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사례기반추론을 이용한 강박스거더교의 개략공사비 산정 및 검증
정민선,경갑수,전은경,권순철,Jung, Min-Sun,Kyung, Kab-Soo,Jeon, Eun-Kyoung,Kwon, Soon-Cheol 한국강구조학회 2011 韓國鋼構造學會 論文集 Vol.23 No.5
공공 건설공사에서 공사 단계별 합리적인 공사비를 산정하는 것은 국가 예산의 효율적 확보 및 집행 등에 있어 매우 중요한 요소이다. 본 논문에서는 사업 초기단계의 가용정보가 제한된 조건에서 사례기반을 적용하여 강박스거더교의 개략공사비 추정 방안을 제시하였다. 또한 공사비 예측모델을 기존 설계사례에 대해 적용하여 본 논문에서 제시한 개략공사비 추정 모델의 정확성을 검증하였다. 연구 결과, 오차율은 비교적 안정적인 결과를 도출할 수 있었다. 따라서 국가 예산의 집행이나 수립에서 개략공사비 추정을 효율적으로 제시 할 수 있을 것으로 판단된다. To effectively come up with and secure a national budget, it is very important to estimate the reasonable construction cost of each step in public construction projects. In this study, the approximate construction cost of a steel box girder bridge in the early stages of the project, on which available information is limited, was proposed using case-based reasoning. In addition, construction cost estimation models were used for existing sample design models, and the accuracy of the estimation model for the presented cost was verified. The analysis results showed that the error rate was comparatively stable. Therefore, it is expected that construction cost estimation will be effectively suggested in the country's budget preparation.
기독대학생의 내재적 종교성향과 진로준비행동과의 관계에서 긍정적 환상의 매개효과
정민선 ( Min Sun Jung ),박미하 ( Mi Ha Bak ) 한국복음주의상담학회 2015 복음과 상담 Vol.23 No.1
This study aims to verify the mediating effect of positive illusions in the relationship between Christian university students’ intrinsic religious orientation and their career preparation behavior. 172 Christian university students were sampled, and their intrinsic religious orientation, their positive illusion, and their career preparation behavior were measured. Use SPSS WIN 18.0 and AMOS 18.0. As a result, Christian university students’ intrinsic religious orientation and their positive illusions, and their positive illusions and their career preparation behavior had a positive correlation, but their intrinsic religious orientation and their career preparation behavior had no correlation. Second, the positive illusion mediating structural model in the relationship between Christian university students’ intrinsic religious orientation and their career preparation behavior was fit for the data, and all paths except the path from their intrinsic religious orientation to their career preparation behavior were statistically significant. Third, the positive illusion’s mediating effect in the relationship between the intrinsic religious orientation and the career preparation behavior was found to be a complete mediator. This suggests that Christian university students’ career behavior promoted their career preparation behavior through their positive illusions rather than directly influenced their intrinsic religious orientation; thus, the role that Christian university students’ positive illusions played in promoting their career preparation behavior, and its implications in counseling were discussed. Lastly, this research’s significance and limitations, and follow-up research direction were discussed.
시멘트계 재료의 pH 저하 저항성을 이용한 콘크리트 배합의 골재량 예측
정민선(Jung, Min-Sun),안기용(Ann, Ki Yong),김상효(Kim, Sang-Hyo) 한국구조물진단유지관리학회 2009 한국구조물진단학회 학술발표회논문집 Vol.2009 No.2
For identifying aggregate content in a concrete mix design, cement paste, mortar and concrete at 30% of water-cement ratio were cast in looking into the buffering capacity of cement matrixes to a pH fall. The resistance to a pH fall of suspension, consisting of powder sample and still water, was quantified after 200 days curing by assessing the buffering capacity against nitric acid. The pH of suspension gradually decreased as the amount of nitric acid increased, in particular, at 10 in the pH, a sharp decrease was observed. It was found that the acid concentration at 10 in the pH was dependent on aggregate content of mortar and concrete. The correlation of this results can fingerprint a concrete mix design about aggregate content.