• Journal of the Economic Geographical Society of Korea
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• v.15 no.4
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• pp.550-569
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• 2012

This paper studies the R&D network of the Zhongguancun Cluster, the most representative innovative cluster of the high-tech industry in China at present. For this study, Zhongguancun Cluster was the first high-tech cluster to have been created in China, the current Zhongguancun Cluster has played a leading role in the development of the high-tech industry in China. In addition, the Zhongguancun Cluster has at helped elevate China as a key region in terms of research development in relation to the high-tech industry. In particular, companies evaluate the research development network culture of Zhongguancun cluster positively and this increases their tendency to approach the research development network with an open mind. The main contents in research development network are as follows; (1) joint or consigned research development and technology transfer in the case of research development network between companies, (2) joint or consigned research development, human resource support and employment, technical advice and consultant and technology transfer in the case of industrial-educational relationships (3) joint or consigned research development, technical advice and consultant and technology transfer in the case of industrial-research relationships, (4) financial support and participation in joint research development project held by government in the case of industrial and governmental relationships (5) financing for research development, utilization of research human resources, purchase of research development and use of research development equipment for mediators. The main difficulties in creating a research development network are 'lack of mutual trust', 'financial problems of companies' and 'lack of information'. Especially, the main key obstacles for the most important research development network between industry and government in the case of the Zhongguancun Cluster are 'complicated and strict procedures. Therefore, more accurate and detailed understanding of the conditions and the following institutional measures from government are required for research development among companies.

• The KIPS Transactions:PartD
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• v.13D no.7 s.110
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• pp.867-878
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• 2006

In the past few years, the research of sensor networks is forced dramatically. Specially, while the research for maintaining the power of a sensor is focused, we are also concerned nth query processing related with the optimization of multiple continuous queries for decreasing in unnecessary energy consumption of sensor networks. We present the fragmentation algorithm to solve the redundancy problem in multiple continuous queries that increases in the count or the amount of transmitting data in sensor networks. The fragmentation algorithm splits one query into more than two queries using the query index (QR-4ree) in order to reduce the redundant query region between a newly created query and the existing queries. The R*-tree should be reorganized to the QR-tree right to the structure suggested. In the result, we preserve 20 percentage of the total energy in the sensor networks.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.45 no.5
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• pp.1-11
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• 2008

Wireless Sensor Networks is applied to improvement of life convenience or service like U-City as well as environment pollution, tunnel and structural health monitoring, storm, and earthquake diagnostic system. To increase the usability of sensor data and applicability, mobile devices and their facilities allow the applications of sensor networks to give mobile users and actuators the results of event detection at anytime and anywhere. In this paper, we present MUSNEMO(Multi-sensor centric Ubiquitous Smart sensor NEtwork using Mobile devices) developed system for providing more efficient and valuable information services with a variety of mobile devices and network camera integrated to WSN. Our system is performed based on IEEE 802.15.4 protocol stack. To validate system usability, we built sensor network environments where were equipped with five application sensors such magnetic, photodiode, microphone, motion and vibration. We also built and tested proposed MUSNEMO to provide a novel model for event detection systems with mobile framework.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.27 no.7A
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• pp.711-723
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• 2002

A finer granular scalable (FGS) version of ISO/IEC MPEG-4 video streaming is investigated in this work with the prioritized stream delivery over loss-rate differentiated networks. Our proposed system is focused on the seamless integration of rate adaptation, prioritized packetization, and simplified differentiation for the MPEG-4 FGS video streaming. The proposed system consists of three key components: 1) rate adaptation with scalable source encoding, 2) content-aware prioritized packetization, and 3) loss-based differential forwarding. More specifically, a constant-quality rate adaptation is first achieved by optimally truncating the over-coded FGS stream based on the embedding rate-distortion (R-D) information (obtained from a piecewise linear R-D model). The rate-controlled video stream is then packetized and prioritized according to the loss impact of each packet. Prioritized packets are transmitted over the underlying network, where packets are subject to differentiated dropping and forwarding. By focusing on the end-to-end quality, we establish an effective working conditions for the proposed video streaming and the superior performance is verified by simulated MPEG-4 FGS video streaming.

• Journal of Digital Convergence
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• v.9 no.2
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• pp.41-52
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• 2011

This paper alms to examine the impact of R&D organization culture to Technology Innovation in Small and Medium Enterprises. Hypotheses were tested by surveying 250 employees at R&D Gumi Industrial Complex. We conducted exploratory factor analysis for four constructs (diversity, autonomy, connectivity and flexibility) using oblique rotation method that did not assume independence among the factors and main factors of organizational culture in R&D organization were grouped together by four factors. The results of this study are as followings; First, three factors of R&D organizational culture had a significant positive effect on the product innovation and except autonomy. Second, two factors of R&D organizational culture had a significant positive effect on the process innovation except autonomy and flexibility. it is shown reliable criterion to effective organizational management for successful Technology Innovation in small and medium enterprises.

• Proceedings of the KIEE Conference
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• 2008.10b
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• pp.501-502
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• 2008

모바일 단말이 이종네트워크 환경에서 멀티미디어 데이터를 스트리밍 수신받으며 이동할 때, 특성이 다른 링크로 옮겨감에 따라 스트림의 전송률이 링크의 적정 대역폭을 초과하여 정상적인 전송이 되지 않거나 링크의 적정 대역폭을 미달하여 효율적인 전송이 되지 않을 수 있다. 본 논문에서는 SIP Mobility상황에서의 링크특성 정보 저달 방법을 고안하고, 전달받은 링크특성 정보를 통한 전송 조절 방법을 제안한다. 실제 RTP패킷 전송 실험을 통하여 스트리밍 전송 성능이 개선됨을 보인다.

• Proceedings of the KIEE Conference
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• 2005.07d
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• pp.2855-2857
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• 2005

디지털 선박(Digital Ship)이란 항해의 안전과 효율적 운행을 위해 항해, 조정, 상태감시 등 선박운행에 대한 전반적인 내용들을 컴퓨터를 통해서 구현하고 위성통신을 통해서 육상에서도 제어할 수 있는 완전 자동화 및 네트워크화 된 시스템을 의미하며 궁극적으로 무인화된 선박을 지향한다. 또한 통한항해시스템이란 선박의 경제적이고 안전한 운항을 위해 전자해도와 레이더를 이용하여 선박의 항로를 계획하고 감시하며 최적 항로 분석, 충돌/좌초방지 및 자동항법시스템과 연계한 자동항해 기능을 수행한다. 본 논문은 디지털 선박을 위하여 항해정보시스템과 항해 장비 통합장치 및 통신서버를 기반으로 한 전자해도와 레이더, 자동항법장치(autopilot) 및 각종 항해센서의 다기능 표시장치의 기능과 인터페이스 방안을 제시하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2014.11a
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• pp.190-191
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• 2014

국방 시뮬레이션 소프트웨어 개발 시 급변하는 요구사항과 반복적인 구현에 빠르게 대처하기 위해 플러그인 기반의 개발프레임워크가 사용되어왔다. 그러나 개발된 소프트웨어는 내부 컴포넌트의 재활용성은 증대되었으나, 수많은 노드가 연결되는 분산 시뮬레이션 환경에는 적합하지 못했다. 이에 기존의 개발된 데이터 모델인 NOM을 기반으로 객체 간 통신이 가능하고, 분산 환경에서 노드의 확장이 유연한 통신 미들웨어인 nComm+를 제안한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2010.11a
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• pp.1540-1542
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• 2010

국방분야의 무인지상무기체계(Unmanned Ground Vehicles)는 소프트웨어 결함 발생시 유인무기체계와 달리 응급 조치를 수행할 수 있는 사람이 탑승하지 않기 때문에 임무 수행에 치명적인 영향을 미칠 수 있다. 따라서, 무인지상무기체계에 탑재되는 내장형 SW의 신뢰성 있는 임무 수행을 위한 방법을 필요로 한다. 본 연구에서는 무선 Ad-hoc 네트워크로 연결된 UGV의 SW 결함을 원격으로 진단하고, 치료하기 위한 방법에 대해 연구하였다. 국방분야의 무인무기체계에 탑재된 내장형 SW의 신뢰성을 높이기 위해 적용가능하다.

• Proceedings of the Korea Information Processing Society Conference
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• 2022.11a
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• pp.228-230
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• 2022

딥러닝 기반의 인공지능 기술이 발달함에 따라 이상 탐지 방법에도 딥러닝이 적용되었다. 네트워크 트래픽으로부터 요약 및 집계된 Feature 를 학습하는 방법과 Packet 자체를 학습하는 등의 방법이 있었다. 그러나 모두 정보의 제한적으로 사용한다는 단점이 있었다. 본 연구에서는 Http Request에 대한 사전학습 기반의 효과적인 이상 탐지 방법을 제안한다. 사전학습에 고려되는 토큰화 방법, Padding 방법, Feature 결합 방법, Feature 선택 방법과 전이학습 시 Numerical 정보를 추가하는 방법을 소개하고 각 실험을 통해 최적의 방법을 제안한다.