• Electronics and Telecommunications Trends
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• v.20 no.5 s.95
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• pp.127-138
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• 2005

메신저로 대표되는 IMPP 서비스의 핵심 기술로 프레즌스 프로토콜이 필요하며, SIP기반 프레즌스 프로토콜에 대한 표준화 작업이 IETF SIMPLE WG에서 진행중에 있다. 이러한 프레즌스 서비스는 앞으로 인터넷상에서 핵심 통신 기술로 사용되어 프레즌스기반 통합된 서비스가 많이 등장하리라 예상된다. 그러나, SIP 기반 프레즌스 서비스에서 간단한 상태 정보 등의 변화를 전달하기 위하여 전달되는 프레즌스 메시지 트래픽의 양이 상당히 많은 것이 문제점으로 대두되었다. 이는 대역폭이 제한된 무선 환경의 경우 특히 많은 문제를 야기한다. 따라서, 본 고에서는 SIP 기반 프레즌스 프로토콜 관련 표준화 현황을 통한 기본 개념을 살펴보고 프레즌스 메시지 트래픽을 줄이기 위한 다양한 방법들에 대한 최근 표준화 동향을 살펴보고자 한다.

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 2004.11a
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• pp.471-471
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• 2004

• The Journal of Society for e-Business Studies
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• v.18 no.1
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• pp.191-211
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• 2013

The deployment of social network service(SNS) makes the social network game(SNG) as the new value added service of SNS be popular. But, a few study had identified the reason of this popularity and the elements of SNG. Based on the social presence theory and media richness theory, we had tried to identify three community artifacts (i.e. persistent labeling, self presentation and deep profiling) and two media characteristics(i.e. vividness and interactivity) as the SNG elements in this research. Then we had empirically validated the effect of these elements on the SNGexperience (i.e. social presence, perceived enjoyment) and behavioral intentions (i.e. Continuous usage intention, willingness to pay and loyalty) of the users. We conducted a survey to the actual SNG users. 243 data were collected and analyzed by PLS algorism. The results indicated that the community artifacts mediated by the social presence and media characteristics could significantly affect on the experiences and behavioral intentions. These findings could contribute to identify what element could be the reason of social network game popularity and could also contribute to design more attractive social network game in practice.

• Informatization Policy
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• v.18 no.3
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• pp.25-49
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• 2011

As a way to gather diverse information required for everyday living, the importance of social networks has been growing. Social network services have been spreading rapidly because of diffusion of the Internet, evolution of social network sites, and recognition of the importance of social networks. Recently, the social network service has been evolved based on a new paradigm, Web 2.0, pursuing participation and openness. Following the adoption of Web 2.0 technologies, the social network service allows users to make and maintain new relationships in a more convenient way. Users of the social network service tend to reveal their personal information, and share their ideas and content with other people; in the process they become aware of their existence, feel satisfaction with life and exert influence to others as a member of the society. This study uses higher order factor analysis to analyze factors that affect the intention of using the social network service. A research model was developed with second-order factors including perceived social presence, perceived gratification and perceived social influence. First-order factors are grouped by technical, individual and social factors. Smart PLS 2.0 was used to conduct empirical analysis. The analysis results supported the validity of the research model.

• The Journal of Korean Association of Computer Education
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• v.16 no.4
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• pp.1-11
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• 2013

The purpose of this study is to investigate a structural relationship among elementary students' self-determinant learning motivation, teaching-presence and learning outcomes (learning satisfaction, persistence) in blended learning environment. Participants were 5th and 6th grade students who enrolled in a mathematics learning service. The results showed that self-determinant learning motivation had direct effect on teaching presence, learning satisfaction and learning persistence. Teaching Presence had an direct effect on learning satisfaction and learning satisfaction had an direct effect on learning persistence. Based on the results, proper strategies were recommended to facilitate self-determinant learning motivation and teaching presence before and during learning since they play critical roles for the success of elementary students learning outcomes in a blended learning environment.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.11 no.4
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• pp.91-101
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• 2016

This research focused on searching the specialized factors which affect the cyber universities' performance. This research was approached from three perspective of professor, graduation and employment, and brand image to embody the cyber universities' performance. We drew five factors of contents variety, contents quality, practical orientation of contents, lecture presence, and learning management as the Influencing factors of cyber universities' performance. We proved our research model by analyzing 170 questionnaires which were completed by college students who were studying at cyber universities in China. The results of analysis are showed as below: 1) The level of contents variety can affect the cyber universities' performance; higher level gains better outcomes. 2) The level of contents quality can affect the cyber universities' performance; better quality gains better outcomes. 3) The level of practical orientation of contents can affect the cyber universities' performance; the higher the better. 4) The level of lecture presence can affect the cyber universities' performance; the stronger the better. 5) The level of learning management can affect the cyber universities' performance; the higher the better.

• Environmental and Resource Economics Review
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• v.24 no.3
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• pp.551-572
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• 2015

Given the presence of global warming, the economic impact of climate changes on output sales has been discussed in the literature, but rarely with empirical evidences. In this present study, a simple log-model was employed to identify the economic impacts of weather changes in manufacturing and service sectors in Korea. For this empirical exercise, weather variables including the CDD (cooling degree days) and HDD (heating degree days) were computed using the Korea's meteorological records covering the period 1970-2012. According to estimation results, 26.7% (144 over 539) and 27.9% (64 over 229) of the manufacturing and service sectors, respectively, are found to be weather-sensitive.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• v.9 no.1
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• pp.856-859
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• 2005

There are various clients, information appliances, sensors in a home network environments. These devices can dynamically join a network, convey its capabilities, and learn about the presence and capabilities of other devices- all automatically. Most of a home network middleware provide the protocols that discovery devices and services. In this paper we look about service discovery protocol and security that is offered in Jini, UPnP, SLP, Bluetooth.

• Journal of Service Research and Studies
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• v.13 no.4
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• pp.173-190
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• 2023

In recent times, with the development of virtual convergence technologies, the market for the Metaverse, a digitally virtual space that combines virtuality and reality, is experiencing significant growth. These Metaverses are realizing new value in both reality and virtual spaces through the development of diverse services and content. However, existing research on the Metaverse mostly revolves around its conceptualization and categorization, with limited exploration of intentions to use the Metaverse. Consequently, this study examined the impact of Metaverse service characteristic factors on trust and intention to use within the Metaverse. The results of this study are as follows. First, among the service characteristic factors of the Metaverse, presence, interactivity, and playfulness were found to have a positive impact on Metaverse trust. On the other hand, informativeness was found not to have a significant influence on trust in the Metaverse. Second, Metaverse trust was found to have a positive impact on intention to use the Metaverse. Based on the research results above, this study aims to propose effective communication strategies for activating the Metaverse and developing services within the Metaverse platform.

• Journal of the Korean Society for information Management
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• v.24 no.2
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• pp.105-122
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• 2007

To understand the present status and the development of the digital reference service in Korean public libraries, a nationwide site observation was attempted in 2007. The collected data was analyzed, then compared with the previous analysis based on a 2003 data. For the 404 sites offering digital reference, operational characteristics, such as access level, service mode, link description, policy, web form, and FAQ, are analyzed, Performance analysis focused on the presence of question posting, volume of usage, response rate, and types of the questions, for the data collected for 15 days through question and answer transcript recording. Results reveal findings on the present situation as well as changes over 4 years. Related problems are identified. The conclusion includes suggestions for improving digital reference service.