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이영준(Lee Young-Jun),최종균(Choi Jong-Gyun),차경호(Cha Kyung-Ho),천세우(Cheon Se-Woo),이장수(Lee Jang-Soo),권기춘(Kwon Ki-Choon),정의진(Jung Ui-Jin) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-
The Railroad Safety Act"s regulation reads as follows. “The Minister of Construction and Transportation may qualify and authorize the product to guarantee performance and safety of parts, machine, and device used in Railway fields.” Another regulation reads as follows. “The guidelines about targets, standards, and procedures of Quality and Authority in first provision are decided as Ministry of Construction and Transportation Decree.” The software used in rail cars and facilities is considered as a railway product. Therefore, it is qualified and authorized for acquiring the safety of rail cars and facilities. The software businesses shall again a Quality and Authority for applying a software to the rail cars and facilities. This paper regulates some guidelines that are needed to develop a software. The procedures that a software developer performs are divided by plan, requirement, design, implementation, and maintenance. The procedures that a software verification person performs are classified by verification plan, requirement verification, design verification, implementation verification, testing verification, maintenance verification, and safety activity. The entire processes and detailed activities to develope and verify a software are described as new guidelines.
은 나노입자를 이용한 화학발광법에 의한 L-alanine의 정량
조해진 ( Hae Jin Jo ),장택균 ( Taek Gyun Jang ),최종하 ( Jong Ha Choi ),서정기 ( Jung Kee Suh ),전치완 ( Chi Wan Jeon ),김영호 ( Young Ho Kim ),이상학 ( Sang Hak Lee ) 한국공업화학회 2011 응용화학 Vol.15 No.1
A chemiluminescent method with silver nanoparticles for determination of L-alanine has been presented. The chemilumiscence intensity was further enhanced by silver nanoparticles in the luminol system by its catalytic role. The silver nanoparticles enhanced chemiluminescent method is applicable for the determination of an amino acid such as alanine. When alanine was introduced to the luminol system with silver nanoparticles, chemiluminescence intensity was reduced with the concentration of the added alanine. The effects of pH, concentrations of luminol, hydrogen peroxide and silver nanoparticles on the chemiluminescence intensity were investigated. The calibration curve for L-alanine was linear over the range from 6.60×10(-8) M to 4.00×10(-7) M, coefficient of correlation was 0.996 and detection limit was 3.5×10(-9) M under the optimal conditions of 4.0×10(-3) M, 4.0×10(-2) M, 4.0×10(-4) M, 12.8 for the concentration of luminol, H2O2, silver nanoparticles and pH, respectively.
원전용 다양성 제어기기의 Functional Coverage 분석
김규철 ( Kyuchull Kim ),오승록 ( Seung-rok Oh ),최종균 ( Jong-gyun Choi ),홍승일 ( Seung-il Hong ),배일호 ( Il-ho Bae ) 한국정보처리학회 2011 한국정보처리학회 학술대회논문집 Vol.18 No.2
원자력 발전소의 오작동이나 사고는 인명이나 재산상의 큰 피해를 초래하므로 엄격한 안전 기준을 적용하고 있다. 따라서 원자력 발전소의 안전성과 관련된 원전용 제어기는 높은 수준의 신뢰도와 안전도가 요구된다. 이를 위해 디지털 방식의 제어기에 PLC 방식의 제어기와 PLD 방식의 제어기를 사용하여 다양성을 얻고 있다. 본 논문에서는 PLD 방식의 원전용 트립제어기의 Functional Verification을 위하여 RTL 수준의 설계에 대한 Functional Coverage 분석을 사용하였다. 테스트벤치는 System Verilog에서 제공되는 클래스에 기반한 구조적 테스트벤치를 작성하여 사용하였다.
원전 안전필수 계측제어시스템의 주기적 자동고장검출기능에 따른 고장허용 평가모델
허섭(Seop Hur),김동훈(Dong-Hoon Kim),최종균(Jong-Gyun Choi),김창회(Chang-Hwoi Kim),이동영(Dong-Young Lee) 대한전기학회 2013 전기학회논문지 Vol.62 No.7
This study suggests a generalized availability and safety evaluation model to evaluate the influences to the system"s fault tolerant capabilities depending on automatic fault detection function such as the automatic periodic testings. The conventional evaluation model of automatic fault detection function deals only with the self diagnostics, and supposes that the fault detection coverage of self diagnostics is always constant. But all of the fault detection methods could be degraded. For example, the periodic surveillance test has the potential human errors or test equipment errors, the self diagnostics has the potential degradation of built-in logics, and the automatic periodic testing has the potential degradation of automatic test facilities. The suggested evaluation models have incorporated the loss or erroneous behaviors of the automatic fault detection methods. The availability and the safety of each module of the safety grade platform have been evaluated as they were applied the automatic periodic test methodology and the fault tolerant evaluation models. The availability and safety of the safety grade platform were improved when applied the automatic periodic testing. Especially the fault tolerant capability of the processor module with a weak self-diagnostics and the process parameter input modules were dramatically improved compared to the conventional cases. In addition, as a result of the safety evaluation of the digital reactor protection system, the system safety of the digital parts was improved about 4 times compared to the conventional cases.