• Information Systems Review
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• v.25 no.3
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• pp.1-26
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• 2023

A theoretical model of information overload (Jackson and Farzaneh, 2012) with its three influential components (i.e., time, technology, and social networks) was empirically tested in the context of news consumption behavior considered as a communicative outcome. Using a national sample of South Korean adults (N = 1166), data analyses identified perceived information overload and large/diverse social networks positively associated with active and passive news consumption. Findings may imply the existence of individually varying cognitive threshold (i.e., tipping point), if crossed individuals cannot process information any further. News consumers may keep searching and receiving information to verify factuality of news even when they feel overloaded.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2019.06a
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• pp.92-94
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• 2019

본 논문에서는 서브 블록별 상대적 거리에 따라 적응적으로 가중된 히스토그램 기반 지역적 대조비 향상 기법을 제안한다. 기존 지역적 대조비 향상 기법은 제한적인 공간의 정보만을 이용하기 때문에 과잉 대조비 향상, 결과 영상의 부자연스러움을 초래하는 반면, 제안하는 방법은 서브 블록별 상대적 거리에 반비례하는 가중치를 통해 더 넓은 공간의 정보를 적응적으로 이용하여 과잉 대조비 향상, 결과 영상의 부자연스러움을 효과적으로 방지한다. 실험 결과를 통해 제안하는 방법은 지역적 특성을 강화해주는 동시에 전역적인 자연스러움을 보존하는 것을 확인할 수 있다.

• Korean journal of communication and information
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• v.43
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• pp.152-172
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• 2008

The convergence of media poses serious challenges to technologies, industries and policy makers. At the core of the challenges lies a socially and culturally problematic condition of 'media unlimited.' Under the circumstances, the idea of public interest of the media seems to lose its intervening leverage as it flounders in countering 'the media torrent' rushing from the exponential growth of ICTs that overwhelms contemporary life and society. It is an urgent task for the critical community to blaze fresh new thoughts about the idea to intervene in the current age of media excess. Beyond the conventional content-conduit-centered perspective on the media, this study suggests a media-environment concept based on media ecology as an engaging leverage to replenish the public interest idea. The environmental approach to the media means literally to conceptualize the media as environment--a cultural eco-system. This study explores the potential of ecological approach in enriching the conceptual terrain of policy discussions and policy-making processes concerning the public interest idea that hopefully enlightens all the media actors concerned.

• Proceedings of the Korea Multimedia Society Conference
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• 2003.11b
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• pp.741-744
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• 2003

현대 사회 생활의 변화는 맞벌이 가정의 증가, 인스턴트 식품의 증가, 과잉섭취 등을 가져왔고 이는 청소년의 비만을 빠르게 증가시켜 성인병의 가장 중요한 원인인 비만 치료에 대한 요구가 높아지고 있으며, 학생들은 하루 생활의 대부분을 학교에서 보내고 있는 만큼 비만학생에게는 지속적인 학교보건교육 및 지도를 통한 치료가 필요하며, 이를 위한 윕 기반 시스템을 제안한다. 그리고 학교 생활에서 일반학생들보다 더 많은 주의를 필요로 하는 요양호(건강이상) 학생들에 관한 정보를 가정, 특정수업시간 등에서 변화가 생길 때마다 실시간으로 입력하고 이 정보를 공유하여 요양호 학생들의 건강하고 안전한 학교생활을 위하여 본 시스템을 제안한다.

• Journal of Korea Multimedia Society
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• v.9 no.3
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• pp.323-332
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• 2006

Fair packet scheduling algorithms supporting quality-of-services of real-time multimedia applications can be classified into the following two schemes in terms of the reference time used in calculating the timestamp of arriving packet; the Finish-Time (FT) and Start-Time (ST) schemes. The FT scheme, used in most schedulers, that has the property of an inversely rate-proportional latency is suitable to support various delay bounds because it can adjust the latency of a flow with raising the flow's reserved rate. However, the scheme may incur some bandwidth loss due to excess rate reservation. Meanwhile, although the ST scheme does not suffer from the bandwidth loss, it is hard to support multiple delay bounds because of its latency property relying on the number of flows. This paper is devoted to propose a ST scheme based scheduler to effectively support multiple delay bounds and analyze its performance comparing to the FT scheme based scheduler. The comparison results show that the proposed scheduler gives better utilization by up to 50%.

• Proceedings of the Korea Multimedia Society Conference
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• 2001.11a
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• pp.165-169
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• 2001

본 논문에서는 텍스쳐가 포함된 칼라 영상으로부터 텍스쳐에 무관하게 영역을 분할할 수 있는 방법을 개발하였다. 빠른 처리를 위해 영상을 블록 단위로 쪼개고 블록의 경계 성분값(H)을 계산하여 영역 분할에 이용할 수 있도록 하였다. M값은 객체의 경계에서는 높은 경계 강도를 갖지만 영역 내부나 텍스쳐 경계에서는 상대적으로 낮은 경계 강도를 갖도록 정의되었다 영상 분할을 위해 M값으로 표현된 M영상으로부터 Watershed를 이용해 경계 위치를 결정하고 닫혀진 형태로 경계가 표현될 수 있도록 하였다. 그런데 Watershed 방법은 과잉 분할 결과를 초래하므로 인접 영역 사이의 공유 경계에 대한 강도와 영역 내부의 칼라 분포 특성을 이용하여 영역을 병합함으로써 객체 경계처럼 중요한 변화가 발생되는 영역 단위의 최종 영상 분할된 결과를 얻을 수 있도록 하였다. 본 논문에서 제안한 방법은 MPEG4나 내용기반검색을 위한 영역분할에 유용하게 적용될 수 있을 것이다.

• The Journal of Korean Academy of Sensory Integration
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• v.17 no.1
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• pp.43-53
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• 2019

Objective : This study was designed to find the latest intervention trends in treatment of children with attention deficit hyperactivity disorder (ADHD) in South Korea. Methods : Studies on ADHD published in Korean journals from January 2004 to December 2018 were reviewed. The databases used were DBpia, Google Scholar, RISS, and KISS. The search terms were "attention deficit hyperactivity," "child," and "intervention." A total of 14 studies were selected. The results of this study were as follows: Patient, Intervention, Comparison, Outcome. Results : The level of evidence was the highest in the single subject study of level IV, and the methodological quality was the most common study. The interventional metronome (IM) intervention was the most frequently used, and the evaluation tools used in the measurement were the Long Form Assessment of the Interactive Metronome and the Korean Behavior Child Checklist. The Korean ADHD interventions showed statistically significant improvement in concentration, hyperactivity, task performance, excessive language use, and timing. Conclusions : Various types of interventions were provided for children with ADHD in South Korea. The interventions showed positive effects, and provided basic data for evidence-based implementation in clinical practice. In the future, a model study should be conducted, to establish an effective service delivery system, as well as ongoing research on children with ADHD.

• Journal of Korea Multimedia Society
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• v.9 no.2
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• pp.197-207
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• 2006

When the latency of a flow in a fair packet scheduler, which is determined by its rate, violates its required delay bound, the scheduler should reduce the latency with even raising the rate being reserved for the flow. The excessively reserved rate win enforce some outgoing link bandwidth be lost. This loss can not be, unfortunately, evaluated by the three metrics of latency, fairness and implementation complexity used in previous works. This paper is aimed to first introduce the metric of bandwidth utilization to investigate the bandwidth loss in a scheduler and then evaluate the timestamp based schedulers in terms of the bandwidth and payload utilizations. The results show that the bandwidth utilization increases with loosing the required delay bound and, in particular, schedulers with the latency property of WFQ have much better payload utilization by up to 50% than that in the SCFQ one.

• 한국HCI학회:학술대회논문집
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• 2009.02a
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• pp.1009-1014
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• 2009

Meta-thinking is a kind of thinking beyond certain scope or border, which sees objects as an expanded definition exceeding its essence. It can be experienced when people come into contact with new things. As for digital media, experience acquired from computer screen makes users' thinking be changed continuously and help their thinking to be expanded. Today, studies on development of digital technology regarding virtual reality (VR) and experience obtained from digital media become a topic of conversation, however, this experience depends on the sense of sight through screen. Actually, transparent experiences in digital media are not the same with those in real world, therefore, this study investigated experience expansion through interaction with real things which are much closer to daily lives than virtual experiences. It can be found in media art which induces positive participation of audiences and shows them a new meaning through delight and amusement experienced in the process of interaction. Visual expression in digital media should be more than spectacular which is only full of excessive images. In addition, interface should not be remained as an expression from technological attempts, instead, it is necessary to find humans aspiration with meta-thinking which accepts things expansively and visualize their experiences.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.29 no.8C
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• pp.1040-1046
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• 2004

The BLAST-OFDM system is an efficient method for high data rate multimedia transmission in futurewireless communication system. In this paper, a linear preceding mechanism and an efficient antenna-subcarrier assignment algorithm are proposed for the conventional BLAST-OFDM system, in order to utilize the full spatial diversity and the interleaved frequency diversity. By computer simulation, the proposed system has proved to achieve 4-5㏈ gain over the conventional BLAST-OFDM system.