• 기술혁신학회지
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• 제16권1호
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• pp.20-40
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• 2013

우리나라 정부는 해양 오염원의 관리와 해양생태계 개선을 위해 해양환경 위해성 평가 및 관리기술 개발사업을 추진 중이다. 그러나 이 사업에는 막대한 예산이 소요되므로, 본 기술의 편익을 정량적으로 분석한 후 사업의 경제적 타당성 여부를 평가해야 한다. 이에 본 연구는 CVM을 활용하여 엄밀한 경제이론에 근거하여 해양환경 위해성 평가 및 관리 기술의 편익을 정량적으로 규명하고자 하였다. 분석결과 해양환경 위해성 평가 및 관리 기술을 위한 연간 가구당 평균 지불의사액은 2,663원으로 나타났다. 이를 전국의 전체 가구로 환산하여 경제적 총편익을 구한 값은 연간 462.82억원이었다. 이 값을 활용하여 해양환경 위해성 평가 및 관리 기술의 경제성 분석을 하였더니 비용편익비율의 하한값이 1.76으로 1을 초과하여 본 사업은 경제적으로 타당성이 존재한다고 판단되었다.

• 한국문헌정보학회지
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• 제43권4호
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• pp.117-137
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• 2009

본 연구는 도서관의 경제적 가치를 실증적으로 측정한 국내 외 42개의 선행연구들을 수집 정리하고, 상이하게 나타난 투자수익률이나 비용편익비율을 어떻게 해석해야 하는지를 메타분석을 통해서 통계적인 방법으로 파악하고자 한다. 메타분석법은 도서관의 경제적 가치측정 연구들이 제시한 수치를 통계적인 방법으로 분석하여 그 결과를 객관적으로 종합하기 위하여 적용되었다. 선행연구를 토대로 6개의 변인(조사시점, 도서관 유형, 연구방법, 혜택범위, 서비스범위, 1인당 GDP)을 도출하였고, 이들을 대상으로 6개의 가설을 설정하였다. 메타 회귀분석 결과, 혜택의 범위(직접효과, 간접효과) 및 국민 1인당 GDP의 수준에 따라 투자수익률의 일관성 있는 예측이 가능하다는 결과가 나타났다. 본 연구는 도서관의 경제적 가치 분야에서 수행된 국내 최초의 메타분석으로서, 이 분야의 연구에서 도출된 결과를 정책결정에 적용하는 데 도움이 될 것으로 기대된다.

• 자원리싸이클링
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• 제31권3호
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• pp.40-52
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• 2022

탄소광물화 기술은 석탄재와 이산화탄소를 반응시켜 건설재료 등으로 활용이 가능한 복합탄산염 등의 부산물을 생산함과 동시에 이산화탄소를 탄산염에 고정화하여 온실가스 감축효과를 얻을 수 있는 기술로, 이산화탄소 감축 및 경제적 잠재력을 고려하면 국가 온실가스 감축 목표를 실현하기 위한 유용한 방안이 될 수 있다. 그러나 아직까지는 해당 기술의 이산화탄소 감축 성능과 환경적인 이점, 경제성 등에 대한 자료가 적어서 기술의 상용화 가능성에 대해서는 명확하지 않은 상태이다. 본 연구는 국내 순환유동층 발전소에서 발생되는 이산화탄소와 석탄재를 이용하는 이산화탄소 투입량 기준 6,000 tonCO₂/년 규모의 탄소광물화 설비에 대해 이산화탄소 감축량 및 경제성 분석을 수행했다. 공정 분석 결과 1톤의 복합탄산염 생산 시 실질적인 이산화탄소 감축량은 약 45.8 kgCO₂eq, 연간 약 805.3 tonCO₂로 산정되었으며, 경제적 편익 분석 시 비용편익분석비(B/C Ratio)는 1.04, 내부수익률(IRR)은 10.65 %, 순현재가치(NPV)는 24,713,465 원으로 나타나, 탄소광물화 설비가 어느 정도 경제성을 확보하고 있는 것으로 분석되었다.

• 수산경영론집
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• 제41권1호
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• pp.113-128
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• 2010

This study is aimed to analyze the economic feasibility of the selective breeding program on the Oliver flounder aquaculture. First of all, in order to evaluate this program, we review the concept and research trend on the selective breeding. The objective of this research is the selective breeding program on the Oliver flounder aquaculture in the Genetics and Breeding Research Center, NFRDI. It was conducted to investigated economic effects of three factors of the selective breeding program on the Oliver flounder aquaculture such as fast growth, disease resistance and increase exports. The results of economic analysis of the selective breeding program on the Oliver flounder aquaculture are as follows; First, there were the significant meaning of the economic effects on the technology of the selective breeding program by fast growth, disease resistance and increase exports. Second, we analyzed in the economic feasibility of the selective breeding program on the Oliver flounder aquaculture from 2004 to 2020, internal rate of return(IRR) was 419%, a benefit-cost ratio was shown to be 24.92, net present value(NPV) was 989,942,464 thousand won, which indicates the economic feasibility of the selective breeding program is very high. Finally, in order to improve the economic feasibility, there is need to be focused on the efficient the selective breeding program on the Oliver flounder aquaculture.

• 농업과학연구
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• 제30권1호
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• pp.89-101
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• 2003

For the pre-feasibility study and project evaluation, the discount rate or cutoff rate should be given by the government authority. To get the Benefit/Cost Ratio, NPV(Net Present Value) and IRR(Internal Rate of Return) of the public investment projects, the pertinent and realistic discount rate should be determined to be suitable to the present time period. The cut-off rates in Korea were equivalent to 15% in 1970's, 10% in 1980's and 8% in 1990's. The prevailing rate of discount as 8% is considered not to be suitable for the 2000's public project appraisal considering the present interest rates on deposit and national bonds. To determine the socio-economic feasibility of the public projects, the IRR should be bigger than the present cutoff rate. When we still use the high old rate of discount, the analytical results of project appraisal will show always economically unfeasible. Therefore the new rate of discount suitable for present time should be determined by the government. The public projects to be implemented in 2000 year onward are recommended to be adapted 5% of cutoff rate for the project appraisal and evaluation according to the results of reviewing the tendency of discount rates and market rates of interest in Korea.

• International Journal of Industrial Entomology and Biomaterials
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• 제2권1호
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• pp.75-78
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• 2001

The whitefly, Dialeuropora decempuncta Quaintance and Baker (Homoptera : Aleyrodidae) causing considerable damage to mulberry, Morus alba. Crop loss caused by the whitefly was estimated in mulberry. Quantitative yield loss was estimated on the basis of harvest data from both sprayed and unsprayed plots. Data on pest incidence has been recorded at weekly intervals in both sprayed and unsprayed plots from 30 th day of plant age till harvesting i.e., 60 days after pruning in August October season. An attempt has been made to establish a relationship between whitefly population and percentage of crop loss due to it. Percentage of crop loss due to whitefly has got a linear relationship with the whitefly population. An initial population of 24 adults/top leaf would be able to cause 24% loss (l,630 Kg leaf/ha ) in a period of 30 days. Economic analysis postulates that application of pesticide can stove a net amount of 1,630 Kg leaf/ha which is sufficient to produce 67.65 Kg of additional multivoltine cocoons. This determines the cost/benefit ratio which will enable to workout the economics of management practices.

• 한국IT서비스학회지
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• 제17권2호
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• pp.69-81
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• 2018

This study performed an economic analysis and tested the viability of a public computerization project to create a comprehensive information system for public e-procurement for small and medium-sized businesses (SMBs). The study found that the estimated costs of the project included 4.3 billion won to build the system and 710 million won per year to maintain the system once it is built. The project's estimated total benefits amounted to 6.66 billion won per year, including 5.871 billion won per year in increased convenience for SMBs that use the system, 406 million won per year in benefits for public institutions, and 383 million won per year in benefits for the institution "A" to adopt the system. We used the contingent valuation method (CVM) to estimate the benefits to SMBs, which would be the main participants of the project. The survey found that the SMBs were willing to pay an average fee of 170,136 won. we conducted an economic analysis by applying a 5.5% social discount rate over an analysis period of 10 years and found a benefit-cost ratio of 5.02 and a net present value of 40.201 billion won, which indicated a very high economic viability of the project. The results of this study can be an important reference when deciding whether to pursue computerization projects in the public sector.

• 한국의학물리학회:학술대회논문집
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• 한국의학물리학회 2002년도 Proceedings
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• pp.305-308
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• 2002

More complex radiotherapy techniques using multi leaf collimation(MLC) such as intensity-modulated radiation therapy(IMRT) has been increasing the significance of verification of leaf position and motion. Due to the reliability and robustness, quality assurance(QA) of MLC is usually performed with portal films. However, the advantage of ease of use and capability of providing digital data of electronic portal imaging devices(EPIDs) have attracted many attentions as alternatives of films for routine quality assurance in spite of the concerns about their clinical feasibility, efficacy, and the cost to benefit ratio. In our work, the method of routine QA of MLC using electronic portal imaging(EPI) was developed. The verification of availability of EPI images for routine QA was performed by comparison with those of the portal films which were simultaneously obtained when radiation was delivered and known prescription input to MLC controller. Specially designed test patterns of dynamic MLC were applied to image acquisition. Quantitative off-line analysis using edge detection algorithm enhanced the verification procedure in addition to on-line qualitative visual assessment. In conclusion, the EPI is available enough for routine QA with the accuracy of portal films.

• 전기학회논문지
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• 제61권6호
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• pp.797-803
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• 2012

In this paper, for minimizing the real-time operating load losses of the power transformer, a SCADA optimum operating system was developed, and the economic analyses on the test operation were performed. Transformer loss DB which reflects the economic integration operation criteria was constructed by referring the transformer manufacturer's loss data(iron loss, copper loss). Based on the loss DB, each substation transformer real-time loss was calculated according to the size of the transformer loads, and if integration or separation transformer operating conditions minimizing the loss are met, then a window pops-up and the dispatcher performs the substation equipments operation according to the procedure provided by this system. With the existing SCADA main program, the relation database of the substation facilities and integration/separation operation algorithm were developed and applied to Auto MTR Processor and pconn Processor Task module. Seven stations test data for seven months were analyzed for the economic analyses, and the results showed that Cost-Benefit ratio was 2.64, and IRR(Internal Rate of Return), 36%, which asserted the economic justification of the proposed system.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2010년도 제39회 하계학술대회 초록집
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• pp.207-207
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• 2010

Both ZnO and GaN have excellent physical properties in optoelectronic devices such as blue light emitting diode (LED), blue laser diode (LD), and ultra-violet (UV) detector. The ZnO/GaN heterostructure, which has a potential to achieve the cost efficient LED technology, has been fabricated by using radio frequency (RF) sputtering, pyrolysis, metal organic chemical vapor deposition (MOCVD), direct current (DC) arc plasmatron, and pulsed laser deposition (PLD) methods. Among them, the PLD system has a benefit to control the composition ratio of the grown film from the mixture target. A 500-nm-thick ZnO film was grown by PLD technique on c-plane GaN/sapphire substrates. The post annealing process was executed at some varied temperature between from $300^{\circ}C$ to $900^{\circ}C$. The morphology and crystal structural properties obtained by using atomic force microscope (AFM) and x-ray diffraction (XRD) showed that the crystal quality of ZnO thin films can be improved as increasing the annealing temperature. We will discuss the post-treatment effect on film quality (uniformity and reliability) of ZnO/GaN heterostructures.