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Effects of oxide coating on the growth of single grain YBCO bulk superconductors
Park, S.D.,Jun, B.H.,Park, B.J.,Jung, S.Y.,Seong, B.S.,Kim, C.J. North-Holland 2009 Physica. C, Superconductivity Vol.469 No.15
Surface oxide coating and bottom inserting of oxide plates have been conducted to top seeded melt growth (TSMG) processed YBa<SUB>2</SUB>Cu<SUB>3</SUB>O<SUB>7-y</SUB> (Y123) bulk superconductors with an aim of controlling the Y123 nucleation and growth. The coating medium for surfaces was Yb<SUB>2</SUB>O<SUB>3</SUB> solution and the bottom inserts were Yb<SUB>2</SUB>O<SUB>3</SUB>/Y<SUB>2</SUB>O<SUB>3</SUB> powder compact. Many vertical cracks were found to develop at the compact/insert interfaces when an Yb<SUB>2</SUB>O<SUB>3</SUB> insert was used, but the crack evolution was greatly reduced when a (Yb<SUB>2</SUB>O<SUB>3</SUB>+Y<SUB>2</SUB>O<SUB>3</SUB>) insert was used. The formation of the vertical cracks is ascribed to the difference in thermal expansion between the YBCO compact and bottom insert. Presence of vertical cracks was found to be crucial to the trapped magnetic field and levitation forces of single grain YBCO bulk superconductors. The Y123 nucleation and growth in TSMG-processed YBCO bulk superconductors were successfully controlled by conducting surface coating and bottom plating using a (Yb<SUB>2</SUB>O<SUB>3</SUB>+Y<SUB>2</SUB>O<SUB>3</SUB>) insert and as a result, the levitation properties were much enhanced.
Tunable threshold voltage in solution-processed single-walled carbon nanotube thin-film transistors
Seong, N.,Kim, T.,Kim, H.,Ha, T.J.,Hong, Y. Elsevier 2015 CURRENT APPLIED PHYSICS Vol.15 No.suppl1
We have investigated tunable threshold voltage in solution-processed single-walled carbon nanotube thin-film transistors (SWCNT TFTs) employing a simple and reproducible method of chemical encapsulation. Compared to a pristine one, SWCNT TFTs encapsulated with ammonium hydroxide (NH<SUB>4</SUB>OH) and nitric acid (HNO<SUB>3</SUB>) exhibit a negative shift and a positive shift in threshold voltage, respectively. Such results can be explained by the modification of the energy band at the interface between the source metal electrode and the SWCNT network. By using the Y-function method, we also characterized electrical properties such as field-effect mobility, threshold voltage, and contact resistance for TFTs treated with NH<SUB>4</SUB>OH or HNO<SUB>3</SUB>. The technique to favorably tune threshold voltage in solution-processed SWCNTs is significant for constituting CNT-based nanoelectronics.
한우에 있어서 Rosette Inhibition Test 에 의한 조기 임신인자(Early Pregnancy Factor)의 검출
성환후,백광수,고응규,신기준,박용윤,신원집 한국축산학회 1997 한국축산학회지 Vol.39 No.4
Early pregnancy factor(EPF) is one of the pregnancy associated proteins, and it is detected in senun of many pregnant animals shortly after fertilization. The present study was conducted to establish a system of early pregnancy by EPF detection in Hanwoo cows. The EPF activity was measured by the rosette inhibition test on day 15 after artificial insemination or non-insemination. The rate of rosette formation between Hanwoo lymphocytes and sheep red blood cells was significantly(P$lt;0.05) higher compared to that between Hanwoo lymphocytes and goat, or rabbit red blood cells. The rosette formation between lymphocytes suspension and sheep red blood cells with anti-lymphocytes was not significantly(P$lt;0.05) changed until 5∼20 min. of culture, and then decreased dramatically by 30 min. There were significant(P$lt;0.05) differences in the rosette inhibition titer(RIT) between pregnant and non-pregnant Hanwoos on day 15 after artificial insemination. The results indicate that the expression of early pregnancy factor by the rosette inhibition test might be used to diagnosis of early pregnancy in Hanwoo.
혈청 단백 분획치의 참고치 조사(서울 의과학 연구소 서울 임상검사 센타)
유영식 ( Y S Yu ),이병욱 ( B O Lee ),송남석 ( N S Song ),성상철 ( S C Seong ),이경옥 ( K O Lee ),서덕규 ( D K Seo ),이규범 ( K B Lee ) 대한임상검사과학회 1991 대한임상검사과학회지(KJCLS) Vol.23 No.1
A study was performed to compare an agarose gel electrophoresis for the protein fraction with the other reported reference values. It was carried out to determine the reference values of adults in Seoul area, from Oct. 1st 1991 through Oct. 20th 1991. 143 male and 87 female venous blood sampl- es were collected from SCL personnel and collected analized by the agarose gel electrophoresis at the Seoul Clinical Laboratory of Seoul Medical Science Institute. The results are shown on Table 2 and 3. Our results show that albumin was 2. 4% lower and .,-globulin was 4. 5% higher compared with the Corning report in the U.S. A., whereas our results were virtually equal to previously reported results of rural population in Korea. The increase- d y-globulin albeit small, may indicate more prevalent chronic infection among Korea populati on.
이성용,강영택,이정현 국립특수교육원 2012 특수교육연구 Vol.19 No.1
상황이야기 중재는 자폐증 및 발달장애학생의 사회적 기술과 지식을 증가하기 위하여 활용되는 효과적인 교수전략이다. 본 연구는 상황이야기를 중재로 활용한 국내 실험연구들을 메타분석 함으로써, 상황이야기 중재의 효과성을 검증하고 앞으로 효과적인 사회성 기술 교육 프로그램을 개발 및 적용하는 데 필요한 기초 자료를 제시하고자 하였다. 이를 위해 지금까지 국내에서 발표된 상황이야기 중재와 관련된 논문을 조사하고, 분석 논문 선정 기준에 따라 국내 13편의 실험 논문을 최종 분석 대상으로 선정하였다. 본 연구의 메타분석은 3가지 분석 영역에 따라 총 7개의 분석변인(연구대상, 실험환경, 실험설계, 중재유형, 목표기술, 중재효과, 유지 및 일반화 효과)으로 분석하였다. 우선 메타분석의 결과를 살펴보면 상황이야기 중재효과는 전체적으로 중간 크기의 효과를 보였으며, 유지와 일반화는 큰 효과가 있었다. 본 연구의 분석결과는 7개의 분석변인에 따라 구체적으로 제시하였으며, 그 결과는 상황이야기 중재와 효과적인 교수기법을 의미하는 근거기반 실제의 관점에서 논의하였다. The social story is effective intervention strategies for addressing social communication skills, social interaction skills, and behavioral functioning in children with ASD and developmental disabilities. The purpose of this study was to meta-analysis the research literature of social story interventions of children with ASD and developmental disabilities and to provide information and suggestions on social story interventions for future research and practices at schools. A systematic search of the literature from 1993 to 2011 revealed 13 experimental studies published in special education within South Korea. This study analyzed the 13 selected studies in terms of 7 analytical variables: participants, research settings, experimental design, target skills, type of intervention, effects of intervention, maintenance and generation. In particular, results indicated a moderately positive effect for social intervention (mean ES ≤ .80, median PND = 85%). Maintenance (median PND = 100%) and generalization effects (median PND = 100%) revealed large effects. The findings of this study were described in detail based on the 7 analytic variables. The implications of the findings and recommendations for practice and future research on social story interventions were presented.