골프스윙시 體重移動 樣狀에 관한 연구

鄭樂喜 한국체육대학교 부속 체육연구소 1992 체육연구소논문집 Vol.10 No.-

The purpose of the study was to analyze the various parameters related to body weight shift and changes of center of gravity during golf swing motions by using A.M.T.I. Force platform. The Two Subjects were employed for the study. The results of the study were as follows: 1. Changes of Center of gravity in X.Y direction, which two subjects were demonstrating, were Similar, But the specific gravity of one subject and body weight tend to be moved forward, while that of the other's moved backward, which caused his trunk's circle to be wider. 2. Just before their backswing motions, they had a consistent tendency that their centers of gravity were moved slightly toward Y direction. It was shown that at the power of the impact, which means that the head of the golf club just meets the golf ball, depended on the magnitude of their backswing motions, but the bigger the their backswing, the unstabler their impact postures, reversely, the less their backswing, the stabler their impact postures. 3. The changing patters of shock power in their impacts were similar in Z direction, but the power of subjeot B in X,Y direction was much greater than that of subject A. Such a difference between subject A and B in X,Y was in proportion to the forward and backward movements of their body weights. 4. The shock power related to changing pattern of power was greatest in Z direction, the second followthrough face showed the second power, and the first follow through the third. The shock power related to changing pattern of power in Y direction was increased in toward the negative direction(-) just before backswing motion and increased in toward the positive direction in the last period of backswing motion.

축구 선수의 족관절 불안정증(unstable ankle) 분석

정낙희 ( Nak Hee Jung ),이한경 ( Han Kyung Lee ),육조영 ( Jo Young Yuk ) 한국스포츠리서치 2007 한국 스포츠 리서치 Vol.18 No.4

Unstable ankle is a serious problem for sports players. Some research has been done with respect to Judo and volleyball players (Banister, E.W., & Allen, M.E., 2002), and this analysis will do more deep research about this matter of soccer player through the comparison with the result of Judo player. The target population of the research is 80 college soccer players residing in Seoul and Kyunggi province for conducting survey, and additionally we have done direct examination, stress x-ray test on 30 players who were playing games. If a player continues to play soccer with the continued symptoms of unstable ankle, he is not only putting his career at risk, but his everyday living may also be affected. Therefore, it is crucial that the players and the coach recognize the problem and receive adequate treatment. Following conclusions have been drawn from the research. 1. According to the definition of unstable ankle, 15 players (50%) showed the symptom and it had correlation with subjective symptoms. 2. As a result of the comparison with other sports, Judo indicates 57% and volleyball indicates 72%, so volleyball showed the highest rate. 3. Sufficient recognition and establishment of treatment for unstable ankle are needed.

우수운동선수 選拔·訓練·評價를 위한 電算프로그램開發

鄭樂喜,姜相兆 韓國體育大學校附屬 體育科學硏究所 1984 韓國體育大學校附屬 體育科學硏究所論文集 Vol.3 No.1

DCT ( Discrete Cosine Transform ) 를 기초로 한 전자 홀로그래픽 3차원 영상 데이터의 압축에 관한 연구 ( Compression of Electro-Holographic 3-D Image Date Based on Discrete Cosine Transform )

윤석준,임재우,정낙희,전호인 한국통신학회 1996 한국통신학회 학술대회논문집 Vol.15 No.1

一部小都市地域의女子初·中高校生의 成長發育 과 體格指數에 關한硏究

朴淳永,朴喆斌,鄭樂喜,崔龍魚,金振浩 韓國體育大學校 1983 論文集 Vol.5 No.-

The study is based on the simple random sampling of 2,517 elementary, middle, and high school girl students in area of Gunsan-city, Jeon-nam provence. The measurement of physical growth and development was conducted from May 1 to May 30 in 1982. Results of this study were as follows ; 1. Physical growth and development 1) Rapid growth of physical growth height in terms of body height, body weight, chest-girth and sitting height has been observed among 14 year-old girls. Growth in terms of physical growth and development turned out to slower among students of higher ages. 2) In the physical growth and development, some increasing was appeared from 6 years old to 18 years-old (hight, body weight, chestgirth, stting height) 3) The maximum annual growth rates were as follows; Body height: 7.38cm during the age 9-10 years old, Body weight: 4.36kg during the age 13-14 years old, Chest-girth: 5.70cm during the age 13-14 years old, Sitting height: 3.19cm during the age 13-14 years old, 4) The standards of growth in rescent Korean students were shown much improving than that of 1967. 2. Various indices about physical growth and development 1) The lineal increase of relative body weight was shown in belonging to the age 6-18. 2) As for relative chest girth, it is small in the age of 13, but when they are 14, it becomes normal. 3) The average relative sitting height was shown to be constant nearly to the same degree of 53-55. 4) Rohrer index was 1.2-1.3 5) The kaup index was lower than 2.0 under 14 years of age. It becomes higher than 2.0 after they reach in age of 15. 6) Vervaeck index was 65-85. 7) Pelidisi index of the nutritional status was obtained 89-95.65 for girls.

洋弓競技의 競技力 決定要因 分析

姜相兆,尹喜重,鄭樂喜,金奎完 韓國體育大學校附屬 體育科學硏究所 1984 韓國體育大學校附屬 體育科學硏究所論文集 Vol.3 No.1

The purpose of the study was to investigate the effects of different stances, cardiac cycles, breathing patterns, and body sway on performance in archery. It was hypothesized that subjects demonstrate different performances in archery relative to different stances, distances, cardiac cycles, breading patterns, and the body sway while in release position. 10 varsity caliber archery were randomly selected from archer groups of Korean National College of Physical Education and National representatives. The independent variables were body sway, breathing patterns, cardiac cycles for different stances and distances with testing order assigned in a counterbalanced manner for each subjects. The dependent variable was score upon release of the 9 arrows. Hypothesis were tested at the .05 level of significance. The study design was a 2-way(stance X distance)factorial ANOVA with repeated measures on assigned factors. The levels of assigned factors were. open, square, and close stance;30, 50 and 70 meters. The data were analyzed using ANOVA and multiple regression. The results were summarized as follows; 1. The performance in archery was not effected by stances, cardiac cycles, breading patterns, but effected by distances. 2. In general, the performance in archery was not effected by cardiac cycles, but there was significant individual differences between cardiac cycles and the performance in archery. 3. The performance in archery was not effected by breading patterns, but most of subjects accustomed to breading pattern 4 and 5 than others. 4. There were individual differences in breading patterns and all of the archers did not have their own fixed breading pattern. 5. The body sway was effected in accordance with change of the distance. 6. The performance in archery was not effected by body sway with different distances.

수국차(Hydrangea serrata Seringe)의 액상 가공을 위한 추출조건 설정

김인호(In-Ho Kim),정낙희(Nak-Hee Chung),한대석(Daeseok Han),이창호(Chang-Ho Lee),오세욱(Se-Wook Oh) 한국식품영양과학회 2003 한국식품영양과학회지 Vol.32 No.7

수국차를 액상가공의 원료로 개발하기 위한 기초로서 온도, 농도 등 적정 추출조건을 설정할 목적으로 열수가열과 침출로 나누어 조사하였다. 열수가열은 100℃ 열수로 0.1%~0.4%(w/v) 농도에서 2분간 가열하였으며, 침출은 온도 40℃~100℃ 경우와 농도 0.2%~1.0%(w/v)로 나누어 각각 2분간 침출하였다. 시료는 단맛을 중심으로 쓴맛, 떫은맛, 색, 향 등을 관능검사하고 통계처리로 최적 조건을 설정하였다. 수국차를 가열한 경우 쓰고 떫은맛이 강하였으며 기호도가 최대 4점 미만으로서 침출의 경우와 비교하여 낮은값을 나타내었다. 수국차의 최적 추출조건은 100℃에서 2분간 침출한 경우로서 0.5%(w/v) 농도에서 종합적으로 가장 높은 기호도를 나타내었다. Water extraction of Suguk (Hydrangea serrata Seringe) was conducted for optimum condition of beverage processing on the boil or dip in water. Extraction samples for sensory evaluation (color, flavor, sweetness, bitterness, astringency) of the plant were boiled in water ranging 0.1%~0.4% (w/v) or dipped in water ranging 0.2%~1.0% (w/v) during 2 min. Samples boiled in water were evaluated low sensory quality with strong bitter and astringent taste. Samples dipped in water showed higher value than that boiled in water on the sensory evaluation. Sample 0.5% (w/v) dipped in water at 100℃ during 2 min. was decided as an optimum condition for beverage processing of the plant.

Super multi-view 3-D display system based on focused light Array using reflective vibrating scanner array(ViSA)

Ho-In Jeon(전호인),Nak-Hee Jung(정낙희),Jin-San Choi(최진산),Young Jung(정영),Young Huh(허영),Jung-Sam Kim(김정삼) 한국방송공학회 2001 방송과 미디어 Vol.6 No.2

성장기 어린이들의 뼈대성숙도와 신체구성의 관계

송종국(Jong-Kook Song),유승희(Seung-Hee Yoo),정낙희(Nak-Hee Jung) 대한체질인류학회 2001 해부·생물인류학 (Anat Biol Anthropol) Vol.14 No.3

본 연구 목적은 9-12세 남자 어린이의 뼈대성숙도를 평가하고, 뼈대성숙도별 신체구성변인의 차이점을 평가하는 것이다. 연구대상자는 경기도 성남시에 소재한 1개 초등학교에서 4-6학년에 재학 중인 9-12시 1 남자 어린이 총 258명을 집단 무선 표집 방법으로 추출하였다 체격은 몸무게, 키, 앉은키, 뼈너비 (위팔뼈아래끝너비, 넙다리뼈아래끝너비), 근육부위 둘레 (가슴둘레, 위팔둘레, 굽힌위팔둘레, 허리플레, 엉덩이둘레, 넓적다리둘레, 종아리둘레 ), 피부밑지방 (위팔 뒷부분, 어깨뼈 아래부분, 엉덩뼈능선 윗부분, 넓석다리 부위, 종아리 중간부위)을 계측하였다. 뼈대성숙은 TW2 방법을 이용하여 왼손과 손목을 방사선 촬영 후 RUS, Carpals, TW2-20 정수를 산출하였고 ,RUS 접수를 근거로 뼈나이를 산출하였다. 신체구성 연인은 BlA-31O을 이용하여 체지방율, 체지방량, 제지망량, 총수분량을 평가하였고 , 신체부위별 체지방 분포도 지수인 WHR(waist/hip), WTR(waistlthigh)을 산출하였다. 자료의 통제처리는 PC-SAS 통계 프로그램을 이용하여 평균과 표준절차를 계산하였고, 뼈대성숙도별 조숙, 보통, 미숙군 세 그룹의 신체구성 차이를 평가하기 위하여 일원변량분석 (One-way ANOVA)을 적용하였고, 통계적으로 유의한 차이가 나타날 경우 Duncan ’ s Multiple Range Test 사후검증을 하였다 모든 통제치의 유의수준은 P<0.05 성정하여 검증하였다. RUS 평균은 9세 298.2±75.6, 1세 331.6±120.2, 11세 369.8±97.0, 12세 482.6±148.2 이였으며, Carpals 평균은 9세 633.6±166.9, 10세 723.4±134.9, 11세 804.7±128.7, 12 세 927.7土77.5정이였고, TW2-20 평균은 9세 569.2±126.7, 10세 628.8±126.7, 11세 701.8±120.9, 12세 829.2±101.1 이였다. 연령별 뼈나이는 9세 9.7±1.9, 10세 10.5±2.3,11세 11.7±2.0,12A11 13.6±1.5로 실제나이보다 뼈나이가 높게 나타났다. 뼈대성숙도에 따라 신체구성의 차이를 형가하기 위하여 대상자들의 성숙수준에 따라 세 그룹으로 분류하였다 미숙군: 25 percentile 미만, 보통군 25~75 percentile 사이, 조숙군 75 percentile 이상 12세의 경우 뼈대성숙 수준별로 신체구성 변인에서 유의한 차이가 없었으나, 9세, 10세, 11세에서는 그룹별 유의한 차이가 있었다. 9세의 경우 BMl에 있어서 세 그룹의 평균은 조숙군 21.23土5.12kg/m², 보통군 18.05±2.69 kg/m², 미숙군 17.74± 2.84 kg/m² 순으로, 조숙군은 미숙군과 보통문에 비해 유의하게 (P<0.05) 높게 나타났다 WHR 은 조숙군 0.88±om, 보통군 0.84±0.04, 미숙군 0.S2±0.03 순으로 나타났고, WTR 은 조숙문 1.47±t0.l0, 보통군 1.43±0.06, 미숙군 1.40±0.06 순으로 모두 미숙군과 보풍군, 보통군과 조숙군간에는 통계적으로 유의한 차이가 나타나지 않았으나 미숙군과 조숙군간에는 유의한 차이 (P<0.05)를 보였다