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일관장 개념의 평면변형률 요소에의 확장 (Extension of Field-Consistency to Plane Strain Elements)

  • 김용우
    • 대한기계학회논문집
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    • 제19권8호
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    • pp.1799-1809
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    • 1995
  • The applicability of the field-consistency paradigm, which was originally employed for analysis of locking due to constrained energy having the second power of a strain, is extended to the constrained energy having a quadratic form of strain. For the extension, nearly-incompressible plane strain problem is considered by introducing the concept of reduced minimization. The field-consistent analysis of the plane strain problem leads to a clear and systematic understanding on the relation amongst constraints imposed on element, spurious constraint -free optimal points, and integration order used.

압축형 제거 앵커의 개발 및 성능 평가 (Development of Removable-Strand Compression Anchor)

  • 김낙경;김성규
    • 한국지반공학회:학술대회논문집
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    • 한국지반공학회 2001년도 봄 학술발표회 논문집
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    • pp.339-346
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    • 2001
  • For temporary excavation support in private land area, the strand of ground anchor should be removed In order to get permission to install anchors. The extractable or removable-strand compression anchor system was developed and evaluated by a series of pull-out load tests. Anchor pull-out tests were performed on seven instrumented full-scale low-pressure grouted anchors installed in weathered soil at the Geotechnical Experimentation Site at Sungkyunkwan University, Four anchors are the compression type anchors and three are the tension anchors. Performance test, creep test, and long term relaxation test were performed and presented. Load distributor was developed in order to distribute large compressive stresses in grout.

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Prenatally Diagnosed Rare Trisomy 16 Mosaicism in Human Amniotic Fluid Cells in the Second Trimester: A Case Report

  • Kim, Sook Ryung;Choi, Eun Jung;Kim, Young Joo;Kim, Tae Yoon;Lee, Young Jin
    • 한국발생생물학회지:발생과생식
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    • 제22권2호
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    • pp.199-203
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    • 2018
  • Although trisomy 16 is commonly detected in spontaneous abortions and accounts for over 30% of cases of autosomal trisomy detected after spontaneous abortion, trisomy 16 mosaicism is rarely detected by amniocentesis in the second trimester. Here, we report a case of level III trisomy 16 mosaicism (47,XX,+16[8]/46,XX[31]) diagnosed by cytogenetic analysis of independently cultured amniotic fluid cells. The female baby was delivered at full term with low birth weight and intrauterine growth retardation, and interestingly, her karyotype was normal (46,XX). Given the difficulty in predicting the outcomes of fetuses with this mosaicism, it is recommended to inform the possibility of mosaicisms including this trisomy 16 mosaicism during prenatal genetic diagnosis and genetic counseling for parents.

신생아에서의 부신기능 평가와 질환 (Evaluation of function and disorders of the adrenal gland in neonates)

  • 황일태
    • Clinical and Experimental Pediatrics
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    • 제50권3호
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    • pp.236-240
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    • 2007
  • Majority of sick full term newborns have adequate adrenal cortical function in response to stress. Acutely ill neonates with a basal cortisol level less than $15{\mu}g/dL$ (414 nmol/L) suggest adrenal insufficiency and require function testing of adrenal function. In premature infant, immaturity of hypothalamic-pituitary adrenal axis (HPA axis), may limit the ability to increase cortisol production in response to stress. The response to low dose ACTH and CRH appears to be useful as an additional test of adrenal function. CRH stimulation has been used increasingly in neonates. The ACTH and CRH stimulated cortisol response of more than $17{\mu}g/dL$ (469 nmol/L) indicates a normal response.

초극소 저출생 체중아에서 발생한 Listeria Monocytogenes에 의한 조발형 패혈증 1례 (Early-Onset Sepsis Due to Listeria Monocytogenes in a Extremely Low Birth Weight Infant)

  • 문진화;오성희;문수지
    • Pediatric Infection and Vaccine
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    • 제7권2호
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    • pp.245-249
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    • 2000
  • 저자들은 재태기간 26주에 조기 진통으로 분만 후 사망한 초극소 저출생 체중아에서 L. monocytogenes에 의한 패혈증과 이에 의한 사망을 관찰하였기에 이를 문헌 고찰과 함께 보고하는 바이다.

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한국과 미국의 공학교육 연구주제의 동향 분석(I):한.미 공학교육학회지 투고논문을 중심으로 (Research Trends on Engineering Education in Korea and United States(I): Based on the Articles in JEER of Korea and JEE of U.S.)

  • 정준오;최선미
    • 공학교육연구
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    • 제16권2호
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    • pp.37-49
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    • 2013
  • In this paper, articles in full body of JEER in Korea and JEE in U.S. were classified into two categories- Research area and Key words-to endeavor a comparative study of the engineering education research(EER) topics and their temporal changes. In the recent 4 year term, 'Accreditation of Engineering Education' and 'Courses & Curriculum' were the most common key words appearing in JEER and 'Researches on EER' and 'Learner's Factor' in JEE. If we put curriculum/teaching materials/teaching as the input elements and learning/assessment as the output elements for education achievement, JEE demonstrates that many of the research topics have shifted from input to output in the recent years, while JEER research is in the transient stage.

국민학교 가정과 교과교육을 위한 기초연구 (A Basic Study on the Subject Education of Home Economics in the Elementary School)

  • 전정희;김용미
    • 한국가정과교육학회지
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    • 제1권1호
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    • pp.87-99
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    • 1989
  • This paper is aimed to improve the current curriculum in the Korean elementary school’s practical course, which covers both industrial fields and Home Economics. Specially inveotigated here are teacher’s attitude toward the practical course and the degree of difficulty in teaching each content of the practical course in the 4th and 5th grade in the elementary school in term’s of teacher’s sex and localing. Since two heterogeneous subjects, industrial fie인 and Home Economics, are integrated into one subject named the practical course, the teaching of the practical course is not specialized. Besides, the teaching is implemented inefficiently, owing to the teacher’s misunderstanding of the practical course. In this respect, as a way of maximizing the effectiveness of practical course in elementary school, the authors suggest some proposals. (1) The curriculum of practical course should be divided into two course, industrial fields and Home Economics (2) All students should be completed Home Economics as a required course (3) A system of full-time teacher for Home Economics subject should be introduced. Concurrently, the curriculum of the practical course in Teacher’s College be modified.

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재미 국제 장기 분거가족 전업주부의 일상적 삶과 정체성 유지에 관한 연구 : '기러기엄마' 되기 과정 (A Qualitative Study on the Life Experience and Identity Maintenance of the Full-Time Housewives of the Korean Wild Geese Family in U.S.A)

  • 김선미
    • 가족자원경영과 정책
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    • 제11권4호
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    • pp.171-189
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    • 2007
  • The purpose of this ethnography is to describe and analyze the process of becoming a wild geese mother. Thirteen mothers from New York, California, and Texas of U.S.A. were interviewed with an unstructured questionnaire. There are several different patterns of the process; 'the short term', 're-departure after returning to Korea', 'a step to initiate their family's immigration', 'sudden and unintentional'. In the first stage of the family living rearrangement, the main issues are about the wider free world, proper time for leaving and proper period for staying, where to live and my husband's independent living. The wild geese mothers perform the concrete tasks about the everyday living for the new mother-child family in the foreign country. They report their subjective interpretation for their new life.

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풀스팬 프리캐스트 세그먼트 교량의 해석 및 장기거동 해석 (Long Term Behavior and Analysis of Full Span Precast Segmental Bridge)

  • 오병환;채성태;정상화;박지언
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 1999년도 춘계학술대회 논문집
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    • pp.434-441
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    • 1999
  • The newly proposed Precast Segmental Mettled (PSM), which makes use of precast elements for election, is relatively new, efficient and fast mettled for the construction of prestressed box girder bridges. A precast segment of 25m long pretensioned in the fabrication yard is transported by a special trailer and a launching truss to its final position. The segments are then connected in the site by post-tensioning to make a continuous prestressed concrete box girder bridges. The purpose of this parer is to analyze and evaluate the design of precast prestressed concrete box girder bridges. The detailed analyses including time-dependent behavior of PSM bridges are conducted. The major results and findings, which have been obtained from finite element analysis of PSM bridge, are discussed in this paper and these results will be a good base for the design and analysis of a new precast bridges.

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REVIEW AND FUTURE ISSUES ON SPENT NUCLEAR FUEL STORAGE

  • Saegusa, T.;Shirai, K.;Arai, T.;Tani, J.;Takeda, H.;Wataru, M.;Sasahara, A.;Winston, P.L.
    • Nuclear Engineering and Technology
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    • 제42권3호
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    • pp.237-248
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    • 2010
  • The safety of metal cask and concrete cask storage technology has been verified by CRIEPI through several research programs on demonstrative testing for the interim storage of spent fuel. The results have been reflected in the safety requirements for dry casks issued by NISA/METI (Nuclear and Industrial Safety Agency, Ministry of Economy, Trade and Industry) of the Japanese government. On top of that, spent fuel integrity has been studied by the Japan Nuclear Energy Safety Organization (JNES). This paper reviews these research programs. Future issues include the long-term integrity of cask components and high burn-up spent fuel.