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1996년도 제35차 대한소화기학회 추계학술대회 / 일반연제 : 간 ; HBeAg 양성인 만성 B 형 간질환에서 HBV Core Promoter 돌연변이의 임상적 의의
김연수,김성일,조영덕,이영홍,김진오,봉형근,조주영,이준성,이문성,황성규,황승덕,심찬섭,이희발 ( Y . S . Kim,S . I . Kim,Y . D . Cho,Y . H . Lee,J . O . Kim,H . K . Bong,J . Y . Cho,J . S . Lee,M . S . Lee,S . G . Hwang,S . D . Hwang,C . S . S 대한소화기학회 1996 대한소화기학회지 Vol.28 No.1
김연수(Y. S. Kim),이대현(D. H. Lee),김용주(Y. J. Kim),정선옥(S. O. Chung),김태형(T. H. Kim),최창현(C. H. Choi) 유공압건설기계학회 2015 유공압건설기계학회 학술대회논문집 Vol.2015 No.10
This research is conducted to develop automatic steering system for unmanned agricultural machine developing, and performance of the system was evaluated by parallel parking of conventional vehicle. The automatic steering system consist MDPS (motor drivven power steering) to control steering, ESC (electronic stability control) to acquire wheel speed, ultrasonic sensor to recognize parking space, and controller to communicate and handle data. Parallel parking process using automatic steering control consist parking space recognition, backward path generation, and steering control for path tracking. To recognize parking space length and width of parking space were measured using ultrasonic sensor and calculated traveling distance. The path for parallel parking was generated based on kinematic model of conventional vehicle, and PI controller was used to control steering angle for path tracking. Parallel parking simulation was conducted to determine minimum speed of steering angle control, because too low speed of steering angle control increase error of vehicle position and too high speed of steering angle control has cause MDPS slip. The result of the simulation was that 500 °/s of control speed was selected as minimum speed of steering angle. In order to evaluate performance of the automatic steering system tests for performance evaluation of parking space recognition, position control of steering angle, parallel parking were conducted. The results of performance evaluation test were that measured area of parking space using ultrasonic sensor was smaller than the actual are in every case and standard error became larger when the speed of the car was faster. The performance of the position control of steering angle was that maximum overshoot increased if the speed and steering angle increased when checking at angles of 60, 120 and 180. Delay time was 0.3 seconds with fix time of 2 seconds was measure and the rate of error was mostly below 1% which showed outstanding performance. However, when measuring at 240 degree, the slip of MDPS occurred which caused no result to show. Parallel parking using automatic steering control was conducted by vehicle speed condition, the results show that the errors on x-axis and y-axis were below 0.54 m and 0.14 m, respectively, and error on steering angle was less than 1°; therefore it is possible that parallel parking using automatic steering control system for conventional vehicle.
라미부딘 내성 바이러스에서 나타나는 HBV core 유전자의 변이 양상
김연수 ( Y. S. Kim ),김영석 ( Y. S. Kim ),장재영 ( J. Y. Jang ),천갑진 ( G. B. Cheon ),천영국 ( Y. K. Cheon ),문종호 ( J. H. Moon ),조영덕 ( Y. D. Cho ),이문성 ( M. S. Lee ),심찬섭 ( C. S. Shim ),김부성 ( B. S. Kim ) 대한소화기학회 2002 대한소화기학회 춘계학술대회 Vol.2002 No.-
<목적> B 형 간염바이러스(HBV)의 core 항원은 면역세포의 주된 목표물이 되는 항원이며 이 영역의 변이는 간내 염증반응이 활발한 면역제거기에 흔히 나타난다. Core 변이의 특징은 변이가 집중적으로 나타나는 부위(mutation clustering region)가 존재한다는 점인데 이들 부위는 면역세포나 항체에 인식되는 항원 결정기이리라 추측된다. 연자들의 보고(대한소화기학회지 1999;33:67)에 의하면 core codon 80-100과 13
1996년도 제35차 대한소화기학회 추계학술대회 / 췌장 가성남종의 내시경적 One-step 내배액술의 임상적 유용성
조영덕(Y . D . Cho),이영홍(Y . H . Lee),봉형근(H . K . Bong),김진오(J . O . Kim),조주영(J . Y . Cho),김연수(Y . S . Kim),이준성(J . S . Lee),이문성(M . S . Lee),심찬섭(C . S . Shim),황성규(S . G . Hwang),전기원(K.W. Jeon),변재호(J.H. By 대한소화기학회 1996 대한소화기학회지 Vol.28 No.1