• Proceedings of the Safety Management and Science Conference
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• 2002.05a
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• pp.23-30
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• 2002

최근 우리나라의 건설산업은 Project의 규모가 대형화됨에 따라 기계화 시공 신공법 도입등 공정작업이 다양해지고 새로운 방법들이 많이 시도되고 있으며 건설산업도 기획, 설계, 발주, 시공, 유지관리라는 연속적 단계를 통하여 각 단계가 상호 유기적 연관성을 가지므로 건설현장의 근원적 안전성 확보를 위해서 건설 시설물의 Life cycle 전 단계를 걸쳐 안전관리 개념과 기법이 도입되어야 한다. 따라서 본 연구에서는 CM에 의한 단계로 안전성 확보에 주력하고 미국 CMAA의 단계별 기능별(phase, 6Function) 업무내용에서와 같이 Safety Management를 한다. 또한 CM제도 정착에 따른 초기단계를 규정하는 안전관리 법령 재정을 하여 단계적으로 자율적 안전 관리를 유도하여 재해예방을 하도록 해야한다.

• Proceedings of the KSR Conference
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• 2008.11b
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• pp.1113-1125
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• 2008

In this paper we present a RAMS to be applied to the development of the Urban Maglev Train Signalling System. The RAMS that can be applied to the life cycle of a Signalling system, from the basic design to the dismantlement, shows the whole process of the paper work in detail through the establishment of a goal, analysis and assessment, the verification. In this paper we study about the making a plan, the preliminary hazard analysis, the hazard identification and analysis to guarantee the safety of the Signalling System. The process for the verification of the system safety is divided into several steps based on the target system and the approaching method. The guarantee of the system safety and the improvement of the system reliability is followed by the recommendation of the international standards.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.33 no.4
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• pp.1639-1650
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• 2013

Road pavement management is an important activity that affects to national economy, movement and safety of people, and also demands huge amount of budget. Therefore, its management strategy must be established under objective information. In addition, decision support system that produces the management strategy needs to consider practical benefits from various aspects. Considering these aspects, this paper aimed to develop a customized Korean life cycle cost analysis model estimating various effects on road users and socio-environmental costs based on pavement condition. The suggested LCCA model focused on Korean national highway, and tried to adopt a national guideline recommended by Korean government for securing credibility of estimation results. In the development processes, some of the suggestions that do not fit well in the situations of pavement management field were added, altered, or partially modified. These attempts to develop customized asset management system would be an important step to break away from passive attitudes relying on ready-made software, but also to improve awareness about the social benefits from the better maintenance strategy.

• Journal of Hydrogen and New Energy
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• v.33 no.2
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• pp.148-157
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• 2022

Research on hydrogen storage is active to properly deal with hydrogen, which is considered a next-generation energy medium. In particular, research on metal hydride with excellent safety and energy efficiency has attracted attention, and among them, magnesium-based hydrogen storage alloys have been studied for a long time due to their high storage density, low cost, and abundance. However, Mg-based alloys require high temperature conditions due to strong binding enthalpy, and have many difficulties due to slow hydrogenation kinetics and reduction in hydrogen storage capacity due to oxidation, and various strategies have been proposed for this. This research manufactured Mg₂Ni to improve hydrogenation kinetics and synthesize about 5, 10, 20 wt% of CaF₂ as a catalyst for controlling oxidation. Mg₂NiHx-CaF₂ produced by hydrogen induced mechanical alloying analyzed hydrogenation kinetics through an automatic PCT measurement system under conditions of 423 K, 523 K, and 623 K. In addition, material life cycle assessment was conducted through Gabi software and CML 2001 and Eco-Indicator 99' methodology, and the environmental impact characteristics of the manufacturing process of the composites were analyzed. In conclusion, it was found that the effects of resource depletion (ARD) and fossil fuels had a higher burden than other impact categories.

• International Journal of Aeronautical and Space Sciences
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• v.16 no.3
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• pp.451-462
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• 2015

Safety is the first priority in civil aviation, and so the International Civil Aviation Organization (ICAO) has introduced and mandated the use of Safety Management Systems (SMS) by airlines, airports, air traffic services, aircraft maintenance organizations, and training organizations. The aircraft manufacturing industry is the last for which ICAO has mandated the implementation of SMS. Since SMS is a somewhat newer approach for most manufacturers in the aviation industry, they hardly believe in the value of implementing SMS. The management of safety risk characteristics that occur during early aircraft development stages and the systematic linkage that the safety risk has to do with an aircraft in service could have a significant influence on the safe operation and life cycle of the aircraft. This paper conducts a case analysis of the McDonnell Douglas MD-11 accident/incident to identify the root causes and safety risk levels, and also verified why aircraft manufacturing industry should begin to adopt SMS in order to prevent aircraft accident.

• Proceedings of the Korean Society for Quality Management Conference
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• 2004.04a
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• pp.114-119
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• 2004

Software verification and validation(V&V) is a means to develop high-quality software and assure safety and reliability for software. Also, we can achieve the desired software quality through systematic V&V activities. The software to be applied safety critical system like nuclear power plants is required to setup the V&V methodology that comply with licensing requirements for nuclear power plants and should be performed V&V activities according to it. In this paper, we classified safety-critical, safety-related and non-safety for software according to safety function to be peformed and define V&V activities to be applied software grade. Also, we defined V&V activities, procedures and documentation for each phase of software development life cycle and showed techniques and management to perform V&V. Finally, we propose the V&V framework to be applied software development of SMART(System-integrated Modular Advanced ReacTor) MMIS (Man-Machine Interface System) and to comply with domestic licensing requirements.

• International Journal of Internet, Broadcasting and Communication
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• v.13 no.3
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• pp.169-177
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• 2021

Recently, the use of electric and electronic control systems is increasing in the automobile industry. This increase in the electric and electronic control system greatly increases the complexity of designing a vehicle, which leads to an increase in the malfunction of the system, and a safety problem due to the malfunction is becoming an issue. Based on IEC 61508 relating to the functional safety of electrical/electronic/programmable electronics, the ISO 26262 standard specific to the automotive sector was first established in 2011, and a revision was published in 2018. Malfunctions due to system failure are covered by ISO 26262, but ISO/PAS 21448 is proposed to deal with unintended malfunctions caused by changes in the surrounding environment. ISO 26262 sets out safety-related requirements for the entire life cycle. Functional safety analysis includes FTA (Fault Tree Analysis), FMEA (Failure Mode and Effect Analysis), and HAZOP (Hazard and Operability). These analysis have limitations in dealing with failures or errors caused by complex interrelationships because it is assumed that a failure or error affecting the risk occurs by a specific component. In order to overcome this limitation, it is necessary to apply the STPA (System Theoretic Process Analysis) technique.

• Proceedings of the Safety Management and Science Conference
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• 2011.04a
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• pp.419-432
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• 2011

제품의 신뢰성에 대한 소비자의 인식이 높아짐에 따라 기업에서는 높은 품질과 신뢰성 있는 제품을 만들기 위해 많은 노력을 하고 있다. 신뢰성은 기기, 부품, 재료 등 시스템이 규정된 조건하에서, 의도하는 기간 동안 규정된 기능을 고장 없이 수행할 수 있는 성질로 규정된다. 높은 신뢰성의 확보를 위한 제품의 신뢰성 시험은 많은 시간과 비용이 소모되기 때문에 현대의 빠른 시장 흐름에 따라가지 못한다. 특히, 최근 기술발전 속도가 빨라지고 제품 수명주기(Life Cycle)와 개발 기간이 짧아지고 있는 추세에 있으므로 이에 대응할 수 있는 신속한 시험방법의 실시가 반드시 필요한 시점이다. 위와 같은 신뢰성을 갖는 제품의 시험의 한계를 극복하고 시험시간을 단축하기 위한 여러 가지 방법이 연구되어 왔고, 그 중 가속 시험(Accelerated Test)에 대한 필요성과 요구가 계속 증가하고 있는 추세다. 본 연구에서는 단순부품과 재료의 신뢰도 정보를 신속하게 얻는데 매우 유용한 신뢰성 시험방법 중에 하나인 가속시험의 연구동향과 적용 현황을 분석하고 이의 효과적인 적용과 활용방안을 모색 하고자 한다.

• Proceedings of the Korea Multimedia Society Conference
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• 1998.04a
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• pp.432-437
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• 1998

컴퓨터 시스템들이 인간 생활의 많은 부분에서 사용되어지면서 하드웨어 또는 소프트웨어 시스템의 안전성 문제에 대한 관심이 커지고 있다. 소프트웨어 시스템에 있어서 각각의 소프트웨어 개발 단계가 가지는 특성이 다르므로 안전성 활동들도 그 활동 관점이나 방법이 달라져야 할 것으로 판단된다. 소프트웨어의 안전성 평가의 방법론, 안전성을 분석하기 위한 결함분석 기법들에 대한 고찰을 본 연구의 기반으로 하여 소프트웨어 라이프사이클 동안에 안전성 확보를 위한 최선의 활동의 방안들에 대하여 연구하였다.

• 제어로봇시스템학회:학술대회논문집
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• 1987.10b
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• pp.307-311
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• 1987

This paper presents a ship navigation system and automated equipments on ship board, whose technology has been quite rapidly developing in recent years. The ship owners and builders are much interested in ship automation systems, due to their comfort, safety and lower life cycle cost in ship operation. Here the basic technology and structure of the system are described, also taken into account is the future trend on the development of the system.