排球의 블로킹과 스파이크 時 수직뛰기의 變異分析

孫在賢,河哲秀 尙志大學校 1991 論文集 Vol.12 No.-

The purpose of the study was to investigate of vertical Jump variations during Volleyball Blocking and Spiking conditions comparing Volleyball and Non-Volleyball players. 60 males aged between 19 and 24 were given the three tasks which were used to verify vertical disciplacements as well as angles. It was concluded as follows. a) There was a significant difference in the vertical displacement in the spiking task between volleyball players and non-volleyball players. b) There was a significant difference in vertical displacement between jumping on the board and spiking for the volleyball players and for the non-volleyball players. c) There was a significant difference in vertical displacement between jumping on the board and blocking only for the non-volleyball players. d) There was a significant difference in the amortization phase between volleyball players and non-volleyball players when they spiked a volleyball. e) There was a significant difference in the amortization phase between volleyball players and non-volleyball players when they spiked a spiker.