• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2009년도 추계학술대회 논문집
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• pp.301-301
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• 2009

The General program evaluation guide is intended for use by managers of both deployment and R&D programs within the U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy (EERE), although most of the examples of evaluations pertain to deployment programs(EERE,2006). It could help managers determine what kinds of timely adjustments may be needed in program design or implementation to improve the rate or quality of achievement relative to the committed resources. To consider the adaptation of the method in Korea, we have studied the evaluation case for solar america initiative using cost-benefit evaluation. The President's Solar America Initiative (SAI) was launched in January 2006 as part of the administration's Advanced Energy Initiative. The SAI has a goal of installing 5-10 GW of photovoltaic (PV) systems in the U.S. by 2015 and 70-100 GW of PV systems in the U.S. by 2030. The evaluation report presents estimates of the potential benefits should the SAI PV installation goals be achieved. For this analysis, the areas researched include energy, economic, and environmental benefits. As a result, research suggests that 500 MW of PV may have been enough to avoid lackout. The ability of PV to prevent specific blackouts will depend on very specific information on where the PV installations are installed and their ability to relieve pressure on the high stress points on the grid. While this level of detail is outside the scope of this study, it appears that there will be some potential benefit for blackout prevention should the SAI PV goals be achieved.

• 한국항만경제학회지
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• 제26권3호
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• pp.165-174
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• 2010

본 논문의 DMU는 9개 지역(부산, 경북, 인천, 경기, 전남, 경남, 전북, 울산)이며, 이 지역들의 경제활동인구, 총고정자본형성, 항만수출액을 투입요소로, 총부가가치액을 산출물로 선정하였다. 그리고 본 논문에서는 항만수출액을 포함하지 않은 경우와 항만수출액을 포함한 경우의 효율성과 생산성을 비교 분석하였다. 분석결과를 요약하면 다음과 같다. 첫째, 항만수출액을 포함시킨 경우가 그렇지 않은 경우에 비해 효율성이 증가하였다. 그룹 2의 경우는 그룹 1에 비해 초효율성 값이 커졌으나 2000년 이래로 꾸준히 그 값이 작아지고 있다. 이것은 효율성을 100% 유지하기 위해서 투입요소를 거의 늘일 여유가 없게 된 것을 의미한다. 둘째, 그룹1에서 생산성 지수가 1를 하회한 지역은 경남과 전북으로 나타났다. 그룹2에서 생산성 지수가 1를 상회한 지역은 부산, 경북, 충남으로 나타났다. 셋째, 그룹1에서 LDP로 측정해 보면 인천이 9년간 효율성의 변화가 가장 작았고, 충남의 경우가 효율성의 변화가 가장 큰 것으로 나타났다. 반면에 그룹2에서 LDP로 보았을 때는 충남이 9년간 효율성의 변화가 가장 작았고, 전남의 경우가 효율성의 변화가 가장 큰 것으로 나타났다.

• 자원환경지질
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• 제57권3호
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• pp.319-327
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• 2024

탄산염광물인 방해석과 아라고나이트는 화학식 CaCO₃인 동질이상광물이다. 본 연구에서 사용된 pH 상승용 중화제는 자연산 석회암과 아라고나이트, 방해석으로 구성된 가리비(scallop)와 아라고나이트로 구성된 바지락(clam) 패각이다. 실험에 사용한 인공산성배수의 중금속은 Cd, Cu, Fe, Mn, Zn이다. 실험결과에 의하면, pH상승 효과는 방해석과 아라고나트계열 모두 자연산 광석보다 패각이 더 높다. Cd 제거에 가장 적당한 매질은 자연산 방해석과 가리비(방해석)이며 Cu와 Fe는 4개 시료 모두 95% 이상의 높은 효율을 나타내었다. Zn은 아라고나이트와 바지락(아라고나이트)이 효율이 높으며, Mn은 4개의 매질 모두 50% 이하로 낮다. 중금속 제거 효율은 Mn을 제외하고 90% 이상이며 Fe > Cu > Cd > Zn > Mn 순이다.

• 한국태양에너지학회 논문집
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• 제28권6호
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• pp.70-77
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• 2008

The purpose of this study evaluates a feasibility and economical efficiency of new renewable energy. According as weather change is serious problem now days, every people make attention to the reduction of greenhouse gas. The revitalization of new renewable energy creates the variety of energy source, stability of energy supply and reduction of greenhouse gas. In this study evaluates a feasibility and economical efficiency from new renewable energy of various photo voltaics, wind power, small hydro and biogas. Feasibility does in standard of technical characteristic, politic support, marketability, establishment present condition and development aim. Economical efficiency does in standard of developmental unit cost, utilization factor, equipment life, politic support cost, interest ratio. The results of this study were as follows photo voltaics, wind, small hydropower, biogas in order feasibility is high. Developmental unit cost, utilization factor, equipment life, politic support cost and analyzed the relationship of interest ratio fluctuation and economical efficiency. From all new renewable energy the utilization factor most is important in economical efficiency but necessary utilization factor is difficult because environmental problem.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2003년도 춘계학술대회 논문집
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• pp.105-110
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• 2003

The hydraulic excavator has been a popular research object for automation because of its multi-workings and economic efficiency. When it works crane tasks, most of disasters happen. The objective of this paper is to design each components and to construct boom, arm, bucket circuit. These models modeled with AMESim show us change of variables and behavior of excavator. Simulation model will be used for simulator of excavator.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2004년도 하계학술발표 논문집
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• pp.218-218
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• 2004

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2010년도 춘계 학술논문 발표대회 1부
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• pp.213-216
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• 2010

Nowadays BIM(Building Information System) is applied to the public construction delivery system. BIM can help communications between project applicants through the extraction of the exact and prompt information. It also increases the efficiency of planning, construction, economic feasibility and maintenance in the whole project. Due to increasing demands of BIM, project evaluation and its process on the final deliverables have been in major interests. Thus, through the analysis of the current BIM project, characteristics, types and applications have been researched. We have discussed completeness, relationship and planning of BIM data, which are the standards of evaluation.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2008년도 춘계 학술논문 발표대회
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• pp.111-115
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• 2008

The productivity is the one of the primary elements to evaluate the new systems performance for building construction along with the economic efficiency, the safety, and the quality improvement. At present the on-site construction automation systems(we will call it as Construction Factory or CF hereafter) is under the development by research group for construction automation of high-rise building. The system includes many sub-systems such as a robotic crane, a construction factory, bolting robots, a building material management system using RFID and so on. In this study we discuss and propose the method to evaluate for these hybrid on-site automation system fundamentally. In future we devise a framework of evaluation modules for the on-site building automation system on the basis of this discuss.

• Journal of Electrical Engineering and Technology
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• 제3권1호
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• pp.52-59
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• 2008

This paper describes the secant method for solving the economic dispatch (ED) problem with generator constraints and transmission losses. The ED problem is an important optimization problem in the economic operation of a power system. The proposed algorithm involves selection of minimum and maximum incremental costs (lambda values) and then the evaluation of optimal lambda at required power demand is done by secant method. The proposed algorithm has been tested on a power system having 6, 15, and 40 generating units. Studies have been made on the proposed method to solve the ED problem by taking 120 and 200 units with generator constraints. Simulation results of the proposed approach were compared in terms of solution quality, convergence characteristics, and computation efficiency with conventional methods such as lambda iterative method, heuristic methods such as genetic algorithm, and meta-heuristic methods like particle swarm optimization. It is observed from different case studies that the proposed method provides qualitative solutions with less computational time compared to various methods available in the literature.

• 간호행정학회지
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• 제16권3호
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• pp.295-305
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• 2010

Purpose: This study was conducted to evaluate the economic efficiency of a community-based nursing care center to help policy makers determine whether or not to invest in similar facilities. Methods: The subjects were 101 elderly people over 65 years who participated in a health management program from February 1 to July 31, 2007. Direct cost was estimated with center operations cost, medical cost for out-patients and pharmacy cost. Indirect cost was measured by transportation cost. Direct benefit was calculated by saved medical cost for out-patients, saved pharmacy cost, saved transportation cost, and reducing hospital charges. Indirect benefit was estimated with prevention of severe complications. Economic efficiency was evaluated by cost-benefit ratio and net benefit. Results: Operating a community-based nursing care center was found to be cost-effective. Specifically, the cost of operating the center evaluated here was estimated at 135 million won while the benefit was estimated at 187 million won. Benefit-cost ratio was 1.38. Conclusion: The Community-based nursing care center that was described here could be a useful health care delivery system for reducing medical expenditures.