자연과학편 : 3차원(次元) 영상분석(映像分析)에 의한 역도경기(力道競技)의 인상동작(引上動作)에 대한 운동학적(運動學的) 연구(硏究)

예종이(JongE.Yhe) 한국체육학회 1992 한국체육학회지 Vol.31 No.2

The purpose of this study was to analyze and compare the kinematic parameters of the bar, body. and system in the Snatch movements by using three-dimensional film analysis as the barbell weights generally increasing by 5 percents ranging from 85% to 100% of the Maximum Barbell Weight for each weightlifting athlete.six weightlifting athletes were selected as subjects. and each of them executed Snatch with barbell weight from 85% MBW to 100% MBW.By using three-dimensional film analysis. it was possible to analyze the biomechanical parameters of the C.O.G of the bar. body, and system in the Snatch movements.The conclusions were as follows:1. The C.O.G of the bar, body, and system was moved on the same vertical line in the Lock Out phase and it s position was moved backward of the body in the Lock Out phase.2. The maximum vertical height of the C.O.G of the bar and the system were decreased steadily as barbell weight were generally increased from 85% MBW to 100% MBW.3. The vertical height of the C.O.G of the bar was higher than 2nd pull phase, and the C.O.G of the bar was elevated to reach the maximum vertical height but the C.O.G of the body was declined since the 2nd pull.4. The maximum velocity of the C.O.G of the bar, the body, and the system were decreased steadily as barbell weight increased from 85% MBW to 100% MBW.5. The vertical Velocity-Time curve of the C.O.G of the bar was showed only one peak point immediately after 2nd pull, but the vertical Velocity-Time curve of the C.O.G of the body was showed two peak points ; first peak point was showed during the 1st pull. second peak point was showed to the end of the 2nd pull.6. The maximum vertical velocity of the C.O.G of the body was showed at the end of the 2nd pull, The C.O.G of the bar was reached on the maximum vertical velocity immediately of the 2nd pull.7. In the case of the pull phase, the maximum vertical acceleration of the C.O.G of the bar was showed as the bar was passing the knee, and the C.O.G of the body was showed at the end of the 2nd pull.8. The Degree-Time curve of the hip was increased steadily until the end of the 2nd pull, but the Degree-Time curves of the ankle and knee were showed two peak points : 1st peak was showed at the end of the 1st pull, 2nd peak was showed at the immediately after 2nd pull.

「한국인(韓國人)의 체육(體育)및 체육인(體育人)에 대한 태도연구(態度硏究)」 - 대도제작(大度製作)을 중심(中心)으로 -

芮鍾二(JongE.Yhe) 한국체육학회 1976 한국체육학회지 Vol.13 No.-

This study, as one of the works which attempt to introduce Thurstones’s Equal-Appearing-Interval-Technique to the measurement of Psychological dispositions on a Favor-disfavor con-tinum, purports to investigate the prevailing attitudes toward physical culture and culturists about which the korean intellectuals do seemingly expose certain psychological conflicts under the typical korean situations in culture and social environment.The main purposes of this study are two-fold.1) The construction of attitude scales by means of the Thurstone’s method in regard to the two concepts, physical culture and culturists.2) A comparative study of different socio-psychological groups in terms of the attitude scores measured by the attitude scales constructed.By the concept of physical culture as used in this study is meant the physical culture viewed as an academic field encompassing both theories and practieces, and by the concept of physical culturists, all those who are engaged in physical culture in one way or another--e. g., physical educators, trainers, athletes, and others associated with them.The scale constructions are proceeded according to the Thurstone’s method from the initial stage of preparing questionaires (the numbers of questions concerning physical culture and culturists are 93 and 97, respectively) to the final construction of the scales(for the attitude scales constructed concerning physical culture and culturists, refer to Table-5 and Table-6, respectively).The reliability of the scales were checked according to the Test-Retest method and the Split-Half method(Table-7 represents the tested reliability of the scales). Some Problems for the scale construction, however, are in the fact that the scale values do not maintain consistently a perfect equal distance and the questions on the extreme disfavor side are not sufficient enough.Evaluation for the scale construction were entrusted to the 34 faculties of the Korea Military Academy whose majors include sociology, education, psychology, and other relevant disciplines. They are regarded as well qualified for the evaluations. The samples for this study are 3,943, selected in Seoul region by random method. They were in turn classified inte several groups according to age, sex, profession, and education.Some of the interesting findings of this study are: Generally speaking, the attitudes toward physical culture and culturists may be said to be favorable or positive--i.e., the attitude score(average value) for the physical culture is 4.70(see Table-8), and the score for the physical culturists, 5.27(see Table-9), both of which are lower than 6.0, a midpoint value on the scales. However, that the score for the physical culturists is higher than that for the physicla culture by 0.57(to be closer to the score 6.0) seems to tell us that the Korean intellectuals’ attitudes toward physical culturists are somewhat more disfavorable or negative than those toward physical culture. This result may represent certain psychological conflicts among the Korean intellectuals in their attitudes toward physical culture and culturists--that is, physical culture is one thing, and physical culturists, another.Any pioneering works are not, of course, without limitations. For a more meaning ful attitude score, not only the construction of more accurate scales but certain purposeful plan-ning for sample selection that may cover wider range of the psychological objects concerned would be necessary. Besides these, the following points may also be taken into account to increase validity of the research:1) A comparison of the relative attitudes toward physical culture and other disciplines.2) A more detailed classification of the physical culturists, and the corresponding scale construction and attitude survey.

Counting the Hidden Costs of Male Reproductive Health

De Jonge Christopher J.,Barratt Christopher L.R.,Pacey Allan A. 대한남성과학회 2022 The World Journal of Men's Health Vol.40 No.2

자연과학편 : 멀리뛰기의 퍼포먼스에 영향을 미치는 요인(要因)에 대한 생체력학적(生體力學的) 분석(分析)

예종이(JongE.Yhe) 한국체육학회 1987 한국체육학회지 Vol.26 No.1

The purpose of this study was to identify the effects of the kinetic and kinematic variables on the performance in the Long Jump.21 Long Jumpers were served as subjects. A single Force Platform was used to analyze kinetic variables and measured kinematic variables by using 16mm High-Speed Camera and Motion Analyzer.The results and conclusion were as follow:I. Kinetic Variables1. The Force-Time curve of the Vertical Ground Reaction Force produced two peak points at the take-off.2. The Maximum Vertical, Horizontal, and Sideward Ground Reaction Forces exerted 4.31 B.W., 1.25 B.W., and 0.25 B.W., at the Take-off, respectively.3. The Maximum Vertical and Horizontal Ground Reaction Forces were significantly correlated with the Record, respectivly(r=0.40 ; P<0.05 for the former, r=0.67 ; P<0.05 for the latter).4. The Vertical Impulse and Horizontal Impulse singificantly correlated with the Record, respectively(r=0.45 ; P<0.01 for the former, r=0.48;P<0.05 for the latter) and the Vertical Impulse was exerted 6 times larger than Horizontal Impulse and 12 times larger than sideward Impulse.II. Kinematic Variables1. The Approach Velocity of the last 1 stride before take-off was 8.4-9.4m/sec and the Resultant, Horizontal, and vertical velocities at the take-off were 7.3-7.8m/sec, and 2.0-2.6m/sec, respectively. Those 4 Velocity Variables significantly correlated with the Record (r=0.83 for the 1st, r=0.68 for the 2nd, r= 0.77 for the 3rd, and=0.77 for the 4th ; p<0.05)2. The Approach Horizontal Velocity was decreased about 17-20% at the Take-off.3. Nonsignificant correlations were found between the Height of C.G. at the Take-off or the Landing and the Record, respectively.4. The Angle of C.G. at the Take-off was 18.4-21.0˚ and significantly correlated with the Record(r=0.48 ; P<0.05). But, Inclinations of Leg at the Contact, Take-off, and Landing were nonsignificantly correlated with the Record, respectively.

Male Attitudes towards Infertility: Results from a Global Questionnaire

De Jonge Christopher J.,Gellatly Steven A.,Vazquez-Levin Mónica H.,Barratt Christopher L.R.,Rautakallio-Hokkanen Satu 대한남성과학회 2023 The World Journal of Men's Health Vol.41 No.1

Purpose: In general, men are less likely to seek health care than women. Infertility is a global disease that afflicts approxi-mately 15% of reproductive age couples and the male contributes to 40% of the diagnosable cause. Remarkably, no large or multi-national population data exist regarding men’s perceptions about their infertility. The purpose of this study was to advance our knowledge about the infertile male’s social experience regarding: (1) how they feel about their infertility, (2) what motivated them to seek health care, (3) how likely are they to talk with others about their infertility, (4) their awareness of male infertility support groups, and (5) what their primary source for information is regarding male infertility? Based on the results from this study, these simple questions now have clearer definition. Materials and Methods: An Institutional Review Board-approved, male-directed, anonymous questionnaire translated into 20 languages was made globally available through the Fertility Europe website (https://fertilityeurope.eu). Males (n=1,171) age 20–49 years were invited to complete the online survey after informed consent. Results: Most respondents were European (86%). Of European men, <15.8% were self-motivated to seek medical help. Fur-ther, their physician was not the primary source of information regarding their infertility. While most men (59%) viewed their infertility positively, a large majority were not very likely (73%) to talk about it. Most respondents indicated a lack of aware-ness or absence of male infertility support groups. Conclusions: These are the first multi-national population data revealing men’s feelings about their infertility, what motivates them to seek help and their awareness of resources for peer support and information. These findings also serve to highlight significant gaps that exist in the provision of male reproductive health care and in supportive resources for men suffering from infertility. We offer recommendations on how to address the problem(s).

자연과학편 : 고관절(股關節) · 슬관절(膝關節) · 거퇴관절(距腿關節)의 신전동작(伸展動作)시 2 - 관절근육(關節筋肉)의 길항작용(拮抗作用) 에 대한 IEMG 분석(分析)

예종이(JongE.Yhe) 한국체육학회 1990 한국체육학회지 Vol.29 No.2

The purpose of this study was to elucidate the antagonistic inhibition in double-joint leg muscles ; the Rectus femoris, the Biceps femoris, and the Gastrocnemius, during the simultaneous hip, knee, and ankle joint extension.Experiments were performed for measuring and analyzing the changes of the %IEMG of double joint leg muscles during voluntary isometric contractions by electromyogram.The results were as follow :1. The %IEMG of the Rectus femoris, Biceps femoris, and Gastrocnemius respectively were non-linear relation with the %MVC during the individual knee or hip or ankle joint extension.2. The %IEMG of the Rectus femoris, Biceps femoris and Gastrocnemius were considerably less than the ones for individual knee or hip or ankle joint extension, in case of the simultaneous hip, knee, and ankle joint extension or hip and knee joint extension.3. The %IEMG of the Rectus femoris was high than the ones for the simultaneous hip, knee, and ankle joint extension, in case of the simultaneous hip and knee joint extension, but the IEMG of the Biceps femoris was not difference.

자연과학편 : 역도경기(力道競技)의 인상동작(引上動作)에 대한 운동력학적(運動力學的) 분석(分析)

예종이(JongE.Yhe) 한국체육학회 1992 한국체육학회지 Vol.31 No.1

The purpose of this study was to analyze and compare the change of the Kinetic parameters in the Snatch movements as the barbell weights generally increasing by 5 percent ranging from 85% to 100% of the maximum barbell weight for each athlete. Seven weightliftion ahtletes were selected as subjects in study.Each of them executed snatch with barbed weights from 85% MBW to 100% MBW of the maximum snatch record and the ground reaction forces of the left and right foot were measured by using force platform. It was possible to analyze the Resultant Ground Reaction forces of the left and right foot, and to measure the peak times, and to draw the force-time curves for each % MBW, by using the Quattro-pro soft program.The conclusions were as follows:1. The Vertical Ground Reaction Force was showed three peak point, and magnitude of 2nd peak point greater than 1st peak point about 22%.2. The Anterior Ground Reaction force was increased to the peak during the second pull.3. All lefters performed with a backward jump during the Lock Out phase, and the duration of the jump was remained approximately constant as the barbell weights were generally increased by 5% MBW.4. The Resultant values of the Latemal Ground Reaction Force was showed zero.5. The Peak times of the Vertical Ground Reaction force were remained approximately constant as the barbell weights were generally increased, from 85% MBW to 100% MBW by 5%, MBW.6. The 1st peak and 2nd peak values were rised steadily as barbell weight increased from 85% MBW to 95% MBW, the difference between 95% MBW and 100% MBW was not showed.7. The peak values of the Vertical Ground Reaction Forces relative to system weight were decreased steadily as barbell weight were generally increased from 85% MBW to 100% MBW, by 5% MBW.

Control of the Crystal Growth Shape in CH₃NH₃PbBr₃ Perovskite Materials

Le, Quyet Van,Shin, Jong Wook,Jung, Jin-Hee,Park, Jongee,Ozturk, Abdullah,Kim, Soo Young American Scientific Publishers 2017 Journal of nanoscience and nanotechnology Vol.17 No.11

<P>CH3NH3PbBr3 (MAPbBr(3)) materials with perovskite structure were grown by a two-step process using Pb(CH3COO)(2). 3H(2)O and methyl amine bromide (MABr). By changing the concentration of MABr in isopropyl alcohol (IPA) solvent and the annealing temperature, the shape of CH3NH3PbBr3 materials can be controlled to afford nanocubes, nanowires, nanorods, and wrinkled structures. MAPbBr3 with single cubic structure was obtained at a MABr concentration of 3 mg/mL in IPA, and a nanorod array of MAPbBr3 was realized at a MABr concentration of 9 mg/mL in IPA at room temperature. Uniformly wrinkled shapes were formed after the synthesis temperature was increased to 60 and 90 degrees C. The X-ray diffraction patterns, Fourier transform infrared spectra, and X-ray photoelectron spectra of CH3NH3PbBr3 nanorods confirmed that the pure perovskite phase was obtained by dipping Pb(CH3COO)(2). 3H(2)O in MABr/IPA solution. The optical bandgap of the CH3NH3PbBr3 nanorods was estimated from the Tauc plot as 2.2 eV. The evolution of perovskite shapes is expected to lead to improvements in the electrical properties and surface contact, which are important factors for realizing high-performance devices.</P>

Dietary Herbal Supplements with Phenylephrine for Weight Loss

Frank Greenway,Lilian de Jonge-Levitan,Corby?artin,Andrew Roberts,Irene Grundy,Catherine Parker 한국식품영양과학회 2006 Journal of medicinal food Vol.9 No.4

This study was designed to evaluate the efficacy and safety of a dietary herbal supplement containing citrusaurantium and phenylephrine in the treatment of obesity. Two pilot studies enrolled healthy subjects with body mass indexes2540 kg/m2 to similar 8-week weight loss programs. Safety was assessed by physical examination and laboratory tests atscreening and 8 weeks. The first pilot study randomized eight subjects to citrus aurantium (herbal phenylephrine) or placebo.Body composition by DEXA scan, waist circumference, and resting metabolic rate (RMR) were measured at baseline and 8weeks. Food intake and appetite ratings were measured at baseline and week 2. The second pilot study randomized 20 sub-jects to two 2-hour RMR tests a week apart after phenylephrine (20 mg) or placebo followed by phenylephrine (20 mg) threetimes a day for 8 weeks. In the first pilot study, the citrus aurantium group gained 1.13. 0.27 (mean. SEM) kg comparedwith 0.09. 0.28 kg in the placebo group (P. .04). RMR at baseline rose more in the citrus aurantium group, 144.5. 15.7kcal/24 hours, than the placebo group, 23.8. 28.3 kcal/24 hours (P. .002), but not at 8 weeks. DEXA, waist circumfer-ence, food intake, and hunger ratings were not different. In the second pilot study, the phenylephrine group lost 0.8. 3.4 kgin 8 weeks (not significant), and RMR increased more in the phenylephrine group (111.5. 32.6 vs. 37.4. 22.7 kcal/24hours, P. .02). There were no significant safety issues in either study. Although no toxicity was seen, these pilot studiessuggest phenylephrine is not efficacious for weight loss.

스포츠 교육학 : 초 · 중등학교 체육교사의 교수행동과 운동참여시간에 관한 기술 - 분석적 연구

윤명희(MyungHeeYoon),김진원(JinWonKim),예종이(JongE.Yhe),주명덕(MyungDuckJu),이철화(ChulHwaLee),조순묵(SoonMukCho) 한국체육학회 1996 한국체육학회지 Vol.35 No.4

본 연구는 초·중등학교 체육 교수-학습과정에서 바람직한 체육교수행동을 분석하여 규명하고 학습자의 운동참여시간(MET-PE)에서 학습자의 움직임 시간과 비움직임 시간을 파악 분석하여 바람직한 교수행동과 학습자 행동을 규명하고자 실시하였다.연구대상 교사는 4개 도시에 근무하는 초등교사 16명, 중학교 체육교사 16명, 고등학교 체육교사 16명의 체육 수업을 비디오로 녹화하거나 연구자가 현장에서 직접 관찰하여 자료 수집을 하였으며, 학습자 행동은 피험교사가 실시하는 체육수업시간에 1명의 학습자를 임의 선정하여 관찰하였다. 관찰 기간은 1995년 9월부터 1996년 4월까지의 체육 수업을 교사의 교수행동 분석도구는 Anderson과 Barrette(1980)의 교수행동 관찰도구를 활용하여 분석하였으며, 학습자 행동은 Laubach(1975)의 BESTPED도구를 활용하여 5초관찰 5초기록의 간격기록법을 활용하여 분석하였다.분석결과 교사들이 40분 체육수업시간 동안에 학습자의 운동수행관찰 시간(22.84%)에 가장 많은 시간을 소비하고 있으며, 다음이 수업관찰시간(19.33%), 상호작용(15.35%)으로 수업의 시작과 끝 지시, 안전지도, 준비 정리운동 및 학습자 관찰시간이 절반이 훨씬 넘는 시간을 소비하고 있다는 것이 나타났다.학습자의 운동지도 (동시지도)는 14.41%로 매우 적은 시간을 학습자 지도에 사용되고 있다는 것은 안으로 학습자의 운동지도(과제지도시간)시간을 높이기 위한 각자의 연구와 개인 연수가 필연적으로 필요하다는 점을 시사해 주고 있다. The purpose of this study was to examine the desirable and undesirable teaching - learning behaviors by analyzing motor engagement time(MET) in the processes of teaching and learning in elementary and secondary physical education classes.The participants of the present study included 16 elementary school teachers, 16 middle school physical education teachers who were teaching in schools at 4 cities. The data were obtained by videotaping or lively observing the physical education classes in which one student was randomly selected to examine his or her behavior. The observation occurred from september of 1995 to april of 1996. The data were analyzed using a 5-second interval recording system. The instruments used in the present study were the Teaching Behavior Observation by Anderson (1980) and the BESTPED by Laubach(1975)The results of the study indicated that the teachers devoted the majority of their time in observing learner`s motor performance during 40-minutes` physical education classes (24.3%), followed by the class observation (19.3%) and interaction (15.4%) including the indication of beginning and ending of the class, safety instruction, warm up and cool-down exercise, and/or learner observation.The results that the teachers spent very little time on motor instruction suggested that it was necessary to increase the time for teaching the motor skills. The motor engagement and motor cancellation times were 45.2% and 54.8%, respectively. The engagement time was very limited, because the motor engagement time included warm-up and cool-down exercises, relocation, and equipment preparation.