釜山市內 직장 Tinnis 선수들의 姿勢 및 기본, 전문기술에 대한 力學的인 조사 분석

徐國雄,朴順子 부산대학교 사범대학 1979 교사교육연구 Vol.6 No.2

The analysis of the amater tennis players in Busan area having the attitudes and skills in playing a game, the results are as follows. Ⅰ) Of the tennis players in Busan area, 62.55 per cent begin the tennis on thirties. Ⅱ) Their career of the tennis is considerable, Five-year-careers are 24.26% over six years 30.21%. Ⅲ) On set-up for preparation, normal set-up is 57.45 per cent. Ⅳ) When they get ready for playing, the players "flat-footed" are 63.83 per cent. Ⅴ) On set-up for preparation, the direction of foot is outside, which is abnormamly 40.85%. Ⅵ) On their groundstrokes, the 78.30% take almost eastern grip. On forehands, drive is 57.8%, on backhands slice is 79.15%. Ⅶ) On shorts, the movement of momentum is the total of 79%, polo-throw stands at 90 per cent. Ⅷ) On volleys, the players with leg-crossed 67.66%, open-stance 32.34%. The direction of body with facing the opponent represents 72.77%. It is necessary to correct this attitude. Ⅸ) On volleys, slice is the total of 49.26%, which is most frequent. Ⅹ) The 60.00% smash mostly without swing and the hitting position is over the head, which represents 49.79%. The strength is too big, which stands at 57.87% slice 41.28%, flat 58.72%. ⅩI) On serve, slice is 56.60%, and the 61.27% have the lite movement of momentum. After service, the 91.06% don't rush the net, and to commit "foot-fault" is 68.94%. XII) When the partner take an error during the doubles match, the 47.36% find fault with him.

바른 姿勢에 대한 力學的 조사 연구 : 바른 자세에 대한 역학적 조사 연구

서국웅 부산대학교 1980 論文集: 自然科學篇 Vol.29 No.-

Biolite shoes의 충격력 흡수 효능분석

徐國雄 釜山大學校 附設 體育科學硏究所 1986 體育科學硏究所 論文集 Vol.2 No.-

This experiment was to know the relationship between the kind of material and the absorbing of the impacted force. This study had some problems about the experimental method, the processing data and the experimental equipment. But, this study was considered to contribute to make running shoes and standed on force plate form. The sole material of the running shoes was used two materials. One was P.U rubber(Genard rubber) and the other was E.V.A rubber (Biolite). The impacted force of a Biolite shoes was better than the Genenal shoes.

運動量(Momentum)이동이 경기기록에 끼치는 影響에 關한 硏究 : 垂直路를 中心으로

徐國雄 서울대학교 교양과정부 1974 論文集 Vol.6 No.-

The purpose of this study was to investigate the relationship between record of atheletics and transfor of momentum. The subjects (male 95 female 16) were tested transfor of momentum. The way of test as follows (1) Stand facing a wall with both arms stretched, overhead jump as high as possible and recorded the score. (2) Perform the same jump with the use of the arms starting at a position at the side of the body. Recorded that score. The results show that transfor of momentum effects seriously on the record of atheletics and especially the height is highest coefficient of corretation among physique. In order to develop the record of atheletics, we should try to investigate transofr momentum on all kinds of physical activities.

바른 姿勢에 대한 力學的 조사 연구

徐國雄 부산대학교 1980 論文集 Vol.29 No.2

The research and analysis on postures are resulted as follows; 1) The standing posture is appeared as excellent 8.75%, normal 62.5%, poor 22.5% and bad 6.25%. 2) The seating posture is shown excellent 18.75%, normal 45.0%, poor 13.0% and bad 23.5%. 3) A result from research on walking postures is shown as excellent 3.75%, normal 16.5%, poor 62.5% and bad 17.75%. 4) Writing postures are shown as excellent 24.0%, and bad (1),(2) and (3) 70%. 5) Reading postures are shown as excellent 57.5%, normal 28.75%, poor 10.0% and bad 3.75%. 6) TV watching postures show 67.0% for viewing by sitting on a room floor, 36.5% for viewing hour for an hour, 39.5% for an hour and 30 minutes, 23.0% for watching distance 2 meters, which are the most in numbers. 7) A dynamic knowledge on correct postures are shown 93.0% on the whole in "don't know" and "know a little".

蹴球競技의 得點要因 分析硏究

徐國雄,鄭容敏 부산대학교사범대학 1984 교사교육연구 Vol.9 No.2

In order to know every factors related to the scores in soccer, he conclusion which is as follows were derived from the analysis of the score books obtained at 215 games form April, 1983 to September, 1984, middle school, high school college, the general, and international games. 1. The means of the scores were 2.25 goals per games. 2. The successive rates of the shooting made scores were 15.33%. 3. The positions of the scorers were shown as F.B.(11.57%), L.K(20.25%), F.W(68.18%). 4. The time of scores made: the times scores made were shown the similar form the beginning of the first half to the last phase of the second half and the second period (53.89%) was shown the scores more than the first period(47.11%). 5. Circumstances of the scores made: Circumstances of the scores made was shown of follows by turn; The first, centering of from the outside(24.69%), the second, Assist at the around penalty area (8.88%), the third, during confused fight before the goal area(8.06%), the fourth, dribble by oneself(8.06%), the fifth, Middle range distance shooting from outside of the penalth area(7.02%). 6.The scores made by the heading were shown 14.67% of all scores. 7. The successive rate of the score made by corner kick was 2.37% and was 6.82% of all scores.

Tennis Drive Strokes의 해부학적 역학적 요인 분석 연구 : forehond, Backhond Drive strokes를 中心으로 puting the first importance to Forehand and Backhand Drive Stork

徐國雄 부산대학교사범대학 1977 교사교육연구 Vol.4 No.2

The scientific training should be put on analyzing the anatomical and kineticmain factor exactly for the strong and exact Forehand Drive Stroke and Backhand Drive Strokes. The results of analysis for kinetic main factor are as follows: 1) The grip which can perform the Forehand Drive Stroke well is a grip near to the western, and the grip which can do the Backhand Drive Stroke well should be the back grip of the eastern. 2) the center of gravity should be broght down and the surface of base should be stable for the good Drive Stroke. 3) The kinetic friction is very important when performing the Drive Stroke as a main cause of stabilities. 4) Back swing, Forward swing and Follow throw should be performed, making good use of the principle of inertia. 5) The Drive Stroke had a stability and it makes other err in his estimate and slso makes timing, volley and smashing difficult. 6) the principle that gives impact to the object works, namely if the strong spped is needed, the rapid swing should be made when making stroke and the arm should not be placed near to the body, and the heavy racket should be carried, and the modulus of elasticiry of the vall and cut should be high and the wrist grasping the racket must be strong.

運動選手들의 全身反應時間에 關한 硏究

徐國雄 부산대학교 1983 자연과학논문집 Vol.36 No.-

This study was tested and evaluated the whole body reaction time with 165 athletes(track and field event (12), Gymnastics (12), Tae-Kwon-Do (22), Basketball (12), Judo (19), Wrestling (21), Soccer (18), Handball (14), Volleyball (12) and Rugby (23)). The test was proceeded from September 1, 1983 to September 30, 1983. The results were as follows. 1. In the total athletes, the mean of the whole body reaction time was shown as follows. 0.3212±0.0403 (forward), 0.323±0.0390 (backward), 0.3314±0.0452 (left), 0.3318±0.0377 (right), and 0.3088±0.0367 (jump) under the light stimulus. 0.3443±0.0441 (forward), 0.3461±0.442 (backward), 0.3600±0.0448 (left), 0.3562±0.0485 (right) and 0.3383±0.0472 (jump) under the tone stimulus. 2. In the total mean time of the whole body reaction between the athletes, Generally the whole body reaction time of the handball players, the Tae-Kwon-Do athletes and the Track and field athletes was faster than any other athlete under the light tone stimulus. and, The whole body reaction time of the wrestling athletes and Rugby athletes was faster than any other athlete under the light stimulus. 3. The whole body reaction time of the match game athletes was faster than that of the ball game athletes under the light stimulus. and, Toward the forward direction and at the Jump. the whole body reaction time of the ball game athletes was faster than that of the match game athletes under the tone stimulus. 4. The whole body reaction time of the Handball athletes was faster than that of Judo athletes under the light and tone stimulus. and, toward all of directions except toward the backward and left direction. The T Value between the two groups was shown a very significant difference under the light stimulus. 5. The whole body reaction time of the Tae-Kwon-Do athletes was faster than that of the soccer athletes under the light-tone stimulus. toward the backward, the right, the forward direction and at the Jump, The T value between two groups was shown a very significant difference under the light stimulus. In addition, toward the left and the right direction, the T value was shown a very significant difference under the tone stimuli. 6. In the total athletes and the ball game athletes, A little correlation was shown between the body weight and the reaction time occurred by the light and the tone stimuli. The level of the significance between two items was shown as a very significant.

師範系 體育敎育科 志望生의 一般運動能力檢査 基準値 設定에 關한 硏究

梁點紅,高基俊,黃喆文,金泰運,金重雄,白永鎬,表內淑,黃太相,徐國雄 釜山大學校 附設 體育科學硏究所 1989 體育科學硏究所 論文集 Vol.5 No.-

This study was analyzed the validity and the reliability of evaluation norm. which was used in choosing and grading events of the General Motor Ability Test. The General Motor Ability Test has been done for applicants for entrance to the department of physical education, college of education, Pusan National University. The subjects of this study were 433 applicants(men :387, women :46) for three years. They were tested in seven events : 1) 100m Dash, 2) 1500m Run(man), 800m Run (woman), 3) Throwing Hand-Ball, 4) Broad Jump, 5) Chinning(man), Flexed-Arm Hang(woman), 6) Zig-Zag Run, 7) Trunk Flexion. The results could be summerized as follows ; 1. In 100m Dash, 1500m Run, and Throwing Hand-Ball, man's average records were shown normal distribution which was inclined toward low ll grade. Therefore, the interval size of those three events must be regulated to lower. 2. Average records of Broad Jump in man were distributed into high (1) grade. So, the interval size must be adjusted to higher. 3. In Chinning, Zig-Zag Run, ad Trunk Flexion, man's average records were shawn normal distribution, and the interval size was similar to present records. 4. For woman, it was impossible to analyze correctly in all seven events because of the small number of subjects. So, it was for the sake of the reference. 5. The record of applicants for three years were operated to the variable quantity analysis. And the restults were these ; 100m Dash was F=3.0865(p<0.05), Chinning F=3.9309(p<0.05), Broad Jump F=14.7338(p<0.001), Throwing Hand-Ball F=4.9716(p<0.01), and Zig-Zag Run F=6.8297(p<0.001). Then, it was shown statistical meaningful difference in three groups. 6. In investigating the validity in choosing seven events, it was concluded that the events have been chosen reasonably. Because all events except for 100m Dash, and Zig-Zag Run in man were independent. From the analysis of the General Motor Ability Test, we could realized the necessity of regulating the standard and the interval size in several events. Then, we proposed the new evaluation norm which was suitable to present situation.

Tennis Ball의 打擊時 角度에 對한 力學的 조사연구

서국웅 부산대학교 1981 자연과학논문집 Vol.32 No.-

1. When the player want to volley in the right service area, from the point which is 2M from the net and 2.25M from the singles right base line to the intersection of the opposite left side line and service base line, the angle of his racket should be transformed at an angle of 17.5 degrees, and from the same point to the intersection of the opposite doubles side line and base line (P1), the angle of racket should be 13.5 degrees, and form the same point to the P3, the angle of racket should be changed at an angle of 20.5 degrees. 2. The speed of the rebound is influenced by the striking tool and the resilency of an object, and the momentum movement and racket quality should be considered. The moving ball which gives sufficient momentum to the racket to withstand the ball inertia is rebounded at the higher speed than the stationary ball. In case of volley, to get the high speed, it is necessary to hit the ball at high speed. 3. In case of volley, the nearer to the net the point is, the better the volley is, and body balance and stance footwork are important factors. 4. When the player strike the ball on the side line and the central service line, the change angle of the recket at the fixed distance is as follows; ·on the side line which is 3.20M from the net, the angle is 20.5 degrees. ·at the intersection of service base line (6.40M), the angle is 16.5 degrees. ·on the base line (11.89M), the angle is 12 degrees. ·on the contral service line which is 3.20M from the net, the angle is 11.5 degrees. ·on the central service line which is 6.40M from the net, the angle is 9 degrees. ·on the central service line which is 11.89M from the net, the angle is 6 degrees. 5. When the ball is passed over the net from the base line to the opposite base line, the angle of racket should be changed as follows; ·at the height of 2.0M, from the base line, the angle is 0.7 degrees. ·at the height of 2.5M from the base line, the angle is 1.5 degrees. ·at the height of 3.0M from the base line, the angle is 3.0 degrees. ·at the height of 3.5M from the bse line, the angle is 4.5 degrees. 6.In case that the ball above service base line should reach the opposite base line, the angle should be as follows: ·at the height of 2.5M, the angle is 5.5 degrees. ·at the height of 3.0M, the angle is 10.0 degrees. 7.To make the ball reach from the point of 4.29M from the net to the opposite base line, ·at the height of 2.0M, the angle is 6.5 degrees. ·at the height of 2.5M, the angle is 11.0 degrees. ·at the height of 3.0M, the angle is 15.5 degrees. ·at the height of 3.5M, the angle is 19.0 degrees. 8.To make the ball reach the point of 2.14M from the net to the opposite base line, ·at the height of 2.0M, the angle is 17.4 degrees. ·at the height of 2.5M, the angle is 24.4 degrees. ·at the height of 3.0M, the angle is 31.2 degrees. ·at the height of 3.5M, the angle is 34.7 degrees.