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심규성,명광식,김정덕,김종원 한국공업화학회 2002 응용화학 Vol.6 No.1
Development of effective hydrogen storage technology is essentially needed to establish an efficient hydrogen energy system connected to the technologies of hydrogen production and utilization. Generally, hydrogen storage technology can be divided into 3 principal methods using compressed hydrogen, liquefied hydrogen, and metal-hydrided hydrogen, and currently, all of these hydrogen storage methods have been developed and commercially used. The hydrogen storage method using compressed hydrogen has been the most prevailing so far, but due to its safety problem following the use of high pressure(ca. 15MPa), the hydrogen storage method employing metal hydrides has also been investigated and improved consistently. In this study, a hydrogen storage tank that can store 5,000ℓ of hydrogen gas has been designed and manufactured, and its capability to be used as an efficient hydrogen storage container has been reviewed. The alloy, the formula of which is MmNi_4.7Al_0.3(Mm=misch metal), has been manufactured in the high-frequency induction heating vacuum furnace. The structure of the tank is inside-finned tube bundle type with 24 alloy particle packed tubes.
Retargetable Compiler를 위한 중간언어의 설계 및 구현
이상정,심현규 순천향대학교 부설 산업기술연구소 1998 순천향 산업기술연구소논문집 Vol.3 No.3
This paper describes a design and implementation of a intermediate code for a retargetable compiler. A retargetable compiler has capability for emitting multiple target machine code. The intermediate code resembles assemblely code of RISC style machines and has three address code. The intermediate code includes symbol informations. This symbol informations helps additional optimizing phases. The intermediate code generator emits intermediate code and intermediate code simulator simulates it. Generated code's validation is tested by intermediate code simulator.
이원규,심재명,김상진 大田産業大學校 1997 한밭대학교 논문집 Vol.14 No.1
There were a few works on computation of capacitance in electrostatic problems using method of moments. Point matching method was introduced at first, which calculate charge distributions on planar conflicting surface divided into small rectangles. This method could be applied to limited geometry. For this, it was presented that a method dividing conductor surface into triangular area can be applied in plate objects. Point matching method was also used. In this paper charge distributions and capacitance are computed with rectangular and triangular area functions, and accuracy is investigated. Point matching and Galerkin's method are used for testing. When integrating, approximate and numerical method were carried out and the convergence was observed. Pulse function and impulse or pulse function for testing. When field and source points coincide, the integration was done analytically, by doing this sample results were obtained and generalized for numerical integrations. For example in applications, the convergence of solution was investigated for rectangular plate and capacitance was compared with that of circular disk which has exact value.
수아세포종의 예후에 영향을 미치는 요인 분석 : An Analysis of Factors Influencing on Its Prognosis
조병규,왕규창,김일한,이상일,심보성,최길수 대한신경외과학회 1988 Journal of Korean neurosurgical society Vol.17 No.5
Authors analyzed the results of treatment in 49 cases of medulloblastoma who had been operated upon at the Seoul National University Hospital from January 1972 to June 1987. There were 2 cases(4%) of postoperative mortality(death within postoperative one month) and 13 cases of late moratlity. The 3-year overall survival rate was 49.3% and 3-year disease-free survival rate was 48.5%. The risk period of recurrence was about 2 years after surgery. The 3-year survival rate was significantly better in "gross total resection" group, "radiation dose more than 50 Gy" group, and groupⅡ(23 cases operated after July 1982) (p<0.05). The rate of posterior fossa recurrence was lower in "gross total resection" group for the patients who received posteror fossa irradiation of more than 50 Gy.
Ti Mesh 처리 촉매전극을 이용한 고체고분자 전해질 전기분해 특성연구
심규성(Kyu Sung Sim),김연순(Youn Soon Kim),김종원(Jong Won Kim),한상도(Sang Do Han) 한국수소및신에너지학회 1996 한국수소 및 신에너지학회논문집 Vol.7 No.1
Alkaline water electrolysis has been commercialized as the only large-scale method for a long time to produce hydrogen and the technology is superior to other methods such as photochemical, thermochemical water splitting, and thermal decomposition method in view of efficiency and related technical problem. However, such conventional electrolyzer do not have high electric efficiency and productivity to apply to large scale hydrogen production for energy or chemical feedstocks. Solid polymer electrolyte water electrolysis using a perfluorocation exchange membrane as an H<sup>+</sup> ion conductor is considered to be a promising method, because of capability for operating at high current densities and low cell voltages. So, this is a good technology for the storage of electricity generated by photovoltaic power plants, wind generators and other energy conversion systems. One of the most important R&D topics in electrolyser is how to minimize cell voltage and maximize current density in order to increase the productivity of the electrolyzer. A commercialized technology is the hot press method which the film type electrocatalyst is hot-pressed to soild polymer membrane in order to eliminate the contact resistance. Various technologies, electrocatalyst formed over Nafion membrane surface by means of nonelectrolytic plating process, porous sintered metal(titanium powder) or titanium mesh coated with electrocatalyst, have been studied for preparation of membrane-electrocatalyst composites. In this study some experiments have been conducted at a solid polymer electrolyte water electrolyzer, which consisted of single cell stack with an electrode area of 25cm² in a unipolar arrangement using titanium mesh coated with electrocatalyst.
심규성(Kyu Sung Sim),김종원(Jong Won Kim),김연순(Youn Soon Kim),박기배(Ki Bae Park) 한국수소및신에너지학회 1995 한국수소 및 신에너지학회논문집 Vol.6 No.1
Chemical heat pump is one of the energy conversion technologies, which enables to use waste heat as a source of high grade heat. In 2-propanol/acetone system, the dehydrogenation of 2-propanol is an endothermic(heat absorption) reaction, and can be used to generate hydrogen because 2-propanol can be converted to acetone and hydrogen at low temperature(about 8℃) using catalyst. For the dehydrogenation of 2-propanol 5% Ru catalyst based on activated carbon is the best one at the reaction temparature of 83℃.