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      • 하나로에서의 NTD조사를 위한 중성자속 평탄화 장치의 최적화를 위한 예비분석

        송영동,이헌주,이병철,전병진,김학노 제주대학교 산업기술연구소 2001 尖端技術硏究所論文集 Vol.12 No.1

        NTD(Neutron Transmutation Doping) method has several advantages of high resistivity and uniform doping in comparison with other method. To satisfy those conditions, the flux variations of radial and axial directions should be within ±5% and ±1.7%. respectively. The NTD facility in HANARO is purposed to irradiate the silicon ingot of 60cm in height. Hence, the flux flattener will be designed for 60cm. In this paper, preliminary study for optimal design is showed and the flux distribution of axial direction is calculated using MCNP4B code. The results show that the flattener model can flatten the flux to 83% of total length.

      • 하나로에서의 NTD 조사를 위한 중성자속 평탄화 장치의 최적화를 위한 예비분석

        송영동,이헌주,이병택,전병진,김학노 濟州大學校 産業技術硏究所 2001 산업기술연구소논문집 Vol.12 No.1

        NTD (Pieutron Transmutation Doping) method has several advantages of high resistivity and uniform doping in comparison with other method. To satisfy those conditions. the flux variations of radial and axial directions should be within ±5 % and ±1.7%. respectively. The NTD facility in HANARO is purposed to irradiate the silicon ingot of 60cm in height. Hence. the flux flattener will be designed for 60cm. In this paper. preliminary study for optimal design is showed and the flux distribution of axial direction is calculated using MCNP4B code. The results show that the flattener model can flatten the flux to 83% of total length.

      • SCOPUSSCIEKCI등재

        신경외과 영역에서의 접착성 지혈제가 주변뇌조직에 미치는 영향에 대한 실험적 연구

        장헌상,김관태,송시헌,김성호,김윤 대한신경외과학회 1991 Journal of Korean neurosurgical society Vol.20 No.10-11

        In a series of 20 young rats, three cortical lesions were made in each hemisphere. Two of these lesions were filled with avitene and gelfoam, while the third was left empty as a control. The animals were killed successively on weeks 1, 2, 4 and 8 after the operation. The results were as follows : 1) Although there was no difference in the type of tissue reactions, avitene was more rapid and profound than gelfoam in the process and degree of inflammatory reaction at the same periods. 2) Avitene biodegradaded more rapidly than gelfoam. 3) The extent of fibrosis and adhesion to the surrounding brain tissues were not grossly different between these two agents but more profound histopathologically in avitene at the same periods. With these results, we could conclude that the avitene was superior to the gelfoam as the hemostatic agent in neurosurgical area.

      • 建物에너지 性能基準의 改善方案 硏究

        柳憲馨,張文碩,閔晶鉉,宋寅春 忠南大學校 産業技術硏究所 1996 산업기술연구논문집 Vol.11 No.2

        Since the end of 1970s a lot of energy related regulations and measures for energy conservation of buildings was prescribed and abolished. But to ensure that the substantial energy conservation is accomplished, it is necessary to ensure that not only the regulations and measures have to be observed favourably but also they might be investigated through the process of post evaluation. The study for the purpose of post evaluation of present using regulations and measures could be summarized as following results. ·In the aspect of the performance standard against our component standard energy rating method of existing detached houses was suggested. ·Some fallacies on the calculation of annual heating and cooling load of apartments were pointed out and their improvements were presented. ·By the recent amendment of Code for design guideline of office buildings, unreasonableness on the existing Code was analyzed and its improvements are prepared. ·Unreasonableness of Energy Performance Index as a energy evaluation tool of buildings was investigated and analyzed.

      • 旣存住宅의 에너지 效率等級表示制度 硏究 (Ⅱ)

        柳憲聲,長文碩,宋寅春 忠南大學校 産業技術硏究所 1995 산업기술연구논문집 Vol.10 No.1

        The objective of the study is to present a certain method that could be classfied the existing detached houses over 5 millions in our country by their energy efficiency. The method, will be called KHEES(Korean Home Energy Evaluation System), will contribute to save energy in residences effectively and will change the passive attitude of home owner's energy saving mind to the active one. The principal scope and the results of this study are as follows. - Gathering of project-related data including papers, reports and existing home energy rating systems of developed countries has done. - Field survey for the existing 71 detached houses in the country was done to examine their building data and their present situation of energy use, analysis and calculation for the yearly energy consumption rate of existing houses has done. - Reference house was designed by using various data such as national census results, building regulation and social indicator. - Energy performance index of existing detached houses was made out in thru of energy analysis program. - Energy rating system that could be classified the existing detached houses was set up. - A reference house of 89㎡ is designed, and its annual energy consumption rate which will be used as a tool of comparison is calculated. - From the comparison of the energy consumption rate between the reference house and the existing detached houses, the fact that the annual energy consumption rate of the existing detached houses are more from 5.7% at minimum to 57.8% at maximum than that of the reference house. - The existing detached houses was classified into three groups according to their construction year such as before 1979, from 1979 to 1987 and after 1988. The comparison result of annual energy consumption rate among three groups shows the rate of preceeding group is less about 9.0% and 8.1% respectively than the rate of succeeding group. - As the energy rating method of existing detached houses, energy certificate issuing system, energy performance rating system classified by yearly energy consumption rate marking system indicated by energy performance were presented.

      • 장벽경색이 선행한 Henoch-Schonlein 자반증 1례

        한헌석,하태선,송형근,이상전,안묘순,박범수 충북대학교 의과대학 충북대학교 의학연구소 1993 忠北醫大學術誌 Vol.3 No.1

        Henoch-Schonlein 자반증은 피부, 위장관, 관절, 신장 등을 주로 침범하며 소혈관염을 기본 병리 소견으로하는 전신성 혈관 장애 질환이다. 위장관계 증상으로는 복통, 오심 및 구토, 잠혈, 토혈, 흑색변 등이 있을 수 있고, 이러한 증상은 합병증 없이 회복되는 것이 보통이나 드물게는 장중첩증, 장벽경색 및 괴사, 장천공 등의 심한 합병증을 동반할 수도 있다. 이러한 위장관계 증상들은 특징적인 피부 소견에 선행하여 나타날 수도 있으며, 이때는 급성복증에 대한 감별진단이 중요하다. 저자들은 장벽경색이 선행하여 감별진단에 어려움을 겪고 시험적개복술을 시행한 이후에 특징적인 피부 자반이 발현되어 Henoch-Schonlein 자반증으로 진단할 수 있었던 증례를 경험하였기에 이를 보고하고자 한다. 본 증례는 입원 1일전부터 시작된 복통을 주소로 입원한 5세 남아가 배꼽 주위에 심한 경련성 복통을 지속적으로 호소하였고 이학적 소견상 배꼽주위의 압통, 장음의 감소, 흑색변 등이 있었으며 소장조영술상 공장 부위에 미만성의 불규칙한 점막비후 소견을 보여 제 8병일에 시험적개복술을 시행한 결과 근위 공장에 국한된 장괴사의 소견이 발견되어 절제 및 문합술을 실시 하였다. 병리학적 검사에서는 장벽경색의 소견을 보였다. 수술후에 복통은 완화되었으나 경미하게 지속되었고, 제 13병일경에 급성 부고환염이 병발되었다가 회복되었고 제 15병일경에는 하지에서부터 발현된 자반이 3일간 지속되었다. 결구 Henoch-Schonlein 자반증과 이의 합병증으로 발생한 근위 공장의 장벽경색으로 진단하였다. Colicky abdominal pain as symptom of Henoch-Schonlein purpura occurs in up to 70% of patients, and results from submucosal edema and hemorrhage. Abdominal pain and other GI symptoms such as nausea, vomiting, melena and hematemesis resolve mostly without any complications. But rarely life-threatening GI complications such as intussusception, intestinal mural infarction and necrosis, and massive hemorrhage may develope. In 14% of patients, abdominal pain may precede other symptoms, and creats diagnostic difficulties. We reports a case of the Henoch-Schonlein purpura presented with colicky abdominal pain which resulted from intestinal mural infarction and preceded characteristic purpuric skin lesion by several weeks. This 5 year old male patient complained of colicky abdominal pain, nausea and melena. Exploratory laparatomy was done and revealed intestinal mural infarction in proximal jejunum. One week later operation, purpuric skin lesion develiped in both leg and feet, and then, Henoch-Schonlein purpura was diagnosed.

      • 建物의 IAQ에 對한 考察

        柳憲聲,宋寅春 충남대학교 1990 論文集 Vol.13 No.1

        It is an age that we should pay attention to IAQ (Indoor Air Quality) of the building environment. Although extra-air-tight building appears to have little effect on IAQ, in some cases a small increase in pollutant concentrations can be harmful. For example, where high radon levels, large use of asbestos-containing building materials, or high levels of pollutant are presented, some efforts are required to improve IAQ. This paper reviews several points related to IAQ and indoor air pollutants having an influence on IAQ.

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