• 한국경제지리학회지
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• 제11권3호
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• pp.319-333
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• 2008

정부의 R&D 정직은 직 간접적으로 혁신주체의 구성이나 공간적인 측면 등 다양한 파급효과를 가져온다. 한국 정부는 산업화와 함께 R&D 정책을 추진해 왔으며, 정부의 정책은 정부출연연구기관 중심의 연구개발 네트워크가 일부 지역에 집중된 공간적 결과를 낳았다고 지적된다. 본 연구에서는 정부 주도로 추진된 국가연구개발사업의 발전 과정을 살펴보고, 국가연구개발사업의 자료 분석을 통하여 참여 주체의 다원화와 네트워크의 지역화 경향이 실제로 이루어지고 있는가를 밝히고자 한다. 부처별 국가연구개발사업 네트워크를 분석한 결과, 과거 정부출연연구기관 중심으로 추진되어온 국가연구개발사업 네트워크에서 대학과 기업이 핵심주체로 추출되는 등 다원화가 이루어지고 있는 것으로 나타났다. 공간적인 측면에서는 일부 지역에 집중되어온 국가연구개발사업의 네트워크에 변화가 있는지 살펴보기 위해 16개 시도별 기업들의 네트워크를 분석한 결과, 대부분 전국 단위 혹은 수도권에 종속된 형태로 이루어지고 있음을 알 수 있다.

• 한국시스템다이내믹스연구
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• 제13권1호
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• pp.113-131
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• 2012

Applying social network analysis techniques, this study examines complex system characteristics of industry-university joint research R&D networks. In specific, it focuses on whether these R&D networks comply with the power law, whose system typically presents the-rich-get-richer and the-poor-get-poor patterns. The basic data come from 7,751 industry-university joint research projects, all of which were carried out by Daejeon, Chungbuk, and Chungnam-based universities from January 2005 to October 2008. The empirical results reveal that the R&D networks abide by the power law. That is, a handful of business units and universities command an overwhelming majority in the joint links, indicating positive feedback dominance within the system.

• Journal of the Korean Society for Industrial and Applied Mathematics
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• 제23권4호
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• pp.329-350
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• 2019

This paper examines individual and social strategies to form profitable cooperation networks. These two types of strategies measure network stability and efficiency that may not meet in a single network. We apply restrictions on knowledge flows (R&D spillovers) and links formation to integrate these benefits into structures that ensure high outcomes for both strategies. The results suggest that linking the spillovers to the firms' positions and restricting cooperation contribute to reducing the conflict between the individual and social strategies in the development of cooperative networks.

• 한국경제지리학회지
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• 제15권2호
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• pp.292-303
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• 2012

본 논문은 중국의 청도 가전산업이 군집되는 과정에서 나타나는 연구개발(R&D) 네트워크의 구조와 공간적 특징을 분석하고자 했다. 청도 가전산업의 연구개발 네트워크 분석 결과는 다음과 같다. 청도 가전산업은 정부 주도하의 대기업을 중심으로 인근 지역에 하청업체들이 집적을 이루고 있었지만, 청도 가전산업의 주요 기술혁신 요인인 대기업의 기업내부 자체 개발, 지역 내 타 기업과의 협력, 지역 내의 대학 및 공공연구기관과의 협력 수준은 낮게 나타났다. 청도 가전산업 대기업은 이와 같은 단점을 극복하기 위하여 지역적 협력보다는 지역 외 기업과의 협력을 적극 도모하고, 지역 외의 대학 및 연구기관과의 협력을 강화하는 전략을 선택하고 있다. 이는 청도 가전산업의 산학연 협력 네트워크가 아직 활성화되지 않았음을 의미한다. 청도에 가전산업을 중심으로 한 지역혁신체계가 구축되기 위해서는 지역 내 기업-대학-공공연구기관 간 긴밀한 네트워크가 이루어져 공동체적 지역 산업 분위기가 형성되어야 한다.

• International Journal of Internet, Broadcasting and Communication
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• 제15권4호
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• pp.128-133
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• 2023

Satellite based communication is networks in which users in a wide area can access without wired-based ground infrastructure. In particular, the need is emerging due to the recent Ukraine-Russia war. Satellite network systems acquire data that is difficult to observe on Earth as well as communication networks and are also used for research and development, which allows additional data to be produced. However, due to the nature of communication networks existing in outer space, certain vulnerabilities are revealed, and attacks based on them can be exposed. In this paper, we analyze vulnerabilities that may arise due to the nature of satellite communication networks and describes current research, countermeasures, and future research directions.

• 한국경제지리학회지
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• 제19권1호
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• pp.1-17
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• 2016

본 논문은 내국인 특허출원 자료에서 복수 발명자들의 주소지들을 파악하고 가산자료의 특성을 통제할 수 있는 영과잉 음이항 회귀모형을 사용하여 230개 시군구 간 발명자 네트워크의 공간구조와 그것의 결정요인을 분석한다. 발명자 네트워크의 공간적 연계에 영향을 미치는 몇 가지 요인들이 확인된다. 이출지역이 민간 R&D, 고등교육수준, 인구규모, 특허 생산성 등과 같은 R&D 관련 지역 특수적 자산들을 많이 보유하면 동태적인 수요효과를 통해 공간적 연계는 다른 지역으로 확대된다. 그리고 물리적 거리뿐만 아니라 기술적 거리에서도 거리조락현상이 나타난다. 이입지역이 R&D 관련 지역 특수적 자산을 많이 보유하면 유사한 논리로 공간적 연계에서 정(+)의 효과가 발생한다.

• 지역연구
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• 제13권2호
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• pp.55-74
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• 1997

This paper investigates the spatial characteristics of networks, which arise as a firm's strategy to enhance its competitiveness to cope with the changing economic environments characterized by technological changes and increasing competitiveness. The theoretical framework in this study proposes that networks emerge as a firm's strategies to promote its competitiveness through the vertical/horizontal disintegration of the production system. Futhermore, regional industries of networks. The study examines the types of cooperation and the spatial boundary of the computer industry networks in Korea. Questionnaire survey was conducted on 1, 128 computer companies which had more than 10 employees, with 126 questionnaires being used for analysis. In addition, newpaper articles were used to supplement the foregoing work on network characteristics. The review of these articles covers the period from Jan. 1994 to June 1996. Major findings of this study are as follows: The spatial range of cooperative networks varies according to the specific characters of cooperation(R & D, production, and seles). Intralocal networks are being developed in Kangnam and Youido area, the computer industry agglomeration clusres of Seoul. There are the regional differnces in the agents and contents of cooperation. In intra-national R & D and production networks, regional differnces in agglomeratins and non-agglomerations are not detercted. Most networks of this type are found between large firms and small firms. In contrast, foregn R & D and production networks, which are operated mostly by large firms, are found in Kangnam, Youido, and CBD. Intra-national and foreign productino networks are also focused in Kangnam, Youido, and CBD. Small firms are playing an active role in making this type of cooperation possible. In the perspective of localization-globalization, Korean computer industry can be analyzed in two respects: industrial and regional. The localization of small firms and the localization-globalization of large firms' networks are being developed in industrial contexts, while the localization-globalization of agglomerations and the localization of non-agglomerations networks are being developed in regional contexts. As networks for the localization-globalization of industry are growing in agglomerations, interfirm networks could be related to trends in the formation or intensification of industrial agglomerations. industrial agglomeration areas function as a facilitator of localization through subcontracts, intraregional network and interregional network. They also facilitate globalization via foregn networks. In non-agglomeratin areas, localization networks, which are connected with agglomeration areas via subcontracting, interregional R & D. or production cooperation.

• ETRI Journal
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• 제38권1호
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• pp.185-194
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• 2016

In this paper, a novel rate control scheme for low delay video coding of High Efficiency Video Coding (HEVC) is proposed. The proposed scheme is developed by considering a new temporal prediction structure of HEVC. In the proposed scheme, the relationship between bit rate and quantization step is exploited firstly to formulate an accurate quadratic rate-quantization (R-Q) model. Secondly, a method of determining the quantization parameters (QPs) for the first frames within a group of pictures is proposed. Thirdly, an accurate frame-level bit allocation method is proposed for HEVC. Finally, based on the proposed R-Q model and the target bit allocated for the frame, the QPs are predicted for coding tree units by using rate-distortion (R-D) optimization. We compare our scheme against that of three other state-of-the-art rate control schemes. Experimental results show that the proposed rate control scheme can increase the Bjøntegaard delta peak signal-to-noise ratio by 0.65 dB and 0.09 dB on average compared with the JCTVC-I0094 and JCTVC-M0036 schemes, respectively, both of which have been implemented in an HEVC test model encoder; furthermore, the proposed scheme achieves a similar R-D performance to Wang's scheme, as well as obtaining the smallest bit rate mismatch error of all the schemes.

• 지식경영연구
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• 제19권3호
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• pp.189-223
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• 2018

This paper examined the effect of innovation networks comprising research and development (R&D) collaboration on innovation performance of Korean pharmaceutical firms. As co-assigned patents and co-affiliated publications are common technical outcomes of successful R&D collaboration in the pharmaceutical industry, social network analysis technique was applied for analyzing innovation networks through patent and publication data. Results of Social network analysis indicated that a small set of highly innovative firms in the Korean pharmaceutical industry were actively involved in patenting and publishing. And the analysis of structural equation model found the followings: (1) R&D intensity significantly affected patenting, publication and new drug development, (2) the activity of patenting and publishing was positively related with the innovation performance measured by new drug development, and (3) R&D collaboration in terms of degree centrality of co-patent network played significant moderating roles on the relationships among R&D intensity, patenting, and new drug development. These findings are expected to be helpful to researchers as well as policy-makers to devise innovation-promoting policies in the Korean pharmaceutical industry. Discussions and limitations of the study are provided in the last part.

• 센서학회지
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• 제28권5호
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• pp.277-283
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• 2019

In this paper, we propose a distributed fusion estimation for sensor networks using a receding horizon strategy. Communication channels were modelled as Markov jump systems, and a posterior probability distribution for communication channel characteristics was calculated and incorporated into the filter to allow distributed fusion estimation to handle path loss observation situations automatically. To implement distributed fusion estimation, a Kalman-Consensus filter was then used to obtain the average consensus, based on the estimates of sensors randomly distributed across sensor networks. The advantages of the proposed algorithms were then verified using a large-scale sensor network example.