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사례기반추론기법을 이용한 선체 횡부재 구조설계 지식 표현 방법론 연구
윤덕영,양동열,차명석 朝鮮大學校 機械技術硏究所 1998 機械技術硏究 Vol.1 No.1
This paper shows the knowledge representation method for the possibility of the automation of the design and modeling of ship web frame in the level of detailed design using parametric design and case-based reasoning technique. It turns out that Case-Based Reasoning(CBR) based on casual model is successfully applied for the design automation.
차명석 ( Myoung Seok Cha ) 백석대학교 기독교인문학연구소(구 기독교철학연구소) 2009 기독교철학연구 Vol.11 No.-
The Korean church, which has experienced great change and growth unlike any other country in the history of Christianity, has entered the Twenty-first century alongside the rapidly changing and diverse modern cultures. Living in a time of technological advancement, pluralism, and postmodernism, modern people can not ignore popular culture. They experience conflicts, big and small, as they live within the ebb and flow of diverse cultures. Our modern culture has deeply influenced the growth and development of Korean worship and hymns. In the Twenty- first century Korean church, CCM praise and worship has secured its place as the dominating and most popular style of praise. After a long period of labor and suffering, the Korean Hymnal Assembly was finally able to publish, in 2007, the Twenty-first Century Hymnal, which has become the most popular standardized hymnal book. However, the Korean church will have to adapt the Twenty-first Century Hymnal, which is used in traditional worship settings, to new and diverse worship cultures and styles of praise in ways that will meet the demands of contemporary culture. This dissertation suggests as a plan the incorporation of Descant into congregational hymns used in traditional worship in order to produce a new kind of church music that fits the modern taste. The following is the order in which the research for this paper is organized. First, I have done literary research for the etymology and history of Descant. Second, there is an analysis of Descant hymns and creation of new ones. The following are Descant hymns that are already published: Woon-Young Na`s 100 Descant Hymns(1976), Sook-Ja Jo` Descant Hymnal(1991), Sun-Yong Baek`s Descant Hymnal(1999), Gwang-Woo Chun and Tae-Seung Jang`s Descant Hymnal for Spiritual Worship(2002), and Hye-Chun Song`s Descant Hymnal(2004). However, there are very few churches that actually use these Descant hymns for their worship services. Therefore, this paper has analyzed the reason why churches have neglected the use of Descant hymns and has presented a form of Descant hymns that can be widely used among churches. If churches accept the use of Descant hymns in their traditional worship services, I believe that it will open up a new way of doing church music. I hope that many simple Descant hymns will be produced and that there will be a flourishing of Descant Hymnals. The Korean church and church music leaders will have to show continual effort and devotion to the research and development of worship music and congregational hymns.
복합판재의 파단 변형률 불확실성을 고려한 탄 관통 잔류속도에 대한 시험 및 수치해석
차명석(Myungseok Cha),이민형(Minhyung Lee) 대한기계학회 2016 大韓機械學會論文集A Vol.40 No.3
복합재는 재료 불균질성에 의해 고속 충돌 시 방호성능 자료가 산포한다. 본 연구에서는 다수의 충돌시험으로 복합판재 잔류속도 산포를 확보하고 수치해석으로 예측하는 방법을 정립하였다. 먼저 10개의 동일 시편으로 인장시험을 수행하여 파단변형률 산포를 얻었다. 같은 재료로 제작된 4ply([0/90]s)와 8ply([0/90/0/90]s) GFRP(Glass Fiber Reinforced Plastic) 복합판재에 FSP(Fragment Simulating Projectile) 고속 충돌시험을 동일 조건에서 다수 수행하여 잔류속도 산포를 얻었다. 인장시험에서 얻어진 파단 변형률 분포를 이용하여 수치해석을 수행하였다. 충돌속도는 4ply와 8ply 각각 411.7m/s와 592.5m/s이다. 시험 결과와 비교하여 적절한 잔류속도의 산포를 예측할 수 있었다. 추가적으로 복합판재의 경우 Solid요소 대비 Layered Solid요소로 모델링하면 계산시간이 감소되었다. The ballistic performance data of composite materials is distributed due to material inhomogeneity. In this paper, the uncertainty in residual velocity is obtained experimentally, and a method of predicting it is established numerically for the high-speed impact of a bullet into laminated composites. First, the failure strain distribution was obtained by conducting a tensile test using 10 specimens. Next, a ballistic impact test was carried out for the impact of a fragment-simulating projectile (FSP) bullet with 4ply ([0/90]s) and 8ply ([0/90/0/90]s) glass fiber reinforced plastic (GFRP) plates. Eighteen shots were made at the same impact velocity and the residual velocities were obtained. Finally, simulations were conducted to predict the residual velocities by using the failure strain distributions that were obtained from the tensile test. For this simulation, two impact velocities were chosen at 411.7m/s (4ply) and 592.5m/s (8ply). The simulation results show that the predicted residual velocities are in close agreement with test results. Additionally, the modeling of a composite plate with layered solid elements requires less calculation time than modeling with solid elements.
사례기반추론기법을 이용한 bulk carrier의 선체 횡부재 구조설계 전문가 시스템 개발에 관한 연구
윤덕영(Duck-Young Yoon),차명석(Myeong-Seok Cha) 한국해양공학회 1998 韓國海洋工學會誌 Vol.12 No.4
This paper shows the knowledge representation method for the possibility of the automation of the design and modeling of ship web frame in the level of detailed design using parametric design and case-based reasoning technique. It turns out that Case-Based Reasoning(CBR) based on casual model is successfully applied for the design automation.
박충식(Choong-Shik Park),김재홍(Jae-Hong Kim),이봉근(Bong-Keun Lee),구민정(Min-Jeong Koo),장세인(Se-In Jang),이한림(Han-Lim Lee),김광백(Kwang-Baek Kim),강현석(Hyun-Seuk Kang),차명석(Myoung-Seok Cha) 한국컴퓨터정보학회 2009 한국컴퓨터정보학회 학술발표논문집 Vol.16 No.2
본 논문은 복도 영상에서 소실점만으로 방향을 판단하여 주행하는 방법을 제시한다. 허프 변환을 이용하여 추출된 선 성분으로 소실점을 구하고 다양한 경우를 고려하여 회전과 주행 방향을 판단한다. 제안된 방법으로 전동 휠체어를 이용하여 자율 주행을 확인하였다.