• The Journal of the Korea Contents Association
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• v.19 no.5
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• pp.280-286
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• 2019

This study first examines whether the matching principle reduces information asymmetry and verifies the effect on earnings sustainability and information asymmetry. In the presence of information asymmetry between managers and information users, managers can reduce information asymmetry by increasing the quality of earnings. Information asymmetry is measured by the financial analysts' earnings forecast variance. When we look at the results of previous studies, verify whether information asymmetry decreases as the response to the revenue cost increases and whether negative relationship between profit persistence and information asymmetry appears when the response to the revenue cost is high. As a result, firms with high revenue cost response showed a decrease in information asymmetry. The persistence of the earningss from the high earnings-cost response shows that the analysts' earnings forecast dispersion decreases. This means that the better the response to the revenue cost, the better the quality of the earnings and the less the information risk about the uncertainty of the enterprise. This study is different from the previous studies in that it analyzed whether the persistence of the earnings that responded to the high revenue cost reduces the information asymmetry. The results of this study suggest that managers can reduce the information asymmetry by carrying out appropriate revenue - cost responses, which provides important implications for stakeholders who use accounting earnings information.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.18 no.1
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• pp.223-229
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• 2018

This paper proposes a robust technique of image segmentation, which can be obtained if the topological persistence of each connected component is used as the feature vector for the graph-based image segmentation. The topological persistence of the components, which are obtained from the super-level set of the image, is computed from the morse function which is associated with the gray-level or color value of each pixel of the image. The procedure for the components to be born and be merged with the other components is presented in terms of zero-dimensional homology group. Extensive experiments are conducted with a variety of images to show the more correct image segmentation can be obtained by merging the components of small persistence into the adjacent components of large persistence.

• Journal of Convergence for Information Technology
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• v.10 no.1
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• pp.120-127
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• 2020

The purpose of this study was to examine related variables that improve learning outcomes in collaborative learning. Based on literature reviews, emotional intelligence was used as a variable of personal character, communication ability and collective intelligence were used as variables in learning process, and learning satisfaction, and persistence were used as variables of learning outcomes. Data were collected from 3,475 students at A university, and were analyzed using structural equation modeling. The results of this study are as follows: First, it turned out that emotional intelligence had a significant and positive impact on communication ability, collective intelligence, learning satisfaction, and persistence. Second, communication ability influenced collective intelligence and persistence positively. Third, collective intelligence influenced learning satisfaction and persistence positively. Fourth, learning satisfaction had a significant and positive impact on persistence. These findings offer basic data for collaborative learning by revealing the structural relationships among related variables that improve learning outcomes in collaborative learning of college students.

• Journal of the Korea Convergence Society
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• v.10 no.3
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• pp.257-264
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• 2019

The purpose of this study was to analyze the effect of physical education class satisfaction on the college life satisfaction, and academic persistence to provide the basic information for the effective higher education policy increasing the academic persistence. By analyzing a total of 185 surveys from college students that take the physical education class, this study found followings. First, physical education class satisfaction had a significant direct effect on the college life satisfaction(+). Second, college life satisfaction had a significant direct effect on the academic persistence(+). Third, physical education class satisfaction didn't had a significant direct effect on the academic persistence. Fourth, physical education class satisfaction had a significant indirect effect on the academic persistence mediated by the college life satisfaction.

• Journal of Korea Society of Digital Industry and Information Management
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• v.18 no.3
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• pp.43-53
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• 2022

This study analyzed the learning effect on K-MOOC. It was confirmed how the ease and interaction of K-MOOC affects learning satisfaction and Learning Persistence. The results of the study are as follows. First, it was found that the interaction and ease of K-MOOC learners had a positive effect on learning satisfaction. Second, it was found that the ease and interaction of K-MOOC learners had a positive effect on the Learning Persistence. Third, the satisfaction and willingness of learners with prior course experience of K-MOOC learners were high, and there was a significant difference according to the course experience. This study is meaningful in that the effect of actual learning activities was verified for K-MOOC learners. Based on the results of this study, it is necessary to conduct a comparative study on the K-MOOC activation plan and the case of using K-MOOC at each university.

• Proceedings of the Korean Information Science Society Conference
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• 2002.10d
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• pp.49-51
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• 2002

소프트웨어 산업의 급속한 발전과 더불어 소프트웨어의 생산성의 향상과 재사용 측면이 매우 강조되면서 다양한 방법으로 접근이 되고 있다. 특히 J2EE의 EJB 기반의 컴포넌트 개발은 플랫폼에 독립적으로 운용이 가능한 시스템개발에 큰 영향을 미쳤다. 그리고 디자인 패턴의 개념을 도입함으로써 다시 발생될 수 있는 문제점들을 패턴으로 정리하고 해결점까지 제시하고 있어 소프트웨어의 재사용 측면에 발전을 가져오고 있다. 본 논문에서는 여러 디자인 패턴 중 Dual Persistent Entity Bean 디자인 패턴을 이용하여 엔티티 빈을 설계하는데 BMP와 CMP를 동시에 지원할 수 있는 환경을 이용한 모델을 제시하고 있다.

• Proceedings of the Korean Information Science Society Conference
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• 2002.10c
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• pp.127-129
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• 2002

EJB(Enterprise Java Beans)는 웹 응용 서버 스펙인 J2EE(Java2 Enterprise Edition)의 핵심으로서, 비즈니스 로직을 컴포넌트 형태로 작성하여 재 사용성을 높이기 위한 서버 측 컴포넌트 프로그래밍 모델이다. EJB는 컴포넌트를 특성에 따라 일반적인 비즈니스 로직을 나타내는 세션 빈(Session Bean), 데이터베이스에 저장된 정보와 같은 여러 클라이언트에 의해 공유되며 영속 장치에 저장되는 엔터티 빈(Entity Bean) 그리고 JMS 메시지를 처리하는 메시지 드리븐 빈(Message-driven Bean)으로 구분한다. 본 논문에서는 ETRI에서 개발한 E504 EJB 서버에서 엔터티 빈의 데이터베이스 접근을 자동화 해주는 영속성 관리자(Persistence Manager)에 대해 논의한다.

• The KIPS Transactions:PartD
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• v.15D no.4
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• pp.549-556
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• 2008

Web-based Enterprise Intranet System is developed Object-oriented programming language and data management is constructed using RDBMS. Between Object-oriented programming language and RDBMS bring about "Object-Relational Impedance Mismatch" due to heterogeneous paradigm. To solve this kinds of problems commonly use the ORM Framework that it is converting data between incompatible type systems in databases and object-oriented programming languages, uses complex mapping metadata. It causes difficult to develop and maintain because of inflexible in changes. This paper proposed persistence framework that solve the existing complexity of ORM framework and has more flexible in evolution of database table. This persistence framework is unnecessary meta information that connecting with entity of database table and the objects, it offers users convenience of maintenance and it allows far more flexible and affordable systems to be built because of automatically code generation. The result of testing based on the proposed persistence framework with Hibernate, iBATIS, It is similar response time with iBATIS and it has more about three times faster than Hibernate. But iBATIS has problems of mass data processing.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.39B no.10
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• pp.674-683
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• 2014

Multi-hop wireless networks has become common phenomenon according to a development of wireless communications and an increase of usage of wireless link. ARQ is one of the common protocols in link layer and can improve a link performance recovering packet loss in wireless link. However, ARQ cannot sufficient to assure a end-to-end performance because ARQ only manages the ARQ's own link. In this paper, we propose a new retransmission persistence for ARQ in multi-hop wireless network to satisfy the end-to-end performance. The proposed scheme can aware a bottleneck link according to the exchange of link information between ARQs and can support the end-to-end performance by managing a retransmission persistence. OPNET simulator is used to evaluate the performance of the proposed scheme and results show that proposed scheme can improve the end-to-end performance with satisfying a requirement of entire wireless section.

• Journal of The Korean Association of Information Education
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• v.26 no.6
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• pp.517-532
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• 2022

As a result of the this exploratory study the main results show that the factors affecting the satisfaction of non-face-to-face class learning of graduate students in Education were social presence, perceived easy to use, and information service quality. Secondly, the factors affecting the learning persistence were perceived usefulness and social presence, but perceived usefulness's influence was relatively small. Next, it was found that the subjective satisfaction of graduate students of education did not significantly affect their intention to continue learning persistence. Lastly, learning satisfaction and learning persistence had a positive effect on the intention to recommend to others. Through the this empirical analysitics study it demonstrate the factors such as attitudes, feelings, and friendliness toward non-face-to-face online classes perceived by graduate students in Education.