• 한국정밀공학회지
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• 제26권2호
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• pp.26-34
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• 2009

This paper is related to MQL (Minimum Quantity Lubrication) milling process, which is one of the environmentally friendly cuttings. The objective is to compare MQL milling process with conventional cutting fluid systems. To this end, machinability of MQL milling process was investigated, followed by the cost evaluation. Cutting force, surface roughness, tool wear, and cutting temperature were compared with each cutting fluid method. Consequently, total production costs wear evaluated with the mathematical models in terms of machining cost and cutting fluid loss.

• Journal of Nutrition and Health
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• 제36권5호
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• pp.515-527
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• 2003

Objectives： A meta-analysis of the literatures was conducted to evaluate the cost-effectiveness of medical nutrition therapy by dietitians. Methods : The 30 studies were identified from a computerized search of published research on MEDLINE, Science-Direct and the PQD database until May, 2002 and a review of reference lists. The main search terms were“dietitian”,“dietary intervention”,“nutrition intervention”, “cost”,“cost-effectiveness”and“cost-benefit analysis”. The subgroup analysis was performed by publication year, study design, intervention provider, type of patient (in/out-patient) and type of cost (total cost/direct cost). Two reviewers independently selected trials for inclusion, assessed the quality and extracted the data. Results : The 30 studies were identified using the electric database search and bibliographies. The 17 trials were eligible for inclusion criteria, then the systematic review and a meta-analysis were conducted on effectiveness and cost-effectiveness of medical nutrition therapy. The quality of the studies was evaluated using the quality assessment tool for observational studies. The quality score was 0.515 $\pm$ 0.121 (range : 0.279-0.711, median : 0.466). The meta-analysis of 17 studies based on the random effect model showed that medical nutrition therapy was highly effective in treating the diseases (effect size 0.3092 : 95% confidence interval 0.2282-0.3303). The vote-counting method, one of meta-analysis methods, was applied to evaluate the cost-effectiveness of medical nutrition therapy conducted by dietitians. Two criteria (method 1, method 2) for voting were used. The calculated p-values for method 1 (more conservative method) and method 2 (less conservative method) were 0.1250 and 0.0106, respectively. Medical nutrition therapy by dietitians was significantly cost-effective in the method 2. Conclusion. This meta-analysis showed that the effectiveness of medical nutrition therapy was statistically significant in treating disease (effect size 0.3092), and that the cost-effectiveness of medical nutrition therapy was statistically significant in the method 2 (less conservative method) of vote counting. (Korean J Nutrition 36(5): 515~527, 2003)

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 추계학술대회 논문집 전력기술부문
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• pp.259-261
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• 2002

KEPCO(Korea Electric Power Corporation) has been management alone before some time. However through the electrical industry reorganization generation and KPX(Korea Power Exchange) were separated on 2001. A marketing and distribution part will be separated in the future. While many problem for appear in future. how to management for power system network is important. unfortunallity, electrical power industry is starting point right now. Thus, detail data is incomplete for this field and detail research for this field is required with distribution reorganazation. In this paper suggest for customer interruption cost compute method to establish a standard. The standard is need to security operation of power system network. The customer interruption cost compute method necessity of customer interruption cost compute method is minimizing process for total cost. As final total cost compute through the interruption cost compute, we can recognize investment point exactly. We cited foreign survey questions, because exactly matched survey questions for in the country circumstance is not exist. And process to survey performance suggest after modify for match in the country circumstance. Survey questions that suggested fer this paper are classified five categories. This paper suggests to detail survey questions and survey method before survey and suggest to how to customer interruption compute when survey data is ensured. Moreover this paper suggest to average interruption cost compute for residential customer using statistical method.

• 산학경영연구
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• 제3권
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• pp.183-210
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• 1990

In this study traditional depreciation method has been analysed carefully and then compared with the depreciation on current cost basis for the purpose of reviewing the basic theory underlying depreciation on current cost basis in view of the current situation demanding new method of depreciation. In this treatise the inevitability of rejecting the basic theory of depreciation and traditional depreciation method has been treated. Furthermore the probable consequence when such refutation of traditional depreciation occurs is studied. How to resolve such problems and what is the basis for claiming for depreciation on current cost basis have been also analysed. Through this analysis and research the following conclusions have been drawn: 1. For the purpose of complete recovery of invested capital depreciation on current cost basis is demanded. 2. For the purpose of undertaking realistic profit computation and accounting to apply to comparison and analysis of business operation depreciation on current cost basis is required. 3. When the feasibility of depreciation on current cost basis is guaranteed' then depreciation on current cost basis can be promoted. 4. Depreciation on current cost basis should be studied from the standpoint of evaluation position.

• 한국소프트웨어감정평가학회 논문지
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• 제16권1호
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• pp.27-36
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• 2020

소프트웨어 개발비 감정은 프로그램 완성도 감정과 함께 소프트웨어 공학 방법론을 적용하고 있다. 특히 소프트웨어 비용산정 기법을 적극적으로 준용해왔다. 다수의 감정 사례에서 소프트웨어 개발비 감정을 위해 소프트웨어 비용산정에 기반을 두는 "SW사업 대가산정 가이드"를 참조하여 감정이 이루어져 왔으나, 이러한 방법은 본질적인 한계를 가진다. 개발비 감정을 위한 "SW사업 대가산정 가이드" 자체의 문제점과 함께 소프트웨어 규모 산정의 기본이 되는 기능점수가 가지는 단점으로 인해 감정의 정확성과 일관성이 유지되기 어렵다. 본 연구에서는 규모추정의 정확성과 일관성 유지를 위한 방안으로 유스케이스 기반의 규모 추정 방안을 제시한다. 평가 대상 프로젝트는 개발비 감정 사례들과 유사한 유형의 소프트웨어공학 교과목의 프로젝트로 진행하였으며, 공수 추정 시에 감정 사례들의 상황과 유사하도록 제공되는 문서와 정보를 최소화하였다. 기능 점수 기반의 기존 소프트웨어 개발비 산정 방식과 유스케이스 기반으로 제안한 방안의 성능 평가를 실시한 결과, 기존 방식보다 정확도가 향상되었고 통계적으로 유의함이 입증되었다.

• 한국지열·수열에너지학회논문집
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• 제9권2호
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• pp.25-31
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• 2013

It has become very important for unused energy to be used for building air conditioning. Economic evaluation on energy system by using river water as a heat source, which is one of the unused energy, was carried out. The floor area of the building and the distance between heat source equipment and river was assumed $50,000m^2$ and 200 m. General heat source system using absorption chiller-heater was used for comparing to the energy saving system, and payback period method using initial cost and running cost of two systems, was used to perform economic evaluation. According to development of high capacity of water source heat pump which is appropriate for using river water, initial cost for the system has been reduced. Payback period was about 3.2 years, and this period might be shortened if nation's economic support enact.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2002년도 학술.기술논문발표회
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• pp.103-109
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• 2002

This research is aiming to specify the requirement of the investment such as initial cost, running cost earning rate to make effective investment considering the purpose of remodeling and economical value of store building enough to meet the initial purpose of remodeling. The review of earning rate for economical evaluation was performed by the on-site auditing on the structure and function of the building and applying the assessment simulation program, which is to find the possible business model to identify the requirement of building owner through case study. After the research, the following results are obtained. First, it is important that many aspects should be carefully analysis and the best method should be selected as characteristics of remodeling can be defer each other in their implementations. Second, though the remodeling of exist buildings to promote the functions has been applied. no suitable assessment tool has bee developed for deciding the level of remodeling in the view of economical efficiency so far. Third, the economical benefit was evaluated by analysing annual earning rate which is applied by investment items and recovery period for the investment. More specific data bate should be established to apply the suggested economic accession in business enough to forecast the future circumstances. More researches should be promoted on this area continuously as well as the integrated economic evaluation of remodeling on existing building.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2004년도 추계학술대회 논문집 전력기술부문
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• pp.143-146
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• 2004

This paper presents a method to improve reliability by dispersed generation (DG) installation considering load types and interruption cost. The objective functions such as power losses cost, operation cost of DGS, power buy cost and interruption cost are minimized for reliability improvement and efficient operation. The several indices for reliability evaluation are improved by dispersed generation system installation.

• 한국지진공학회:학술대회논문집
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• 한국지진공학회 1999년도 춘계 학술발표회 논문집 Proceedings of EESK Conference-Spring
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• pp.178-185
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• 1999

Minimum life-cycle cost helps to evaluate cost effectiveness of base-isolated bridges under specific condition. Life-cycle cost mainly consists of the initial construction cost and the expected damage cost. Damage cost estimation needs proper model of input ground motion failure probability evaluation method and limit states definition. We model the input ground motion as spectral density function compatible with the response spectra defined at each seismicity and site condition. Spectrum analysis and crossing theory is suitable for reseating calculation of failure probabilities in the process of cost minimization. Limit states of base-isolated bridges re defined for superstructure isolator and pier respectively The method is applied to both base-isolated bridges and conventional bridges under the same conditions to investigate cost effectiveness of base isolation in low and moderate seismic region. the results show that base-isolation of bridges are more effective in low and moderate seismic region and that the site effects on the economical efficiency may not be negligible in such a region.

• 디지털융복합연구
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• 제10권8호
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• pp.91-96
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• 2012

본 연구의 목적은 공공서비스의 한 분야인 별정우체국의 원가산정 방법론에 대하여 고찰해 보고자 하는 것이다. 본 논문은 이러한 산정방법을 어떻게 적용할 것인가에 대한 방향을 설정하고자 하였다. 왜냐하면 이러한 기간산업을 육성하고 합리적인 방향으로 이끌어 가는데 있어서 올바른 원가산정은 매우 중요하기 때문이다. 바람직한 원가산정 방법으로는 별정우체국 1국마다 평당 임차료를 산정해서 별정우체국의 전체 임차료를 산정하고 별정우체국의 위치에 따라서 기준경비율, 표준감가상각비를 이용하여 인원별, 면적별 등으로 단위당 원가를 산정하여 총원가를 산정한 다음 이를 서비스별로 배분하면 적절한 원가가 산정될 것으로 판단된다.