• Nuclear Engineering and Technology
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• 제51권5호
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• pp.1355-1364
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• 2019

A recently published nuclear forensics methodology for source discrimination of separated weapons-grade plutonium utilizes intra-element isotope ratios and a maximum likelihood formulation to identify the most likely source reactor-type, fuel burnup and time since irradiation of unknown material. Sensitivity studies performed here on the effects of random measurement error and the uncertainty in intra-element isotope ratio values show that different intra-element isotope ratios have disproportionate contributions to the determination of the reactor parameters. The methodology is robust to individual errors in measured intra-element isotope ratio values and even more so for uniform systematic errors due to competing effects on the predictions from the selected intra-element isotope ratios suite. For a unique sample-model pair, simulation uncertainties of up to 28% are acceptable without impeding successful source-reactor discrimination. However, for a generic sample with multiple plausible sources within the reactor library, uncertainties of 7% or less may be required. The results confirm the critical role of accurate reactor core physics, fuel burnup simulations and experimental measurements in the proposed methodology where increased simulation uncertainty is found to significantly affect the capability to discriminate between the reactors in the library.

• Nuclear Engineering and Technology
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• 제51권2호
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• pp.384-393
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• 2019

An experimental validation of a nuclear forensics methodology for the source reactor-type discrimination of separated weapons-useable plutonium is presented. The methodology uses measured values of intra-element isotope ratios of plutonium and fission product contaminants. MCNP radiation transport codes were used for various reactor core modeling and fuel burnup simulations. A reactor-dependent library of intra-element isotope ratio values as a function of burnup and time since irradiation was created from the simulation results. The experimental validation of the methodology was achieved by performing two low-burnup experimental irradiations, resulting in distinct fuel samples containing sub-milligram quantities of weapons-useable plutonium. The irradiated samples were subjected to gamma and mass spectrometry to measure several intra-element isotope ratios. For each reactor in the library, a maximum likelihood calculation was utilized to compare the measured and simulated intra-element isotope ratio values, producing a likelihood value which is proportional to the probability of observing the measured ratio values, given a particular reactor in the library. The measured intra-element isotope ratio values of both irradiated samples and its comparison with the simulation predictions using maximum likelihood analyses are presented. The analyses validate the nuclear forensics methodology developed.

• 보건행정학회지
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• 제8권2호
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• pp.88-109
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• 1998

The main purpose of this study is to compare the traditional cost system and ABC(Activity Based Cost) system of clinical laboratory department in a hospital. The study subject was 296 services in clinical laboratory from March, 1997 to August, 1997. In a new costing system, cost for a lab test consist of direct cost element, activity based cost element, and allocated common cost element. In a traditional cost system, cost elements included direct cost element and indirect cost allocated based on test volumes The major findings of this research were as follows. 1. In the application of ABC system, total cost was analyzed as follows. Direct cost was 39.3% of total cost. Activity cost and allocation were 20.9% and 39.8%, respectively. The results of analysis to use traditional cost system were as follows. Direct cost was 39.3% and it was as same as the result of direct cost of ABC system. Indirect cost was 60.7%. 2. Activities of clinical laboratory of subject hospital were registration, pre-test operation, test, test result handling, delivery, culture, post-test operation, technical support, management support, and educational support. 3. The differences of the case of higher number of test case being carried out, the cost of ABC system was lower than the cost of traditional cost system. Otherwise in the case of lower number of test case being carried out, the rests have not been appropriately evaluated, and effective management were needed in clinical laboratory.

• 항공우주시스템공학회지
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• 제18권2호
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• pp.29-39
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• 2024

최근 우주 분야는 국내외적으로 국가 경제 및 안보의 중요한 요소로 자리 잡고 있다. 이러한 우주 분야의 발전을 위해서는 정책이 매우 중요한 역할을 수행해야 한다. 하지만, '우주 정책'에 대한 명확한 설명과 정의가 부족하여, 우주 정책에 참여하고자 하는 많은 연구자들이 어려움을 겪고 있다. 이에 본 논문에서는 '우주 정책'에 대해 정의를 내리고, '우주 정책'을 '우주 연구개발 정책', '우주 경제 정책', '우주 법·제도 정책', '우주 안보 정책', '우주 외교 정책'으로 구분하여 설명한다. 또한 각각의 우주 정책 분야의 중요한 요소가 무엇인지에 대해 분석한다. 복잡해지는 우주 분야와 같이 우주 정책도 다양한 관점에서의 접근이 필요한 시점이다. 본 논문을 통해 우주 정책 및 향후 주요 이슈에 대한 이해를 가질 수 있을 것이다.

• 한국지열·수열에너지학회논문집
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• 제8권2호
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• pp.16-26
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• 2012

The consultation with building energy experts working at domestic government-funded research institutes and enterprises on performance set, element technology, and policy for the realization of low-energy and the survey with construction workers on the relevance of climate change in building construction, government support policy, and methodologies for the construction of low-energy house were carried in the study. In addition the public element preference survey on the low-energy house and awareness research on the low-carbonization of building were carried and presented for the development of affordable low-energy house. There was a big difference in the recognition of building energy performance setting and setting for the construction cost to realize it between experts and ordinary citizens in the study. To fill this gap education and promotion of zero energy house and securing economic feasibility through the commercialization of element technology will be needed. The satisfaction in government's zero energy house policy was normally low. To improve this low satisfaction administrative and technical support are considered to be expanded. Common high cost of construction was the top priority to resolve the problem, and enhancing renewable energy grants, tax relief, and substantial cost support could be as detailed solutions.

• 한국도서관정보학회지
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• 제33권3호
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• pp.41-60
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• 2002

정보사회의 도서관은 실물자료의 집적소 및 이용공간, 네트웍 및 웹자원에 대한 접근점, 평생교육의 지원시설, 지식정보의 제공기관으로서의 역할을 수행해야 한다. 이러한 역할은 국가 및 자치단체의 문화 정책에서 도서관이 핵심요소로 취급될 때 가능하다. 따라서 본 연구는 도서관 및 독서문제가 문화혁명의 메뉴로 부상하여 주무부처에서 종합적인 발전계획을 마련하고 있는 차제에 그 동안 국내에서 집행되었거나 수립 중에 있는 도서관·정보정책의 스펙트럼을 다각도로 분석하고 신세기의 정책적 지향성을 모색하고자 한다.

• 한국비블리아학회지
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• 제32권1호
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• pp.391-413
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• 2021

국가 운영 정책을 기획하고, 실행하고, 평가하기 위한 모든 영역의 의사결정 단계에서 정책연구정보는 매우 중요한 정보원이라 할 수 있다. 국책연구기관의 정책연구 과제는 연구 설계부터 활용 효과에 대한 성과 평가까지 그 효율성과 효과성을 보장하기 위해 연구 전 과정에 있어서 꼼꼼한 단계를 거쳐 관리되고 있다. 그러나 실제 정책연구정보를 필요로 하는 수요자나 일반 국민에게 직접적으로 노출되는 정보는 연구과제의 최종 성과물인 정책연구보고서 형태로 발간된 자료이다. 국무총리산하 경제·인문사회연구회에서 구축·운영하고 있는 국가정책연구포털(NKIS)은 27개의 국책연구기관의 정책성과물과 함께 기관 간 협동 연구를 수행하여 산출된 연구보고서를 통합 관리하는 대국민 정보제공서비스이다. 본 연구는 국가정책연구포털(NKIS)의 운영 현황과 정보 관리 현황을 소개하면서 국책연구기관의 정책연구정보자료의 관리 특성을 파악하고, 외부 서비스와의 API(응용 프로그램 인터페이스)를 위해 고려해야 하는 특이사항을 도출하여, 표준화된 형태의 공유 데이터 요소를 도출하는 것을 목적으로 한다.

• 디지털융복합연구
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• 제10권7호
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• pp.213-219
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• 2012

게임 콘텐츠의 아이덴티티 구축으로 타 게임과의 차별성과 상품성을 높이기 위한 게임 요소를 고찰하고 각 요소를 이용한 아이덴티티 구축사례를 조사하여 게임 개발시 고려하여야 할 요소를 4가지로 시각요소, 청각요소, 내재요소 와 기타요소를 추출하였다.

• 기술혁신학회지
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• 제1권1호
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• pp.9-22
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• 1998

With the advent of new order of international competition, the technology Policy of Korea has been changed from vertical one which focuses on specific technologies or selective industries to a horizontal one which supports R&D activities on a neutral basis. TIP(Technology Infrastructure Policy) is WTO free in the sense that it is Indirect method of supporting technology development and properly defined as a part of government role by OECD. Technology infrastructure is embodied in human capital, and includes also elements of physical capital and knowledge. Hence it is more differentiated than, and distinguished from conventional infrastructure. It implies a need for carefully designed strategy with the recognition of those differences. As a fundamental element of innovation and technological development, technology infrastructure should become the main focus of industrial technology Policy.

• 한국산업보건학회지
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• 제24권1호
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• pp.79-90
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• 2014

Objectives: The aim of this study was to suggest preliminary data for the establishment of communication methodology of asbestos risk, fit for the features of each audiences, by grasping the features of risk communication by each element for each group survey. Methods: For this study, a questionnaire survey has been conducted from May to August 2012 and responses of 617 people including 214 school asbestos managers, 95 asbestos business managers, and 308 general public have been analyzed. Results: The feature by element of risk communication shows that to give information through non-governmental organizations with reliability such as colleges, research institutes, asbestos-related associations, etc among the entire investigated groups, is most effective. Lastly, for stakeholders related to asbestos, the public feedback for governmental asbestos management policy shows that it was considered that there is lack of reality due to comprehension deficit for situation, lack of a system of asbestos general management in the country and lack of policy connectivity among the branches of the government, and between the central government and the local government. However, the general public selected lack of various information disclosure, education, publicity for asbestos and lack of communication with citizens as the biggest problems.