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김기승(Kim Gi-Seung),김치조(Kim Chi-Jo),임관수(Lim Kwan-Soo),조용기(Cho Yong-Gee) 한국철도학회 1998 한국철도학회 학술발표대회논문집 Vol.- No.-
It is extremely necessary to use such a secure way to transmit information to a train, which is needed for operating a train. In our system, The information including the allowable velocity of the train, train existence in current area, and other data necessary for operating train, is transmitted in the form of FM signal. Received by the receiver located on train, the signal is filtered, demodulated and analyzed to extract the original information. The analysis of the demodulated signal is done through FFT algorithm using sliding slot. These all are processed digitally by hardware which is implemented by 32bit DSP. The experiments show the validity of the algorithm we presented.
엄정규(Um Jung Kyou),조용기(Cho Yong Gi),김치조(Kim Chi Jo),한재문(Han Jae Moon) 한국철도학회 2006 한국철도학회 학술발표대회논문집 Vol.- No.-
In this paper, an AF track circuit receiver which is using DSP technique is designed and tested in the Lab. and field. The receiver detects of a train and operates the track relay to inform this occupation to ground equipments. Basic algorithms, digital filters, FM demodulation and DFT are simulated by computer and applied to the receiver. The test of receiver is processed under the LAB condition and the field. Results of the test shows that the response time is less than 500ms. This paper presents that the receiver has good maintenance and less variation of device characteristics and is applicable to the Korea High Speed Line.
고속선 연속정보 메시지 및 레벨 측정을 위한 차상신호 검측장치 설계
엄정규(Jung-Kyou Um),임재식(Jae-Sick Lim),김치조(Chi-Jo Kim),조용기(Yong-Gee Cho),유광균(Kwang-Kyun Yoo) 한국철도학회 2005 한국철도학회 학술발표대회논문집 Vol.- No.-
A speed of a train is controlled by Automatic Train Control system and the continuous transmission system provide the speed related information in the Korean High Speed Line. The primary objective of this paper is to measure the level of continuous signal and to calculate the message of that signal. A measuring equipment is introduced and the equipment provide the base line of the level of current and the correction information of the message.
CASE 도구를 이용한 ATC 차상 소프트웨어의 UML 모델링
양찬석(Yang Chan Seok),임재식(Lim Jae Shik),한재문(Han Jae Moon),김치조(Kim Chi Jo),조용기(Cho Yong Gi) 한국철도학회 2006 한국철도학회 학술발표대회논문집 Vol.- No.-
ATC on-board equipment require realtime embedded software with high level of safety and reliability. To satisfy these requirements, many techniques are applied to the development of software during the lifecycle. In case of software modeling, object-oriented methodology is widening its niche replacing traditional structured methodology and modeling in UML using a CASE tool is a growing trend. In this paper, we modeled ATC on-board software in UML using Rhapsody, which is a modeling tool for realtime embedded software. We modeled the behavior of ATC on-board equipment based on state machine diagram and validated the model using the animation feature provided in the tool. According to our study, the CASE tool based on UML showed high level of applicability in modeling and verifying the software with complex behavioral characteristics.
HARMONY 프로세스를 이용한 ERTMS/ETCS 지상 시스템의 요구 및 기능 분석
엄정규(Um Jung-Kyou),양찬석(Yang Chan-Seok),김형훈(Kim Hyoung-Hoon),조용기(Cho Yong-Gi),김치조(Kim Chi-Jo) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-
ERTMS/ETCS is a signalling and control system designed for interoperability between railway networks. In this paper, SysML was used for modeling of the ERTMS/ETCS trackside system. We used use case diagrams and sequence diagrams for requirements analysis and functional analysis. By doing this, we could show that main functions of the ERTMS/ETCS trackside can be described and verified based on scenarios.
FPGA를 이용한 한국형 고속전철 불연속 정보 수신보드 개발에 관한 연구
한재문(Han Jae-Mun),엄정규(Um Jung-Kyu),김치조(Kim Chi-Cho),조용기(Cho Yong-Gee) 한국철도학회 2004 한국철도학회 학술발표대회논문집 Vol.- No.-
There are two types of controller between railway and train. those are the Continuous Message Controller and the Intermittent Message Controller using for KHSR. The conventional Intermittent Message Controller board used a variable resister for setting the phase, but the variable resister affected some environmental facts, such as temperature, humidity, and vibration, etc. This study suggests how to solve the environmental problem described above. Using FPGA is quite profitable. It"s easy to use and maintain, flexible with the New algorithm to fix up the problem.
A 형 혈우병환자에서 방광과 누공을 형성한 혈우병성 위종양 1 예
하철봉,김정완,김치호,송근암,조군제,한상영,나하연,임홍섭,박희옥,이병구 대한내과학회 1988 대한내과학회지 Vol.35 No.4
A hemophilic pseudotumor is a rare complication of hemophilia, defined as a progressive cystic swelling involving muscle, produced by recurrent hemorrhage and accompanied by roentgenographic evidence of bone involvement. Its treatment is very difficult because of the danger of sepsis and continued hemorrhage and necrosis. The best treatment is the prevention of hemorrhage in emophiliacs. Recently, we experienced a hemophilic pseudatumor in a hemophilia A patient with formed a fistula with the urinary bladder, This 36 year old man, diagnosed as a hemophilia at age 3 years, presented with abdominal distension, abdominal pain and hematuria. The abdominal CT scan and cystogram showed a huge right lower abdominal mass which had eroded the right iliac bone and formed a fistula with the bladder. After subs-titutional therapy, the patient improved and was discharged.