• 제목/요약/키워드: FTA 성과

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Digraph를 이용한 Fault Tree 자동합성

  • Lee, Geun-Won;Jung, Won-Seok;Moon, Il
    • Proceedings of the Korean Institute of Industrial Safety Conference
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    • 2000.11a
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    • pp.390-395
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    • 2000
  • 화학공정에서 발생하는 사고의 주요 원인으로는 조업자의 실수, 장치고장, 안전장치의 미비, 운전조건의 이상을 들 수 있다. 화학공정의 위험 분석은 HAZOP, FTA, ETA, 및 CA 등이 산업계에서 가장 유용하고 폭넓게 사용되고 있는 분석 방법이다. 이들 위험분석 기법 중에서 FTA(Fault Tree Analysis)는 사고의 세부적인 원인목록을 작성하여 해당사고의 구조를 파악할 수 있으며 복잡한 시스템내의 결함을 최소시간과 최소비용으로 효과적으로 예방할 수 있게 하는 정량적 위험성 평가 방법이다. 일반적으로 이 방법들은 전문가 집단에 의해 수행되기 때문에 전문가 집단의 능력과 투여되는 시간에 많이 비례하여 왔던 것이 사실이다. 이러한 이유로 인하여 위험분석방법의 자동화가 절실히 대두되고 있는 실정이다.(중략)

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Quantitative Safety Assessment for Hydrogen Station Dispenser (수소 충전소 충전기의 정량적 안전성 평가)

  • Rhie, Kwang-Won;Kim, Tae-Hun;Lee, Taeck-Hong
    • Transactions of the Korean hydrogen and new energy society
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    • v.17 no.3
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    • pp.272-278
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    • 2006
  • This study is quantitatively assessing of safety about dispenser of hydrogen station because it is hydrogen energy to efficient safety use. The large leakage of hydrogen gas is the most important accident among others occurrence possibility in hydrogen station. It had written FT by top event and calculated unavailability, m-cutsets, leakage frequency, etc with FTA after each base event collect reliability data by reliability data handbook, THERP-HRA and estimation of the engineering.

Fault Diagnosis of Screw type Air Compressor (스크루형 공기압축기의 고장진단)

  • Bae Yong-hwan
    • Journal of Advanced Marine Engineering and Technology
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    • v.28 no.7
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    • pp.1092-1100
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    • 2004
  • This paper describes the application of fault tree technique to analyze of compressor failure. Fault tree analysis technique involves the decomposition of a system into the specific form of fault tree where certain basic events lead to a specified top event which signifies the total failure of the system. In this research. fault trees for failure analysis of screw type air compressor are made. This fault trees are used to obtain minimal cut sets from system failure and system failure rate for the top event occurrence can be calculated. It is Possible to estimate air compressor reliability by using constructed fault trees through compressor failure example. It is Proved that FTA is efficient to investigate the compressor failure modes and diagnose system.

성인병 뉴스 제315호

  • The Korea Association of Chronic Disease
    • The Korean Chronic Disease News
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    • no.315
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    • pp.1-18
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    • 2007
  • 대구광역시 서구 보건소 이재무 소장/포괄적 맞춤형 건강진단 실시/“공중보건의수급 대란 온다”/맞춤형 건강진단 어떤 내용 담고있나/“건강투자로 미래 성장 동력 확충”/한미 FTA,“ 보건의료계 영향 적다”/한미 FTA협상 주요 내용/교육.의료는 왜 협상서 빠졌나/성인 절반이 심뇌혈관질환 고위험군/암환자 암정보센터 HP로 오세요!/“꿈의 암치료 시대”열려/“구민이 함께 하는 건강한 사회.행복한 사회”/대구시 서구보건소 비만관리사업/‘제약산업 발전기금’조성 필요/“의약품위다국적 제약 참여할 수 없다”/공정거래자율준수프로그램(CP) 도입/중소제약 위한‘특별법’제정 요구/부실한 인적 자본, 미래 위한 건강투자 시급/

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Fault Tree Analysis and Failure Mode Effects and Criticality Analysis for Security Improvement of Smart Learning System (스마트 러닝 시스템의 보안성 개선을 위한 고장 트리 분석과 고장 유형 영향 및 치명도 분석)

  • Cheon, Hoe-Young;Park, Man-Gon
    • Journal of Korea Multimedia Society
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    • v.20 no.11
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    • pp.1793-1802
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    • 2017
  • In the recent years, IT and Network Technology has rapidly advanced environment in accordance with the needs of the times, the usage of the smart learning service is increasing. Smart learning is extended from e-learning which is limited concept of space and place. This system can be easily exposed to the various security threats due to characteristic of wireless service system. Therefore, this paper proposes the improvement methods of smart learning system security by use of faults analysis methods such as the FTA(Fault Tree Analysis) and FMECA(Failure Mode Effects and Criticality Analysis) utilizing the consolidated analysis method which maximized advantage and minimized disadvantage of each technique.

A Study on the Economical Efficiency and Advance Strategy in African Market (아프리카시장의 경제성과 진출 전략에 관한 연구)

  • Lee, Keun-Young
    • Journal of the Korea Society of Computer and Information
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    • v.15 no.6
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    • pp.139-145
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    • 2010
  • Since the beginning of 1960s, Korea has been advanced into Africa but we are much too late to extend its business in African Market due to lack of understanding about there. From being the latest Africa is understanding as 'Rising Sun & Post Brics' for Korea. As an advance strategy in Afrcan Market suggest to get international co-operation from ECA, OAU, IFC together with IMF & IBRD etc.

Feasibility Study on the Fault Tree Analysis Approach for the Management of the Faults in Running PCR Analysis (PCR 과정의 오류 관리를 위한 Fault Tree Analysis 적용에 관한 시범적 연구)

  • Lim, Ji-Su;Park, Ae-Ri;Lee, Seung-Ju;Hong, Kwang-Won
    • Applied Biological Chemistry
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    • v.50 no.4
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    • pp.245-252
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    • 2007
  • FTA (fault tree analysis), an analytical method for system failure management, was employed in the management of faults in running PCR analysis. PCR is executed through several processes, in which the process of PCR machine operation was selected for the analysis by FTA. The reason for choosing the simplest process in the PCR analysis was to adopt it as a first trial to test a feasibility of the FTA approach. First, fault events-top event, intermediate event, basic events-were identified by survey on expert knowledge of PCR. Then those events were correlated deductively to build a fault tree in hierarchical structure. The fault tree was evaluated qualitatively and quantitatively, yielding minimal cut sets, structural importance, common cause vulnerability, simulation of probability of occurrence of top event, cut set importance, item importance and sensitivity. The top event was 'errors in the step of PCR machine operation in running PCR analysis'. The major intermediate events were 'failures in instrument' and 'errors in actions in experiment'. The basic events were four events, one event and one event based on human errors, instrument failure and energy source failure, respectively. Those events were combined with Boolean logic gates-AND or OR, constructing a fault tree. In the qualitative evaluation of the tree, the basic events-'errors in preparing the reaction mixture', 'errors in setting temperature and time of PCR machine', 'failure of electrical power during running PCR machine', 'errors in selecting adequate PCR machine'-proved the most critical in the occurrence of the fault of the top event. In the quantitative evaluation, the list of the critical events were not the same as that from the qualitative evaluation. It was because the probability value of PCR machine failure, not on the list above though, increased with used time, and the probability of the events of electricity failure and defective of PCR machine were given zero due to rare likelihood of the events in general. It was concluded that this feasibility study is worth being a means to introduce the novel technique, FTA, to the management of faults in running PCR analysis.

소프트웨어 안전성 평가를 위한 시스템 결함 분석 기법

  • 백동근;성경배;박만곤
    • Proceedings of the Korea Association of Information Systems Conference
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    • 1997.10a
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    • pp.389-402
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    • 1997
  • 컴퓨터 소프트웨어를 내장한 시스템의 안전성을 평가하기 위한 여러 가지의 결함 분석 기법들이 있다. 이러한 결함 분석 기법들은 전통적으로는 하나의 시스템을 분석하는데 단지 하나의 방법으로만 분석해 왔으나, 시스템의 종류와 특성이 다양해지면서 시스템에 가 장 알맞는 분석 기법이 동원되어야 함은 이제 필수적이다. 여기에 착안하여, 시스템 내에서 소프트웨어의 크기가 비교적 작고, 안전성과 관련한 시스템의 반응 시간이 특별히 민감하지 않는 소프트웨어의 안전성을 평가하는 방법으로 결함 트리 분석(FTA)과 소프트웨어 오류경 향 및 영향 분석(소프트웨어 FMEA)을 결합한 시스템 결함 분석 방법을 제안하고자 한다.

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