• The Journal of Society for e-Business Studies
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• v.15 no.4
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• pp.181-195
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• 2010

The participation and share between personal users are the driving force of Web 2.0, and easily found in blog, social network, collective intelligence, social bookmarking and tagging. Among those applications, the social bookmarking lets Internet users to store bookmarks online and share them, and provides various services based on shared bookmarks which people think important.Delicious.com is the representative site of social bookmarking services, and provides a bookmark search service by using tags which users attach to the bookmarks. Our paper suggests a method re-ranking the ranks from Delicious.com based on user tags in order to provide personalized bookmark recommendations. Moreover, a method to consider bookmarks which have tags not directly related to the user query keywords is suggested by using tag network based on Jaccard similarity coefficient. The performance of suggested system is verified with experiments that compare the ranks by Delicious.com with new ranks of our system.

• The Journal of Korean Association of Computer Education
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• v.9 no.1
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• pp.11-18
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• 2006

Many web-based learning systems have been developed and used widely. But it is known that web-based courses have higher drop out rate. Prior studies in classroom-based courses have shown there is a high correlation between student satisfaction and retention. This paper examines the developed web based self-regulated learning system and analyze self-regulated learning factors. We have derived key factors and their relationship that affect student satisfaction in web-based learning. The key factors are Self-evaluating, Goal setting & Planning, Seeking information, Seeking social assistance and Reviewing records. We found the key factors will help retention in web-based learning.

• Journal of Information Technology Applications and Management
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• v.18 no.3
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• pp.73-89
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• 2011

More and more employees are implementing the use of emerging Web 2.0 tools such as blogs, wikis, social networks, etc in workplaces. However, their attitudes towards adoption of Web 2.0 tools in workplaces still lack theoretical support. The purpose of this study aims to provide a conceptual examination of the determinants that influence the intention to use Web 2.0 applications in workplaces in Korea. To achieve this objective, this study selected the theory of reasoned action (TRA) as a theoretical basis to explain variation in behavioral intentions. Structural equation modeling was employed to analyze data collected from 269 workers distributed in 5 companies in Korea. In addition, we classified respondents into extroverts and introverts and delineated the different factors for these two types of respondents that affect their intentions to use Web 2.0 tools in workplaces. The findings of this research could provide a theoretical foundation for academics on the validation of technology adoption. This research will also serve as a guideline for service providers in designing the Web 2.0 services.

• The KIPS Transactions:PartA
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• v.10A no.5
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• pp.551-558
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• 2003

As the use of computers and internet service has increased fast, various web-based coursewares for the educational purpose have been devoloped. However, the development of web-based coursewares for old-aged adults is far from satisfactory. Since most existing web-based coursewares are designed for the youth, they are not proper for old aged people to use confidently. In this paper, we analyse psychological, social and physical characteristics of old aged adults and propose the starategy for designing web based coursewares for them. Then, We apply the design strategy to develop the web-based courseware in Excel subject and analyse the effect of the design strategy by means of questioning and answring.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.15 no.5
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• pp.1708-1727
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• 2021

In the advent of the twenty-first century, human beings began to closely interact with technology. Today, technology is developing, and as a result, the world wide web (www) has a very important place on the Internet and the significant task is fulfilled by Web services. A lot of Web services are available on the Internet and, therefore, it is difficult to find matching Web services among the available Web services. The recommendation systems can help in fixing this problem. In this paper, our observation was based on the recommended method such as the collaborative filtering (CF) technique which faces some failure from the data sparsity and the cold-start problems. To overcome these problems, we first applied an ontology-based clustering and then the k-nearest neighbor (KNN) algorithm for each separate cluster group that effectively increased the data density using the past user interests. Then, user ratings were predicted based on the model-based approach, such as singular value decomposition (SVD) and the predictions used for the recommendation. The evaluation results showed that our proposed approach has a less prediction error rate with high accuracy after analyzing the existing recommendation methods.

• Journal of Digital Convergence
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• v.11 no.12
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• pp.785-791
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• 2013

This study, in the perspective of universal design, newly suggests UD-WCAG 2013 for the evaluation of job information sites used by the silver generation. Using this, 13 senior clubs run by social welfare corporations chosen by the central and local government for the silver generation job information provision organizations to analyze the compliance status of web accessibility. The web compliance status analysis was done through a self-assessment tool from Korea Agency for Digital Opportunity and Promotion and UD-WCAG 2013. Although both analyses showed that there weren't differences according to region, the general level of compliance was shown as low. In the UD-WCAG 2013's 7 major categories the part about errors was shown providing appropriate solutions, but in the other parts it was shown that the all 13 websites were being run with insufficient consideration of the social and physical characteristics of the silver generation.

• Journal of the Korean Society for information Management
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• v.18 no.3
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• pp.265-284
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• 2001

The aim of this study was to discover the correlation between users cognitive style and their attitude towards evaluating the system. Postgraduate students cognitive styles were defined as Verbaliser/Imager and Wholist/Analytic, and the functionality and ease of learning features of a Web-based OPAC(Online Public Access Catalogue) system were evaluated using a combined evaluation methods: interviews for the preliminary survey, a questionnaire far the central data collection, and a psychometric approach for the judgement of students cognitive style using Ridings CSA(Cognitive Style Assessment) tool. Forty-four postgraduate student volunteers responded and data was analysed using SPSS(Statistical Package for Social Science) for Windows. The statistical analysis of each feature of the evaluation, the correlation between the variables, and the features were explored using Pearsons correlation coefficients(r). In exploring the effects of the cognitive styles of individuals, this study has failed to reveal a significant (P < 0.05) correlations in the interactive Web-based OPACs evaluation. It could be said that the contribution of cognitive styles to evaluating Web-based OPACs is likely to be weaker than that of non-cognitive (or demographic) variables.

• Journal of the Korea Society of Computer and Information
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• v.10 no.2 s.34
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• pp.31-38
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• 2005

The web is expected to cause the lot of its utilizing as a means of computer instructed learning and recently the applying instance on the web is more increasing in the education. From educational perspectives. the web-based instruction is much superior to any other medium in the view of interaction and greater to the amount of transmitted information. The various learning contents of WBI program can make students feel more excited and interested in learning activities. Also the creative talent and application abilities of the learner are able to be developed by mixing various sorts of multimedia materials up such as moving pictures. graphics and sounds. In this study, a WBI courseware learning program for the problem solving was designed and Proposed on the base of the theory of constructivism for the subject of social science in the 6th grade of elementary school. The experimental results showed that the learning accomplishment of an experimental class was much better than that of an existent class.

• The Journal of Korean Association of Computer Education
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• v.22 no.3
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• pp.67-78
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• 2019

The purpose of this study is to explore information ethics issues based on academic big data from Web of Science (WoS) and to provide implications for information ethics education in informatics subject. To this end, 318 published papers from WoS related to information ethics were text mined. Specifically, this paper analyzed the frequency of key-words(TF, DF, TF-IDF), information ethics issues using topic modeling, and frequency of appearances by year for each issue. This paper used 'tm', 'topicmodel' package of R for text mining. The main results are as follows. First, this paper confirmed that the words 'digital', 'student', 'software', and 'privacy' were the main key-words through TF-IDF. Second, the topic modeling analysis showed 8 issues such as 'Professional value', 'Cyber-bullying', 'AI and Social Impact' et al., and the proportion of 'Professional value' and 'Cyber-bullying' was relatively high. This study discussed the implications for information ethics education in Korea based on the results of this analysis.

• Journal of Internet Computing and Services
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• v.20 no.4
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• pp.103-111
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• 2019

Due tothe popularity of personal web-casting 'Food Web Casting' program, the present study aims to examine its effects on real life. The study conducted a survey with Korean college students. Results from a survey of 256 participants showed that first, the most salient reason for watching 'Food Web Casting' was gratification for killing time and gratifications for food entertainment, information, vicarious, and para social interaction are followed. Second, vicarious gratification, killing time gratification, and vicarious gourmandism gratification had a positive effect on Food Wed Casting programs viewing time, while it is not found for effects of gratifications for information and pro-social interaction. Third, it is found that Food Wed Casting programs viewing had effects on viewing happiness and negative perception of fat people. However, it did not have an effect on frequency of food delivery service. Based on these findings,implication, limitations, and topics for future research are discussed.