• Management & Information Systems Review
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• v.31 no.1
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• pp.205-219
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• 2012

This study is to understand how why users fail to service and how users use service recovery strategics. This study use equity theory to understand how perceived justices have influence on trust and to identify how trust has influence on service quality. This study used scenario techquie to get user experience of service failure in smartphone application. Scenario is composed of 16 sub scenario and we conducted survey with each case. The results show that interpersonal justice and distributed justice have significantly influence on trust. However, procedural justice has not influence on trust. Service quality is influenced by trust. This paper conclude with statements of implications and limitations of the study results.

• Journal of the Society of Naval Architects of Korea
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• v.28 no.2
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• pp.241-250
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• 1991

The reliability analysis for web frame of tanker is carried out by the probabilistic finite element method combined with the classical reliability method such as MVFOSM and AFOSM which can be used for calculating the probability of failure for the complicated structures in which the limit state equation is implicitly expressed. As random variables external load, elastic modulus, sectional moment of inertia and field stress are chosen and Parkinson's iteration algorithm in AFOSM is used for reliability analysis. By adding only the covariance data of the random variables to the input data set required for conventional finite element method, the present method can easily calculate the probability of failure at every element end as well as the covariances of structural reponses such as displacements at every element end and member forces at every element, even for the complicated ship structure.

• Proceedings of the Korea Concrete Institute Conference
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• 1996.04a
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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.

• Journal of the KSME
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• v.43 no.6
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• pp.58-61
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• 2003

이 글에서는 굴착기의 용접구조물에 대한 필드 하자데이터의 분석과, 용접조인트의 피로이론을 적용한 수명예측, 및 가속수명시험 결과들 사이에 상관관계 분석을 통한 신뢰도 높은 구조물 수명예측 및 검증 프로세스에 관해 소개하고자 한다.

• Journal of the KSME
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• v.55 no.10
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• pp.36-39
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• 2015

이 글에서는 초고온가스로 노심 흑연 구조물의 신뢰성 평가 관련 이해를 돕기 위해 원자력급 흑연의 일반적인 특성, 흑연 구조물의 파손 평가 모델 및 이론, ASME 응력 평가 모델에 대해 기술하고자 한다.

• Computational Structural Engineering
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• v.5 no.4
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• pp.113-124
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• 1992

This study proposes a Load Factors-based Analysis Model of Optimum Reliability for the High way bridge, which is most common type of structural design, and also proposes the theoretical bases of optimum nominal safety factors as well as optimum load and resistance factors based on the expected total cost minimization. Major 2nd moment reliability analysis and design theories including both MFOSM(Mean First Order 2nd Moment) Methods and AFOSM(Advanced First Order 2nd Moment) Methods are summarized and compared, and it has been found that Lind-Hasofer's approximate and an approximate Log-normal type reliability for mula are well suited for the proposed optimum reliability study.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.2 no.3
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• pp.87-99
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• 1982

This study proposes a reliability based design criteria for the R.C. superstructures of highway bridges. Uncertainties associated with the resistance of T or rectangular sections are investigated, and a set of appropriate uncertainties associated with the bridge dead and traffic live loads are proposed by reflecting our level of practice. Major 2nd moment reliability analysis and design theories including both Cornell's MFOSM(Mean First Order 2nd Moment) Methods and Lind-Hasofer's AFOSM(Advanced First Order 2nd Moment) Methods are summarized and compared, and it has been found that Ellingwood's algorithm and an approximate log-normal type reliability formula are well suited for the proposed reliability study. A target reliability index (${\beta}_0=3.5$) is selected as an optimal value considering our practice based on the calibration with the current R.C. bridge design safety provisions. A set of load and resistance factors is derived by the proposed uncertainties and the methods corresponding to the target reliability. Furthermore, a set of nominal safety factors and allowable stresses are proposed for the current W.S.D. design provisions. It may be asserted that the proposed L.R.F.D. reliability based design criteria for the R.C. highway bridges may have to be incorporated into the current R.C. bridge design codes as a design provision corresponding to the U.S.D. provisions of the current R.C. design code.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.27 no.6
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• pp.605-613
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• 2014

Epistemic uncertainty, the lack of knowledge, is often more important than aleatory uncertainty, variability, in estimating reliability of a system. While the probability theory is widely used for modeling aleatory uncertainty, there is no dominant approach to model epistemic uncertainty. Different approaches have been developed to handle epistemic uncertainties using various theories, such as probability theory, fuzzy sets, evidence theory and possibility theory. However, since these methods are developed from different statistics theories, it is difficult to interpret the result from one method to the other. The goal of this paper is to compare different methods in handling epistemic uncertainty in the view point of calculating the probability of failure. In particular, four different methods are compared; the probability method, the combined distribution method, interval analysis method, and the evidence theory. Characteristics of individual methods are compared in the view point of reliability analysis.

• Management & Information Systems Review
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• v.33 no.4
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• pp.99-118
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• 2014

Using the theory of attribution, this study investigates the determinants if controllability and explores underlying dimensions of online information credibility, and then investigates if the credibility of online information influences the users' intention to use the online information for evaluating or judging the involved products. Moreover, as a research attempt to investigate the impacts of online information credibility, this study examines whether the main effect of perceived online information credibility on the intention of using online information to make a decision of purchase is mediated by both perceived risk and perceived usefulness. A total of 287 survey forms were collected from online consumers. We examined reliability by exploring internal consistency of the multiple item scales in the overall sample. Convergent and discriminant validity were also examined for evidence of construct validity. Then, PLS technique was employed to test the research model. As a result of analyzing data from a dataset of 287 responses via PLS technique, it is found that (1) both sources (controllability and stability) of perceived credibility are significantly associated with both perceived risk and perceived usefulness, and (2) perceived risk as well as perceived usefulness partially mediate the link between the two sources of credibility and intention to use. The findings of this study also suggest that the two dimensions of online information credibility influence information recipient's intention to use. Moreover, the online information including descriptions about controllability and stability can trigger potential consumers to perceive risk about consumption of the informed products and services. Therefore, providing online information with highly described controllability and stability can increase not only the credibility of the online information itself, but also the intention to use the online information through perceived risk and usefulness.

• Proceedings of the KAIS Fall Conference
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• 2011.05b
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• pp.572-575
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• 2011

본 연구는 프랜차이즈 본사의 성과에 직접적인 영향을 미치는 가맹점 순응에 대해 관계교환이론 관점에서 살핀 본사와의 갈등과 본사에 대한 신뢰의 영향관계를 실증 고찰한 연구이다. 연구결과는 본사에 대한 신뢰가 갈등과 순응을 완전매개 함을 보여줌으로써 가맹점 관리를 위한 프랜차이즈 본사의 신뢰 구축 필요성에 힘을 실어주고 있다. 이는 문서상 계약에 미처 명기하지 못한 공백에 대한 관계적 지배를 가능케 할 뿐만 아니라 이해의 불일치와 불공정한 힘의 관계로 인한 갈등을 관리하여 상호 호혜적 관계를 가능케 한다는 점에서 대단히 중요하다. 이와 같은 갈등관리로 인한 신뢰의 구축 그리고 가맹점 순응으로 이어지는 관계의 메커니즘을 이론적 논의와 실증분석을 통해 국내 처음으로 규명했다는 점에서 본 연구는 이론적 실무적 공헌이 크다.