• 한국건축시공학회지
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• 제24권1호
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• pp.121-131
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• 2024

공사감리문서는 프로젝트의 수행과정을 제3의 독립적인 위치에서 모니터링한 종합적인 점검의견이라는 주요한 비정형 정보를 제공할 수 있다. 이와 같은 비정형 정보는 최근 분석방법론의 고도화에 따라 다양한 시사점을 제공할 수 있는 유의미한 자료로 평가받고 있다. 이에 본 연구는 건축공사의 최종 감리보고서 내 비정형 데이터를 대상으로 다양한 방법론을 활용하여 비용성과를 평가할 수 있는 프레임워크를 제시하였다. 세부적으로는 텍스트마이닝과 사회연결망분석을 통해 감리보고서 내 주요 키워드들을 도출하고, 해당 데이터들을 이항 로지스틱 회귀분석을 통해 분석하여 비용성과를 평가하였다. 그 결과, 감리보고서 내 비정형 데이터를 이용하여 추정된 비용성과 예측 정확도는 약 73% 수준으로 높게 도출되었다. 본 연구의 결과는 향후 건설산업에서 발생되는 다양한 비정형 데이터의 분석을 위한 기초자료로 활용이 가능할 것으로 예상된다.

• 한국전자거래학회:학술대회논문집
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• 한국전자거래학회 2000년도 종합학술대회발표논문집
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• pp.207-214
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• 2000

Over the last several decades, the topic of the source selection and evaluation has gained a great attention in the information systems community as an effective tool to acquire information systems in an organization. The source selection and evaluation process is a multiple-criteria decision-making problem associated with several evaluation issues. In this case study, evaluation issues include management, technologies, logistics, and cost. This case study was conducted to compare a new source selection and evaluation process by using the analytic hierarchy process with the traditional approach. This study provides useful insight about how to apply the analytic hierarchy process technique to the traditional approach.

• KIEAE Journal
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• 제2권4호
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• pp.65-72
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• 2002

In this study, the evaluation of environmental performance of the building energy system of domestic commercial sector was carried out. Based on the theory of linear programming model, we established an evaluation model satisfying object functions and constraint conditions. Employing the model, the evaluation of building energy system was performed under the consideration of cost and environmental constraint conditions. As an evaluation tool, MARKAL (MARKet Allocation) known as a market distribution model was employed. We analyzed scenarios of Case I (Base Scenarios) through Case IX established by the combination of the components of building energy system such as glazing, building skin, core, and heat source system. According to the results of the evaluation, highest contribution on the useful energy demand was obtained from the building energy system combined with solar heat source system, when the total amounts of $CO_2$ exhaust as an environmental constraint condition is assumed to be the level of 1995.

• 국제학술발표논문집
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• The 1th International Conference on Construction Engineering and Project Management
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• pp.1138-1143
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• 2005

As the importance of building maintenance is being emphasized, studies regarding the efficient building maintenance focus on the evaluation of the maintenance plan, implementation and its cost only while the evaluation of the maintenance performance is nearly ignored. At this point when the importance is placed on the performance design we need to have methods to improve maintenance performance of the buildings in Design Phase. The purpose of this study was to set the design evaluation items to improve the maintenance performance of the buildings. Through the review of the existing literature, we set the concept of the maintenance performance and suggested evaluation items to evaluate the maintenance performance through the analysis of domestic and overseas certification and design guidelines.

• 한국경영정보학회:학술대회논문집
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• 한국경영정보학회 2007년도 International Conference
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• pp.509-514
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• 2007

Most of the IS continuance research has assumed that IS use is activated by an intention to use, which in turn is determined by the evaluation of IS usage. Perceived usefulness is one of the evaluation variables most widely used. Typically, the past studies adopt this perceived usefulness because it views continuance as an extension of acceptance behavior. However, the literature on interpersonal relationships suggests that individuals are motivated to maintain relationships either because they genuinely want to or they believe they have no other option. The former is referred to as dedication-based relationship maintenance and the latter as constraint-based relationship maintenance. The IS continuance can be considered as the relationship maintenance situation with the existing IS that the user is currently using. The belief constructs previously used in IS continuance researches fall into the category of dedication-based ones. Additional constraint-based belief constructs are needed to explain the IS continuance behavior. In this regard, switching cost represents an important avenue for better understanding and predicting customer retention in that it can be regarded as the constraint-based motivation for relationship maintenance or IS use continuance. For an empirical exploration, 275 samples were collected from the users of a web portal site. Data analysis using Structural Equation Modeling (SEM) shows that perceived usefulness shows a significant direct effect on continuance intention while perceived switching cost significantly affects continuance usage.

• 한국항행학회논문지
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• 제15권6호
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• pp.977-985
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• 2011

항공기 분리보증은 자유비행 분리보증의 핵심요구사항이다. 본 논문에서는 자유비행 공역 효율성 측정을 위한 다양한 분리보증 및 효율성 측정 모델을 고찰하고, 자유비행 분리보증을 위한 포텐셜 필드 알고리즘과 기하학적 알고리즘, 두 가지의 충돌회피 기법을 모델링 하여 항공기 성능데이터와 두 가지 조건의 시나리오 상황에서 분리보증 해결과 운항 효율성을 측정하였다. 실험결과 자유비행 공역 하에서 기하학적 알고리즘 적용이 포텐셜 필드 알고리즘 보다 분리보증 해결, 운항 효율성 측면에서 우수하였으며, 동일한 알고리즘에서도 선회각, 속도 복합모델인 기하학적 결합 알고리즘이 더욱 효율적인 것으로 나타났다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2003년도 춘계학술대회 논문집
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• pp.5-8
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• 2003

This paper presents a methodology to be able to select an appropriate RP system that suits the end use of a part. Evaluation factors used in process selection include major attributes such as accuracy, roughness, strength, elongation, part cost and build time that greatly affect the performance of RP systems. Crisp values such as accuracy and surface roughness are obtained with a new test part developed. The test part is designed with conjoint analysis to reflect users' preference. The part cost and build time that have approximate ranges due to cost and many variable parameters are presented by linguistic values that can be described with triangular fuzzy numbers. Based on the evaluation values obtained, an appropriate RP process for a specific part application is selected by using the modified TOPSIS(Technique of Order Preference by Similarity to Ideal Solution) method. It uses crisp data as well as linguistic variables, and each weight on the alternatives is assigned by using pair-wise comparison matrix. The ranking order helps the decision making of the selection of RP systems.

• 산업경영시스템학회지
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• 제33권3호
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• pp.137-145
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• 2010

The objective of this paper is to evaluate the equilibrium price between PSTN and VoIP telephony services in the case of non-linear utility function. Currently there are two types of wired phone services we are known PSTN (Public Switched Telephone Network) and VoIP (Voice over Internet Protocol). The PSTN telephony which provide high quality service and VoIP which provides relatively low quality service form a vertically differentiated oligopoly. Therefore, the evaluation of the equilibrium price between PSTN and VoIP services is very important to wired phone service providers. The equilibrium price depends on the state of the service cost function has been proved different value. This paper was evaluated each equilibrium price for the state of the linear cost function and non-linear cost function. Subsequently, this paper analyzed the demand of both services and the equilibrium profit which can maximize the profit of both service providers.

• The Journal of Asian Finance, Economics and Business
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• 제7권4호
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• pp.275-286
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• 2020

The study explores factors that affect the performance of responsibility accounting at public universities in Vietnam. The study conducted a survey of 130, out of 154 public universities in Vietnam and uses regression analysis methods. The results identify eight groups of factors affecting the performance of responsibility accounting at these establishments of higher education: Division of the organization into responsibility centers, Estimation and Reality, Cost and income allocation, University autonomy, Management decentralization, Estimation, Reward, and Report. Costs and income allocation for responsibility centers, university autonomy, and the division of universities into responsibility centers are shown to significantly affect the performance of public universities in Vietnam. The results show that the performance of responsibility accounting at public universities in Vietnam is influenced by decentralization of management, division of the organization into responsibility centers, reward, cost and income allocation, estimation, evaluation of the results achieved between the estimation compared with reality, release of reports and university autonomy. Among the factors, cost and income allocation, university autonomy, division of the organization into responsibility centers, reward and evaluation of results achieved between estimation and reality have strong impacts. The study findings also indicate that the school council does not affect responsibility accounting at these universities.

• 한국전산구조공학회논문집
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• 제17권2호
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• pp.141-150
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• 2004

최근의 철근콘크리트 교량의 부식과 노후화에 대한 관심이 많다. 콘크리트 안의 부식되어진 철근은 교량구조의 안전뿐만 아니라 철근콘크리트 부재의 휨강도에도 영향을 준다. 기존의 성능평가를 고려한 철근콘크리트속의 부식율 및 휨강도 특성 경제성 분석은 명확하지 많았다. 본 연구의 목적은 철근의 부식감소에 따라서 철근콘크리트 교량의 저항강도기능과 생애주기비용을 연구하고자 한다 따라서 현재의 부식 및 휨강도 산출공식을 제시하고 부식된 철근 콘크리트 교량의 잔여수명을 정확히 평가하고자 한다.