http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
현진해(J H Hyun),황일순(I S Whang),박민희(M H Park),전훈재(H J Chon),이상우(S W Lee),유호상(H S Ryu) 대한소화기학회 1987 대한소화기학회지 Vol.19 No.1
N/A From January 1980 to January 1987, a clinical study of 192 cases with colorectal cancer was made in Korea University Haehwa Hospital. The following results were obtained; 1) The peak age incidence was in sixth decade with 68 (35.4%) patients. 2) The male to female ratio was 1.13:l. 3) The location of tumor was in the rectum (36.1%), sigmoid colon (23.7%), ascending colon, descending colon and transverse colon in that order of frequency. 4) Bowel habit changes were the most common complaints. Abdominal pain and bloody stool were next common in rectosigmoid colon cancer cases. 5) Stool occult blood was positive in 63% of the cases. 6) Titer of carcinoembryonic antigen was over 10 ng/ml in 52.6% of the cases. 7) On gross pathologic finding, the exophytic type was the most common and according to Dukes classification, the stage C, was the most common regardless of tumor location.
현옥배,김혜림,임성우,심정욱,박권배,오일성,Hyun, O.B.,Kim, H.R.,Yim, Y.S.,Sim, J.,Park, K.B.,Oh, I.S. 한국초전도학회 2008 Progress in superconductivity Vol.10 No.1
We present domestic efforts for superconducting fault current limiter (SFCL) application in the Korea Electric Power Corporation (KEPCO) grid and pending points at issue. KEPCO's decision to upgrade the 154 kV/22.9 kV main transformer from 60 MVA to 100 MVA cast a problem of high fault current in the 22.9 kV distribution lines. The grid planners supported adopting an SFCL to control the fault current. This environment friendly to SFCL application must be highly dependent upon the successful development of SFCL having specifications that domestic utility required. The required conditions are (1) small size of not greater than twice of 22.9 kV gas insulated switch-gear (GIS), (2) sustainability of current limitation without the line breaking by circuit breakers (CB) for maximum 1.5 seconds. Also, optionally, recommended is (3) the reclosing capability. Conventional resistive SFCLs do not meet (1) $\sim$ (3) all together. A hybrid SFCL is an excellent solution to meet the conditions. The hybrid SFCL consists of HTS SFCL components for fault detection and line commutation, a fast switch (FS) to break the primary path, and a limiter. This characteristic structure not only enables excellent current limiting performances and the reclosing capability, but also allows drastic reduction of HTS volume and small size of the cryostat, resulting in economic feasibility and compactness of the equipment. External current limiter also enables long term limitation since it is far less sensitive to heat generation than HTS. Semi-active operation is another advantage of the hybrid structure. We will discuss more pending points at issues such as maintenance-free long term operation, small size to accommodate the in-house substation, passive and active control, back-up plans, diagnosis, and so on.
권영진(Y. J. Kwon),송완석(W. S. Song),현무용(M. Y. Hyun),장성일(S. I. Jang),최정환(J. H. Choi),정일환(I. H. Jeong) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
본 논문에서는 GIS 감시 진단을 위한 IEC61850 기반의 센서용 네트워크 구성에 대한 기초 연구 결과를 기술 하였다. IEC61850 프로세스 버스에 대한 영향을 최소화하기 위하여 센서 데이터 전송을 위한 전용 네트워크를 제안하였다. 또한, 제안된 센서용 네트워크의 성능을 검증하기 위하여 IEC61850 기반의 센서 데이터 계측 유닛을 구현하였으며 전기연구원 주관의 공인인증 시험을 통해 이들의 성능을 검증하였다.
Resistance Development in Au/YBCO Thin Film Meander Lines under High-Power Fault Conditions
김혜림,심정욱,최인지,임성우,현옥배,Kim, H.R.,Sim, J.,Choi, I.J.,Yim, S.W.,Hyun, O.B. The Korean Superconductivity Society 2006 Progress in superconductivity Vol.8 No.1
We investigated resistance development in $Au/YBa_2Cu_3O_7(YBCO)$ thin film meander lines during high-power faults. The meander lines were fabricated by patterning 300 nm thick YBCO films coated with 200 nm thick gold layers into meander lines. A gold film grown on the back side of the substrate was also patterned into a meander line. The front meander line was connected to a high-power fault-test circuit and the back line to a DC power supply. Resistance of both lines was measured during the fault. They were immersed in liquid nitrogen during the experiment. Behavior of the resistance development prior to quench completion could be understood better by comparing resistance of the front meander lines with that of the back. Quench completion point could be determined clearly. Resistance and temperature at the quench completion point were not affected by applied field strength. The experimental results were analyzed quantitatively with the concept of heat transfer within the meander lines/substrate and to the surrounding liquid nitrogen. In analysis, the fault period was divided into three regions: flux-flow region, region prior to quench completion, and region after quench completion. Resistance was calculated for each region, reflecting the observation for quench completion. The calculated resistance in three regions was joined seamlessly and agreed well with data.