• Journal of Preventive Medicine and Public Health
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• 제37권4호
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• pp.353-358
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• 2004

Objective : To determine the quality of life and cost consequences for deaf adults who received a cochlear implant. Methods : The data from 11 patients, post-lingual deaf adults who received cochlear implants from 1990 to 2002, underwent cost-utility analysis. The average age of the participants was 49.6 years. The main outcomes were direct cost per quality-adjusted life-year (QALY) using the visual analog scale (VAS), health utility index (HUI), EuroQol (EQ-5D), and quality well-being (QWB), with costs and utilities being discounted 3% annually. Results : Recipients had an average of 5.6 years of implant use. Mean VAS scores increased by 0.33, from 0.27 before implantation to 0.60 at survey. HUI scores increased by 0.36, from 0.29 to 0.65, EQ-5D scores increased by 0.26, from 0.52 to 0.78, and QWB scores increased by 0.16, from 0.45 to 0.61. Discounted direct costs were $22,320, yielding $19,223/QALY using VAS, $17,387/QALY using HUI, $24,604/QALY using EQ-5D, and $40,474/QALY using QWB. Cost-utility ratios using VAS, HUI, and EQ-5D were all below $25,000 per QALY, except using QWB. Conclusion : Cochlear implants in post-lingual deaf adult have a positive effect on quality of life at reasonable direct costs and appear to produce a net saving to society.

• 한국산학기술학회논문지
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• 제17권1호
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• pp.274-283
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• 2016

본 논문은 복잡해지는 군수분야에서 효율적이고 효과적인 예방정비업무 할당을 위해 Hard Time업무의 최적 주기산정 및 이를 통한 경제적 효용성을 분석하는데 연구 목적이 있다. 본 연구는 기존 연구에서 제시하는 예방정비 주기 선정방법의 한계점을 분석하였다. 또한 일반적인 Wearout 고장 특성을 설명하는 와이블 수명분포에서 다양한 형상모수 조건과 예방정비비용과 고장정비비용 조건을 가정한 시뮬레이션을 통해 가상의 시스템에 대한 정비활동을 모의하여 총 정비비용의 추의를 분석하였다.

• 수산경영론집
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• 제46권1호
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• pp.63-74
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• 2015

Due to red tide and abnormal currents that take place every year, the damage of inland fish farms that takes sea water is increasing frequently. Also, the households of inland fish farm due to the increase in the cost of fuel and electricity are struggling many hardships economically. In relation to underground seawater for it's farm analyzed economic effect based on the actual conditions for 1,700 inland fish farms, from this I have deduced policy implications for direction this project to be pursued from now on. The saving rate of costs of the fuel and electricity through the development of an underground seawater were approximately analyzed to decline about 3.4~9.7%, if utilizing only about 5% of the undeveloped farms, it was estimated effect of about 61 billion won, if 10%, it was estimated effect of about 122 billion won. Consideration in selecting the developer of underground seawater will be selected an character of farm method. It is expected this study will be helpful for business analysis related government in the fisheries.

• 자원리싸이클링
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• 제32권3호
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• pp.45-56
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• 2023

본 연구에서는 비촉매분야에서 사용된 로듐의 재자원화 시, 경제적 및 환경적 효과를 분석하였다. 분석방법으로, 경제적 효과 분석은 비용편익분석과 자원절감효과분석을 적용하였으며, 환경적 효과 분석은 전과정평가를 적용하였다. 연구결과, 경제적 측면에서 B/C 값은 1.28로 사업성이 있는 것으로 나타났으며, 비용절감은 재자원화 로듐 1 g 기준으로 237,000원로 나타나 2025년 로듐 재자원화량 71.7억원으로 나타났다. 환경적 효과는 로듐 1 kg 기준의 재자원화 시와 해외매각 시에 대해 온실가스 배출량을 비교하였다. 산정 결과, 로듐 1 kg 기준으로 재자원화 시 온실가스 배출량은 65 kg CO₂eq./kg-Rh, 해외매각 시 28,800 kg CO₂eq.으로 나타나, 99.8%가 저감되었다. 본 연구결과는 비촉매분야에서 사용되는 로듐의 재자원화 시 경제적 및 환경적 효과 분석을 통해 자원이 부족한 우리나라에서 로듐 재자원화가 필요하다는 것을 제시할 수 있었다.

• 한국산림과학회지
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• 제95권3호
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• pp.268-273
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• 2006

이 연구는 국내 제재 산업에서 생산요소의 가격변화가 기술변화에 어떻게 영향을 미쳤는지 알아보기 위한 연구다. 이론적 모델로는 초월대수 비용함수(Translog Cost Function)를 이용하였으며 1970년부터 2003년까지 시계열 자료를 이용한 계량경제분석을 통해 생산요소 가격의 변화가 한국의 제재 산업의 기술적 특성에 어떠한 영향을 미쳤는지 추정하였다. 추정결과에서 국내 제재산업은 생산구조에서 노동, 자본이 서로에 대해 대체 관계를 가지고 있고, 특히 자본재가 노동력을 대체하는 수단으로 보다 탄력적으로 변화되었다. 또한, 노동가격의 상승으로 인해 국내제재산업은 노동절약적, 자본사용적, 원목사용적 기술로 발전하여 왔다. 현재 국내제재산업에는 규모의 경제(Economy of scale)가 여전히 작용하고 있고, 자본 투자를 통한 규모증대는 단위생산 비용을 절감하고 생산성을 향상시킬 수 있을 것이다.

• 한국도로학회논문집
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• 제19권2호
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• pp.143-152
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• 2017

PURPOSES : This study intends to estimate the tangible benefits derived from the integration of operations of an Express Intercity Bus Terminal and a Highway Service Area. METHODS: For the study, a highway service area was chosen to function as a bus terminal, integrating its services with that of a nearby bus terminal plagued by operating losses. The exercise also helped improve mobility owing to the introduction of local buses between the terminals and utilization of the existing infrastructure such as rest areas. Thus, a terminal that was not being utilized for its intended functionality was integrated with an existing facility to improve the utilization of both and subsequently aid local development. The impact of the exercise was then measured by evaluating the variation in utilization efficiency, operating costs, travel time between two regions (Seoul-Jeomchon and Seoul-Geumsan), and the social costs before and after the integration of the two facilities. RESULTS :The impact of the integration was an increase in utilization efficiency, a decrease in operating cost, a decrease in travel time, and a decrease in social cost in both the regions. The benefits of improved utilization and cost saving can be passed on to the citizens in the form of discounts. A local power generation facility will eventually replace the bus terminal, which can revitalize the local economy. CONCLUSIONS :The integration of the highway service area with the bus terminal is expected to have a win-win effect on the passengers as well as the operators. The study also proposes a sustainable strategic plan for existing terminals and rest areas to implement a method to compete with KTX transportation.

• 한국유기농업학회지
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• 제20권3호
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• pp.267-282
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• 2012

In this study, RPS system, one of the renewable energy support systems, is utilized for economic analysis of solar generation equipment and the fuel cost savings plan for controlled horticulture farms with high fuel-cost dependency and facility applicability were evaluated. On the exterior of the upper layer of glass greenhouse (9917$m^2$) of controlled horticulture farms using bunker C oil, half of the area (4958$m^2$) was utilized for theoretical installation and operation of 450kW-level solar power generator, and as the result, first, the effect of investment cost only of solar generation system was found to be quite excellent, but it was analyzed that there were limits to saving the fuel costs of the controlled horticulture farms. Second, when geothermal system was first introduced in the farm and solar system was additionally introduced, it was analyzed that the effect of introducing solar system was excellent. In order to apply such effects to the sites of farming, partial supplementation of RPS system which is being uniformly applied regardless of the purpose of renewable energy is necessary. When the subject of use directly install facilities where it is directly connected to national added-value such as food security created by the farming industry, it is necessary to introduce appropriate system that corresponds to such. Moreover, it was studied that the quick development of demonstrative complex that can practically evaluate the applicability of renewable energy in farming industry and interest and preparation of related institutions in financial support structure for its site application would lead to success.

• Journal of Electrical Engineering and Technology
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• 제8권5호
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• pp.1070-1077
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• 2013

Owing to the consistent increase in energy efficiency issues, studies for improving regenerative energy utilization have been receiving attention in the Urban DC railway systems, where currently, the utilization of regenerative energy is low due to the lack of a specific plan for using this energy. The regenerative energy in railway systems has a low efficiency problem which results in the increase of the catenary voltage and a possibility to create problems to the electrical devices connected to the system. This paper deals with the power integration of large urban railway subsystems to improve regenerative energy utilization where the railway subsystems are integrated with other railway subsystems to improve the energy efficiency. Through the case studies, to find the realistic effect of integrated operation, the Seoul Metro subsystems, namely Line 5 and Line 7, has been applied. Also, evaluation for the electricity cost saving has been performed by using KEPCO electricity cost table.

• The Journal of Asian Finance, Economics and Business
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• 제5권2호
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• pp.105-118
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• 2018

Generic medicine (GM), which is an alternative drug product for branded medicine (BM), is used less in Japan than in other OECD countries. Therefore, we investigate why the medical consumers of Japan avoid the use of GMs even though the efficacy and safety of the medicines have already been proven. We theorize that effectiveness or risk of GMs are related to the consumer attitude toward GMs is affected by the behavioral approach/activation system (BAS) which promotes actions to reach the desired state, and the behavioral inhibition system (BIS) which suppresses behaviors to avoid negative outcomes. To see which of the BAS and BIS dimensions are related to GM usage, we surveyed 374 Japanese consumers and found that Quality, Efficacy, Safety, & Cost-effectiveness with the BAS, and Functional Risk, Financial Risk, Social Risk, Physical Risk, Psychological Risk, & Time Risk with the BIS had a significant effect on consumer attitude to GMs. These results are important in that they 1), confirm the role of BAS/BIS in attitudes to GMs, 2), provide guidelines when marketing GMs, 3), help governments promote the use of GMs as a cost-saving measure, and 4), guide future surveys regarding consumer attitudes to GMs.

• 상하수도학회지
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• 제23권5호
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• pp.647-654
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• 2009

Since the end of the 1990s, sewer pipe improvement works have been going on: most septic tanks have been thrown away and discarded. These discarded septic tanks amounts up to 370,000 based on the project plan 2005-2008: it is a serious squander of nation's resources, a contaminating means that buries toxins under soil, and a cause of a expensive waste. Research on recycling of discarded septic tank as a new resource is in urgent need. This research suggests plans to recycle discarded septic tank as a rainwater management facility, solutions to water cycle recovery in the limelight, and economic analysis of the plan. In the case of a recycling discarded septic tank as a rainwater management facility will socially benefit to support economical adequacy, discard cost saving of septic tank and water supply and sewage cost reduction will come out. Consequently a rainwater management facility converted from a discarded septic tank leads to decentralization of the rainwater management system, which anticipates a positive effect on recovery of urban water cycle.