• 한국콘텐츠학회논문지
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• 제21권3호
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• pp.676-684
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• 2021

본 연구는 청소년의 우울과 인터넷과의존, 부모양육방식 간의 관계를 규명하고, 청소년 우울과 인터넷과의 존 간의 작용하는 부모양육방식의 매개효과를 검증하는 데 목적이 있다. 본 연구에서는 13차 한국복지패널(KWPS)데이터를 활용하여 청소년 375명의 자료를 분석하였다. 자료는 SPSS WIN v21.0을 활용하여 기술통계, 상관관계분석, 매개 회귀분석을 실시하였다. 본 연구의 주요결과는 다음과 같다. 부모양육태도 중 부모참여는 우울과 인터넷과의존에서 부적인 매개효과를 가졌고, 부모양육태도 중 지도감독의 경우는 매개효과가 없는 것으로 나타났다. 부모양육태도 중 아동학대는 우울과 인터넷과의존에서 정적인 매개효과를 가지는 것으로 나타났다. 본 연구결과에 근거하여 부모참여를 향상시키고 아동학대를 줄일 수 있는 실천 및 정책적 제언을 제시하였다.

• 인터넷정보학회논문지
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• 제18권4호
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• pp.89-97
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• 2017

본 논문은 스마트 교육을 위한 청소년의 우울과 휴대폰 의존도, 부모의 양육행동, 또래관계의 구조적 관계를 확인하고자 하였다. 또 청소년의 우울과 휴대폰 의존 관계에서 부모양육행동과 또래관계의 매개적 효과를 확인하였다. 본 연구는 한국아동, 청소년패널 조사(KCYPS) 6차년도 중1패널의 자료 중 총 1897명의 청소년 응답과 보호자의 설문데이터를 분석대상으로 하였다. 자료분석을 위해 SPSS와 Amos프로그램을 사용하였다. 대상 변인들의 상관 및 기술통계분석을 위해서 SPSS을 사용하였고 부모의 양육행동의 경로분석과 매개효과 검증을 위해 구조방정식을 이용하였다. 검증결과, 청소년의 우울과 부모의 양육행동은 청소년의 휴대폰 의존도에 직접적인 영향을 미치는 것으로 나타났다. 그리고 청소년의 우울은 부모의 양육행동을 통해 간접적인 영향을 미치는 것으로 나타나 부분 매개효과를 확인할 수 있었다. 하지만 또래관계의 매개효과는 나타나지 않았다. 이상의 결과로부터 청소년의 휴대전화 의존을 예방하기 위한 방안과 스마트 교육 개발시 유의점에 등에 대해 논의하였다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제10권8호
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• pp.3585-3601
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• 2016

The error rate performance of circularly distributed antenna system is studied over Nakagami-m fading channels, where a dual-channel receiver is employed for the quadrature phase shift keying signals detection. To mitigate the Co-Channel Interference (CCI) caused by the adjacent cells and to save the transmit power, this work presents remote antenna unit selection transmission based on the best channel quality and the maximized path-loss, respectively. The commonly used Gaussian and Q-function approximation method in which the CCI and the noise are assumed to be Gaussian distributed fails to depict the precise system performance according to the central limit theory. To this end, this work treats the CCI as a random variable with random variance. Since the in-phase and the quadrature components of the CCI are correlated over Nakagami-m fading channels, the dependency between the in-phase and the quadrature components is also considered for the error rate analysis. For the special case of Rayleigh fading in which the dependency between the in-phase and the quadrature components can be ignored, the closed-form error rate expressions are derived. Numerical results validate the accuracy of the theoretical analysis, and a comparison among different transmission schemes is also performed.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제12권6호
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• pp.2470-2491
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• 2018

Web-scale open information extraction (Open IE) plays an important role in NLP tasks like acquiring common-sense knowledge, learning selectional preferences and automatic text understanding. A large number of Open IE approaches have been proposed in the last decade, and the majority of these approaches are based on supervised learning or dependency parsing. In this paper, we present a novel method for web scale open information extraction, which employs cosine distance based on Google word vector as the confidence score of the extraction. The proposed method is a purely unsupervised learning algorithm without requiring any hand-labeled training data or dependency parse features. We also present the mathematically rigorous proof for the new method with Bayes Inference and Artificial Neural Network theory. It turns out that the proposed algorithm is equivalent to Maximum Likelihood Estimation of the joint probability distribution over the elements of the candidate extraction. The proof itself also theoretically suggests a typical usage of word vector for other NLP tasks. Experiments show that the distance-based method leads to further improvements over the newly presented Open IE systems on three benchmark datasets, in terms of effectiveness and efficiency.

• International journal of advanced smart convergence
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• 제8권1호
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• pp.133-140
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• 2019

In this paper, we present an algorithm for adjusting degree of belief for consistency on the evidence dependency network where various sets of evidence support different sets of hypotheses. It is common for experts to assign higher degree of belief to a hypothesis when there is more evidence over the hypothesis. Human expert without knowledge of uncertainty handling may not be able to cope with how evidence is combined to produce the anticipated belief value. Belief in a hypothesis changes as a series of evidence is known to be true. In non-monotonic reasoning environments, the belief retraction method is needed to clearly deal with uncertain situations. We create evidence dependency network from rules and apply the evidence retraction algorithm to refine belief values on the hypothesis set. We also introduce negative belief values to reflect the reverse effect of evidence combination.

• International Journal of Internet, Broadcasting and Communication
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• 제12권2호
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• pp.37-44
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• 2020

The fifth generation (5G) mobile communication has been commercialized and the 5G applications, such as the artificial intelligence (AI) and the internet of things (IoT), are deployed all over the world. The 5G new radio (NR) wireless networks are characterized by 100 times more traffic, 1000 times higher system capacity, and 1 ms latency. One of the promising 5G technologies is non-orthogonal multiple access (NOMA). In order for the NOMA performance to be improved, sometimes the additive signal-dependent Gaussian noise (ASDGN) channel model is required. However, the channel capacity calculation of such channels is so difficult, that only lower and upper bounds on the capacity of ASDGN channels have been presented. Such difficulties are due to the specific constraints on the dependency. Herein, we provide the capacity of ASDGN channels, by removing the constraints except the dependency. Then we obtain the ASDGN channel capacity, not lower and upper bounds, so that the clear impact of ASDGN can be clarified, compared to additive white Gaussian noise (AWGN). It is shown that the ASDGN channel capacity is greater than the AWGN channel capacity, for the high signal-to-noise ratio (SNR). We also apply the analytical results to the NOMA scheme to verify the superiority of ASDGN channels.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제4권6호
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• pp.1209-1221
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• 2010

Three dimensional (3D) video is expected to be an important application for broadcast and IP streaming services. One of the main limitations for the transmission of 3D video over IP networks is network bandwidth mismatch due to the large size of 3D data, which causes fatal decoding errors and mosaic-like damage. This paper presents a novel selective frame discard method to address the problem. The main idea of the proposed method is the symmetrical discard of the two dimensional (2D) video frame and the depth map frame. Also, the frames to be discarded are selected after additional consideration of the playback deadline, the network bandwidth, and the inter-frame dependency relationship within a group of pictures (GOP). It enables the efficient utilization of the network bandwidth and high quality 3D IPTV service. The simulation results demonstrate that the proposed method enhances the media quality of 3D video streaming even in the case of bad network conditions.

• 디지털융복합연구
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• 제15권3호
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• pp.39-46
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• 2017

본 연구의 목적은 우리나라에서 인터넷 중독 정책에서 나타나는 문제점에 대해서 고찰하고, 융합적 담론 구조에 의한 합리적 국가 정책의 전달체계를 모색하는 데 있다. 이를 위해 문헌연구를 통해 신제도론적 입장에서 현황을 분석하고 또 새로운 대안을 모색했다. 현재 우리나라에는 각 부처간 서로 다른 이해관계 때문에 정부 부처간, 그리고 정부, 기업, 시민사회간 다양한 갈등양상이 전개되는 것으로 나타났다. 신제도론 입장에서는 현재의 중앙정부가 주체가 된 정책 시스템을 향후 지방정부로 이전시키는 한편, 정부가 독점한 주도권을 정부, 기업, 시민사회가 함께 공유하여 거버넌스 형태로 운영하는 것이 최선인 것으로 도출되었다. 10개 중앙정부 협의체 형식의 국가시스템이 아니라 주민생활권 단위의 광역지방정부가 지역공동체 내의 기업, 학교, 시민사회 등과 협력하여 정책을 추진하는 것이다. 이 융합 모델은 현재의 부처간 고착화된 경쟁 구조 때문에 발생하는 갈등을 넘어 중독으로 인해 고통받는 주민에게 더 유익한 대안이 될 것이다. 또한 향후 지역공동체 내에서 정신건강 서비스의 전달체계 연구의 단초가 되기를 기대한다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제7권9호
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• pp.2326-2337
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• 2013

Many applications can be parallelized by using multicore platforms. We propose a load-balancing technique for parallelizing a whole application, whose first module (H.264) has data independency and whose second module (AES) has data dependency. Instead of distributing the first module symmetrically over the multi-core platform, we distribute the data-independent workload asymmetrically in order to start the data-dependent workload as early as possible. Based on the experimental results with a compression/encryption application, we confirm that the asymmetric load balancing can provide better performance than the typical symmetric load balancing.

• 인터넷정보학회지
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• 제14권4호
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• pp.63-76
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• 2013

This short report introduces the general background why Brazil conference is being prepared and what topics would be undertaken and what goals are being taken into account. It overviews what differences from traditional telecommunication governance, internet governance has had in its historical development and how such differences had been formed from its technological differences and the regulatory policy shift from common carrier regulation to privatization. Moreover, the fact that open, voluntary, bottom-up, diverse stakeholder's participation had evolved throughout the historical development of the internet, had established the present multistakeholder governance model from technological standardization to addressing scheme policies. ICANN, which has governed internet addressing schemes since the earlier 2000s, had developed address policies including IANA function from Jon Postel and technical community's legacy management system into contract based formation between ICANN and gTLD, ccTLD registries. And it made dispute resolution policies responding to trademark disputes and resolved gTLD monopoly issue by introducing new TLD generation and the separation of registry and registar. However, there had been challenges on the legitimacy of ICANN due to its dependency on the Federal Government of the U.S. particularly in its oversight role over ICANN and IANA contract. WSIS raised up internet governance issues including addressing governance, and set up IGF as a discussion platform for multistakeholders to discuss and share all views on other internet related public policies. IGF's loose and non-binding discussion once frustrated governments and other stakeholders, but more focused discussion and visible outcomes have consolidated its unique role for internet governance discourses. Particularly, IGF addressed many emerging internet related issues like cybersecurity, privacy, net neuratlity, development related issues. WTPF of 2013, after WCIT debate on whether traditional telecommunication regulation could be applied to internet infrastructure, suggested other governance issues such as the transition to ipv6, IXP coordination etc. How to make sure the legitimacy of internet addressing governance and how and where other internet related public policies could be undertaken are fundamental tasks for internet governance. Brazil conference, which has been motivated by the breakdown of trust in internet governance from NSA mass surveillance revealed by Snowden, faces these questions and try to make consensus on principles, institutions and roadmap for internet governance in multistakeholder participation way.