• Proceedings of the Korean Information Science Society Conference
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• 2006.10c
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• pp.297-302
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• 2006

데이터 통합은 기업의 각 조직과 주요 업무, 핵심 애플리케이션에서 발생하는 물리적인 데이터 소스들을 표준 규칙과 메타데이터에 여과시켜 중복성을 제거하고. 오직 데이터 통합 및 단일 뷰를 정확하게 제공하기에 어려움이 따른다. 특히, 이기종 시스템이나 다양한 애플리케이션에서 나오는 대량의 데이터를 종류와 형식에 관계없이 호환이 가능하도록 지속적으로 통합하여, 정확한 정보를 실시간으로 동기화하여 제공할 수 있는 자동화된 정보의 통합이 관건이다. 따라서 본 논문에서는 레거시 시스템간의 데이터를 협업할 때 실시간으로 변화는 데이터를 일관성 있게 유지하기 위해서 데이터 협업 메커니즘을 제안한다. 또한 XMDR을 이용하여 협업에 의한 데이터 통합에서 발생하는 의미적 상호 운용성의 문제점을 해결하는 XMDR 기반의 데이터 허브 시스템을 구축한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2014.05a
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• pp.380-383
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• 2014

Hub BLDC (Brushless Direct Current) motor is a multi-pole outer rotor-type high-efficiency electric motors and the Direct Drive Motor having permanent magnet rotor to drive shaft of the wheel, also called wheel-in motor. In this study, we design a speed controller with vector control technique using the dsPIC30f2010 16 bit micro-controller to drive Hub BLDC motor. Especially, we propose vector control method which reduce complex operation time, and design directly MOSFET inverter directly which gain high economics.

• Journal of Korea Far Infrared Association
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• s.30
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• pp.52-60
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• 2006

• Journal of Korean Electronics
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• v.25 no.3
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• pp.27-29
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• 2005

• Journal of Advanced Marine Engineering and Technology
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• v.27 no.5
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• pp.565-574
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• 2003

• Journal of Korean Electronics
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• v.25 no.8
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• pp.36-39
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• 2005

• International Commerce and Information Review
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• v.14 no.3
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• pp.209-227
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• 2012

Northeast Asia where is an epicenter of the global financial crisis's conquest is traditional imbalanced region of oil production and consumption. In recent years, the region has been suffered by the shortage of oil storage and transportation facilities due to surging oil trading and necessity in strategic reserves. Therefore, since independent petroleum logistics with the storage facilities and oil trading hub is required to form efficient oil market in this region. In this study, we analyzed the efficiency of refinery facilities by country that is of importance in being a logistics hub in Northeast Asia by employing non-static and dynamic efficiency analysis, which are a part of DEA(Data Envelopment Analysis) and then policy implications have been drawn. The result illustrates Korea's is the highest country in terms of efficiency of oil refining facilities in Northeast Asia. It implies that Korea has strong position to be the oil hub in Northeast Asia.

• Journal of the Economic Geographical Society of Korea
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• v.12 no.4
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• pp.540-556
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• 2009

The hub and spoke network is a critical network-based infrastructure that is widely applied in current transportation and telecommunications systems, including Internets, air transportation networks and highway systems. This main idea of hub location models is to construct a network system which achieves the economy of scale of flows. The main purpose of this study is to introduce new hub location problems that take into account network reliability. Two standard models based on assignment schemes are proposed, and a minimum threshold model is provided as an extension in terms of hub network design. The reliability and interaction potentials of 15 nodes in the U.S. are used to examine model behaviors. According to the type of models and reliability, hubs, and minimum threshold levels, relationships among the flow economy of scale, network costs, and network resiliency are analyzed.

• Proceedings of the Korean Information Science Society Conference
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• 2002.10e
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• pp.337-339
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• 2002

본 논문에서는 유선 인터넷상에서 소규모 여러 인터넷 상점들이 정보를 공유하고, 통합된 서비스를 제공함으로써 고객의 인지도를 높이기 위한 방법으로 등장한 기존의 허브(Hub)사이트와 모바일(Mobile) 인터넷이 결합된 M-Commerce 환경에서 고객에게 실시간으로 개인화된 맞춤 정보를 제공하기 위한 기법을 제안한다.

• International Commerce and Information Review
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• v.11 no.2
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• pp.127-145
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• 2009

With increase in oil demand owing to economic growth in Northeast Asia, the establishment of an oil hub in Korea is recently considered by policy and academic circles. This paper aims to suggest strategic schemes on the establishment of Korea's oil hub in Northeast Asia by comparing Korea's conditions as an oil logistics hub with Singapore which has been an oil hub in East Asia until recent year. Quantitative and qualitative analysis methods were employed in order to examine the competitiveness of Korea's oil hub. This research concludes that Korea is very competitive as an oil logistics hub in Northeast Asia, but so much improvements for realizing the project are necessary such as expansion of storage facilities for oil, institutional instruments for facilitating oil logistics and trading and preparation for incentive schemes on foreign investments in oil and its related industries.