• Journal of the Korean Society for Railway
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• v.19 no.3
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• pp.351-362
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• 2016

The purpose of this study is to investigate service factors and relationships affecting customer satisfaction by measuring indexes of the entire set of high-speed railway station facilities and train services. In this study, we collected data from 202 KTX passengers and analyzed the data using the structural equation model (SEM) method. Through exploratory factor analysis (EFA), we found five major service factors, including parking related service (PRS), station convenient facilities related service (SCS), ticketing services (TIS), service within the train (SWT), and inner environments (INE). As result of a hypothesis test, it was found that PRS does not influence SWT, whereas SCS and TIS positively affect train related service. Also, SWT and INE significantly affect the overall service satisfaction of customers. Thus, our findings provide that station facilities and train service experience are important factors that can enhance customer satisfaction.

• Journal of Information Technology Services
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• v.10 no.4
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• pp.1-19
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• 2011

Following the growth of e-Business, there has been a recent increase of interest in promoting Social Business (s-Business) based on Social Network Service(SNS). As the introduction of the Internet brought about the increasing number of its users followed by the growing market of e-Commerce, online games, and e-Learning, the increasing number of SNS users has opened the new markets combining the existing industrial fields with SNS, and it developed into a revenue model beyond the mere sharing of information. Despite such industrial and social environments, understanding of new social business technology from the aspect of business has been insufficient, and the empirical study on participation in the social business has been scant as well. Thus, the main purpose of this study is to investigate the s-Business in detail and to study the factors giving influence to the users' participation in s-Business. This study proposes six variables(Self-Empowerment, Job Relevance, Formation of Social Capital, Relative Advantage, Shared Value, Relationship Specified Investment) and the moderating effects of Psychological Contract as influential factors closely related with s-Business. A total of 362 data from a survey were analyzed by using Structural Equation Modeling(SEM). Result showed that all factors with the exception of Job Relevance have meaningful influence on the intention to participate in s-Business. The implication of the findings suggests to compliment limitations of the existing researches, and to prepare the theoretical foundation for promoting s-Business participation in addition to further suggesting directionality from the view point of the users of the social business-relevant studies.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.22 no.1
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• pp.114-123
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• 2014

Due to the recent aircraft accidents both in Ethiopian airline and Malaysian airline, almost all the media are focusing the importance of the airline safety. Especially, media's eyes and ears are interested in the reasons why Malaysia airline's missing presumed as by either terrorist attack or pilot's mistake. Safety Behaviors of pilot are viewed as the most important human factor issues among researchers. This is because, if it were the case of a commercial airline, pilot's safety behavior would be directly related to the lives of couple of hundreds passengers. This paper considers the antecedents of this safety behaviors as pilot's leadership, pilot's leadership and self-efficacy. This paper has tried to find out which human factors of a pilot would have significant impact on their safety behaviors. According to the empirical research result from SEM (Structural Equation Model), it was found out both the leadership and self-efficacy of a pilot had direct impact on their safety behaviors through safety motivation. Thus it could be concluded that flight crew must follow the instruction of a pilot who had the authority of the flight operation. The managerial implication are discussed in the conclusion part of this paper. As an implication, this paper concluded that it would be necessary to do further research on pilot's leadership and self-efficacy.

• Industrial Engineering and Management Systems
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• v.10 no.2
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• pp.104-108
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• 2011

Technology is one of the major competitive advantages for small and medium enterprises (SME), especially ones operating in the manufacturing sector. Increasing technological capabilities is the basis for SME's business performance improvement. The main problem of SME's is a limitation in the areas of production facilities, technology, and human resources. Some of these constraints cause a decline in business performance and competitiveness of SME's. In this case analysis of technology components has to be carried out to determine the effect of technology on SME's business performance improvement. This study aims to measure the components of technology and to analyze the influence of each technology component on business performance of rattan processing SME's in South Kalimantan. The assessment is carried out on the technoware, humanware, inforware, and orgaware components using the technometric method (UNESCAP). Business performance is measured through a combination of financial and non-financial aspects deducted from financial and marketing figures. Analysis of the influence of technology components on business performance of SME's is done using the Structural Equation Model (SEM) with Partial Least Square software (PLS). Data is collected through interviews and questionnaires from 21 rattan processing SME's in South Kalimantan that produce rattan furnitures. The results show that the value of the contribution of technology (TCC) to the performance of rattan processing SME's in South Kalimantan is still quite low. Analysis of the results shows a direct influence of technoware and humanware on business performance, while orgaware influences business performance indirectly through humanware.

• Journal of the Korean School Mathematics Society
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• v.15 no.3
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• pp.585-603
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• 2012

The purpose of this study is to explore the effects of the contextual variables on mathematics achievement based on TIMSS(the Trends in International Mathematics and Science Study) 2007 using Path Analysis with SEM(a Structural Equation Model). The books in the home, the highest level of education of mother, the highest level of education of father, the ambitions of education, the towards mathematics, the frequence of self study, and the times of homeworks are used as independent variables. The Mathematics achievement is dependent variable. The results of this analysis are as follows. First, parents' the highest level of education, the books holdings at home, and the towards effect the ambitions of education. The Mathematics achievement is indirectly being affected by them. Second, The Mathematics achievement is indirectly being affected by the ambitions of education, the towards mathematics, and the times of homeworks.

• The Journal of the Korea Contents Association
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• v.11 no.12
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• pp.395-402
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• 2011

Recently, Corporate Social Responsibility(CSR) is essential corporate activity to establish favorable corporate image and sustainability management. But it has been a little research that investigate relationship between CSR in corporate level and marketing performance in individual brand level. This paper investigate relationship between CSR activities and brand equity, moderating effect of product quality and service quality on the relationship between CSR activities and brand equity. The SEM(Structural Equation Model) result of this paper shows positively CSR activity to product quality, service quality, and brand equity. Also, the result show moderating effect of product quality and service quality on the relationship between CSR activities and brand equity. Based on these findings, implication and future direction are discussed.

• The Journal of the Korea Contents Association
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• v.16 no.2
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• pp.257-267
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• 2016

This study sought to clarify the relation of children's suicidal ideation and parental depression/life satisfaction, and the mediating effect of the self-esteem in child. With regard to suicidal ideation in children, most studies have used children's depression as predictor, not parental depression. Similarly, parental life satisfaction have not been included in spite of its general influence on child development. Relations among these variables were examined in 512 children and their parents in $7^{th}$ Korean welfare panel data using the structural equation model. Results showed that the maternal life satisfaction was the only significant factor affecting the suicidal ideation of children, no having the mediating effects of the self-esteem in child. The implication of these results and suggestions for intervention and prevention work, and future research are discussed.

• The Journal of the Korea Contents Association
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• v.17 no.8
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• pp.39-52
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• 2017

The purpose of this study was to examine the mediating effects of mobile phone dependency in the relationship between parenting attitude and juvenile delinquency. This study used the secondary data from the $1^{st}$, $2^{nd}$ and $3^{rd}$ waves of the Korean Children and Youth Panel Survey(2010, KCYPS). The data of 2,086 middle school students were analyzed by utilizing Structural Equation Model(SEM). The results are as follows. First, positive and negative parenting attitudes had no direct effects on juvenile delinquency, while positive parenting attitudes had significantly decreased adolescents' mobile phone dependency. In addition, negative parenting attitudes had positive effects on adolescents' mobile phone delinquency. Second, mobile phone dependency was fully mediated by parenting attitudes and juvenile delinquency. On the basis of these results of study, policy and practice implications were discussed to reduce juvenile delinquency by improving parenting attitudes.

• Structural Engineering and Mechanics
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• v.40 no.3
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• pp.431-451
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• 2011

Time delay inevitably exists in active control systems, and it may cause the degradation of control efficiency or instability of the systems. So time delay needs to be compensated in control design in order to eliminate its negative effect on control efficiency. Today time delay in linear systems has been more studied and some treating methods had been worked out. However, there are few treating methods for time delay in nonlinear systems. In this paper, an active controller for a nonlinear and hysteretic building structure with time delay is studied. The nonlinear and hysteretic behavior of the system is illustrated by the Bouc-Wen model. By specific transformation and augmentation of state parameters, the motion equation of the system with explicit time delay is transformed into the standard state space representation without any explicit time delay. Then the fourth-order Runge-Kutta method and instantaneous optimal control method are applied to the controller design with time delay. Finally, numerical simulations and comparisons of an eight-story building using the proposed time-delay controller are carried out. Simulation results indicate that the control performance will deteriorate if time delay is not taken into account in the control design. The simulations also prove the proposed time delay controller in this paper can not only effectively compensate time delay to get better control effectiveness, but also work well with both small and large time delay problems.

• Journal of the Korean Society for information Management
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• v.30 no.3
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• pp.133-156
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• 2013

The purposes of this study are (1) to examine the relationships among attitude on SNS use, subjective norm, perceived behavioral control, and SNS use, (2) to analyze effect of SNS use on bonding network and bridging network, (3) to consider moderating effect of the gender on the relationship between SNS use and Social network. We conducted a survey for 20-30's SNS user. The results of analysis using the Structural Equation Model(SEM) represent that attitude on SNS use, subjective norm, and perceived behavioral control are significant determinants of the SNS use. SNS use affects bonding network and bridging network. An interesting result was observed that the gender had moderating effect on the relationship between SNS use and social network. Based on these results, we suggest theoretical and practical implications of this study.