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      • KCI등재후보

        도마 Yeo동작에 대한 운동학적 요인 분석

        여홍철 한국운동역학회 2003 한국운동역학회지 Vol.13 No.1

        Yeo, H-C. Kinematic Analysis of Yeo Motion at Horse vaulting. Korean Journal of Sport Biomechanics, Vol. 13, No. 1, pp. 39-50. The purpose of this experiment was to find out the stages of result of specific character for Horse Vaulting Yeo motion To put the Yeo movement in process, we needed a gymnastics athlete C height of 165cm, weight of 62kg, age of 32, personal history of 21 years, and tested the athlete 5 times of motion training, and picked out the 2 best motion and analyzed it. Athletic reason is vertical motion, time uses, horizontal motion, distance, speed, and analyzed many other reasons as a result, and finally ended up with this conclusion. 1. After the take off on the board horizontal speed gradually decreased However, reverse of that, it showed that vertical speed increased. 2. While contacting the Horse Vaulting horizontal speed decreased and vertical speed kept on increasing. Taking off from the Horse Vaulting horizontal, showing short time of training, 3m vertical height is shown after using Yeo motion at the peak of second fly jump. 3. While contacting Horse Vaulting, both arms were showing the flection shape Especially this is also while contacting Horse Vaulting, left arm was showing 90˚angle, and this has happened between the process of transition period of fast horizontal speed to vertical speed. 4. While contacting Horse Vaulting, perfect blocking of the left arm must be complete for the right arm to have the perfect blocking as well.

      • 구형도마와 신형도마에서 Yeo2동작의 운동학적 변인의 비교 분석

        여홍철,김윤지 한국스포츠리서치 2005 한국 스포츠 리서치 Vol.16 No.2

        The purpose of this study was to examine the difference between Yeo2 with old model vault and Lu Bin with new model vault by three dimensional image analysis method. From this analysis, I arrived at the following conclusions. 1. Lu Bin with new model vault took longer phase time and higher peak-height comparing to Yeo with old model vault. 2. The horizontal and vertical velocity of the old model vault was similar to the new model vault at tine time of touching down and taking off the board. The Lu's hip and shoulder joint angles were bigger than the Yeo's at the time of touching down and taking off the board.

      • KCI등재

        도마 Yeo2동작에 대한 운동학적 요인 분석

        윤희중,여홍철,김태삼 한국운동역학회 2001 한국운동역학회지 Vol.11 No.1

        The purpose of this study was to investigate the effect of the kinematic factors about event of the Yeo2 motion on the Horse Vault. The subject in this study was 1 male gymnast to performance Yeo2 motion. Two video cameras were used to attain kinematic variables by phase. As a result, the following conclusion was drawn; 1. As the take-off time on the board was short, it appeared to increase horizontal and vertical velocity. In the motion, the flight apex height increased largely, too. 2. As the contact time on the board was short, it appeared to performance the air motion smoothly by increasing the horizontal distance and apex height. 3. The horizontal and vertical velocity in take-off on the board appeared increase horizontal distance and apex height. 4. To increase the apex height and horizontal distance, the body appeared to must be take the posture of vertical axis in take-off on the board.

      • KCI등재

        Statistical Interpretation of Economic Bubbles

        Yeo, In-Kwon 한국통계학회 2012 응용통계연구 Vol.25 No.6

        In this paper, we propose a statistic to measure investor sentiment. It is a usual phenomenon that an asymmetric volatility (referred to as the leverage effect) is observed in financial time series and is more sensitive to bad news rather than good news. In a bubble state, investors tend to continuously speculate on financial instruments because of optimism about the future; subsequently, prices tend to abnormally increase for a long time. Estimators of the transformation parameter and the skewness based on Yeo-Johnson transformed GARCH models are employed to check whether a bubble or abnormality exist. We verify the appropriacy of the proposed interpretation through analyses of KOSPI and NIKKEI.

      • KCI등재

        Business : Economics ; Statistical Interpretation of Economic Bubbles

        ( In Kwon Yeo ) 한국통계학회 2012 응용통계연구 Vol.25 No.6

        In this paper, we propose a statistic to measure investor sentiment. It is a usual phenomenon that an asymmetric volatility (referred to as the leverage effect) is observed in financial time series and is more sensitive to bad news rather than good news. In a bubble state, investors tend to continuously speculate on financial instruments because of optimism about the future; subsequently, prices tend to abnormally increase for a long time. Estimators of the transformation parameter and the skewness based on Yeo-Johnson transformed GARCH models are employed to check whether a bubble or abnormality exist. We verify the appropriacy of the proposed interpretation through analyses of KOSPI and NIKKEI.

      • KCI등재

        Biological roles of cytochrome P450 1A1, 1A2, and 1B1 enzymes

        Yeo‑Jung Kwon,Sangyun Shin,Young‑Jin Chun 대한약학회 2021 Archives of Pharmacal Research Vol.44 No.1

        Human cytochrome P450 enzymes (CYPs) playa critical role in various biological processes and human diseases. CYP1 family members, including CYP1A1, CYP1A2,and CYP1B1, are induced by aryl hydrocarbon receptors(AhRs). The binding of ligands such as polycyclic aromatichydrocarbons activates the AhRs, which are involved in themetabolism (including oxidation) of various endogenousor exogenous substrates. The ligands that induce CYP1expression are reported to be carcinogenic xenobiotics. Hence, CYP1 enzymes are correlated with the pathogenesisof cancers. Various endogenous substrates are involvedin the metabolism of steroid hormones, eicosanoids, andother biological molecules that mediate the pathogenesisof several human diseases. Additionally, CYP1s metabolizeand activate/inactivate therapeutic drugs, especially, anticanceragents. As the metabolism of drugs determines theirtherapeutic efficacy, CYP1s can determine the susceptibilityof patients to some drugs. Thus, understanding the role ofCYP1s in diseases and establishing novel and efficient therapeuticstrategies based on CYP1s have piqued the interest ofthe scientific community.

      • KCI등재후보

        Protective Effects of N-acetylcystenine and Selenium against Doxorubicin Toxicity in Rats

        Yeo-sung Yoon,Sun-don Kim,Min-hye Lee,Heung-shik S.Lee,In-se Lee,Je-kyung Sung,Eun-sung Park 대한수의학회 2003 JOURNAL OF VETERINARY SCIENCE Vol.4 No.2

        Effects of N-acetylcysteine and Selenium against Doxorubicin Toxicity in RatsEun-sung Park, Sun-don Kim1, Min-hye Lee, Heung-shik S. Lee, In-se Lee, Je-kyung Sung and Yeo-sung Yoon*

      • KCI우수등재
      • Development of Environmental Education Programmes on Trees and Forests

        Youn, Yeo-Chang 서울대학교 농업개발연구소 2000 농업생명과학연구 Vol.4 No.-

        This research was carried out as a UNDP national project (Project number ROK/98/005 project period 1998.9-2000.12). The project was formulated and carried out by the direction of Professor Yeo-Chang YOUN with the following objectives: 1) Improvement of understanding on the present status of environmental education on trees and forests 2) Development of the programs of environmental education on trees and forests 3) Development of the self-guiding programs of environmental education on trees and forests 4) Development of the guidebook of environmental education on trees and forests 5) Establishment of communication networks for teachers, operators, and related groups.

      • 亂流解析을 위한 Closure 모델에 關한 硏究

        呂運光 명지대학교 공학기술연구소 1988 공학기술연구소 논문집 Vol.3 No.-

        The various types of turbulence models are presented. The necessity of the averaging procedure is stated in view of the spectral characteristics in turbulence structures. This paper includes the primary difference between the ensemble and the volume average methods, in which terms requiring closure are derived and analyzed. The basic concept of the eddy viscosity and diffusivity for the closure terms is reviewed, based upon the mixing length model, the one-equation model and the general two-equation model. The turbulent stress/flux equation model is also considered algebraically. Special attention is placed upon the introduction of the Yeo's averaging procedure totally different from the conventional approaches in turbulence modeling. This paper concludes with the discussion and the comparison of them above.

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