• Journal of the Korean Data and Information Science Society
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• v.20 no.6
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• pp.1075-1083
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• 2009

The scientific research method went through construction of hypothesis and collection of data by experiment or observation and abstracting the hypothesis based on the experience which uses the data. The statistical methodology plays an important role in this process. The method which acquires a data becomes an initial process of abstraction and a survey research using structured questionnaires is a basic tool. After the data is acquired, the high-class statistical techniques such as the regression analysis and the linear structural equation model are used to abstract a hypothesis. By the way, from time to time the concepts which have become abstractive do not help us to understand an actual phenomena, rather it is need to extract some knowledge from questions themselves. In this article, we review the well known statistical methods providing the ways of finding core questions which possibly answer a researcher wants to know. We deal with course evaluation data as an example and try to set up the strategy for improving course evaluation.

• The Journal of the Korea Contents Association
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• v.13 no.6
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• pp.246-259
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• 2013

The purpose of this study was to investigate the differential effects of the determinants of life satisfaction among the elderly and a variety of health, economic, leasure activity, social support and psychological variables were comprehensively examined as determinants of life satisfaction among the elderly. The sample of this study was composed of 347 old people participating in the leasure activity programs operated by 10 facilities for the aged in Seoul. Data were collected using structured questionnaires and analyzed employing structural equation modelling technique as a main data analysis method. It was found that subjective health condition, subjective economic level, productive and consumptive leasure activities, spouse and children support, self-esteem and extraversion had positive effects on life satifaction among the elderly. The theoretical and practical implications of this study were discussed and the directions for future research were suggested.

• Journal of the Korean Society for Marine Environment & Energy
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• v.1 no.1
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• pp.56-65
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• 1998

An oil spill model, Green Sea Ranger(GSR) based on trajectory and fate modeling of spilt oil behavior is introduced. The various physical models on weathering processes are reviewed and those adopted by GSR are described. A database for currents, which is necessary for the real-time simulation of oil spill, is generated on the south sea of Korea. The real-time prediction of tidal currents in the South Sea of Korea is carried out. Four major constituents (M₂, S₂, K₁, O₁ tide) are employed in the prediction, and those angular speeds and phases are determined from the astronomical arguments. The harmonic constants of the constituents are computed by solving shallow-water tide equations. The GSR has user-freiendly GUI and flexible framework which makes it easy to expand the database for sea environments in Korean coastal waters. The GSR is validated by the simulation of O-Sung oil spill caused by a grounded oil tanker in coastal sea near Maemol-do. The simulated trajectory is compared with observed one and it is shown that the GSR gives reasonable estimation on spilt oil bahavior.

• The Journal of the Korea Contents Association
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• v.14 no.7
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• pp.435-448
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• 2014

The purpose of this study was to investigate the effects of distributive and procedural justice on organizational effectiveness and the mediating role of supervisor trust among the MICE industry employees. For the study, data were collected from 303 MICE industry employees in metropolitan area by self-administered questionnaires. Collected data were analyzed using structural equation modeling technique. The results of this study showed that organizational justice had effects on organizational effectiveness measured in terms of job satisfaction, organizational commitment and organizational citizenship behaviour of MICE industrial employees and that supervisor trust mediated the relationship between organizational justice and organizational effectiveness. Based on the results of this study, the theoretical implications of the findings were discussed and directions for future research were advanced.

• Korean Journal of Childcare and Education
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• v.11 no.6
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• pp.1-18
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• 2015

The purpose of this study was to investigate the effects of the home environment of young children on their language and the quality of peer competence. The current study hypothesized that when the home environment of young children is desirable, the young children would be more likely to develop better language skills, which in turn, predict greater peer competence and lower levels of aggression and withdrawal in the interaction with peers at child care settings. The study used data of 1,802 families who have been participating in the Korean Child Panel Study since 2008. The results revealed that there was a significant relation from both positive home environment and better language skills to more positive play interaction and reduced play disruption and play disconnection. Home environment significantly predicted better expressive language development of young children and, in turn, higher scores on expressive vocabulary tests predicted greater peer competence and less negative play behaviors rated by child care providers. Statistical tests proved that the mediational effects of language skills between home environment and toddler's peer relationships were statistically significant. The study results emphasized the importance of language development in children's expanding social settings and the supporting role of rich and stimulus home environments in children's development.

• Journal of Digital Convergence
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• v.16 no.6
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• pp.143-150
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• 2018

This study used a learner acceptance model to investigate the effect of SNS characteristics on user satisfaction and visit intention. A structured self - report questionnaire was administered to 172 college students. Structural equation modeling was applied using SPSS 18.0 and AMOS 22.0. The results of this study are as follows: First of all, the usefulness of informativeness did not affect the usability of the extracted SNS characteristics, and the usability did not affect usability. (+) Influence of. The characteristics of SNS can be utilized as a marketing tool to increase customer 's use and influence the customer' s intention to visit and further to create customers. In the future, various age groups will have to be surveyed. By examining the correlation between the degree of food companies' involvement in SNS and consumer visits, one can see how SNS activities of restaurant companies affect marketing activities.

• Journal of Digital Convergence
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• v.18 no.11
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• pp.169-176
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• 2020

With widespread use of information technologies the importance of information security has been heightened. Security policies which deal with fundamental direction of information security are critical elements of information security management. Numerous studies have been conducted on users' intention to comply security policies. They were based on various theoretical foundations and the theory of planned behavior(TPB) was the most frequently used. This research employed one of the quantitatively synthesizing meta-analytic techniques called Two-Stage Structural Equation Modeling to investigate factors influencing information security policy compliance behavior based on TPB. Analysis results indicated that all three factors of TPB were significantly influencing the behavioral intention. Moreover, the overall fit indices of structural model exhibited satisfactory level.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.10 no.6
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• pp.89-98
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• 2015

The purpose of this study was to investigate the effect of the Government's entrepreneurial support policy(educational support, financial support and marketing support) on entrepreneurship and entrepreneurial intention. This study examined educational support, fund support and marketing support as the The Government's entrepreneurial support polity variables and innovativeness, progressiveness and risk-taking as entrepreneurship variables. The sample of this study was composed of 331 existing and potential entrepreneurs selected from the national panel of a online web survey research firm. Data were collected using self-administerd structured questionnaires and analyzed employing structural equation modelling techniques. This study found that three entrepreneurship variables(innovativeness, progressiveness and risk-taking) had positive direct effects on entrepreneurial intention and that three Government's entrepreneurial support policy variables (educational support, financial support and marketing support) had positive direct effects on entrepreneurship, whereas these three variables had positive indirect effects on entrepreneurial intention. The theoretical and practical implications of the findings were discussed and the directions for future research were suggested.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.30 no.6
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• pp.92-100
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• 2002

In this study, transonic/supersonic nonlinear flutter analysis system of a complete aircraft including forced harmonic motion pf control surfaces has been effectively developed using the modified transonic small disturbance (TSD) equation. To consider the nonlinear effects, the coupled time marching method (CTM) combining computational structural dynamics (CFD) has been directly applied for aeroelastic computations. The grid system for a complex full aircraft configuration is effectively generated by the developed inhouse code. Intransonic and supersonic flight regimes, the characteristics of static and dynamic aeroelastic effect has been investigated for a complete aircraft model. Also, nonlinear flutter flight simulations for the forced harmonic motion of control surfaces are practically presented in detail.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.39 no.4
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• pp.314-320
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• 2011

In this work, optimization of two-stage shock absorption system for lunar lander has been carried out. Because of complexity of impact phenomena of shock absorption system, a 1-D constitutive model is proposed to describe the behavior of shock absorption system. Quadratic polynomial regression meta-model is constructed by using a commercial software ABAQUS with the proposed 1-D constitutive model, and sequential approximate optimization of two-stage shock absorption system has been carried out along with the constructed meta-model. Through the optimization, it is verified that landing impact force on lunar lander can be considerably reduced by changing the cell size and foil thickness of honeycomb structure in two-stage shock absorption system.