• 국제학술발표논문집
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• The 3th International Conference on Construction Engineering and Project Management
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• pp.983-989
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• 2009

This study aims to systematically identify direct and indirect factors that influence labor productivity and to build a model that mathematically quantifies them so as to efficiently manage and increase labor productivity in the construction work. This study was performed based on the productivity model for workers in reinforced concrete construction projects, because it aims to establish a general construction labor productivity model that reflects many factors that influence labor productivity. Using statistical analysis, we found that the components that significantly influence productivity were the worker component, the work characteristic component, the work technique component, the work management component, the equipment & materials component, and the work guide component, while the work delay components did not significantly influence productivity. In addition, a priority analysis was performed based on the components that showed statistically significant effects. The results of the analysis indicated that the influence of work management component and the work technique component is more than that of the worker component and the work characteristic component. The construction labor productivity model that was formulated in this study could be used for the determining the standard productivity during the initial planning stage, so the best strategy for increasing labor productivity could be formulated.

• International Journal of Human Ecology
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• 제15권2호
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• pp.69-80
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• 2014

Guided by the exchange model, altruistic model, intergenerational solidarity theory, and cultural contexts, this study explored the determinants of financial intergenerational transfers between older parents and adult children in South Korea. We examined 18,820 parent-child dyads by using random-effects models on the first wave of the Korean Longitudinal Study of Ageing (KLoSA) data. Findings showed that downward financial intergenerational transfers were consistent with the self-interest exchange model but upward transfers did not support microeconomic theories. Family solidarity theory was generally supported by downward transfers but geographical proximity was not positively associated with upward transfers. Lastly, cultural contextual variables such as marital status, birth order, and sex of a child were found to be significant. Parents tended to both provide and receive more financial support from unmarried children than from married children. Within the same marital status, the hierarchy existed in order of the first-born son, the second or later sons, and daughters when it came to downward financial transfers. Regarding upward financial transfers, the preference in order was more complicated. The findings of this study help in understanding the intergenerational financial transfers in the Korean context.

• 노동경제논집
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• 제30권2호
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• pp.87-118
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• 2007

본 논문에서는 한국직업능력개발원의 "전문대 및 대학 졸업생 경제활동상태 추적조사" 2005년 자료를 주로 이용하여 대학서열화와 노동시장 성과 간의 관계를 지방대 졸업생에 대한 임금차별을 중심으로 분석하였다. 주요 결과로는 첫째, 지방대학 졸업생 월평균 임금은 174.77만원으로 수도권대학 졸업생에 비해 11.5% 낮았으나 지방대학의 낮은 수능점수에 상당 부분 기인하였다. 둘째, 위계선형모형(Hierarchical Linear Model)을 적용하여 학교의 임금효과를 추정한 결과 개인간 임금차이의 12.2%만이 학교간 차이에 기인하는 것으로 나타나 학교효과가 예상보다 작음을 확인하였다. 셋째, 대학 진학시의 선택편의(selection bias)를 고려한 Heckman형 2SLS 임금함수를 추정한 후 Neumark 임금분해를 시도한 결과 수도권대학과 지방대학 졸업생 간 임금격차는 전적으로 수도권대학 졸업생의 인적 속성과 직업 속성상의 우위에 기인하였으며, 특히 수도권에 집중된 상위권 대학의 영향이 결정적으로 작용하였다. 넷째, 분위회귀 기법을 적용하여 임금분위별 지방대생 차별을 분석한 결과 임금분위와 무관하게 대체로 -4.01%~-2.51% 범위의 임금차별이 관찰되었다.

• 한국경영과학회지
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• 제21권3호
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• pp.109-125
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• 1996

Biases and errors in the human being's reasoning process have been studied continuously by the researchers, especially psychlogists and social scientists. These bias phenomenon is classified on the basis of the origin, i. e. motivation and cognition. Furthermore the necessity of research on the bias in the management and management information system areas in increased more and more recently, which have their academic backgrounds in the psychology and social science. The biased information stream is transformed into the systematic error due to the motivation and cognitive bias of human-being, then its resulting phenomena are as follows; 1. the availability of salient information 2. preconceived ideas or theories about peoples and event 3. anchoring and perseverence phenomena. In order to reduce the information errors, Satty suggested the Analytic Hierarchy Process (AHP) that is the subject of this paper and that is widely used for evaluation of complex decision making alternatives. THerefore this paper studies AHP's effects and its limitations in applying to the management area. Thus this paper compared the performances of the 3 models : 1 the traditional additive regression model. 2 regression model using the factor score, and 3 the regression model with AHP. As a result, 3 models produce the different outcomes.

• Wind and Structures
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• 제5권5호
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• pp.423-440
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• 2002

The effects of the nonlinear (quadratic) term in wind pressure have been analyzed in many papers with reference to linear structural models. The present paper addresses the problem of the response of nonlinear structures to stochastic nonlinear wind pressure. Adopting a single-degree-of-freedom structural model with polynomial nonlinearity, the solution is obtained by means of the moment equation approach in the context of It$\hat{o}$'s stochastic differential calculus. To do so, wind turbulence is idealized as the output of a linear filter excited by a Gaussian white noise. Response statistical moments are computed for both the equivalent linear system and the actual nonlinear one. In the second case, since the moment equations form an infinite hierarchy, a suitable iterative procedure is used to close it. The numerical analyses regard a Duffing oscillator, and the results compare well with Monte Carlo simulation.

• Asia pacific journal of information systems
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• 제13권2호
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• pp.105-117
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• 2003

As E-commerce is getting more popular, consumers faces more decision complexity than ever before because they can get greater alternative choices. Futhermore, consumers are sometimes motivated to expand effort in making a good decision in the case of relatively important and non-routine decison, such as buying a house or car. Thus, a buying decision support function is required to help consumers make decisions that have the greatest effects on consumer's lives. We develop a propotype system of a web-based buying decision support system for a cyber shopping mall. A buying decision of a consumer is a multi-attribute decision problem and is supported using analytic hierarchy process model. The system was implemented using HTML, Java, Java applet, JSP.

• 대한건축학회논문집:계획계
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• 제34권5호
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• pp.129-138
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• 2018

The purpose of this study is to analyze and evaluate the significance of undulated planes of architectural landscape methodology, to assess if the methodology had potential to be a sustainable architectural model, to be experimented in future. To achieve this purpose, the historical origins and changes of the landscape is discussed to analyse how it influenced modern architecture. Then the effects of panoramic sensibility derived from the picturesque garden is analysed to evaluate the influence it had on the change of the perception of space and modern architecture and landscape design strategy. Then 1980s and 1990s' symposiums and landscape theories are examined. To find pivotal moment of merging landscape and architecture, the design schemes of Bernard Tchumi and OMA for La Villette competition are selected as manifestations to show co-existence of landscape and architecture. Afterwards Yokohama ferry terminal is analyzed to present the undulated planes deployed for the union of landscape and architecture, to the affect of uninterrupted spatial connectivity. The impact of undulated plane on interior is explored in analysis of Rolex Learning Center, consequently changing the relationship within functions of the interior and the role of circulation. Finally, the spatial characteristics and significance of undulated plane is explored. The spatial characteristics are, the relationship beyond the visual connection through seamless connection; the multiple access paths and discard of transition space thereby diminishing boundaries; the environmentalization of architecture by spatializing circulation and promoting in-hierarchy. The significance of undulated planes are, the synthesis form of architectural typology; the cultivation of public sense; the closest spatial type to the space of appearance referred to by Hannah Arendt.

• 한국건설관리학회논문집
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• 제9권5호
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• pp.95-103
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• 2008

정부의 강력한 정책의지에 따라 무분별하게 추진되던 재건축 사업이 상당기간 침체될 것으로 예상되며 이에 대한 대안으로 공동주택 성능향상과 자산가치 보호, 거주환경 개선을 위한 리모델링의 활성화가 예상되고 있다. 그럼에도 불구하고 대다수의 주민들은 재건축에 대한 선호도가 강하며 리모델링은 최후의 수단으로만 치부하고 있다. 이러한 현실은 리모델링에 비해 재건축이 시공성 및 사업성 측면에서 유리하다는 인식이 강하게 자리잡고 있기 때문이며 재건축 추진에 대한 평가방식인 안전진단이 개발의 활성화 및 최적의 방식을 제공하기보다 획일적인 규제 위주로 이루어져 있어 이를 불신하는 현실에서 기인한다고 볼 수 있다. 따라서 공동주택 개발사업을 추진하는데 있어 가장 적합한 방식을 선택할 수 있는 합리적인 평가안을 재 정립할 필요가 있다. 이에 본 고에서는 AHP 기법을 이용하여 평가 요소간의 중요성 및 가중치를 산출하고 이를 바탕으로 개발 사례에 적용 분석하여 향후 공동주택 개발을 위한 평가 방안에 활용하고자 한다.

• 벤처창업연구
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• 제11권2호
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• pp.233-247
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• 2016

세계적으로 확산되고 있는 로컬푸드산업은 한국에서도 도입되어 활성화되어가고 있다. 한국의 농산물 시장에서 유통비용이 차지하는 비율이 높은 것이 문제점이다. 유통비용 증가는 운송거리와 관련이 있다. 농산물의 유통비용증가는 가격과 품질 뿐만 아니라 온실가스(이산화탄소) 배출량 증가의 원인이 된다. 따라서 이러한 온실가스 배출을 저감 하고, 비효율적인 로컬푸드산업의 유통비용 문제를 해결하는 것이 필요하다. 본 논문에서는 로컬푸드산업의 지역거점센터 입지선정 요인을 접근성, 품질, 인구, 면적, 운송거리 5가지 요소로 선정하였다. 5가지 요소들의 상대적 중요도를 전문가 30명의 설문 응답지 내용을 반영하여 Analytic Hierarchy Process를 활용하여 분석하였다. 각 의사 결정 기준의 상대적 중요도는 품질(0.430)${\gg}$인구(0.262)${\gg}$운송거리(0.201)${\gg}$접근성(0.075)${\gg}$면적(0.033) 순으로 입지선정에 중요한 요소로 분석되었다. 본 논문에서 제시한 로컬푸드산업의 환경경영시스템 모델을 적용 분석하여, 로컬푸드산업의 지역거점센터 입지선정 평가 기준과 온실가스 저감의 효과를 분석하였다. 본 논문은 로컬푸드산업의 환경경영시스템의 모델을 적용 분석함으로서, 로컬푸드산업의 온실가스 문제를 해결하는 자료로 사용 될 것이다. 또한 기초자치단체 단위의 로컬푸드산업 운영을 위한 직매장 운영 결정 자료로 활용될 것이다. 그리고 로컬푸드산업의 경쟁력을 강화시켜, 대형유통업체와의 비교 우위를 가지는 자료로 사용될 것이다.

• Journal of Microbiology and Biotechnology
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• 제28권7호
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• pp.1052-1060
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• 2018

Numerous studies suggest that the effects of lactic acid bacteria (LAB) on oxidative stress in vivo are correlated with their antioxidative activities in vitro; however, the relationship is still unclear and contradictory. The antioxidative activities of 27 Lactobacillus plantarum strains isolated from fermented foods were determined in terms of 2,2-diphenyl-1-picrylhydrazyl, hydroxyl radical, and superoxide radical scavenging abilities, reducing activity, resistance to hydrogen peroxide, and ferrous chelating ability in vitro. Two fuzzy synthetic evaluation models, one with an analytic hierarchy process and one using entropy weight, were then used to evaluate the overall antioxidative abilities of these L. plantarum strains. Although there was some difference between the two models, the highest scoring strain (CCFM10), the middle scoring strain (CCFM242), and the lowest scoring strain (RS15-3) were obtained with both models. Examination of the antioxidative abilities of these three strains in $\text\tiny{D}$-galactose-induced oxidative stress mice demonstrated that their overall antioxidative abilities in vitro could reveal the abilities to alleviate oxidative stress in vivo. The current study suggests that assessment of overall antioxidative abilities with fuzzy synthetic models can guide the evaluation of probiotic antioxidants. It might be a more quick and effective method to evaluate the overall antioxidative abilities of LAB.