• Proceedings of the Korea Association of Information Systems Conference
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• 2005.05a
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• pp.19-34
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• 2005

본 연구는 불확실하고 덜 검증된 인터넷 쇼핑몰 환경에서 거래당사자간의 심장역할을 하는 신뢰의 선행요인을 확인하고, 신뢰와 지각된 위험, 태도, 구매의도간의 관계를 실증분석 하였다. 똔 연구모형을 검증한 결과 신뢰의 선행요인일 것으로 예상했던 이해타산 기반의 믿음, 구조적 보장, 상황적 규범, e-벤더에 대한 친숙함이라는 4가지 요인 중 구조적 보장, 상황적 규범, e-벤더에 대한 친숙함은 신뢰에 영향을 미치는 요인으로 확인되었다. 선행요인을 기반으로 구축된 신뢰는 지각된 위험을 낮추고 낮아진 지각된 위험은 고객의 호의적인 태도에 영향을 미칠 것으로 기대했지만, 실증분석 결과를 보면 신뢰가 지각된 위험은 낮추지만, 지각된 위험이 태도에 직접적으로 영향을 미치지 않는 것으로 나타났다. 즉 신뢰와 지각된 위험은 부(-)의 관계가 확인되었고, 지각된 위험과 태도의 관계는 통계적으로 유의성을 찾기가 힘이 들었다. 또한 신뢰는 호의적인 태도에 긍정적인 영향이 확인되었으며, 호의적인 태도 역시 구매의도에 긍정적인 영향을 미치는 것으로 확인되었다. 신뢰가 태도를 매개로 구매의도에 영향을 미칠 뿐만 아니라 신뢰가 태도에도 직접적으로 영향을 미치는 관계도 확인되었다.

• Journal of the Korean Data and Information Science Society
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• v.25 no.2
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• pp.365-371
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• 2014

Association rule of the well-studied techniques in data mining is the exploratory data analysis for understanding the relevance among the items in a huge database. This method has been used to find the relationship between each set of items based on the interestingness measures such as support, confidence, lift, similarity measures, etc. By typical association rule technique, we generate association rule that satisfy minimum support and confidence values. Support and confidence are the most frequently used, but they have the drawback that they can not determine the direction of the association because they have always positive values. In this paper, we compared support, basic confidence, and three kinds of confidence measures useful for classification model building to overcome this problem. The result confirmed that the causal confirmed confidence was the best confidence in view of the association mining because it showed more precisely the direction of association.

• The Journal of the Korea Contents Association
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• v.12 no.9
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• pp.293-310
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• 2012

The purpose of this paper is to explain and identify how services offer-related characteristics of services providers such as service competence, reliability, and responsiveness have an effect on cognitive trust and customization characteristics of services providers has influences on affective trust. And it is to explain and identify how cognitive trust has an effects on affective trust and loyalty, and how affective trust has influence on loyalty in services setting such as apparel services of search attribute, hair services of experience attribute, and dental services of credence attribute. A survey study was conducted to collect the data with consumers who have experience purchase or search on services in apparel services, hair services, and dental services. Analysis of structural equation modeling with AMOS 18 and SPSS win 19.0 was performed to test the research hypothesis. The results of the study are as follows: First, responsiveness characteristics of service providers has an effect on cognitive trust, which in turn influences on affective trust. But there was on effect on customer loyalty by cognitive trust and affective trust in apparel service setting. Second, service competence characteristics and reliability characteristics of service providers have effect on cognitive trust, and customization characteristics of service providers has influences on affective trust, and then both of them, in turn, was effect on customer loyalty in hair service setting. Third, reliability characteristics of service providers has effects on cognitive trust and customization characteristics of service providers has influences on affective trust, and then cognitive trust has effects on customer loyalty, but there was no effects on affective trust by customer loyalty.

• Nuclear Engineering and Technology
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• v.26 no.4
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• pp.600-610
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• 1994

원자력산업계에서는 원전 계측제어계통의 디지털화를 위해 많은 노력을 기울이고 있으나, 원자력산업의 특수성인 시스템 안전성 확보에 필요한 소프트웨어 개발기준과 규제방법이 정립되지 못하고 있다. 뿐만 아니라 디지털 계측제어계통의 핵심 기반기술인 고신뢰도 소프트웨어 개발 방법론이 확립되지 못하여 소프트웨어 공통모드고장 문제, 정량적인 소프트웨어 신뢰도 보장 문제 등이 논란의 대상이 되고 있다. 이와 같이 원전 계측제어계통 디지털화 성공을 위해서는 소프트웨어 신뢰도 확보가 관건이며 고신뢰도 소프트웨어 확인 및 검증 기술 개발이 절실히 요구된다. 본 기술보고에서는 디지털 계측제어계통 소프트웨어에 대한 규제요건을 소프트웨어 신뢰도 보장을 위한 개발자, 사용자, 규제자 사이의 합의 기준측면에서 분석하였다. 또한 최근의 미국 원자력규제위원회의 디지털 계측제어계통 소프트웨어에 대한 규제방법과 규제동향을 살펴보았으며 마지막으로 고신뢰도 소프트웨어 개발과 확인 및 검증 방법, 규제 요건, 규제 방법 등에서 공통적으로 고려해야 할 기술적 측면의 현안과 이의 해결을 위한 연구 현황등을 파악하였다.

• Review of KIISC
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• v.17 no.4
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• pp.50-55
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• 2007

전자거래 환경 하에서 거래 당사자들간의 신분 확인 및 신뢰 구축은 매우 중요한 문제이다. 이러한 문제에 가장 현실적, 효과적 해결책으로 제시되고있는 것이 PKI기반의 신뢰구조이다. 그러나 기존의 계층적 신뢰구조는 광범위한 전자거래환경의 요구조건을 만족시키지 못하고 있다. 이러한 문제를 해결하기 위하여 각국에서는 상호인증과 상호인정 관련 많은 연구와 대안을 제시하고 있다. 그러나 지금까지의 연구는 신뢰 구조의 형성과 CA간의 상호 연동에만 치중하였을 뿐 최종 사용자의 신뢰의 판단이나 요구사항의 실시간 확인과 같은 의사결정에 직접 관련된 문제에는 소홀히 하였다. 여기에서는 최종사용자의 에이전트와 중계에이전트를 사용하여 실시간 확인기능의 제공과 신뢰보드를 이용하여 상호인정관련 신뢰구조의 확립을 제공하고자 한자. 이는 상호인증과 상호연동의 정책적, 기술적 장벽을 해소하는데 많은 도움을 제공할 것이다.

• 한국노년학
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• v.29 no.1
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• pp.117-134
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• 2009

The purpose of this study was designed to develop an questionnaire for healthy aging. The subjects of this study were total 335 people who participated in regular exercise and went to welfare centers in Seoul. The validity and reliability were tested for verifying the developed questionnaire for healthy aging. The data were collected between June 12, 2006 and October 27, 2006. The mean, standard deviation, kurtosis, skewness, reliability, exploratory factor analysis and confirmatory factor were analyzed for statistical purpose using by SPSS-Win 12.0 program. The results were as follows; First, to obtain content validity, the results of previous research and the value system responses were submitted to a judgement group. Second, the results of the factor analysis of the 20 items making up the questionnaire were classified into the following 3 factors; physiological health(6 items), cognitive-mental health(6 items), social-support health(8 items). Third, the reliability of the questionnaire for healthy aging was 0.891(Cronbach's alpha). In the factor analysis Cronbach's alpha correlations for the 4 factors ranged from 0.642 to 0.885. Fourth, the results of confirmatory factor analysis, all the index values(NFI, RFI, CFI, Delta 2 IFI) were close to 1. Thus, this questionnaire demonstrated good reliability and validity and therefore it was an appropriate measurement of healthy aging.

• Journal of the Korean Data and Information Science Society
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• v.25 no.4
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• pp.857-868
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• 2014

Data mining is the representative analysis methodology in the era of big data, and is the process to analyze a massive volume database and summarize it into meaningful information. Association rule technique finds the relationship among several items in huge database using the interestingness measures such as support, confidence, lift, etc. But these interestingness measures cannot be used to establish a causality relationship between antecedent and consequent item sets. Moreover, we can not know association direction by them. This paper propose causally confirmed association thresholds to compensate for these problems, and then check the three conditions of interestingness measures. The comparative studies with basic association thresholds, causal association thresholds, and causally confirmed association thresholds are shown by simulation studies. The results show that causally confirmed association thresholds are better than basic and causal association thresholds.

• Journal of Korea Game Society
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• v.11 no.6
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• pp.53-60
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• 2011

Since the importance of software reliability for game service increases continuously, the reliability evaluation becomes very important. This research performed an experiment which was intended to analyze the effect of software verification and validation, a representative activity of the software development process, on the software reliability. The results from the experiments provided the reliability evaluation based on the development process (e.g., Bayesian Belief Network based reliability estimation) with very useful bases.

• Journal of Convergence for Information Technology
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• v.8 no.2
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• pp.67-75
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• 2018

We sought to develop a multi-dimensional tool for measuring and understanding nurse fatigue. The participants were 301 nurses working in four hospitals in Seoul, South Korea. Basic items were developed after a preliminary literature review, and content validity was verified by a group of experts. The first 52 items from which the fatigue measurement tool was to be developed were tested for construct validity and were reduced via factor analysis to 31 items. Following a confirmatory factor analysis, the items were further reduced to 23 items in three categories: physical, mental, and emotional. A confirmatory factor analysis found the items to be adequate. The fatigue scale was found to have high construct validity and reliability. This scale is expected to serve as a preliminary data-gathering tool to assess the level of nurse fatigue and to develop interventions to alleviate it.

• Korean Journal of Culture and Social Issue
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• v.23 no.1
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• pp.75-96
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• 2017

The present research investigated the psychological nature of low levels of trust in Korean society and the role of family expansionism, a cultural psychological factor, in this phenomenon. Specifically, we examined the possibility that Koreans' distrust toward social system is, at least partially, due to high standards for trust, which might be closely related to Koreans' cultural characteristic of family expansionism. In Study 1, the relations between levels of family expansionism, trust standards, and actual levels of trust for parents, judiciary, and politicians were examined among 540 Korean adults. In Study 2, we manipulated levels of family expansionism to examine its effect on trust standards. Results showed that trust standards were higher for politicians than parents. Participants' trust standards for politics were unrealistically high, especially on the responsibility factor. Actual levels of trust for judiciary and politicians were low when the trust standards for these targets relative to trust standards for parents were high. Moreover, the trust standards and levels of trust for judiciary and politicians (relative to those for parents) were positively correlated to levels of family expansionism. In other words, higher levels of family expansionism were linked to higher trust standards and levels of distrust for judiciary and politicians. In addition, Study 2 results showed that trust standards became high when family expansionism was induced. Unlike previous studies which focused on causes of low levels of trust while assuming that Korean society itself is a low trust society, the present research investigated the underlying mechanism behind the seemingly low trust in Korean society.