• Nuclear Engineering and Technology
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• 제54권3호
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• pp.817-825
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• 2022

A recent benchmarking effort, under the auspices of the Organization for Economic Cooperation and Development (OECD) Nuclear Energy Agency (NEA), has been made to evaluate the current state of modeling and simulation tools available to model fluoride salt-cooled high temperature reactors (FHRs). The FHR benchmarking effort considered in this work consists of several cases evaluating the neutronic parameters of a 2D prismatic FHR fuel assembly model using the participants' choice of simulation tools. Benchmark participants blindly submitted results for comparison with overall good agreement, except for some which significantly differed on cases utilizing a molybdenum-bearing control rod. Participants utilizing more recently updated explicit isotopic cross sections had consistent results, whereas those using elemental molybdenum cross sections observed reactivity differences on the order of thousands of pcm relative to their peers. Through a series of supporting tests, the authors attribute the differences as being nuclear data driven from using older legacy elemental molybdenum cross sections. Quantitative analysis is conducted on the control rod to identify spectral, reaction rate, and cross section phenomena responsible for the observed differences. Results confirm the observed differences are attributable to the use of elemental cross sections which overestimate the reaction rates in strong resonance channels.

• Nuclear Engineering and Technology
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• 제54권11호
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• pp.3975-3984
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• 2022

Distributed control system architecture is adopted for I&C systems of Prototype Fast Breeder Reactor, where the geographically distributed control systems are connected to centralized servers & display stations via switched Ethernet networks. TCP/IP communication plays a significant role in the successful operations of this architecture. The communication tasks at control nodes are taken care by TCP/IP offload modules; local area switched network is realized using layer-2/3 switches, which are finally connected to network interfaces of centralized servers & display stations. Safety, security, reliability, and fault tolerance of control systems used for safety-related applications of nuclear power plants is ensured by indigenous design and qualification as per guidelines laid down by regulatory authorities. In the case of commercially available components, appropriate suitability analysis is required for getting the operation clearances from regulatory authorities. This paper details the proposed approach for the suitability analysis of TCP/IP communication nodes, including control systems at the field, network switches, and servers/display stations. Development of test platform using commercially available tools and diagnostics software engineered for control nodes/display stations are described. Each TCP link behavior with impaired packets and multiple traffic loads is described, followed by benchmarking of the network switch's routing characteristics and security features.

• 국제학술발표논문집
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• The 6th International Conference on Construction Engineering and Project Management
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• pp.721-722
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• 2015

The aim of this research is to provide a direction to benchmark advanced construction companies from Spain and France by deriving business strategies through SWOT analysis in order to strengthen overseas expansion and competitiveness of domestic construction companies.

• 한국전자거래학회지
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• 제19권3호
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• pp.91-105
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• 2014

본 논문의 목적은 지역을 대상으로 자료포락분석방법을 적용하여 한방병원에 내원한 환자의 지역적 특성 분석 및 성과개선규모를 파악하는 데 있다. 본 논문에서 사용된 자료는 대전광역시에서 운영 중인 일개 한방병원을 대상으로 수집되었다. 환자의 위치 정보는 행정구역의 가장 작은 단위인 '동'을 사용하였으며, 연구대상 병원의 의무기록 자료에서 환자 주소를 기준으로 수집하였다. 각 행정동의 인구사회학적 변수들은 통계청 자료를 사용하였다. 자료포락분석을 이용하여 행정동에서 내원한 환자의 규모를 비교 평가하였고, 그리고 Tobit 회귀분석을 이용하여 효율성 점수와 지역 특성 변수들 간의 관계를 분석하였다. DEA 분석결과 효율적인 동은 6개였으며, Tobit 회귀분석에서는 각 동별 기초생활수급자수와 총인구수 변수에서 통계적으로 유의하였다. 본 논문에서는 분석단위를 행정구역의 최소단위인 행정동 별로 세분화하여 자료포락분석방법이 가지는 벤치마킹의 개념을 이용하여 분석하였다는 점에서 의의가 있다. 그리고, 병원의 성과 개선을 위해 필요로 하는 각 지역별 환자수를 구체적으로 파악하여다는 점에서 의의가 있다.

• 디지털융복합연구
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• 제10권9호
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• pp.159-164
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• 2012

디스플레이 산업은 한국경제에서 중요한 역할을 하고 있음에도 불구하고, 디스플레이 기업의 효율성을 분석한 연구는 수행되지 않았다. 본 논문의 목적은 DEA 모형을 이용하여 국내 상장 디스플레이 기업의 효율성을 분석하고 측정하는 것으로 DEA의 CCR 모형과 BCC 모형을 이용하여 국내 상장 디스플레이 기업의 효율성을 평가하고 규모의 효율성도 평가한다. 또한 비효율 그룹으로 분류된 기업이 효율성 그룹으로 이동하기 위해 효율성 그룹을 벤치마킹을 통하여 개선해야할 효율성 수치도 제공한다. 본 연구에서는 2010년말 기준 7개의 코스피 상장 기업과 37개의 코스닥 상장기업을 포함한 44개의 상장 기업을 분석하였다. 분석 결과 CCR 모형에서 효율성이 1인 기업은 6개였으며 BCC모형에서는 14개였다. 추가적으로 6개 기업의 규모의 효율성을 가지고 있는 것으로 분석되었다. 궁극적으로 효율성 분석은 비효율 그룹이 기업이 벤치마킹 기업을 찾아 효율성을 개선하기 위한 유용한 정보를 제공할 수 있다.

• 농촌계획
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• 제12권1호
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• pp.59-66
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• 2006

The purposes of this study were to identify leadership competences of rural leaders and to analyze leadership competency of leaders. The study carried out by questionnaire and focus group interview on expert panels. To analyze leadership competency, the data was collected from 273 rural leaders by stratified random sampling. SPSSWIN/ver10 program was used for analyzing data with t-test and IPA method. The study suggests twenty low types of leadership competences which were information, vision, decision making, motivation communication, education residents, managing residents, loaming, flexibility, problem solving, presentation program management, customer orientation service knowledge, making relationship, creative idea, business understanding, brand development, conflict resolution negotiation, assessment, business management, coaching and feed back. Whereas leaders with middle school educational career required developing program management, maintaining achievement and benchmarking, leaders with high school were morel likely to develope self-learning, to benchmark their knowhow and brand development competency. Whereas leader with less low years experiences as leader have been considered as developing coaching/feedback brand development and program development, leaders with more five years as leader should consider developing benchmarking, resident education, and brand development. The study suggests that the extension agents on public should develop leadership program according to the competency differences of leaders.

• 한국컴퓨터정보학회논문지
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• 제10권2호
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• pp.11-19
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• 2005

본 논문에서는 보안 운영체제의 성능 평가 모델 및 시나리오에 대해서 기술하고 있으며, 보안 운영체제 성능 평가 방법을 이용하여 상용 보안 운영체제의 성능을 분석하였다. 다양한 성능 분석 툴을 이용하여 보안 운영체제의 오버헤드 결과를 자세히 분석하고 있다. 본 연구를 통해서 보안 운영체제와 일반 운영체제의 성능 비교가 가능할 것이며, 보안 운영체제에 다양한 보안 정책이 추가되었을 때와 그렇지 않은 경우 직접적인 성능의 차이를 볼 수 있게 된다. 본 연구결과는 보안 운영체제 구매자, 평가자 및 개발자들에게 가이드라인이 될 수 있으며, 보안 운영체제의 성능 평가에 대한 기초 자료로 활용 될 수 있다

• 한국지역사회생활과학회지
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• 제17권1호
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• pp.3-10
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• 2006

The purpose of this study was to analyze leadership competency in the rural leader roles. The data were derived from 317 leaders in 97 rural communities by questionnaire. SPSSWIN/ver10 was adopted t-test and IPA (Importance-Performance Analysis) methods employed. The major findings of this study were as follows; Rural leaders should concentrate on developing coaching/feed back, program management skills, and presentation skills. Administrative head of village should pay attention to benchmarking, brand development and conflict resolution rather than resident management, service knowledge, and making relationships. Leaders of village development council should concentrate on brand development, benchmarking, and educating residents. Head of women's organizations should concentrate on developing assessments, educating residents, and resolving conflict skills, whereas members of Samaeul organization should try to concentrate on program management, coaching/feed back and presentation skills. Rural leaders showed different leadership competency by the IPA. Therefore, this study suggested that leadership education for rural leaders should consider leadership competency.

• 국제학술발표논문집
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• The 4th International Conference on Construction Engineering and Project Management Organized by the University of New South Wales
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• pp.324-329
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• 2011

Significant decisions are made by the project team during the early planning phase of capital facility project developments. The preproject planning phase begins after a decision is made to proceed with a project concept and continues until the detail design stage. Many of the industry practitioners and researchers have recognized the importance of preproject planning and that inadequate early planning is one of the key factors affecting project success. Nevertheless, the preproject planning practices vary significantly for the construction industry in Taiwan and the quality of preproject planning relies heavily on individual project team's experience. This research sets out to benchmark the preproject planning practice for the building construction industry in Taiwan. From late 2007 to early 2010, the researchers collected information from a total of 92 building construction projects using questionnaire survey. The analysis results show that the surveyed projects with better preproject planning have better cost and schedule performances on average. It is recommended that project team spend more efforts in the preproject planning stage to have a better chance of achieving project success.

• 한국ITS학회 논문지
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• 제16권5호
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• pp.60-71
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• 2017

본 연구는 고령자를 위한 지하철 역사의 수직이동시설을 평가하고 개선방안을 분석하는 것을 목적으로 한다. 서울시의 통행량이 많은 31개의 지하철 역사를 평가하기 위해 자료포락분석(DEA)을 이용한다. DEA의 투입변수는 스마트카드 자료를 이용하여 수집한 고령자 통행수 및 통행비율을 포함하며, 산출변수는 엘리베이터 설치 대수와 100계단 당 에스컬레이터 설치 대수로 구성된다. 분석 결과, 31개 지하철 역사의 평균 지수는 0.62로 산출되었으며, 잠실역, 가산디지털단지역, 건대입구역, 동묘역이 가장 우수한 것으로 나타났다. 이 4개의 역사는 지수가 낮은 다른 역사들을 위한 참조 그룹으로 설정된다. 참조그룹과의 비교를 통해 각 역사의 수직이동시설을 제고하기 위한 방안들이 제안된다.