비선형 최적화문제의 해결을 위한 개선된 유전알고리즘의 연구

우병훈,하정진 한국경영과학회 1996 經營 科學 Vol.13 No.1

Genetic Algorithms have been successfully applied to various problems (for example, engineering design problems with a mix of continuous, integer and discrete design variables) that could not have been readily solved with traditional computational techniques. But, several problems for which conventional Genetic Algorithms are ill defined are premature convergence of solution and application of exterior penalty function. Therefore, we developed an Improved Genetic Algorithms(IGAs) to solve above two problems. As a case study, IGAs is applied to several nonlinear optimization problems and it is proved that this algorithm is very useful and efficient in comparison with traditional methods and conventional Genetic Algorithm.

IMT-2000을 위한 레이크 수신기의 BER 성능

우병훈,백승선,강희조 보안공학연구지원센터 2005 보안공학연구논문지 Vol.2 No.1

STTD 수신기를 채용한 이동 멀티미디어 통신 시스템의 성능개선에 관한 연구

우병훈,이양선,강희조 보안공학연구지원센터 2005 보안공학연구논문지 Vol.2 No.1

골프 입문자들의 유효타에 대한 성공요인 분석

우병훈 한국응용과학기술학회 2020 한국응용과학기술학회지 Vol.37 No.5

본 연구의 목적은 골프 입문자들을 대상으로 12주간 훈련을 통하여 수행한 스윙에서 유효타에 미치는 변인들을 분석하고, 이를 통하여 골프 입문자들의 페어웨이 안착을 위한 유효타 요인의 기초자료를 제공하고자 한다. 본 연구의 대상은 골프 경험이 없는 입문자로 대학생 20명이 연구에 참여하였다(연령: 21.35±1.69yrs, 신장: 176.75±7.99cm, 체중: 70.70±9.76kg). 모든 대상자에게 12주간 골프 지도법에 따른 프로그램을 실시하였고, 12주차에 트랙맨 4를 이용하여 골프 스윙 시 유효타에 미치는 변인들을 산출하 였다. 트랙맨 자료는 클럽 변인과 볼 변인으로 구분하여 유효타에 영향을 미치는 변인을 알아보기 위하여 이분형 로지스틱 회귀분석을 실시하였다. 클럽 변인에서 높은 다이나믹로프트(p<.01)와 낮은 페이스앵글 (p<.05)은 유효타에서 나타났고, 볼 변인에서 빠른 볼스피드(p<.01), 큰 스매시팩터(p<.001), 높은 런치앵 글(p<.001), 많은 스핀레이트(p<.001)도 유효타에서 나타났다. 클럽 변인의 이분형 로지스틱 회귀분석 결과, 클럽스피드(p<.05)와 다이나믹로프트(p<.01)가 증가하면 유효타의 가능성이 증가하였고, 페이스앵글 (p<.001)이 증가하면 유효타의 가능성이 감소하였다. 클럽 변인에서 유효타의 영향력은 다이나믹로프트, 페이스앵글, 클럽스피드 순으로 나타났다. 볼 변인에서는 런치앵글(p<.05)이 증가하면 유효타의 가능성이 증가하였고, 런치디렉션(p<.05)이 증가하면 유효타의 가능성이 감소하였다. 볼 변인에서 유효타의 영향력은 런치앵글, 런치디렉션 순으로 나타났다. 결과를 토대로 유효타의 확률을 증가시키기 위한 조건으로, 지속적인 연습을 통하여 스윙 시 높은 다이나믹로프트와 낮은 페이스앵글 구사를 통한 클럽스피드 증가가 필요하고, 이를 통하여 런치앵글 증가와 런치디렉션 감소를 통하여 유효타의 확률이 증가될 것으로 사료된다. The purpose of this study is to analyze the variables affecting the effective stroke in the swing performed through 12 weeks of training for golf beginners, and to provide basic data on the effective stroke factors for the golf beginners to settle on the fairway. Twenty subjects were participate in the study (age: 21.35±1.69 yrs, height: 176.75±7.99 cm, weight: 70.70±9.76 kg). All subjects were subjected to a 12-week golf training, and trackman 4 was used in the 12th week to calculate variables affecting the effective stroke during a golf swing. Trackman data was divided into club-variables and ball-variables, and a binary logistic regression analysis was performed to find out the variables affecting effective strokes. In club-variables, high dynamic loft and low face angles were found in effective stroke, and in ball-variables, fast ball speed, large smash factor, high launch angle, and many spin rates were also found in effective stroke. As a result of the binary logistic regression analysis of club-variables, the probability of an effective stroke increased as the club speed and dynamic loft increased, and the probability of an effective stroke decreased as the face angle increased. The influence of effective stroke in the club-variables was in the order of dynamic loft, face angle, and club speed. In the ball-variable, the probability of an effective stroke increased when the lunch angle increased, and the probability of an effective stroke decreased as the lunch direction increased. As a condition to increase the probability of effective stroke based on the results, it is necessary to increase the club speed through high dynamic loft and low face angle during swing through continuous practice. Through this, the probability of effective stroke through increasing the launch angle and decreasing the launch direction will increase.

위성항법시스템(GNSS)의 기술 현황과 산업 동향 분석

우병훈,백승선,문용규,U, Byeong-Hun,Baek, Seung-Seon,Mun, Yong-Gyu 한국정보통신학회 2005 한국정보통신학회지 Vol.6 No.2

우세발에 따른 Y-Balance Test시 지지발의 COP 비교 분석

우병훈 한국체육교육학회 2023 한국체육교육학회지 Vol.28 No.5

Purpose: The purpose of this study was to compare composite scores on dominant foot using YBT and to investigate the effect on dynamic balance by comparing and analyzing the difference in COP of supporting foot on dominant foot during YBT. Methods: 26 male university students in their 20s participated in the experiment, and left and right dominant foot groups were selected through foot preference index(FPI). To measure dynamic balance, Y-Balance Test(YBT) was used, and composite score of YBT on dominant foot and COP variables of the supporting foot were calculated, and difference in COP variables of left and right supporting feet on dominant foot was repeatedly measured. It was verified through ANOVA Results: There was no difference in the YBT composite score depending on the dominant foot. When reaching anterior in YBT, right foot dominant has a smaller ML amplitude when supporting left foot, left foot dominant has a slower AP and ML COP velocity when supporting right foot, and when supporting right foot, and velocity of left dominant foot appeared slower when supporting right foot, so when opposite foot of dominant foot was support foot, dynamic balance increased. When reaching posteromedial, AP amplitude was small depending on the supporting foot when supporting right foot, and AP and ML COP velocity also appeared slower when supporting right foot, so dynamic balance increased when supporting right foot. When reaching posterolaterally, AP and ML amplitudes depending on supporting foot were small when supporting right foot, and AP COP velocity was also slow when supporting right foot, so dynamic balance increased when supporting right foot. Conclusion: The supporting role of non-dominant foot was important in YBT anterior reaching, and especially at AP COP velocity, it will be helpful in maintaining dynamic balance when supporting right foot in all the anterior, posteromedial, and posterolateral directions.

연속 회전점프 시 시각선택과 회전순서가 도약과 착지에 미치는 영향

우병훈 한국응용과학기술학회 2022 한국응용과학기술학회지 Vol.39 No.5

The purpose of this study was to compare the differences according to the visual selection and rotation order during sequential rotational jump for female dancers of a Korean ballet company by classifying them into take-off and landing sections. 10 subjects (age: 26.0±2.9 yrs, height: 163.4±3.3 cm, weight: 46.8±3.6 kg, ballet career: 12.3±5.9 yrs) participated in the study. Using a 3D motion analyzer and a force platform, the height of the body center and the ground reaction force during take-off and landing were measured. According to the visual condition (using both eyes, using left eye, using right eye) and rotation order (first rotation, second rotation), it was analyzed through repeated measurement two-way analysis. Height of the CM was higher in the first jump. In take-off, Fx was lateral force of left foot and medial force of right foot were strong in second rotation, and Fy was forward force was strong in first rotation of right foot. Fz was no significant. In landing, Fy showed backward force was strong when landing the second time from the left foot, and the backward force was strong when using the left sight from the right foot. Fz was strong on the second landing on the left foot and the first landing on the right foot. 본 연구의 목적은 국내 발레단 소속 여자 무용수를 대상으로 연속 회전점프 시 시각선택과 회전순서에 따른 차이를 도약과 착지구간으로 분류하여 비교하였다. 10명의 대상자(연령: 26.0±2.9 yrs, 신장: 163.4±3.3 cm, 체중: 46.8±3.6 kg, 발레경력: 12.3±5.9 yrs)가 연구에 참여하였다. 3차원 동작분석기와지면반력기를 이용하여 신체중심의 높이와 도약과 착지 시 지면반력을 측정하였다. 시각선택(양눈 사용, 왼눈 사용, 오른눈 사용)과 회전순서(첫번째 회전점프, 두 번째 회전점프)에 따른 차이를 반복측정 이원변량분석을 통하여 분석하였다. 신체중심의 높이는 첫 번째 회전점프가 높게 나타났다. 도약 시 지면반력의 좌우힘은 좌우발 모두 두 번째 회전점프에서 왼발은 외측힘, 오른발은 내측힘이 강하게 나타났고, 전후힘은오른발에서 첫 번째 회전점프 시 전방힘이 강하게 나타났으며, 수직힘은 좌우발 모두 차이가 없었다. 착지시 전후힘은 왼발에서 두 번째 착지에서 후방힘이 강하게 나타났고, 오른발은 왼쪽 시각 사용에서 후방힘이 강하게 나타났다. 수직힘은 왼발에서 두 번째 착지, 오른발은 첫 번째 착지에서 강하게 나타났다.

아우구스티누스의 성경주석법과 설교론

우병훈 고신신학회 2019 고신신학 Vol.- No.21

아우구스티누스의 성경주석법과 설교론

골프스윙 시 지면반력 크기와 시간 차이가 클럽헤드 속도에 미치는 영향

우병훈 한국운동역학회 2020 한국운동역학회지 Vol.30 No.1

Objective: The purpose of this study was to investigate the influence of clubhead velocity through regression analysis on the magnitude and time difference of the forward-backward, medio-lateral, and vertical ground reaction peak forces generated by force plate during golf swing. Method: 16 subjects (age: 20.5±4.2 yrs, height: 176.0±5.4 cm, weight: 77.8±5.9 kg, handy: 2.4±1.7) who is elite golf player in high school and university, participated in this study. The study method adopted three-dimensional analysis with 8 cameras and ground reaction force measurement with two force plate. The analysis variables were clubhead velocity, and ground reaction analysis variables set four events in each graph based on the peak forces commonly generated in Fx, Fy, and Fz graphs of the ground reaction data during the golf swing. Results: As a result of analyzing the influence of ground reaction magnitude difference on clubhead velocity, the influence on clubhead velocity was ym4, zm1, xm4, zm2. The larger ym4, xm4, zm1, the faster the clubhead velocity, but the smaller the zm2, the faster the clubhead velocity. And in time difference, the influence on the clubhead velocity was in the order of xt4, zt1, zt3. The shorter xt4, zt1, zt3 showed faster clubhead velocity. Conclusion: The left foot played a leading role in increasing the velocity of the clubhead. Although the result was caused by the interaction of the right foot and the left foot during the swing, the role of the left foot is relatively large.

노회의 기원과 역할

우병훈 고신신학회 2018 고신신학 Vol.- No.-

노회의 기원과 역할