Moon Somersault에 關한 硏究

申榮吉 慶北大學校 師範大學 1980 敎育硏究誌 Vol.22 No.-

As follows a synopsis of the study on Moon Somersault. 1. Moon Somersault can be classified into various types: (A). The type that the contestant is to twist his body his body more than 360 degrees at the first somersault of the double somersault and perform a simple somersault at the second somersault. (B). The type that the contestant is to perform a simple somersault at the first of the double somersault and twist his body more than 360 degrees at the second somersault. (C). The type that the contestant is to twist his body more than 180 degrees both at the first and the second somersault of the double somersault. 2. Techniques of Moon Somersault in the horizontal bar, the rings, and the floor are the applications to the three types mentioned above. And the techniques of New Moon Somersault are derived according to how many times the contestant twists his body. 3. Horse Vault's Moon Somersault is expressed in the form that the contestant adds his twists to the whole process of a one-and-a-half-time somersault. 4. This study draws a plan on Moon Somersault in the parallel bars.

자성체 가스관에서 복수의 결함에 의한 원격장와전류 신호특성 조사

신영길,이윤태,송성철,정희성 국립7개대학공동논문집간행위원회 2004 공업기술연구 Vol.4 No.-

Remote field eddy current testing signals have unique signal characteristics such as the equal sensitivity to ID and OD defects and the linear relationship between defect depth and phase signal strength. In this paper, those and new signal characteristics are studied by carefully prepared experiments with gas pipes. Many kinds of defects are designed and fabricated, such as ID and OD defects, axial and circumferential defects, and multiple defects on the same circumference. Multiple defects on the indirect paths and very long defects reveal the linear relationship between defect depth and phase signal strength. Equal sensitivity to ID and OD defects is also demonstrated. It is found that the phase signal is more sensitive to axial defects and the phase signals from circumferential defects tend to underestimate the total defect length.

튜브시트 영역에서의 확관 검사를 위한 보빈 와전류신호 예측 및 해석

신영길,송성철,정희성 국립7개대학공동논문집간행위원회 2005 공업기술연구 Vol.5 No.-

Steam generator(SG) tubes are expanded inside tubesheet holes by using explosive or hydraulic methods to be fixed in the tubesheet. In the tube expansion process, it is important to minimize the crevice gap between tubesheet and the transiton region of tube diameter. In this paper, absolute and differential bobbin probe signals are predicted by a numerical method for several different locations of tube expansion inside and outside the tubesheet and signal variations due to tubesheet, tube expansion and operating frequency are high frequency is good for sizing of expanded tube diameter as well as the detection of transition region. Also learned is that the absolute signal is good for the measurement of expanded tube diameter and the differential signal is good for locating the top of tubesheet and both edges of transition region.

지지대에 인접한 전열관 결함으로 인해 발생되는 보빈 와전류 신호의 예측 및 분석

신영길,이윤태 국립7개대학공동논문집간행위원회 2005 공업기술연구 Vol.5 No.-

In this study, eddy current signals from various anomalous defects in the heat exchanger tube are predicted and their signal slope characteristics are analyzed. The signal changes due to frequency increase are also observed. Based on the accumulated knowledge, the analysis of superimposed signal is attempted which includes the effects of support plate. Both differential and absolute bobbin probe signals are analyzed. For the prediction of signals, axisymmetric finite element modeling is used and this leads us to the utilization of slope angle analysis of the signal. Results show that differential signals are useful to locate the position of defect under the support plate and absolute signals are easy to predict and analyze even though they are superimposed signals. Combined use of these two types of signal will help us accomplish a reliable inspection.

鐵棒 「날아내리기」의 映像分析法的 考察

申榮吉 慶北大學校 1984 論文集 Vol.38 No.-

After estublishing ideal motions of the hetch dismount from the horizontal bar and choosing three gymnasts who is not able to progress any more at the stage of fixation of primitive type and origination of technical type in the skill of hecht dismount, this study is to compare analysis by cinematographic method. The common defects of these three gymnasts are summarized as fllows: (1) The maximization of waist angle at "e" phase. (2) The angle between horizon and body line at "g" phase must be above 30°. (3) The time required from "g" to "h" phase must be short. (4) After releasing hands from horizontal bar, the gymnasts should raise trunk above horizon when waist is passed over bar. (5) Increasing the rotational speed of tiptoe in waist-rebound.

뜀틀(Long Horse)의 技術變遷에 따른 演技內容에 關한 考察 : centering around the Montreal Olympics

申榮吉 慶北大學校 1979 論文集 Vol.27 No.-

The summary of surveying and analyzing the tendency to perform the Long Horse is as follows: Of 100 male players, 76 of them were reported to perform such gymnasic maneuvers as the Hand Spring Salto (style A), the Hand Spring with Full Turn, the Tsukahara Vault (style B), and the Kasamatsu Vault. The Kasamatsu Vault especially received recognition as the best technique. In case of female players, they generally performed no more than three kinds such as the 1/2 Turn Back Somersault (style A,B), the Hand Spring with a Full Turn, the Hand Spring Salto (style A,B). This was well displayed by Nelly Kim, a USSR somersaultist, as she performed the 1/2Turn to Back Somersault with a Full Turn in a new mode. In case of Korea, it was found in the competition for selecting national representative players that the Tsukahara Vault(style A,B), the Hand Spring Salto were generally used by male players who participated in it, and that the 1/2Turn to Back Somersault, the Tsukahara Vault, the Yamashita Vault, the Hand Spring with a Full Turn were popular among female players.

Field Hockey경기에 있어서 Penalty Corner의 발생요인과 성공률 및 승패에 미치는 영향

신영길,강호석 慶北大學校 師範大學 體育學硏究會 1978 體育學會誌 Vol.4 No.-

鐵棒 뒤 공중돌아 내리기와 겹 공중돌아 내리기의 動作分析

申榮吉,康榮洙 慶北大學校 師範大學 體育學硏究會 1986 體育學會誌 Vol.14 No.-

This study in movement analysis as a result of have extracted the following conclusions. 1. It was disclosed that all subjects released the bar at almost some angle, Once back somersault was released angle 86°∼92°, and Twice back somersault at angle 85°∼86°. 2. It was disclosed that a performer would diminish the body angle of himself in order to speedily swing the second round than first while perporming twice back somersault. 3. The power which canthrust the trunk of a performer was originated when swinging speedily and having small shoulder angle as soon as release-the hands and this power can thrust the center of his weight. And by doing so, I think that the somersault can be nicely performed. 4. Somersault should have the power of thrusting feet while swinging because this power can originate other power which can originate other power which can perform second round. I belive that only round-speed accelerated by the falling power can round third or fourth somersault. 5. While once back somersault has much angle difference with angle 26°∼45° from the bar, twice back somersault perform first-round at almost same point as angle 32°∼34°. But the angle of second-round(O_3) has much difference with angle 32°∼4°. This fact, we think is the differentia of round-speed.

鐵棒 1回, 2回 및 3回 뒤공중돌아내리기의 比較 分析

申榮吉,金柄斗,安禹洪,金正子,吳東燮,朴宇奎 慶北大學校 體育科學硏究所 1987 체육과학연구지 Vol.3 No.-

The purpose of this study was to offer gymnasts data for successfully performing triple back somersault dismount(TBSD) and for designing training programs to progress gymnasts to the advanced dismount skills from the horizontal bar through comparative analysis of selected biomechanical factors of single back somersault dismount(SBSD), double back somersault dismount(DBSD) and TBSD. The subjects employed were a total of 4 male middle and high school gymnasts aged between 15 and 16 years. A motion-picture camera, fliming at a nominal rate of 54 frames/s, was used to record the performance of subjects on each trial. This camera was placed at a distance of 15 m from the inward pole of horizontal bar with its optical axis at right angle to this pole. The results obtained are summarized as follows: The mean release angle was 80.5° for the SBSD, 77.3° for the DBSD and 71.3° for TBSD. There were significant differences between the SBSD and the TBSD(p<0.01), the DBSD and the TBSD(p<0.05) but no significant difference between the SBSD and the DBSD. The angular velocity at release was 4.533 ㎭/s for the SBSD, 5.338 ㎭/s for the DBSD and 6.020 ㎭/s for the TBSD. There was a significant difference among these velocities(p<0.05, p<0.01). The linear velocity at release was 5.458m/s for the SBSD, 5.750m/s for the DBSD and 6.083m/s for the TBSD. In this case, we had a significant difference only between the SBSD and the other two somersaults(p<0.05, p<0.01). The shoulder angle at release was 170.5° for the SBSD, 167.0° for the DBSD and 154.3° for the TBSD. There were significant differences between the SBSD and the TBSD(p<0.05), the DBSD and the TBSD(p<0.05) but no significant difference between the DBSD and the TBSD. The hip and knee angle at release were increased respectively by increasing the number of somersault but showed no significant difference among these angles. The mean flight time from release to landing for each somersault was calculated; it took the subjects 1.315s to perform the SBSD, 1.345s to perform the DBSD and 1.416s to perform the TBSD. There was a significant difference among these somersaults with respect to time(p<0.05, p<0.01). The mean maximum height was 3,633m for the SBSD, 3,720m for the DBSD and 3,780m for the TBSD. There was a significant difference only between the SBSD and the other two somersaults. The mean horizontal distance was decreased respectively by increasing the number of somersault but showed no significant difference among these somersaults with respect to distance. The smallest hip angle during flight in the SBSD was 115.3° at 0.317s after the subject left the bar, for the DBSD it was 48.2° at 0.621s while that of the TBSD was 32.3° at 1,102s after release. The relationship between the time the smallest hip angle observed and the total flight time was determined; it took 24.1% of the total flight time of the SBSD to reach the smallest hip angle. In the DBSD, it took 46.2% of the total flight time to reach for the smallest hip angle and in the TBSD 77.8% of the total flight time to reach the smallest hip angle. From the above results, the gymnast would need to (1) increase angular velocity before release by manipulating of body shape, (2) change the release angle and (3) stay tuck position longer by shortening as quickly as possible the angle of each body joint to perform successfully the TBSD. Also to be able to perform quadruple back somersault dismount, a gymnast would need flight time of a minimum 1,782s.

韓國 近代體操의 發達과 그 內容的 推移 : 形式體操時代를 中心으로 Focus on Formal Gymnastics Period

申榮吉,孫俊丘 慶北大學校 師範大學 1991 敎育硏究誌 Vol.33 No.-

The purpose of this research is to grasp the development and content shift of modern Korean gymnastics in formal period from 1895 to 1927. The results are as follows : a) Though some schools adopted gymnastics, in preparations to receive, as a school subject in Educational system period, concrete gymnastics activities were not presented enough. b) In school ordinance period gymnastics was a compulsory subject in most of schools and various kind of activities were shown to nurture physical strength. c) In Korea school ordinance period gymnastics didn't advance in its contents much more than those in school ordinance period. Gymnastics was a reflection of Japanese colonial educational policy and placed emphasis on the power of self-control rather than robust health. d) In Instruction syllabus period Swedish gymnastics was practiced and improved in quality. Gymnastics education came to have modern system, thereafter.