• Geomechanics and Engineering
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• v.2 no.2
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• pp.71-88
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• 2010

Soil nailing technique is being widely used for stabilization of vertical cuts because of its economic, environment friendly and speedy construction. Global stability and lateral displacement are the two important stability criteria for the soil nail walls. The primary objective of the present study is to evaluate soil nail wall stability criteria under the influence of in-situ soil variability. Finite element based numerical experiments are performed in accordance with the methodology of $2^3$ factorial design of experiments. Based on the analysis of the observations from numerical experiments, two regression models are developed, and used for reliability analyses of global stability and lateral displacement of the soil nail wall. A 10 m high prototype soil nail wall is considered for better understanding and to highlight the practical implications of the present study. Based on the study, lateral displacements beyond 0.10% of vertical wall height and variability of in-situ soil parameters are found to be critical from the stability criteria considerations of the soil nail wall.

• Proceedings of the Society of Korea Industrial and System Engineering Conference
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• 2002.05a
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• pp.31-36
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• 2002

Product Liability(PL) is a legal policy to deal with global competition by improving domestic industrial competitive power and to reduce the cost of defect products. The purpose of this paper is to address the state of the art solutions to dispute on PL, in reality of a frequent occurrence of global product exchange focussing on product safety that is one of the most important functions of PL and to improve solution of the product safety and reliability responsive to PL. To minimize PL exposure, manufacturers should reflect comprehensive product safety and reliability concepts in establishing PL prevention policies. PL prevention policies are composed of administration system, product safety management system, and total quality management system in respect of prevention, safety, and defence.

• International journal of advanced smart convergence
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• v.10 no.3
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• pp.59-65
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• 2021

In this paper, we propose the AI certification standardization activities for systematic research and planning for the standardization of trustworthy artificial intelligence (AI). The activities will be in two-fold. In the stage 1, we investigate the scope and possibility of standardization through AI reliability technology research targeting international standards organizations. And we establish the AI reliability technology standard and AI reliability verification for the feasibility of the AI reliability technology/certification standards. In the stage 2, based on the standard technical specifications established in the previous stage, we establish AI reliability certification program for verification of products, systems and services. Along with the establishment of the AI reliability certification system, a global InterOp (Interoperability test) event, an AI reliability certification international standard meetings and seminars are to be held for the spread of AI reliability certification. Finally, TAIPP (Trustworthy AI Partnership Project) will be established through the participation of relevant standards organizations and industries to overall maintain and develop standards and certification programs to ensure the governance of AI reliability certification standards.

• Journal of Applied Reliability
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• v.9 no.2
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• pp.93-106
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• 2009

GPS(Global positioning system) system is widely used in artificial satellite, ground controlled approach system as well as in end-user environment such as in the automobile. It is exposed to a very diverse environment and consists of many complicated components and therefore needs careful approach to the enhancement of reliability of the item. In this article reliability standards for the GPS system are established in terms of quality certification tests and failure rate tests.

• Proceedings of the Korea Contents Association Conference
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• 2009.05a
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• pp.425-431
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• 2009

The purpose of this study was to examine the change of Korean image, product image, purchase intention and revisiting intention according to winning at the global sport event. The intercollegiate students attending in Korea were selected for the sample of this study. The data were analyzed through t-test, Regression Analysis, Reliability Analysis, Frequency Analysis, Confirmatory Factor Analysis using SPSS 12.0. The conclusions of this research are following; First, there would be significant differences of factors - the Korean image, product image, purchase intention and revisit intention - before and after the global sport events. Second, there would be significant differences of factors before and after the global sport events due to the event involvements.

• Korea Trade Review
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• v.45 no.3
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• pp.1-19
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• 2020

Recently, traditional trade in the global trade market has stagnated in the aftermath of the US-China trade war and the coronavirus (COVID-19) pandemic. However, the global e-commerce market is growing rapidly, presenting a new opportunity for exports. To examine the effect of an online matching and logistics system on reverse overseas direct purchase and the mediating effect of reliability, this study conducted a questionnaire survey on 320 employees in a Korean trade company from March 10 to April 30, 2018. The study model's goodness of fit was tested, and an analysis was performed using the AMOS statistical package. The online matching and logistics system were found to have a positive effect on reverse overseas direct purchase. Furthermore, results revealed that while a country's reliability mediated online matching and reverse overseas direct purchase, it did not mediate the logistics system. These results mean that online matching is affected by a country's reliability in overseas consumers' buying decision process. This study provides implications for the future directions of export companies and national policies to promote reverse overseas direct purchase. Future research including more countries and companies would be able to make further contributions toward the development of the Korean cross-border e-commerce industry.

• Proceedings of the Korean Society for Quality Management Conference
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• 2004.04a
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• pp.272-277
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• 2004

Recently reliability Improvement and certification are considered as important issues by world-wide leading and highly qualified companies in advanced countries. In Korea, from a few years ago, the policy for reliability certification newly has been driven to improve product competitiveness in part and material industry. As yet the reliability certification is local and domestic, it is necessary to develop local certification system to global certification system. Reliability certification system is composed of accreditation body, testing laboratory and reliability assurance. In this paper, we review the reliability certification system and its application in Korea and the current research trends in advanced countries. Finally we propose some suggestions for the eliability certification system to be an international standard.

• IE interfaces
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• v.23 no.2
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• pp.147-155
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• 2010

Reliability allocation is defined as a problem of determination of the reliability for subsystems and components to achieve target system reliability. The determination of both optimal component reliability and the number of component redundancy allowing mixed components to maximize the system reliability under resource constraints is called reliability-redundancy allocation problem(RAP). The main objective of this study is to suggest a mathematical programming model and a hybrid parallel genetic algorithm(HPGA) for reliability-redundancy allocation problem that decides both optimal component reliability and the number of component redundancy to maximize the system reliability under cost and weight constraints. The global optimal solutions of each example are obtained by using CPLEX 11.1. The component structure, reliability, cost, and weight were computed by using HPGA and compared the results of existing metaheuristic such as Genetic Algoritm(GA), Tabu Search(TS), Ant Colony Optimization(ACO), Immune Algorithm(IA) and also evaluated performance of HPGA. The result of suggested algorithm gives the same or better solutions when compared with existing algorithms, because the suggested algorithm could paratactically evolved by operating several sub-populations and improve solution through swap, 2-opt, and interchange processes. In order to calculate the improvement of reliability for existing studies and suggested algorithm, a maximum possible improvement(MPI) was applied in this study.

• The Journal of the Korea Contents Association
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• v.11 no.10
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• pp.449-456
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• 2011

The purpose of this study was to examine the change of Korean image, product image, purchase intention and revisit intention after successful results in the global sport event. A group of intercollegiate students were selected using the purposive sampling method for the study. Statistical methods were used for enhancing validity and reliability for this paper such as t-test, regression analysis, reliability analysis, frequency analysis, descriptive analysis and confirmatory factor analysis. The statistical package programs for this research were SPSS(ver. 12.0) and AMOS (ver. 7.0). The conclusion of this research were; (1) There are significant differences in factors such as Korean image, product image, purchase intention and revisit intention before and after the global sport events. (2) There are significant differences in factors before and after the global sport events when two groups were separated in terms of event involvements.

• International Journal of Reliability and Applications
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• v.12 no.2
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• pp.123-129
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• 2011

Due to restriction of vehicle emissions and high demand for fossil fuels nowadays, car manufacturers around the world are looking into alternative ways in introducing new car model that would vastly captured the market. Thus, Electric Vehicle (EV) has been further developed to take the advantage of the current global issues on price of fossil fuels and impact on the environment. Since car battery plays the crucial role on the overall performance of EV, many researchers have been working on improving the component. This paper focused on the reliability of EV battery which involves recognizing failure types, testing method and life prediction method. By focusing on these elements, the reliability feature being identified and as a result the batteries life will be prolonged.