MWPC 위치검출기의 X-선 천체물리학에의 응용

남욱원,최철성,문신행,강희동 경북대학교 센서기술연구소 1990 센서技術學術大會論文集 Vol.1 No.1

1983 년경 국내에서도 과학탐사 로케트와 인공위성이 발사될 예정에 있으며 이에 따라 X-선 천체물리학을 위한 방사선 센서의 국내 개발이 시급히 요청되는 바이다. 따라서 현재 방사선계측에 많이 이용되고 있는 방사선 센서들 중 국내에서 개발되어온 MWPC위치검출기를 소개하고 인공위성 혹은 과학탐사로케트에 탑재되어 X-선 천체물리학연구에 이용될 경우 연구 개발되어 나가야 할 방향을 제시하고자 한다. Domestic sounding rocket and scientific satellite are scheduled to launch around 1993. The development of radiation sensor is required to observe X-rays coming from celestial bodies by the use of those space vehicleS. In this study we introduce the multi-wire position sensitive detector and the future works of onboard detector for X-ray astrophysics.

일차배양 간세포를 이용한 Nitric Oxide(NO)의 항산화 활성 및 약물대사 효소에 미치는 영향

남성윤,정연봉,김동석,이종철 慶星大學校 1996 論文集 Vol.17 No.2

The purpose of the present study was to determine the antioxidative activity and effects on drug metabolism of nitric oxide. In experiments, the incubation of isolated rat hepatocytes with lipopolysaccharide(LPS) resulted in the slight inhibition of lipid peroxidation but superoxide productivity not affected. Also LPS increased intracellular glutathione and glutathione S-transferase activity. In contrast, N??-monomethyl-L-Arginine (L-NMA), an inhibitor of both the constitutive and inducible nitrix oxide synthases, decreased in lactate dehydrogenase. And, LPS inhibited increasse of ethoxycoumarin O-deethylase activity by phenobarbital, but other monooxygenase activity not affect. Treatment of L-NMA to phenobarbital -pretrteated rat hepatocytes results in slight increase of cytochrome P-450 I Al specific enzyme ethoxyresorufin O-deethylase activity.

천체 관측용 대면적 X-선 비례계수관의 개발(I)

남옥원,최철성,문신행 경북대학교 센서기술연구소 1991 센서技術學術大會論文集 Vol.2 No.1

In order to observe celestial X-ray sources, we are going to develop a large area proportional counter as a payload of space vehicles such as sounding rocket, balloon and scientific satellite. In this study, we reviewed the proporties of X-ray sources and cosmic background, and we studied the conceptual design for a large area proportional counter.

굴껍질을 이용한 고농도 중금속 폐수처리에 미치는 pH의 영향

성낙창,신남철,최장승 동아대학교 환경문제연구소 1996 硏究報告 Vol.19 No.2

The purpose of this research is to examine the utilization of oyster shells for the removal of high concentrated heavy metals in an acidic·alkali system wastewater. because oyster shells have been known to be very porous, to have high specific surface area and to have alkaline minerals such as calcium and mangnesium. It could be showed that most of heavy metals intended to increase removal rate with pH increase, but maintained equilibrium and heavy metals were removed high. In 7g and 9g, desorptions were caused by the weak physical coherence of heavy metals. Solubilites of heavy metals increased with Fe>Cu>Cr and Fe removal rate was higher than other heavy metals, because removal rate was influenced by- competitive reaction in same pH rather than solubility. In point of Ocean waste recyling, if oyster shells will use wastewater treatment of acidic and high concentrated heavy metals, they could look forward to an expected economical effect.

와이어 코일이 삽입된 나선형 내면가공관의 열전달 및 압력강하 성능평가

남상철 嶺南大學校 工業技術硏究所 2003 工業技術硏究所論文集 Vol.31 No.2

The characteristics of heat transfer enhancement and pressure drop through tubes have been investigated experimentally for a compound heat transfer enhancement. The test tubes were spirally indented(O.D.=15.88, 19.05mm) with wire coil inserts that had a various combinations of pitch and helix angle. Pure water and ethlylene glycol solution were used as working fluids. Heat transfer coefficients and friction factors of the test tubes were calculated from the values of measured temperatures, flow rates and pressure drops. EF and EPR, were evaluated to find an optimal combination of spirally indented tubes with wire coil inserts. When the helix angle of wire coil insert are 71° and 72°, the best heat transfer enhancement was achieved.

암남공원의 식물상과 삼림식생에 관한 연구

남정칠,박승범,김승환,강영조,이기철,이정아 동아대학교 환경문제연구소 1999 硏究報告 Vol.22 No.1

The objective of this study is to analyze the flora and forest vegetation of Amnam urban natural Park. 10 transects of quadrat of 10×10m were selected for the experiment. They were surveyed from January to October 1997. The obtained results were summerized as follows ; 1. The flora of plants distributed in Amnam Park was 88 families, 245 genus, 374 species. Dicotyledom in an angiosperm was 81.3% of total percentage was 73 families, 194 genus, 304 species, Monocotyledonous plant was 13.9% of total percentage was 7 families, 38 genus, 52 species, Gymnospermous plant was 2.1% of total percentage was 4 families, 5 genus, 8 species. Pteridophyta was 2.4% of total percentage was 3 families. 7 genus, 9 species, Shave grass was 0.3% of total percentage was 1 family, 1 genus, 1 species. 2. The representative wood plants of Amnam Park were Pinus thunbergii, Machilus thunbergii, Camellia japonica, Quercus spp., Celtis sinensis, Morus bombysis, Prunus sangentii, Sorbus alnifolia, Albizzia julibrissin, Juniperus rigida, Platycaya strobilacea, Lespedeza spp., Zanthoxylum piperitum, Zanthoxylum schinifolium, Rhus spp., Carpinus coreana, Mallotus japonicus. Ficus erecta, Pittosporum tobira, Eurya japonica. Elaeagnus macrophylla. 3. The area of plant community in Amnam Park was 84.29% in Pinus thunbergii community. 6.7% in Quercus dentata-Celtis sinensis community, 1.5% in Pittosporum tobira-Eurya japonica community, 1.4% in Quercus aliena-Prunus sargentii community, 1.29% in Pinus thunbergii-Pittosporum tobira community, 1.27% in Pinus thunbergii-Eurya japonica community.

어린이대공원 들쥐류의 生態에 관한 硏究

南廷七,朴承範,李其哲 東亞大學校 建設技術硏究所 2004 硏究論文集 Vol.27 No.2

This study was conducted four ecological survey of field mice of the Children's Grand Park in Busan Metropolitan city from June, 2002, to March, 2003 for the understanding of field mice damage to forest. The results are obtained as follows. 1. The species of field mice collected were Apodemus agraius coreae, Apodemus speciosus peninsulae and Clethrionomys rufocanus regulus and Crocidura suaveolens shantungensis of insectvore. 2. The total collecting rate were 3.6% collected 43 individuals of field mice from 1191 trap. 3. The rate among the 43 field mice collected were 76.7% in Apodemus speciosus peninsulae. 11.6%in Clethrionomys rufocanus regulus, 7.0% in Crocidura suaveolens shantungensis and 4.7% in Apodemus agraius coreae. 4. The constitution of weight of field mice was 30-35g in Apodemus agraius coreae, 18-45.9g in Apodemus speciosus peninsulae. 22-43.9g in Clethrionomys rufocanus regulus and 5-6g in Crocidura suaveolens shantungensis. 5. The ratio of male to female of field mice was 50% : 50% in Apodemus agraius coreae, 45.5% : 54.5% in Apodemus speciosus peninsulae. 60% : 40% in Clethr-ionomys rufocanus regulus and33.3% : 66.7% in Crocidura suaveolens shantungensis. 6. The average body lengh was 105.2mm in Clethrionomys rufocanus regulus. 100.5mm in Apodemus agraius coreae, 97.42mm in Apodemus speciosus peninsulae and 59.0mm in Crocidura suaveolens shantungensis. 7. The average tail lengh was 95.64mm in Apodemus speciosus peninsulae, 83.5mm in Apodemus agraius coreae, 41.0mm in Crocidura suaveolens shantungensis and 38.6mm in Clethrionomys rufocanus regulus. 8. The breeding period of field mice in the children's grand park presumes from about the early of March to end of October. 9. The average fetal number of field mice was 4.3 in Apodemus speciosus peninsulae and 4.0 in Clethrionomys rufocanus regulus.

MIS型 Microstrip에서의 크로스토크와 遲延에 관한 解析

남태철,차상학 嶺南大學校 工業技術硏究所 1989 연구보고 Vol.17 No.2

As the density and speed of integrated circuits are continuing to increase, it becomes important that microstrip interconnections can limit overall performance of an integrated system. In this paper, we analyzed crosstalk and propagation delay due to semiconductor thickness and resistivity in microstrip interconnection of MIS type, and investigated crosstalk and delay values in optimized interconnection conditions. In MIS structure interconnection, as the semiconductor thickness and resistivity were decreasing, crosstalk and propagation delay were reduced. Therefore, when the shielding plate is inserted between semiconductor and insulator, crosstalk and propagation delay give the same values as those of zero thickness of semiconductor. Inserting shielding ground plate, the interconnection whose geometric values are 10㎛ strip width, 10㎛ space and 10㎝length, has 7.6% crosstalk and 0.76 nsec propagation delay at 100㎒ frequency.

乘鹤山 들쥐類의 生態에 관한 硏究

南廷七,朴承節,金承煥,李其哲 東亞大學校 建設技術硏究所 2006 硏究論文集 Vol.29 No.2

This study was conducted four ecological survey of field mice of in Mt. Sunghak Busan City from October, 2004 to July, 2005 for the understanding of field mice damage to forest. The results are obtained as follows. 1. The species of field mice collected were Apodemus agrarills, and Eofhenomys regulus. 2. The total collecting rate were 2.5% collected 13 individuals of field mice from 510 trap. 3. The rate among the 13 field mice collected were 69.2% in Apodemlls agrarills, and 30.8% in Eothenomys regulus. 4. The constitution of weight of field mice was 18-4 1.9g in Apodemus agrarius and Eothenomys regulus. 5. The sex ratio of field mice was 55.6% 44.4% in Apodemus agrarills, and 25.0% 75.0% in Eothenomys regulus. 6. The average body, tail, hind foot, ear lengh was 9 1.0mm, 77.22mm, 20.22mm, 13.33mm in Apodemus agrarius, and 93 .5mm, 39.0mm, 18.25mm, 13 .0mm in Eothenomys regltllls. 7. The breeding period of field mice in Mt. Sunghak presumes from about April. 8. The average litter size of field mice was 5.0 in Eothenomys regulus.

Ventriculosubgaleal shunt의 임상적 경험

남궁원철,박상근,김태홍,신형식,황용순,김상진 인제대학교 백병원 2002 仁濟醫學 Vol.23 No.2

Object : Ventriculosubgaleal(VSG) shunt is considered to be useful and safe ventricluar diversion method for the patient for whom ventriculoperitoneal(VP) shunt cannot be carried out because of significant particulate debirs within the CSF, recent surgeries, or infections that were considered substantial enough to impair shunt function or to increase the risk of infection. To clarify the efficacy of VSG shunt for temporary ventricular decompression we analyzed our clinical trial cases. Patients and Methods : VSG shunt was carried out in 8 patient with acute hydrocephalus between February 2000 and June 2000. The causes of acute hydrocephalus were as follows: spontaneous intracerebral hemorrahage and intraventricular hemorrhage in four patients, spontaheous subarachnoid hemorrahge in three patients, tuberculous meningitis in one patient. With these 8 cases we compared pre-operative and post-operative clinical conditions and ventricular size in the brain CT scan. Results : Even though the ventricular size was not changed statistically there was significant clinical improvement between preoperative Glasgow coma scale(GCS)(7.25) and postoperative GCS(9.25). Six patients died as a result of causes unrelated to the VSG shunt. There were no VSG shunt infection. A permanent ventriculoperitoneal shunt surgery was needed in two patients. Conclusion : The VSG shunt is a simple and safe method of treatment for acute hydrocephalus instead of extraventricular drainage in the patients who cannot be underwent a permanent shunt immediately due to some reasons. Even though VSG shunt were free from infection, our preliminary clinical trials suggests that its efficacy seems to be doubtful. Further studies with lots of cases would be needed for its clinical application.