• The KIPS Transactions:PartC
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• v.9C no.1
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• pp.107-114
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• 2002

In these days, rapid advances of the computer system and the high speed network have made the multimedia services popularized among various applications and services in the internet. Internet live broadcasting, a part of multimedia services, makes it possible to provide not only existing broadcasting services including audio and video but also interactive communications which also expand application scopes by freeing from both temporal and spatial limitation. In the Paper, an interned Personal-live broadcasting server system is developed by allowing individual users to actively create or join live-broadcasting services with such basic multimedia devices as a PC camera and a sound card. As the number of broadcasters and participants increases, concurrent multiple channels are established and groups are to be expanded. The system should also guarantee High Availability (HA) for continuous services even in the presence of partial failure of the cluster. Furthermore, a transmission mode switching is supported to consider network environments in the user system.

• The Journal of Industrial Distribution & Business
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• v.10 no.3
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• pp.45-58
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• 2019

Purpose - The purpose of this study was to investigate the effects of the chatbot's characteristics (ease of use, social presence, playfulness, usefulness) on service value, customer satisfaction and reuse intention when consumers purchased fashion products in the mobile shopping environments. Research design, data, and methodology - Data were collected from Korean consumers from ages 20 to 59 who have experienced using chatbot in a mobile shopping for fashion products. After a pilot survey to 53 customers, the preliminary questionnaire was revised for the final test, and the final questionnaire was administered to 1500 customers. Out of these, 300 were collected. After deleting 48 incomplete ones, 252 questionnaires were used in the statistical analysis. Frequency analysis and exploratory factor analysis using SPSS 23.0 and confirmatory factor analysis and structure equation analysis using AMOS 18.0 were employed for data analyses. Results - First, four factors were extracted for the chatbot's characteristics: ease of use, social presence, playfulness and usefulness. Second, regarding the effect of chatbot's characteristics on service value when purchasing fashion products in the mobile shopping environment, ease of use, playfulness and usefulness of chatbot significantly affected service value. Social presence did not have significant effects on service value. Third, in terms of the effect of the chatbot's characteristics on customer satisfaction when purchasing fashion products in the mobile shopping environment, social presence, playfulness and usefulness of chatbot significantly had an effect on customer satisfaction. Ease of use did not have a significant effect on customer satisfaction. Fourth, service value of chatbot when purchasing fashion products in mobile shopping environment was found to have an effect on customer satisfaction with chatbot. Fifth, service value of chatbot on reuse intention when purchasing fashion products in the mobile shopping environment was found to have an effect on reuse intention of chatbot. Sixth, customer satisfaction with chatbot had a significant impact on the reuse intention of the chatbot when purchasing fashion products in the mobile shopping environment. Conclusions - The present study provide dimensions on the chatbot's characteristics and these may provide helpful data for further studies in this area and for marketers as well.

• Journal of Korea Entertainment Industry Association
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• v.13 no.4
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• pp.217-228
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• 2019

This study was designed to investigate the effect of exercise prescription service on user satisfaction and reuse intention of fitness center users in C region, Gangwon-do. The subjects of this study were 250 fitness center users aged 20 and over. Survey was conducted to examine users satisfaction and reuse intention. The final analysis data is 227 copies and the results are as follows. First, there was a significant difference in sex at the facility of satisfaction of use(t=2.308, p=.022). The marriage showed a significant difference in the price among user satisfaction(t=2.490, p=.014) and reuse intention(t=-1.968, p=.05). Age showed significant differences in the duration of participation(F=7.117, p=.000), frequency (F=6.171, p=.000), and intensity(F=2.791, p=.027). User satisfaction showed significant differences according to price(F=6.171, p=.000), leader(F=3.083, p=.017) and reuse intention(F=2.699, p=.032). There was a significant difference in education groups in terms of duration of participation(F=3.656, p=.007) and frequency(F=3.164, p=.015). leader(F=5.170, p=.001) and price(F=2.899, p=.023) were different in user satisfaction. Jobs showed a significant difference in the duration of participation(F=4.685, p=.000), intensity(F=2.373, p=.023) and reuse intention(F=4.840, p=.000). Monthly income showed a significant difference in user satisfaction(F=4.651, p=.001) and facility(F=2.606, p=.037). Second, there was a significant difference in the duration of participation according to presence or absence of exercise prescription service(t=-4.410, p=.000). There was also significant differences in the user satisfaction(t=-7.951, p=.000), leader(t=5.304, p=.000), facility(t=2.033, p=.043) and reuse intention(t=4.640, p=.000) in terms of the presence of exercise prescription service. Third, in the relation between exercise prescription service and the participation level, there was a significant effect of the leader(β=.221, p=.001) and the price(β=.135, p=.045) of user satisfaction, and the reuse intention(β=.182, p=.007). Fourth, among the user satisfaction influenced by exercise prescription service, facilities(β=.178, p=.005) and leader(β=.497, p=.000) were found to affect reuse intention.

• Electronics and Telecommunications Trends
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• v.32 no.5
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• pp.10-19
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• 2017

A Telepresence service is an advanced video conferencing service at aimed providing remote users with the feeling of being present together at a particular location for a face-to-face group meeting. The effectiveness in this type of meeting can be further increased by automatically recognizing the audiovisual behaviors of the video conferencing users, accurately inferring their level of engagement from the recognized reactions, and providing proper feedback on their engagement state. In this paper, we review the recent developments of such engagement analysis techniques being utilized in various applications, such as human-robot interaction, content evaluation, telematics, and online collaboration services. In addition, we introduce a real-time engagement analysis framework employed in our telepresence service platform for an increased participation in online group collaboration settings.

• 한국경영정보학회:학술대회논문집
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• 2007.11a
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• pp.585-590
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• 2007

기업과 소비자간 일대일 상호작용을 가능하게 하는 전자상거래의 기술적 발달을 통해 소비자에게 더 나은 웹 경험을 제공하기 위해 개인화 서비스를 제공하고 있다. 개인화 추천을 수행하기 위해서는 추천을 받을 사용자와 유사한 다른 사용자들의 선호도를 반영하는 협업 필터링 기법이 많이 활용되고 있으며, 많은 사이트들이 추천을 받은 사용자에게 유사한 사용자들을 보여주어 사회망 연결을 위한 기회를 제공하고 있다. 본 연구에서는 웹 기반 개인화 추천 시스템을 이용하여 사용자에게 효과적으로 제품을 추천하기 위해서, 사회적 실재감(Social Presence)이 추천시스템의 만족도에 미치는 영향에 관하여 연구하고자 한다. 또한, 사회적 실재감을 높이기 위한 방안으로 사회망(Social Network) 데이터의 제시를 통해 다양한 차원의 사회적 실재감과 추천시스템에 대한 만족도 및 신뢰간의 영향관계를 분석한다. 이를 위해 실험집단을 나누어 세 가지 차원의 사회적 실재감을 부여하고, 집단간의 추천 시스템에 대한 신뢰와 만족도간에 차이가 있는지를 분석하였다.

• Proceedings of the Korean Information Science Society Conference
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• 2006.06b
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• pp.259-261
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• 2006

"e" 시대로 대변되는 21세기는 정보화라는 짧은 과도기적인 사회변화 상태를 지나 지식이 새로운 국가 경쟁력으로 평가되는 지식기반사회로 급속하게 이전하고 있다. 이와 같은 현실은 언제(Any-Time), 어디서 (Any-Where), 누구나(Any-One) 지식을 효과적으로 활용할 수 있는 수단으로 e-learning이 교육의 새로운 패러다임으로 각광받고 있다. 하지만 현재의 e-learning은 기존의 오프라인의 교육 운영 형태를 그대로 답습함으로서 전문가에 의해 매뉴얼화 된 프로세스 정보를 매개로 학습활동이 이뤄지고 있으며 서비스제공환경의 제약으로 인해 개인의 참여와 사용자간 참여의 한계에 직면해 있다. 본 논문에서는 기존 e-learning의 문제점을 개선하고자 상호 작용성을 통한 사회적 실재감(Social Presence)을 느낄 수 있도록 차세대 Web인 Web2.0의 적용을 통해 e-learning 활성화 방안을 모색하고자 한다.

• Journal of the Korean Institute of Telematics and Electronics S
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• v.36S no.4
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• pp.23-31
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• 1999

본 논문에서는 Ka 밴드 위성시스템에서 가장 큰 신호감쇠 요인으로 작용하는 강우효과를 분석하고 그 보상 방안으로서 계층형 8-PSK 변조방식을 제안하였다. 동기복조를 가정한 이론적인 BER 성능과 국내 강우 데이터에 근거한 예상되는 수신신호 품질을 분석하고 기존의 계층형 16-QAM 변조방식과 제안한 계층형 8-PSK 변조방식간의 성능을 비교하였다. 강우강도 및 강우감쇠는 대수정규 분포함수를 이용하여 추정하고 수신신호 품질은 서비스 중단 확률, 평균 수신 SNR에 대해 분석하였다. 결론적으로 제안한 계층형 8-PSK 변조방식은 기존의 계층형 16-QAM 변조방식과 비교해서 전반적으로 매우 우수한 성능을 가짐을 확인하였다.

• Korean Journal of Adult Nursing
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• v.22 no.2
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• pp.130-142
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• 2010

Purpose: The purpose of this study was to analyze attitude toward dignified dying of Korean students majoring in human service area. Methods: The Q-methodology which provides a method of analyzing the subjectivity of each item was used. The 34 selected Q-statements from each of 38 subjects were classified into a shape of normal distribution using a 9 point scale. The collected data was analyzed using a QUANL PC program. Results: Four types of attitude toward dignified dying from the subjects were identified. Type I is an expression type for happy emotion, Type II is a dislike type for life prolongation, Type III is a pursuit type for relationship improvement, and Type IV is a perception type for family presence. Conclusion: The results of the study indicate that integrating multi-disciplinary curriculum development related to dignified dying and death education for students majoring in human service area are needed.

• Korean Management Science Review
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• v.34 no.2
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• pp.1-14
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• 2017

Recently, despite the presence of a large number of people with disabilities, facilities and services for the disabled are insufficient in comparison with the advanced countries. Especially, unmanned facilities and devices are not available for disabled people without help. As interest in disabled people increased, the convenient facilities for the disabled person should be legally installed in the public places. Moreover, social consensus formation and technical approaches are being actively pursued. In this paper, we propose a five-step scenario to use an unmanned post office. Based on the proposed scenario, we present the method to improve the accessibility of the user interface of the unmanned facilities. And we present a plan for establishing the short- and medium-term service models. This plan is expected to be highly practicable because it reflects the current situations of Korea Post and analysis result of the domestic and oversea cases.

• Electronics and Telecommunications Trends
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• v.33 no.2
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• pp.48-55
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• 2018

Immersive media, which maximizes the viewer's sense of presence and immersion, has been developed in the form of 3D stereoscopic media and UHD media. Going one step further, VR media, which can provide immersive experiences within an artificially created environment, have recently been considered a type of next-generation media. Within this trend, numerous IT and broadcasting companies around the world are actively investing their time and resources to boost the emerging VR industry. In this paper, we introduce the representative VR media acquisition and broadcasting service technologies that are leading the current VR industry.