• 환경영향평가
• /
• 제2권2호
• /
• pp.59-71
• /
• 1993

Evaluation methods are employed in environmental impact assessment to choose between different project site, to determine the required measures to compensate impact and to decide whether the environmental impacts are more important than the social or economic effects of a project. The main obstacles that restrict use of quantitative evaluation method are a Lack of knowledge about the environmental effects (e.g. if impacts on wildlife or landscape amenities are predicted) and the relative importance of economic and social issues compared with nature conservation stability of ecosystem or landscape beauty. In Germany, the most common method for site planning is the "ecological risk analysis". It is a kind of multi-criteria-decision-method based on quantitative and qualitative description and ordinal ranking. The various kinds of "ecological balancing methods" that are more recently developed (within the last decade) to quantify the required amount for compensatory measures instead often use cardinal figures to express the value of ecosystems, the intensity of impacts, the need for additional measures to compensate for long recuperative periods when restoring ecosystems and so on. There are still only a view attempts to quantify decisions between environmental and socio-economic issues. Multicriteria-analysis as well as cost-benifit-analysis was used. Some new approaches which are still in a preliminary status are based on contingent valuation and on calculations for compensatory payments (instead of compensatory measures).

• Journal of Computing Science and Engineering
• /
• 제2권3호
• /
• pp.274-300
• /
• 2008

Software testing cost can be reduced if the process of testing is automated. However, the test data generation task is still performed mostly by hand although numerous theoretical works have been proposed to automate the process of generating test data and even commercial test data generators appeared on the market. Despite prolific research reports, few attempts have been made to evaluate and characterize those techniques. Therefore, a lot of works have been proposed to automate the process of generating test data. However, there is no overall evaluation and comparison of these techniques. Evaluation and comparison of existing techniques are useful for choosing appropriate approaches for particular applications, and also provide insights into the strengths and weaknesses of current methods. This paper conducts experiments on four representative test data generation techniques and discusses the experimental results. The results of the experiments show that the genetic algorithm (GA)-based test data generation performs the best. However, there are still some weaknesses in the GA-based method. Therefore, we modify the standard GA-based method to cope with these weaknesses. The experiments are carried out to compare the standard GA-based method and two modified versions of the GA-based method.

• 대한토목학회논문집
• /
• 제29권5D호
• /
• pp.627-634
• /
• 2009

최근 국내에서 많이 시행되고 있는 BTL(Build Transfer Lease)사업은 수익성이 낮은 문화, 교육, 복지부문의 사회기반시설을 조기에 확충함으로써 국민들의 삶의 질을 높여주는 역할을 한다. 그러나 현재까지 BTL사업의 공사비는 초기공사비에 중점을 두고 있으며, 상대적으로 운영비 산정에 대한 합리적 기준이 정해져 있지 않아 비효율적인 낮은 운영비 관리체계가 되고 있다. 저가 운영비는 사업완공 후 시설 운영시 서비스의 질을 저하할 수 있고, 사업의 성과에도 큰 영향을 미친다. 따라서 본 연구에서는 기존 하수처리시설의 운영부문에 대한 실적자료를 이용하여 사업계획 초기에 운영비와 운영인력을 산정하는 방안을 제시한다. 이러한 연구는 향후 BTL사업으로 시행되는 하수처리시설의 계획시 시설 규모에 따른 개략적인 운영비 산정에 활용성을 갖을 것으로 기대되며, 타 시설물의 BTL사업 운영비 산정체계 구축시 참고 자료가 될 수 있다.

• 한국경영과학회:학술대회논문집
• /
• 대한산업공학회/한국경영과학회 1996년도 춘계공동학술대회논문집; 공군사관학교, 청주; 26-27 Apr. 1996
• /
• pp.570-573
• /
• 1996

The evaluation test for the operation of rotary type surface mounters which consist of the reel axis, the index table and the X-Y table, has been performed by comparing the new method with the old one in only fields. Because the problem seeking for the optimal operation of rotary type surface mounters, is NP complete, it is almost impossible to get the optimal solutions of large problems. This paper deals with a dynamic network modeling, which can reduce the effort, the cost, and the time used for the performance test of rotary type surface mounters.

• 한국소음진동공학회:학술대회논문집
• /
• 한국소음진동공학회 2003년도 추계학술대회논문집
• /
• pp.330-332
• /
• 2003

In this paper, It is introduced new sound quality method, FI(Fluctuation Index) and the example applied Outdoors side Air-conditioner noise evaluation. Because FI is applied with very simple algebraic calculation algorithm, it can be applied some other application without spending high time and cost.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2004년도 추계학술대회 논문집
• /
• pp.710-715
• /
• 2004

To evaluate the fatigue lifetime of structures, it is necessary to identify the value of parameters through tests or literature. it is difficult for field engineers to get the necessary data through tests from the viewpoint of time and cost. In this study. we surveyed literature and proposed a procedure to identify the fatigue parameters for fatigue life evaluation by local strain approach.

• 신재생에너지
• /
• 제10권3호
• /
• pp.47-54
• /
• 2014

Recently, BESS is considered as one of essential countermeasure for demand side management. However, an economic evaluation is critical issue for the introduction of power system because the cost of BESS is very high in present stage. Therefor, this paper presents economic evaluation method for customer use case by considering peak shaving function based on the real time price. From the case study on the model power system and educational customer, it is confirmed that the proposed method is a practical tool for the economic analysis of BESS. and analytical approach for the reliability assessment in radially operated distribution systems. The approach can estimate the expected reliability performance of distribution systems by a direct assessment of the configuration of the systems using the reliability indexes such as NDP (Non-Delivery Power) and NDE (Non-Delivery Energy). The indexes can only consider the number and configuration of the load, but can not consider the characteristics of the load which is the one of the most important factor in the investment cost for the distribution systems. Therefore, this paper presents the new performance indexes for the investment of the distribution facilities considering both the expected interruption cost for the load section and the operation characteristics of Energy Storage System. The results from a case study show that the proposed methods can be a practical tool for the reliability management in distribution systems including Energy Storage System.

• 대한환경공학회지
• /
• 제32권1호
• /
• pp.97-104
• /
• 2010

현재 강화된 방류수 수질 기준에 발맞춰 질소 인 제거를 포함한 고도처리 공정을 건설 중이거나 기존 표준활성슬러지 공정에서 고도처리공정으로의 개선이 추진되어지고 있다. 그러나 다양한 고도처리공정의 적용을 검토함에 있어 제거 효율 측면에서의 단순 평가만이 사용되고 있다. 따라서 고도처리공정 적용 시 제거 효율 뿐 아니라 슬러지 생산, 포기 비용 등을 복합적으로 평가할 수 있는 방법이 필요하였다. 따라서 본 연구에서는 표준활성슬러지 공정으로 운영 중인 S 하수처리장을 Biological nutrient removal(BNR) 공정으로 개선할 경우를 가정한 대안 공정 평가 방법을 제안하였다. 시간적, 비용적 장점을 가지며 객관적인 평가 기준으로 대두되고 있는 수학적 모델을 이용한 시뮬레이션을 통해 대안 공정으로 선정된 Anaerobic/anoxic/oxic ($A^2$/O), Virginia initiative plant (VIP), Daewoo nutrient removal (DNR) 공정에 대해 평가하였다. 시뮬레이션 결과를 바탕으로 공정의 처리 성능 뿐 아니라 슬러지 생산량 및 에너지 효율을 포함한 5가지 성능 지수들을 적용함으로써 개별 항목간의 비교 평가가 가능하였으며, 최적 공정을 제시하기 위한 객관적 판단과정을 퍼지 추론을 통하여 구현하였다.

• 경영과학
• /
• 제17권3호
• /
• pp.97-118
• /
• 2000

This paper proposes an evaluation model for internet shopping mall business by defining its characteristics and evaluation criteria. We analyzed the characteristics of internet shopping mall business environments and classified the business into four major categories. We derived the evaluation criteria which can evaluated all categories comprehensively. The proposed criteria are cost, netizen, technology, transaction, and marketing, each of which gives a significant impact on the business profitability. Based on these criteria, a quantitative evaluation method was developed. We also proposed a penta-classification scheme which can be used to identify the overall characteristics shape of each internet shopping mall business site. An actual application of our evaluation model was illustrated in order to show that our proposed model may be used in the real business sites.

• 대한안전경영과학회:학술대회논문집
• /
• 대한안전경영과학회 2008년도 춘계학술대회
• /
• pp.47-51
• /
• 2008

Recently, the development of technology has been rapidly proceeding with information technology in various fields. Due to their abstract properties, proper evaluation of intangible assets is very difficult compared to evaluation of tangible assets. Intangible assets are knowledge, technology, and design etc. In general there are two approaches to evaluate the intangible assets such as qualitative and quantitative approach. The qualitative approach contains scoring approach, profile approach, checklist approach, and quantitative approach. Quantitative approach contains cost approach, market approach, income approach, and real-option approach. As an initial step for evaluation of safe work environments, this study compares and analyzes evaluation methods of intangible assets.