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김홍건(H. G. Kim),고범용(B. Y. Go),강영우(Y. W. Kang),박명모(M. M. Park) 한국생산제조학회 2005 한국공작기계학회 추계학술대회논문집 Vol.2005 No.-
This study did the grinding processing of a carbon-ceramic disc and found out the processing characteristic. The grinding processing used the diamond resin wheel and processed. A wear of the diamond wheel and Load are big but are the stability relatively. The width of the change of a surface roughness is small. Therefore Grinding characteristics got good result.
고혈압성 뇌실질내 출혈의 CT 소견과 치료 결과의 분석 고찰
강영우,김태영,이봉암,임언 대한신경외과학회 1981 Journal of Korean neurosurgical society Vol.10 No.1
The result of the treatment of hypertensive intracerebral hemorrhage in 40 cases, who admitted to the Kyung Hee Medical Center from October 1977 to February 1981, are analyzed with the correlation to the CT findings. The following results were obtained. 1) In the age distribution, the 6th decade was most frequently involved. 12 among 40 patients (30%). 25 cases were male and I5 cases were female. 2) The most frequent site of hypertensive intracebral hemorrhage was putamen in 40% ; followed by subcortical 30%, thalamic 1576, cerebellar 7.5%. and pontine 7.5%. Intraventricular hemorrhage occured in 27.5%. In morphological classification of the hematoma on CT scans, the most frequent type of putaminal hemorrhage was type 3, in 56%, and the most frequent type of thalamic hemorrhage was type 2A and type 3, respectively in 33%. 3) Calculated amounts of the hematomas based on CT scans ranged from 3 to 311 cc. The averages were 119cc in the putaminal hemorrhage, 79cc in the thalamic hemorrhage, 102cc in the subcortical hemorrhage, 51cc in the cerebellar hemorrhage and 13cc in the pontine hemorrhage. 4) On the basis of the morphological classification, the fact, that the operation was done or not, had not influenced on the outcome, but the type had relatively constant relationship with the outcome. 5) When the hematoma was less than 100cc, the result was favorable in the cases of the stage of O or I at the operated and the non-operated, but in the cases of stage of III, the operated cases showed the better outcome than the non-operated cases. When the amount of the hematoma of the hemorrhage was over 100cc. the result was favorable after the operation in the cases of the stages O or I, but in the cases of the stage III, all patients died after the operation. 6) It may be preferable to decide the time of the operation according to the progressive changes in the conscious level and neurological findings.
소형연료전지 자동차의 부하특성에 따른 시스템 설계에 관한 기초연구
김홍건,강영우,김유신 한국공작기계학회 2004 한국생산제조학회지 Vol.13 No.5
Feasibility of the small capacity fuel cell powered vehicle is carried out for system design with loading characteristics. The major design concepts which include battery, driving motor, and fuel cell module are analyzed and discussed for the future development. A load characteristics program is developed in order to calculate the traction power of fuel cell vehicle according to the driving courses specified. Further, the small capacity fuel cell vehicle is analyzed to determine the capacity of stack as a function of the velocity for an appropriate power required.
김홍건,강영우,김유신 한국공작기계학회 2004 한국공작기계학회 춘계학술대회논문집 Vol.2004 No.-
The main objective of the present study is to analyze the feasibility of fuel cell powered vehicle, which leads to carry out system design and performance analysis. The major design concepts which include battery, driving motor, and fuel cell module are analyzed and discussed for the future development. The traction power of fuel cell vehicle is calculated according to the driving courses specified. Further, the fuel cell stack is analyzed to determine the capacity of stack as a function of velocity for the appropriate power required.
김홍건,강영우,유기현 전주대학교 공학기술종합연구소 2003 전주대학교 공학기술종합연구소 학술논문집 Vol.9 No.1
An electric vehicle uses battery to a power source whether it limps a high efficiency, without environmental pollution. It coincides the best at the 21 the century environmental regulation and energy frugality. The motor control system using DC-DC converter is carried out in this study. The present control system is structured the better condition than that of the AC-DC converter with DC-AC inverter. Further, a vehicle dynamics analysis is performed for the case of Mini-Baja It is found that the analysis dynamic system for the Mini-Baja gives a good design parameters.
김홍건,양성모,노홍길,나석찬,강영우 한국공작기계학회 2003 한국공작기계학회 춘계학술대회논문집 Vol.2003 No.-
An analysis of the turbe-blower shaft attached to fuel cell using 3-D FEA (Finite Element Analysis) is proposed by Lanczos algorithm. The modal analysis was performed in order to investigate natural frequencies for 10 times. It is found that the first mode of natural frequency is 111.243 and the maximum displacement is 0.16mm. Consequently, It is found that the dynamic design of turbo-blower shows a good responses transiently.
김홍건,강영우,유기현 한국공작기계학회 2003 한국공작기계학회 추계학술대회논문집 Vol.2003 No.-
An electric vehicle uses the system to a power source whether it limps a high efficiency, without environmental pollution. It coincides the best at the 21th century environmental regulation and energy frugality. The motor control system using DC-DC converter is carried out in this study. The present control system is structured the better condition than that of the AC-DC converter with DC-AC inverter. Further, a vehicle dynamics analysis is performed for the case of Mini-Baja. It is found that the analysis dynamic system for the Mini-Baja gives a good design parameters.