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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.
개체단위모델과 부대단위모델 간 연동방안 연구 : 사단급 L-C연동 훈련사례를 중심으로
차영호,한봉규,신웅섭,김기성 육군사관학교 화랑대연구소 2024 한국군사학논집 Vol.80 No.1
L-C연동의 대상이 되는 각 모델의 해상도는 동일해야 한다. 그러나, 2022년에 실시한 사단급 L-C연동 훈련에서는 개체단위모델인 KCTC체계(L체계)를 부대단위모델인 창조21모델(C체계)과 연동하기 위한 시도가 있었다. L체계 전투현장에서 생성된 각 개체정보는 중대단위로 합산된 부대정보(부대 중심점과 부대 전투력) 형태로 C체계에 전송되었고 이러한 산술평균 논리는 훈련에 제한사항을 유발하였다. 즉, 실제 개체가 없는 곳이나 개체가 기동할 수 없는 곳에 부대 중심점이 산정된 경우가 있었으며, 이러한 상황은 C체계 내에서 운용된 정보자산 및 화력자산에 비현실적인 상황을 조성하였다. 본 연구에서는 2027년 이후 적용될 사단급 LVC연동훈련의 실전성을 높이기 위한 연동방안을 3가지 측면에서 고찰한다. 먼저, 창조21모델의 개체(분대)단위 모의 가능성을 검증하였으며, 산술평균을 대체하여 K-Means알고리즘을 적용한 부대 중심점 산정논리를 제안하고 마지막으로 병과별로 부대 중심점 산정제대를 구분하는 방안을 제안한다. The resolution of each model involved in the L-C interoperation must be identical. However, in the L-C interoperation training conducted in 2022, there was an attempt to integrate the entity-level model of the KCTC system (L-system) with the unit-level model of the ChangJo-21 model (C-system). Each entity data generated on the L-system battlefield was transmitted to the C-system in the form of aggregated unit information (unit center point coordinates and unit combat power) at the divisional level. This arithmetic mean logic imposed limitations on the training. In other words, there were cases where unit center points were calculated in places where there were no actual entities or where entities could not move. This situation created unrealistic situation in the intelligence assets and firepower assets operated within the C-system. In this study, we explore three aspects of the interoperation approach to enhance the practicality of division-level LVC training to be applied after 2027. Firstly, we verify the feasibility of simulating entity(squad) in the ChangJo-21 model. Secondly, we propose a logic for calculating unit center point coordinates by applying the K-Means algorithm instead of arithmetic mean, and finally, we suggest an approach to distinguish center point coordinate calculation rules based on branches.
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.