• Journal of the Korea Institute of Information and Communication Engineering
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• v.19 no.10
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• pp.2457-2464
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• 2015

Distributed Networked Control Systems (NCSs) through wireless networks have a tremendous potential to improve the efficiency of various control systems. In this paper, we define the State Update Interval (SUI) as the elapsed time between successful state vector reports derived from the NCSs. A simple expression of the SUI is derived to characterize the key interactions between the control and communication layers. This performance measure is used to formulate a novel optimization problem where the objective function is the probability to meet the SUI constraint and the decision parameter is the channel access probability. We prove the existence and uniqueness of the optimal channel access probability of the optimization problem. Furthermore, the optimal channel access probability for NCSs is lower than the channel access probability to maximize the throughput. Numerical results indicate that the improvement of the success probability to meet the SUI constraint using the optimal channel access probability increases as the number of nodes increases with respect to that using the channel access probability to maximize the throughput.

• Journal of the Korean GEO-environmental Society
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• v.4 no.1
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• pp.5-10
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• 2003

The solids and the fluids in porous media have a relative velocity to each other. Due to physically and chemically different material properties and their relative velocity, the behavior of saturated porous media is extremely complicated. Thus, in order to describe and clarify the deformation behavior of saturated porous media, constitutive models for deformation of porous media coupling several effects need to be developed in frame of Arbitrary Lagrangian Eulerian(ALE) description. The aim of ALE formulations is to maximize the advantages of Lagrangian and Eulerian elements, and to minimize the disadvantages. Therefore, this method is appropriate for the analysis of porous media which are considered for the behavior of the solids and the fluids. For this reason, mass balance equations for saturated porous media are derived here in ALE description frames. ALE formulations of mass conservation for the solid phase and the fluid phase are expressed. Then, linear momentum balance equation for porous media as multiphase media is expressed.

• The Journal of Society for e-Business Studies
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• v.15 no.4
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• pp.219-244
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• 2010

The charged broadcasting market has been becoming very competitive to get the limited media consumers since IPTV was introduced to the market. This research analyzed the competition among interactive broadcasting media. We employed the niche theory for comparing IPTV with Cable TV and Satellite TV, which are two major existing broadcasting media. For employing the niche theory, we focused on the gratification-opportunity features of the media caused by the consumers' gratification sought: ease of use, interactivity, variety of content, and economic feasibility. The results showed the extent to which media are utilized, the extent to which each pair of media are perceived as similar, and the competitive superiority between each pair of media on each dimensions. Finally, we examined the competition structure of IPTV and other broadcasting media, and proposed the competitive strategy for IPTV to get an advantages.

• Korean journal of communication and information
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• v.22
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• pp.211-247
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• 2003

This study explored how Korean immigrants education, length of stay and English fluency affect their political socialization, mediated through traditional news media and the news Web use. Political socialization included political knowledge, interest, and participation. The media usage patterns included U.S. news media, U.S. news Web, Korean news Web, and Korean news Media use by Korean immigrants in the United State. This study found as follows. First, education, length of stay, and English fluency indirectly increased political socialization(political knowledge, interest, and participation) through their relationship with U.S. news media use. Second, U.S. news Web played a potentially important role in Korean immigrants' political socialization by increasing their political interest. Third, Korean news media partly contributed to Korean immigrants' political socialization by increasing their political interest. Fourth, Korean news Web use did not contribute to Korean immigrants' political socialization in terms of political knowledge, interest, and participation at all. In conclusion, this study found that traditional news media's role was more important than news Web's one in the process of immigrants' political socialization to the host society.

• Journal of the Korean Society for Library and Information Science
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• v.37 no.2
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• pp.27-56
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• 2003

The school library media specialists offer the users assistance in using information resources and instructional media by assessing, evaluating and selecting the most appropriate materials for the present educational situation in school. The format of the information media and the scope of the media center collection have constantly been changed by information technology. Media specialist has to know the selection criteria to be capable of providing any media format in the technological society, particularly of providing instruction software(courseware), multimedia, hypermedia and digital reference service to maintain the school library media center as one of the user oriented educational information centers. This paper presents the selection criteria for the instruction media by media format as one of the useful guidelines to the media specialist.

• Journal of the HCI Society of Korea
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• v.13 no.4
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• pp.25-34
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• 2018

This study is a literature study that analyzes empirical case study of Flipped learning application which has emerged as a method of future university education in Korea. The purpose of the study is to explore the use of digital media by learners in the Flipped learning applied courses in domestic universities considering current digital-based media environment. For this purpose, we analyzed the measurement variables and statistical significance of the preceding studies and analyzed the media utilization. The most important measurement variables were 'learning achievement' and 'class satisfaction', which were measures of effectiveness on the Flipped learning classes. All studies analyzed used media, but most studies focused on verifying the effectiveness of classroom classes, resulting in separate media utilization measurements in one study and statistically meaningful results for the 'video learning recognition' variable. The qualitative measurement related to the use of media for each study was presented as a separate analysis result. In the future, in order for effective follow-up studies on application of Flipped learning and digital media utilization, there are five main issues that need to be studied, which are securing the necessary treatment period for accurate effect measurement, etc.

• Journal of Digital Convergence
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• v.20 no.4
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• pp.553-563
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• 2022

In the multimedia era and contemporary art, the expression of narrative is expanding in various ways based on formal theory. And the expression form is maximized according to the use of each medium. In terms of understanding artworks, an approach that combines various expressions and media using these narratives is also possible. Therefore, this study analyzed the works of the artists by selecting three artists, Sadic Guissi Alfrazi, Lindsay Sears, and Kara Walker, who fused the media using narrative structures. Through this, it was intended to present the artistic value and significance of the work and the possibility of expanding the narrative expression of contemporary art in the future. As a result of the analysis of previous artists' works, it was shown that the phase of convergence can be derived by using the medium of narrative concepts beyond the dichotomy of content and form, confirming that digital technology and media development are changing the form of art. In addition, it was confirmed that the use of narrative structure facilitates media conversion. It is expected that discussions on the new paradigm of contemporary art will progress in the future.

• 한국노년학
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• v.27 no.2
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• pp.299-322
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• 2007

The purpose of this study is to critically review recent discourse on aging appeared in Korean newspapers. For this purpose, 1,725 articles on 'aging' or 'elderly' appeared on three major Korean newspapers during 1997- 2006 are analyzed. It is shown that there is a recent surge of articles portraying the positive images of aging in Korean newspapers emphasizing the importance of productive, successful aging and active life style of the elderly. This trend is a welcomed change from the negative images of elderly as dependent burden of society. However, it seems that over emphasis on positive aging and 'New Elderly' might have created another stereotype about the elderly and unintentionally marginalize the certain group of the elderly. By focusing on individual responsibility, it also overlooked the constraints imposed by social structure on disadvantaged elderly group, such as women, elderly in low socio-economic strata. Theoretical and policy implications of this trends are discussed.

• Proceedings of the Korea Contents Association Conference
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• 2004.11a
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• pp.74-77
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• 2004

미디어의 발달은 인간의 문화 전반에 걸쳐 근본적인 혁신을 가져왔다. 인쇄술의 발달에서부터 오늘날의 컴퓨터에 이르기 까지 인간의 표현수단으로 여겨져 왔던 매체들이 오늘날이 이르러서는 인간의 사고와 가치관에 대한 새로운 해석을 야기 시키고, 창작의 도구로서가 아니라 창작 자체를 주도하는 능동적인 역할을 하게 되었다. 특히 시각문화에서의 매체의 기능과 시각문화와의 관계를 살펴보고자 한다.

• Digital Contents
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• no.6 s.121
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• pp.76-79
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• 2003

정보사회는 다양한 매체의 사회이기도 하며, 또한 한계가 불명확한 사회라고 할 수 있다. 우리는 P2P나 스트리밍서비스 등 인터넷이라는 매체를 통해 다양한 정보콘텐츠를 이용하기도 하고, 제공하기도 한다. 매체의 다양화에 따른 법적 문제점들이 대두되고 있으며, 특히 음악과 게임관련 분야에서는 풀리지 않는 실타래처럼 얽혀있는 것이 사실이다.