• The KIPS Transactions:PartB
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• v.11B no.6
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• pp.691-700
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• 2004

This paper proposes a user's mobility based cooperative proxy caching policy for effective resource management of continuous media objects in mobile environments. This policy is different from the existing proxy caching policies in terms of how to exploit users' mobility. In other words, existing caching policies work based on the information about objects by referring to user's requests within a specified domain whereas the proposed caching policy runs by utilizing a number of user's requests across several domains. So, the proposed policy is applicable to random requests in mobile environments Moreover, we also propose a replacement policy based on weights and playback time. To check the efficiency of the proposed caching policy, the proposed replacement policy is run with different size of caching unit object or segment. The result of performance analyze tells what a ratio of user's mobility is are major factors for the efficient operation of the cooperative caching.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.22 no.2
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• pp.381-391
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• 1997

This study aims at designing and calculating of the information index for efficient implementation of the regional information policy. The content and scope of this study are designing the struture of information index, measuring the informatization level in major cities of Korea and inducing rough idea for better performing of Korea information policy. Thereby we calculated tables ofinformation indexon seventy-eight cities in Korea from 1985 to 1994 and also basic strategy for better policy implementation. And we found that every citities share the benefit almost equal in the use of old media but not in that of new media. It can be expected that the bovernment will make a good use to get procedural validity in the course of designing some information policy based upon quantitative data.

• Korean journal of communication and information
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• v.61
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• pp.98-117
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• 2013

In 2009, Korea Communications Commission(KCC) added a new clause which regulates the protection of the media diversity to the Broadcasting Act. Specifically, the provision, Article 35-4, contains the creation of the Media Diversity Committee which is responsible for (1) the measure of TV audience share by media company; and (2) the development of summing up index of the different media influence by the end of 2012. Although the Korean version of diversity index as German KEK was made after a careful consideration based on the necessity to devise a criterion to determine the appropriate level of ownership regulation for the media companies, several issues including the measurement method have been raising the consistent controversy among experts. This study focuses on the evaluation of the media diversity policy by indicating the problems of the devised index and showing the concrete issues of the contention. As the result of the policy delphi-analysis targeted 10 media experts, this study suggest that the Article 35-4 of Broadcasting Act needs to be amend into the realistic and rational directions in well with the tenets of the law.

• Korean journal of communication and information
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• v.51
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• pp.136-155
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• 2010

Media diversity, coupled with the logic of competition in the global media market, has become a fashionable yet unfitting lingo of media policy in Korea. Media diversity has been fenced in the neoliberal economic logic of market competition and so tamed to consumers' free choice in the market. It is within this context that this article attempts to problematize narrowly-defined, market-oriented, and measurement-obssessed funtionalistic approaches to media diversity. In doing so, the article provides a critical overview of various definitions of media diversity. It also reveals how certain definitions, justifications, and measurements are legitimized and normalized in the name of science and objectivity. The core argument is that reflecting a larger neoliberal, deregulatory turn in media policy, media diversity has shifted from the pluralistic principle of democracy to the matter of free market choice or the myth thereof. It then focuses on the ongoing debate between state interventionists and free market liberals over the relationship between media ownership concentration and content diversity. Finally, it puts forth some recommendations as to how media diversity ought to be reconsidered as reformers' cultural politics, rather than marketeers' science, and discusses implications diversity has for deepening Korean democracy.

• Journal of the Korean Society of School Health
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• v.29 no.2
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• pp.63-70
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• 2016

Purpose: The purpose of this study was to find the factors influencing adolescents' adult media engagement. The study is based on Agnew's General Strain Theory (GST) and a micro-systemic perspective. Methods: The study examined 479 middle school freshmen who participated in the fourth wave of the Korean Children & Youth Panel Survey (KCYPS) conducted by National Youth Policy Institute. Data were analyzed through descriptive statistics, factor analysis, and reliability analysis using SPSS 22.0 Ver. Also, hypothesis testing was performed via covariance-based structure equation modeling (CB-SEM) using Amos 21.0 Ver. Results: Strain factors had positive effects on adolescent depression, and depression had a positive effect on adult media engagement. Also, cell-phone dependency had a positive mediation effect between depression and adult media engagement. Conclusion: The study's result identified the factors affecting adult media engagement. Therefore, we suggest intervention programs considering adolescents' strains, depression and cell-phone dependency to improve their health.

• Proceedings of the Korean Society of Health Policy and Administration Conference
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• 2005.12a
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• pp.370-371
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• 2005

• Informatization Policy
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• v.24 no.4
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• pp.3-16
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• 2017

With the development of social media services in the era of Web 2.0, the public opinion formation site has been partially shifted from the traditional mass media to social media. This phenomenon is continuing to expand, and public opinions on government polices created and shared on social media are attracting more attention. It is particularly important to grasp public opinions in policy formulation because setting up educational policies involves a variety of stakeholders and conflicts. The purpose of this study is to explore public opinions about education-related policies through an empirical analysis of social media documents on education policies using opinion mining techniques. For this purpose, we collected the education policy-related documents by keyword, which were produced by users through the social media service, tokenized and extracted sentimental qualities of the documents, and scored the qualities using sentiment dictionaries to find out public preferences for specific education policies. As a result, a lot of negative public opinions were found regarding the smart education policies that use the keywords of digital textbooks and e-learning; while the software education policies using coding education and computer thinking as the keywords had more positive opinions. In addition, the general policies having the keywords of free school terms and creative personality education showed more negative public opinions. As much as 20% of the documents were unable to extract sentiments from, signifying that there are still a certain share of blog posts or tweets that do not reflect the writers' opinions.

• Convergence Security Journal
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• v.10 no.3
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• pp.1-7
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• 2010

One of celebrities using Social media caught public's eye and interest in Korea. Thereby the number of the user has grown rapidly and by last year it had reached to about 770 million. But at the same time, it has brought us social issues such as invasion of privacy, spreading of malicious code, and stealing of ID. To solve these problems, first the government need to establish adequate law and policy. Second, Service provider should remove vulnerability in the security system and filter illegal information. Third, individual user should put more effort to protect their own privacy. This paper will suggest a solution of using the Social media more sound and secure.

• Journal of Digital Convergence
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• v.11 no.9
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• pp.95-102
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• 2013

The purpose of this study is to explain why the social phenomenon of the wisdom of the crowd does not empirically apply. The motivation of this study is to explain the Korean social issue: the Tablo incident. In this study, 50 university students participated in the experiments to assess the impact of social media on the wisdom of crowds effect. We find evidence of a positive wisdom of crowds effect, when respondents are less exposed to media. In contrast, the collective information seems to be negatively distorted by respondents highly exposed to media. This research has strong implication for education policy and theories of social interaction.

• Journal of Korea Technology Innovation Society
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• v.9 no.4
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• pp.865-883
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• 2006

This paper explored the development factors influencing the high growth of internet media industry recently in Korea. Both theoretical model and analytic model were formulated and tested by the results of questionnaire analysis. The factors extracted from five fields were as followings: policy, technology, market, firm, and profitability. Factor analysis was used to test the fitness of the given model, and the hypothesized model was found to be useful to explain the development factors of the internet media industry. The results showed that industry's development was explained by 41.3% for firm level, 37.6% for IT technology and policy, and 21.00/0 for market condition and competition.