• 한국인터넷방송통신학회논문지
• /
• 제9권6호
• /
• pp.75-87
• /
• 2009

무선메쉬네트워크환경에서 기존의 MAC 프로토콜이 QoS를 지원하기는 매우 힘들다. DCF는 QoS를 지원할 수 없으며, EDCA는 경쟁기반 채널접근방식을 사용하지만 무선메쉬환경에서는 제대로 된 성능을 제공하지 못한다. 본 논문은 무선메쉬네트워크를 지원하는 MAC 프로토콜인 Multi-Media DCF(MMDCF)를 이용한 프레임 관리 기법을 통해 QoS를 지원하는 방법을 제안한다. MMDCF에서는 TDMA기반 MAC 프로토콜로 TDMA frame안의 ACH phase을 이용해서 중요도에 따른 선택 및 그룹화를 이용한 삭제 방법을 이용한 경쟁적 채널 접근방법을 제공한다. ACH 방식의 우선순위화된(Prioritized) Phase의 slot(PP)개수 m과 Fair Elimination Phase(FEP)의 slot개수 n은 경쟁 수준을 결정함과 동시에 하나의 Mobile Point가 경쟁에서 선택될 확률을 높여주는 역할을 한다. 강제적인 TDMA frame의 해제를 통해서 QoS 요구사항을 충족시킬 수 있는 방법도 제공한다. 실험결과 다수의 멀티미디어 스트림 환경에서 MMDCF는 EDCA보다 QoS의 요구사항을 만족시키면서 전체적인 채널의 효율성에서도 좋은 성능을 제공하였다.

• 한국기록관리학회지
• /
• 제24권1호
• /
• pp.231-256
• /
• 2024

이 연구는 국내 동시대 미술작가들을 대상으로 개인기록의 생산 및 관리 현황을 조사하고 이를 토대로 교육 등 작가들의 작품활동 기록화에 필요한 지원 방안을 제안하는 것을 목적으로 한다. 이를 위해 첫째, 동시대 미술에서 작품활동 기록화의 중요성과 이를 위한 지원 동향을 문헌 연구를 통해 정리하였다. 둘째, 다양한 형식과 매체를 활용하는 동시대 미술작가 6명에 대한 인터뷰를 실시하였다. 인터뷰를 통해 작품활동 과정별로 기록 생산 현황을 조사하였고, 기록유형별로 관리실태를 조사하였다. 셋째, 조사 내용에 대한 분석을 토대로 작가, 미술관, 아키비스트 등이 작품 기록화를 위하여 협력, 지원해야 할 사항을 제안하였다. 지원 영역은 교육프로그램의 제공, 미술관의 작품활동 기록화, 기록화를 위한 도구 개발 및 지원으로 구분하였다.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제6권4호
• /
• pp.1153-1170
• /
• 2012

Multimedia computing has attracted considerable attention with the rapid growth in the development and application of multimedia technology. Current studies have attempted to support the increasing resource consumption and computational overhead caused by multimedia computing. In this paper, we propose $MediaCloud$, a new multimedia computing paradigm that integrates the concept of cloud computing in handling multimedia applications and services effectively and efficiently. $MediaCloud$ faces the following key challenges: heterogeneity, scalability, and multimedia Quality of Service (QoS) provisioning. To address the challenges above, first, a layered architecture of $MediaCloud$, which can provide scalable multimedia services, is presented. Then, $MediaCloud$ technologies by which users can access multimedia services from different terminals anytime and anywhere with QoS provisioning are introduced. Finally, $MediaCloud$ implementation and applications are presented, and media retrieval and delivery are adopted as case studies to demonstrate the feasibility of the proposed $MediaCloud$ design.

• The Journal of Asian Finance, Economics and Business
• /
• 제7권11호
• /
• pp.915-925
• /
• 2020

The purpose of the research is to analyze the behavioral intention to adopt social media in SMEs affected by the COVID-19 crisis, based on the TOE Model. This study uses the TOE framework as a theoretical basis. This research is important because COVID-19 has destroyed most of the SMEs, and SMEs are exposed to social media technology to market their products. The success of social media adoption has helped SMEs to be able to rise from adversity. Respondents in this study were 250 SMEs in the Special Region of Yogyakarta, Indonesia. The data analysis technique used is structural equation modeling with AMOS. The results of this study indicate that SMEs affected by the COVID-19 crisis have a high awareness of social media and have a high intention to adopt social media as a way to market their products and connect with customers. The intention to adopt social media is significantly influenced by the technological context, organizational context, environmental context, and social media awareness. The findings of this study suggest that in times of crisis due to the COVID-19 pandemic, the Government support is needed. The Government needs to open services for SMEs whose businesses are affected by the pandemic.

• International Journal of Knowledge Content Development & Technology
• /
• 제6권2호
• /
• pp.43-66
• /
• 2016

The primary objective of this study was to investigate the perception of informational professionals' knowledge sharing practices in social media platforms. The specific objectives of the study included learning professionals' perceptions and awareness of knowledge sharing using social media, understanding their opinions and beliefs, and gaining familiarity with and reasons for using these tools. Open & close ended web-based questions were sent out by email to the international training program (ITP) participants. Findings indicated that most of the respondents' were aware of using social media and that they used social media for knowledge sharing. Speed and ease of use, managing personal knowledge, easier communication with users and colleagues and powerful communication tool are the areas that motivated them to use it. It also stated some barriers like lack of support, familiarity, trust, unfiltered information and fear of providing information. The study was limited to the perceptual aspect of the issue, specifically from the individuals' opinions and sentiments.

• The Journal of Asian Finance, Economics and Business
• /
• 제9권2호
• /
• pp.371-382
• /
• 2022

In this paper, we investigates the benefits of using social media on intentions and implementation entrepreneurial. This study took place in a well-known vocational college in Bandung, Indonesia, from July 2020 to January 2021. The research method used was the explanatory survey. Research data obtained from 317 respondent. Factor analysis and multiple regression were used to analyze the data. According to this study, social media has three dimensions: ease of use, controllability, usability, and profit. Entrepreneurial intention is made up of two components: entrepreneurial motive and entrepreneurial effort. Furthermore, there are four components to entrepreneurship implementation: investment courage, technology tools, social media skills, and environmental support. Other findings of each dimension of social media proved to affect entrepreneurial intention positively. The four aspects of entrepreneurial execution were likewise positively influenced by the dimension of entrepreneurial intention. This research reveals that students make the most use of the technologies available on social media for business and interactively communicate with their customers. Therefore, social media plays a role in accelerating the growth of entrepreneurship among students. However, more research is needed to see if there is a continuous pattern in the findings of this study so that the findings can be generalized.

• 분석과 대안
• /
• 제1권2호
• /
• pp.13-30
• /
• 2017

Referred to as a 'media war,' there is a fierce competition for media discourse between different countries. Twenty four hour global news channels like Al Jazeera, France 24, RT, NHK World, China's CCTV and teleSUR emerged to offer their own perspectives and stance in the global society, and to face the monopolization and distorted information created by the hegemony of English news channels which have swayed international public opinions for a long time. As a tool of public diplomacy, the media's role in determining the image of the nation and winning the 'Hearts and Minds' of the international community is decisive, but it cannot be said that they all have a similar influence or play a positive role in media diplomacy. A global news channel, which is both a media diplomatic subject and a journalism organization, can be in the position of acting as a public relations organization or a propaganda agency for the government depending on the regime's attitude because most of global news channels receive support from the government. Sometimes it is difficult for these media to implement quality journalism because of financial difficulties. Media discourse also has limitations in that it is dependent upon changes in foreign policy of its own government. This study examines the current status of global news channels, the dilemma these channels are facing, and suggests some potential directions that can be taken by global news channels in order to become more effective. It is becoming increasingly important for all nations to respond to distorted information about their own countries, to appropriately identify various issues and changes in the international community and to convey their views and positions to the international community. For now, there is a lack of awareness about the importance of media diplomacy in Korea: There are many English-language media, but as yet no global news channel which could have an influence on the international stage. However, there seems to be some understanding about the need for the media to present the Korean alternative discourse to the senseless dependency on Western media. We hope that this study will be an opportunity to think in depth about the attitude of the Korean global media, whether existing global media or new global news channels, in order to help them become more effective in media diplomacy.

• 벤처창업연구
• /
• 제16권5호
• /
• pp.125-141
• /
• 2021

급속하게 변하고 있는 디지털 환경의 사회 구조는 경제활동에 큰 영향을 주고 있다. 경제활동을 지속하려는 개인과 정책지원을 하는 국가에도 중요한 현안이다. 고령화로 인한 인적 자본 활용 문제, 코로나19 팬데믹으로 인한 실물경제 불황과 대면 경제활동의 위축 그리고 고용 감소와 일자리 불안정성이 대두되면서 비대면 산업이 활성화되었다. 그에 따라 디지털 미디어 콘텐츠 기반의 경제활동이 일상화되었고, 정부도 미디어 콘텐츠 기반 경제활동에 실효성 있는 인적 자본 활용이 주요 정책 과제가 되었다. 일자리 지속을 바라는 사람들에게 디지털 환경에 대한 적응은 선택이 아닌 필수가 되었다. 따라서 본 연구는 디지털 역량과 개인적 역량이 경제활동 지속 의도에 미치는 영향을 실증적으로 분석하고, 롤 모델의 조절 효과를 검증하였다. 본 연구의 목적을 달성하기 위하여 전국 남·여 20~80세를 대상으로 온라인 설문조사를 실시하였으며, 수집된 설문지 385부 중 382부의 자료를 분석하였다. 본 연구의 분석을 위해서 SPSS 23.0의 프로그램을 사용하였고, 설문 항목은 Likert 5점 척도를 이용하여 측정하였다. 분석 결과는 첫째, 디지털 역량 중 미디어 콘텐츠 활용 역량은 경제활동 지속 의도에 정(+)의 영향이 나타나 SNS 등의 최신 디지털 미디어 콘텐츠 활용 역량이 높을수록 경제활동 지속 의도가 증가하는 것으로 나타났다. 둘째, 개인적 역량 중 자금 능력은 부(-)의 영향이, 경험은 정(+)의 영향이 경제활동 지속 의도에 미치는 것으로 나타났다. 셋째, 사회적 환경은 경제활동 지속 의도에 의미 있는 영향이 없는 것으로 나타났다. 넷째, 사회적 지지 중 가족지지는 경제활동 지속 의도에 정(+)의 영향이 나타나 가족에 대한 다양한 감정적 지원은 경제활동 지속 의도가 증가하는 것으로 나타났다. 다섯째, 롤 모델은 경제활동 지속 의도에 정(+)의 영향이 미치는 것으로 나타났으며, 미디어 콘텐츠 활용 역량과 가족지지가 경제활동 지속 의도에 미치는 영향에서 조절 효과 역할을 하는 것으로 나타났다. 따라서 본 연구 결과, 경제활동 지속을 위하여 디지털 미디어 콘텐츠 기반의 디지털 교육과 인적 구조에 맞는 정부의 취업과 창업에 대한 정책지원이 요구된다.

• 디지털산업정보학회논문지
• /
• 제8권2호
• /
• pp.117-130
• /
• 2012

Due to the development of network and device, it is called mobile age that boosts various distribution routes of multi-media content and it constructs a new digital content consumption trend. N-screen is one of the new-introduced examples in the digital age and broadcasting industry believes it as a crisis and challenge as well. It becomes a ubiquitous multi-media environment that people watch multi-media content everywhere and any time they want to and competition happens beyond the boundaries such as network industry, terminal industry, pay TV market, traditional terrestrial TV, etc. And then how should the broadcasting service prepare for the N-screen business? The present research proposes a few terrestial broadcasting content strategies in the multi platform environment. First, instead of N-screen, it proposes multi platform, especially One Source Multi Platform(OSMP). Second, so-called 'Integrated Terrestrial Broadcasting OSMP Alliance(IBPA)' must be founded. Third, IBPA should support multi-tasking UX for viewers to have rich experience. Last, it becomes more important and necessary to support local terrestrial broadcasting service for public service in the multi platform age.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제6권2호
• /
• pp.529-546
• /
• 2012

To address the need for autonomous control of remote and distributed mobile systems, Machine-to-Machine (M2M) communications are rapidly gaining attention from both academia and industry. M2M communications have recently been deployed in smart grid, home networking, health care, and vehicular networking environments. This paper focuses on M2M communications in the vehicular networking context and investigates areas where M2M principles can improve vehicular networking. Since connected vehicles are essentially a network of machines that are communicating, preferably autonomously, vehicular networks can benefit a lot from M2M communications support. The M2M paradigm enhances vehicular networking by supporting large-scale deployment of devices, cross-platform networking, autonomous monitoring and control, visualization of the system and measurements, and security. We also present some of the challenges that still need to be addressed to fully enable M2M support in the vehicular networking environment. Of these, component standardization and data security management are considered to be the most significant challenges.