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RISS 인기검색어
- 검색키워드
- 저자 : 조성원(Sung-Won Jo) (검색결과 28 건)
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확산텐서 트랙토그래피에서 Vector Correlation Function를 적용한 신경다발추적에 관한 연구
조성원,한봉수,박인성,김성희,김동윤,Jo, Sung Won,Han, Bong Su,Park, In Sung,Kim, Sung Hee,Kim, Dong Youn 한국의학물리학회 2007 의학물리 Vol.18 No.4
Line propagation과 Brute force approach를 기반으로 한 확산텐서 트랙토그래피에서 신경다발추적을 위한 시작점을 선택하기 위한 조건으로 기존에 사용하는 Fractional anisotropy (FA)값 이외에 vector correlation function (VCF)를 제안하여 트랙토그래피를 구현하였다. 뇌전체의 트랙토그래피에 대하여, 본 연구에서 제안한 VCF를 사용할 경우 FA가 0.3 이상인 경우에 백질 외 영역에서 41% 적은 시작점을 사용하여 백질 외의 신경섬유가 아닌 부분들이 제거된 결과를 얻었다. 또한 관심영역에 대한 피질척수로의 영상에서는 백질 내에서는 50% 적은 시작점을 사용하였으나 기존기법과 매우 유사한 결과를 얻었다. Diffusion tensor tractorgraphy which is based on line propagation method with brute force approach is implemented and the vector correlation function is proposed in addition to the conventional fractional anisotrophy value as a criterion to select seed points. For the whole tractography, the proposed method used 41 % less seed points than the conventional brute force approach for $FA{\geq}0.3$ and most of the fiber tracks in the outer region of white matter were removed. For the corticospinal tract passing through region of interest, the proposed method has produced similar results with 50% less seed points than conventional one.
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도기현 ( Ki Hyun Do ),원영신 ( Young Shin Won ),조성원 ( Sung Won Jo ) 대한무도학회 2013 대한무도학회지 Vol.15 No.3
택견으로 마을과 마을이 편을 갈라 마을의 명예를 걸고 한바탕 겨루어 보는 것을 ``결련택견``이라고 하는데 택견의 단체전이라는 단순한 의미를 넘어 우리문화의 많은 특성을 보여주는 소중한 문화유산이다. 타격투기에서는 찾기 어려운 단체전 격투기 스포츠 종목인 결련택견의 특성을 파악하여 그 속에 내재된 우리나라의 문화적 특성을 살펴보고자 하는 것이 본 연구의 목적이다. 결련택견의 문화적 특성에 대한 연구결과는 다음과 같다. 첫째, 결련택견은 격투기 스포츠 중에서 매우 드물게 열린 공간인 야외 마당에서 단체전으로 행해지고 있었다. 둘째, 결련택견은 누구나가 쉽게 참가하고 관람할 수 있으며 선수와 관중이 다른 격투기 스포츠와는 달리 매우 밀착되어 있는 것으로 나타났다. 셋째, 경기규칙이 단순하기에 누구나가 쉽게 참여할 수 있는 대중성과 간단한 규칙으로 인한 경기의 의외성이 연결되어 있었다. 넷째, 결련택견에서의 승자는 계속해서 경기에 임하는 연승제이므로 영원한 승자가 있을 수 없으며, 특히 연승제라는 규칙 안에서 출전선수의 차례가 정해져 있지 않고 상황에 따라 선수를 출전시키기 때문에 팀을 위한 희생이 필요한 구조를 가지고 있는 것으로 나타났다. 이는 강자와 약자의 명확한 구분보다는 팀을 위해 희생하고 함께 즐길 수 있는 대동단결의 구조로 되어 있다는 것을 보여주고 있었다. 다섯째, 특별한 보호구가 없이도 심각한 부상을 방지할 수 있는 경기규칙으로 안전성을 확보하고 있었으며, 공격기술의 제한을 통하여 상대선수를 보호할 수 있는 안전장치가 발달된 안전한 격투기 스포츠이다. 이러한 특성들은 인간 존중의 문화를 가지고 있는 우리문화의 한 단면을 잘 보여주고 있다. 마지막으로 경기 전후에 각 선수들이 독창적으로 선보이는 ``본때뵈기``와 같은 즉흥적 퍼포먼스는 개인의 강한 개성과 자유스러운 우리민족의 예술적 창의성을 잘 보여주고 있으며, 격투기임에도 풍류를 즐기는 우리 민족의 문화적 특성이 담겨있다. 한바탕 힘과 기예를 겨루면서도 서로를 존중하고, ``우리``를 강조하며 단결을 중요시하는 결련택견은 우리의 문화이기에 무조건 소중하다는 국수주의적인 사고가 아니라 21세기 스포츠계에 새로운 패러다임을 보여줄 수 있다는 점에서 매우 가치가 높은 우리민족의 자랑스러운 문화유산이라 할 수 있다. Taekkyeon is the only Korean martial art to be designated as a Korean national treasure (no. 76). Long ago in Korea Taekkyeon competitions were held between towns. However, these competitions were about more than just winning. These Taekkyeon teams fought for the pride and honor of their towns. This style of Taekkyeon is know as ``Kyulyun Taekkyeon``. When observing Kyulyun Taekkyeon you are able to see more than just fighting. Watching Kyulyun Taekkyeon allows a person to glimpse various precious aspects of Korean culture and its people. The purpose of this study is to detail Korean culture as it is observed through Kyulyun Taekkyeon`s unique group fighting competitions. Kyulyun Taekkyeon competitions are a team sport, which embody three unique characteristics. First, Kyulyun Taekkyeon competitions are held outside in the open public. Second, the rules of a Kulyun Taekkyeon competition are easy, allowing anybody who wishes to compete or enthusiastically watch along. Third, due to Kyulyun Taekkyeon`s open friendly atmosphere, both Kyulyun Taekkyeon competitors and spectators can unite as one. In addition, Kyulyun Taekkyeon competitions can be enjoyed by people of all ages, both young and old. For this reason, Kylyun Taekyon helps to bring a towns people together. In a Kyulyun Taekkyeon competition a player continually fights until he loses. Therefore, in Kyulyun Taekkyeon there is no such thing as an undefeated champion. Additionally, due to the ordering of players in a Kyulyun Taekkyeon competition, sometimes a coach must strategically sacrifice one of his players in order to give his team a better chance of winning. In a Kyulyun Taekkyeon competition the sacrifice of a player for his team is as equally admired as the skill of a winning player. Due to the rules of a Kyulyun Taekkyeon competition players are limited in the techniques in which they can use. By limiting the techniques of a player Kyulyun Taekkyeon creates a safe, yet realistic sport. This can be seen to display Korea`s culture of respecting others. Finally, before a Kyulyun Taekkyeon competition players must showcase their skills in a special performance called a ``bontaebaegie``. Bontaebages can be seen to display Korean`s artistic talent. I am not insisting these things just because Kyulyun Taekkyeon is Korean, but instead because of Kyulyun Taekkyeon`s ability to revolutionize 21st century sports.
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다양한 웨이브 각도에서의 웨이브-슬릿 휜-관 열교환기의 열전달 및 유동 특성
조성원(Sung Won Jo),권정근(Gwon Jeong Geun),박용갑(Yong Gap Park),최훈기(Hoon-Ki Choi) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.05
This study numerically discusses heat transfer and flow characteristics of slit-wavy fin and tube hear exchangers with different wavy angles. A computational fluid dynamics (CFD) study was carried out using ANSYS 2020 R2 FLUENT. In this study, detailed analysis results for the Colburn j factor and Fanning friction factor ƒ were presented as volume-goodness factors G<sub>v</sub>. The effect of wavy-angles was discussed and consequently this parameter had a great influence upon the performance of the slit-wavy fin and tube heat exchangers.
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조성원(Jo, Sung-Won),박윤식(Park, Yoon-Shick) 한국체육과학회 2012 한국체육과학회지 Vol.21 No.5
The purpose of this study was to analyze the effect of class satisfaction on exercise adherence for female college students in cultural physical education between capital area and non-capital area. It searched for the factors which affect on those and provides basic materials on the cultural physical education and positive recognition to the attendees. This study represented a female students who were attending cultural physical education of four-year colleges located in capital and non-capital area. The subjects(N=323) were used for this study by convenience sampling method of nonprobability sampling. Frequency analysis, exploratory factor-analysis, reliability analysis, t-test, one way ANOVA, back-testing, correlation analysis, multiple regression analysis were tested by using SPSS 18.0 program. The results of this study were as follows: First, there were significant differences between capital area and non-capital area university in the class satisfaction and subcategory of evaluation of instruction and content of instruction. Second, class satisfaction had an effect on intention of exercise continuity of female students in cultural physical education.
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노인건강운동 지도자의 지도신념이 직무태도에 미치는 영향
조성원(Jo, Sung-Won),원영신(Won, Young-Shin),고대선(Ko, Dae-Sun) 한국체육과학회 2013 한국체육과학회지 Vol.22 No.2
The purpose of this study was to investigate the effect of teaching beliefs on job attitude in sport instructor for the aged. Survey data were collected from 300 sport instructor for the aged. Insincerely answered and 7 instructor’s missing surveyed with the exception of the 293 sport instructor for the aged, in fact analyst furnished data to 278 instructor’s. Collected data was analyzed by using SPSS 15.0 version for Window and reliability analysis, factor analysis, frequency analysis and independent sample t-test, one-way ANOVA were executed to examine research subject of this study. Scheffe method was used for after test analysis of one-way ANOVA and multiple regressions was performed after interrelation between value for profession and satisfaction rate on duty had been analyzed. The result of this study has been deduced through above progress as follows. First, there was a significant difference in teaching beliefs(maturity belief, action belief, interaction belief) of sport instructor for the aged by socio-demographic variables(age, education, teaching period, monthly income). Second, there was a significant difference in job attitude(physical job compensatory, change occupation propensity, job flow) of instructor’s by socio-demographic variables(sex, age, education, teaching period, monthly income). Third, teaching beliefs are an important factor to job attitude that has positive effects by action belief, interaction belief.
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조성원(Jo, Sung-Won),한경호(Han, Kyong-Ho) 한국전기전자학회 2010 전기전자학회논문지 Vol.14 No.4
본 논문에서는 카메라 등에 의한 영상정보에서 주행로의 환경에 의한 주행체의 전후 및 좌우로 기울어지는 자세 변화를 감지하는 방법을 제시한다. 주행체의 자세가 어떤 방향으로 기울게 되면 그에 따라 영상정보의 피사체 위치가 상하 또는 좌우로 기울어져 변화한다. 이는 사람이 평형기관 외에 시각에 의하여 자세 변화를 감지하고 그에 따라 반응하는 것과 같은 원리이다. 본 논문에서 제시한 방법은 카메라를 통하여 얻은 영상에서 영상정보뿐 아니라 부수적으로 자세변화 감지동작도 수행할 수 있음을 제시하였고 그 내용을 실험을 통하여 확인하였다. This paper handles, pitching and rolling posture change detection using the visual image changes due to the road slope conditions. When the moving vehicle is slanted to a direction, the objects in the visual images of the vehicle are moving to up or down and right or left. This is similar to the human's balancing behavior depending on the visual image change detection as well as the vestibular organs and semicircular canal in the ear. The proposes method shows the visual image through the camera can be used for the image information itself and for the posture change detection through the experiments.
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조성원(Sung-Won Jo),최훈기(Hoon-Ki Choi),박용갑(Yong-Gap Park) 한국기계가공학회 2022 한국기계가공학회지 Vol.21 No.11
The laminar mixed convection of a nanofluid consisting of water and Al₂O₃ in a horizontal curved tube was numerically studied. Three-dimensional elliptic governing equations were solved to show the manner in which nanoparticle concentration affects thermal and hydrodynamic parameters, which are impressed by centrifugal and buoyancy forces. The effects of nanoparticle volume concentration and the Richardson number on the velocity vector, temperature contour, convective heat transfer coefficient, and pressure drop are presented and discussed. The results showed that at a given Reynolds number, increasing the solid nanoparticle volume concentration and Richardson number increased the convective heat transfer coefficient. In addition, the pressure drop in the pipe significantly increased with an increase in nanoparticle volume concentration.
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