• 한국산학기술학회:학술대회논문집
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• 한국산학기술학회 2006년도 추계학술발표논문집
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• pp.172-175
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• 2006

Owing to the strike of lighting a breakage of insulator would happen. This breakage may give rise to many problems such as increment of reclosing failure, a drop for reliance and a hardship of maintenance and repair. To solve those problems, this study develop a protected equipment for insulator which is suitable to 22.9kV distribution line towers and is purposed to investigation for a proper adaption, protection efficiency of insulator and effect of adaption.

• 로봇학회논문지
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• 제3권4호
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• pp.345-350
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• 2008

This study aims to propose the concept design of oil spill protection robot which can rapidly intervene to control the oil spillage situation at the sea. Taking into account the fact that a huge amount of oil is transported trans-continentally by oil tanker, none of industrialized countries are completely safe from the marine oil spill which results in social, economical and ecological damages to their communities. The employment of double hull-oil tanker, pipe line transporting can be most safe way. Yet complete prevention of oil spill is probably not realistic. Accordingly the alternative solution to control marine oil spill and minimize the damages caused by the incident using intelligent robot technology based on swarm control method is proposed. The main features of oil spill protection(OSP) robot is explained via following three perspectives. Firstly, from functional point of view, OSP robot system safely and efficiently replaces oil boom installation manually conducted by human workers with intelligent robot technology based on swarm control theory. For second, its modular architecture brings efficient storage of main components including oil boom and facilitates maintenance. For the last, its geometric form and shape enables whole system to be installed to helicopter, boat or oil tanker itself with ease and to rapidly deploy the units to the oil spill area.

• Journal of Radiation Protection and Research
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• 제10권1호
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• pp.41-49
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• 1985

1,300 MWe 가압경수로 공동내에서 중성자의 흐름해석이 수행되었다. 중성자의 흐름을 해석하는데는 1차원 수송코드인 ANISN, 2차원 수송코드인 DOT3.5, 3차원 Monte Carlo 코드인 TRIPOLI-02와 이들을 접속시켜주는 DOTTRI 등의 전산코드가 이용되었고, 본 계산에 사용된 전산기는 IBM 3033형이었다. 계산된 선속 및 선량율은 900 MW 가압경수로의 공동내에서 측정한 측정치와 비교검토 되었고, 그 결과 중성자 군별로 약간의 오차는 있었으나 전체적으로 큰 오차는 없었다. 이 결과는 대용량의 원자로 차폐설계, 원자로보수시, 기타 원자로 공동내에 출입할 경우에 방사선방어상 필요한 방어수단을 제공하는데 기여하였다.

• 대한전기학회논문지:전력기술부문A
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• 제53권4호
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• pp.221-226
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• 2004

Power system has recently used Double-circuit Line and Multi-circuit Line in the industrial development. This has an advantage of system stability and reliability, but the complexity of the system has a disadvantage that makes it difficult to protect the power line. Double-circuit Line has two operation conditions in the Single-circuit operation and Double-circuit operation, so it has mutual impedance. To make it possible for the remaining single-line to operate independently while there is a fault with first line or when maintenance is needed, a trip region for the single-circuit operation should be set in order to set the relay trip region. An optimal trip region for each operation, a different operational conditions for the relay setting should be calculated. In this paper, trip regions of each operation condition have been compared by considering mutual impedance and fault resistance that led to the calculation of fault impedance. Also, as we know that one of the advantages in the distance relay is the back-up protection, we calculated the trip region(Zone-2) in consideration of the mutual impedance.

• 대한전기학회논문지:전기기기및에너지변환시스템부문B
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• 제53권4호
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• pp.221-221
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• 2004

Power system has recently used Double-circuit Line and Multi-circuit Line in the industrial development. This has an advantage of system stability and reliability, but the complexity of the system has a disadvantage that makes it difficult to protect the power line. Double-circuit Line has two operation conditions in the Single-circuit operation and Double-circuit operation, so it has mutual impedance. To make it possible for the remaining single-line to operate independently while there is a fault with first line or when maintenance is needed, a trip region for the single-circuit operation should be set in order to set the relay trip region. An optimal trip region for each operation, a different operational conditions for the relay setting should be calculated. In this paper, trip regions of each operation condition have been compared by considering mutual impedance and fault resistance that led to the calculation of fault impedance. Also, as we know that one of the advantages in the distance relay is the back-up protection, we calculated the trip region(Zone-2) in consideration of the mutual impedance.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1999년도 봄 학술발표회 논문집(I)
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• pp.129-134
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• 1999

Recent construction activities and maintenance of marine facilities have been accelerating to keep up with rapid economic growth in Korea. Marine concrete structures are to salts and chloride from ocean environments. The corrosion of reinforcement steel caused by chloride-penetration into concrete may severely affect the durability of concrete structures. the objective of this research is to develop a durable concrete by investigating the resistance of various corrosion protection systems utilizing different water/cement ratio, silica fumes, corrosion inhibitors, etc. A two-year verification test on various corrosion protection system has been doing in the laboratory. Corrosion investigations on reinforcement steel are now under progress for more than 63 concrete specimen. Corrosion-related measurements include microcell corrosion current.

• Corrosion Science and Technology
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• 제14권1호
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• pp.12-18
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• 2015

Since the operation period of nuclear power plants has increased, the degradation of buried pipes gradually increases and recently it seems to be one of the emerging issues. Maintenance on buried pipes needs high quality of management system because outer surface of buried pipe contacts the various soils but inner surface reacts with various electrolytes of fluid. In the USA, USNRC and EPRI have tried to manage the degradation of buried pipes. However, there is little knowledge about the inspection procedure, test and manage program in the domestic nuclear power plants. This paper focuses on the development and build-up of real-time monitoring and control system of buried pipes. Pipes to be tested are tape-coated carbon steel pipe for primary component cooling water system, asphalt-coated cast iron pipe for fire protection system, and pre-stressed concrete cylinder pipe for sea water cooling system. A control system for cathodic protection was installed on each test pipe which has been monitored and controlled. For the calculation of protection range and optimization, computer simulation was performed using COMSOL Multiphysics (Altsoft co.).

• 인터넷정보학회논문지
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• 제17권4호
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• pp.95-113
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• 2016

주민번호를 포함한 개인정보의 처리업무는 상당한 전문지식과 많은 비용이 소요되어 IT 전문 업체에 위탁 처리하는 경우가 보편화 되었다. 개인정보 관련 사고는 점차 증가하고 있으며, 사고 유형의 대부분은 수탁자에 의한 누출 혹은 유출에 의해 발생하고 있다. 개인정보보호 실태점검과 관리수준 진단 결과 공공기관에서의 수탁자에 대한 개인정보 사고 예방노력과 개인정보보호 관리체계 구축 노력이 시급한 상황이다. 본 논문에서는 개인정보 보호의 효율적 제고 방안에 대하여 연구하였다. 개인정보 처리 업무위탁에 대한 법률사항을 분석하고, 관리체계 구축을 위한 법률 기준 지표를 선택하여, 수탁자에 대한 개인정보보호 관리수준 분석 방안과 수탁자 개인정보보호 관리체계 강화 방안을 제시하였다. 개인정보보호 관리체계 강화 방안으로 수탁자 개인정보보호 관리체계를 제시하였고, 세 가지 법률 강화방안을 제시하였다. 본 논문에서는 개인정보보호 관리체계 강화 방안을 구성하기 위하여 공공기관의 대표적 개인정보 처리 위탁업무 중 IT유지보수, 고지서인쇄, 콜센터와 관련된 30개 수탁자들을 대상으로 설문조사를 통해 조사하였고, 강화 방안에 대한 문헌 근거를 제시하였으며, 개인정보 위탁자와 수탁자에 대한 FGI를 통해 강화방안에 대한 검증을 실시하였다.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2003년도 추계학술대회
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• pp.373-378
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• 2003

It is important that overheat protection of super heated tube in boiler operation and maintenance. The overheat of super heat tube can make damage and rupture of tube material, which causes accidental shutdown of boiler. The super heated tube overheat is almost due to the lack of uniformity of gas temperature distribution. There are two ways to protect overheat of super heated tube. The one is to control hot gas operation pattern which is temperature or flow distribution. the other is to control super heated steam flow distribution. The former is difficult than the later, because of control device design. In this paper steam flow control method which uses orifices is proposed to protect overheat of super heat tube.

• 한국컴퓨터정보학회논문지
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• 제6권4호
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• pp.110-118
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• 2001

본 논문에서는 인터넷에서 암호화 방법을 이용하여 소프트웨어의 불법사용을 방지할 수 있는 시스템을 설계하였다. 현재의 대부분 소프트웨어들은 저작권 보호를 위하여 Lock Key등과 같은 물리적인 장치를 사용하지 않고 사용상의 편의성 때문에 설치 암호를 입력하는 방식을 이용하고 있다. 따라서 암호만 알면 누구나 소프트웨어를 자유로이 이용할 수 있기 때문에 정품 소프트웨어를 구입한 사용자가 의도적으로 암호를 노출시킬 경우 라이센스 수량 이상으로 불법사용 될 수 있다. 본 논문에서 제안한 시스템을 이용할 경우 소프트웨어 사용자는 라이센스 수량만큼만 동시에 사용할 수 있음으로 소프트웨어의 불법사용을 원천적으로 봉쇄할 수 있다. 또한 소프트웨어 개발자는 판매 수량을 정확히 파악할 수 있음으로 경영에 도움을 받을 수 있고 소프트웨어 사용자는 개발자로부터 소프트웨어의 유지보수를 신속히 받을 수 있다.