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RISS 인기검색어
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- 저자 : 문용식(Y. S. Moon) (검색결과 6 건)
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洪致裕,姜泰遠,文龍植 동국대학교 재료과학연구소 1983 材料科學硏究所 論文集 Vol.3 No.-
화산석과 화산석 유리에서 철의 상태에 대해 Mo¨ssbauer 효과를 연구하였다. 화산석에서 Fe^2+ 이온에 기인되는 Q.S.는 화산석 유리에서 한 개의 splitting으로 변하였다. 화산석에서의 I.S.와 Q.S.는 화산석 유리에서 보다 작게 되었다. The state of iron in volcanic rock and volcanic rock glasses was studied by Mo¨ssbauer spectroscopy. Two quadrupole splittings due to Fe^2+ ion in volcanic rock were changed to one splitting in volcanic rock glass. Isomer shift and quadrupole splitting in volcanic rock were changed smaller in volcanic rock glass.
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BaFe₂O₄의 Mossbauer Spectrum 연구
박경원,홍치유,백승도,문용식 동국대학교 자연과학연구소 1987 자연과학연구 논문집 Vol.7 No.-
본 논문에서는 BaFe₂O₄를 제작하여 X-ray 회절선을 측정하여 구조를 확인하여, 저온에서의 Mossbauer spectrum을 측정하여 구한 center shift값과 quadrupole splitting값 및 magnetic hyperfine field값들의 온도에 따른 변화를 조사하였으며, center shift값의 온도의존성을 이용하여 BaFe₂O₄의 Debye온도와 Dinstein온도의 결정하였다. In this study, the X-ray diffraction pattern and the Mossbauer parameters of BaFe₂O₄was prepared by a ceramic sintering method. The X-ray diffraction pattern has shown that the BaFe₂O₄has the orthorhombic sturcture. The center shift values and magnetic hyperfine fields were increased as the temperature decreased. But the quadrupole splitting values were constant regardless of the temperature variance. The Debye and Einstein temperatures of BaFe₂O₄which were determined by the kinetic temperature and the center shift values, were 460K and 364K respectively.
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문용식,정현규,주영상,이종포 韓國非破壞檢査學會 1986 한국비파괴검사학회지 Vol.6 No.1
The application and development of on-line monitoring technology of AE to surveillance of crack propagation will contribute to the structural integrity of reactor pressure vessel and piping system. This research has been performed in order to obtain the evaluation technology for source location of AE and the analysis for the AE signal of the welded specimen. AE is detected by 4-channels AE system durng pressurization in small pressure vessls. The cracking of artificial defects can be accurately located and categorized in real time. The welded specimens have more events rate and higher amplitude than the weldless less specimens, and the events rate have a peak around the yield point and just before the failure under tensile test.
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NaCl 및 N.P.K施用이 호밀과 겨자種의 發芽 및 初期生育에 미치는 影響
김수명,김관수,문용식 大田大學校 1984 論文集 Vol.3 No.1
The experiments were conducted to investigate the effects of N.P.K and NaCl application on germination and early growth of rye and mustard plants. The results obtained are as follows : Both rye and mustard germination rate dropped remarkably with salt concentration over 1.0% NaCl ; the limit for salt concentration in rye was 2.0%, mustard was 1.5% NaCl. Germination rate is higher in 1.0% sea water than in 1.0% NaCl salt concentration and growth is good. Germination rate and amount of growth increased more in the control plot than in those with a low degree of salinity of 0.5% NaCl. In accordance with the degree of salinity the T/R ratio increased ; the T/R ratio was higher in rye than in mustard. Low degree of salinity of below 0.5% NaCl had a short germination period of 1 day after sowing but a high degree of salinity of over 1.0% NaCl lengthened the germination period to 5 -7 days after sowing. In accordance with the degree of salinity increased ; the calculated germination speed dropped, at a low degree of salinity of below 0.5% it was remarkably higher in mustrard than in rye. In mixed application, N.P.K with 0.8 % NaCl solution showed a more sensitive response in growth and germination than N.P.K with 0 % NaCl solution. The influence of inorganic salt on germination and early growth of plant body was KCl>P>Urea in that order.
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The Mossbauer Effect on Iron in Volcanic Rock
Kang,T.W.,Hong,C.Y.,Moon,Y.S. 동국대학교 자연과학연구소 1983 자연과학연구 논문집 Vol.3 No.-
화산석과 화산석 우리에서 철의 상태에 대해 Mossbauer 효과를 연구하였다. 화산석에서 Fe?이온에 기인되는 Q.S.는 화산석유리에서 한개의 splitting으로 변하였다. 화산석에서의 I.S.와 Q.S.는 화산석 유리에서 보다 작게 되었다. The state fo iron in volcanic rock and volcanic rock glasses was studied by Mossbauer spectroscopy. Two quadrupole splittings due to Fe? ion in volcanic rock were changed to one splitting in volcanic rock glass. Isomer shift and quadrupole splitting in volcanic rock were changed smaller in volcanic rock glass.
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