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김상남,오규환,나형용,김영태 대한금속재료학회(대한금속학회) 1996 대한금속·재료학회지 Vol.34 No.1
It has been known that lead causes hot shortness of copper. Recent continuous casting process of copper scrap for electrical purpose needs to maintain lead content of copper rod above 400 ppm to avoid hot shortness and casting defects. In this study, to discover the effect of lead on the high-temperature mechanical properties of copper, five kinds of copper test samples with different lead content were made and tested at 850℃ with various cross head speeds. At low cross head speed, lead caused hot shortness of copper and mechanical properties of specimens containing lead were worse than those of pure copper, but at high cross head speed, 600 ppm of lead improved mechanical properties of copper. And mechanical properties of specimen containing 600 ppm of lead were comparable to those of pure copper.
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김상남,하성철 한국조명전기설비학회 1999 조명·전기설비학회논문지 Vol.13 No.2
$ SF_6$ 가스의 전자에너지 분포함수를 평균에너지 평형 영역에 대하여 E/N=500~800[Td]에서 해석하였다. 본 논문은 저자들에 의해 결정된 충돌 단면적을 사용하여 몬테칼로 시뮬레이션과 볼쯔만 방정식에 의해 E/N=150~800[Td]범위에서 계산된 $ SF_6$ 가스의 전자 수송 특성과 TOF법에서 구한 전자군 파라미터 값들을 나타냈다. 전자이동속도 전자 이온화 또는 부착계수, 종.횡 방향 확산계수 등의 전자군 파라미터 값들은 E/N 범위에서 실험 치와 이론 치가 일치하였다. 전자사태의 특성은 전자에너지의 비평형 영역에서 고려되었다. The electron energy distributions function were analysed in sulIitur hexaflowide at E/N : 500~800(Td) for a case of non-equilibrium region in the nran electron energy. This papa- describes the electron transport characteristics in $ SF_6$ gas calculated for range of E/N values from 150~800(Td) by the Monte Carlo simulation and Boltzmann equation Irethod using a set of electron collision cross sectioos determined by the authors and the values of electron swarm parameters. The results gained that the value of an electron swarm parameter such as the electron drift velocity, the electron ionization or attachment coefficients, longitudinal and transverse diffusion coefficients agree with the experimental and theoretical for a range of E/N. The properties of electron avalanches in an electron energy non-equilibrium region.region.
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김상남 학습자중심교과교육학회 2022 학습자중심교과교육연구 Vol.22 No.23
Objectives The purpose of this study was to verify the experience of ‘aging-well’ for a early sixties. Subject of this study was six early sixties who live in Daegu. Methods The data was collected by depth interview of experience of ‘aging-well. sixty years old woman who get marriage in city of D. if you have any question, I did telephone counseling more. The data collected was analysis using phenomenological method be due to Colaizzi(1978). Results The result were five meaning that ‘going with aging’, ‘living dependent another big power’, ‘active encount’, ‘walking positively in aging’, ‘a ripe persimmon as a beautiful human’. Conclusions we fond participant is living by acceptant aging and dependent another big power about ‘aging-well’. so I suggest to study expanded participant as a more old person and male.
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시뮬레이션에 의한 CF<sub>4</sub>, CH<sub>4</sub>, Ar혼합기체(混合氣體)에서 전자(電子)에너지분포함수
김상남,Kim, Sang-Nam 대한전기학회 2003 전기학회논문지 P Vol.52 No.1
Energy Distribution Function in pure $CH_4$, $CF_4$ and mixtures of $CF_4$ and Ar, have been analyzed over a range of the reduced electric field strength between 0.1 and 350[Td] by the two-term approximation of the Boltzmann equation (BEq.) method and the Monte Carlo simulation (MCS). The results of the Boltzmann equation and the Monte Carlo simulation have been compared with the data presented by several workers. The deduced transport coefficients for electrons agree reasonably well with the experimental and simulation data obtained by Nakamura and Hayashi. The energy distribution function of electrons in $CF_4-Ar$ mixtures shows the Maxwellian distribution for energy. That is, $f(\varepsilon)$ has the symmetrical shape whose axis of symmetry is a most probably energy. The measured results and the calculated results have been compared each other.
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CF<sub>4</sub>, CH<sub>4</sub>, Ar 혼합기체의 전자이동속도
김상남,Kim, Sang-Nam 대한전기학회 2011 전기학회논문지 P Vol.60 No.3
Drift Velocity of Electrons in pure $CF_4$, $CH_4$ and mixtures of $CF_4$ and Ar. Have been analyzed over a range of the reduced electric field strength between 0.1 and 350[Td] by the two-term approximation of the Boltzmann equation (BEq.) method and the Monte Carlo simulation (MCS). The results of the Boltzmann equation and the Monte Carlo simulation have been compared with the data presented by several workers. The deduced transport coefficients for electrons agree reasonably well with the experimental and simulation data obtained by Nakamura and Hayashi. The energy distribution function of electrons in $CF_4$-Ar mixtures shows the Maxwellian distribution for energy. That is, f(${\varepsilon}$) has the symmetrical shape whose axis of symmetry is a most probably energy. The measured results and the calculated results have been compared each other.
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김상남 한국정신과학학회 2003 한국정신과학회 학술대회 논문집 Vol.18 No.-
본 에너지 창출장치는 원적외선 방사체로 외벽을 구생하여 밀폐된 공간의 연소질을 만든 후 내부 중앙에 발열부를 설치하고 브라운가스발생기에서 생산하는 브라운가스로 발열부를 가열하는 장치이며 브라운가스로 발열부를 가열하연 발열부전체가 벌겋게 가열되어 고온으로 올라가고 연소실 외역은 발열부의 복사열에 의해 간접 가열되어 원적외선을 방사하게 되고 원적외선에 의해 발열부는 여러 번 가열되는 효과를 얻게 되어 발열부는 점점 더 고온으로 올라간다. 브라운 가스는 연소 후 고온의 수증기가 되고 발열부 내부를 통과하는 고온의 물분자는 일정 파장의 적외선을 흡수하여 더욱 더 고온으로 발전하면서 수소와 산소로 열분해 되고 재결합하는 연소 싸이클을 반복하므로 순환연소하여 막대한 열을 창출하게 된다. 다시 말하면, 물을 전기분해하여 브라운가스를 만들고 브라운가스로 발열부를 가열 하여 연소시키면 브라운가스가 타서 물이 되고 물이 타면 다시 물이 되므로 불은 순환 연소하면서 막대한 에너지를 창출하게 되는 것이다.
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김상남 대한전기학회 2015 전기학회논문지 P Vol.64 No.3
Energy distribution function for electrons in SF6-Ar mixtures gas used by MCS-BEq algorithm has been analysed over the E/N range 30~300[Td] by a two term Boltzmann equation and a Monte Carlo Simulation using a set of electron cross sections determined by other authors experimentally the electron swarm parameters for 0.2[%] and 0.5[%] SF6-Ar mixtures were measured by time-of-flight(TOF) method, The results show that the deduced longitudinal diffusion coefficients and transverse diffusion coefficients agree reasonably well with theoretical for a rang of E/N values. The results obtained from Boltzmann equation method and Monte Carlo simulation have been compared with present and previously obtained data and respective set of electron collision cross sections of the molecules.
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김상남,후랭크 W. 스코필드,Kim Sang Nam,Schofield Frank W. 대한수의사회 1961 대한수의사회지 Vol.5 No.2
The public veterinarians in Kohung. and Soonchon areas in Cholla Namdo reported a contagious skin disease in Korean native cattle. the causative agent of which was unknown. The authors visited the areas in November 1959, and made a survey on the epizootio
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