• 한국산업정보학회논문지
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• 제12권5호
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• pp.183-200
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• 2007

본 연구는 전통적인 오프라인 기업인 항만물류기업이 온라인 영업활동을 도입함으로써 얻을 수 있는 대표적인 기대효익 요인과 마케팅믹스 및 글로벌 경쟁력간의 관계를 분석한다. 대표적인 기대효익 요인으로 신뢰증진, 정보입수, 오프라인 제약 등 세 가지 요인들이 추출되었다. 실증적으로 추출된 이 세 가지의 온-오프라인 시너지 효익요인들이 해당 항만물류기업의 마케팅믹스와 글로벌 경쟁력을 얼마나 향상시키는가를 분석하였다. 구조방정식모형을 이용한 분석 결과, 기대효익 요인들은 해당기업의 마케팅믹스 요인에 유의한 영향을 미치는 것으로 나타났으며, 마케팅믹스 요인은 글로벌 경쟁력에 큰 영향을 미치는 것으로 나타났다. 이러한 결과는 항만물류기업이 글로벌 경쟁력을 증진하기 위한 마케팅믹스 전략을 개발하는데 유용한 방향을 제시하고 있다.

• 디지털융복합연구
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• 제19권8호
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• pp.275-283
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• 2021

본 연구는 형성평가 (FA)와 총괄평가 (SA) 사이의 관계를 검사하여 대학 EFL 수업 평가 개선을 돕고자 수행되었다. 이 연구의 참여자들은 중국의 4년제 대학에서 선택적으로 8주간의 대학 영어 과정을 수강했던 75명의 학부생들이었다. FA 데이터는 온라인 교육 플랫폼인 Mosoteach를 사용하여 자기 보고식 설문 조사에 의해 코스 마지막 과정에서 수집되었다. 연구 결과를 도출하고자, Pearson 상관관계 분석을 통해 FA와 SA(기말고사 및 수행활동 점수)간의 관련성을 SPSS로 분석하였다. 전반적으로 그 두 평가 점수 간 유의미한 긍정적 상관관계가 있다는 것으로 나타났다. 학생들의 단원 평가, 온라인 토론, 브레인스토밍, 신속한 답변, 그리고 과제 수행에서 교수자들의 엄지척 클릭수와도 깊은 상관관계를 보였다. Mosoteach 앱을 통해 관리되는 FA가 학생들의 수업의 학업 성과를 향상 시킬 수 있었다는 결과는 교육 평가 개선을 위한 경험적 기반을 제공할 수 있음을 시사하였다. 이러한 연구 결과에 따라 EFL 수업 평가에 대한 중요성이 설명되었다.

• Management Science and Financial Engineering
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• 제11권3호
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• pp.19-45
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• 2005

Collaborative filtering is one of the most common methods that e-commerce sites and Internet information services use to personalize recommendations. Collaborative filtering has the advantage of being able to use even sparse evaluation data to predict preference scores for new products. To date, however, no in-depth investigation has been conducted on how the data sparsity effect in customers' evaluation data affects collaborative filtering-based recommendation performance. In this study, we analyzed the sparsity effect and used a hybrid method based on customers' evaluations and purchases collected from an online bookstore. Results indicated that recommendation performance decreased monotonically as sparsity increased, and that performance was more sensitive to sparsity in evaluation data rather than in purchase data. Results also indicated that the hybrid use of two different types of data (customers' evaluations and purchases) helped to improve the recommendation performance when evaluation data were highly sparse.

• 한국병원경영학회지
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• 제26권4호
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• pp.38-50
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• 2021

Purpose: The purpose of this study was to identify the relation among affect climate, organizational commitment and organizational performance. Methodology: The survey was conducted through online questionnaires from April 28 to May 1, 2020 for workers in medical institutions. Multiple regression analysis and mediating effects test were performed to identify the influence relationship. Findings: The results, based on a sample of 344 workers in medical institutions, indicate that Positive display climate, Positive experiential climate and Authentic experiential climate are positively related to both organizational commitment and organizational performance. We also found that the lemotional sharing has a partial mediation effect in the relationship that positive display climate, positive experiential climate, and authentic experiential climate affect affective organizational commitment. Practical Implications: Emotional sharing is encouraged for hospital's workers, and the authentic experiential climate contributes to improving work efficiency as well as organizational performance.

• Asia pacific journal of information systems
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• 제19권1호
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• pp.147-165
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• 2009

Virtual community(VC) will increasingly be organized as commercial enterprises, with the objective of earning an attractive financial return by providing members with valuable resources and environment. For example, Cyworld.com in Korea uses several community services to enable customers of Cyworld to take control of their own value as potential purchasers of products and services. Although initial adoption is important for online network service success, it does not necessarily result in the desired managerial performance unless the initial usage is continuously related to the continuous usage and purchase. Particularly, the customer who receives relevant online services and is well equipped with online network services, will trust the online service provider and perceive less risk and experience more activities such as continuous usage and purchase. Thus, how to promote continued online service usage or, alternatively, how to prevent discontinuance is a critical issue for VC service providers to consider. By aggregating a wide range of information and online environments for customers and providing trust to its members, the service providers of virtual communities help to reduce the perceived risk of continuous usage and purchase. Drill down, online service managers realize that achieving strong and sustained customers who continuously use online service and purchase on it is crucial. Therefore, the research into this online service continuance will identify the relationship between the initial usage and the continuous usage and purchase. The research of continuous usage or post adoption has recently emerged as an important issue in the IS literature. Individuals' information systems(IS) continuous usage decisions are congruent with consumers' repeat purchase decisions. The TAM(Technology Acceptance Model) paradigm has been strongly confirmed across a wide range from product purchase on EC to online service usage contexts. The analysis of IS usage based on TAM has proven to be successful across almost online service contexts. However, most of previous studies have focused on only an area (i.e., VC or EC). Just little research has tried to analyze the relationship between VC and EC. The effect of some factors on user intention, captured through several theories such as TAM, has been demonstrated. Yet, few studies have explored the salient relationships of VC users' EC acceptance. To fill this gap between VC and EC research, this paper attempts to develop a research model that extends the TAM perspective in view of the additional contributions of trust in the service provider and trust in members on some factors that affect EC and VC adoption. In this extension, we applied the TAM-to-TAM(T2T) model, and analyzed the transfer effect of trust between these two TAMs. The research model was empirically tested on the context of a social network service. The model was to extend TAM with the trust concept for the virtual community environment from the perspective of tasks. By building an extended model of TAM and examining the relationships between trust and the existing variables of TAM, it is aimed to explain a user's continuous intention to use VC and purchase on EC. The unit of analysis in this paper is an individual user of a virtual community. The population of interest is the individual with the experiences in virtual community. The data for this paper was made available via a Web survey of VC users. In total, 281 cases were gathered for about one week, but there were some missing values in the sample and there were some inappropriate cases. Thus, only 248 cases were finally analyzed. We chose the structural equation analysis to test the hypotheses and it is better suited for explaining complex relationships than the other methods. In this test, AMOS was used to test the Structural Equation Model (SEM). Noticeable results have been found in the T2T model regarding the factors affecting the intention to use of virtual community and loyalty. Our result showed that trust transfer plays a key role in forming the two adoption beliefs. Overall, this study preliminarily confirms the salience of trust transfer in online service.

• International Journal of Internet, Broadcasting and Communication
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• 제12권3호
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• pp.116-124
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• 2020

The advantage of the distance learning universities based on the 4th Industrial Revolution is that anyone can conveniently take lectures anytime, anywhere on the web. In addition, research has been actively conducted on the effect of light color and temperature control upon student performance during online classes. However, research on how the conditions of subjects, lighting colors, and music selection improve the degree of a student's concentration during online lectures has not been completed. To solve these problems in this paper, we have developed automatic analysis system SW for the weak subjects of learners by applying intelligent analysis algorithm, have proposed and simulated music therapy and art therapy. Moreover, It proposed in this paper an algorithm for an automatic analysis system, which shows the weak subjects of learners by adopting intelligence analysis algorithms. We also have presented and simulated a music therapy and art therapy algorithms, based on the blended learning, in order to increase students concentration during lecture.

• Journal of Information Technology Applications and Management
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• 제12권4호
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• pp.71-92
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• 2005

As the Internet establishes and reinforces connections between people, virtual community is becoming one of considerable business model. We believe that benefits of the virtual community go to both customer and vendor organizing virtual community. Despite the explosive growth of virtual communities on the Internet, empirical research has been focused to study the issues related to characteristics of virtual community The objective of this study is to enhance the understanding about virtual communities as an e-business model by Customer Relation Management and by empirically validating their effect on the performance of website. Through path analysis, we find support for relations behavior influence the online commitment. we also find that the online commitment enhance the organization citizenship behavior. Finally, we discuss several theoretical and practical Implications, and suggest limitations for research and future research issue.

• Journal of Electrical Engineering and Technology
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• 제13권6호
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• pp.2344-2353
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• 2018

A coupled recursive total least squares (CRTLS) algorithm is proposed for parameter estimation of permanent magnet synchronous machines (PMSMs). TLS considers the errors of both input variables and output ones, and thus achieves more accurate estimates than standard least squares method does. The proposed algorithm consists of two recursive total least squares (RTLS) algorithms for the d-axis subsystem and q-axis subsystem respectively. The incremental singular value decomposition (SVD) for the RTLS obtained by an approximate calculation with less computation. The performance of the CRTLS is demonstrated by simulation and experimental results.

• 전기학회논문지P
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• 제58권4호
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• pp.483-489
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• 2009

Electrolytic capacitors are used in variety of equipments as smoothening element of the power converters because it has high capacitance for its size and low price. Electrolytic capacitors, which is most of the time affected by aging effect, plays a very important role for the power electronics system quality and reliability. Therefore it is important to estimate the parameter of an electrolytic capacitor to predict the failure. This objective of this paper is to propose a new method to detect the rise of equivalent series resistor(ESR) in order to realize the online failure prediction of electrolytic capacitor for DC output filter of power converter. The ESR of electrolytic capacitor estimated from RMS result of filtered waveform(BPF) of the ripple capacitor voltage/current. Therefore, the preposed online failure prediction method has the merits of easy ESR computation and circuit simplicity. Simulation and experimental results are shown to verify the performance of the proposed on-line method.

• Journal of information and communication convergence engineering
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• 제18권2호
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• pp.82-87
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• 2020

This paper discusses how to design a game server that is scalable, adaptable, and re-buildable with components. Furthermore, it explains how various implementation issues were resolved. To support adaptability, the server comprises three layers: network, user, and database. To ensure independence between the layers, each layer was designed to communicate with each other only via message queues. In this architecture, each layer can have an arbitrary number of threads; thus, scalability is guaranteed for each layer. The network layer uses input/output completion ports(IOCP), which shows the best performance on the Windows platform, it can handle up to 5,000 simultaneous connections on a typical entry-level computer, despite being built with a single-threaded user layer. To completely separate the database from the game server, the SQL code was not directly embedded in the database layer.