• Journal of the Korean Society for Aviation and Aeronautics
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• v.16 no.2
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• pp.43-50
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• 2008

ICAO(International Civil Aviation Organization) Doc 9803의 국제규정에 의거하여 SMS(Safety Management System-안전관리시스템)의 대표적인 비행안전 모니터링 프로그램으로 인정된 신개념의 운항감사제도인 LOSA(Line Operations Safety Audit-항공운항 안전감사)를 항공사에서 실시하여 정상 운항시의 운항승무원을 관찰하여 실제의 안전취약 및 위협요소, Error를 포착하여 텍사스대학 인적요인 연구소에서 작성한 최종보고서의 분석을 통해 제도와 방안을 개선한다. 본 논문에서는 LOSA실행을 통한 승무원들의 위협 및 error의 유형과 발생율, 관리율 및 관리여부를 분석하여 설명하고 항공사내 개선인 SCP(Safety Change Process)를 소개하는데 있다.

• Journal of the Korean Society of Systems Engineering
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• v.1 no.1
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• pp.20-25
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• 2005

This paper presents the general system theory and its applications to the safety analysis method that is a recent trend over the traditional event-driven model. This new model is known as STAMP(Systems Theory Accident Modeling and Process) proposed by Nancy G. Leveson in MIT. The new model has benefits o f systemic approaches concerning the system safety as a whole including the context it is in, its stimulants and outcomes, and its parts as well as the relationships among them in a holistic manner. The method consists of a hierarchical control structure, a process model, and the safety constraints governing the control. This paper demonstrates an example that contrasts the differences between the approaches of STAMP and the traditional safety models.

• Proceedings of the IEEK Conference
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• 2006.06a
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• pp.951-952
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• 2006

Railway signaling systems are so vital to ensure the safe operation of railroad and the assurance and demonstration of the safety is so important. The safety management process shall consist of a number of phases and activities, which are linked to form the safety life-cycle. The basic processes of safety management and safety activity throughout the lifecycle are 'risk analysis' and 'hazard control'. The safety managements and activities for the two kinds of aspects are implemented throughout the whole steps of system lifecycle. The risk analyses and hazard controls like those are needed, these activities have to be carried out through the whole of system lifecycle.

• Journal of the Korea Safety Management & Science
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• v.7 no.4
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• pp.179-191
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• 2005

Recently, Vendor Managed Inventory(VMI) has been commonly recognized as one of the supply chain application that delivers clear value to the sectors of electic & electronic components. VMI is a process in which a supplier generates orders for its distributor based on demand information sent by the distributor. VMI is providing the benefits of smoother demand, lower inventories(work in process, safety stock) and reduced costs. This study focused on improvement of safety level inventory efficiency by VMI. The results indicated that VMI allowed the company to serve its customers more surely and efficiently.

• Journal of the Korean Society of Safety
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• v.26 no.5
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• pp.73-80
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• 2011

There are insufficient models that find problems and solutions for accident prevention through risk assessment and suggest safe work process and work instruction from foundation works to finish work for accident decrease. This paper presents a quantitative risk assessment model by analysis of risk factors in each process such as foundation, erection, pier, pier upper and etc based on accident examples and investigation on actual condition in bridges construction work. In addition, the safety management system was developed to perform risk assessment of construction and use it for effective safety training for labor.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.18 no.9
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• pp.7-16
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• 2019

According to KGS FS551, the safety of an exposure pipe system should be calculated quantitatively by calculating the stress of exposed piping for thermal expansion. However, many pipe system designs and installation sites are not equipped for this. Therefore, KGS FS551 suggested the use of safe gas by presenting the recommended pipe shape. The shapes of various pipe systems have been derived. However, the recommended shape could not be an absolute evaluation standard. Furthermore, the ongoing debate over standards between a plumbing installer and an inspector is an obstacle to the efficient and safe use of gas. Therefore, the correct pipe system evaluation method is examined in this study, and the safety of the existing exposed pipe system is verified.

• Journal of the Korea Safety Management & Science
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• v.21 no.3
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• pp.11-16
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• 2019

The latest issue is the smart factory. In order to implement this smart factory, the most fundamental element is to establish product specifications for factors affecting the product, obtain useful data to analyzed and predicted, and maintain safety. But most manufacturers have many errors. Therefore, the purpose of this study is to verify factors of product through statistical techniques and to study the process control and safety.

• Journal of the Korean Society of Systems Engineering
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• v.17 no.2
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• pp.82-90
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• 2021

The spent fuel pool (SFP) of a nuclear power plant functions to store the spent fuel. The spent fuel pool is designed to properly remove the decay heat generated from the spent fuel. If the cooling function is lost and proper operator action is not taken, the spent fuel in the storage pool can be damaged. Probabilistic safety assessment (PSA) is a safety evaluation method that can evaluate the risk of a large and complex system. So far, the probabilistic safety assessment of nuclear power plants has been mainly performed on the reactor. This study defined the requirements and the functional architecture for the probabilistic safety assessment of the spent fuel pool (SFP-PSA) by applying the systems engineering process. And, a systematic and efficient methodology was defined according to the architecture.

• Journal of the Korean Society of Safety
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• v.33 no.2
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• pp.112-123
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• 2018

In this paper, we focused on the safety of workers in a remanufacturing process where a risk analysis is not carried out and suggested a criteria for evaluating injury risk. We analyzed a disassembly and a reassembly, which are important for the remanufacturing process. The disassembly includes the disassembly of product and the disassembly process of part and the reassembly includes only reassembly of part. First of all, we analyzed the remanufacturing process and a type of injury. Then, we reviewed the standards and determined the criteria for a severity and an occurrence. We set a bigger weight for the severity to allow the greater impact. And the injury risk score was defined as a sum of the weighted severity and the weighted occurrence. We conducted a qualitative analysis of the experience of field workers based on the criteria we set up. Questionnaires for the evaluation were formulated through interviews with experts.

• Journal of the Korean Society of Safety
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• v.29 no.5
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• pp.116-122
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• 2014

Assessment of setting process of concrete is important as it provides useful information to schedule concreting work in construction site. Electrical impedance measurement method, which utilizes the change of electrical resistance of concrete, has been applied to assess setting process of cement-based materials. However, the applicability of the method has been demonstrated only for cement paste and mortar. The main purpose of this research is to develop the electrical impedance based setting process assessment for concrete. To this end, electrical impedance response model for concrete should be developed in advance since it is essential to estimate the electrical resistance of concrete from measured impedance response. The electrical resistance of concrete is a key parameter for the setting process assessment. In this study electrical impedance responses of the concrete in setting process are measured and analyzed. Thereby, an electrical impedance response model of the liquid state concrete is developed and schematically validated.