• Proceedings of the Korea Information Processing Society Conference
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• 2022.11a
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• pp.761-763
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• 2022

코로나19 이후 화상회의 빈도가 높아지면서 줌 피로라는 신조어가 등장할 만큼 상대방을 가까이 마주하며 회의를 진행하는 것이 사람들의 피로도를 상승시키고 있다. 본 논문에서는 얼굴 합성과 이미지 애니메이션을 이용한 아바타를 통해 사용자가 화상회의에 참가할 수 있는 시스템을 제안한다. 사용자와 닮은 개성 있는 캐릭터는 실시간으로 사용자의 표정 및 움직임을 반영하여 화상회의에 적용될 수 있고 채팅과 커뮤니티에서 캐릭터의 이모티콘으로 감정을 표현할 수 있다.

• Journal of the Korea Convergence Society
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• v.8 no.3
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• pp.177-184
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• 2017

The purpose of this study was to explore children and robot interaction in distant language learning environments using three different video-conferencing technologies-two traditional screen-based videoconference technologies and a telepresence robot. One American and six Korean elementary school students participated in our case study. We relied on narratives of one-on-one interviews and observation of nonverbal cues in robot assisted language learning. Our findings suggest that participants responded more positively to interactions via a telepresence robot than to two screen-based video-conferencings, with many citing a stronger sense of immediacy during robot-mediated communications.

• Journal of Information Technology Applications and Management
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• v.17 no.2
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• pp.71-90
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• 2010

Electronic learning(or e-learning) has created hype for companies, universities, and other educational institutions. It has led to the phenomenal growth in the use of web-based learning and experimentation with multimedia, video conferencing, and internet-based technologies. Many researchers are interested in the factors that affect to the performance of e-learning or e-learning services. In this sense, this study is aimed at proposing e-learning system reuse prediction models in which e-learner intention to reuse influence factors(i.e., system accessibility, system stability, information clarity, information validity, self-regulated efficacy, computer self-efficacy, perceived usefulness, perceived ease of use, flow, and parental expectation) affect e-learner intention to reuse positively. A web survey was conducted for the full members of the e-learning education institute A in Seoul, Republic of Korea, an exclusive e-learning company that provides real time video lectures via the desktop conferencing system. The web survey was conducted for 20 days from November 5, 2009, through the e-learning web site of the company A. In this study, three data mining techniques were used : the multivariate discriminant analysis, CART, and C5.0 algorithm. This study was conducted to provide the e-learning service providers, e-learning operators, and contents developers with marketing and management strategies for improving the e-learning service companies, based on the data mining analysis results.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 1997.06a
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• pp.89-94
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• 1997

In this paper, we present a VR-based interface method which provides users more natural, realistic, and interactive communication and collaboration tool. Since most services in the communication systems matches with the services in the real world, the best understanding would be achieved when the communication services are represented in accordance with the services in the real world. However, conventional text-based interface and 2D GUI cannot provide such reality to the users. In this paper, we discuss VR-based interface to overcome such difficulty and introduce one instance of communication system using the VR-based realistic, what we call Virtual Village, which we are currently developing. This application might be applied to education in virtual space, desktop conferencing system, and entertainment such as MUD or the games in the distributed environment, etc.

• Proceedings of the Korean Information Science Society Conference
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• 2005.07b
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• pp.343-345
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• 2005

유비쿼터스 환경에서의 원격화상회의 시스템은 그 시스템을 이용하는 사용자에 따라서 시스템의 실행환경이나 사용자의 디바이스 환경 등 많은 변화 요소를 가지고 있다. 본 논문에서는, 사용자가 가질 수 있는 서로 다른 환경 등에 스스로 적응하여 효과적이고 최적화된 원격화상회의를 진행 할 수 있는 시스템 구조를 제안하며, 이를 이종의 플랫폼에서 구동할 수 있도록 각각의 플랫폼 환경에 최적화된 적응 구조를 동적으로 재구성할 수 있는 방법과 응용프로그램을 제안한다. 또한, 제안시스템의 프로토타입을 실제 구현하여 그 유효성을 확인하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2015.10a
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• pp.1607-1609
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• 2015

정보통신 기술의 발달과 스마트폰의 보급으로 일반 사용자들은 언제, 어디서나 가족 및 주변 사용자들의 모습을 바라보며 통화할 수 있게 되었고, 원하는 영상이나 사진을 감상할 수 있다. 하지만 시각장애인들은 이들을 위한 연구 및 사회적 인프라의 부족으로 인하여 이와 같은 서비스들의 제공 대상에서 늘 제외되어 왔다. 이러한 사항을 개선하기 위하여 본 연구는 시각장애인들을 위한 새로운 방식의 촉각 TV 시스템을 제안한다. 제안하는 시스템은 크게 3D 캡쳐(Capture) 기술, 실시간 전송/스트리밍 기술, 햅틱(Haptic) 장치 및 액츄에이터(Actuator)제어 기술로 구성된다.

• The Journal of Korean Association of Computer Education
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• v.12 no.3
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• pp.31-40
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• 2009

English education taken with native English speakers is very effective, but it is hard to obtain English education with native English speakers in rural schools. In this study, therefore, we supported English education with on-line content and video conferencing with native English speakers. This study worked with one hundred fifty students from six elementary and middle schools equally distributed by city size over three months. This study performed experimental research by T-test comparing of pre- and post-tests of the hybrid model. In our results, the upper group showed greater improvement in understanding while the lower group showed more improvement in writing. In addition, the lower group showed more improvement than the upper group in overall English accomplishment.

• Proceedings of the IEEK Conference
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• 2004.08c
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• pp.600-607
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• 2004

The paper describes the implementation of the video conferencing system using public key infrastructure which is used for user authentication and media stream encryption. Using public key infrastructure, we are able to reinforce the authentication for conference participant and block several malicious hacking while protecting conference control information. The paper shows the implementation of the transportation layer secure protocol in conformity with Korea public key authentication algorithm standard and symmetric key encryption algorithm (RC2, SEED, DES and 3DES) for media stream encryption. The feature of the paper is transportation layer secure protocol that is implemented for protection of information on a user authentication and video conference and the media streaming encryption algorithm also can be envisioned with another block encryption algorithm. The key for media streaming encryption may be safely distributed by the transportation layer secure protocol.

• 한국디지털정책학회:학술대회논문집
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• 2004.11a
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• pp.283-294
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• 2004

Within the rapidly changing environment of global economics, the environment of higher education in the universities & companies, also, has been, encountering various changes. Popularization on higher education related to lifetime education system, putting emphasis on the productivity of education services and the acquisition of competitiveness through the market of open education, the breakdown of the ivory tower and the Multiversitization of universities & companies, importance of obtaining information in the universities & companies, and cooperation between domestic and oversea universities, industry and educational system must be acquired. Therefore, in order to adequately cope with these kinds of rapid changes in the education environment, operating E-Learning Education & company by utilizing various information technologies and its fixations such as Internet, E-mail. CD-ROMs. Interactive Video Networks (Video Conferencing, Video on Demand), CableTV etc., which has no time or location limitation, is needed.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.10 no.4
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• pp.201-207
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• 1985

The technology of Broadband LAN is required to unify, control and manage various infromation devices by sharing resources. This technology is applied for tele-conferencing, tele-control, tele-metering and 2-way CATV etc. besides Computer network by using multiple channels. This paper introduces the technology and cases of Broadband LAN which is the subnet of ISDN and the basis of FA and OA as the key-technology of MAN(Metropolitan Area Network) and WAN(Wide Area Network).