• 대한전기학회:학술대회논문집
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• 대한전기학회 2004년도 하계학술대회 논문집 B
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• pp.1489-1491
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• 2004

A guard lamp system has been installed at the PV positive center, located at Gwangju in Korea. Digital environment that is represented to internet is displacing business way of industry and business achievement way with the fast speed being giving great change on life whole, improve existence business process utilizing internet and Web connection technology, information superhighway to tradition industrialist manufacture and e-transformation's propulsion that wish to maximize productivity and administration efficiency is spread vigorously. In this paper, we wish to accomplish generation equipment's heighten stability and believability through remote monitoring and control of guard lamp system. This paper describes the design of the monitoring system for the sensing data and indirect controlling of the guard lamp system. Most of the conventional monitoring systems depend on the special hardware and software. The essential design of monitoring system is to provide the convenience for the user and the portability for the system. In order for the system to fulfill its requirements, it was designed using Labview GUI facility based on the Windows 2000 environment of IBM PC compatible and Add-oncard based on the TCP/IP Protocol. Advantage of the monitoring system are a personnel expenses curtailment effect, of the place restriction and unmanned system of the generationplants, etc..

• Nuclear Engineering and Technology
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• 제49권5호
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• pp.989-995
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• 2017

Distributed Control System (DCS) communication networks, which use Fast Ethernet with redundant networks for the transmission of information, have been installed in digitalized nuclear power plants. Normally, failover tests are performed to verify the reliability of redundant networks during design and manufacturing phases; however, systematic integrity tests of DCS networks cannot be fully performed during these phases because all relevant equipment is not installed completely during these two phases. In additions, practical verification tests are insufficient, and there is a need to test the actual failover function of DCS redundant networks in the target environment. The purpose of this study is to verify that the failover functions works correctly in certain abnormal conditions during installation and commissioning phase and identify the influence of network failover on the entire DCS. To quantify the effects of network failover in the DCS, the packets (Protocol Data Units) must be collected and resource usage of the system has to be monitored and analyzed. This study introduces the use of a new methodology for verification of DCS network failover during the installation and commissioning phases. This study is expected to provide insight into verification methodology and the failover effects from DCS redundant networks. It also provides test results of network performance from DCS network failover in digitalized domestic nuclear power plants (NPPs).

• 정보보호학회논문지
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• 제18권2호
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• pp.97-105
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• 2008

네트워크 내의 다양한 악성코드는 변종들이 빠르게 생성되고 그 행위는 점차 지능화되어 피해도 커지고 있다. 본 논문에서는 효과적인 악성코드 탐지를 위해 탐지규칙 생성에 효과적인 척도선정 방법을 제안한다. 실험에 헤더 정보만을 활용함으로써 페이로드 데이터를 검사하는 과부하를 최소화하였고, 패킷의 단순한 정보가 아닌 네트워크 연결정보인 다양한 척도를 사용하여 악성코드의 특징 파악을 용이하게 한다. 실험에 사용된 80개의 연결정보 중 유용한 탐지척도를 선정하기 위해 히스토그램 방법을 이용해 확률 분포를 구하고, 단순 추정량에 적용한 후, 상대 복잡도를 이용한다. 단순 추정량 방법은 기존 방법인 히스토그램 방법의 단점인 임의로 나눈 경계 부근의 값에 대한 오분류를 해결하고, 악성코드 탐지에 유용한 척도의 선택을 유도한다. 선정된 척도를 바탕으로 탐지규칙을 생성하고, 탐지실험을 하여, 그 결과를 기존 방법과 비교 평가함으로써 제안하는 기법이 유용함을 보인다.