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Hot wall epitaxy방법에 의한 AgInS<sub>2</sub> 박막의 성장과 광전류 특성
김혜숙,홍광준,정준우,방진주,김소형,정태수,박진성,Kim, H.S.,Hong, K.J.,Jeong, J.W.,Bang, J.J.,Kim, S.H.,Jeong, T.S.,Park, J.S. 한국재료학회 2002 한국재료학회지 Vol.12 No.7
A silver indium sulfide ($AgInS_2$) epilayer was grown by the hot wall epitaxy method, which has not been reported in the literature. The grown $AgInS_2$ epilayer has found to be a chalcopyrite structure and evaluated to be high quality crystal. From the photocurrent measurement in the temperature range from 30 K to 300 K, the two peaks of A and B were only observed, whereas the three peaks of A, B, and C were seen in the PC spectrum of 10 K. These peaks are ascribed to the band-to-band transition. The valence band splitting of $AgInS_2$ was investigated by means of the photocurrent measurement. The crystal field splitting, $\Delta_{cr}$ , and the spin orbit splitting, $\Delta_{so}$ , have been obtained to be 0.150 eV and 0.009 eV at 10 K, respectively. And, the energy band gap at room temperature has been determined to be 1.868 eV. Also, the temperature dependence of the energy band gap, $E_{g}$(T), was determined.d.
$Cd_{1-x}Zn_{x}S$ 박막의 성장과 광전도 특성
이상열,홍광준,유상하,신용진,이관교,서상석,김혜숙,윤은희,김승욱,박향숙,신영진,정태수,신현길,김태성,문종대,이충일,전승룡,Lee, S.Y.,Hong, K.J.,You, S.H.,Shin, Y.J.,Lee, K.K.,Suh, S.S.,Kim, H.S.,Yun, E.H.,Kim, S.U.,Park, H.S.,Shin, Y.J.,Jeong, T.S.,Shin, 한국센서학회 1995 센서학회지 Vol.4 No.3
Chemical bath deposition(C.B.D.)방법으로 다결정 $Cd_{1-x}Zn_{x}S$ 박막을 스라이드 유리(coming-2948) 기판위에 성장시켜 열처리하고 X-선 회절무늬를 측정하여 결정구조를 밝혔다. $550^{\circ}C$로 $N_{2}$ 속에서 열처리한 시료의 X-선 회절무늬로부터 외삽법으로 구한 격자상수는 CdS인 경우 $a_{0}\;=\;4.1364{\AA}$, $c_{0}\;=\;6.7129{\AA}$였으며 ZnS인 경우는 $a_{0}\;=\;3.8062{\AA}$, $c_{0}\;=\;6.2681{\AA}$였다. Van der Pauw 방법으로 Hall 효과를 측정하여 운반자 농도와 이동도의 온도 의존성을 연구하였다. 광전도 셀의 특성으로 스펙트럼응답 감도, 최대허용소비전력 및 응답시간을 측정하였다. Polycrystalline $Cd_{1-x}Zn_{x}S$ thin film were grown on slide glass(corning-2948) substrate using a chemical bath deposition (C.B.D) method. They were annealed at various temperature and X -ray diffraction patterns were measured by X-ray diffractometor in order to study $Cd_{1-x}Zn_{x}S$ polycrystal structure using extrapolation method of X-ray diffraction patterns for the CdS, ZnS sample annealed in $N_{2}$ gas at $550^{\circ}C$. It was found hexagonal structure which had the lattice constant $a_{0}\;=\;4.1364{\AA}$, $c_{0}\;=\;6.7129{\AA}$ in CdS and $a_{0}\;=\;3.8062{\AA}$, $c_{0}\;=\;6.2681{\AA}$ in ZnS, respectively. Hall effect on these sample was measured by Van der Pauw method and then studied on carrier density and mobility depending on temperature. We measured also spectral response, sensitivity maximum allowable power dissipation and response time on these sample.
에너지ㆍ환경 제반 시스템에 관한 수치해석적 연구(Ⅲ) : 싸이클론 전기집진기, 슬래깅 연소로, 연소로 냉간유동, 하이킹 오솔길, 폐수처리 반응조, JBR
장동순(D.S. Jang),박병수(B.S. Park),이은주(E.J. Lee),김복순(B.S. Kim),김영남(Y.N. Kim),김경미(K.M. Kim),김혜숙(H.S. Kim),신미수(M.S. Shin),도희준(H.J. Doh) 한국전산유체공학회 1996 한국전산유체공학회 학술대회논문집 Vol.1996 No.-
A seires of numerical calculations are performed on various energy and environmental systems, which include cyclonic electrostatic precipitator, slagging combustor, cold test furnace, the air movement in a hiking trail, wastewater reactor and jet bubbling reactor for SQx removal. A control-volume based finite-difference method by Patankar is employed together with the SIMPLEC algorithm. The standard two-equation and RNG k-ε turbulence models are implemented for Reynolds stress. Further, a simplified eddy breakup model is incorporated for two-phase coal combustion. Calculated results are presented briefly together with the summary of the important physics of each system.
송우영(W.Y. Song),김혜숙(H.S. Kim),신미수(M.S. Shin),장동순(D.S. Jang),이재구(Jae-Goo Lee) 한국전산유체공학회 2014 한국전산유체공학회지 Vol.19 No.3
Considering the importance of the detailed resolution of the reacting flow field inside a gasifier, the objective of this study lies on to investigate the effect of important variables to influence on the reacting flow and thereby to clarify the physical feature occurring inside the gasifier using a comprehensive gasifier computer program. Thus, in this study the gasification process of a 1.0 ton/day gasifier are numerically modeled using the Fluent code. And parametric investigation has been made in terms of swirl intensity and aspect ratio of the gasifier. Doing this, special attention is given on the detailed change of the reacting flow field inside a gasifier especially with the change of this kind of design and operation parameters. Based on this study, a number of useful conclusions can be drawn in the view of flow pattern inside gasifier together with the consequence of the gasification process caused by the change of the flow pattern. Especially, swirl effect gives rise to a feature of a central delayed recirculation zone, which is different from the typical strong central recirculation appeared near the inlet nozzle. The delayed feature of central recirculation appearance could be explained by the increased axial momentum due to the substantial amount of the presence of the coal slurry occupying over the entire gasifier in gasification process. Further, the changes of flow pattern are explained in detail with the gasifier aspect ratio. In general, the results obtained are physically acceptable in parametric study.
김혜숙(B),안승혜,이계용,이황현 이화여자대학교 의과대학 1977 梨花醫學誌 Vol.- No.9
The authors attempted to isolate Enterobacteria which might have been contaminated on some vegetables commonly consumed as raw by Korean natives during the period from Aug. 2 to Aug. 21, 1976. 39 cultures of Gram-negative rods were isolated from 30 specimens of chinese cabbages, 10 young radishes and 10 green onions collected from several markets and fields near Seoul. Of 39 cultures isolated, 34 cultures of Enterobacteria were identified, but 5 cultures of them were not able to be identified. Of 34 cultures identified, 3 cultures of Escherichia coli, 7 cultures of Citrobacter, 5 cultures of Enterobacter, 5 cultures of Proteus and 1 culture of Serratia were identified and 13 cultures were not able to be classified at Genus level. Salmonella and Shigella organisms were not detected from the specimens, but it was discussed that the possibility of their detection might be considered because Escherichia coli cultures, as an indicator of fecal contamination, were detected from some of those specimens.