• Journal of the Computational Structural Engineering Institute of Korea
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• v.17 no.3
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• pp.251-259
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• 2004

The prediction accuracy of prestress plays an important role in the quality of maintenance and the decision on rehabilitation of infrastructure such as prestressed concrete bridges. In this paper, the Bayesian statistical method that uses in-situ measurement data for reducing the uncertainties or updating long-term prediction of prestress is presented. For Bayesian analysis, prior probability distribution is developed to represent the uncertainties of creep and shrinkage of concrete and likelihood function is derived and used with data acquired in site. Posterior probability distribution is then obtained by combining prior distribution and likelihood function. The numerical results of this study indicate that more accurate long-term prediction of prestress forces due to creep and shrink age is possible.

• Journal of the Korean Society for Library and Information Science
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• v.30 no.4
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• pp.13-38
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• 1996

This study focuses on investigating and analyzing overall information use behavior of the social science researchers. questionnaires were sent to 150 researchers in three major libraries or research institutes in the area of the social sciences, Five hypotheses were tested on the basis of the assumption that there would exist unique characteristics in the information seeking behavior of social science researchers The findings of the study shows that social science researchers prefer monographs and journals: they tend to use current material: the first information source for their research activities is the cited references in the book or journal article : they are likely to delegate literature searching to the librarian, but they tend to conduct direct searching in online setting: in general, they react positively for the rapid change in information environment caused by recent development of information technology, It is emphasized that to design an efficient information system and provide an effective information service in the social science related library or information center, it is essential to consider the major characteristics and attributes of social science researchers in terms of their information use behavior.

• The Journal of the Korea Contents Association
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• v.5 no.5
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• pp.211-218
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• 2005

This paper examines relationships among empowerment, nice delivery levels, and mediated variables. 1 chose the job satisfaction and commitment to the organization. The analysis of mediated effect tested mediation using the three-step mediated regression approach(Baron & Kenny, 1986). Data were collected by 235 full time employees. The results of regression analysis is as follows: First, empowerment of hotel employees affects Job satisfaction. Secondly, empowerment of hotel employees affects commitments to the organization. Thirdly, empowerment of hotel employees affects service delivery levels. The results of three-step mediated regression supported mediated effects between service delivery levels and its antecedents. The result of the study implies that empowerment is a crucial factor in the explanation of service delivery levels and hotel managers are able to motivate employees' service delivery levels by paying more attentions to employees' job satisfaction and commitment to the organization.

• 한국벤처창업학회:학술대회논문집
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• 2017.11a
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• pp.19-25
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• 2017

본 연구에서는 창업가의 역량을 주관적 경력성공과 기업가정신으로 설정하여 창업기업의 성과와의 영향관계에 대한 연구를 진행하였다. 특히, 최근 늘어나는 실업율과 정부의 창업지원 정책의 핵심대상군인 청년들을 대상으로 본 연구를 진행하였다. 일반적으로 청년창업이 어려운 이유 중 하나는 시장이나 사업에 대한 경험이 상대적으로 부족한 청년들이 실무적인 지원 및 실패에 대한 안전장치 없이 창업을 시작한다는데 있다. 하지만 창업교육을 통해 간접경험을 높이고 청년들이 가지고 있는 장점인 새로운 시각과 유연한 사고방식을 충분히 활용한다면, 실패에 대한 확률을 줄이고 혁신기업을 만들 수 있는 가능성은 더 높을 수 있다 하겠다. 최근 몇 년간 정부는 대학생을 포함한 청년층에게 창업 초기자금을 지원하여 청년창업의 활성화에 많은 노력을 해왔지만, 이러한 지원들은 대부분 창업을 시작하는 초기단계에 집중이 되어있다. 창업은 그 성공률이 3~4% 남짓으로 쉽지 않은 일이지만, 그래도 이러한 초기단계의 지원들은 청년들이 창업시장에 많은 참여를 할 수 있는 동인이 되고 있다. 또한, 청년들이 시장에서 자신의 아이디어를 실험하고 사업화하며 혁신을 이루어가는 창업의 과정은 훗날 그들에게 훌륭한 경험과 경력이 될 것이다. 경험을 통한 자신의 경력에 대한 주관적인 평가는 개인의 삶과 업무에 대한 태도에 영향을 미치게 되기 때문에, 청년들의 이러한 경험들은 우리사회에 지속으로 긍정적인 가능성을 만들어 줄 것이다. 본 연구는 창업가의 주관적 경력성공과 기업가정신이 창업기업의 성과에 영향을 미치는 요인들을 확인하기 위한 분석을 수행하였다. 이러한 분석을 통해 창업기업들이 성장을 위해서 개인이 가지고 있는 경력과 경험에 대한 활용을 높여야 하는 근거를 도출하였다. 이러한 근거 도출을 위해 창업가의 경력에 대한 중요성과 업무능력과의 관계에서 영향을 주는 요인을 가설로 설정하였고 이에 대한 검증을 통하여 주관적 경력에 대한 중요성을 확인하였다. 본 연구의 주 목적은 첫째, 창업가의 주관적 경력성공과 기업가정신이 경영성과에 미치는 다양한 요인에 대하여 실증 분석하여 학문적 체계를 마련하고, 둘째, 창업가의 주관적 경력성공과 기업가정신이 경영성과에 미치는 요인을 통계적 방법을 통해 찾아내어 창업지원정책의 평가시스템 개발에 유용한 기초자료를 제공하는데 있다.

• The Transactions of the Korean Institute of Electrical Engineers
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• v.37 no.12
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• pp.903-913
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• 1988

Induced voltage causing disturbances on the communication lines of electric train is dealt with when the AT power supply system is employed. Induction interference is of three types, namely, normal state induced voltage, unusual induced voltage in case of power faults, and noise-induced voltage. Calculation of induced voltages occurring in the AT system is more complicated and extensive than in the BT system. In this paper we obtain an algorithm to calculate the induced voltages on the communication lines in the AT system and an algorithm for the induced current in case of the accident that the line falls to the ground. These algorithms are developed to a package of computer programs and their validity was checked on a simulated system. We supply the measures to protect the communication lines suitable for the AT system and we can also evaluate the protection capabilities. Because of the ability to evaluate the protection measures, this package is expected to be very useful when electric train system is constructed on communication lines near the railroad.

• Journal of Internet Computing and Services
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• v.12 no.5
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• pp.159-170
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• 2011

In procurement auctions, auction frequency and transaction volume per auction have been analyzed as important factors in determining auction performance. However, there is no empirical study on the effect of auction frequency and transaction volume in procurement auction. Current studies mainly focus on bidder behavior analysis and new system design in procurement auction. In the study, we analyze the effect of two factors on relative winning price empirically by using real auction data from MRO procurement outsourcing company in Korea. From the results, we find the winning price is lower when the frequency of auction with same item category is lower. The low frequency of auctions means participating bidders have limited information of previous auctions and they bid their best price to win the current auction due to less opportunity of reopening the auction in near future. The larger purchase amounts of MRO items didn’t results in lower winning price, contrary to our hypothesis. The possible reason is that the price of MRO items already reflects the economy of scales and the increased volume per auction do not cause the further discount of MRO items from the auction.

• Journal of Information Management
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• v.18 no.4
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• pp.98-117
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• 1985

At the present time, the role and importance of information retrieval has greatly increased for two main reasons: the coverage of the searchable collections is now extensive and collection size may exceed several million documents; further more, the search results can now be obtained more or less instantaneously using online procedures and computer terminal devices that provide interaction and communication between system and users. The large collection size make it plausible to the users that relevant information will in fact be retrieved as a result of a search operation, and the probability of obtaining the search output without delay creates a substantial user demand for the retrieval services.

• Informatization Policy
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• v.25 no.3
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• pp.75-94
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• 2018

Today, Software as a Service(SaaS) is being recognized as a key means to enable the innovation of software distribution. Despite the increase in the interest in SaaS, individuals as well as businesses are not yet making an extensive use of it. This research is aimed at identifying and analyzing the antecedents of intentions to use SaaS. We proposed a research model to predict an individual's intention to use SaaS based on the Technology Acceptance Model(TAM). To this end, we conducted a questionnaire survey in which actual software users participated. An empirical analysis has been performed to test the reliability and validity and the hypotheses using SPSS and AMOS software packages. The results of the analysis revealed that functionality, interoperability and economic benefits have positive effects on the intention to use SaaS, while system quality has no significant effect on the behavioral intention. We discussed practical as well as academic implications, and provided research directions.

• The Journal of the Korea Contents Association
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• v.15 no.5
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• pp.55-65
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• 2015

This study suggests the direction of policy making which contributes the visiting intention improvement of satisfaction by evaluation of cultural product between K-Pop and J-Ani. This study of research model are typically estimated within the framework of AMOS and related methods such as EQS and LISREL. The results show that statistically positive relationship among a evaluation of cultural product, a satisfaction and the visiting intention. This study reveals that Korea and Japan need to investigate the improvement of the K-Pop and J-ani. Finally, Korea and Japan should strive attract foreigner.

• Journal of Intelligence and Information Systems
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• v.20 no.2
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• pp.19-38
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• 2014

This study focused on the role of active knowledge seeking (knowledge browsing and knowledge searching) in the context of virtual community of interest. Knowledge seeking is rarely studied as an antecedent in knowledge management (KM) research. Active knowledge seeking is considered as antecedents of sense of virtual community which mediates to knowledge sharing intention and virtual community promotion. Research hypotheses are tested by applying structure equation modeling with survey data from virtual community members in South Korea. Active knowledge seeking behavior was found to be the strong predictor of sense of virtual community, which, in turn, positively affects knowledge sharing intention and virtual community promotion. Implication to practitioners is to understand and accommodate the members' knowledge seeking efforts, who are potential contributors and promoters of the virtual community. Knowledge seeking, knowledge sharing and promoting virtual community are more of human activities than technology and this study extends the understanding of such human activities. By providing a mechanism of how knowledge seeking and sharing could work harmoniously, a virtuous circle with win-win situation could be achieved in virtual communities.