• The Journal of Korean Institute of Communications and Information Sciences
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• v.34 no.2A
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• pp.132-138
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• 2009

Cognitive radio is considered as a promising solution to scarce spectrum problem. The primary object of cognitive radio is to increase spectral efficiency, while causing limited interference to primary users who are using the spectrum. Hence, an essential part of cognitive radio systems is spectrum sensing which determines whether a particular spectrum is occupied or not by a primary user at a particular time. However, sensing decision of each individual secondary user alone may not be reliable enough due to shadowing and multipath fading of wireless channels. The so called hidden terminal problem makes the problem even worse, possibly yielding undesired interference to the primary users. Recently, cooperative spectrum sensing is emerging as a remedy to these problems of individual sensing. Cooperative sensing allows a group of secondary users to share local sensing information to extract a global decision with high fidelity. In this paper, we investigate a cooperative spectrum sensing algorithm based on hard decisions of local sensing outcomes. Specifically, we propose an effective scheme for combining local decisions by introducing weighting factors that reflect reliability of the corresponding secondary user. Through computer simulations, the performance of the proposed combining scheme is compared with that of the conventional scheme without weighting factors in various environments.

• Journal of the Korean Society for information Management
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• v.9 no.2
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• pp.80-96
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• 1992

This Study attempts to treat the establishment of description level of comp0nent.s in building up a database on the art. The Study reveals that the art -database should be realized on imngebase and its components are to be described by stages with established pertinent level which is attained from the consideration of the information -creating -en\ w-onment.

• Land and Housing Review
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• v.5 no.2
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• pp.57-68
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• 2014

As social needs are increasing to minimize the occurrence of external effect due to urban development and to diffuse the benefits of development to surrounding areas, diverse cooperative planning methods are increasingly being discussed. In the long term, laws and systems need to be refined to support cooperative planning, but prior to such development, elements, procedures, and methodologies wherein cooperative planning in U.S.A cases could be implemented were examined to derive the alternative to and implications of cooperative planning that can apply not only to single administrative districts but also to complex boundary new towns being developed by various local governments. This paper surveyed and analyzed the cases of Wisconsin State of the U.S.A, thereby deriving the following implications. First, joint planning areas should be established within the boundary area of various local governments to establish cooperative planning areas in special areas such as complex boundary new towns, and to this end, urban planning means should be prepared. Together with such efforts, to boost the flexibility of cooperative planning, life sphere unit-based planning unit should be established, and a well-organized operation system to activate communities should be prepared. Also, revenues, generated through regional growth, should be distributed to individual local governments through joint tax according to the agreed-upon ratios, and as such, measures to share services and operate joint tax in small-size regions should be secured. Together with such efforts, to establish cooperative governance, measures to manage conflicts through the participation by stakeholders and arbitrators should be prepared from the planning stage, and measures for implementing cooperative planning at the level of basic urban planning should be prepared.

• Journal of Technology Innovation
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• v.19 no.2
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• pp.153-184
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• 2011

This paper investigates what kind of technological partner firms want to cooperate with in terms of partner location. Two geographical factors are considered. One is geographical proximity, given the tradeoff between the effectiveness of knowledge spillovers in proximity and diverse knowledge absorption from geographically distant partners. The other is how many other firms are co-located with potential partners because it is known that clustering regions can create more technological outputs. Analysis on 2008 Korea Innovation Survey data finds that partner proximity is the single most important factor in choosing a cooperation partner. While firms that are located in a region crowded with related industries prefer proximate partners, others that are surrounded by unrelated industries are more likely to cooperate with distant partners. The findings suggest that geographical proximity matters in partner selection because it not only stimulates knowledge spillovers but also reduces costs involving R&D cooperation such as monitoring costs and information costs. Moreover, firms take into consideration both the benefits and risks of clustering regions. If there are so many unrelated firms that they create agglomeration diseconomies such as congestion costs and unintentional knowledge leakages, firms are more likely to try to find their cooperation partners in other regions.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2012.06a
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• pp.263-265
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• 2012

본 연구는 공급 체인 관리 및 물류 개발에 RFID 기술의 활성화 역할을 제공합니다. 또한, 연구 결과는 국제 물류의 RFID의 최근 응용 프로그램을 공개하고 협력 업체 간의 RFID 널리 채택 및 사용의 핵심 요소로 이유를 분석합니다.

• Defense and Technology
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• no.10 s.152
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• pp.52-57
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• 1991

산.학.연 기술협력 증진과 핵심요소기술의 국내기반 구축을 도모하기 위한 제1차 유도무기 유도조종 학술대회가, 8월 23일 국과연에서 2백여명의 관계인사들이 참석한 가운데 열렸습니다. 이번 학술대회에서는 유도, 관성항법 등 6개 부문에서 9편의 논문이 발표되었으며, "최초의 일반 공개"라는 점에서 주요 자료로서의 가치가 높다고 사료되어, 5개를 발췌하여 소개합니다

• 정보보호뉴스
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• s.124
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• pp.24-25
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• 2008

정보보호에 있어 다양한 정보수집과 공유는 가장 기본적이고 필수적인 요소다. 정보공유와 협력은 사이버 공간의 안전을 책임지는 KISA에게 가장 중요한 부분이며, 실제로 KISA에서는 광범위한 정보 수집을 위해 많은 기업.기관들과 끊임없이 정보를 교류하고 있다. 대응지원팀은 KISA가 침해사고 예방과 신속한 대응을 위한 정보교류, 즉 정보 네트워크의 중심에 서 있을 수 있도록 활약하는 팀이다.

• Broadcasting and Media Magazine
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• v.21 no.2
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• pp.20-29
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• 2016

스마트폰의 등장과 더불어 융합은 매우 중요한 주제가 되었다. 이 글에서는 융합 미디어의 중요한 분야중의 하나인 뉴미디어 아트에서의 기술과 예술의 결합과 공생 가능성을 검토하고 테크놀로지와 예술의 협력의 역사와 트렌드에 대하여 고찰하며 컴퓨터로 대표되는 인공지능과 여러 뉴미디어 기술에서의 다양한 인문학 및 예술과의 연결점을 모색하며 인간과 기계의 공생을 위한 토대를 검토하고 예술의 확장에 기술의 요소가 어떤 역할을 할 수 있는지를 검토하고자 한다.

• Journal of Korea Game Society
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• v.17 no.4
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• pp.37-46
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• 2017

Gamifications offer utilities that may have potential to support convergence to become more engaged on their filed. This paper aims to design and implement gamification for the supporting of environment education based on the extended cooperation. We describe game mechanics, the system architecture, and its MDA model, finalizing with a small conclusion. We also discuss the implications of our work for the gamification that support the identified features and activate environment education. The result will be a framework for designing a gamification system that is suited for environment education. Ease, familiarity, relatedness, comfort, and usefulness were confirmed by the opinion polling. Our prototype has updated by reflecting their views and opinions.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.20 no.2
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• pp.75-89
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• 2009

This study propose the union cataloging based on wiki cataloging method which guarantee the quality of imported bibliographic data by outsourcing. Wiki cataloging means to improves a quality of union catalog used the cooperation of librarians who have the knowledge and experience to the cataloging. The methods are 1) policy of wiki cataloging 2) development of wiki systems 3) establishment of wiki cataloging rule based on advanced librarian cooperation. Especially, advanced librarian take charge of an 245, 260, 300 fields as basic bibliographical elements, general librarians participate expanded fields.