• Journal of Advanced Navigation Technology
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• v.15 no.6
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• pp.1059-1067
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• 2011

Next-Generation ITS environment requires high-speed data packet transmission, security, authentication, and hand-over supportable for driving vehicle on road by installing RSEs and OBUs. Therefore, wireless communication technology for next-generation ITS services are advancing to 200km/h maximum speed supportable, 1km communication radius, minimum 10Mbps hish-speed datarate for multimedia data(such as text, images, movie clips and so on) supportable, high reliability. In this paper, we implemented WAVE communication system which based on IEEE 802.11p PHY/MAC and evaluated that the system meets next-generation ITS environments.

• Proceedings of the KSR Conference
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• 2011.10a
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• pp.2031-2036
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• 2011

To leading subway technology Advanced Urban Transit System is developed by national research and development. Next-generation trains equipped with direct driving permanent magnet traction motor and individually controlled propulsion system. Electromagnetic properties of the Next-Generation Train from four perspectives will be discussed. The first is closely related to human hazards that affect the 60Hz low frequency electromagnetic field. The Second is inductive noise that affect railroad signal system. The third is conductive noise that affect communication line near railroad. The 4th is radiation noise that may affect electronic equipment near the railroad tracks.

• Journal of the Korea Society of Computer and Information
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• v.22 no.10
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• pp.159-166
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• 2017

This study is a discussion of business process reengineering for the next generation information system. To be concrete, we analyze and reengineer the current business process in administration of academic, general and research. This reengineering is conformed by 5 steps, as analyzing environmental status that figures out factors of inside or outside (environmental analyzing), analyzing current condition that diagnoses AS-IS process (current situation analysis), establishing information-oriented vision with strategic accomplishing goals accordingly (visioning), deducing detailed improving tasks (defining tasks), and engineering TO-BE process comprehending improving matters (engineering model). This paper shows BPR model for next generation information system.

• Journal of Computing Science and Engineering
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• v.6 no.4
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• pp.310-319
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• 2012

Next generation wireless receivers demand low computational complexity algorithms with high computing power in order to perform fast signal detections and error estimations. Several signal detection and estimation algorithms have been proposed for next generation wireless receivers which are primarily designed to provide reasonable performance in terms of signal to noise ratio (SNR) and bit error rate (BER). However, none of them have been chosen for direct implementation as they offer high computational complexity with relatively lower computing power. This paper presents a low-complexity power-efficient algorithm that improves the computing power and provides relatively faster signal detection for next generation wireless multiuser receivers. Measurement results of the proposed algorithm are provided and the overall system performance is indicated by BER and the computational complexity. Finally, in order to verify the low-complexity of the proposed algorithm we also present a formal mathematical proof.

• KIEE International Transactions on Power Engineering
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• v.3A no.1
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• pp.7-16
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• 2003

A new method to evaluate the protection capability of distribution systems is reported in this paper. This work describes the fuzzy evaluation attributes and aggregation method of evaluation results based on a hierarchical model and the modified combination rule. An evaluation grade index called "protectability" is proposed and is expected to be a very uscful tool in defining an optimal protection and realizing the adaptive protection.rotection.

• Proceedings of the KIEE Conference
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• 2006.07a
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• pp.169-170
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• 2006

In this paper, A new algorithm for load flow calculation is proposed for radial distribution network. Feeder Remote Terminal Unit (FRTU) is utilized to collect data such as current magnitude and angle of power factor at each node. Proposed algorithm is based on the model of distributed load in distribution system. Load flow calculation is using four terminal constants method.

• Proceedings of the KIEE Conference
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• 2005.11b
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• pp.70-72
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• 2005

변전소 내 IED의 신뢰도는 전력계통 운용과 보호에 매우 중요한 주제가 되었다. 또한, 서로 다른 회사에서 제작된 다른 기술을 이용한 IED들을 사용할 경우 신뢰도 유지에 힘든 것이 사실이다. 이를 해결하기 위하여 변전소 자동화의 구조 및 충신을 정의한 IEC61850이 제안되었다. 본 논문에서는 IEC61850기반의 변전소 자동화 시스템을 위한 새로운 신뢰도 향상 기법에 대해 제안한다 제안하는 방법은 패턴 검사를 통해 IED의 고장을 검출하고, 백업 IED와 소프트웨어 이동을 이용하여 결함을 극복하는 것이다.

• Proceedings of the KIEE Conference
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• 2002.11b
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• pp.62-64
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• 2002

Power quality monitoring system is devoted to more concern than before, because the innovation of industrial technology needs more accurate instruments and more advanced power quality. Therefore, this paper is proposed to use digital protective relays for power quality monitoring. In addition, taking power quality events, Electrical magnetic phenomenon of IEEE std 1159, proposing that adaptive power quality event list consider limitation memory capacity and signal processing ability of protective relay. The prototype S/W of power quality analysis is also developed. Especially this prototype S/W analysis scheme is verified through many kinds of power quality events (gathering protective relay data) in EMTP simulation.

• Proceedings of the KIEE Conference
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• 2003.07a
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• pp.366-368
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• 2003

In this paper, a parametric evaluation method of protection ability is proposed. The adequacy of every parameter is evaluated for the setting rules. Then the results are combined to give protection level of a whole protective system. The setting rules are categorized into three groups for hierarchical calculation. The proposed scheme is applied to a location problem of a new protective device to show its effectiveness.

• Proceedings of the Korean Society of Computer Information Conference
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• 2016.01a
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• pp.219-222
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• 2016

블록형 구조물의 구축은 완구의 목적으로 널리 사용되고 있으며 이외에도 제품 디자인을 위한 래피드 프로토타이핑 및 창의학습을 위한 도구로도 활용되고 있다. 본 논문은 블록형 구조물을 적은 비용으로 손쉽게 설계하고 구축하기 위하여 블록형 구조물 자동 생성 기능 및 편집 기능을 제공하는 소프트웨어 시스템을 개발하였다. 본 시스템을 이용하여 가상공간에서 자유롭게 블록형 구조물을 생성 및 편집할 수 있고, 실제 구조물의 조립을 위한 매뉴얼로 활용할 수 있다.