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수상함 전투체계 육상시험체계용 개체생성기 구현에 적합한 병렬처리기법에 관한 연구
김창진,오광백,정용환,Kim, Chang-Jin,Oh, Gwang-Baek,Jung, Young-Hwan 한국군사과학기술학회 2010 한국군사과학기술학회지 Vol.13 No.5
Object Generator is a software to provide simulation object data(aircraft, ship, submarine, missile, torpedo) for sumulators in LBTS(Land Based Test System). but there is a burden to the system, because Object generator needs to send many object's data, display objects in a tactical screen, show object's information in a list in 1 second. This paper suggests a parallel software structure taking a few factors(deadlock, dependency) into consideration. At last, the paper shows the performance of the parallel structure's software compared with the former structure's software.
다수/다차원 격자형데이터를 이용한 해상도 변환의 효율적 방안 연구
김창진,오광백,나영남,Kim, Chang-Jin,Oh, Gwang-Beak,Na, Young-Nam 한국군사과학기술학회 2013 한국군사과학기술학회지 Vol.16 No.2
In counterfire warfare, it is important to detect and attack enemy targets faster than the enemy using sensing The grided environmental data is usually provided by the numerical simulation coupled with a data assimilation technique and various inter- or extrapolation algorithms, both of which are based on the observation spanning from simple equipments to satellites. In order to employ the gridded environmental data in the M&S system frequently cutting area and changing its resolution, interpolation algorithms such as linear, cubic spline, IDW, and Kriging methods are necessary to apply. These methods, however, require much time in the M&S system. This paper introduces a technic to reduce time to change the resolution of data. using the binary search method, which finds a point to interpolate quickly and interpolate data in the vicinity of. We also show the efficiency of proposed methods by way of measuring the respective elapsed times.
김형길,오광제,정덕자,정동균,방규태,최웅승,백용아,최조영 대한감염학회 1991 감염 Vol.23 No.4
Emphysematous pyelonephritis is a rare, life treating necrotizing infection of renal parenchyme and perirenal tissue. The disease is encountered mainly in diabetics with or without urethral obstruction and is characterized by parenchymal necrosis and spontaneous gas formation. Herein we report a case of Emphysematous pyelonephritis which occurred in 45-year-old diabetic woman and caused by Enterobacter. The patient was managed with fluids, insulin and antibiotics, followed by incision and drainage and resulted in recovery.
김기완,이우일,이건일,오광백 경북대학교 전자기술연구소 1989 電子技術硏究誌 Vol.10 No.1
Polycrystalline thin film CdS/CdTe heterojunction solar cells were fabricated by vacuum thermal evaporation method. We investigated the electrical and optical properties and solar energy conversion efficiency of the cells, varying the thickness and substrate temperature of CdS and CdTe layer and annealing temperature. All sells showed high conversion efficiency. The solar cell is composed of CdS and GdTe layer. Fabrication conditions of CdS layer are as follows : thickness of 0.45㎛, substrate temperature of 50℃ and average deposition rate of 600Å/min. The CdTe layer fabrication conditions are as follows : thickness of 1.5㎛, substrate temperature of 200℃ and average deposition fate of 1260Å/min. the cell annealed at 450℃ for 60min. showed maxium conversion efficiency of 9.2% under illumination of 25㎽/㎠ standard tungsten light source. And the cell had open circuit output voltage(Voc)of 1.2V, short circuit output current density(Jsc) of 3.6㎃/㎠ and fill factor(FF) of 0.53. It is suggested that the fabricated CdS/CdTe heterojunction solar cells will be applied to terrestrial solar cell.