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.

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.

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.

변환-역변환을 통한 자기회귀이동평균모형에서의 예측값 추정

여인권,조혜민,Yeo, In-Kwon,Cho, Hye-Min 한국통계학회 2008 응용통계연구 Vol.21 No.3

시계열자료 분석에 있어 주요 목적 중에 하나는 미래에 대한 예측 값을 추정하는 것이다. 이 논문에서는 정상자기회귀이동평균 모형에서 변환-역변환 방법을 이용하여 예측값을 구하는 과정에서 발생하는 문제에 대해 알아보고 회귀분석에서 제안되었던 smearing 추정방법을 시계열분석에서 사용할 수 있도록 붓스트랩을 이용하여 수정한 추정법을 소개한다. Yeo-Johnson 변환 (2000)을 이용한 KOSDAQ지수의 수익률 실증분석을 통해 기존에 사용되고 있는 방법의 문제점과 제안된 방법의 적절성에 대해 고찰해 보았다. 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.

변환된 자기회귀이동평균 모형에서의 예측구간추정

조혜민,오승언,여인권,Cho, Hye-Min,Oh, Sung-Un,Yeo, In-Kwon 한국통계학회 2007 응용통계연구 Vol.20 No.3

시계열자료를 분석하는데 있어 중요한 목적 중에 하나가 미래값에 대한 예측이다. 일반적으로 자기회귀이동평균모형에서는 백색잡음이 정규분포를 따른다는 가정 하에서 모수의 추론과 예측 및 예측구간의 추정이 이루어지고 있다. 그러나 자료가 이러한 가정을 만족하지 않는 경우, 자료를 가정에 맞게 변환시킨 후 분석하는 방법을 생각해 볼 수 있다. 이 논문에서는 변환된 자료를 분석하여 얻은 결과를 이용하여 본래의 척도에서의 미래값에 대한 예측구간을 추정하는 문제에 대해 알아본다. 제안하는 방법에서는 먼저 적절한 변환을 이용하여 자료를 정규가정을 만족하도록 변환시키고 변환된 자료를 이용하여 미래값에 대한 예측구간을 추정한 후, 역변환을 이용하여 예측구간을 추정한다. 이 논문에서는 시계열분석에서 모델링이 상대적으로 어려운 왜도의 문제를 해결하기 위해 Yeo-Johnson 변환을 중심으로 한 방법론을 소개한다. 모의실험 결과 제안된 방법에 의한 단측예측구간의 포함확률이 변환을 사용하지 않은 구간보다 명목수준에 가까운 것을 확인하였다. 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.

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*

Syntax in Favor of Lexicon: A Case for Korean Nominals

Yeo,Seungju 한국언어학회 2010 언어 Vol.35 No.1

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.