• International Journal of Contents
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• 제8권4호
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• pp.78-87
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• 2012

In this paper, we conducted cross-cultural studies on digital images, which is an important element of the user interface. We brought in the schema theory to explain the cross-cultural difference in expressing and perceiving digital images. Participant-ethnography, in-depth interview, and card sorting were conducted to explore how expression and perception of images are influenced by schemas. Our results of qualitative studies indicate that there are differences in schemas between cultures depending on the topic of expression and perception. With these results, we suggest globalization and localization strategies for websites.

• 디지털산업정보학회논문지
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• 제5권4호
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• pp.199-211
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• 2009

The purpose of this study is to elicit influential factors on accepting IPTV services and define the casual relationship between the factors, and "user satisfaction", "re-use intention", "stranger recommendation intention", in an attempt to provide useful guidelines to IPTV carriers, contents providers and equipment makers for their forming IPTV service models and marketing strategies. For this end, the theoretical background of this study has been brought from relevant literature, and theoretical study models have been established by logical reasoning of the interrelation among diverse components. Then, the established models have been analyzed by using statistical packages "SPSS(12.0), LISREL(8.72)". Finally theoretical and practical significance and future study direction have been suggested. To make sure of effective validity of IPTV service adoption models above, empirical studies should be made continuously. And then vertical and horizontal studies at a specific point would show ever-changing causal relationship, helping to promote financial outcome of relevant companies and organizations.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2004년도 ICEIC The International Conference on Electronics Informations and Communications
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• pp.42-46
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• 2004

Mobile IP [9] was introduced to help the mobile user to be contacted with a single IP address even though the point-of-access changes. However, mobile IP creates the so-called 'triangle routing' which makes the delays for data packets longer, as well as creating unnecessary traffic at the home network of the mobile user. To overcome this, Route Optimization (RO) for mobile IP [1] was proposed, which eliminated the triangle routing phenomenon. But [l] requires that the network protocol stack of all existing hosts to change. Privacy is also another matter to be considered. This paper introduces a scheme called Peer Agent scheme to implement RO for mobile IP without requiring existing hosts to change. Method to preserve location privacy while still enabling RO is also considered.

• KIEAE Journal
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• 제7권5호
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• pp.21-28
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• 2007

The studies on eco-village have been focused on the notion of the village and methods to construct it. However, there haven't been enough studies to research changes of the village derived from dwellers of the village. This fact is being one of reasons to deliver many constructions of Eco-Villages being out of balance. Though the dweller is practical user of the village, planning methods concerning user's opinion are not used and even devaluated in the comparison to methods at the beginning of the planning. Thus, this study began to research dwellers' consciousness for Eco-Village and point out problems which can be happen in real life of Eco-Village.

• Journal of Positioning, Navigation, and Timing
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• 제11권4호
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• pp.381-388
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• 2022

In 2021, development of a regional satellite navigation system called KPS was approved. In this regard, various studies are in progress, but there is no published signal model. So, in relation to the user segment, it is necessary to design a user receiver, but there is no information. Therefore, in this paper, we assume a signal model that can be a candidate signal for KPS based on related studies. This signal uses CNAV-2 structure navigation message, truncated Gold code and BPSK modulation. Based on this signal, a simulator is designed that can be used for receiver design later. The simulator consists of a signal generator and a signal transmitter, and is verified using a software receiver and spectrum analyzer.

• 한국문헌정보학회지
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• 제48권3호
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• pp.55-70
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• 2014

다수의 이용자 기반 적합성 기준에 관한 연구가 수행되어 왔지만 여전히 추가 연구의 필요성이 제기되고 있다. 추가연구 수행의 필요성은 다음과 같은 사항의 미비와 관련 된다: (1) 어린 이용자 집단 대상의 연구, (2) 웹 환경에서의 연구, (3) 비적합성기준에 관한 연구 및 관련 시스템과 서비스 개선을 위한 시사점 도출. 이에 본 연구는 KERIS 에듀넷 사이트를 활용하는 40명의 중학교 3학년 학생들의 탐색 및 자료평가 과정을 조사해 적합성 및 비적합성기준을 식별하였다. 연구결과는 16종류의 적합성기준, 8종류의 비적합성기준을 보여주었다. 연구결과를 기반으로 한 제안점은 관련 시스템 및 서비스 개선과 관련된다.

• 한국정보시스템학회지:정보시스템연구
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• 제21권2호
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• pp.1-25
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• 2012

In the field of education in Korea, University Information Disclosure System was conducted forcibly in December 2008 by Ministry of Education, Science and Technology. As a result, information quality provided to the user has been improved dramatically. Based on the preceding studies of information success model, the purpose of this study was to prove empirically three facts on the organization's performance, user's attitude, and gaps between two factors by improvement in the quality of information. To accomplish the purpose, literature review and statistical analysis were done using the university evaluation data published by JoongAng Daily from 2007 to 2011. The results of this study showed that the information quality had positive effect on organization's performance, user's attitude like a reputation, and the gaps between two factors. The results of this study had a great expectation for the role of offering useful insight and information in the field of information system and education.

• 한국멀티미디어학회논문지
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• 제21권7호
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• pp.802-812
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• 2018

Recently, there are several active and vibrant studies on Realistic Media that try to provide the immersion and the presence by adding sensory effects to video. Because existing sensory effects on Realistic Media are produced through experts and automation programs on sensory effects, there is a limit to fill up the gap of user satisfaction which comes from the diversity of cybernauts. In this paper, we propose a method to improve the satisfaction with sensory effects by collecting and analyzing user's response information, and applying the result to the attributes of sensory effects. The proposed method allows you to produce the Sensory Effect Metadata effectively by analyzing users' biometric data and subjective satisfaction with realistic media experience, measuring the weighted value to revise the effects, and applying to the attribute of sensory effect. The experimental result shows that the proposed method improves the satisfaction with realistic content by generating the revised Sensory Effect Metadata in response to user's experiential feedback information.

• 한국산업정보학회:학술대회논문집
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• 한국산업정보학회 2000년도 추계공동학술대회논문집
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• pp.265-283
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• 2000

Factors influencing the success or failure of information systems(IS) have been discussed in many literature. However, little theoretical development or empirical research has examined effectiveness of hospital information systems(HIS) This study set the research model of influencing factors and consequences of HIS through theoretical studies based on Management Information Systems, and then empirically tested several hypotheses related to this model. Based on a sample of 274 respondents who participated in dealing with the HIS, this research used a multiple regression analysis to test the research model. The results of this study are as follows: system quality, information quality and support of top management are statistically significant influence on user satisfaction. Service quality is a partially significant influence on user satisfaction. Hypothesis 5, proposing that computer self-efficacy would relate positively to user satisfaction, was not supported by the questionnaire results. Based on these results, system quality, information quality and support of top management are very important variables for IS success. And the study's findings indicate DeLone and McLean's model is correct in proposing that the indirect relationship between influencing factors and organizational effectiveness, mediated by user satisfaction, is an important one.

• Journal of Information Science Theory and Practice
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• 제2권3호
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• pp.6-17
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• 2014

The purpose of this study is to examine to what extent the context in which people interact with online information affects people's credibility perceptions. In this study, credibility assessment is defined as perceptions of credibility relying on individuals' expertise and knowledge. Context has been characterized with respect to three aspects: Context as user goals and intentions, context as topicality of information, and context as information activities. The data were collected from two empirical studies. Study 1 was a diary study in which 333 residents in Michigan, U.S.A. submitted 2,471 diary entries to report their trust perceptions associated with ten different user goals and nine different intentions. Study 2 was a lab-based study in which 64 subjects participated in performing four search tasks in two different information activity conditions - information search or content creation. There are three major findings of this study: (1) Score-based trust perceptions provided limited views of people's credibility perceptions because respondents tended to score trust ratings consistently high across various user goals and intentions; (2) The topicality of information mattered more when study subjects assessed the credibility of user generated content (UGC) than with traditional media content (TMC); (3) Subjects of this study exerted more effort into making credibility judgments when they engaged in searching activities than in content creation. These findings indicate that credibility assessment can or should be seen as a process-oriented notion incorporating various information use contexts beyond simple rating-based evaluation. The theoretical contributions for information scientists and practical implications for web designers are also discussed.