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RISS 인기검색어
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- 저자 : ( Chong Rul Park ) (검색결과 3 건)
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아이스 하키 슬랩 샷(slap shot)의 운동학적 분석
문곤성,박종률 한국운동역학회 2003 한국운동역학회지 Vol.13 No.2
Moon, G-S and Park, C-R. Kinematic analysis of Ice hockey slap shot. Korean Journal of Sport Biomechanics, Vol. 13, No. 2, pp. 13-28. The purpose of this study was to analyze the kinematic characteristics of ice hockey slap shot. The subjects of this study were four professional ice hockey players. The reflective markers were attached on the anatomical boundary line of body and the subjects were asked to perform the shot. Ariel Performance Analysis System was used to capture and digitize the shooting image, the date were analyzed by LabView 6i. The results were as follows. 1. The period of the back swing phase was 0.542±0.062sec, the down swing phase was 0.28±0.056sec and the total swing time was 0.825±0.017sec. 2The maximum linear velocity of the stick blade for x direction was shown after 7% of impact, for y, z direction were shown before 2%, 8% of impact. 3. The maximum velocity of each segment for the left arm was 2.35±0.05m/s in the upper arm, 3.56±0.34m/s in the forearm, 4.75±0.67m/s in the hand. 4. The maximum velocity of each segment for the right arm was 4.67±0.43m/s in the upper arm, 7.22±0.69m/s in the forearm, 9.42±0.89m/s in the hand. 5. The angle of left elbow was generally flexed from the ready stance to the impact and was 82.26±3.45° on the moment of impact. 6. The angle of the left shoulder was increased in the down swing phase and was 78.74±4.78° on the moment of impact. 7. The angel of the right shoulder was decreased in the down swing phase and increased before the impact. and the angle was 51.28±3.54° on the moment of impact.
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힘-시간 곡선의 중요시점에 따른 수직 점프 동작의 분석
문곤성,박종률 연세대학교 체육연구소 2002 체육연구논문집 Vol.9 No.1
본 연구는 지면 반력기의 운동역학적 변인과 영상분석의 운동학적 변인의 분석을 통하여 효율적인 수직펌프 동작을 분석하고자 하였다. 실험에 사용된 영상자료는 실내에서 조명을 통해 디지탈 6mm 비디오 카메라(GR-DVL9500, JVC, JAPAN)를 사용하여 수집하였다. 지면반력기는 Bertec사의 모델#B30201 type 4060A이었으며, data 수집은 600Hz로 하였다. 분석과정에서의 해부학적 경계점의 2차원 공간좌표를 계산하기 위해 좌표 측정대(reference frame)를 동작 수행지역에 2.00m×1.00m의 직사면체가 되도록 설치하여 촬영한 후 제거하였다. 카메라 촬영속도는 60 frames/sec로 하고 노출시간은 1/500sec로 설정하였다. 도약 국면(take off phase)에서 두 대상자의 지면 반력 곡선의 유형은 약간 다른 차이를 보였으며, 특히 하강 부하시의 시간요인은 많은 차이를 나타내었으나, landing point는 0.02s 정도의 차이로 거의 유사하였다. 이는 동작구간에 따른 시간적 변인의 차이가 존재하여도 체공시간에는 별 차이가 없었음을 보여주는 것이다. 하지 분절의 각도와 각속도는 도약 국면의 각 동작 시점에서 차이를 보였으며, 각 시점의 최대힘에 영향을 미치는 것으로 보이고 있으나, 이것이 최대 점프 높이나 체공시간에는 별다른 영향을 끼치지 못한 것으로 나타났다. The purpose of this study was analyze the vertical jump with the kinetic variable of force platform and the kinematic variable of cinematography. It's used the digital 6mm video camera(GR-DVL9500, JVC, JAPAN) for the cinematographical data and the force platform of Bertec company(B30201 type 4060A). Collecting data was 600Hz from force platform and 60 frame/sec from video camera and shutter speed was 1/500 sec. The pattern of the ground reaction force curve was a little different between two subjects. Specially, it showed significant difference on the factor of time. But, the landing point was similar between each other (0.02sec difference). So, even though there is a difference of time factor in movement phase, no difference in the flight time. The angle and angular velocity showed the difference on the movement time point of take-off phase that it seemed giving a effect on the max force, but it didn't give a effect on the max jump height and flight time.
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