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여홍철 ( Hong Chul Yeo ) 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.
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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.
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윤희중(Hee Joong Yoon),여홍철(Hong Cheul Yeo),김태삼(Tae Sam Kim) 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.
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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.
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조혜민,오승언,여인권,Cho, Hye-Min,Oh, Sung-Un,Yeo, In-Kwon 한국통계학회 2007 응용통계연구 Vol.20 No.3
One of main aspects of time series analysis is to forecast future values of series based on values up to a given time. The prediction interval for future values is usually obtained under the normality assumption. When the assumption is seriously violated, a transformation of data may permit the valid use of the normal theory. We investigate the prediction problem for future values in the original scale when transformations are applied in ARMA models. In this paper, we introduce the methodology based on Yeo-Johnson transformation to solve the problem of skewed data whose modelling is relatively difficult in the analysis of time series. Simulation studies show that the coverage probabilities of proposed intervals are closer to the nominal level than those of usual intervals.
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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*
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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.
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변환-역변환을 통한 자기회귀이동평균모형에서의 예측값 추정
여인권,조혜민,Yeo, In-Kwon,Cho, Hye-Min 한국통계학회 2008 응용통계연구 Vol.21 No.3
One of main goals of time series analysis is to estimate prediction of future values. In this paper, we investigate the bias problem when the transformation and back- transformation approach is applied in ARMA models and introduce a modified smearing estimation to reduce the bias. An empirical study on the returns of KOSDAQ index via Yeo-Johnson transformation was executed to compare the performance of existing methods and proposed methods and showed that proposed approaches provide a bias-reduced estimation of the prediction value.
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