• 대한치과기공학회지
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• 제38권4호
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• pp.327-342
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• 2016

Purpose: The purpose of this study was to investigate the cognition of denture fabrication activities and its cost in National Health Insurance for elderly denture. Methods: A self-administered questionnaire was completed by 41 dental laboratories' owner who was research subjects of HIRA(Health Insurance Review & Assessment Service)'s policy research for elderly denture in 2011. The questionnaire consisted of general characteristics of the subjects, dental technicians' knowledge of national health insurance coverage of elderly denture, job-related changes after national health insurance coverage of elderly denture including validity of denture fabrication activity classification and the cost for each service. Each question was measured by Likert 5 point scale or frequency. The collected data were analyzed by SPSS 16.0. Results: Most of the research subjects had been fabricating national health insurance coverage denture(92.7%), also had ample knowledge of national health insurance coverage denture for elderly. Job-related changes after national health insurance coverage of elderly denture revealed marginal differences in the quality. The validity of fabrication activity classification of resin based complete denture was $3.71{\pm}1.023$ by Likert 5 point scale. Conclusion: The goal of national health insurance for elderly denture is to promote elderly's health and well-being. To fabricate denture is a very important part of the denture treatment. For this reason, denture fabrication activity classification and the cost analysis plan should be duly reflected in the policy of national health insurance for elderly denture.

• 경영과학
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• 제33권4호
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• pp.17-31
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• 2016

Waste sector has been a target of abatement policies by the most governments, even though its greenhouse gas (GHG) emission is not so high, since it is related to almost of other sectors. This study propose new GHG calculation equations which resolves logical contradiction of IPCC GL (Intergovernmental Panel on Climate Change Guideline) equations by including waste-to-energy effects. According to two GHG calculation equations, GHG emission inventory and BAU by the year 2050 have been computed. And GHG abatement potential and marginal cost for the five abatement policies carefully selected from the previous researches have been calculated for the year 2020. The policy that makes solid fuel like RDF from flammable wastes and uses them as combustion fuel of electricity generations has been found to be the most efficient and effective one among five policies. The cumulative abatement amount when five policies not mutually exclusive are applied sequentially has been reckoned.

• 아태비즈니스연구
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• 제13권2호
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• pp.139-154
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• 2022

Purpose - This study aims to analyzing of solar power generation cost-benefit. Design/methodology/approach - We analyzed whether there is economic feasibility by selecting parking lots and idle sites located in four areas of Seoul, Gyeonggi, Chungcheong, Jeolla, and Gyeongsang areas nationwide, and analyzing site conditions and installation capacity. Findings - According to the results of the analysis, it was found that there is low profitability in Seoul, Gyeonggi and Chungcheong regions, where the solar radiation was not excellent even if REC is selected through the contract market. However, it is necessary to analyzed the economical validity the profitable validity including environmental benefits (greenhouse gas reduction, NOx, SOx reduction effect) and social benefits (renewable power supply) that is analyzed by income and operating costs which is occurred from electricity sales and REC sales when installing solar power generation facilities. Research implications or Originality - In this study, economic feasibility was evaluated additionally in consideration of environmental and social benefits. In conclusion, it was shown that businesses are not economical when considering only simple financial aspects are also sufficiently economical when it is considering environmental and social benefits.

• 자원ㆍ환경경제연구
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• 제14권2호
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• pp.493-518
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• 2005

최근 기후변화협약이 체결된 지 10여 년 만에 러시아가 교토의정서를 비준함으로써 2005년 2월 16일 온실가스 감축의무를 규정한 교토의정서가 국제법으로서 발효되었다. 우리나라는 현재 국제적인 온실가스 감축의무는 없는 상황이지만, 내년부터 시작될 제2차 공약기간에 관한 국가 의무부담 협상시 선진국으로부터 상당한 압력을 받게 되리라는 전망은 단순한 기우가 아니다. 우리나라가 제2차 공약기간에 온실가스 감축 의무국으로 지정될 경우, 정부를 중심으로 산업부문을 필두로 의무감축량을 배분할 개연성이 높으며, 이 경우 산업부문에서는 다시 업종별, 더 나아가 개별 기업단위로 감축의무가 확대될 것으로 사료된다. 문제는 개별 사업체가 감내해야 하는 감축량의 수준과 부담해야 하는 감축비용의 수준이다. 본 연구에서 과거 배출권 모의거래에 참여했던 국내 11개 기업(전체 온실가스 배출량의 31.5%, 2002년 기준)을 대상으로 살펴본 바에 따르면, 기준연도(2002년 또는 2002년~2004년 평균) 대비 의무이행기간(2006~2007년) 동안 음(-)의 감축목표를 설정시 자체적으로 수행할 수 있는 모든 감축옵션을 활용하더라도 전체적인 의무준수가 어려운 것으로 나타났다. 이러한 문제는 비용효과적 수단이라 평가받고 있는 배출권거래제를 활용하더라도 현재 국제적으로 거래되는 배출권 또는 크레딧의 가격(CER 기준 5달러: 약 6,000원)보다 높은 수준(약 13만 원)의 시장가격이 형성되는 등 온실가스 감축의무 부담에 따른 기업의 경쟁력에 상당한 영향을 미치는 것으로 분석되었다. 이를 토대로 국가 의무부담에 따른 국내 기업간 배출권거래제 설계시 할당량에 따른 거래만으로는 온실가스 시장형성이 어렵다는 점을 도출해 냈고, 연구의 결과로 시장 활성화를 위한 방안으로 프로젝트 크레딧의 시장거래 허용과 정부의 온실가스 감축에 따른 인센티브가 지급되는 시장설계 방안을 제안하였다. 특히 프로젝트 크레딧의 유입과 정부 인센티브의 경우 양을 늘릴수록 비용 효과적인 것이 아니라, 일정 수준이 지나면 오히려 효과가 감소하는 등 최적의 비율을 찾아내는 것이 중요하다는 점을 도출하였다. 본 연구에서는 프로젝트 크레딧의 시장 거래를 허용할 경우에는 전체 감축목표량의 30% 수준, 정부 인센티브를 지급할 경우에는 한계저감비용의 40% 수준, 두 가지 모두를 고려할 경우에는 30% 수준이 최적 상태임을 사례로 제시하였다. 프로젝트 크레딧을 활용한 경우에는 첫째, 국가 의무부담 이전의 조기행동(Early Action) 활성화, 둘째, 국내 흡수원 사업의 활성화, 셋째, 해외 개도국에 대한 청정개발체제 사업의 활성화, 넷째, 배출권거래 참여기업간의 온실가스 감축사업(국내버전의 공동이행제도), 다섯째, 배출권거래제에 참여하지 않는 기업에 대한 온실가스 감축사업 추진(국내 버전의 청정개발체제) 등과 같은 추가적인 사업들이 활성화될 수도 있음을 고려해 볼 수 있다. 본 연구결과 실제 국내 배출권거래제 설계시 참여 대상 기업에 대한 면밀한 분석을 통해 가장 합리적인 시장 활성화를 마련하고, 기업의 입장에서는 자체 한계저감비용 및 비용효과적인 온실가스 감축옵션에 관한 사전 파악을 통해 정부와의 감축의무 배분과 관련된 논의에 적극 참여하는 것이 바람직할 것으로 사료된다.

• ETRI Journal
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• 제26권6호
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• pp.665-668
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• 2004

The introduction of a mobile virtual network operator (MVNO) system is expected to increase consumer benefits, boost competition in the mobile market, utilize idle bandwidth, and expedite mobile-fixed line convergence and growth in the mobile Internet market. This research endeavors to study the optimal access charge for an MVNO system, which is expected to be introduced to the Korean mobile communications market. We found that the optimal access charge is higher in the interdependent model than in the independent model if demand for mobile phone service is based on a substitution relationship. We also found that the optimal access charge is higher than the marginal cost.

• The Journal of Advanced Prosthodontics
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• 제9권2호
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• pp.138-142
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• 2017

In restorative treatment using fixed dental prostheses, dentists should select appropriate restoration material among various types of dental materials. The strength, marginal fit, esthetics, wear resistance, biocompatibility, and cost are important factors in the choice of restoration materials. The present case showed a surface stain on a monolithic zirconia restoration that was due to wear between the monolithic zirconia restoration and the base metal alloy restoration. This phenomenon was confirmed by surface roughness measurement and electron probe micro-analysis.

• 전기학회논문지
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• 제63권7호
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• pp.889-895
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• 2014

Korea electric power industry had been under vertical monopoly but is typically getting restructured for free competition. An ideal pricing system under the competitive market system is 'unbundled pricing system' and 'marginal pricing system', but the current pricing system still adheres to the traditional bundled system and the average cost pricing system. Especially, progressive electricity rates for residential use reflect governmental policy-making which is focused on income redistribution & welfare, industrial supports and energy saving. This study proposes new and reasonable residential electricity pricing systems which are Time-Of-Use (TOU) and Real-Time Pricing (RTP) to reflect variations in the wholesale price of electricity. It also presents examples of various tariffs for residential electricity pricing systems.

• 한국IT서비스학회지
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• 제8권2호
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• pp.205-228
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• 2009

This paper examines how online product information changes the customers' purchase intentions from subjectivity-objectivity dichotomy perspective. Quality and Preference are proposed as product evaluation criteria and their marginal changes with product information differentiation are hypothesized. An experimental survey was conducted to 57 subjects and the hypotheses were partially supported through PLS path comparison method. The study contributes to IS research by proposing a simple and effective product evaluation framework and by abstracting the impact of product information from other factors. Finally, we suggest the utilization of product information with the optimization of the cost-benefit structure between information and purchase intention.

• 산업경영시스템학회지
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• 제37권3호
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• pp.64-74
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• 2014

We show how a supplier can peg cost measures to the reliability of his time guarantees via the penalty costs considered in the framework. The framework also enables us to study the connections between the logistics network and the market. In this context, we show that even when the market base increases significantly, the supplier can still use the logistics network designed to satisfy lower demand density, with only a marginal reduction in profit. Finally we show how the framework is useful to evaluate and compare various logistics system improvement strategies. The supplier can then easily choose the improvement strategy that increases his profit with the minimal increase in his logistics costs.

• 전산구조공학
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• 제8권4호
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• pp.99-106
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• 1995

구조물의 최적설계에 대한 일반적인 개념이 제시되며 Gradient Projection법과 설계민감도 해석을 사용한 최적화 알고리즘이 논의된다. 6층 평면 철골 구조물의 최소무게설계의 예를 통해 이 알고리즘의 적용을 예시한다. 시스템 전체의 비용분석뿐만 아니라 임계 비용 및 설계민감도 해석과 같은 이 알고리즘의 장점에 관하여 설명한다.