• 대한토목학회논문집
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• 제26권6D호
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• pp.945-950
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• 2006

자전거 도로 건설 같이 공공사업 성격이 강한 경우, 생활환경개선, 지역균형발전, 양호한 경관형성 등 다양한 도로기능 편익을 지니고 있는데 이들 항목은 기존 경제성 분석의 경우에서는 간과되는 측면이 있다. 이에 본 연구에서는 비시장재 가치를 평가하기 위하여 환경경제 분야에서 많이 적용하고 있는 조건부가치측정법(CVM : Contingent Valuation Method; 이하 CVM)을 이용하여, 실제로 자전거도로가 건설(해안선 자전거 일주 도로 건설의 예)됨으로써 발생하게 될 지역균형 발전 및 자전거 이용활성화를 고려하여, 시민들에게 직접 설문조사(전국 256가구)를 수행하고, CVM 방법론에 따른 지불의사액(Willing to Pay : WTP) 및 편익을 추정하였다. 그 결과 평균 WTP는 최소 2,114원 정도로 나타났다. 향후, 이러한 CVM 기법은 기존 경제성 분석을 활용한 편익 산출로는 한계가 있는 도로 건설 분야 중 도로교 건설에 따른 경관평가, 환경 개선에 따른 편익, 삶의 질 향상 등에 널리 활용될 수 있으리라 판단된다.

• 한국BIM학회 논문집
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• 제3권3호
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• pp.9-18
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• 2013

In case of applying the BIM method in the civil engineering of irregularly shaped structure, BIM method began to be introduced in the current building engineering area compared with the expected effects of the relatively high construction productivity has been recognized. In this paper, I have developed quantity calculation algorithms applying it to earthwork and bridge construction, tunnel construction, retaining wall construction, culvert construction and implemented BIM based 3D-BIM Modeling quantity calculation. Structure work in which errors occurred in range between -6.28% ~ 5.17%. Especially, understanding of the problem and improvement of the existing 2D-CAD based of quantity calculation through rock type quantity calculation error in range of -14.36% ~ 13.07% of earthwork quantity calculation. It's benefit and applicability of BIM method in civil engineering. In addition, routine method for quantity of earthwork has the same error tolerance negligible for that of structure work. But, rock type's quantity calculated as the error appears significantly to the reliability of 2D-based volume calculation shows that the problem could be. Through the estimating quantity of earthwork based 3D-BIM, proposed method has better reliability than routine method. BIM, as well as the design, construction, maintenance levels of information when you consider the benefits of integration, the introduction of BIM design in civil engineering and the possibility of applying for the effectiveness was confirmed. In addition, as the beginning phase of information integration, quantity document automation program has been developed for activation of BIM. And automatically enter the program code number, linkage and manual volume calculation program, quantity document automation programs, such as the development is now underway, and step-by-step procedures and methods are presented.

• 전기학회논문지
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• 제59권4호
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• pp.679-685
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• 2010

As the electrical power industry is restructured, the electrical power exchange is becoming extended. One of the key information used to determine how much power can be transferred through the network is known as available transfer capability (ATC). To calculate ATC, traditional deterministic approach is based on the severest case, but the approach has the complexity of procedure. Therefore, novel approach for ATC calculation is proposed using cost-optimization method, well-being method and risk-benefit method in this paper. This paper proposes the optimal transfer capability of HVDC system between mainland and a separated island in Korea through these three methods. These methods will consider production cost, wheeling charge through HVDC system and outage cost with one depth (N-1 contingency).

• 한국안전학회지
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• 제17권1호
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• pp.68-71
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• 2002

A research on accident loss calculation for polyol process without safety management activities, and safety cost estimation using process risk assessment has been implemented. In order to estimate a magnitude of loss, accident scenarios were made by combining result made from HAZOP Study method with accident possibility analysis results implemented with FTA. Also effect assessment was implement for accident consequence of each scenario. And minimum possible loss cost has been calculated when safety investment do or not. Result from cost-benefit analysis was shown as approximately \335 billion(=USS44,000 billion), as cost after subtracting safety management cost from minimum possible loss cost.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2011년도 제42회 하계학술대회
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• pp.686-687
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• 2011

In this paper, the method on calculating benefits of combined heat and power is introduced for standard evaluation in electrical power system. This paper calculates benefits about new national viewpoint and viewpoint of independent power producers and assesses benefits of combined heat and power in Korea and In Seoul national capital area. Benefit costs are composed of avoid cost of centralized generation, line upgrading adjustment, loss adjustment and electrical power trade cost per year in earlier study, in addition trade cost of CO2, construction cost of combined heat and power for accurate calculation. Benefit of combined heat and power is calculated by simulation results of real electrical power system.

• 대한전기학회논문지:전력기술부문A
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• 제54권11호
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• pp.533-539
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• 2005

According to NERC definition, Available Transfer Capability (ATC) is a measure of the transfer capability remaining in the physical transmission network for the future commercial activity. To calculate Available Transfer Capability, accurate and defensible Total Transfer Capability, Capacity Benefit Margin and Transmission Reliability Margin should be calculated in advance. This paper proposes a method to quantify time varying Available Transfer Capability based on probabilistic approach. The uncertainties of power system and market are considered as complex random variables. Total Transfer Capability is determined by optimization technique such as SQP(Sequential Quadratic Programming). Transmission Reliability Margin with the desired probabilistic margin is calculated based on Probabilistic Load Flow analysis, and Capacity Benefit Margin is evaluated using LOLE of the system. Suggested Available Transfer Capability quantification method is verified using IEEE RTS with 72 bus. The proposed method shows efficiency and flexibility for the quantification of Available Transfer Capability.

• KDI Journal of Economic Policy
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• 제36권1호
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• pp.43-80
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• 2014

본고는 조건부가치측정법을 비용편익분석에 이용하기 위하여 공공시설의 신설에 따른 총편익의 산정을 보다 엄밀히 수행하는 방법을 제시한다. 즉, 설문을 통해 가구당 지불의사액을 추정하는 경우, 응답자의 소득 및 응답자의 거주지와 해당 공공시설 사업지 간의 거리가 지불의사액에 영향을 미치는지를 확인하고자 한다. 구조적 효용격차모형을 이용한 사례분석 결과 지불의사액에 대한 소득효과 및 거리-소멸 효과가 존재함을 확인하였으며, 총편익의 산정 시 이들을 고려하지 않는 경우 산정된 총편익의 값이 크게 달라질 수 있음을 보였다. 이에 본고는 조건부가치측정법을 비용편익분석에 이용하는 경우 총편익의 산정에 있어 주의를 기울여야 함을 강조한다. 비용편익분석에 있어 총비용의 추정이 정확히 이루어진다 하더라도 가구당 지불의사액의 추정 및 이들을 합산하여 총편익을 산정하는 방식이 옳지 못할 경우 편익/비용(B/C) 비율이 크게 달라질 수 있기 때문이다. 한편, 효용격차 구조모형을 따르지 않고 임의적으로 유사한 추정을 수행한 결과는 구조모형의 추정치와 매우 큰 차이를 보임을 알 수 있었다. 따라서 총편익의 산정은 구조모형의 설정을 따르는 것이 바람직할 것이다. 마지막으로 시뮬레이션을 통해 모형의 적합성을 검증하였으며, 소득효과와 거리-소멸 효과를 고려하지 않는 경우 지역균형발전의 관점에서 바람직하지 못한 총편익의 추정 결과를 얻음을 밝혔다.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 1998년도 가을 학술발표회 논문집
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• pp.352-361
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• 1998

The post-processing modules are parts of an integrated system for reinforced concrete structures. This modules are composed of two modules: member design module and calculation report module. The purpose of this paper is to develope modules that increase efficiency and usefulness of an integrated system used reinforced concrete structures design. The development of post-processing modules is necessary for user to design reinforced concrete structures conveniently and quickly. This modules are connected with central database for the benefit of storing amount of input/output data and being used system with little effort. Post-processing modules used Object-Oriented concepts and techniques include identity, classification, polymorphism, and inheritance. Member design module automatically converts no good members into satisfied members by changing section size or reinforcement bar arrangement. This module can be operated both independent member design modules with user input and a part of integrated system with database input. If user operates member design module, calculation report module is created automatically.

• International Journal of Naval Architecture and Ocean Engineering
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• 제7권3호
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• pp.500-508
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• 2015

High-speed heavy loaded monohull ships can benefit from application of drag-reducing air cavities under stepped hull bottoms. The subject of this paper is the steady hydrodynamic modeling of semi-planing air-cavity hulls. The current method is based on a linearized potential-flow theory for surface flows. The mathematical model description and parametric calculation results for a selected configuration with pressurized and open air cavities are presented.

• 정보관리학회지
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• 제22권3호
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• pp.147-162
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• 2005

기업이나 연구소 등에서 운영하는 전문도서관의 경제적 가치 평가에 대한 필요성이 제기됨에 따라 본 연구는 전문도서관 주요 서비스의 가치평가에 대한 새로운 접근방법을 제시하였다. 선행연구의 이론과 모형에 타당성 평가를 통하여 본 연구에 적용할 편익측정요소와 분석방법을 도출하였으며, 적합성 평가는 보편타당성과 적용가능성을 기준으로 삼았다. 서비스에 어떤 유형의 자원(물적 자원 또는 인적 자원)이 사용되었는지에 따라 측정요소와 방법론을 달리 적용하였으며, 이를 토대로 전문도서관 주요 서비스의 가치평가를 위한 산출식을 제시하였다. 전문도서관 서비스의 경제적 가치평가를 위한 분석모형 개발은 서비스의 가치에 대한 객관적 입증이 가능해져서 전문도서관의 진정한 가치를 알릴 수 있는 계기가 될 수 있을 것으로 사료된다.