• 사료
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• s.58
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• pp.78-82
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• 2012

본회 사료기술연구소는 사료검정기관으로서 혹은 자가품질검사를 위한 성분분석을 위해 분석서비스를 회원사에 제공하는 분석기관으로서 분석능력에 대한 신뢰도 제고와 정도관리를 위한 여러 가지 실적을 대내외적으로 요청받고 있다. 검증된 결과와 신뢰도를 유지하기 위한 노력의 일환으로 국제 Check sample program에 참가하거나 국내외 기관이 참가하는 각종 비교분석프로그램을 주관하고 있다. 본고에서는 당 연구소가 주관 및 참가하는 Check sample program들과 국내외에 널리 알려진 FAPAS 프로그램을 간략히 소개하고 분석결과 평가방법을 비교하고자 한다.

• Proceedings of the KIEE Conference
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• 2008.07a
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• pp.383-385
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• 2008

본 논문은 헤드스페이스 추출에 의한 절연유중 가스분석 결과의 정확도 향상을 위해 여러 가지 인자들을 고려하였으며, 진단결과의 신뢰도 향상을 위해 표준절연유를 직접 제조하여 이에 의한 교정을 통해 분석법의 진단 신뢰도 향상을 제고하였다. 기존의 추출율이 높은 토플러 추출방법에 대한 결과와 Headspace 분석법에 의한 결과를 각각 비교하고, Headspace 추출법에 의한 결과의 정확도 향상을 위해 여러가지 인자들을 고려하였다. 향후 최적 조건을 수립하여 수은에 의한 인체 유해성이 없는 Headspace 분석법으로의 전환을 모색하고자 한다.

• Journal of Korea Water Resources Association
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• v.47 no.4
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• pp.331-342
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• 2014

In water resources planning, to decide proper water supply capacity is a very important task. Once water supply system such as a dam is decided, it will affect whole range of water resources circumstances for a long time. Even though systematic approaches have been implemented since 1980, many problems are still prevail in reality. Especially some issues related to the reliability analysis method used in planning dams in Korea have been persistently brought up. This study is to diagnose problems on the reliability criterion in water supply capacity assessment of water resources systems and discuss a valid method. As a result, the estimates by the different analysis time intervals, in case of the temporal reliability, show no large difference, but there is a large difference when assessment time intervals are differently applied. The volumetric reliability accounts for 2~3% higher than that of the temporal reliability, and resiliency and vulnerability also show large differences by the analysis time intervals.

• Journal of Korea Water Resources Association
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• v.33 no.1
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• pp.15-30
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• 2000

This study is to develop the applied method of reliability analysis to present risk - initial water level relationship in the small reservoir. To determine the reliability, the grasping of uncertainty sources is prerequisited and performance function is formulated. Reliability analysis method is a statistical method and the basic procedure of risk evaluation for overtopping of reservoir is as follows. 1. Define the risk criterion and performance function for the overtopping. 2. Determine the uncertainties of all the variables in the performance function. 3. Perform the risk analysis with suitable risk calculation method. Reliability analysis method such as Monte Carlo simulation(MCS) method and mean value first order second moment(MVFOSM) method are used to calculate the risk for reservoir. Finally, risk - initial water level relationship is established according to return period and it is useful for reservoir operation and safety assessment.ssment.

• Proceedings of the KIEE Conference
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• 2001.07a
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• pp.318-322
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• 2001

본 논문은 뉴로-퍼지 모델의 구조 학습을 이용한 단기 전력 수요 예측시스템에서 예측치별로 신뢰도를 계산하는 체계적인 방법을 제안한다. 예측시스템의 신뢰도를 추정하는 작업은 특히 신경회로망과 같은 경험적 모델을 실제 활용하기 위해서 필수적인 연구로 인식되고 있다. 본 논문에서 제안하는 출력별 신뢰 구간 계산 방법은 지역 표현하는 뉴로-퍼지 모델의 특성을 활용하여 학습된 퍼지 규칙 각각에 대해 신뢰도를 추정하는 Local reliability measure 기법을 사용한다. 제안된 신뢰도 계산이 가능한 단기 전력 수요 예측시스템은 먼저 결정 트리를 이용하여 초기 구조를 생성하고, 이를 초기 구조 뱅크에 저장한다. 저장된 초기 구조 뱅크를 이용하여 뉴로-퍼지 모델을 학습하고, 학습된 퍼지 규칙의 신뢰도를 추정한다. 제안된 시스템의 실효성을 검증하기 위해서 한국 전력에서 수집한 1996년과 1997년의 실제 전력 수요 데이터를 이용하여 한 시간 앞의 수요를 예측하는 모의 실험을 수행하고 실험 결과를 비교 분석한다.

• Proceedings of the Korean Society for Rock Mechanics Conference
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• 2004.10a
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• pp.13-22
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• 2004

본 연구에서는 도심지 지하철 터널을 대상으로 지반공학적 위험요소가 공사비 및 공기에 미치는 영향을 정량적으로 평가하기 위하여 잔여 리스크 개념을 이용하여 조사개소의 증가에 따른 공사비 및 공기의 신뢰도를 분석하였다. 신뢰도 분석결과, 지반조사 개소가 증가함에 따라 공사비 및 공기에 대한 위험도가 축소됨을 확인하였으며, 이러한 결과를 통하여 도심지 지하철 터널에서의 지반공학적 위험도 분석의 유용성을 확인하였다.

• The Journal of Korean Academy of Sensory Integration
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• v.14 no.1
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• pp.1-8
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• 2016

Objective : The purpose of this study was to determine the reliability of Test of Playfulness (ToP) in Attention Deficit Hyperactivity Disorder (ADHD) children. Methods : Twenty ADHD children participated in this study. To determine inter-rater reliability, two raters was evaluated by Test of Playfulness scores and analyzed Kappa coefficient and total agreement and intraclass correlation coefficient (ICC). Results : Total agreement was the range of 75%~95% and the Kappa coefficients was the range of. 45~1.00. Analyzing inter-rater reliability by ICC showed very high reliability: Intrinsic motivation was .96, internal control was .98, suspension of reality was .90, framing was .98, total score was .99. Conclusion : A reliability of Test of Playflness of children with ADHD showed that high. On the basis of this study, it will provide availability for clinical evaluation of children with ADHD, and basic study on the play of children with ADHD.

• The Journal of the Acoustical Society of Korea
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• v.41 no.4
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• pp.410-418
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• 2022

Channel reliability estimation for iterative codes such as turbo codes is very important factor in time varying underwater acoustic channel, an incorrect estimation of channel reliability induced performance degradation. Therefore, this paper presents an optimal channel reliability estimation method for turbo coded FSK signal with rate of 1/3. The estimated BER algorithm is a method that can estimate the reliability of received data by comparing received data and decoded data, and we determine optimal channel reliability by using the method. In order to analyze the performance, the experiment was conducted on a lake in Munkyeong city by moving in the range of 300 m to 500 m. At the result of applying presented method to failed decoding packets, we confirm all packets are decoded successfully.

• The Korean Journal of Applied Statistics
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• v.37 no.1
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• pp.61-72
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• 2024

The purpose of this study is to investigate retest reliabilities in longitudinal study, the same test is administered repeatedly over time. Linear mixed models were used to establish various situations of tests occurred in longitudinal study. Combination of two types of true value and three types of systematic error was considered. In order to apply the models to real longitudinal data, height data from the Berkeley growth study and vocabulary score data from the University of Chicago experimental school were used. Using the mixed model, there is an advantage that the reliability can be determined by selecting the covariance structure of the true value and the error separately. However, in order to properly analyze the reliability, researchers need to consider variations that can occur in measurement, such as characteristics of subject, the test, and the the treatment applied in the study. And the proper model should be selected and the quality of the measurement should be evaluated for each trial.

• The Journal of the Korea Contents Association
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• v.12 no.7
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• pp.394-405
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• 2012

This study is aimed at developing a tool to measuring school police's job performance, and verifying its credibility and validity. This study collected the sample to 250 subjects using a significance collection method to parents of elementary schools school police work. But excluding dishonestly responding data, this used total 210 people for the final analysis. This study executed experts' meeting, exploratory and confirmatory factor analysis, and item analysis to verify reliability, and verification of internal consistency and reliability. This study extracted and confirmed 7 factors for specialization, attitude, program, prevention activity of school violence, effect, basic duty, teaching for school time and home time, and correlation with related people. Through the above research approach and procedure, this study arrived at the following conclusion. First, validity to school police's job performance and measurement tool to job performance is very high. That is, school police's job performance was explored and confirmed through correlation with specialization, attitude, program, prevention activity of school violence, effect, basic job, teaching for school time and home time, and related people, and of them, explanation of attitude is the highest. Second, reliability to the measurement scale for school police's job performance is very high. That is, school police's job performance has high correlation between items, sub-factors, and total scores, and reliability of internal consistency, Cronbach's ${\alpha}$ value, is over .708. Putting them together, measurement scale for school police's job performance is a questionnaire sheet with very high level of validity and reliability.