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권용일 ( Yong-il Kwon ),정충희 ( Choong-heui Jeong ) 한국정보처리학회 2013 한국정보처리학회 학술대회논문집 Vol.20 No.1
블록정합을 이용한 객체 추적 시 다른 물체에 의한 부분적인 가림이나 잡음 등이 발생할 경우, 추적 성능이 매우 저하될 수 있다. 이는 단순히 두 영상의 밝기를 블록 단위로 비교하여 이동 위치를 판단하기 때문이다. 본 논문에서는 상기 문제점을 해결하기 위해, 객체의 움직임을 예측할 수 있는 필터를 적용한다. 예측된 위치와 가까운 곳에서 계산된 유사도에는 보다 높은 가중치를 곱하여 블록정합을 수행한다. 필터를 통해 예측된 객체 이동은 과거의 움직임을 반영하고 있으므로 일시적인 외란에 대해 추적 능력을 강인하게 한다.
김영미 ( Young-mi Kim ),정충희 ( Choong-heui Jeong ),김현수 ( Hyeon Soo Kim ) 한국정보처리학회 2008 한국정보처리학회 학술대회논문집 Vol.15 No.1
디지털 컴퓨터와 정보처리기술의 급속한 발전과 함께 산업계 전반적으로 아날로그 기술은 쇠퇴하고 디지털 기술로 전환되고 있다. 심지어 안전-필수 기능을 담당하는 원자력발전소의 계측제어시스템에서도 제한적으로 디지털 기술을 채택하여 사용하기 시작했다. 지금까지 소프트웨어의 신뢰도의 정량화에 대한 연구는 많이 이루어져 왔으나 소프트웨어가 가지는 특수성 때문에 연구결과에 대해 전문가들의 동의를 얻지 못하고 있는 상태이다. 원자력발전소에서는 확률적 안전성 평가(PSA)를 수행할 때 소프트웨어의 실패에 기인한 위험은 무시하고 있다. 하지만, 소프트웨어를 기반으로 한 디지털 시스템의 사용이 점점 늘어남에 따라 소프트웨어 신뢰도에 대한 정량화가 점점 더 요구되고 있다. 본 연구에서는 소프트웨어의 실패모드를 정의하고 해당 실패모드에 의해 사고가 발생할 확률을 베이지안 통계이론을 이용하여 정량화하였다.
강영두(Youngdoo Kang),정충희(Choong-Heui Jeong),정길도(Kilto Chong) 대한전기학회 2008 대한전기학회 학술대회 논문집 Vol.2008 No.10
In the case of unauthorized individuals, systems and entities or process threatening the instrumentation and control systems of nuclear facilities using the intrinsic vulnerabilities of digital based technologies. those systems may lose their own required functions. The dis loss of required functions of the critical systems of nuclear facilities may seriously affect the safety of nuclear facilities. Consequently, digital instrumentation and control systems, which perform functions important to safety, should be designed and operated to respond to cyber threats capitalizing on the vulnerabilities of digital based technologies. To make it possible. the developers and licensees of nuclear facilities should perform appropriate cyber security program throughout the whole life cycle of digital instrumentation and control systems. Under the goal of securing the safety of nuclear facilities. this paper presents the KINS' regulatory position on cyber security program to remove the cyber threats that exploit the vulnerabilities of digital instrumentation and control systems and to mitigate the effect of such threats. Presented regulatory position includes establishing the cyber security policy and plan, analyzing and classifying the cyber threats and cyber security assessment of digital instrumentation and control systems.
국내 원자력발전소 인적오류 저감을 위한 Crew Resource Management 교육훈련체계 개발
김사길(Sa Kil Kim),변승남(Seong Nam Byun),이동훈(Dhong Hoon Lee),정충희(Choong Heui Jeong) 대한인간공학회 2009 大韓人間工學會誌 Vol.28 No.1
The nuclear power industry in the world has recognized the importance of integrating non-technical and team skills training with the technical training given to its control room operators to reduce human errors since the Three Mile Island and Chernobyl accidents. The Nuclear power plant (NPP) industry in Korea has been also making efforts to reduce the human errors which largely have contributed to 120 nuclear reactor trips from the year 2001 to 2006. The Crew Resource Management (CRM) training was one of the efforts to reduce the human errors in the nuclear power industry. The CRM was developed as a response to new insights into the causes of aircraft accidents which followed from the introduction of flight recorders and cockpit voice recorders into modern jet aircraft. The CRM first became widely used in the commercial airline industry, but military aviation, shipboard crews, medical and surgical teams, offshore oil crews, and other highconsequence, high-risk, time-critical industry teams soon followed. This study aims to develop a CRM training program that helps to improve plant performance by reducing the number of reactor trips caused by the operators' errors in Korean NPP. The program is; firstly, based on the work we conducted to develop a human factors training from the applications to the Nuclear Power Plant; secondly, based on a number of guidelines from the current practicable literature; thirdly, focused on team skills, such as leadership, situational awareness, teamwork, and communication, which have been widely known to be critical for improving the operational performance and reducing human errors in Korean NPPs; lastly, similar to the event-based training approach that many researchers have applied in other domains: aircraft, medical operations, railroads, and offshore oilrigs. We conducted an experiment to test effectiveness of the CRM training program in a condition of simulated control room also. We found that the program made the operators' attitudes and behaviors be improved positively from the experimental results. The more implications of the finding were discussed further in detail.