• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 제37회 하계학술대회 논문집 A
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• pp.29-31
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• 2006

The most crucial requirement of a power system is o supply quality electric energy to customers without interrution. This problem is directly related to reliability of power system. Reliability assessment of power system has been an important topic for the past several decades. This paper deals with reliability assessment of a 154kV power substation n KEPCO. In his paper, exponential distribution is used to calculate reliablity index. The failure rate data that are utilited for reliablity index based on the realistic system. Also, FTA(Fault Tree Analysis) is used to compute substation reliablity

• 응용통계연구
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• 제4권1호
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• pp.93-105
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• 1991

본 강의에서는 심리학 및 교육학에서 흔히 활용되는 설문지 또는 시험지 문항들의 신뢰성 분석에 대한 이론을 간단히 소개한다. 아울러 SPSS/PC+의 RELIABILITY 모듈과 SAS의 PROC CORR 등을 이용하여 실제 사례를 분석하고 몇가지 관련된 사항을 토의한다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1996년도 춘계학술대회 논문집
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• pp.305-308
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• 1996

An analyzing method for pressure fluctuation in oil hydraulic pipe network was developed in this study. The object pipe network has multi-branch configuration, and the pipeline of it is composed of steel tubes, flexible hoses. Also, accumulators, orifices and lumped oil volume components are attached on it. Transfer matrix method, in other words impedance method, was used for the analysis. The reliablity and usefulness of the analyzing method was confirmed by comparing and investigating computed results and experimental results got in this study.

• 대한가정학회지
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• 제28권1호
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• pp.141-156
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• 1990

The purpose of this study was to develop 『Korean Maternal Behavior Inverntory』(KMBI). The subjects were 712 mothers of 4th-6th grade elementary school children from 5 urban cities in Korea. Item analysis. Cronbach's α, Pearson's r, Factor analysis, and Percentile norms were conducted for the purpose of the study. The major findings were as follows; 1. By the method of item analysis and factor analysis, 51 items were selected for the scale of maternal behavior. 2. A factor analysis showed 7 factors(Reasoning guidance, Affect, Antliorian Control, Achievement, Overprotection, Active Involvement, Limit Setting) as separated domains from each others. 3. The reliablity coefficient of the scale was ranged from 62 to 81 sufficient to secure reliability. 4. Percentile ranks were drived from the total score and quartiles were calculted for the each of seven factor's scores. The present study presents a potentially highly useful way of measuring maternal behavior of 4th-6th grade elementary school children in Korea.

• 한국융합학회논문지
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• 제9권3호
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• pp.187-201
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• 2018

페이스북 광고 메시지에서 메시지 구성요소의 세 가지 형태인 A문자, B문자+사진, C문자+사진+동영상의 융합형태는 SNS의 주요 속성들에서 어떤 영향의 차이를 보이는가를 연구문제로 설정하였다. 연구절차는 A, B, C 세 가지 Type으로서 모바일에 적용가능한 광고샘플을 제작하여 230명의 피험자들에게 노출시키고, 제1가설에서 SNS의 주요 속성인 정보성, 신뢰성, 유희성, 상호작용성에서 각각 다른 차이를 보일 것인가를 ANOVA, Scheffe 사후분석으로 검증하였다. 제2가설은 SNS 주요 속성요소는 A, B, C 세 가지 광고메시지 융합유형에서 주요 영향력 요소가 무엇인지를 회귀분석으로써 확인하였다. 연구결과 제1가설에서는 A, B, C 세 가지 광고메시지 융합형태에서 유희성과 상호작용성은 A

• 연구논문집
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• 통권22호
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• pp.65-74
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• 1992

This paper aims at calculating optimum design dimensions to minimize the weight satisfied strain and stress intensity of the frame while loading maximum weight into a mechanical press in the static condition. Analysis of the frame was carried out by using the FEM, then the optimum condition was obtained by using these data. As modeling in the finite element analysis has great impact on the reliablity of analysis results, the analyzed object was selected a 150-ton mechanical press of J Company, the part little affected to structural rigidity was simplified, the load condition was considered in the only maximum load, the boundary condition was used by giving symmetric displacement due to symmetric boundary condition, the finite element was applied a linear membrane element. An intermediate processor program applied the normal ANSYS to analyze finite elements was developed, and the design sensitivity was calculated. This program was applied to the optimum design.

• 대한가정학회지
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• 제35권4호
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• pp.199-210
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• 1997

The purpose of this study was to examine whether social support buffers the deleterious effects of strain on life satisfaction of the aged and to provide information for finding out ways of increasing their life satisfaction. The subjects of this study were 252 aged persons living in Kwangju and Joun-nam. The statistics used for data analysis were frequency percentage mean standard deviation reliablity Pearson's correlation multiple regression analysis through the SAS package program. 1) The support score from family was higher than the support from friends and the total point of life satisfaction of the aged was 28.4 which was above the median 24. 2) Social support especially the support from family buffer the negative effect of strain on life satisfaction of the aged. The result indicates that the family remains a supportive system for the aged parents Therefore A program in necessary for aged parents to promote the emotional solidarity between the aged parents and their children.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1996년도 봄 학술발표회 논문집
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• pp.334-339
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• 1996

본 연구의 목적은 불확실성이 내포되어 있는 콘크리트 구조물을 신뢰성 이론에 근거한 보통강도, 고강도 콘크리트에서의 휨모멘트-곡률관계와 하중변위관계를 해석하는데 그 목적을 두고 있다. 또한 기존의 해석방법과 본 연구에서의 해석방법을 비교하고 각 강도별로 기존에 제안된 응력블럭을 가정, 강도별에 알맞은 응력블럭을 검증하고 본 연구의 해석방버벵 대한 타당성을 증명하는 데 있다. 그래서 기존의 문헌을 통하여 공시체 데이터($\Phi$10$\times$20)에 대한 회귀분석을 이용하여 각 강도별로 곡선식을 모델화하여 제안하였고 이 식을 이용하여 불확실성을 내포하고 있는 몬테카롤로 시뮬레이션을 사용하여 내력을 평가하여 기존연구 해석치와 각 응력블럭을 이용한 본 연구에서의 해석치를 비교검토하여 이 해석방법의 타당성을 증명하는데 있다.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 1992년도 가을 학술발표회 논문집
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• pp.79-89
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• 1992

This study is directed to propose a stability analysis and Design Criteria for Bridge Caisson foundations, with Could possibly replace the traditionals W.S.D. provisions of the Current Code, based on the FBOR(Load Factors based on optimum Reliability). The optimum reliability indices(Vertical bearing Capacity : $\beta$opt : 3.19, Lateral bearing Capacity : $\beta$opt= 3.15(ordinary), $\beta$opt : 2.93 (earthquake), Shearing resistance Capacity ; $\beta$opt : 2.87) are Selected as optimal Values Considering our practice base on the Calibration with the current Bridge Caisson foundation design Safety provisions, Load and resistance factors are measure by Using the proposed uncertainties and the Selected optimum reliability indices. furthermore, a set of nominal safety factors are proposed for the U.S.D. design provisions.

• 한국구조물진단유지관리공학회 논문집
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• 제1권1호
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• pp.113-124
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• 1997

Based on the recent developments of the reliability-based structural analysis and design as well as the extending knowledge on the probabilistic characteristics of load and resistances, the probability based design criteria have been successfully developed for many standards. Since the probabilistic characteristics depend highly on the local load and resistances, it is recognized to develop the design criterion compatible with domestic requirements. The existing optimum design methods, which are generally based on the structural theory and certain engineering exprience, do not realistically consider the uncertainties of load and resistances and the basic reliability concepts. This study is directed to propose a optimum design based Expected Total Cost Minimization on two-way slab system which could possibly replace optimum design based traditional provisions of the current code, based on the AFOSM reliablity theory.