• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2012년 춘계학술대회
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• pp.293-300
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• 2012

Reliability measures of questionnaire and ${\chi}^2$ contingency tests of categorized responses are most practical tools to analyze the characteristics of subjects of survey study. This research evaluates the Cronbaha's reliability measures by using Repeated Measure Design (RMD) with illustrated MINITAB examples. In addition, ${\chi}^2$ statistics of each cell of categorized tables can be effectively interpreted with the symmetric plot of correspondence analysis. The practical example is also discussed to provide comprehensive understanding of topic.

• 대한안전경영과학회지
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• 제10권4호
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• pp.159-163
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• 2008

This paper proposes various measures of reliability, maintainability and availability in information technology service management(ISTM). Global ITSM standards such as ITIL(IT Infrastructure Library) and ISO/IEC 20000 are introduced. Especially availability management of De-facto and De-juire standards is concerned with users and customers of IT service. The study presents seven reliability measures, six maintainability measures and two availability measures. These results can be effectively used with a appropriate IT availability management tools such as CFIA(Component Failure Impact Analysis) and SOA(Service Outage Analysis), etc.

• 대한불안의학회지
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• 제14권1호
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• pp.36-43
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• 2018

Objective : There is an increasing number of people are not satisfied with their appearance and shape. Therefore, assessment tools are needed to evaluate the appearance or body shape. This study investigated the reliability and validity of a Korean version of the Body Shape Questionnaire (BSQ). Methods : Participants completed the BSQ, Body Dysmorphic Disorder Examination-Self Report, Eating Disorder Inventory-2, Beck Depression Inventory, Self-Esteem Scale, State-Trait Anger Expression Inventory, and State-Trait Anxiety Inventory. Results : The Korean version of BSQ presented satisfactory test-retest reliability, internal consistency and validity. Exploratory factor analysis yielded four factors as follow: feeling fat, shame and inferiority about one's body shape, attitudes concerning body image perception, and purging behavior. Conclusion : These results show the Korean BSQ exhibits good psychometric properties and can accurately evaluate the body shape concerns among Korean adults.

• Structural Engineering and Mechanics
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• 제3권3호
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• pp.201-213
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• 1995

At present Level 2 and importance sampling methods are the main tools used to estimate reliability of structural systems. But sometimes application of these techniques to realistic problems involves certain difficulties. In order to overcome the difficulties it is suggested to use Monte Carlo simulation in combination with two other techniques-extreme value and tail entropy approximations; an appropriate Pearson's curve is fit to represent simulation results. On the basis of this approach an algorithm and computer program for structural reliability estimation are developed. A number of specially chosen numerical examples are considered with the aim of checking the accuracy of the approach and comparing it with the Level 2 and importance sampling methods. The field of application of the approach is revealed.

• 한국멀티미디어학회논문지
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• 제14권6호
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• pp.802-812
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• 2011

본 논문에서는 문헌연구를 통하여 효과적인 웹 사이트 구축을 위한 신뢰도 요인 7개를 도출하였고, 이를 토대로 웹 사이트의 신뢰도 측정도구인 "Xenu"와 "Yslow"를 이용하여 실증적으로 웹 사이트의 신뢰도를 측정하였다. 실험한 웹 사이트의 수는 국내, 외 12개를 선정하였다. 이들 12개의 웹 사이트에 대하여 신뢰도를 측정한 결과 7개의 측정요인 별로 신뢰도 수준은 다양하게 나타났으며, 효과적인 웹 사이트 구축을 위해서 이들 7개의 측정요인별로 대안을 제시하여 두었다.

• The Journal of Korean Physical Therapy
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• 제21권1호
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• pp.41-48
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• 2009

Purpose: The examine the Reliability and Validity of the modified Emory Functional Ambulation Profile (mEFAP), Tinetti. Gait (TG), Timed Up & Go Tes t (TUG), Comfortable Gait Speed (CGS), Berg Balance Scale (BBS) in assessing gait function and balance in elderly person. Methods: The 45 community-dwelling subjects were participated in this study. Reliability was determined by intra-class correlation coefficient (ICC$_{3,1}$), Bland and Altman method (Standard Error of Measurement (SEM), Smallest Real Difference (SRD)). Results: Validity was examined by correlation the mEFAP, TG, TUG, CGS, BBS. The intra-rater reliability were High (ICC$_{3,1}$ : mEFAP=0.95, TG=0.96, TUG=0.94, CGS=0.96, BBS=0.92) and Absolute reliability were excellent (SEM: mEFAP=1.90, TG=0.21, TUG=0.28 CGS=0.25, BBS=0.52), (SRD: mEFAP=5.26, TG=0.58, TUG=0.77, CGS=0.69, BBS=1.44). There were significant correlations between assessment tool (r=.0.58$\sim$0.78, p<0.01) indicating good validity. Our results provide strong evidence that the assessment tool has good reliability, validity for assessing elderly person undergoing rehabilitation. Conclusion: The gait assessment tool is a useful scale for measuring walking function and recovery in elderly person.

• 대한통합의학회지
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• 제4권2호
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• pp.89-96
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• 2016

Purpose : The purpose of this study was to evaluate inter-tester reliability and Intra-tester reliability about range of motion(ROM) measurement of hip joint with smartphone inclinometer. Method : Six observers performed goniometric and smartphone inclinometer measurements of various hip movements, including both active ROM for flexion, extension, external rotation, internal rotation. Measurements were performed in the right hip of fifty normal subjects. All measures were performed three times for evaluating reliability of observer. Inter- and intra-observer reliabilities were evaluated using the intraclass correlation coefficient(ICC). Result : The results were as follows, inter-observer reliability ICC value showed .948-.974 in smartphone inclinometer. And showed .781-.827 in goniometer. Intra-observer reliability ICC value showed .653-.992 in smartphone inclinometer. And showed .613-.854 in goniometer. Conclusion : Smartphone inclinometer are portable and widely available tools that are mostly reliable and valid for assessing active hip range of motion, with potential use when a goniometer is not available.

• Nuclear Engineering and Technology
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• 제40권5호
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• pp.365-374
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• 2008

Dependability-critical systems, such as digital instrumentation and control systems in nuclear power plants, necessitate engineering techniques and tools to provide assurances of their safety and reliability. Determining system reliability at the architectural design phase is important since it may guide design decisions and provide crucial information for trade-off analysis and estimating system cost. Despite this, reliability and system engineering remain separate disciplines and engineering processes by which the dependability analysis results may not represent the designed system. In this article we provide an overview and application of our approach to build architecture-based, dynamic system models for dependability-critical systems and then automatically generate dynamic fault trees (DFT) for comprehensive, tool-supported reliability analysis. Specifically, we use the Architectural Analysis and Design Language (AADL) to model the structural, behavioral and failure aspects of the system in a composite architecture model. From the AADL model, we seek to derive the DFT(s) and use Galileo's automated reliability analyses to estimate system reliability. This approach alleviates the dependability engineering - systems engineering knowledge expertise gap, integrates the dependability and system engineering design and development processes and enables a more formal, automated and consistent DFT construction. We illustrate this work using an example based on a dynamic digital feed-water control system for a nuclear reactor.

• 대한예방한의학회지
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• 제12권3호
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• pp.1-8
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• 2008

Background : 'Yangsaeng' means health preservation concept in TKM(Traditional Korean Medicine). Health promotion using by traditional medicine was increased recently, but, has little measurement tools in evaluating traditional health care program. This study accomplished to analyze internal consistency reliability by Hong-Cheon survey data Method : Internal consistency reliability analysis within survey items Result : There was little reliability in mind and sexual life yangsaeng factor(Cronbach's alpha value 0.325, 0.273), higher reliability in lifestyle yangsaeng factor(0.718). And reliability was various within items according to age and health insurance type.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2003년도 춘계학술대회논문집
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• pp.278-282
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• 2003

There is a strong industrial demands for the development of light-vehicle to improve fuel efficiency. It is more effective to reduce weight of the parts directly driven by an automobile engine. So the saving in weight of wheels which is operated by an automobile engine improve fuel efficiency more than other parts. There are many step of sheet metal forming in fabricating automotive wheel, so that it is difficult to design process and tools of multi-stage stamping. Traditionally, design process and tools have depended on the experience of skilled workers and it has done by trial and error methods. However, it needs too much costs and time. Taguchi methods has an advantage of the number of required experiments and reliability compared with trial and error method. In this study, Taguchi methods and response surface methods are applied to design process and tools of automotive wheel. As a result, the principal variables are selected and process conditions are optimized.