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김남해(N.H Kim),백병산(B.S Baek),전용주(Y.J Jeon),김지홍(J.H Kim),이병송(B.S Lee),김종우(J.W Kim) 한국철도학회 2002 한국철도학회 학술발표대회논문집 Vol.- No.-
This paper presents general concept of DC switch gear(DCSWGR). Normally, DCSWGR consist of Digital protection unit(DPU), High Speed Circuit Breaker(HSCB), Disconnect Switch(DS), Programmable Logic Control(PLC), Auxiliary Relays and etc. Most of the components has its special characteristics and their interface between each others are various and complex. In this paper every constituent general design are preceded and interface between each component are examined. And also DCSWGR operation logic with logical diagram including interlock signal are introduced.
간접 분사식 디젤 기관에서 메탄올/경유 Dual 연료에 의한 성능 및 배출물 특성에 관한 연구
김종우(J.W. Kim),배상수(S.S. Pae),이상준(S.J. Lee),김유광(Y.K. Kim) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.6_2
This paper presents the characteristics of the performance and the emissions of indirect diesel engine by using the dual fuel, which is composed of the methanol and the diesel. To do this, fumigation and mixing injection method were applied respectively, and compared with each other. In additions, the intake air temperature were varied from the ambient temperature to 50 "C in order to investigate the effects of the higher latent heat of methanol. In fumigation, the<br/> air assisted injection assembly are used to accelerate the atomization of methanol. As a results, the load are the main factor to limit the mixing ratio, so fumigation is better than the mixing injection, because of controlling the mixing ration in proportional to the load.<br/>
김종우(J. W. Kim),김현규(H. k. kim),박호준(H. J. Park),전충환(C. H. Joen),장영준(Y. J. Chang) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.11_2
To diagnosis the complexible diesel fuel combustion processes and spray characteristics, many simplified injection systems are developed and used. Especially it is very popular that the solenoid servo valve use to control the fuel providing from injection pump to injector, but this system cause some problems, one of them is that makes a unsteady motion of needle when operating time is not enough. In this study, to clarify the effect of this unsteady motion of needle was measured by the injection rate and spray characteristics with using needle lift sensor.<br/>
사상관련전위 P300 요소를 이용한 알츠하이머형 치매의 탐지와 분석
박은혜 ( E. H. Park ),이영혁 ( Y. H. Lee ),임재환 ( J. W. Im ),김종우 ( J. W. Kim ),황의완 ( W. W. H ),김현택 ( H. T. Kim ) 한국감성과학회 2002 추계학술대회 Vol.2002 No.-
This study is to develop the Alzheimers disease (AD) detection and analysis system using event-related potential (ERP) of AD patients. We recorded ERP in an auditory oddball paradigm in mild AD (n=25), severe AD (n=12), age-matched normal aged controls (n=17), and young controls (n=7). The amplitude and latency of target P300 components were compared among 4 groups. The relationship between P300 measures and neuro psychological test (K-DRS) scores were evaluated by correlations. The latency of P300 was prolonged in AD and the effects were correlated with the severity of dementia. The P300 amplitude was not affected significantly in AD. Theres no difference between normal aged group and young group. These results suggest that the P300 component is specifically affected by Alzheimer type dementia.
위장관 ( 胃腸管 ) : 소아장중첩증의 치료에 영향을 주는 요인 분석
김종우(J . W . Kim),황의호(E . H . Hwang),최승훈(S . H . Choi),이철(C . Lee),김규언(K . U . Kim),이승규(S . K . Lee),오기근(K . K . Oh),손영모(Y . M . Son) 대한소화기학회 1990 대한소화기학회지 Vol.22 No.3
N/A We report the retrospective analysis of 111 patients with intussusception who were admitted to the Department of Surgery and Department of Pediatrics of Yongdong Severance Hospital from March 1,1988 to August 31,1989. SPSS-PC with IBM-AT personal computer was used for the analysis of the data. Following results were obtained. 1) 79 patients were successfully treated with Barium reduction and patients underwent sugical management. The success rate of Barium reduction was 71.2%. 2) Male to female ratio was 1.8:l. Occurrence of the age under 12 months was 69.6% for surgically treated group and 78.1%. for medically treated group. 3) Mean hospital stay of surgically treated group was 7.5 days and that of medically treated group was 3.9 days. (p=0.012) 4) Duratian of symptom was 38.6 hours for surgically treated group and 25.4 hours for medically treated group.