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구배가 없는 신배수시스템의 제안 및 배수유동 특성에 관한 실험적 연구
차영호,이정재 대한설비공학회 2005 설비공학 논문집 Vol.17 No.5
In Korea, pumping pipe using gravity way by water is most popular method in drainage system. But, it is difficult to repair a drainpipe in this method because the drain pipe diameter is increased as using this method. In this research, we propose a new drainage system. The system aim for an adaptedness with buildings, freedom of plan, construction and renewal in water pipe equipments, etc. The new system is not need of incline of piping, and it uses drainage power that is changed potential energy by high velocity flow as making Siphonage at vertical pipe. Therefore, the diameter of piping can decreased than existing piping system established in the ceiling. Also because connecting position will be located at the lower part, it is changed the potential energy of drainage to the high velocity flow. In addition, drainage will be smooth because the fixture drain is linked by each drain pipes.
차영호,권태하,최혁환 한국전기전자재료학회 1998 전기전자재료학회논문지 Vol.11 No.8
Transient thermal analysis simulations are carried out using a modeling program to understand the human body model HBM ESD. The devices were simulated a one-dimensional device subjected to ESD stress by solving Poison's equation, the continuity equation, and heat flow equation. A ramp rise with peak ESD voltage during rise time is applied to the device under test and then discharged exponentially through the device. LDD and NMOS structures were studied to evaluate ESD performance, snap back voltages, device heating. Junction heating results in the necessity for increased electron concentration in the space charge region to carry the current by the ESD HBM circuit. The doping profile adihacent to junction determines the amount of charge density and magnitude of the electric field, potential drop, and device heating. Shallow slopes of LDD tend to collect the negative charge and higher potential drops and device heating.
국내산 조사료의 세포막구성물질조사 1 . 목초류의 세포막구성물질함량
차영호,강태홍 ( Y . H . Cha,T . H . Kang ) 한국축산학회 1986 한국축산학회지 Vol.28 No.10
In order to estimate the content of structural carbohydrates in forages produced in Korea. the analyses were carried out for 8 grasses and 4 legume forages at pasture in Livestock Experiment Station. The results obtained were as follows. 1. NDF, ADF, lignin and cellulose of grass forages considerably increased when their life stages progressed; 46 to 72%, 24 to 44%, 3 to 8% and 18 to 34%, respectively. 2. NDF, ADF, lignin and cellulose of legume forages changed less than those of grasses forages; 29 to 55%, 20 to 35%, 4 to 11% and 18 to 34%, respectively.