고에너지 전자선의 방사선 치료 기술

서명원,박재일,최홍식,김우열,SUH M.W.,PARK J.I.,CHOI H.S.,KIM W.Y. 대한방사선치료학회 1985 大韓放射線治療技術學會誌 Vol.1 No.1

High energy electron beams took effect for tumor radio-therapy, however, had a lot of problems in clinical application because of various conversion factors and complication of physical reactions. Therefore, we had experimentally studied the important properties of high energy electron beams from the linear accelerator, LMR-13, installed in Yonsei Cancer Center. The results of experimental studies on the problems in the 8, 10, 12 Mev electron beam therapy were reported as following. 1. On the measurements of the outputs and absorbed does, the ionization type dosimeters that had calibrated by $^{90}Sr$ standard source were suitable as under $3\%$ errors for high energy electrons to measure, but measuring doses in small field sizes and the regions of rapid fall off dose with ionization chambers were difficult. 2. The electron energy were measured precisely with energy spectrometer consisted of magnet analyzer and tele-control detector and the practical electron energy was calculated under $5\%$ errors by maximum range of high energy electron beam in the water. 3. The correcting factors of perturbated dose distributions owing to radiation field, energy and material of the treatment cone were checked and described systematically and variation of dose distributions due to inhomogeneous tissues and sloping skin surfaces were completely compensated. 4. The electron beams, using the scatters; i.e., gold, tin, copper, lead, aluminium foils, were adequately diffused and minimizing the bremsstrahlung X-ray induced by the electron energy, irradiation field size and material of scatterers, respectively. 5. Inproving of the dose distribution from the methods of pendulum, slit, grid and focusing irradiations, the therapeutic capacity with limited electron energy could be extended.

[차량운동성능부문] Tractor-Semitrailer 차량의 제동특성 프로그램 개발

서명원(Myungwon Suh),박윤기(Yoonki Park),권성진(Seongjin Kwon),양승환(Seunghwan Yang),박병철(Byungchul Park) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-

Recently safety systems for the commercial vehicle have been rapidly developed. However, we still have many problems in the vehicle stability and the braking performance. Especially, a commercial vehicle may meet a dangerous braking condition when the vehicle is lightly loaded or empty and when the road is wet or slippery. Under these conditions, the truck can spin out or the tractor can jackknife or the trailer can swing out. To design the air brake system for the commercial vehicle, since the air brake system has many design variables, there must have been intensive researches on a method how to prevent dynamic instability and how to maximize the vehicle deceleration.<br/> In this study, mathematical models of the tractor-semitrailer and the air brake system including an ABS controller have been constructed for computer simulation. Also, simple examples are applied to show the usefulness of the program. Designers can use this simulation program for understanding the braking characteristics such as trajectory, braking distance, longitudinal deceleration, lateral deceleration, and yaw rate on various road conditions.

ABS를 위한 HIL시뮬레이터 개발

서명원(M. W. Suh),김석민(S. M. Kim),정재현(J. H. Chung),석창성(C. S. Seok),김영진(Y. J. Kim),이선일(S. I. Lee),이재천(J. C. Lee) 한국자동차공학회 1998 한국 자동차공학회논문집 Vol.6 No.2

The prevalence of microprocessor-based controllers in automotive systems has greatly increased the need for tools which can be used to validate and test control systems over their full range of operation. The objective of this paper is to develop a real time simulator of an anti-ck braking system and the methodology of using hardware-in-the-loop simulation based on a personal computer. By use of this simulator, the analyses of a commercial electronic control unit as well as the validation of the developed control logics for ABS were performed successfully. The simulator of this research can be applied to development of more advanced control system, such as traction control systems, vehicle dynamic control system and so forth.

지역특성에 따른 원도심 재생사업의 주민참여 방식에 대한 연구

서명원(Suh Myoung won),김성희(Kim Sung hee),한귀자(Han Gwi ja),서미진(Seo Mi jin) 한국조형디자인학회 2018 조형디자인연구 Vol.21 No.3

도시간의 불균형과 도시정책 패러다임의 전환에 따라 최근 도시재생사업이 활발하게 진행되고 있다. 인천시 도시재생사업은 2015년 이후 원도심 활성화를 위해 지자체별로 추진되고 있으며, 마을주민이 주체가 되어 문제점을 도출하고 해결과정으로 주민의 적극적인 참여를 중요시 하고 있다. 본 연구는 지역특성을 살린 주민참여방식을 통해 지역의 문제점과 현황을 파악하고, 지역에 적합한 차별화된 디자인 기본방향을 도출하기 위한 선행 연구이다. 본 연구의 목적은 인천시 원도심 활성화 사업을 위한 효율적인 주민참여 방식을 통해 디자인 방향을 제시하고, 향후 실시될 구체적인 디자인을 제언하는 데 있다. 본 연구는 인천시 원도심 디자인 활성화 5차 사업 중 연구대상지인 미추홀구 용일자유시장과 연수구 함박마을 2곳을 선정하였다. 주민참여 방식은 관련전문가와 지역주민이 초기단계에서부터 함께 참여하였으며, 총 다섯 단계로 나누어 실시되었다. 1차 단계는 주민참여 워크숍, 2차 단계에서는 원도심 재생사업에 대한 이해 및 주민역량강화 교육과정에서 문제점을 공유하고, 주민들의 요구파악을 위한 맵핑 및 인터뷰를 실시하였다. 3차~4차 계획에서는 아이디어 도출과 합의 과정을 거쳐, 마지막 5차 단계에서는 지역적 특성에 맞는 디자인 방향을 위한 도출 결과를 제시하였다. 본 연구결과, 용일자유시장은 청년작가활동중심의 문화형 재래시장 활성화 방안을 도출하였고, 연수구 함박마을은 다문화마을로서 문화소통 및 범죄예방과 유니버설을 기본 방향으로 한 디자인을 도출하였다. 본 연구는 지역 재생사업 및 주민참여를 토석으로 하는 지역 개발의 기본 방향에 부합되는 효율적인 워크숍 방안에 대한 정보를 공유함으로서 긍정적 문제해결의 기초자료로 활용되기를 기대한다. Urban regeneration has progressed actively in recent years due to an imbalance among cities and the transition of the urban policy paradigm. Urban regeneration projects to revitalize city centers have been promoted by local governments since 2015, and Residents identify and solve problems themselves, and the process of the active participation of the residents is emphasized. In this study, we selected two old urban areas as the fifth project for the design revitalization of the old city of Incheon . Residents, service design specialists and managers conducted a five-residency participation workshop. Throughout the first and second stages of understanding, the community engagement workshop was held with the understanding of regional problems and local residents during the initial urban regeneration project and the training process for enhancing residents capacity, and after coming up with ideas through the 3rd and 5th stages, we presented design direction according to regional characteristics through the process of consensus. A community council was formed to create a sustainable village(Local resident, Administrative agency) Finally, we have recognized the importance of active participation of local residents and the operation of the residents council through an advanced case study of urban regeneration projects. This research is a paper on efficient workshop methods that conform to the basic direction for revitalizing the design of the district by collecting opinions on regional problems and improvement directions through residents participation methods from the beginning.

인공신경망 기법과 유전자 기법을 혼합한 결함인식 연구

서명원(Myung Won Suh),심문보(Mun Bo Shim) Korean Society for Precision Engineering 1999 한국정밀공학회지 Vol.16 No.11

Tractor-Semitrailer 차량의 제동특성 프로그램 개발

서명원(Myungwon Suh),박윤기(Yoonki Park),권성진(Seongjin Kwon),양승환(Seunghwan Yang),박병철(Byungchul Park) 한국자동차공학회 2001 한국 자동차공학회논문집 Vol.9 No.2

Recently safety systems for the commercial vehicle have been rapidly developed. However, we still have many problems in the vehicle stability and the braking performance. Especially, a commercial vehicle may meet a dangerous braking condition when the vehicle is lightly loaded or empty and when the road is wet or slippery. Under these conditions, the truck can spin out or the tractor can jackknife or the trailer can swing out. To design the air brake system for the commercial vehicle, since the air brake system has many design variables, there must have been intensive researches on a method how to prevent dynamic instability and how to maximize the vehicle deceleration.<br/> In this study, mathematical models about the tractor-semitrailer and the air brake system including an ABS controller have been constructed for computer simulation. Also, simple examples are applied to show the usefulness of the program. Designers can use this simulation program for understanding the braking characteristics such as trajectory, braking distance, longitudinal deceleration, lateral deceleration, and yaw rate on various road conditions.

기상주행시험장(SVPG) 개발: 가상주행시험자의 시스템 구성 및 운영

서명원(Myungwon Suh),구태윤(Taeyun Koo),권성진(Seongjin Kwon),신영수(Youngsu Shin),조기용(Kiyong Cho),박대유(Daeyu Park) 한국자동차공학회 2002 한국 자동차공학회논문집 Vol.10 No.1

By using modeling and simulation. today's design engineers are simultaneously reducing time to market and decreasing the cost of development. while increasing the quality and reliability of their products. A driving simulator is the best example of this method and allows virtual designs of control systems. electronic systems, mechanical systems and hydraulic systems of a vehicle to be evaluated before costly prototyping. The objective of this paper is to develop the virtual proving ground using a driving simulator and to show its capabilities of an automotive system development tool. For this purpose, including a real-time vehicle dynamics analysis system, the PC-based driving simulator and the virtual proving ground are developed by using VR(Virtual Reality) techniques. Also ABS HIL(Hardware-In-the-Loop) simulation is performed successfully.

구동계를 고려한 엔진 마운트의 다분야 통합 최적설계

서명원(M. W. Suh),심문보(M. B. Shim),김문성(M. S. Kim),홍석길(K. S. Hong),이신복(S. B. Lee) 한국자동차공학회 2002 한국 자동차공학회논문집 Vol.10 No.3

This paper discusses a multidisciplinary design optimization of the engine mounting system to improve the ride quality of a vehicle and to remove the possibility of the resonance between the powertrain system and ve­hicle systems. The driveline model attempts to support engine mount development by providing sufficient detail for design modification assessment in a modeling environment. Design variables used in this study are the loca­tions, the angles and the stiffness of an engine mount system. The goal of the optimization is both deeoupling the roll mode of a powertrain and minimizing the vibration transmitted to the vehicle including the powertrain, simul­taneously. By applying forced vibration analysis for vehicle systems and mode decouple analysis for the engine mount system, it is shown that improved optimization result is obtained.

폴딩 도어 메커니즘 설계를 위한 기구학 및 동역학 해석 프로그램 개발

서명원(Myung-Won Suh),권성진(Seong-Jin Kwon),심문보(Mun-Bo Shim),조기용(Ki-Yong Cho),이은표(Eun-Pyo Lee),박승영(Seung-Young Park) 한국자동차공학회 2002 한국 자동차공학회논문집 Vol.10 No.6

Since the bus is regarded as the one of the most public transportation systems, research on the safety and facilities of the bus has been increased actively in recent years. In this paper, we concern the design of the bus door mechanism that is composed of many linkages and actuators(or motors). In particular, the folding door mechanism is representative system installed in most of urban buses.<br/> To design the folding door mechanism, we construct the kinematic and dynamic analysis model for computer simulation. Also, the dynamic analysis is accomplished by both direct dynamics and inverse dynamics. Since the folding door mechanism has many design variables, the analysis program is developed to perceive kinematic and dynamic characteristics according to the design variables and simulation conditions.<br/>

가상주행시험장(SVPG) 개발: Ⅰ. 가상주행시험장의 시스템 구성 및 운영

서명원(Myungwon Suh),구태윤(Taeyun Koo),권성진(Seongiin Kwon),신영수(Youngsu Shin),조기용(Kiyong Cho),박대유(Daeyu Park) 한국자동차공학회 2001 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2001 No.5_2

By using modeling and simulation, today's design engineers are simultaneously reducing time to market and decreasing the cost of development, while increasing the quality and reliability of their products. A driving simulator is the best example of this method and allows virtual designs of control systems, electronic systems, mechanical systems and hydraulic systems of a vehicle to be evaluated before costly prototyping.<br/> The objective of this paper is to develop the virtual proving ground using a driving simulator and to show its capabilities of an automotive system development tool. For this purpose, including a real-time vehicle dynamics analysis system, the PC-based driving simulator and the virtual proving ground are developed by using VR(Virtual Reality) techniques. Also ABS HIL(Hardware-In-the-Loop) simulation is performed successfully.<br/>