Shell Eco-marathon을 위한 차량 경량화 연구

조병관(Byung-kwan Cho),전성민(Seong-min Jeon),이대권(Dae-kwon Lee),이선호(Sun-ho Lee) 한국자동차공학회 2016 한국자동차공학회 지부 학술대회 논문집 Vol.2016 No.5

초임계 유체 크로마토그래피(SFC) 방법에 의한 Paclitaxel 및 그 유도체의 분리 정제

조병관(Byung-Kwan Cho),변상요(Sang Yo Byun) 한국생물공학회 1999 KSBB Journal Vol.14 No.1

횡단성 척수염이 첫증상으로 발현된 전신성 홍반성 루푸스

조병관 ( Byung Kwan Cho ),송정수 ( Jeong Soo Song ),배성권 ( Sung Kwon Bae ),윤승재 ( Seung Jae Yoon ),박원 ( Won Park ) 대한류마티스학회 2000 대한류마티스학회지 Vol.7 No.3

This is a case report of systemic lupus erythematosus presented as a transverse myelitis. Central nervous system involvement in systemic lupus erythematosus is a relatively common complication. But the transverse myelitis as a central nervous system involvement in systemic lupus erythematosus is rare and the transverse myelitis as the first manifestation of systemic lupus erythematosus has not been reported in Korea. Thus we report a case of the transverse myelitis as a first manifestation of systemic lupus erythematosus with the literature review.

Shell Eco-Marathon 차량을 위한 엔진 시스템 개선

조병관(Byung-kwan Cho),전성민(Seong-min Jeon),이종헌(Jonghun Lee),김종현(Jonghyeon Kim),윤종민(Jongmin Yun) 한국자동차공학회 2017 한국자동차공학회 지부 학술대회 논문집 Vol.2017 No.6

This paper is representing the way to enhance fuel consumption efficiency of Shell Eco-marathon Asia 2017 vehicle, focus on theoretical calculation of fuel consumption and analysis of fluid-dynamics. New vehicle is designed for Shell Eco-Marathon(SEM) Asia 2017 and is modified from SEM Asia 2014 participated vehicle. Modification had achieved by expecting fuel consumption rate with considering fuel wall film effect, using flow analysis to optimize the intake and exhaust manifold. Finally, The car achieved 167.5 km/L and has improved 17.4% of fuel efficiency when being compared to previous model. Although record has been improved.

[기술논문] Shell Eco-marathon을 위한 자작 자동차 경량화 연구

조병관(Byung-kwan Cho),전성민(Seong-min Jeon),이대권(Dae-kwon Lee),이선호(Sun-ho Lee) 한국자동차공학회 2016 한국 자동차공학회논문집 Vol.24 No.5

This paper sought to find a way to improve the fuel consumption rate of a vehicle for the Shell Eco-marathon Asia 2014, with a special focus on the correlation between vehicle dynamics, aerodynamics and chassis weight reduction. In ‘KUTY-Eco 1’ designed for SEM Asia 2014, a chassis made with an aluminum alloy tube, semi-monocoque structure and a pivot steering system were adopted to reduce weight and to secure better performance. The goals were achieved using computer-aided engineering(CAE) and parameter study. Finally, ‘KUTY-Eco 1’ was created, the lightest car in the competition‘s prototype petrol(gasoline) type category. ‘KUTY-Eco 1’ secured the official record of 142.7 km/liter during the competition.

산학 연계 교육 : 공공부문 기술교원의 직업능력 개발을 위한 필요요소 도출에 관한 연구

조병관 ( Byung Kwan Cho ),류길하 ( Gil Ha Ryu ) 한국실천공학교육학회 2010 실천공학교육논문지 Vol.2 No.2

본 연구의 목적은 공공부문 기술교원들의 능력향상을 위한 체계적인 연구를 수행하여 변화하는 교육환경 및 패러다임의 변화에 따른 교육시장의 변화에 능동적으로 대처하고 현장감 있고 내실 있는 기술교육을 실시할 수 있도록 기술교원의 능력향상을 위한 프로그램 개발의 기초를 마련하는데 있다. 특히 기술교육 분야에 종사하는 교원은 빠르게 발전하는 산업현장의 신기술에 대하여 동향을 잘 파악하고 있어야 할 뿐 아니라 새로운 기술과 지식을 습득할 수 있는 능력 또한 겸비하여야 한다. 본 연구에서는 기술교원의 능력에 대한 사전조사를 실시하여 타당성을 검토하고 현재의 능력개발 과정을 파악하며 조사 결과를 바탕으로 각 분야별로 능력향상을 위하여 필요한 요소를 도출하여 이에 부합하는 교육과정을 운영하는데 기초 자료로 사용하고자 한다. The objective of this study is to perform the systematic research and to develop programs for improving the teaching abilities of vocational teachers, so that they can cope with the variant educational condition in accordance with the change of paradigm. Especially vocational teachers who engage in technical education can acquire new knowledge and techniques as well as grasp the trend of the new technologies required in industrial fields. In this study preliminary research for the capabilities of vocational teachers was held and the feasibility was investigated. Upon these investigations the essential elements for the improvement of vocational teachers` capabilities were derived. These will be used as preliminary data for operating curricula.

공공부문 기술교원의 능력향상에 관한 연구

조병관 ( Byung Kwan Cho ),류길하 ( Gil Ha Ryu ) 한국실천공학교육학회 2011 실천공학교육논문지 Vol.3 No.1

본 연구에서는 기술교원의 능력에 대한 사전조사 결과를 바탕으로 기술교원의 능력향상을 위한 요소들과 내용들을 개발하며 이에 부합하는 교육과정을 운영함으로써 기술교원들로 하여금 자기계발에 충실하고 나아가 기술교육 현장에 적용함으로써 보다 효율적이고 창의적인 기술교육을 할 수 있는 기회를 가질 수 있도록 한다. 기술교원의 능력향상을 위한 교육내용과 효과적인 교육과정 개발은 급변하는 기술사회에 창의력과 적응력을 갖춘 기술교원을 양성할 뿐만 아니라 궁극적으로 공공분야 기술교육의 질을 향상시키고 나아가 국가 경쟁력 확보의 기초가된다. 본 연구의 목적은 공공부문 기술교원의 능력향상을 위한 기초 연구에 주안점을 두고 있다. 본 연구의 결과는 공공부분 기술교원의 능력향상뿐만 아니라 일반 기술 인력의 능력향상을 위한 프로그램의 개발 및 운영의 기초 자료로 활용할 수 있으며 이를 바탕으로 향후 지속적인 연구개발 및 개선을 통하여 보다 효과적인 능력향상 프로그램으로 발전시켜 나갈 수 있다. In this study the elements and the contents for improvement of the ability of vocational training teachers are developed to improve themselves and to teach creatively and effectively in vocational and technical training areas. Teaching contents and curricula for improvement of the ability of vocational training teachers will not only bring up creative technical teachers in rapidly changed teaching environment but also increase national competitiveness by raising the quality of the teachers. The results of this study can be used for the development and the operation of a program not only for vocational teachers but also for general technicians. on the basis of this study programs for the improvement of abilities can be improved later on through continuous study and development.

CRISPR/Cas System for Dermatological Research

조병관 ( Byung-kwan Cho ) 한국피부장벽학회 2018 한국피부장벽학회지 Vol.20 No.2

The type II CRISPR (clustered regularly interspaced short palindromic repeats)/Cas9 (CRISPR-associated protein 9) system has been increasingly utilized to edit and manipulate the genomes of a wide range of organisms. In this system, a single protein (Cas9) forms a ribonucleoprotein complex with a short CRISPR RNA (crRNA) and a trans-acting crRNA (tracrRNA), which shows crRNA-directed DNA recognition and site-specific cleavage of target DNA. In addition to the sequence complementarity conferred by the crRNA, the short PAM sequence 5´-NGG-3´ plays a critical role in determining specificity of CRISPR system. Further, the development of a chimeric single-guide RNA (sgRNA) has simplified this system and provided efficient DNA targeting. As suggested by naturally occurring and engineered DNA-binding proteins such as transcription factors, zinc fingers, or transcription activation-like effector (TALE) proteins, the RNA-guided endonuclease Cas9 was engineered to generate a catalytically inactive form, dCas9, by introducing two mutations in the nuclease domains (D10A and H840A). Unlike the fixed sequence specificity of other DNA-binding proteins, dCas9 is thereby able to recognize target genomic loci, directed by a sgRNA, without DNA cleavage activity. This unique DNA targeting activity of dCas9 offers a molecular scaffold for various applications including targeted transcriptional and epigenetic regulation in cells. Furthermore, dCas9 and its variants have been used for genome-scale studies, with large-scale sgRNA library pools. This application is aimed at understanding gene functions responsible for diverse phenotypes of prokaryotic and eukaryotic cells, as illustrated using transcriptional interference (CRISPRi) and activation (CRISPRa) systems. This system has recently been widely repurposed for many biological applications such as the functional analysis of individual essential genes involved in cellular phenotypic changes and the rapid assessment of target genes during drug development.

기호 운동방정식 생성과 병렬형 로봇 모델링

송성재,조병관,이장무,Song, Sung-Jae,Cho, Byung-Kwan,Lee, Jang-Moo 대한기계학회 1996 大韓機械學會論文集A Vol.20 No.1

A computer program for automatic deriving the symbolic equations of motion for robots using the programming language MATHEMATICA has been developed. The program, developed based on the Lagrange formalism, is applicable to the closed chain robots as well as the open chain robots. The closed chains are virtually cut open, and the kinematics and dynamics of the virtual open chain robot are analyzed. The constraints are applied to the virtually cut joints. As a result, the spatial closed chain robot can be considered as a tree structured open chain robot with kinematic constraints. The topology of tree structured open chain robot is described by a FATHER array. The FATHER array of a link indicates the link that is connected in the direction of base link. The constraints are represented by Lagrange multipliers. The parallel robot, DELTA, having three-dimensional closed chains is modeled and simulated to illustrate the approach.

구조해석을 이용한 제연용 축류팬 설계에 관한 연구

국정근(Jeong-Keun Kook),조병관(Byung-Kwan Cho) 한국산학기술학회 2023 한국산학기술학회논문지 Vol.24 No.3

산업이 발전함에 따라 지하 공간을 활용하는 시설물이 급증하고 지하 공간에 대한 환기방식이 점차 환기유로를 직접 활용하는 방식으로 변경됨에 따라 화재가 발생하는 극한의 상황에서 제연 및 배기는 매우 중요하다. 현재는 환기팬을 벨트 구동식으로 적용하기에는 고온에 매우 취약하다는 단점이 있다. 본 연구에서는 벽부형으로 제작하는 제연용 축류팬의 날개의 익형 설계와 허브의 설계를 3차원 모델링 프로그램을 통해 설계하고, CAE 프로그램인 Ansys Workbench를 활용하여 운전조건에 대한 정적구조해석과 고온 신뢰성 검토를 위한 열응력해석으로 통해 제연용 축류팬의 구조안전성을 검증하여 설계하였다. 설계된 제연용 축류팬의 고온 신뢰성 시험을 공인인증기관에서 실시하여 구조안전성을 확보하였다. As industry develops, the number of facilities utilizing underground spaces is increasing, and the ventilation method for underground spaces is gradually changing to a method that directly utilizes ventilation channels. Currently, there is a disadvantage in that the ventilation fan is very vulnerable to high temperatures to be applied as a belt drive type. In this study, an airfoil design for the blades and hub of a wall-mounted axial flow fan for smoke control were designed through a 3D modeling program. A static structural analysis and high-temperature reliability review were conducted using the CAE program Ansys Workbench. Through thermal stress analysis, the structural safety of the fan was designed and verified. The high-temperature reliability test of the fan was conducted by an authorized certification institution to secure structural safety.