• 한국산업정보학회논문지
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• 제14권5호
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• pp.227-237
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• 2009

오늘날 인터넷을 기반으로 한 다양한 온라인 서비스가 제공되고 있으며, 최근에는 웹 2.0을 기반으로 사용자가 제작하는 콘텐츠, 즉 UCC(user created contents)가 각광을 받고 있다. 그러나 사용자의 직접 참여를 기반으로 급속히 확산되고 있는 UCC 이용에 대한 연구는 아직 부족한 실정이다. 본 연구에서는 UCC의 특성과 사용자의 지각된 유용성, 플로우, 이용의도 간의 구조적 관계에 대하여 분석하고자 한다. 이를 위하여 기존의 문헌연구를 통하여 UCC 특성의 하위 차원으로서 시스템, 콘텐츠, 사용자 특성으로 구분하고 제시된 특성들을 이용하여 실증조사를 실시하였다. 사용자들의 UCC 활동을 통하여 나타나는 UCC 특성과 지각된 유용성, 플로우, 이용의도와의 관계를 분석하기 위하여 이용의도 모형(SEM: Structural Equation Model)을 이용하였다. 이러한 실증연구 방법을 통하여 보다 효과적인 UCC의 운영을 위한 실무적 함의를 제공하였다.

• Structural Engineering and Mechanics
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• 제54권4호
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• pp.809-827
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• 2015

In this paper, seismic energy response of inelastic steel structures under earthquake excitations is investigated. For this purpose, a numerical procedure based on nonlinear dynamic analysis is developed by considering material, geometric and connection nonlinearities. Material nonlinearity is modeled by the inversion of Ramberg-Osgood equation. Nonlinearity caused by the interaction between the axial force and bending moment is also defined considering stability functions, while the geometric nonlinearity caused by axial forces is described using geometric stiffness matrix. Cyclic behaviour of steel connections is taken into account by employing independent hardening model. Dynamic equation of motion is solved by Newmark's constant acceleration method in the time history domain. Energy response analysis of space frames is performed by using this proposed numerical method. Finally, for the first time, the distribution of the different energy types versus time at the duration of the earthquake ground motion is obtained where in addition error analysis for the numerical solutions is carried out and plotted depending on the relative error calculated as a function of energy balance versus time.

• 아태비즈니스연구
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• 제3권2호
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• pp.8-15
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• 2012

Mobile Entertainment is the new era in mobile communication. Mobile Entertainment service is a combination of games, music, videos, chatting and telecommunication which has created a wide market in India. There is a variation between male and female customers towards Mobile Entertainment services. This study is aimed at analyzing gender impact of attitude, subjective norm, perceived behaviour control intention and behaviour towards mobile entertainment services. The Theory of planned Behaviour (TPB) provided a framework. Total 566 male and 376 female mobile users of different age groups participated in the research. The data analysis was conducted in three-stages. First, reliability tests were performed. Upon satisfactory results, confirmatory factor analysis (CFA) is used to analysis convergent, concurrent and discriminant validity of the model. Once the model was validated Structural Equation Model (SEM) Multi-group analysis is used to find the impact of gender behaviour towards Mobile entertainment services. The results of the study confirmed that the model is viable in predicting variation in gender impact on mobile entertainment services. The findings have revealed that attitude, perceived behaviour control and intention has a significant impact on behaviour to use mobile entertainment but subjective norm has no significant impact on behaviour to use mobile entertainment.

• 한국도서관정보학회지
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• 제41권2호
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• pp.171-187
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• 2010

이 연구는 국립중앙도서관 디지털도서관(NDL) 정보광장에 대한 고객만족도를 측정하기 위한 구조방정식모형을 설정하고 이 모형에서 이용자와 직원 모두에게 적용할 수 있는 모형을 검증하여, 도서관의 서비스품질과 만족도, 충성도에 대해 이용자의 인식과 직원의 예측 사이의 차이를 분석하고, LCSI의 공식에 따라 디지털도서관 정보광장의 고객만족지수를 산출하였다. 분석 결과 디지털도서관 정보광장의 고객만족을 측정하기 위한 모형은 부분매개모형보다는 완전매개모형이 더 적합하였으며, LCSI의 공식에 따라 고객만족지수를 산출한 결과 디지털도서관 정보광장의 고객만족지수는 75.69점으로 나타났다. 이용자의 고객만족도에 대한 도서관 직원들의 예측을 파악하기 위해 이용자와 동일한 모형을 사용할 수 있는지를 검증한 결과 우수한 적합도를 보여 이용자와 직원에게 모두 동일한 모형을 적용할 수 있음이 밝혀졌다. 이러한 검증결과를 바탕으로 이용자와 직원이 예측한 서비스품질 및 만족도, 충성도를 비교한 결과, 디지털도서관 정보광장 이용자들은 직원이 예측한 것보다 모든 면에서 더 높게 인식하는 것으로 나타났다.

• 정보보호학회논문지
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• 제14권4호
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• pp.61-74
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• 2004

위험분석모델은 정보시스템 보안과 관련된 위험을 자산, 위협, 취약성, 보안통제의 관계를 통해서 설명하는 체계화 된 방법이다. 그러나 위험분석모델의 실증적인 연구가 이루어진 경우는 상당히 드물며, 특히 위험분석모델의 타당성 논의는 거의 없는 실정이다. 구조방정식모델을 적용하여 전자상거래 환경에서 위험분석모델의 타당성에 대한 실증적 분석을 한 결과, 위험의 수준에 영향을 미치는 요인으로 언급되는 위협과 보안통제는 통계적으로 유의한 것으로 나타났다. 본 연구는 전자상거래 이용자의 위험인지에 영향을 미치는 요인을 위험분석 접근법을 이용하여 모델 화하여 검증함으로써 전자상거래 위험에 영향을 미치는 선행요인을 규명할 뿐만 아니라 위험분석접근법을 통한 전자상거래에 대한 새로운 관점에서의 접근을 가능하게 한다.

• Structural Engineering and Mechanics
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• 제43권2호
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• pp.163-177
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• 2012

This paper presents a LMI(linear matrix inequality)-based fuzzy approach of modeling and active vibration control of geometrically nonlinear flexible plates with piezoelectric materials as actuators and sensors. The large-amplitude vibration characteristics and dynamic partial differential equation of a piezoelectric flexible rectangular thin plate structure are obtained by using generalized Fourier series and numerical integral. Takagi-Sugeno (T-S) fuzzy model is employed to approximate the nonlinear structural system, which combines the fuzzy inference rule with the local linear state space model. A robust fuzzy dynamic output feedback control law based on the T-S fuzzy model is designed by the parallel distributed compensation (PDC) technique, and stability analysis and disturbance rejection problems are guaranteed by LMI method. The simulation result shows that the fuzzy dynamic output feedback controller based on a two-rule T-S fuzzy model performs well, and the vibration of plate structure with geometrical nonlinearity is suppressed, which is less complex in computation and can be practically implemented.

• 아동학회지
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• 제32권3호
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• pp.91-105
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• 2011

The purpose of this study was to investigate the relationship between sexual development, sensation seeking traits, exposure to pornographic media, peer conformity, and potential delinquency on the part of Korean middle school students. In order to verify the model, we used structural equation model (SEM) analysis. 603 adolescents were participated in the study. The results were as follows; first, both male and female models goodness of fit and significant paths was proven. Second, it was also found that gender difference existed in the model. The implications of this study and the suggestions for future research were also discussed.

• 한국경영과학회:학술대회논문집
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• 한국경영과학회/대한산업공학회 2003년도 춘계공동학술대회
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• pp.508-515
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• 2003

There are various methods to assess to company's outcome. Among them, the customers satisfaction, which is assessed by customers, is the most important. If the customers satisfaction is measured by the CSI based on the proper reliability and validity, you can apply the result for various marketing methods. Therefore, this study develops a model to assess CSI for an industry, specifically, local automotive industry based on the SEM that is already proven valid through assessing models such as ACSI, KCSI and NCSI. Moreover, this research can be utilized for marketing strategy helping customers to decide as an AHP model, one of the decision making method.

• Structural Engineering and Mechanics
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• 제85권3호
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• pp.315-335
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• 2023

Limited studies are available on the mathematical estimates of the compressive strength (CS) of glass fiber-embedded polymer (glass-FRP) compressive elements. The present study has endeavored to estimate the CS of glass-FRP normal strength concrete (NSTC) compression elements (glass-FRP-NSTC) employing two various methodologies; mathematical modeling and artificial neural networks (ANNs). The dataset of 288 glass-FRP-NSTC compression elements was constructed from the various testing investigations available in the literature. Diverse equations for CS of glass-FRP-NSTC compression elements suggested in the previous research studies were evaluated employing the constructed dataset to examine their correctness. A new mathematical equation for the CS of glass-FRP-NSTC compression elements was put forwarded employing the procedures of curve-fitting and general regression in MATLAB. The newly suggested ANN equation was calibrated for various hidden layers and neurons to secure the optimized estimates. The suggested equations reported a good correlation among themselves and presented precise estimates compared with the estimates of the equations available in the literature with R²= 0.769, and R² =0.9702 for the mathematical and ANN equations, respectively. The statistical comparison of diverse factors for the estimates of the projected equations also authenticated their high correctness for apprehending the CS of glass-FRP-NSTC compression elements. A broad parametric examination employing the projected ANN equation was also performed to examine the effect of diverse factors of the glass-FRP-NSTC compression elements.

• The Journal of Asian Finance, Economics and Business
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• 제7권11호
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• pp.987-998
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• 2020

This study aims to examine OL as a potential mediating variable in the relationship between IT and organizational performance. Organizational learning (OL) has been proposed as the mechanism to accomplish this task. Existing empirical research demonstrates that OL may indeed act as a mediator for the effect of IT on organizational outcomes. Also, existing literature discusses the use of technology in the organization, and the case for OL as the key knowledge process, and the intersection between technology and OL as a knowledge-based means for improving organizational performance. Many studies use a descriptive measure of OL despite the theory suggesting that a normative measure may be more appropriate. This study aims to address these concerns in a setting by using structural equation modelling (SEM) to compare the effectiveness of descriptive and normative measures of OL as mediating variables in knowledge-intensive organizations. Survey results support OL as a mediator between IT and organizational performance in addition to normative measures of OL outperforming descriptive measures. Implications for research and practice are discussed. To test the model, we will apply (SEM) structural equation modeling in the analysis of a moment structures (AMOS) on the empirical evidence collected from 218 Pakistani CEOs and top managers.