G.I.S.H. 수술과 복식 전자궁적출술의 비교

지일운,허준용,서호석,박용균,조수용,주갑순,이규완,구병삼 대한산부인과내시경학회 1995 대한산부인과내시경학회잡지 Vol.7 No.1

Comparison of 90‐day case‐fatality after ischemic stroke between two different stroke outcome registries using propensity score matching analysis

Yu, K‐,H.,Hong, K‐,S.,Lee, B‐,C.,Oh, M‐,S.,Cho, Y‐,J.,Koo, J‐,S.,Park, J‐,M.,Bae, H‐,J.,Han, M‐,K.,Ju, Y‐,S.,Kang, D‐,W.,Appelros, P. Blackwell Publishing Ltd 2011 Acta neurologica Scandinavica Vol.123 No.5

<P>Yu K‐H, Hong K‐S, Lee B‐C, Oh M‐S, Cho Y‐J, Koo J‐S, Park J‐M, Bae H‐J, Han M‐K, Ju Y‐S, Kang D‐W, Appelros P, Norrving B, Terent A. Comparison of 90‐day case‐fatality after ischemic stroke between two different stroke outcome registries using propensity score matching analysis. 
Acta Neurol Scand: 2011: 123: 325–331. 
© 2010 John Wiley & Sons A/S.</P><P><B>Background – </B> It has not been clarified whether the disparity in ischemic stroke outcome between populations is caused by ethnic and geographic differences or by variations in case mix. Propensity score matching (PSM) analysis can overcome some analytical problems but is rarely used in stroke outcome research. This study was to compare the ischemic stroke case‐fatality between two PSM cohorts of Sweden and Korea.</P><P><B>Methods – </B> Prognostic variables related to baseline characteristics and stroke care were included in our PSM model. Then, we selected 7675 Swedish and 1220 Korean patients with ischemic stroke from each stroke registers and performed one‐to‐one matching based on propensity scores of each patient.</P><P><B>Results – </B> After PSM, all measured variables were well balanced in 1163 matched subjects, and the 90‐day case‐fatality was identical 6.2% (HR 0.997, 95%CI 0.905–1.099) in Sweden and Korea.</P><P><B>Conclusions – </B> No difference is found in the 90‐day case‐fatality in propensity score‐matched Swedish and Korean patients with ischemic stroke.</P>

Investigation for Epi-Ready Treatment Process of InP Substrates

J. S. Song,Y. C. Choi,M. C. Ju,S. H. Seo,M. H. Oh,D. C. Oh,T. Yao,H. Y. Lee 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.54 No.2

We investigate the wet chemical cleaning process for ready-to-use InP substrates. To prepare epi-ready InP wafers, we used a H2SO4 mixture for wet-chemical cleaning to remove both particles and metallic contaminants. A particle-free, metal-free and thin native oxide surface was achieved by optimizing the H2SO4 mixture proposed in this experiment. Metal contamination was analyzed by using total reflection X-ray fluorescence spectroscopy and characterization of the oxide composition was carried out by using X-ray photoelectron spectroscopy. The surface morphology and the thickness of oxide layer were observed by using atomic force microscopy and ellipsometry, which showed a very flat surface roughness of 0.37 nm and a uniform oxide thickness of 1.8 nm, respectively. We investigate the wet chemical cleaning process for ready-to-use InP substrates. To prepare epi-ready InP wafers, we used a H2SO4 mixture for wet-chemical cleaning to remove both particles and metallic contaminants. A particle-free, metal-free and thin native oxide surface was achieved by optimizing the H2SO4 mixture proposed in this experiment. Metal contamination was analyzed by using total reflection X-ray fluorescence spectroscopy and characterization of the oxide composition was carried out by using X-ray photoelectron spectroscopy. The surface morphology and the thickness of oxide layer were observed by using atomic force microscopy and ellipsometry, which showed a very flat surface roughness of 0.37 nm and a uniform oxide thickness of 1.8 nm, respectively.

Diamond-전자 방출원의 제작과 특성 평가

주병권,김성진,정재훈,박범수,백영준,임성규,오명환 경북대학교 센서기술연구소 1995 센서技術學術大會論文集 Vol.6 No.1

Strip-shaped diamond field emitter arrays were fabricated by using a transfer mold technique. V-grooves were formed on a single crystalline (100) silicon substrate by an orientation dependent etching(ODE) method. Diamond film was grown on V-grooved silicon substrate by chemical vapor deposition(CVD). Diamond field emitter arrays were formed by etching silicon substrates. I-V characteristics of the fabricated diamond field emitter arrays under 2 x10^(-6) Torr showed very sharp turn-on characteristics. Empirical result which was obtained in this work is feasibility of transfer mold technique for fabrication of diamond field emitter arrays. It may be possible to use the strip-shaped diamond field emitter arrays for the field emission display (FED) applications.

진공-정전 열 접합을 이용한 FED의 Tubeless Packaging

주병권,이덕중,정지원,안준호,김훈,오명환 경북대학교 센서기술연구소 1998 센서技術學術大會論文集 Vol.9 No.1

Sotalime-to-sodalime glass electrostatic bonding was performed by using Si interlayer and its applicability was evaluated by panel capping of FED in vacuum environment. The bonding properties of the bonded sodalime-to-sodalime structure were investigated and Mo-tip FED was successfully vacuum-packaged by the developed bonding technology.

The atrzf1 mutation of the novel RING-type E3 ubiquitin ligase increases proline contents and enhances drought tolerance in Arabidopsis

Ju, H.W.,Min, J.H.,Chung, M.S.,Kim, C.S. Elsevier Scientific Publishers Ireland Ltd 2013 Plant science Vol.203 No.-

The covalent attachment of ubiquitin to proteins plays a fundamental role in the regulation of cellular function through biological events involving abiotic or biotic stress responses, immune responses, and apoptosis. Here, we characterize the biological function of the Arabidopsis thaliana RING Zinc Finger 1 (AtRZF1) in dehydration response. AtRZF1 was significantly reduced by drought stress. The atrzf1 mutant was less sensitive to osmotic stress than the wild-type during early seedling development, whereas transgenic plants overexpressing AtRZF1 were hypersensitive, indicating that AtRZF1 negatively regulates drought-mediated control of early seedling development. Moreover, the ectopic expression of the AtRZF1 gene was very significantly influential in drought sensitive parameters including proline content, water loss, membrane ion leakage and the expression of dehydration stress-related genes. AtRZF1 is a functional E3 ubiquitin ligase, and its conserved C3H2C3-type RING domain is likely important for the biological function of AtRZF1 in drought response. Together, these results suggest that the E3 ligase AtRZF1 is an important regulator of water deficit stress during early seedling development.

TiO2, Al2O3 and SiO2 as radiocatalyst ceramics.

J. C. González-Juárez,H. Carrasco-Ábrego,J. Jiménez-Becerril 한양대학교 세라믹연구소 2009 Journal of Ceramic Processing Research Vol.10 No.4

A simple experiment of gamma irradiated radiolytic versus radiocatalytic 4-chlorophenol degradation is presented. Samples of 4-chlorophenol solutions were put in contact with TiO2, Al2O3 and SiO2 ceramics and gamma irradiated. It was found that addition of these materials improve the degradation in a way similar to photocatalysis. A simple experiment of gamma irradiated radiolytic versus radiocatalytic 4-chlorophenol degradation is presented. Samples of 4-chlorophenol solutions were put in contact with TiO2, Al2O3 and SiO2 ceramics and gamma irradiated. It was found that addition of these materials improve the degradation in a way similar to photocatalysis.

The inability of Bacillus licheniformis perR mutant to grow is mainly due to the lack of PerR-mediated fur repression

Kim, J. H.,Yang, Y. M.,Ji, C. J.,Ryu, S. H.,Won, Y. B.,Ju, S. Y.,Kwon, Y.,Lee, Y. E.,Youn, H.,Lee, J. W. MICROBIOLOGICAL SOCIETY OF KOREA 2017 JOURNAL OF MICROBIOLOGY -SEOUL- Vol. No.

<P>PerR, a member of Fur family protein, is a metal-dependent H2O2 sensing transcription factor that regulates genes involved in peroxide stress response. Industrially important bacterium Bacillus licheniformis contains three PerR-like proteins (PerR(BL), PerR2, and PerR3) compared to its close relative Bacillus subtilis. Interestingly, unlike other bacteria including B. subtilis, no authentic perR (BL) null mutant could be established for B. licheniformis. Thus, we constructed a conditional perR (BL) mutant using a xylose-inducible promoter, and investigated the genes under the control of PerR(BL). PerR(BL) regulon genes include katA, mrgA, ahpC, pfeT, hemA, fur, and perR as observed for PerR(BS). However, there is some variation in the expression levels of fur and hemA genes between B. subtilis and B. licheniformis in the derepressed state. Furthermore, katA, mrgA, and ahpC are strongly induced, whereas the others are only weakly or not induced by H2O2 treatment. In contrast to the B. subtilis perR null mutant which frequently gives rise to large colony phenotype mainly due to the loss of katA, the suppressors of B. licheniformis perR mutant, which can form colonies on LB agar, were all catalase-positive. Instead, many of the suppressors showed increased levels of siderophore production, suggesting that the suppressor mutation is linked to the fur gene. Consistent with this, perR fur double mutant could grow on LB agar without Fe supplementation, whereas perR katA double mutant could only grow on LB agar with Fe supplementation. Taken together, our data suggest that in B. licheniformis, despite the similarity in PerR(BL) and PerR(BS) regulon genes, perR is an essential gene required for growth and that the inability of perR null mutant to grow is mainly due to elevated expression of Fur.</P>

간호대학생의 이론・실습 성적과 임상수행능력의 관련성 : 성인간호학 교과목을 중심으로

권현진,김다영,김민정,김소현,박예담,박지원,왕서현,유영주,이재현,주가은,신수진 이화여자대학교간호학회 2020 이화간호학회지 Vol.- No.54

Purpose: This study aimed to explore the relationship among score of theory course, score of practicum course and clinical practice ability by the course, Adult Health Nursing. Methods: A descriptive research was conducted using questionaries. Data were collected from September 25 to October 2, 2019. Participants were 67 nursing students at one university in Seoul on their junior year who have experienced clinical settings. The collected data were analyzed by t-test, ANOVA, Cohen’s Kappa, and Scheffe’s test using SPSS 25.0 version program. Results: Participants were given a quartile number from 1 to 4 respectively according to their scores of theory course those of practicum course. The total mean score of clinical practice ability was 3.61, with a perfect score of 5. The scores of theory course and practicum course showed slight correlation(Cohen’s Kappa=.168). However, significant correlation did not existed among score of theory course, score of practicum course and clinical practice ability. Conclusion: The result showed that score of theory course, score of practicum course and clinical practice ability have no significant correlation. However, its finding suggests the necessity of further research about various approach and new evaluation methods needed in order to improve nursing students’ competency.

한국 최초의 경주시 황남동 출토 유리 용융 도가니 및 유리 구슬에 대한 연구

최주,안재호,황상주,권희경,김수철,도정만,박기훈,김선태 한국전통과학기술학회 1994 한국전통과학기술학회지 Vol.1 No.1

A piece of glass melting crucible whose inner face was lined with yellowish brown glass, a yellowish brown ellipsoidal bead and a greenish scrcew-shaped wound bead were unearthed in Kyongju city. These finds were dated to around the middle of the 6th century by pattern impressed earthenwares excavated in the same stratum. Chcmica analyses were carried out by means of energy diapersive spectrometry(EDS), atomic absorption analysis(AA), induced coupling plasma analysis(ICP) along with conventional wet analvsis. Also X-ray and elecrtron diffraction analvses were periomd in an attempt to identify any crystalline precipitates. Three glass items are classified iota lead-silica group showing the same compositions. This indicates that the two beads are from the same crucible. Ywllowish brown glass film contains 72.5% PbO and 25.2% SiO₂ and its softening point is 442℃ which is determined by differential scanning calorimeter(DSC). Melting point is found to be around 650℃ by practical measurement. Color differences in two beads are proved to be mainly due to copper contained in the glass, i.e., yellowish brown and greenish colors depend on reduction and oxidation atmosphere during melting, respectively. Chemical analysis shows that the glass melting crucible is a common earthenware.