• Journal of Industrial Convergence
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• v.17 no.4
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• pp.131-137
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• 2019

In infrastructure wireless mesh networks (WMNs), in order to improve mobile users' satisfaction for the given cache hit ratio, we investigate an User centric Cache Allocation (UCA) scheme while reducing cache cost in a mesh router (MR) and expected transmission time (ETT) for content search in cache. To minimize ETT values of mobile users, a genetic algorithm based UCA (GA-UCA) scheme is provided. The goal is to maximize mobile users' satisfaction via our well defined utility, which considers content popularity and the number of mobile users. Finally, through solving optimization problem we show the optimal cache can be allocated for UCA and GA-UCA. Besides, a WMN provider can find the optimal number of mobile users for user centric cache allocation in infrastructure WMNs.

• Proceedings of the KSR Conference
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• 2010.06a
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• pp.730-738
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• 2010

In the development of railroad station area, there are many factors about business management, but the interest of railroad users is an important factor as customer satisfaction. It is necessary to have the quality estimation of railroad service, and important factors of service as customer satisfaction aspects can be supply, reliability, convenience, and safety. In this study, primary factors are deduced in the efficiency aspects of railroad station facilities from analyzing relative importance index using AHP(Analytic Hierarchy Process) methods. The most high rank important factor is railroad station user facilities, and the AHP importance index of passenger facilities and elevator facilities for KORAIL personnel and facility users is index. The third of KORAIL personnel is movement facilities, but facility users index is sanitation. And the low important factors of KORAIL personnel and facility users are shown as the platform in passenger facilities, the rest facilities in waiting room, the escalator in going up and coming down facilities, the escalator in movement facilities, the raised letters block in guide facilities, and the parking lot in subsidiary facilities.

• KDI Journal of Economic Policy
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• v.18 no.2
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• pp.3-61
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• 1996

80년대초 이후 기술혁신의 가속으로 중소기업에서도 기술변화에 대한 적응이 경쟁력의 유지를 위한 핵심과제가 되면서, OECD 국가는 중소기업에 대한 과학기술정보(科學技術情報)의 이전(移轉)을 촉진하는 정부지원을 확충하였다. 경제성과의 개선을 위해서는 기술혁신만이 아니라 기술혁신의 성과를 확산시키는 것도 중요하다는 인식으로 중소기업의 경쟁력향상에 기여하는 과학기술정보의 공급확대를 위하여 연구개발사업(硏究開發事業)에 대한 지원을 강화하는 동시에 중소기업에 대한 과학기술정보의 이전을 촉진하기 위하여 과학기술정보의 공급원(供給源)(대학, 시험연구기관 등)과 중소기업을 연결하는 다양한 중개(仲介)(촉매(觸媒))기관(機關)의 설립 운영을 지원하고 있다. 연구개발과 과학기술정보이전에 관한 과학기술공급원과 중소기업간의 인식의 차이를 해소하기 위하여 정보교환(情報交換)과 인적교류(人的交流)를 확대하고 과학기술공급원이 제공하는 지식을 중소기업이 이용하기 쉬운 기술로 변환하기도 한다. 이러한 기능을 중개기관이 효과적으로 수행하기 위해서는 중소기업 사업자와 신뢰관계(信賴關係)를 구축하는 것이 긴요하며, 기술변화를 인지 수용하도록 유도하는 초기단계에서는 중소기업의 네트워크를 통하여 접근하는 것이 효과적이다. 이러한 기술확산과정(技術擴散過程)의 특성으로 인하여 지역혁신체제(地域革新體制)의 구축과 기술혁신정책(技術革新政策)의 지역화(地域化)가 강조되고 있다. 최근에 통상산업부와 과학기술처도 기술혁신정책의 지역화를 시도하고 있다. 연구기반과 산업기반을 고려하여 지역별로 다양한 유형의 산학연 공동연구기반이 구축될 계획이다. 기술혁신정책의 지역화는 시도단계에 불과하며 효율적인 지역혁신체제를 구축하기 위한 여건도 불리하다. 선진국에 비하여 대학과 연구기관의 연구자원(硏究資源)에서도 현격한 차이가 있으나, 네트워크의 혁신성을 좌우하는 지식집약형 중소기업의 비중과 중소기업기술개발의 혁신성에서도 선진국에 비하여 절대열위에 있다. 이러한 불리한 여건을 극복하기 위하여 중소기업의 혁신현장에 밀착된 지역의 전문가집단이 지역경제의 비전과 지역산업의 특수성을 고려하여 지역연구개발사업(地域硏究開發事業)을 전략적으로 기획하고 효율적으로 추진하며, 기획 추진과정에 참여하는 지역대학 지역시험연구기관 지역산업단체 등이 구성하는 지역사회(地域社會)의 협의체(協議體)가 정보공유(情報共有)와 공동학습(共同學習)을 통하여 지역혁신체제의 형성을 주도하고 경쟁과 협력의 조화를 통하여 기술혁신을 가속시키는 지역사회(地域社會)의 규범(規範)과 문화(文化)가 정착되도록 노력하며 중앙정부는 지역연구개발사업에 대한 지원에서 투명하고 합리적인 평가기준을 제시하고 지역산업의 혁신성과에 의하여 지원을 차등화(差等化)하는 경쟁원리를 도입하여 지역사회의 합리적 의사결정을 유도해야 한다.

• The Journal of the Korea Contents Association
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• v.16 no.7
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• pp.207-220
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• 2016

Paradigm for supporting housing for low-middle income class has been changing from public rental housing to Housing Voucher. Housing Voucher started first in Seoul since 2010, and it has been expended to other areas in 2014. Given the dearth of previous research data, this study aims to analyze options determinants that the beneficiaries could consider in choosing their residential area. In this study, the researcher used for the research methods, a quantitative analysis by Geographically Weighted Regression (GWR) and Ordinary Least Square (OLS) has been conducted. As a result, the accessibility to social welfare centers, public transportation and job opportunities emerged main factors to for the Housing Voucher recipients in Seoul to choose their residential area. This is different results from previous research, which has two implications. First, reexamination of Housing Voucher is necessary. Second, Housing Voucher beneficiaries should include not only the housing but also support for family and welfare system access.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.34 no.8
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• pp.791-797
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• 2010

The reliability of a water meter for measuring the water flow-rate and subsequent analysis of the measured water depends on the accuracy of measurement. The under registration of a water meter causes many problems for operators, such as loss in revenue and a decrease in the rate of measured water. The purpose of this study is to support and development core technology, such as efficient operations management and adoption of the best mechanism for providing different services by experimentally. In this study, experiments were conducted using water meters with different diameters, manufacturers, years of usage and the specific uses. On the basis of the results, the water meter confirmed that the error of minimum flow rate which will use long becomes larger more in the direction of minus.

• Journal of the Korean Society of Radiology
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• v.11 no.1
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• pp.1-8
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• 2017

The U.S. NRC establishes a radiological criteria with regard to restricted or unrestricted use of nuclear plant site after decommissioning in NUREG-1757. According to this, a nuclear plant site can be released in a restricted way or unrestricted way only if a licensee demonstrates that the dose criteria is fulfilled after the site decontamination and remediation. In order to prove compliance with the radiological criteria of site release, LTP(License Termination Plan) must include the site release criteria, site characterization, final survey plan with major radionuclides and DCGL(Derived Concentration Guideline Levels), etc. Based on the decommissioning case of Rancho Seco nuclear power plant in the United States, this paper analyzed a method of setting the DCGL that can be applied to Kori NPP Unit 1 which will be permanently disabled in 2017.

• Journal of Broadcast Engineering
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• v.21 no.2
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• pp.210-218
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• 2016

In this study VOD usage patterns(VOD use and paid amount) of IPTV users were investigated reflecting the level of media use characteristics such as TV viewing time, star preference, and genre preference. Also the impact of media using characteristics and the evaluation of guide channel on the intention to use VOD was analyzed. The web survey was conducted against the respondents who have used VOD and guide channel. The results are as follows. Among the media usage characteristics, star preference has the impact on the VOD use, while genre preference has relation to the willingness to pay for VOD. Secondly, the intention to view the guide channel, entertainment of the channel, and the users' genre preference have significant impacts on the intention to use VOD. Therefore, it is necessary to raise the viewing rate of guide channel by providing the customized promotion strategy and diverse events based on the analysis of VOD usage.

• Convergence Security Journal
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• v.10 no.4
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• pp.93-99
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• 2010

Smart TV, Internet content and interactive services are available, the operating system to mount the Web, App Store, you can enjoy a variety of content. Smart TV market, TV replacement cycle is long, watching for changes in the way copyright issues such as adaptation period and, unlike the case of a smart phone TV market in the short term are expected to occupy will not find, if IPTV, satellite, cable and real-time TV platform for broadcasters to adopt a smart, smart TV market could spread more quickly than expected. Long term, Google, Apple, TV gajeonsa and broadcasters to compete with various companies through the process of expanding the TV market is smart, the media are expected to dominate the market. Smart TV with the latest technology-related research and to investigate the Smart TV, Smart TV is designed based widgets. Widgets on the desktop, mobile, IPTV, etc. can be implemented in various environments and various features and types of users already are using the widget. In particular the advantages of the widget can be implemented to meet the needs of the users, because users to more efficiently and meet their desired widget. In this paper, propose Smart-TV-based Baby management widget.

• 한국IT서비스학회:학술대회논문집
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• 2008.11a
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• pp.535-540
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• 2008

It is a fact that we are yet to recognize and sense the U-City even though the business of U-City construction has been started many years ago. One of the causes is that UCity was thoughtlessly developed in the industry-centered environment for a tangible achievement, despite of need on more systematic development and organized management. Fortunately, it is expected that the most part of the situation will be solved, since "laws on the construction of the ubiquitous city" for planning, construction and management has been promulgated on March, and U-City project will be systematically promoted by the related laws from now. Therefore, intention of this study is the sustainable development of the U-City by analyzing the previous process and problems of the U-City Construction project of local governments and reengineering U-City construction project process in accordance with new laws, using the BPR methodology.

• Journal of the Economic Geographical Society of Korea
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• v.21 no.3
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• pp.231-253
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• 2018

This paper aims at analyzing ways to utilize the capital market for expanding housing welfare, focusing on the case of the affordable housing REITs in the United States. The main results of this study are as follows. First, the United States converts the keynote of its housing welfare policy to the provision of affordable housing, through private operators, and operates various support systems, including the LHITC program for them. Second, under this institutional framework, the use of capital markets for affordable housing is actively carried out, especially through the provision of affordable housing REITs such as CDT and AIMCO. Third, the public- driven housing REITs model and the private-led housing REITs model were proposed as ways to utilize the capital market through affordable housing REITs in Korea. Finally, policy improvement ways were proposed to promote the use of the capital market of affordable housing REITs.