• The Journal of the Korea Contents Association
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• v.21 no.12
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• pp.84-94
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• 2021

Graph databases have been developed to efficiently store and query graph data composed of vertices and edges to express relationships between objects. Since the query types of graph database show very different characteristics from traditional NoSQL databases, benchmarking tools suitable for graph databases to verify the performance of the graph database are needed. In this paper, we propose an efficient graph database benchmarking system that supports diversity in graph inputs and queries. The proposed system utilizes OrientDB to conduct benchmarking for graph databases. In order to support the diversity of input graphs and query graphs, we use LDBC that is an existing graph data generation tool. We demonstrate the feasibility and effectiveness of the proposed scheme through analysis of benchmarking results. As a result of performance evaluation, it has been shown that the proposed system can generate customizable synthetic graph data, and benchmarking can be performed based on the generated graph data.

• The Journal of the Korea Contents Association
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• v.7 no.10
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• pp.44-58
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• 2007

E-homestudy refers to e-Learning after school. This concept has been introduced by Korean Government as a substitute for expensive private tutoring. The purpose of this research is to explore the perceptions and relationships among determinants affecting the attitude and satisfaction level in e-homestudy. Such factors as subjective norms, visibility, perceived usefulness, quality of contents, facilitating conditions, interactions are introduced into the model. The survey results show that the attitude and the self-directed teaming level influence the satisfaction level in e-homestudy; the subjective norms, visibility, and perceived usefulness are the major determinant affecting the attitude; the quality of contents as well as interactions have positive impact on the perceived usefulness.

• The Journal of the Korea Contents Association
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• v.8 no.5
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• pp.176-183
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• 2008

The transition to digital television is a massive and complex undertaking, affecting virtually every segment of the television industry and all viewers who watch television. In this respect, consequences of digital conversion of broadcasting and its related industries are so tremendous that countermeasure establishment for activation of digital broadcasting and programming industry is required. This paper explores the current situation of digital broadcasting in terms of the channel operation and contents focusing on the cases of the U.S. and U.K. In doing so, this paper presents reasonable directions and policy suggestions that should be resolved to advance Korean digital broadcasting.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2012.07a
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• pp.215-218
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• 2012

반도체 기술 및 방송통신기술의 발달에 따라 소비자는 복잡하고 다양한 서비스 환경을 접하고 있으며, 개인당 소비되는 콘텐츠의 양은 기하급수적으로 증가 되고 있다. 스마트폰과 같은 멀티미디어기기의 발전으로 기존의 단순 시청에서 벗어나 멀티미디어 검색과 추천과 같은 다양한 서비스들이 제공되고 있으며, 웹과 인터넷을 기반으로 하는 정보기술은 모바일 전자 기술의 발달에 따라 데스크톱이라는 공간적인 한계를 벗어나 유기적인 유비쿼터스 환경으로 변화하고 있다. 이와 같이 소비자들이 접하는 멀티미디어의 양이 증가됨에 따라, 멀티미디어를 검색하기 위한 다양 서비스들이 사업자들을 통해 제공되고 있다. 그러나 사업자들이 구축한 서버들은 공유되어지지 못하며, 공유되더라도 공유하기 위한 방법이 제각각이다. 이에 MPEG에서는 멀티미디어 콘텐츠를 검색하기 위한 질의 구조를 표준화 하여, 서비스 제공자 및 소비자들에게 유용한 검색 인터페이스를 제공하였다. 이에 본 논문에서는 MPEG Query Format에 기반 하여 임베디드 환경에서 광대한 양의 음악 콘텐츠에서 사용자가 원하는 허밍 질의를 편리하게 검색하기 위한 방법을 성계 및 구현한다.

• Smart Media Journal
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• v.12 no.1
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• pp.92-101
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• 2023

The importance of high-definition video has increased by increase in consumer demand for realistic content. Therefore, this study presented the UHD strategy of terrestrial broadcasters for global competitiveness. First, as a practical strategy, to secure domestic market, it should secure an ecosystem through cooperation among departments, create synergy, and prioritize the UHD field to gain global competitiveness with close cooperation with expertised countries in the field. Also, after securing the domestic market by developing UHDTV focusing on cost-effectiveness on socio-cultural situation of Korea, it should utilize the finance and technology for global market. government should support global competitiveness as a control tower, strengthening global content, composing a long-term roadmap, supporting related materials, and creating and exporting our own UHDTV model

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.28 no.3
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• pp.217-240
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• 2017

The purpose of this study was to investigate the semantic network analysis to understand image contents and to examine the degree to which words, word clusters contributed to the formation of semantic map within image contents. For this research, from 1993 until 2016 the field of the image contents were collected for a total of 2,624 cases papers. The word appeared in Title analyzed the social network by using the R program of Big Data. The results were as follows: First, The field of image contents is based on researches related to 'image', 'media' and 'contents'. Second, there is a three-step flow ('education' -> 'media' -> 'contents') of research in the field of image contents. Third, researches related to 'broadcasting', 'digital', 'technology', and 'production' were continuously carried out. Finally, There were new research subjects for each regime.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.48 no.9
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• pp.73-80
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• 2011

Conventional content-delivering services over the Internet were mainly based on the "best effort" scheme, which have been failed to provide a concrete profit model to the content providers. Mean while, a quality assuring network service is expected to provide reasonable profit model. However the relation between the cost and profit of the quality service is under studies. Recently, the Quality of Experience (QoE) was introduced to measure the real satisfaction level of users and used to develope profit models of quality services. The QoE can be used as a key tool for efficient service providing and also criteria for accurate satisfaction measurement. Especially, the QoE based feedback on the intention to pay for the service will be an important information to the content providers. This paper will introduce a model for the costs of quality services, and a profit model based on the QoE. The result of the paper can be used to develope business models for contents services over the growing networks.

• Journal of rehabilitation welfare engineering & assistive technology
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• v.12 no.1
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• pp.20-28
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• 2018

In this research, for the smooth cultural life of seniors, we recruit 92 smart seniors (male: 22, female: 70) and survey their preferred content sub-genre. The survey is mainly based on the two devices (PC, Smartphone) to be used. As a result of the study, there was a little difference in preference on the web pages between both devices, the video contents showed the similar preference, regardless of the device. Also, sub-genres surveyed show higher correlations with similar sub-genres in other content genres. So, If the result of this study is reflected in the development of cultural contents and the composition of content pages, it will be helpful for senior to enjoy the improved cultural life by lowering entry barriers accessing digital media contents.

• The Journal of the Korea Contents Association
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• v.21 no.4
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• pp.220-232
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• 2021

The purpose of this study is to analyze the effects of the old people's self-efficacy on the quality of life. In other words, the impact of old people's self-efficacy on self-respect, old people's self-efficacy on quality of life, and old people's self-respect on quality of life were analyzed in depth. In particular, it was intended to use the recently emphasized variables of self-respect to verify the mediated effects of self-respect in the relationship between self-efficacy and flesh quality, suggesting ways to lead a happy life by improving the psychological satisfaction and quality of life through the participation of the elderly in sports-for-all. To achieve this purpose, 297 people aged 60 or older who participated in the sports-for-all program conducted by the city and district offices in Seoul for five months from May 1 to September 30, 2018 or who used public sports facilities such as parks and playgrounds were analyzed as subjects for research. The findings are as follows. First, the "self-efficacy" of the elderly participating in the sports-for-all has been shown to affect "self-respect." Second, the "self-efficacy" of the elderly participating in the sports-for-all has been shown to affect the "quality of life." Third, it has been shown that the "self-respect" of the elderly participating in sports for all affects the quality of life. Fourth, the "self-esteem" of the elderly participating in sports for all occurred in the relationship between self-efficacy and quality of life. The implications of this study are that the self-efficacy of the elderly participating in sports for daily life has been identified by using the parameters of self-respect. Through this, it was provided as empirical basic data to establish welfare policies for senior citizens to improve the quality of life of senior citizens by identifying their self-efficacy, self-respect, and quality of life.

• Journal of Practical Engineering Education
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• v.13 no.3
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• pp.453-460
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• 2021

The purpose of this study is to understand the educational types and educational status of institutions that operate virtual training contents distributed by K University's Online Lifelong Education Center and to examine the role and improvement measures of institutions that supply virtual training contents. To this end, a survey was conducted on 56 institutions that operate virtual training contents distributed by K University's Online Lifelong Education Center in 2020, and a survey of 44 institutions that responded finally was analyzed. The analysis results are as follows. First, virtual training education media responded that a total of 52 courses were applied to the content process using PC, the theory+virtual training type is the most, and one to two weeks of practice period were the most. In addition, when looking at the current status of education, the subjects of virtual training were mainly students, and the institution itself recruited, and the largest number of respondents was 1-20, the number of courses opened was 1-3, and the number of teachers and instructors in charge was 1-3. Second, they responded that it is necessary to develop various virtual training contents as a virtual training content supply institution, present ways to apply and utilize virtual training curriculum, and improve the quality of virtual training content. Third, as an improvement plan for virtual training content distribution institutions, it demanded strengthening the linkage of virtual training content, training using virtual training content by teachers and instructors, suggesting various virtual training content linkage, and strengthening virtual training content quality management. Therefore, this study is meaningful in that it identified the overall operation status and status of virtual training content management institutions and examined ways to establish and improve the role of public virtual training supply institutions.