• Nuclear Engineering and Technology
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• 제54권12호
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• pp.4798-4808
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• 2022

The porous corrosion deposits (known as CRUD) adhered to the cladding have an important effect on the heat transfer from fuel rods to coolant in PWRs. The vapor film is the main constituent in the two-phase film boiling model. This paper presents a vapor film thickness correlation, associated with CRUD porosity, CRUD chimney density, CRUD particle size, CRUD thickness and heat flux. The dependences of the vapor film thickness on the various influential factors can be intuitively reflected from this vapor film thickness correlation. The temperature, pressure, and boric acid concentration distributions in CRUD can be well predicted using the two-phase film boiling model coupled with the vapor film thickness correlation. It suggests that the vapor thickness correlation can estimate the vapor film thickness more conveniently than the previously reported vapor thickness calculation methods.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2021년도 춘계학술대회
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• pp.71-71
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• 2021

• Asian Journal of Innovation and Policy
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• 제6권2호
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• pp.111-137
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• 2017

This study analyzes a language network of Science and Technology Basic Plan, which is the basis for science and technology policy in Korea, for the next Science and Technology Basic Plan. Language network analysis was adopted for a quantitative approach measuring the trend of policies. Several techniques such as keyword analysis, language network map analysis, quantitative characteristics analysis and keyword-related major-word analysis have been performed. Results show that there are common policies emphasized by all Science and Technology Basic Plans in the past, and there are also specific policies emphasized in each period of the Science and Technology Basic Plan. These specific policies come from a 'change of times' when the Science and Technology Basic Plans were established, as well as the philosophy of the national government.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2005년도 추계학술발표회 요지
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• pp.224-225
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• 2005

• 한국고분자학회:학술대회논문집
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• 한국고분자학회 2006년도 IUPAC International Symposium on Advanced Polymers for Emerging Technologies
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• pp.221-221
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• 2006

The stereochemical control in polypropylenes and styrene-ethylene copolymers based on homogeneous single-site polymerization catalysts has received great attention since the stereocpecificity is one of the key factors in tailoring the polymer properties. Thus, we have developed new tactics for isospecificity in propylene polymerization with the unbridged metallocenebased systems and syndiospecific styrene-styrene sequence in styrene-ethylene copolymerization with the group 4 metallocene system. Brief details of the synthesis, structures and the polymerization behavior of a set of new metallocene catalysts will be presented.

• 한국생물공학회:학술대회논문집
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• 한국생물공학회 2003년도 생물공학의 동향(XIII)
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• pp.149-150
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• 2003

• 한국동물학회:학술대회논문집
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• 한국동물학회 2006년도 제61회 한국생물과학협회 정기학술대회
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• pp.21-21
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• 2006

• 한국동물학회:학술대회논문집
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• 한국동물학회 2001년도 공동 춘계학술대회
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• pp.74-74
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• 2001

No Abstract, See Full Text

• 한국과학교육학회지
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• 제21권3호
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• pp.537-546
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• 2001

본 연구에서는 3개 교육대학의 과학교육과 1학년 학생 93명과 4학년 학생 82명을 대상으로 과학 기술과 사회의 관계에 대한 견해를 조사하였다. 검사 도구는 과학 기술이 사회에 미치는 영향과 사회가 과학 기술에 미치는 영향의 두 범주로 구성되어 있으며, Views On Science-Technology-Society에서 각 범주 당 4문항씩 선정하여 사용하였다. Mann-Whitney U 검증 결과, 1학년이 4학년보다 점수가 높았으며, 이러한 경향은 '기업이 과학 기술에 미치는 영향'과 '이익 집단이 과학 기술에 미치는 영향' 문항에서 두드러졌다. 또한, 1학년에서는 '정치가 과학 기술에 미치는 영향' 문항에서 성에 따른 이해수준의 차이가 나타났지만, 4학년에서는 성에 따라 유의미한 차이가 없었다.

• 한국자기학회:학술대회 개요집
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• 한국자기학회 2004년도 동계학술연구발표회 논문개요집
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• pp.4-4
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• 2004