Bowling 투구 動作分析

신성휴,위승두,손명성,구희성 조선대학교 스포츠과학연구소 1998 스포츠科學硏究 Vol.9 No.-

The Purpose of this study is the provide basic data for bowlers by analyzing the kinematical variables of throwing motion to the male pro bowler using 3-dimensional image analysis method. This researcher took the pictures with a video camera, analyzed them using the Kwon 3D program. 1×4×2m control object installed to get a 3 dimensional space coordinates. Results were as follows. 1. It was indicated that the trunk angle did not change left and right. Back and forth from stance to release motions of three subjects, and the average angle of trunk angle at the stance and that at the tabular side were 19.5˚ and 14.6˚ respectively, which showed they did not deviated from well-known range of forward direction, 15-20˚ and lateral direction 10-15˚. Also the trunk angle of release motion was average 17.1˚ for thalamus side, 41.3˚ for tabular side. 2. It was indicated that the knee angle repeated the increase and decrease to a small degree from the first to the fourth phase, the average angle of left knee at the release motion, the sixth phase was 110.8˚, which was higher than generally known 90˚.

Electromyography 기법을 이용한 씨름 덧걸이 기술의 상체 근 동원 비교분석

신성휴,임영태,김태완,박기자,권문석 한국운동역학회 2003 한국운동역학회지 Vol.13 No.1

Shin, S-H · Lim, Y-T · Kim, T-H · Park, K-J and Kwon, M-S. Electromyographical Analysis of Muscle Activities of Upper Trunk for Ssireum Dutguri Technique. Korean Journal of Sport Biomechanics, Vol. 13, no. 1, pp. 95-108. The purposes of this study were to analyze the muscle activities and the characteristics of muscle recruiting patterns of upper trunk for Ssirum dutguri technique using three top-ranked elite Ssirum players. The EMG technique was used to record muscle activities of both right and left sides of latissimus dorsi, biceps brachii, and erector spinae. Six surface electrodes were placed on the surface of the selected muscles and one ground electrode was also attached on the back of neck(C7). One video camera was also used to record the Ssirum motion to define 4 events and 3 phases for further analysis. The raw EMG data were filtered with band pass filter (50-400 Hz) to remove artifacts and then low pass filtered (4 Hz) to find the linear envelope which resemble muscle tension curve. This filtered EMG data were normalized to MVIC for the purpose of comparion between the subjects. The results were indicated that each subject with different physical characteristics showed very different muscle activity patterns. Although Ssirum dutguri is considered as foot technique the player grasped opponent's satba(belt) with both hands when they play. Because of this reason, activities of upper trunk muscles were relatively high. However, direct comparison between upper and lower body muscles was not possible due to the lack of the data in present study. Interestingly, all threes subjects showed that erector spinae muscle activity was comparatively higher than those of latissimus dorsi and biceps brachii. This implies to reinforce back muscle as a routine of training to improve performance or to prevent back injury. implies to reinforce back muscle as a routine of training to improve performance or to prevent back injury.

柔道技術 중 허벅다리걸기의 運動學的 特性

신성휴,손명성,김원섭,최승필 한국운동역학회 1998 한국운동역학회지 Vol.8 No.2

This study has been aimed to analyze UCHIMATE technique of Judo gymnastically. The following are the results and the proposition obtained through an image analysis method 3 men half heavy weight champions of the national Judo standing team(85-95kg) were used as subjects for the study. 1. CONCLUSION The following are the conclusion obtained through the discussion of analysis results of the Uchimata technique using 3 men, half heavy weight(85-95kg) champions of the National standing Judo team. 1) The time performing total technique were 1.48-seconds which was performinglonger than the light heavy weight class of 1.28-seconds by 0.20-seconds, this showed that the heavy weight class players demonstrated the technique later than the light heavy weight class palyers. 2) The average length of moving 1-step leg for attacking was 24.27cm, and 2-step leg moving was 92.87cm on average. Therefore, the shorter the moving distance, the more the technique performing hour could be shortened. 3) In the hanging phase, the moving displacement of the center of gravity of the body weight showed in horizontal, vertical, right and left direction 28.97cm, 21.59cm and 13.57cm respectively. Each of which were longer than the phase of KUZUSHI and TSUKURI. Such results show that the center of gravity of the body in move lift the opponent. This reducing the displacement of body weight from the center toward the right and left direction in the phase of KAKE is considered to be effective in demonstrationg the technique. 4)The central speed of the body was 0.8cm per second on average and the average vertical speed was 0.74cm per second. The speed of right and left movement was 0.51cm per second on average which showed the horizontal speed was the fastest while it is preferred that the vertical speed should be faster than that of the horizontal. 5) Angle of the Trunk showed 98.13 ˚ on average in the hanging phase and the larger the trunk angle, the shorter the needed time to demonstrate the technique, thus making the throw of the opponent over shoulder more advantageous. 2. PROPOSTION The following propositions are suggested through this analysis for further study : 1) It is to be considered that the kinetics in hanging the thigh and the degree of every segment of the body be studied in a more detailed fashion. 2) A study on the technique of thigh hanging in an actual game situation (rather than during mere exercises) is necessary. 3) It is necessary to study the TORI and UKE techniques together. 4) The study of each weight class ought to be performed.

남부산간지에서 봄과 여름 조사료 귀리의 파종과 수확 시기에 따른 조사료 품질과 생산성 변화

신성휴,이현정,구자환,박명렬,라경윤,김병주,Shin, Seonghyu,Lee, Hyunjung,Ku, Jahwan,Park, Myungryeong,Rha, Kyungyoon,Kim, Byeongju 한국작물학회 2021 한국작물학회지 Vol.66 No.2

본 연구는 조사료 연중생산이 불리한 남부산간지역(전북 장수군)에서 봄과 여름에 재배하는 조사료 귀리의 적정 파종과 수확시기를 구명하고자 하였다. 시험품종은 여름 재배용 국산 조사료 귀리 품종 '하이스피드'와 '다크호스'이었다. 남부산간지에서 봄과 여름 조사료 귀리의 적정 파종기와 수확시기를 구명하기 위하여 파종과 수확시기를 달리하여 각각 재배하고 조사료 수량과 품질 변화 양상을 분석하였다. 시험장소는 전북 장수군 소재 농가 논 포장이었다. 2015년과 2016년에 2년간 수행한 연구결과를 요약하면 다음과 같다. 1. 조사료 귀리를 2월 하순, 3월 상순과 중순에 파종하였을 때, 출수까지 적산온도가 각각 690℃, 724℃, 743℃이었고, 8월 상순, 중순, 하순에 파종하였을 때, 출수까지 적산온도는 각각 1,449℃, 1,091℃, 888℃이었다. 2. 조사료 귀리 품종(하이스피드, 다크호스)을 2월 하순부터 9일 간격으로 3월 중순까지 파종하면 출수기는 모두 5월 10일~5월 16일이었고 평균 3일 정도만 늦었고, 8월 상순부터 10일 간격으로 8월 하순까지 파종하면 출수기는 모두 10월 13일~10월 15일이었고 평균 1~2일 정도만 늦어지는 것으로 나타났다. 특히 9월 상순에 파종한 조사료 귀리는 출수하지 않았다. 3. 봄과 여름 조사료 귀리의 건물수량과 품질은 모두 파종 시기에 유의미한 영향을 받지 않았다. 4. 봄 조사료 귀리의 조단백 함량은 5월 하순에 수확한 것이 12.0%로 가장 높았고 그 이후 수확시기가 10일씩 늦을수록 급격히 감소하여 6월 상순에는 8.2%, 6월 중순에는 단백질 함량이 6.5%까지 감소하였고, TDN 함량(59~62%)도 비슷한 경향이었지만 감소폭은 작았다. 5. 여름 조사료 귀리는 파종시기가 늦을수록 단백질과 TDN 함량이 증가하는 경향이었고, 10월 하순부터 11월 중순까지 10일 간격으로 수확한 조사료 귀리의 조단백 함량이 8.4~8.7%, TDN 함량이 59.0~60.1% 정도이었다. 6. 봄 조사료 귀리는 6월 상순과 6월 중순에 수확한 건물수량이 각각 18.7톤/ha와 19.5톤/ha으로 5월 하순에 수확한 것보다 각각 83%와 91% 정도 높았다. 7. 여름 조사료 귀리는 11월 상순과 중순에 수확한 건물수량이 각각 12.5톤/ha와 12.1톤/ha으로 10월 하순에 수확한 것보다 각각 75%와 71% 정도 높았다. 8. 봄과 여름 귀리의 조사료 수량은 출수 이후 수확까지 적산온도와 높은 정의 상관관계를 나타내었다. 9. 봄과 여름 조사료 귀리의 건물수량과 품질을 고려하였을 때, 남부산간지에서 조사료 귀리를 봄에 재배할 경우에 3월 15일까지 파종하고 6월 10일경에 수확하고, 여름에 재배할 경우에는 8월 25일경까지 파종하고 11월 상순 이후 수확하면 단백질 함량이 8% 이상인 고품질 조사료의 최대 수량을 얻을 수 있는 것으로 판단되었다. Oats (Avena sativa L.) represent a good forage crop for cultivation in regions with short growing periods and/or cool weather, such as the mountainous areas of southern Korea. In this study, using the Korean elite summer oat varieties 'High speed' and 'Dark horse', we aimed to determine the optimal time to plant and harvest forage oats seeded in spring and summer in a mountainous area. Seeds were planted three times from late February and early August at 9- or 10-days intervals, respectively, and plants were harvested three times from late May to October at 10-day intervals. The experiment was carried out in an upland field (Jangsu-gun Jeonbuk) in 2015 and 2016. We investigated the changes in forage yield (FY) and quality [crude protein (CP) and total digestible nutrient (TDN) contents] based on the time of planting and harvest. Neither the forage quality nor yield of either spring and summer oats was significantly influenced by the time of planting. The CP of spring oats harvested three times at 10-day intervals from late May was 12.0%, 8.2%, and 6.5%, thereby indicating a reduction with a delay in the time of harvest. In summer oats, CP ranged from 8.4% to 8.7%, although unlike CP in spring oats, was not significantly influenced by the time of harvest. For both forage types, harvest time had no significant effect on TDN. The FY of spring oats harvested in late May and early and mid-June was 10.2, 18.7, and 19.5 ton ha^-1, respectively, with that of oats harvested on the latter two dates being significantly increased by 83% and 91%, respectively, compared with that in late May. Similarly, the FY of spring oats harvested in late October and early and mid-November was 7.1, 12.5, and 12.1 ton ha^-1, respectively, with that of oats harvested on the latter two dates being significantly increased by 75% and 71%, respectively, compared with that in late October. Taking into consideration forage yield and quality (not less than 8% CP), it would be profitable to plant spring oats in the mountainous areas of southern Korea until March 15 and harvest around June 10, whereas summer oats could be beneficially planted until August 25 and harvested from early November.

마루運動中 Standing Tucked Backward Somersault의 動作 分析

申性休 成均館大學校 1982 論文集 Vol.32 No.-

To analyse the movement of Standing Tucked Backward Somersault among the Floor Exercise in Gymnastics, I came to modle the four best gymnast of male for research, recorded the movement in the film, enlarged, and cristlized the detalis, apperaed in the film and came to the conclusion as following; 1. Take-Off Angle was appeared at the mark of 2°6″∼7°, and should make power of vertical large, having Take-Off Angle close to the vertical distance. 2. As the nore the Flight Angle was related with the distance, the greater the Flight Angle is, and the longer the removal distance of body was appeared. 3. Somersault became faster as Trunk Angle and Leg Angle were tucked more. 4. Height was revealed as 143㎝∼163㎝. The vertical distance became greater when vertical velocity was increased with by means of the dynamic take-off. 5. Though Landing Angle showed from 84°to 86°, and if the comfortable landing pose is completed in landing, the control of the Landing Angle and the training of the landing technique was necessary in the above research.

한국인 인체 중심 산출 방안 연구

신성휴 한국운동역학회 1996 한국운동역학회지 Vol.6 No.1

본 연구는 생체역학 연구 가운데 많이 사용되고, 스포츠 기술과 밀접하게 관련된 인체중심을 정확하게 산출하기 위하여 수행되었다. 즉 한국인의 인체 중심을 실측하고, 실측치와 차이를 보인 선행 연구 결과들 가운데 국내에서 많이 사용되는 외국의 결과를 보정하여 정확한 인체 중심을 구할 수 있도록 인체 분절의 질량비를 제시함으로써 생체역학 연구와 운동 기술 평가에 도움을 주고자 하는데 그 목적을 두었다. 인체 중심을 구할 때 현재 국내에서 가장 많이 사용되는 Dempster(1955), 또는 松井(1956)이 구한 인체 분절별 전신에 대한 비율을 한국인의 인체 중심에 알맞게 보정하고 타당성을 분석한 다음 제시하였다. Dempster가 제시한 방법은 한국인 남자의 인체 중심과 2.29% 차이를 보였으며, 松井이 제시한 방법은 1.54% 차이를 보였다. 이러한 차이를 인체 중심에 국한하여 정확한 값을 얻을 수 있도록 그들이 제시한 분절의 질량비를 개선하여 제시하였다.

Effect of Plant Density on Growth and Yield of Extremely Late-Planted Korean Sweet Corn Hybrids (Zea mays L.) for Fresh Market

신성휴,Jin-Seok Lee,Beom-Young Son,Jung-Tae Kim,Sang Gon Kim,Mi-Jung Kim,Sun-Lim Kim,Young-Up Kwon,Seong-Bum Baek,우미옥,Hwan Hee Bae 한국작물학회 2014 Journal of crop science and biotechnology Vol.17 No.4

Sweet corn has a short growing period of 80 to 90 days in Korea, which allows famers to grow this crop using various croppingsystems. This objective of this study was to find the optimum plant density for Korean sweet corn (se) hybrids ‘Godangok’ and‘Guseulok’ when they were grown as the second crop. Plant densities were 5,710, 6,670, and 8,000 plants 10a-1 and planting dateswere 20 July and 30 July, 2013. There was no interactive effect between plant density and hybrid for all the analyzed parameters inthis study. Increasing plant density up to 8,000 plants 10a-1 led to no significant gain in marketable ear yield. Although the total numberof ears was increased about 21 ~ 33% at the highest plant density than at lower densities, e.g., 6,670 or 5,710 plants 10a-1, the percentageof marketable ear number and individual ear weight decreased with increasing plant density. Individual ear weight of marketableears was significantly greater, e.g., by 8 ~ 13%, at 5,710 plants 10a-1 and 6,670 plants 10a-1 than at 8,000 plants 10a-1. Similarresults were obtained for ear length and width and filled length under the given plant densities, which indicated that increasing plantdensity may decrease individual ear fresh weight and ear size with good tip fill. Increasing plant density up to 8,000 plants 10a-1caused the lowest harvest index, which resulted in little gain in fresh ear yield compared to the lower plant densities of 5,710 and6,670 plants 10a-1. These results indicated that the optimum plant density for those sweet corn hybrids planted in July would bebetween 5,700 and 6,700 plants 10a-1 in terms of marketable ear yield and quality of marketable ears

가을 출하용 단옥수수 극만파재배시 파종기가 단옥수수의 생육과 수량에 미치는 영향

신성휴,정건호,김미정,이진석,손범영,김정태,배환희,김상곤,권영업,백성범 한국작물학회 2014 한국작물학회지 Vol.59 No.3

Fresh edible sweet corns demand relativelyshort period to harvest fresh ears, which can allow farmersto make a choice sweet corns for various cropping systems. For this reason, we were to find the optimum planting dateof late-planted sweet corns to sell fresh ears in the autumnlinked to cropping system with winter crops, investigatingyield and properties of marketable fresh ears and growthtraits of sweet corns (cv. 'Godangok' and cv. 'Guseulok')depending on planting dates such as 10 July, 20 July, and30 July in Suwon 2012 and 2013, respectively. The 20July-planted sweet corns showed the most fresh ear yield. However, the 10 July-planted and the 30 July-planted had32% less yield caused by consecutive rainfall from 10 Julythrough 20 July, and 15% less yield due to low air temperatureduring ripening than the 20 July-planted, respectively. The 10 and 20 July-planted sweet corns had average 140gof a fresh ear weight and 15% heavier ear than the 30July-planted. For the July-planted sweet corns, silking daysafter planting (r=-0.80**), and harvesting days after silking(r=-0.97**) and planting (r=-0.91**) were highly negativelycorrelated with daily mean air temperature during the period,resulting in it takes 1,100 growing degree days (GDD) toharvest fresh ears from the July-planted sweet corns. Thefresh ears of the 20 July-planted sweet corns are able tobe harvested by early October. Therefore it will be a goodchoice for the cropping system based on winter vegetablecash crops such as temperate garlic and onion with mediumor late maturity. Among three planting dates 20 July-plantedsweet corns had the best field performance in every yearconsidering fresh ear yield, ear size, and stability to grow

500m 숏트랙 스피드 스케이팅 출발동작의 운동학적 분석

신성휴,백진호 한국운동역학회 1996 한국운동역학회지 Vol.6 No.1

본 연구의 목적은 숏트랙 스피드 스케이팅 500m 종목의 출발 구간에 대한 운동학적 특성을 알아 보는데 있다. DLT기법을 이용한 3차원 영상분석 결과 다음과 같은 결론을 얻었다. 출발 구간의 기록이 좋을수록 첫발이지 시간이 빠른경향을 보였으며, 평균 빙면 접촉시간이 짧았다. 신체중심의 수평이동변위는 출발후 0.4초를 전후하여 급격히 증가하였으며, 기록 이 좋을수록 이러한 시간이 빠르게 나타났다. 또한 기록이 좋을수록 출발자세가 낮고, 신체중심의 수직이동변위가 최고높이에 도달하는 시간이 짧았으며, 스케이트날의 속도는 추진동작에서 가속되어 제자리동작시에 점점 감속되다가, 빙면접촉시(글라이딩)에 최저의 속도를 나타냈다. 또한 스텝거리보다는 스텝률을 이용하려는 경향을 보였다. 이상의 결과를 요약하여 보면, 빠른 첫발이지시간과 가속시간, 짧은 빙면 접촉시간, 낮은 출발자세, 빠른 스텝률, 큰 추진각등이 출발구간의 기록을 단축시킬 수 있는 운동학적 요인들로 규명되었다. 본 연구에서는 출발자세를 일정하게 통제하지 않았는데, 앞으로 출발자세에 따른 운동학적 특성 및 본 연구결과 외에 출발구간에 영향을 미칠 수 있는 요인들과 개개인의 신체적인 요건, 그리고 기술의 숙련도에 따른 동작의 제시에 관한 연구가 요구된다. The purpose of this study is to explain the kinematical characteristics of starting techniques in 500m short track speed skating. 3Dimensional video techniques were used to capture the movement of starting phase of 4 female short track speed skater who place in the world class. Based on the results of this study, the following conclusion were drawn. 1. The better the record of starting phase is the faster take off time of first foot. 2. The better the record of starting phase is the shorter average of contact time on ice surface. 3. For 0.4 second after starting, the horizontal displacement of C.O.G. has increased rapidly. 4. The better the record of starting phase is the lower ready position. 5. The velocity of skate blade accelerates n the propulsive motion, decelerates in the recovery motion and finally showes the lowest velocity during contact of ice surface. 6. The better the record of starting phase is the higher step rate.

Developpe derriere 수행시 하지 관절 모멘트 분석

신성휴,박기자,권문석 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.1

The purpose of this study was to analyze the joint moment on lower extremity using during a developpe deerriere. Data were collected by Kwon3D, KwonGRF program. Two females professional modern dancer were participated in this experiment. Subjects performed a developpe devant in meddle heights(90 deg.). On the axes of X, Y, Z, it wsa shown that the maximum joint moment was occured in hip joint. The moments are plotted during developpe devant. The ankle muscles generate a plantar flexion moment and the knee muscles generate a flexion moment and The hip muscles generate a extension moment. So these muscles of joint were kept the balance going. There is small active turn out possible a level of the leg below the hip joint. A small amount of extra turn out can be obtained when standing because of flexion between the foot and floor which can be used to give a passive external rotation force to the whole leg and this can produce a rotation between the knee and foot. This passive external rotation can produce very damaging results. So, the most important external rotator muscles shoud be trained the adductor group of muscles at hip joint, and be done stretch before performance.