• 제목/요약/키워드: Reliability standard

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정지/저출력 확률론적안전성평가에서의 국내 표준 인간신뢰도분석 절차 개발을 위한 원인기반 결정수목 방법 검토 (Review of Cause-Based Decision Tree Approach for the Development of Domestic Standard Human Reliability Analysis Procedure in Low Power/Shutdown Operation Probabilistic Safety Assessment)

  • 강대일;정원대
    • 한국원자력학회:학술대회논문집
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    • 한국원자력학회 2003년도 춘계학술발표대회 요약집
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    • pp.201-201
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    • 2003
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The Reliability of Thickness Measurement of the Deep Fiber of the Lumbar Multifidus Using Ultrasonography

  • Jung, Doh-Heon;Kim, Su-Jung;Yi, Chung-Hwi;Cynn, Heon-Seock;Choi, Houng-Sik
    • 한국전문물리치료학회지
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    • 제17권4호
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    • pp.49-54
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    • 2010
  • The reliability of the thickness measurement of the lumbar multifidus (LMD using real-time ultrasonography (US) was determined in only the superficial fiber of the lumbar multifidus (SM). However, previous studies have not examined the reliability of the deep fiber of the LM (DM). The purpose of this study was to determine the intrarater and the interrater reliability of the thickness measurements of DM using US. Eleven heathy males participated in the study. The thickness of the DM was measured with an US in the prone position. Reliability was examined using intraclass correlation coefficients (ICC), standard error of the measurement (SEM), and the Bland and Altman plot. ICC(3,1) was used to calculate the interrater reliability of the thickness measurement of DM using the values from both the first and second test sessions. Additionally, ICC(3,1) was used to calculate the intrarater reliability of the measurements over two days using the measurements obtained in test session 1 and lest session 2. The results of this study were as follows: 1) the ICC(3,1) value for interrater reliability was .94 in the first test session, and .93 in the second test session. 2) the ICC(3,1) values for intrarater reliability of the measurements over two days was .90 in both the first examiner and the second examiner. The interrater reliability and interrater reliability of the DM measurements, obtained via the US protocol used in this research was excellent. Therefore, we conclude that the thickness measurement of the DM obtaioned from the US protocol used in this research would be useful for clinician assessment of the thickness of the DM.

'최저주거기준'에 관한 국내 선행 연구경향 분석 (A Analysis on the Previous Research Trend of 'Minimum Housing Standard')

  • 현지원;이연숙;안소미
    • 한국실내디자인학회논문집
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    • 제26권4호
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    • pp.3-11
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    • 2017
  • The appropriate area for human's most basic living space is an important factor. Therefore, the 'minimum housing standard' is a very important factor to ensure a minimum quality of living space for human life. In Korea, however, the importance of the 'minimum housing standard' has been neglected for about 20 years. Even in Korea, the 'minimum housing standard' has become an nominal existence. In other countries, studies have long been conducted on the minimum housing standards, but studies have shown that studies on the minimum housing standard are not actively occurring in Korea. The purpose of this study is to diagnose the current status of the 'minimum housing standard' in Korea and to explore the direction of future research. The study included a total of 29 researches commissioned by the Korea Academic Research Institute (KCI). To ensure the objectivity and reliability of the analysis, analyzed year of research, field of research, method of research, contents of research. Through this study, it is possible to grasp the tendency of previous studies on 'minimum housing standard' in Korea and it is meaningful to increase the usability of 'minimum housing standard' in residential planning. It is also expected that future research on 'minimum housing standards' will be able to present the direction of the field to be developed.

패트리네트를 이용한 병행 시스템의 설계 및 신뢰성 분석 : 승강기 시스템을 중심으로 (Design and Reliability Analysis of Concurrent System by Petri Nets: A Case on Lift System)

  • 김기범;이강수
    • 전자공학회논문지B
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    • 제30B권2호
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    • pp.1-7
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    • 1993
  • In this paper, we show that Petri nets can be applied to design and reliability analysis of concurrent, parallel and embedded mode system such as a lift system that is familiar to our daily life. Modeling the behavioral characteristics of the lift system we extend the standard Petri nets by nadditionally constant timed transition, fault transition, stochastic imed ttransition and conditional transition concepts. Likewise, we present esults of rdesign and analysis of the system. This method can be applied to esign and danalysis of any other concurrent systems.

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Bootstrap Confidence Intervals for Reliability in 1-way ANOVA Random Model

  • Dal Ho Kim;Jang Sik Cho
    • Communications for Statistical Applications and Methods
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    • 제3권1호
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    • pp.87-99
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    • 1996
  • We construct bootstrap confidence intervals for reliability, R= P{X>Y}, where X and Y are independent normal random variables. One way ANOVA random effect models are assumed for the populations of X and Y, where standard deviations $\sigma_{x}$ and $\sigma_{y}$ are unequal. We investigate the accuracy of the proposed bootstrap confidence intervals and classical confidence intervals work better than classical confidence interval for small sample and/or large value of R.

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와이블 분포에서의 종결형 축차시험방안 (Truncated Sequential Test Plan under Weibull Distribution)

  • 정해성;차명수;오근태
    • 한국신뢰성학회지:신뢰성응용연구
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    • 제3권2호
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    • pp.137-143
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    • 2003
  • Sequential test plans are characterized by decision rules for accepting or rejecting compliance, or continuing the test at my test time. They are determined by selected values of risks and discrimination ratio. The sequential test plans in the international standard such as MIL-HDBK-781A are based on the assumption that the underlying distribution of times between failures is exponential. In this paper, sequential test plans are extended to the Weibull distribution case. Simulation studies are performed to examine the reasonability in this extension.

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