대학 골프 선수의 Pitching wedge 스윙동작의 운동학적 특성 분석

백진호,윤동섭,김재필,Back, Jin-Ho,Yoon, Dong-Seob,Kim, Jae-Phil 한국운동역학회 2003 한국운동역학회지 Vol.13 No.3

The purposes of present study were to determine the major check-points of golf swing from the review of previous studies, and to suggest additional information on the teaching theory of golf. The golf swing motion of 6 male and female elite university golf players were filmed with 16mm Locam II high speed cameras at the speed of 200f/s, and variables such as time, displacement, angle, velocity were calculated and analyzed by 3D Cinematography using DLT method. The results were: 1. Differences were shown in the ratio of weight distribution on the feet, cocking angle, take-back velocity, club-head velocity at impact depending upon the physical characteristics and club used for swing. 2. Time for the down-swing and impact were $0.27{\sim}0.29s$ in men and $0.29{\sim}0.32s$ in women, which was 1/3 of the time for the back-swing. Women showed longer total swing time than men because of longer time in back-swing, follow-through and finish. 3. Men showed larger range of motion in shoulder and knee joints than women, on the other hand women showed larger range of motion in hip joint than men. 4. Cocking motion and right elbow flexion were occurred at the top of back-swing and cocking release was occurred at the moment of impact. Maximum rotations of shoulder and hip joints were found between the top of back-swing and down-swing phase. 5. Women showed lower back-swing velocity than men, and men showed higher club velocity(men: $38.2{\sim}38.6m/s$, women: $35.1{\sim}36.4m/s$) than women.

인체 무게 중심 분할에 따른 500m 숏트트랙 스피드 스케이팅 출발 기술 분석

백진호,정남주,한기훈,이용구,윤동섭,이용식,Back, Jin-Ho,Chung, Nam-Ju,Han, Ki-Hoon,Lee, Yong-Goo,Yoon, Dong-Seob,Lee, Yong-Sik 한국운동역학회 2003 한국운동역학회지 Vol.13 No.3

The purpose of this study was to attempt new starting motion and supply present starting motion in the 500M short track speed skating according to the center of gravity position. The center of gravity position ratio was divided starting motion into five(type A : front 80%-back 20%, type B front 70%-back 30%, type C : front 50%-back 50%, type D : front 30%-back 70%, type E : front 20%-back 80%). The three dimension motion analysis with DLT(direct linear transformation) method was executed using two video cameras. The following conclusion was that It was appear that reaction and execution time in starting motion was the most short in type B. It was characteristic that step of skaters was shorten and center of gravity position ratio was not effect to change of the step in each event. It was appear that the displacement of type D and type E were longer than that type A and type B during the starting motion. It was appear that skill types of center of gravity position ratio to the front were lower than that to the back and contract a posture. Observing the above, it was conclusion that skill type B of center of gravity position ratio to the tent was more effect than that to the back. But it is important that these skill type was most used to the competition and estimate the result.

여자 500m 쇼트트랙 스피드 스케이팅의 스타트 기술분석

백진호,곽창수,정남주 한국운동역학회 2004 한국운동역학회지 Vol.14 No.3

J. H. BACK, C. S. KWAK, N. J. CHUNG. Analysis of the Female 500m Sprint Starting Motion in Short Track Speed Skating. Korean Journal of Sport Biomechanics, Vol. 14, No. 3, pp. 285-299, 2004. The purpose of this study is to identify female 500m sprint start motion by the center of gravity position in short track speed skating. The center of gravity position ratio was divided into three type(type A front : 80%-back : 20%, type B front : 70%-back : 30%, type C front: 50%-back : 50%). Three video cameras were used for 3D motion analysis with DLT method and the results were as follows: The elapsed time in starting motion was appeared that type B was the shortest and type A was the longest. It was appear that the stroke length of type A was longer than that type B and C during starting phase. This result was similar to displacement of center of gravity. It was appeared that skill type of center of gravity position ratio type B' ankle and knee joint angle were lower than that of type A and C. Observing these results it was conclusion that skill type B of center of gravity position ratio was more faster than that of type A and C. But it is important that these skill type needed to verifying more subjects.

국가대표 접영선수의 방향전환 동작 평가

백진호,이순호,문영진 한국운동역학회 2004 한국운동역학회지 Vol.14 No.1

J. H. Back, S. H. LEE, Y. J. Moon. The kinematical Evaluation of Natural Team's Butterfly Turn motion. Korean Journal of Sport Biomechanics, Vol. 14, No. 1, pp. 117-131, 2004. The foreign superior players and national team players' turning phase was measured, compared and analyzed to help the representative players improve the skill of turn. The underwater video camera used to analyze and evaluate the representative players' skill of turn in detail and the result is as follows. 1. The record for the phase of turn was similar to the rank of the last record. The improvement of the skill of turn was required because Korean players' record was lower than the foreign players' one. In case of 200m events the 1st turn was the fastest and it took more time as the turn is repeated. 2. It shows that the preparation phase and turning motion cause the difference between the players and within one player. 3. The horizontal movement of center of gravity moves to turning point slowly in the preparation phase, does not move nearly in the turning phase and increase again in the propulsion phase. Good record has short time for turn phase. The result means that the shorten the turning phase is the most important factor. Therefore the preparation for this is required. The vertical movement is maintained or increase a little and then move to from the turning phase. 4. The characteristic of horizontal velocity in center of gravity is that there is any big changes at the preparation phase, the faster velocity is found from the better record and the accelerating time is fast at the propulsion phasen. The wrong motion is made by not using the swimming velocity for turning and waiting and more time is required by this. 5. The angle of knee when the player touch the turning point is 106.22435.56 and the maximum angle of knee during the driving after the touch of tuning point is full extension. The size of maximum angle of knee did not match with the required time of propulsion phase. It seems that the individual difference is big when the players touch the turning point the angle of knee and the research for the individual angle which can reveal the maximum power should be carried out. The national team player's skill for the turn is behind the foreign players' one and a lot of problems were found. It shows that the players could not practice the skill for turn during the training. The 1st reason for it is the various facilities like underwater window or analyzing equipment like underwater camera with which the coaches can teach and correct the players' detailed skill. It is need to evaluate the players' detailed skill exactly and correct it by objective data to complete the good skill in the future. In this regard, the investment for the facility is necessary.

디지털 영상인식 방법을 통한 자세평가 및 운동가동범위 측정시스템 개발

문영진,이순호,백진호,이종각,이건범 한국운동역학회 2004 한국운동역학회지 Vol.14 No.3

Y. J. MOON, S. H. LEE, J. H. BACK, J. K, LEE, K. B. LEE. The development of posture evaluation and Range of Motion(ROM) system by using digital vision analysis method. Korean Journal of Sport Biomechanics, Vol. 14, No. 3, pp. 49-65, 2004. The purpose of this study is development of posture evaluation and Range of Motion(ROM) system by using digital vision analysis method. The results of this study are as follows. First, Scoliosis evaluation through this research measurement system represent 3mm error in 7 cervical point and deepest lumbar point, 0.7mm error in other point. This mean this research measurement system have a reliability for scoliosis evaluation. Second, for spine line evaluation on high fat subject, we need reconstrection spine line after mesurement for fat thickness in 7 cervical point and deepest lumbar point. Third, In pedioscope error test, it present 0.01848cm in X axis and 0.01757cm in Y axis. This results mean pedioscope have a reliability foot evaluation. Forth, Posture evaluation and Range of Motion measurement system by using digital vision analysis method can fast measure in range of motion and foot evaluation and posture. therefore we can expect this system application in young people posture clinic center and hospital and so on.

철봉운동 Deff 동작의 운동학적 분석

백진호 한국운동역학회 2006 한국운동역학회지 Vol.16 No.1

記紀歌謠와 高麗歌謠에 있어서 歌垣의 硏究

白珍豪 서강정보대학 1992 論文集 Vol.11 No.-

稻作文化을 中心으로한 韓日古代社會에서는 春의 播種期 혹은 秋의 結實期에 가장 중요한 行事로서, 祭儀가 행하여 지는 것이다. 古代人은 穀物의 種이 성장하여 열매를 맺는 것을 신비스러운 것으로 생각하였던 것이다. 즉, 耕作에 先行하여 행하여진 祭儀는 農作物의 豊穰 預祝하고, 實現할려고 하는 呪的인 願望의 表現機會로서 행하여진 것이기 때문에, 그 行事의 內面에는 豊穰呪術의 原理가 內在되어 있는 것이다. 또, 古代人은 人間生活과 植物의 成長을 類似한것 처럼 생각하고, 人間이 類感的으로 植物의 成長과 結實에 影響을 준다고 믿게 되었던 것이다. 즉, 그들의 內面意識에는 男女의 性的結合에 의해서 自然의 生命力이 보다 活性化되고, 生産力이 促進된다고 하는 Frazer의 共感呪衛의 原理가 內在되어 있다고 말할수가 있는 것이다. 즉, 農耕과 人間의 性은 類感的關係에 있다고 생각하고, 自然에서의 豊穰은 人間의 性的關係 혹은 多産과 直接的으로 關係가 있다고 믿었던 것이다. 이와같은 豊穰呪術 原始的風流의 表現社會로서 日本의 歌垣와 韓國의 國中社會가 行하여진 것이다. 歌垣와 國中社會는 飮酒 ·歌舞·男女群聚相戱 즉 性的解放을 그 內容으로 하는 것에서 共通点을 찾을수가 있는 것이다. 또, 豊穰呪術의 原義를 기반으로 해서 行하여진 歌垣와 國中社會는 原始藝術의 表現社會로서 活用된 것이다. 또 그 藝術活動에 의해서 集團的인 歌謠가 發生한 것이다. 요컨데, 그 藝術活動의 場이 歌垣와 國中社會인 것이다. 따라서, 歌垣와 國中社會에는 原始人의 藝術活動의 斷面이 內在되어 있는 것을 고찰할 수 있는 것이다. 이와같은, 古代歌謠의 歌垣的詩想은 『記紀歌謠』와 『高麗歌謠』의 歌에서도 內在되어 있는 것을 考察할 수 있는 것이다.

철봉 어깨 틀어 휘돌며 다리 모아 엔도(Endo) 동작의 운동학적 분석

한윤수,백진호,이용식 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.2

This study was attempted to kinematical characteristics of the Endo El-grip Swing on the horizontal bar. At 2002 Busan Asian Games, three endo piked in el-grip swing were filmed using two video cameras during men's team competition. The three dimensional motion analysis with DLT method was executed using two video cameras of analyzing the actual competition situation. It was summarized that (a) It was indicated large hip and shoulder angle at E1, small hip angle and large sholder angle from E1 to E2, the smallest hip angle at E3, flexional hip and shoulder angle from E3 to E4, large hip and shoulder angle at E5; (b) It was indicated large angular velocity of hip at E3, large angular velocity of trunk rotation from E2 to E4, small angular velocity of shoulder and trunk rotion.

Analysis of the Female 500m Sprint Starting Motion in Short Track Speed Skating

( Jin Ho Back ),( Chang Soo Kwak ),( Nam Ju Chung ) 한국운동역학회 2005 한국운동역학회 논문 영문초록집 Vol.2005 No.-

The Kinematical Evaluation of National Team`s Butterfly Turn Motion

( Jin Ho Back ),( Soon Ho Lee ),( Young Jin Moon ) 한국운동역학회 2005 한국운동역학회 논문 영문초록집 Vol.2005 No.-