• Nuclear Engineering and Technology
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• 제49권5호
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• pp.896-904
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• 2017

Several Generation IV nuclear reactor concepts have goals for optimizing investment recovery through phased introduction of multiple units on a common site with shared facilities and/or reconfigurable energy conversion systems. Additionally, small modular reactors are suitable for remote deployment to support highly localized microgrids in isolated, underdeveloped regions. The long-term economic viability of these advanced reactor plants depends on significant reductions in plant operations and maintenance costs. To accomplish these goals, intelligent control and diagnostic capabilities are needed to provide nearly autonomous operations with anticipatory maintenance. A nearly autonomous control system should enable automatic operation of a nuclear power plant while adapting to equipment faults and other upsets. It needs to have many intelligent capabilities, such as diagnosis, simulation, analysis, planning, reconfigurability, self-validation, and decision. These capabilities have been the subject of research for many years, but an autonomous control system for nuclear power generation remains as-yet an unrealized goal. This article describes a functional framework for intelligent, autonomous control that can facilitate the integration of control, diagnostic, and decision-making capabilities to satisfy the operational and performance goals of power plants based on multimodular advanced reactors.

• 한국지반환경공학회 논문집
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• 제20권12호
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• pp.33-39
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• 2019

The upsurge of population, internal migration, economic activities and developmental works has brought significant land use and land cover (LULC) change over the period of 1990 and 2010 in the Bagmati basin of Nepal. Along with alteration on various other ecosystem services like water yield, water quality, soil loss etc. carbon sequestration is also altered. This study thus primary deals with evaluation of LULC change and its impact on the soil carbon storage for the period 1990 to 2010. For the evaluation, InVEST (Integrated Valuation of Ecosystem Services and Tradeoffs) Carbon model is used. Residential and several other infrastructural development activities were prevalent on the study period and as a result in 2010 major soil carbon reserve like forest area is decreased by 7.17% of its original coverage in 1990. This decrement has brought about a subsequent decrement of 1.39 million tons of carbon in the basin. Conversion from barren land, water bodies and built up areas to higher carbon reserve like forest and agriculture land has slightly increased soil carbon storage but still, net reduction is higher. Thus, the spatial output of the model in the form of maps is expected to help in decision making for future land use planning and for restoration policies.

• 한국전자거래학회지
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• 제19권1호
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• pp.1-14
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• 2014

본 논문의 목적은 재고관리를 위한 RFID 시스템을 도입하는데 있어서 적합한 비용을 산출하여 경제성을 평가하고, SCM 환경에서 생산시점 재고관리 모형을 설계하는 것이다. 경제성 분석은 변화하는 태그의 가격에 따른 총 생산 순이익을 기준으로 하였으며, 초기투자가 필요한 시스템에 적용될 수 있게 결정 모델을 설정하였다. 재고관리 시스템은 900MHz 대역의 수동형 태그를 사용하는 RFID 리더와 4개의 안테나를 이용하여 구현하였다. 그 결과 태그가격의 한계치 설정에 따른 구현 시스템의 도입을 결정하는 도구를 개발하였으며, 안테나의 방향성 있는 배치에 의해서 성공적인 재고관리 시스템을 설계하였다.

• 산업공학
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• 제25권2호
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• pp.204-215
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• 2012

Recently, more and more firms are considering the adoption of RFID technology because it is expected to make process automation easier and has many different application areas. A review of existing studies about RFID adoption methodology shows that the most of the proposed methodologies are mainly based on economic evaluations. However, in the near future when the adoption and diffusion of RFID become major forces among business firms, it would surely have some limits to decide its adoption solely on the basis of economic considerations. In order for all the important strategic objectives to be considered during the major decision processes, it is necessary to make explicit what the decision makers really want to achieve from the RFID system. In this paper, we propose a general value model of RFID system which can provide an overall vision of all values RFID adoption may offer and a way to search and evaluate alternatives on the basis of these values. Especially, this model contains not only opportunities but also risks of RFID adoption so that a balanced consideration can be made. The model building process was essentially based on the 'value-focused thinking' approach proposed by R. Keeney. The proposed model is expected to provide insights about what to do in the process of introduction in order to maximize the potential benefits and minimize the negative risks. Referring to this value model, the important decisions would have greater chance to be based on a balanced consideration of opportunities and risks.

• 한국건설관리학회논문집
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• 제21권6호
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• pp.84-94
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• 2020

모듈러 공사는 현장이 아닌 공장에서 제작되기 때문에 반드시 운송공정이 포함되며, 운송장비에 따라 공법과 모듈의 크기 결정에 영향을 미치므로 설계단계뿐 아니라 시공계획단계에서 매우 중요하다. 그러나 운송에 관한 연구는 스케쥴 관리 차원에서만 논의되고 있어 운송에 큰 영향을 끼치는 운송 장비를 의사결정하기에 참고할 객관적 기준이나 자료가 부족하다. 본 연구에서는 모듈러 객체 공사에서 시공 계획수립 시 각 공사별 체계적 검토와 객관적 의사결정을 할 수 있도록 운송장비 영향요인과 의사결정지원모델을 제시하였다. 운송장비 선정에 영향을 끼치는 요인을 도출하기 위해 문헌 분석과 전문가 인터뷰를 진행하였고 이를 통해 총 5개의 영향요인과 영향요인별 세부요인을 도출하였다. 다중매트릭스를 이용하여 의사결정 지원모델을 구축하였고 두 가지 사례에 의사결정 지원모델을 적용하여 영향요인의 쌍대비교와 영향요인별 대안의 적합도 쌍대비교를 실시했다. 본 연구에서 제시한 의사결정 모델은 평가과정을 수리적으로 확인할 수 있어 현장에서 장비 선정과정의 객관성과 투명성을 확보하고 운송연구의 기초자료로서 활용될 수 있을 것이다.

• 산업공학
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• 제20권3호
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• pp.387-394
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• 2007

Numerous countries promote business programs to revitalize local economy, increase employment, and nurture high-tech industries. Recently, a number of business incubators have been established and operated with aims to adapt to changing environment and increase economic competitiveness in Korea. To give satisfactory results of governmental policy, the requirement to develop the evaluation model to support effective operations of business incubators using the objective and rational criteria is growing. The purpose of this study is to develop evaluation model in Business Incubator using Data Mining Process. We suggested the evaluation model of business incubator, 'Score-5 RS' consists of making evaluation factor process using weighted sum and 5-grade classification and analyzing process by Decision Tree algorithm.

• 한국품질경영학회:학술대회논문집
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• 한국품질경영학회 2006년도 춘계학술대회
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• pp.400-404
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• 2006

The environmental problem come because the demage cost of environmental pollution is not properly reflected in market price. The government regulations for market is justified to solve the problem. The policy needs a close analysis of environmental, economical effect for the point of time, methods, rational decision making of the government regulations. Especially, we need to assume and analyze about social expenses by environmental pollution and policy execution. The cost-benefit analysis about environmental pollution is used to support decision making. The value of benefit about damage by environmental pollution or about improvement changes a monetary unit through the cost-benefit analysis. The working like this is said environmental material valuation or measuring valuation. This work is studied about looking for proper analysis model to apply our environmental materials.

• 청정기술
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• 제29권1호
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• pp.59-70
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• 2023

This study aims to introduce a biowaste processing system that uses spent coffee grounds and implement a real options method to evaluate the proposed process. Energy systems based on eco-friendly fuels lack sufficient data, and thus along with conventional approaches, they lack the techno-economic assessment required for great input qualities. On the other hand, real options analysis can estimate the different costs of options, such as continuing or abandoning a project, by considering uncertainties, which can lead to better decision-making. This study investigated the feasibility of a biowaste processing method using spent coffee grounds to produce biofuel and considered three different valuation models, which were the net present value using discounted cash flow, the Black-Scholes and binomial models. The suggested biowaste processing system consumes 200 kg/h of spent coffee grounds. The system utilizes a tilted-slide pyrolysis reactor integrated with a heat exchanger to warm the air, a combustor to generate a primary heat source, and a series of condensers to harness the biofuel. The result of the net present value is South Korean Won (KRW) -225 million, the result of the binomial model is KRW 172 million, and the result of the Black-Scholes model is KRW 1,301 million. These results reveal that a spent coffee ground-related biowaste processing system is worthy of investment from a real options valuation perspective.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2020년도 학술발표회
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• pp.78-78
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• 2020

The Se San and Srepok river basins (2S) are the two major tributaries of the Mekong River, both of which originate in the territory of Viet Nam and flow to Cambodia to meet at Stung treng with the Sekong river (originating in Lao PDR) to form the 3S river basin before joining the Mekong mainstream. In the territory of Viet Nam, the 2S river basins are located in the Central Highlands including 5 provinces, arranged by geographical location from north to south namely Kon Tum, Gia Lai, Dak Lak, Dak Nong and Lam Dong. This is a region with a very important strategic position in terms of economy, politics and defense for the whole country with many potential advantages for economic development. However, the limited and vulnerable basin water resources are under the pressure of socio-economic development in line with increasing water demands for various sectors. In order to overcome the water management challenges, a long-term water resources planning has conducted to support the 2S River Basin Committee (RBC) in effective planning and operation as part of the WB Mekong-Integrated Water Resources Management (IWRM) Project. This paper introduces the outline and progress of the river basin planning using analytical DSS toolkits to analyze, evaluate and formulate the planning options.

• 대한토목학회논문집
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• 제35권6호
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• pp.1377-1385
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• 2015

우리나라 경제성장의 핵심 원동력이었던 건설업은 오늘날 환경부하량 배출이 가장 많은 산업으로 류되고 있다. 이에 건설업은 친환경을 실현하고자 많은 노력을 기울였지만 그 효과는 미비한 실정이다. 본 연구는 사업 초기단계에서 친환경 VE가 적용이 가능하면 건설업의 친환경 효과가 클 것이라 판단되기에 발주자의 친환경 VE 의사를 파악 할 수 있는 NIA 모델을 개발 후 시뮬레이션 하였다. 경북북부권 환경에너지 종합타운 조성 민간사업의 제안 보고서를 기반으로 친환경 VE 의사를 묻는 20문항을 시뮬레이션 한 결과 50%의 친환경 의사가 있음을 도출 할 수 있었다. 본 연구의 결과는 친환경 VE 의사를 도출하기 위하여 설문조사를 한 후 NIA를 활용하여 건설 초기단계에서 친환경적인 설계를 위한 의사결정시 판단자료로 제공 될 수 있을 것이다.