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황재순(Jae Soon Hwang) 한국식품영양과학회 1981 한국식품영양과학회지 Vol.10 No.1
This experiment was attempted to establish the optimal condition, e.g., the effects of pH, interferences of other elements, for the determination of the inorganic elements in the paddy soils by atomic absorption spectrophotometry.<br/> Inorganic elements of 100 paddy soils which were sampled in Jeon bug provincial farm land were determined by atomic absorption spectrophotometer in that condition.<br/> The results obtained in this experiment are summarized as follows:<br/> 1) The optimal pH for determination of inorganic elements in paddy soils is about 7.0.<br/> 2) It was investigated that the absorbance of potassium was increased, and that of calcium, magnesium and zine was decreased by adding of Fe^(++) and Cu^(++) in the sample.<br/> 3) It was shown that paddy soils in Jeonbug provincial farm land contain the normal amounts of inorganic elements (K, Ca, Mg, Zn,). But comparing to the results of 1976 year, it was known that the contents of inorganic elements in paddy soils considerably was changed.
차세대 메모리 디바이스Gap-Fill 공정 위한 공간 분할 PE-ALD개발 및 공정 설계
이백주(Baek-Ju Lee),황재순(Jae-Soon Hwang),서동원(Dong-Won Seo),최재욱(Jae-Wook Choi) 한국표면공학회 2020 한국표면공학회지 Vol.53 No.3
This study is for the development of high temperature ALD SiO₂ film process, optimized for gap-fill process in manufacturing memory products, using a space-divided PE-ALD system equipped with an independent control dual plasma system and orbital moving unit. Space divided PE-ALD System has high productivity, and various applications can be applied according to Top Lid Design. But space divided ALD system has a limitation to realize concentric deposition map due to process influence due to disk rotation. In order to solve this problem, we developed an orbit rotation moving unit in which disk and wafer. Also we used Independent dual plasma system to enhance thin film properties. Improve productivity and film density for gap-fill process by having deposition and surface treatment in one cycle. Optimize deposition process for gap-fill patterns with different depths by utilizing our independently controlled dual plasma system to insert N₂ and/or He plasma during surface treatment, Provide void-free gap-fill process for high aspect ratio gap-fill patterns (up to 50:1) with convex curvature by adjusting deposition and surface treatment recipe in a cycle.
PEM 연료전지 스택의 과도상태 출력특성에 관한 실험적 연구
김현일(Hyun-il Kim),황재순(Jae Soon Hwang),정태용(Tae-Yong Chung),신동훈(Donghoon Shin),남진현(Jin Hyun Nam),김영규(Young-Gyu Kim) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
The transient power characteristics of a PEM fuel cell stack was experimentally studied using a commercial 1.2kW PEM fuel cell (Nexa™ Power Module, Ballard Power System Inc.). The conditions in PEM fuel cell stack such as temperature and water content change rather slowly because of their large heat capacity and long channel length, which results in long transient time to converge to a steady state. The steady characteristics of the PEM fuel cell module was determined first, followed by the measurement of its transient characteristics upon stepwise and continuous load current changes. During the stepwise current change from 5A to 25A, the output voltage initially decreased below the steady voltage and then increased gradually. Similar behavior was also observed for the stepwise current change from 25A to 5A. This transient behavior is explained with reference to the evolution of the temperature and water content of the PEM fuel cell stack.
공간 분할 PE-ALD에서 증착된 저온 실리콘 질화물 박막의 Plasma Treatment 특성 연구
이백주(Baek-Ju Lee),황재순(Jae-Soon Hwang),서동원(Dong-Won Seo),최재욱(Jae-Wook Choi) 대한전자공학회 2020 대한전자공학회 학술대회 Vol.2020 No.8
In this study, the silicon nitride thin film deposited in the space division PEALD was studied in more depth. The defect density and impurity concentration of the silicon nitride thin film have a great influence on reading and writing information, so it was confirmed how it changes according to the process conditions. Plasma treatment was performed to improve the density and impurities of the silicon nitride thin film, and it was analyzed how Plasma Treatment affects the defect density and impurity concentration of silicon nitride.
M&S 지원을 위한 HEMOS-Cloud 서비스의 경제적 효과
정대용 ( Jung Dae Yong ),서동우 ( Seo Dong Woo ),황재순 ( Hwang Jae Soon ),박성욱 ( Park Sung Uk ),김명일 ( Kim Myung Il ) 한국정보처리학회 2021 정보처리학회논문지. 컴퓨터 및 통신시스템 Vol.10 No.10
Cloud computing is a computing paradigm in which users can utilize computing resources in a pay-as-you-go manner. In a cloud system, resources can be dynamically scaled up and down to the user’s on-demand so that the total cost of ownership can be reduced. The Modeling and Simulation (M&S) technology is a renowned simulation-based method to obtain engineering analysis and results through CAE software without actual experimental action. In general, M&S technology is utilized in Finite Element Analysis (FEA), Computational Fluid Dynamics (CFD), Multibody dynamics (MBD), and optimization fields. The work procedure through M&S is divided into pre-processing, analysis, and post-processing steps. The pre/post-processing are GPU-intensive job that consists of 3D modeling jobs via CAE software, whereas analysis is CPU or GPU intensive. Because a general-purpose desktop needs plenty of time to analyze complicated 3D models, CAE software requires a high-end CPU and GPU-based workstation that can work fluently. In other words, for executing M&S, it is absolutely required to utilize high-performance computing resources. To mitigate the cost issue from equipping such tremendous computing resources, we propose HEMOS-Cloud service, an integrated cloud and cluster computing environment. The HEMOS-Cloud service provides CAE software and computing resources to users who want to experience M&S in business sectors or academics. In this paper, the economic ripple effect of HEMOS-Cloud service was analyzed by using industry-related analysis. The estimated results of using the experts-guided coefficients are the production inducement effect of KRW 7.4 billion, the value-added effect of KRW 4.1 billion, and the employment-inducing effect of 50 persons per KRW 1 billion.