• 한국재료학회:학술대회논문집
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• 한국재료학회 1995년도 추계 학술발표 강연 및 논문개요집
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• pp.9-9
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• 1995

• 한국기계연구소 소보
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• 통권11호
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• pp.69-76
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• 1984

• 한국원자력학회:학술대회논문집
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• 한국원자력학회 1999년도 추계학술발표회요약집
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• pp.321.2-321
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• 1999

• 한국방사성폐기물학회:학술대회논문집
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• 한국방사성폐기물학회 2017년도 추계학술논문요약집
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• pp.147-148
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• 2017

• 한국항만경제학회지
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• 제31권4호
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• pp.17-38
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• 2015

정부는 2001년의 "항만부문사업의 예비타당성 표준지침"을 제정한 이후 지난 14년동안 동 지침을 이용하여 항만건설의 예비타당성조사를 수행하였다. 그러나 1999년부터 2011년 사이에 수행된 41개 항만관련 예비타당성조사를 분석한 결과 항만건설 미시행시 현실적으로 추정이 어려운 "선박대기비용 절감편익" 대신 추정이 용이한 부선하역을 가정하고 이에 의한 비효율성 개선을 편익으로 산정하였다. 그러나 부선하역의 질제 적용가능성과 이에 대한 편익의 과다추정 가능성이 지속적으로 제기되고 있는 실정이다. 이에 따라 본 연구에서는 항만건설 미시행 대안으로 인접항만의 이용가능성을 먼저 검토한 후 불가능할 경우 수출입화물과 목적화물에 한해 부선하역을 적용하는 방식을 제시하였으며, 환적화물의 경우 부선 적용이 비현실적으로 판단되어 미입항하는 방안에 대해 비용과 편익의 변동 가능성 제시하였다. 본 연구에서는 이러한 사례를 기존의 예비타당성 결과에 반영한 결과 일반화물과 컨테이너 화물 모두에서 기존의 부선하역 편익산정 방식보다 낮은 경제성을 제시하는 것으로 나타났다.

• 산업기술연구
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• 제17권
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• pp.313-322
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• 1997

As the weight of trucks increases, the need for concrete pavement also increases. Therefore, the addition of fly-ash may improve the properties of pavement concrete as well as recycle fly-ash. A full factorial experiment was performed using the primary variables, such as water-cement ratio, fly-ash substitution ratio, and maximum size of coarse aggregate, as a preliminary study for optimum mixture design for pavement concrete. The results of preliminary study indicates that the addition of fly-ash is the most important factor determining concrete strength, followed by the maximum size of coarse aggregate and water-cement ratio. It, also, shows the relative importance of fly-ash substitution ratio, compared to the water-cement ratio, and the interaction effects between the primary variables. Optimum mixture designs for pavement concrete incorporating fly-ash, that satisfied the target responses, were proposed in terms of fly-ash substitution ratio, water cement ratio and maximum size of coarse aggregate.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2015년도 추계 학술논문 발표대회
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• pp.66-67
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• 2015

This study compared and analyzed the job importance that site managers perceived by dividing the study scope into customized and expansion remodeling projects and deriving the job descriptions from previous studies. As a result, a total of 7 construction stages and 53 job descriptions were derived. As job importance in customized remodeling projects, removal and demolition works were the most important, followed by preliminary survey, and repair and reinforcement works. In addition, as job importance in expansion remodeling projects, preliminary survey is the most important, followed by civil engineering work, and repair and reinforcement works. It is considered that the job importance of the remodeling projects derived in this study will contribute to improving their job efficiency in the future.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2006년도 추계학술대회논문집
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• pp.244-247
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• 2006

Railway is superior to the other land transportation systems in aspects of energy efficiency and environmental problems. Energy efficiency and environmental problems are not considered during a preliminary feasibility study. Investment for railway is low because of low B/C in the economical efficiency analysis during the preliminary feasibility study. The body of this paper studies the data which can reflect environmental problems an assessment of environmental impact. Investment for railway would be higher when main environmental elements are considered before the choice of the railway lines.

• Advances in Traditional Medicine
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• 제8권4호
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• pp.448-451
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• 2008

Picrorhiza kurrooa Royle. is a well known medicinal plant among the indigenous medical practitioners of India. Present study is the first time to report the activity on the central nervous system. Preliminary study of the hot water extract showed significant depressant activity on the hole board test as evidenced from the ambulation and head dipping scores. The extract showed better activity compared to diazepam on the duration of pentobarbital induced sleeping time.

• 한국과학교육학회지
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• 제32권3호
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• pp.415-427
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• 2012

In this study, we conducted preliminary survey, diagnostic test and in-depth interview in order to study Korean pre-service chemistry teachers' understanding on entropy and investigate how Korean pre-service chemistry teachers deal with the natural phenomenon which is related to entropy conceptions. Firstly, as a result of the preliminary survey, it was found that pre-service chemistry teachers strongly recognized entropy as the degree of disorder. Secondly, the diagnostic test showed pre-service chemistry teachers were mostly confused about whether the entropy of the universe increases during a spontaneous change, and they had a tendency to interpret the natural phenomenon related to entropy change as the change of disorder. Finally, during in-depth interview, after we explained entropy change in all diagnostic test questions with the concept of microstate, pre-service chemistry teachers revealed a better understanding about entropy. Through this research, pre-service chemistry teachers had an opportunity to reflect on their deficiencies of entropy conceptions, which will ultimately help students to approach the concept of entropy more correctly.