공기온돌시스템의 패널형상에 따른 유동 및 열전달 특성에 관한 연구

정희석(Hee-Suk Chung),윤정배(Jung-Bae Yoon),이진호(Jinho Lee),정학모(Hak-Mo Chung) 대한설비공학회 2003 대한설비공학회 학술발표대회논문집 Vol.2003 No.-

국내 상위랭킹 테니스선수들의 투어일기 분석: 키워드 네트워크 분석적용

정희석(Hee Seok Chung),차정훈(Jung Hoon Cha),곽보라(Bo-Ra Kwak) 한국체육측정평가학회 2020 한국체육측정평가학회지 Vol.22 No.4

이 연구의 목적은 키워드 네트워크 분석기법을 활용하여 국내 상위랭킹 테니스선수들의 투어일기를 분석하는 것이다. 구체적으로 테니스 투어일기를 분석하여 개인기록의 가치와 의미, 성별에 따른 차이를 확인한 후 향후 세계적인 투어무대를 준비하는 국내 테니스선수들에게 유용한 참고자료를 제공하고자 한다. 이러한 목적을 달성하기 위하여 국내 상위랭킹 선수로 활동 중이며 투어일기를 작성하였던 6명(남자 3명, 여자 3명)을 목적표집 하였으며, 2013년 12월부터 2019년 12월까지 6년 동안 선수들이 테니스코리아(Tennis Korea)에 게재한 96편의 투어일기를 연구대상 자료로 선정하였다. 수집된 자료는 Krkwic 소프트웨어 프로그램을 이용하여 주요단어를 추출한 후 공출현 빈도를 산출하였다. 키워드 네트워크 분석은 Netminer 4.0을 활용하여 연결중앙성을 분석하였다. 분석결과는 다음과 같다. 첫째, 남자선수 투어일기에서 나타난 주요단어는 ‘출전’, ‘승리’, ‘패배’, ‘시즌’, ‘컨디션’, ‘부상’, ‘훈련’ 등이었으며, 시즌에 대한 훈련의 과정과 대회출전에 대한 내용을 내포하고 있는 것으로 나타났다. 둘째, 여자선수 투어일기에서 나타난 주요단어는 ‘선수’, ‘출전’, ‘예선’, ‘본선’, ‘시즌’, ‘진출’, ‘생각’ 등이었으며, 시즌 중 출전한 대회에서 예선, 본선 참가에 대한 자신의 생각을 내포하고 있는 것으로 나타났다. 셋째, 여자선수의 투어일기는 남자선수에 비해 상대적으로 감성적인 키워드가 많은 것으로 나타났으며, 남자선수는 자기성찰에 대한 키워드가 많은 것으로 나타났다. 결론적으로 남자선수와 여자선수 간 키워드에서는 차이를 나타냈으나, 각 시즌 대회별 개개인의 목표가 명확하게 드러나고 있다는 점은 동일한 것으로 해석된다. The purpose of the study is to analyze the tour diaries of top ranked tennis players in Korea using the keyword network analyzer method. Specifically, we would like to analyze the tennis tour diary to check the difference between the value, meaning and gender of personal records and provide good reference to domestic tennis players preparing for the future world tour stage. In order to achieve this goal, six players (3 men and 3 women) who were active as top ranked players in Korea and wrote tour diaries were targeted, and 96 tour diaries published by six players on Tennis Korea (Tennis Korea) were selected as research materials for six years from December 2013 to December 2019. The collected data were extracted using the Krkwic software program and calculated the frequency of publication. Keyword network analysis used Netminer 4.0 to analyze centrality of connectivity as an indicator. The analysis results are as follows. First, the main words in the male athlete"s tour diary were ‘participation’, ‘Victory’, ‘Defeat’, ‘Season’, ‘Condition’, ‘Injury’ and ‘Training’ and so on, and it was found to contain information on the course of training for the season and participation in the competition. Second, the main words in a female athlete"s tour diary were ‘Player’, ‘Participation’, ‘qualifier’, ‘Final’, ‘Season’, ‘Advance’ and ‘Thought’, and it was found that he had his idea of qualifying and participating in the finals in the competition he participated in during the season. Third, the female athlete"s tour diary showed that there were relatively more emotional keywords than male athletes, while male athletes had more keywords for introspection. In conclusion, the keywords between male and female athletes differed, but the same was true that individual goals for each season"s competition were clearly revealed.

유니버시아드 테니스 국가대표 선수의 심상훈련 적용에 따른 스포츠자신감, 심리기술, 뇌파활성

정희석(Chung Hee Seok),김유나(Kim Yu Na) 한국코칭능력개발원 2017 코칭능력개발지 Vol.19 No.1

골반압박벨트 착용이 한발서기 시 여성 천장관절통증 환자의 체간과 고관절 신전근 활성 양상에 미치는 영향

정희석 ( Hee Seok Jung ),전혜선 ( Hye Seon Jeon ),이충휘 ( Chung Hwi Yi ),권오윤 ( Oh Yun Kwon ) 한국전문물리치료학회 2012 한국전문물리치료학회지 Vol.19 No.2

The pelvic compression belt (PCB) contributes to improving sacroiliac joint stability, and it has been used as an additional therapeutic option for patients with sacroiliac joint pain (SUP). This study aimed to investigate whether the muscle activation patterns of the supporting leg was different between asymptomatic subjects and subjects with SUP during one-leg standing, and how it changes with the PCB. 15 subjects with SUP and 10 asymptomatic subjects volunteered to participate in this study. Surface electromyography (EMG) data (reaction time [RT] and muscle activation) were collected from the internal oblique, lumbar multifidius, gluteus maximus and biceps femoris muscles during one-leg standing with and without the PCB. Without the PCB condition, in the SIJP group, the biceps femoris muscle showed the fastest RT among all muscles (p<.05), whereas in the asymptomatic group, the RT of the internal oblique muscle was the most rapid (p<.05). In condition without the PCB, the biceps femoris EMG amplitudes in the SUP group were significantly greater than that in the asymptomatic group (p<.05). After the application of the PCB, the RT of the biceps femoris muscle was significantly increased only in the SUP group (p<.05). Moreover, the biceps femoris EMG amplitudes significantly decreased and the gluteus maximus EMG amplitudes significant increased only in the SIJP group by applying the PCB (p<.05). However, this had no such effect on the gluteus maxim us and biceps femoris EMG patterns in the asymptomatic group (p>.05). Thus, this study supports the applying the PCB to patients with SUP can be used as a helpful option to modify the activation patterns of the gluteus maxim us and biceps femoris muscle.

야구에서의 피칭 동작시 숙련자와 미숙련자간의 운동역학적 차이 분석

이충훈(Chung Hoon Lee),정희석(Hee Suk Jeong),신성훈(Sung Hoon Shin) 한국체육교육학회 2002 한국체육교육학회지 Vol.6 No.2

The purpose of this study was to investigate the difference on ground reaction forces during pitching between the experienced group and the unexperienced group. The subject were divided into two groups consisting 5 mails respectively. The dependence variable was pitching experience and the independent variables were total contact time, vertical ground reaction force, anterior-posterior ground reaction force, inner-outer ground reaction force, maximal vertical ground reaction force. For statistical analysis, independent- samples test was used. On the basic of the results in this study, conclusions were as follows : 1. The experienced group had shorter total contact time than the unexperienced group(p< .05). 2. There was no significant difference between the two groups for the maximal vertical ground reaction force(p,< .05) 3. There was no significant difference between the experienced group and the unexperienced group for the Anterior-Posterior ground reaction force , except for the crossing of braking force and propulsive force (p< .05). 4. For the inner-outer ground reaction force, The experienced had greater outer force than the unexperienced group(p< .05).

10주간의 탄력밴드 저항성 운동이 중년 여성의 체지방과 체력에 미치는 영향

서충진 ( Chung Jin Seo ),정희석 ( He Seok Jung ),장세봉 ( Sae Bong Jang ),고제원 ( Jae Won Go ),고영환 ( Young Hwan Go ),권호준 ( Ho June Kwan ),노성규 ( Sung Gyu Ro ),강병선 ( Byung Sun Kang ),김기영 ( Gi Young Kim ),김은정 ( Eun 국제통합대체의학협회 2008 국제통합대체의학회지 Vol.4 No.1

The purpose of this study was to identify the effect of elastic strength training fat of body and physical strength in elderly women. Elderly women of twenty four was participated voluntary in this study. The subjects had lived in the K city and treated with elastic strength training for 10 weeks. The results were as follower, the elastic strength training showed the significant difference in fat of body and physical strength of elderly women. According to this study elastic strength training showed improvement increase physical strength and decrease fat of body in elderly women.

엘리트 남자 테니스 선수들의 양손 백핸드 스트로크 동작에 대한 운동학적 분석

차정훈 ( Jung-hoon Cha ),정희석 ( Hee-seok Chung ),김석환 ( Seuk-hwan Kim ) 한국체육대학교 체육과학연구소 2016 스포츠사이언스 Vol.33 No.2

본 연구의 목적은 엘리트 남자 테니스 선수들의 백핸드 스트로크 동작에서 나타나는 운동학적 변인들을 정량적으로 분석하는데 있다. 본 연구의 목적을 달성하기 위하여 K대학교 엘리트 남자 테니스 선수 7명을 대상으로 적외선 카메라 12대를 사용하여 3차원 동작분석을 실시하였으며 다음과 같은 결론을 얻었다. 첫째, 구간 별 소요시간은 P2구간이 가장 빠른 시간 내에 수행 한 것으로 나타났다. 둘째, 라켓의 이동범위는 좌우 방향, 수직 방행에 비해 전후 방향으로 가장 큰 이동범위(ROM)를 보였다. 셋째, 라켓의 최대 선속도는 전후 속도가 가장 빠르게 나타났고, 다음으로 좌우 속도, 수직 속도 순으로 나타났으며 합성속도는 21.48±1.36 m/sec 로 나타났다. 넷째, 각 분절(골반, 몸통, 상완, 라켓)의 최대각속도는 라켓을 중심으로 원위 분절인 골반이 가장 느린 각속도를 보였으며 몸통, 상완, 라켓의 순으로 나타났고, 각 분절의 최대 각속도 발현 시점은 골반, 몸통, 상완, 라켓 순서를 보였는데 이는 근위 분절로부터 원위 분절까지 운동량이 연속적으로 전이되는 채찍 모형 패턴(Whip-like pattern)으로 백핸드 스토로크 동작에 있어 효과적인 동작을 수행한 것으로 판단된다. The aim of this study was to analysis quantitatively kinetic variables on two-handed backhand stroke of elite male tennis players. Seven tennis players who belong to K university were participated, and 3-dimensional motion analysis of their backhand stroke was conducted by using 12 infrared cameras. The results were as follows. First, the time required by sections indicated duration of P2 section was the shortest. Second, range of motion (ROM) of racket indicated anteroposterior motion was the largest, followed by side to side and vertical direction. Third, maximal linear velocity showed anteroposterior velocity was the fastest, followed by side to side and vertical velocity, and resultant velocity was 21.48±1.36 m/sec. Fourth, maximal angular velocity of pelvis, trunk, upper arm and racket showed velocity of pelvis which was most distal from racket was the slowest, followed by trunk, upper arm, and racket. And the timing of maximal angular velocity of pelvis was the fastest, followed by trunk, upper arm and racket. It concluded that this Whip-like pattern which meant momentum moved from distal to proximal part was effective on backhand stroke of tennis.

자전거타기 재미요인과 체육수업만족도

박세준(Park Se Jun),정희석(Chung Hee Suk),최기훈(Choi Ki Hoon) 세계태권도문화학회 2016 세계태권도문화학회지 Vol.- No.12

This study aims to inquire into the influence of fun factor on elementary school students who participated in bicycle-riding program during physical education classes. To achieve the purpose, 448 students from 3rd to 6th grades at a elementary school in Gyeonggi-do which conducts bicycle-riding program was selected. Non-probability sampling was used to collect the data and it was processed using Windows SPSS ver. 12.0. This study used frequency analysis, factor analysis, reliability analysis, t-test, one-way ANOVA, two-way ANOVA, and multi-regression analysis. The results are as follows: First, female students show higher result in both fun factor and class satisfaction than male students. There is a significant difference in sociability and compassion only among fun sub-factors. There is no significant difference in class satisfaction. Second, 3rd graders show the highest result in both fun factor and class satisfaction. In addition, there is a significant difference in the fun factor and class satisfaction between school years. Third, in fun factor analysis, female 4th graders are the highest and male 6th graders are the lowest. Fourth, male 3rd graders show highest class satisfaction, while male 6th graders are the lowest. The analytical results of the influence of the fun factor in bicycle-riding has on PE class satisfaction are as follows: Fun factor has a significant influence on PE class satisfaction. In addition, all the sub-factors, that is, interest, sociability, health, and compassion, have significant influence on the sub-factors of PE class(i.e. class management, class environment, and athletic ability). Interest among the fun sub-factors had the highest influence on PE class satisfaction, which suggests that bicycle-riding program is interesting to students and is an amusing program.

훈련 경험 및 성별에 따른 테니스 선수의 라이프 스킬 비교

최기훈(Choi, Ki-Hoon),정희석(Chung, Hee-Suk),신승엽(Shin, Seung-Yup) 한국체육과학회 2016 한국체육과학회지 Vol.25 No.2

This study was to analysis life skill of tennis players according to qualitative research used open questionnaires. The object of investigation were two tennis players. One is male tennis player who trained in America and the other is female tennis player who trained in Japan. The conclusions were as follows; They had an experience the ability of coaches of America and Japan. The coaches tried to grow sense of closeness between coaches and players, and psychological technique training were conducted according to many consultation. Two tennis players told about the advantage of tennis and life skill according to tennis. In physical technique, they told that they have no stress about weight control because of life of tennis player, and male tennis player told that it is easy to find the way to destination because of character of tennis training and female tennis player told that she overcame a language barrier because of good judgment and ability to react instantly in tennis game. In psychological technique, they told that the tennis fostered self-control capability, concentration and self-confidence because of character of tennis. About social technique, they told that they have good interpersonal skills because of character of tennis training.

아마추어 남·여 테니스 선수들의 서비스 루틴 훈련의 효과

최기훈(Choi, Ki-Hoon),정희석(Chung, Hee-Suk),정용철(Chung, Yong-Chul) 한국코칭능력개발원 2016 코칭능력개발지 Vol.18 No.2