• Title/Summary/Keyword: 결정학

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Growth of KDP Single Crystals in Aqueous Solution (수용액중에서 KDP단결정의 육성)

  • 김판채;최경란
    • Journal of the Korean Crystal Growth and Crystal Technology
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    • v.2 no.1
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    • pp.37-42
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    • 1992
  • KDP단결정의 육성을 서냉법 및 정온법에 의해 행하였다. KDP용해도의 온도계수는 20-80℃의 측정온도 범위에서 positive였다. KDP종자결정은 수용액중의 육성온도가 30℃일 때 큰 결정으로 성장하였다. KDP단결정의 tapering효과는 산도, 과포화 및 육성온도에 의존하였다. KDP-ADP결정은 수용액중 33℃의 육성온도에서 얻을 수 있었다.

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Review on the papers presented in the JKACG(1991-1995) : (II) On the thin film crystal growth (JKACG의 제1권(1991)부터 제5권(1995)까지 발표된 논문의 검토 : (II) 박막 결정성장 연구를 중심으로)

  • 오근호;심광보;임창성
    • Journal of the Korean Crystal Growth and Crystal Technology
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    • v.6 no.2
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    • pp.286-292
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    • 1996
  • The research activities on the thin film crystal growth presented in the Journal of the Korean Association of Crystal Growth form 1991 to 1995 have been reviewed.

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The Effect of Sunk Cost and Anchoring Effect on Shipping Finance (매몰 비용과 엥카링 효과가 선박금융에 미치는 영향)

  • Kim, Wu-Seok;Lee, Ki-Hwan
    • Journal of Navigation and Port Research
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    • v.44 no.4
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    • pp.326-337
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    • 2020
  • Shipping companies have suffered additional losses because of irrational shipping finance decisions. This paper analyses the cases according to the behavioral finance theories. The theories of behavioral finance used in the analysis and research of this paper are the anchoring effect and sunk cost effect. The backgrounds and reasons for the decisions regarding ship financing are analysed based on the questionnaire responses and case studies. As a result of the analysis, it is found that the behavioral finance theories, anchoring effect, and sunk cost effect, have effects on the ship financing decisions, that errors related to behavioral finance can result in irrational decisions, and that shipping companies suffered additional losses because of the behavioral finance errors.

Dependence of defects on growth rate in (100) ZnSe cryseal ((100) ZnSe 결정에서 결함의 성장 속도에 대한 의존성)

  • 박성수;이성국;김준홍;한재용;이상학
    • Journal of the Korean Crystal Growth and Crystal Technology
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    • v.8 no.2
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    • pp.263-268
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    • 1998
  • (100) ZnSe crystals with twin and grain free were grown by vapor transport method. The defect in (100) ZnSe crystals was investigated by FWHM of X-ray Rocking Curve. The growth rate and seed quality are the main parameters of the growth process to obtain the high quality ZnSe crystals. The geometric shape of the grown (100) ZnSe crystal is dependent on the shape of seed, isothermal line in furnace and the growth rate of each surface in crystal.

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Growth and defects of ZnSe crystal (ZnSe 단결정 성장과 결정결함)

  • 이성국;박성수;김준홍;한재용;이상학
    • Journal of the Korean Crystal Growth and Crystal Technology
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    • v.7 no.1
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    • pp.76-80
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    • 1997
  • ZnSe single crystals were grown by seeded chemical vapor transport in $H_2$ atmosphere. The influence of the growth parameters on the crystal defect was investigated. The grown ZnSe single crystal was characterized by chemical etching, X-ray rocking curve and photoluminescenc e measurements.

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Synthesis and Structure of trans-Bis[bis(diphenylphosphino)ethane]cyanohydridoiron(II), trans[FeH(CN)$(dppe)_2$](dppe=$Ph_2PCH_2CH_2PPh_2)$ ([FeH(CN)$(dppe)_2$ 착물의 합성 및 구조)

  • 이재경;최남선;이순원
    • Korean Journal of Crystallography
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    • v.10 no.1
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    • pp.45-50
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    • 1999
  • Ar 기류하에서 trans-[FeH(NCCH2CH2CH2Cl)(dppe)2][BF4], 1과 KCN이 반응하여 trans-[FeH(CN)(dppe)2], 2가 생성되었다. 이 화합물의 구조가 NMR, IR, 원소분석, 그리고 X-ray 회절법으로 규명되었다. 착물 2의 결정학 자료: 단사정계 공간군 p21/c, a=13.580(1) b=20.178(2) , c=17.592(3) , β=92.22(1)o, Z=4,(wR2)=0.0659(0.1692).

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매출액 7% 연구비 투자, '좋은 약'으로 승부

  • Lee, Gang-Bong
    • The Science & Technology
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    • no.4 s.443
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    • pp.84-87
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    • 2006
  • 'CTO에게 듣는다' 네번째 주인공은 장종환 녹십자 부사장이다. 장종환 부사장은 서울대 화학과 졸업 후 미국 피츠버그대학교에서 구조결정학으로 박사학위를 받았다. 그후 아르곤국립연구소 연구원, 일리노이 대학교 약학대학 겸임교수, 듀폰제약 단백질 구조결정학 연구그룹 책임자, BMS 단백질 구조결정학 및 분자설계 연구그룹 책임자, BMS 리서치 펠로로 활동하다 지난 2005년부터 녹십자 CTO를 맡고 있다.

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Analysis on Discussion about 'Condition of Triangle-Determining' (삼각형의 결정조건'에 대한 논의의 분석)

  • Yong Park, Sun;il Kwon, Seok
    • Journal of Educational Research in Mathematics
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    • v.14 no.4
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    • pp.435-447
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    • 2004
  • There are divergent opinions about condition of triangle-determining. The purpose of this study was to compare those opinions and to identify cause of this phenomena. As a result of our study, we got to find out significant characteristics of proposition related to condition of triangle-determining. These aspects shows what cause of that phenomena is. First, that proposition is used as a theortical tool, not as a practical one. Second, that proposition presupposes that a triangle exists. Third, that proposition is connected with minimality and generality. However, our analysis is for teacher, not for student. Thus, we suggest a guiding principle as well as a guiding method in relation to teaching of that proposition.

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