인조 합성 테니스 스포츠 바닥재의 운동생리학적 분석

서혜림,박승범,서국웅,이재규,서혜진 釜山大學校 附設 體育科學硏究所 1999 體育科學硏究所 論文集 Vol.15 No.-

The purpose of this study was to investigate the changes of heart rate(HR), Ventileation, Carbon elimination, Oxygen take, Oxygen uptake per weight, Respiratory Exchange ratio and Breath frequency. To do this, we selected three Synthetic tennis playing surface(A:Synpave Rebound Ace Sample, B:Synpave Rebound Classic Sample, C:Synpave Spring Sample) by using of Austrilian Tennis Open. The result of this study is as follows 1. In the changes of heart rate(HR, beats/min), it is not significantly in a stastics. Tennis playing surface sample A was shown a little bit higher than sample C, sample C was shown a little bit higher than sample B, 2. In the changes of Ventileation(VE, 1/min), it is not significantly in a stastics. Tennis playing surface sample B was shown a little bit higher than sample A·C, sample C was shown a little bit higher than sample A, 3. In the changes of Carbon elimination (Vco2, ml/min), it is not significantly in a stastics. Tennis playing surface sample A was shown a little bit higher than sample B·C, sample B was shown a little bit higher than sample C, 4. In the changes of Oxygen take (Vo2, ml/min), it is not significantly in a stastics. Tennis playing surface sample A was shown a little bit higher than sample B·C, sample B was shown a little bit higher than sample C, 5. In the changes of Oxygen uptake per weight(Vo2/wt, ml/kg/min), it is not significantly in a stastics. Tennis playing surface sample A was shown a little bit higher than sample B·C, sample B was shown a little bit higher than sample C, 6. In the changes of Respiratory Exchange ratio(RER, Vco2/Vo2), it is not significantly in a stastics. Tennis playing surface sample A was shown a little bit higher than sample B·C, sample C was shown a little bit higher than sample B, 7. In the changes of Breath frequency (BF, fre/min), it is not significantly in a stastics. Tennis playing surface sample B was shown a little bit higher than sample A·C.

步速變化에 따른 미끄러짐의 생체역학적 연구

서국웅,윤양진,서국은,이중숙,김용재,이언석,이훈식 釜山大學校 附設 體育科學硏究所 1992 體育科學硏究所 論文集 Vol.8 No.-

The purpose of this study was to analyze walking steps to prevent unnecessary energy consuming and prevention of injury from sliding when someone was walking. The questionnaire, high speed video system, E.M.G. system, and force platform system were used to analyze sliding mechanism in biomechanical perspective. Several results were found as following: 1. According to questionnaire regarding sliding, 93.3% of participants have sliding experiences. People have sliding experiences by greasy floor(48.4%) and obstacle (22.5%). Sliding types were found from different kinds of shoes such as sneakers (48.8%) and boots (34.2%). The results were presented as following 44.6% of participants were fall down front direction and 40.3% of people fell down rear side. 2. According to the high speed video system analyzer, step sliding increased with increasing step speed from distance and acceleration speed experiment with 80 steps/min, 100 steps/min, 120 steps/min. Also, the most sliding were occurred with sneakers, boots, and bare feet as order. 3. According to E.M.G. test results, the vastus lateralis M., the vastus medialis m., and the tibialis anterior m. of electric action potential presented strongly when participants fell front, rear, and right side. The vastus lateralis m. and the tibialis anterior m. of electric action potential presented strongly when someone fell left side, but the vastus medialis m. and the gastrocnemius m. of electirc action potential presented as weaker. 4. According to the force platform test results, the most big change of floor antipower of x-axis presented when someone fell the left side. The most of big change of floor antipower of y-axis presented when someone fell down rear side. The most of big change of floor antipower of z-axis presented similarly when someone fell the front, rear, left, and right side.

임팩트시 테니스 라켓 재질의 차이에 따른 근전도 분석

윤양진,유국종,서국웅,정미라,강영택,이훈식,서국은 釜山大學校 附設 體育科學硏究所 1999 體育科學硏究所 論文集 Vol.15 No.-

The purpose of this paper is to select 7 male athletes and female athletes of high school, and to compare their active potential differences of upper arm muscles according to characteristic of a racket. the results obtained are as follows: 1. According to the accumulative distribution rate of racket material, graphite and wood material show better efficiency in case of brachio radialis muscle of male athletes, but the racket material shows no constant efficiency in brachii radialis muscle of female athletes. In case of flexor carpi radialis muscle, wood material provides better efficiency only for male athletes. In case of triceps brachii muscle, wood material gives better efficiency to males athletes and steel material gives better efficiency to females athletes. Especially in case of biceps brachii muscle, neither male nor female athletes are influenced by racket materials at impact. 2. In the muscle load rate according to racket material, wood has the highest muscle active potential and graphite has the lowest active potential. Therefore, graphite is thoght to be better in the efficiency of muscle load rate.

제10회 ASIAN GAMES의 TENNIS 운영결과분석

서국웅,이종규 釜山大學校 附設 體育科學硏究所 1987 體育科學硏究所 論文集 Vol.3 No.-

덤벨 들어내리기에서 상지에 작용하는 힘과 모멘트 산출 모델링의 개발

서국웅,김용재,조동욱 釜山大學校 附設 體育科學硏究所 1996 體育科學硏究所 論文集 Vol.12 No.-

The movement lifting up and supporting the object with arm in sports or daily life can bring about the several disease or injure to a joint, bone and muscle for great weight, as you overuse your power. Therefore it is a important study to find out the mechanical structure and principle of arm's movement. Because human's body is different from another object. It is not simple. So biomechanist make clear relation with the power and movement by modelizing each segment of body into a rigid body and by substituting direct kinetics problem for indirect kinetics problem. This study developed the kinetical modeling of right arm's segment at lifting up and down of dumbbell by using korean's data. It is useful to foresee finding out the power and moment in sports movement or daily activity of arm

영상분석 및 EMG를 통한 하중운반체계에의 동역학적 연구

서국웅,이중숙,김용재,이훈식 부산대학교 1994 자연과학논문집 Vol.58 No.-

The purpose of this study was to get the quantitative data of effect of two different load carrying system on Kinematics and Kinetics. The subjects for the reseach were 2-adults. The mechanism of each load carrying pattern was measured by a motion analylizer a forceplatform and E.M.G system. The conclusions were as follows from Kinematics Variables and Kinetics Variables. 1. Analysis of computer graphic, on the pack carrying system in walking. It was efficient in 10kg, 15kg fore-backpack carrying system in walking. But, it was not efficient on 20kg, 30kg backpack carrying in walking. Castrocnemius, Tibialis anterior, Vastus lateralis and Vastus medialis are stressed to bend their body foreward. So it occurred fatigue fastly, injuried muscles and joints. 2. Extension and flection angles of the Knee joint and the hip joint on 10kg, 15kg fore-backpack carrying system in walking showed less than those on 20kg, 30kg backpack carrying system in walking. It was efficient on the 10kg, 15kg fore-backpack carrying system in walking. 3. Magnitudes of EMG of Castrocnemius, Tibialis anterior, Vastus lateralis, Vastus medialis, were increased according to increasing weight road and were decreased on the 20kg, 30kg back-pack carrying system in walking.

3차원 분석법의 적용 : DLT 방식 DLT(Dircet Linear Transformation) Method

서국웅,윤양진,김용재,이훈식 釜山大學校 附設 體育科學硏究所 1995 體育科學硏究所 論文集 Vol.11 No.-

The purpose of this study was to maximize the application of 3-d cine-photogrammetry, in which the DLT(Direct Linear Transformation) technique is used, by searching for some practical methods of application, and to develop a comprehensive package of programs of 3-d analyses. The raw digitized coordinate date were processed by a personal computer with the developed package. Two kinds of control-point-frame(pyramid, range pole), and a synchro-timer were designed and utilized in the study. Two theodolites were used of the angle measurements of the control points. The conclusions are as follows 1. Range pole system was much superior to control point pyramid system in the applicability of the control point frame. There was no significant difference between the calculated average length using the range pole system and the actual length of the rotation rod. 2. The automatic numerical aligning technique for the digitizing apparatus reduced the RMS of residuals of the control point space coodinates. But the optional distortion was not corrected by the correction model. 3. The application of the synchro-timer which was designed and used for the study was proved. But the standard deviation of the time interval between adjacent frames was affected by the quality of the image. 4. As a result of adopting unique of calculations of the control point space coordinates, the ratio of the power of the control point reconstruction to the size of the control point frame was reduced greatly

100M 競技의 2000년대 記錄推定에 관한 硏究

徐國雄,南基喆,尹良津 부산대학교 사범대학 1991 교사교육연구 Vol.22 No.-

This study compared and analyzed the time-records between two books that is, the best new world record book issued by I.A.A.F and the track and field record book issued by A.T.F.S by using the regression and ratio-increasing method. Two books consist of the world records and the annual world records, respectively. This study aims to predict how the 2000-year world record and the annual world record would be changed. Based on the analysis, time recorded of 2000 year 100m race would be predicted as follows; 1. Men's world record was estimated to 9.68 seconds (regression method), and 9.66 seconds (ratio-increasing method). And annual world record was estimated to 9.75 seconds (regression method), and to 9.74 seconds (ratio-increasing method), respectively. 2. Women's world record was estimated to 10.34 seconds (regression method) and 10.14 seconds (ratio-increasing method). And annual world record was estimated to 10.43 seconds (regression method), and 10.11 seconds (ratio-increasing method), respectively.

효과적인 하중운반체계의 동역학적 연구

서국웅,양점홍,윤양진,황영성,이중숙,김용재,유경복 釜山大學校 附設 體育科學硏究所 1994 體育科學硏究所 論文集 Vol.10 No.-

The purpose of this study was to get the quantitative data of effect of two different load carrying system on Kinematics and Kinetics. The subjects for the research were 2-adults. The mechanism of each load carrying pattern was measured by a motion analylizer, a forceplatform and EMG system. The conclusions were get from Kinematics variables and Kinetics variables. 1. It was not effected at the vertical reaction force(Fz) of left, right foot according to the big value the 1st peack of 10kg, 15kg fore, back-pack carrying system, 20 kgw, 30 kgw back-pack carrying system in walking. But it was effected at the vertical reaction force(Fz) on 30 kgw back-pack carrying system in walking. 2. It was not effected at the Anterior-Posterior reaction force(Fx) of left, right foot according to high value of the 1st peack on 10 kgw, 15 kgw fore, back-pack carrying in walking. But, it was effected on the 20 kgw, 30 kgw only back-pack carrying in walking. 3. It was effected at the left-right reaction force(Fy) of left-right foot according to the big value of the 2nd peak on 10 kgw, 15 kgw fore-backpack carrying system in walking. It was more effective than 20 kgw, 30 kgw back-pack carrying system in walking. There was not disorder force(Fx) on 10 kgw, 15 kgw fore-backpack carrying system in walking. 4. Analysis of computer graphic, on the pack carrying system in walking. It was efficient in 10 kgw, 15 kgw fore-backpack carrying system in walking. But, it was efficient on 20 kgw, 30 kgw backpack carrying in walking. Castrocnemius, Tibialis anterior, Vastus lateralis, Vastus medialis, are stressed to bend their body foreward. So it occurred fatigue fast, injured muscles and joints. 5. Extension anyles and flection angles of the knee joint and the hip joint on 10 kgw, 15 kgw fore-backpack carrying system in walking showed less than those on 20 kgw, 30 kgw backpack carrying system in walking. It was efficient on the 10 kgw, 15 kgw fore-backpack carrying system in walking. 6. Magnitudes of EMG of Castrocnemius, Tibialis anterior, Vastus lateralis, Vastus medialis, were increased according to increasing weight road and were decreased on the 20 kgw, 30 kgw back-pack carrying system in walking.

步行 動作의 生體力學的 分析

서국웅,윤양진,이중숙 釜山大學校 附設 體育科學硏究所 1993 體育科學硏究所 論文集 Vol.9 No.-

This thesis makes use of kinematic and kinetic method to analyze walking movement with a 16 mm high speed camera, a force platform, and EMG system. The subjects for the research were 6 high school students, 2 of whom were skilled race walkers, 2 skilled runners, and 2 unskilled average students in each sex. The mechanism of walking locomotive pattern was measured by a motion analyses are as follows: 1) Too much flexing of the ankle joint can cause damage as it brings about the dispersion of power energy and forces too much burden on the ankle. 2) The analysis of the ground reaction force shows that the M-shaped curve of the vertical G.R.F. was almost the same as that of the previous studies. The skilled race walkers and runner recorded the shorter supporting time, 0.62 second, in comparison with 0.72 second recorded by average students. 3) The anteroposterior G.R.F. in walking is considered most desirable when it minimizes the breaking power at touch-down, but maximizes the driving force at take-off. 4) From EMG analysis, it is known that the activity voltage of vastus medialis is very high while walking and higher in male students than in female students. This seems to result from well-developed muscles of the male students. 5) The walker has the most correct walking locomotion when he moves his hip joint or knee joint gently with his body upright and his eyes kept ahead.