• Journal of the Society of Disaster Information
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• v.19 no.4
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• pp.882-896
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• 2023

Pupose: The purpose is to prepare safety management and seismic reinforcement measures that can effectively improve the potential risks of earthquake-resistant design and the deficiencies of safety guidance and inspection of factory facilities in national industrial complexes. Method: In this study, problems and improvement measures were derived through investigation and analysis of overall earthquake disaster safety management, such as safety management status and management system in preparation for earthquake disasters in national industrial complexes. was implemented to suggest improvement plans based on facility types and structural characteristics. Result: In conclusion, the problems of safety management and seismic reinforcement in preparation for earthquake disasters in national industrial complexes were summarized and classified into four types (seismic performance evaluation and related system supplementation, authority of tenant companies and local governments, seismic reinforcement and safety management support measures, organizational structure capacity building) to derive improvement measures. Conclusion: Based on this, seismic reinforcement measures that companies in national industrial complexes should implement in preparation for earthquake disasters were prepared, and detailed plans for each measure were presented.

• Journal of the Korean Institute of Gas
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• v.28 no.1
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• pp.1-10
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• 2024

In this study, we constructed a process simulation model for an agricultural by-products based Solid Oxide Fuel Cell (SOFC) combined heat and power generation system as part of the introduction of technology for energy self-sufficiency in the agricultural sector. The aim was to reduce the burden of increasing fuel and electricity consumption due to rapid fluctuations in international oil prices and the expansion of smart farming in domestic farms, while contributing to the national greenhouse gas reduction goals. Based on the experimental results of 0.3 ton/day torrefied agricultural by-product gasification experiment, a model for an agricultural by-product-based SOFC cogeneration system was constructed, and optimization of the heat exchange network was conducted for SOFC capacities ranging from 4 to 20 kW. The results indicated that an 8 kW agricultural by-product-based SOFC cogeneration system was optimal under the current system conditions. It is anticipated that these research findings can serve as foundational data for future commercial facility design.

• Journal of the Korean Society of Safety
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• v.39 no.2
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• pp.75-86
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• 2024

Hydrogen has been selected as one of the key technologies for reducing CO₂ emissions to achieve carbon neutrality by 2050. However, hydrogen safety issues should be fully guaranteed before the commercial and widespread utilization of hydrogen. Here, a bow-tie risk assessment is conducted for the hydrogen fuel supply system in a gas turbine power plant, which can be a mass consumption application of hydrogen. The bow-tie program is utilized for a qualitative risk assessment, allowing the analysis of the causes and consequences according to the stages of accidents. This study proposed an advanced bow-tie method, which includes the barrier criticality matrix and visualized maps of quantitative risk reduction. It is based on evaluating the importance of numerous barriers for the extent of their impact. In addition, it emphasizes the prioritization and concentrated management of high-importance barriers. The radar chart of a bow tie allows the visual comparison of risk levels before/after the application of barriers (safety measures). The risk reduction methods are semi-quantitatively analyzed utilizing the criticality matrix and radar chart, and risk factors from multiple aspects are derived. For establishing a secure hydrogen fuel storage system, the improvements suggested by the bow-tie risk assessment results, such as 'Ergonomic equipment design to prevent human error' and 'Emergency shutdown system,' will enhance the safety level. It attempts to contribute to the development and enhancement of an efficient safety management system by suggesting a method of calculating the importance of barriers based on the bow-tie risk assessment.

• Journal of Navigation and Port Research
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• v.48 no.1
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• pp.1-6
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• 2024

Aid-to-Navigation facility is important for maritime traffic safety. In Korea, for safe maritime traffic, the Ministry of Oceans and Fisheries is using an Aid-to-Navigation management system. The current Aid-to-Navigation management system displays information based on text, making it difficult to determine the impact if Aid-to-Navigation fails or an accident occurs. A simulator can be used to verify the placement of Aid-to-Navigation. However, real-time information is not applied and maintenance of the simulator is expensive. Additionally, the Aid-to-Navigation simulator cannot simulate effects of port backlighting. To improve these issues, we proposed an Aid-to-Navigation management platform based on digital twin technology. This system can predict failures by analyzing real-time sensor data collected from navigation signs. We plan to develop a function that can simulate Aid-to-Navigation placement. Aid-to-Navigation is expected to be managed efficiently by applying digital twin technology.

• Journal of Community Safety and Security by Environmental Design
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• v.9 no.2
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• pp.97-121
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• 2018

This study is to suggest planning of children's parks for the safe environment and the priority of planning by comparing the differences of perception among the subjects related to the establishment and use of children's parks in order to create a safe environment. The results of this study are as follows. First, there was the greatest concern about 'traffic safety' in the safety of children's parks. Second, it is necessary to establish safe environment for 'play space' and 'facilities' among the space factors that constitute the children's park. Third, the difference of perceptions between experts and users about planning factors for safe environments of a children's park was most conspicuous concerning the issues related to 'rest space' and 'crime safety facilities'. Fourth, to create safe environments of a children's park, the planning factors belonging to 'crime prevention facility planning factor' and 'toilet planning factor'.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.44 no.3
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• pp.375-383
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• 2024

The size of the construction industry is increasing, and its impact on the entire national industry is also significant. However, construction cost increases, construction period delays, safety accidents, and quality problems occur during the construction process. This paper analyzed the construction cost, construction period, and change order performance for civil infrastructures for which post evaluation was performed. The analysis was conducted by dividing civil engineering facilities by type, construction nature, construction cost, contract nature, and delivery method. Planned and actual construction cost and period were compared during the planning, design, and construction process of civil engineering facilities. There is a possibility of input errors in project performance data, this paper proposes to the post-evaluation center should perform post-evaluation. Also, post-evaluation implementation guidelines for change orders should be revised. Additionally, further analysis of each facility was proposed through continuous data collection.

• Convergence Security Journal
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• v.24 no.3
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• pp.219-229
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• 2024

The application of 4th Industrial Revolution technologies in the defense sector is accelerating, leading to the rapid incorporation of information and communication technologies (ICT) into military systems. The biggest threat to these ICT-based military systems is an electromagnetic pulse (EMP) attack, which can result from nuclear explosions or EMP bombs. North Korea's ongoing nuclear advancements and EMP bomb capabilities pose a critical threat, necessitating South Korea's preparedness for such attacks to ensure the effective operation of its ICT-based military systems. Despite this urgency, the South Korean military currently lacks comprehensive standards for EMP protection, relying only on the design criteria for EMP protection facilities for buildings. This gap highlights the absence of sufficient legal and regulatory measures and the lack of focused research to develop EMP protection performance standards for safeguarding military systems. Therefore, this paper aims to analyze existing EMP protection performance standards and relevant laws and regulations. It proposes improvements and establishes necessary standards to enhance the EMP resilience of military facilities and equipment.

• Journal of Wellbeing Management and Applied Psychology
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• v.7 no.4
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• pp.29-37
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• 2024

Purpose: This study aims to understand the types and amounts of greenhouse gases among substances generated when operating facilities at resource recovery facilities in Seoul and analyze their impact on the environment. Research design, data and methodology: As a research method, you can directly visit four resource recovery facilities in Seoul, investigate greenhouse gases generated when operating the facilities, and then understand the distribution of generation through the greenhouse gas calculation formula. In addition, the impact, distribution, etc. that they have regionally can be confirmed by comparing the emission source and the surrounding site boundary line through the environmental impact survey report Results: When operating resource recovery facilities, you can determine whether there is a possibility that they will actually affect the surrounding areas, especially in areas where humans reside, such as private homes and vulnerable facilities, and if so, the results can be determined. The goal of this study is to understand how much the effects of greenhouse gases contribute to climate change and what the effects are on the human body. Conclusions: he results of this study can identify the causes of negative images of the survival of resource recovery facilities and the expansion and establishment of new resource recovery facilities, and suggest eco-friendly measures such as waste export, recycling, and recycling instead of new construction on the impact on climate change.

• Clinics in Shoulder and Elbow
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• v.27 no.2
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• pp.237-246
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• 2024

Proximal humeral fractures (PHFs) are a common injury among the older population. An ideal therapeutic protocol has yet to be developed, and numerous clinical trials are being conducted to find the best therapeutic approach. The purpose of this study is to evaluate the current body of knowledge available via interventional clinical trials. In December 2022, interventional clinical trials relating to PHFs on Clinicaltrials.gov were screened. Trial characteristics included duration, status, intervention, phase, outcomes, location, and study design. Publications associated with each trial were searched on PubMed/Medline using the ClinicalTrials.gov registry number. The final dataset comprised 64 trials. The most common trial status was completed (36%). The majority did not have a Food and Drug Administration-defined phase (67%), was randomized (81%), involved a single facility (72%), used a parallel assignment intervention model (80%), and used an open-label approach (45%). Eleven trials were associated with a publication, and the publication rate was 17%. Average enrollment was 86 participants, and mean trial duration was 51.4 months. Europe/UK/Russia/Turkey participated in the most trials (70%). Most of the trials were initiated after 2010 (87.5%). Procedure-related interventions (55%) were most common. Disability/function was the most common primary outcome assessed (61%). The low publication rate and the multitude of trials conducted after 2010 highlight the urgency and need for trial results to be published to establish an ideal therapeutic protocol. Since the majority of the trials involved a single institution and an open-label approach, reinforcing blinding and establishing multi-centered trials can improve the validity of the clinical trial results.

• International conference on construction engineering and project management
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• 2024.07a
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• pp.1317-1317
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• 2024

As climate change escalates extreme weather events, the structural durability of plastic greenhouses, constituting 90% of Korea's facility agriculture, emerges as a critical issue. These greenhouses are pivotal for year-round crop cultivation and high-quality agricultural production. In 2021, collapses caused around US$2 million in damages, mainly due to heavy snowfall and strong winds, accounting for 97% of incidents. The Korean Ministry of Agriculture responded by disseminating disaster-resistant standardized designs, yet more robust standards are needed. Current designs rely on elastic analysis, but plastic greenhouses display nonlinear behavior due to factors like residual stress and local buckling. Our study employs a refined plastic hinge method and finite element analysis to analyze structures, considering progressive yielding. We conducted loading tests using scale down models of plastic greenhouses in accordance with similitude laws. Based on these tests, the deformation of models under different load conditions was measured and compared with the deformation of greenhouse using our nonlinear structural analysis. This study will contribute to the development of reliable design criteria for plastic greenhouses in response to climate extremes such as heavy snowfall and typhoons. In addition, by identifying the deformation characteristics of plastic greenhouses due to loads, it can contribute to establishing usability standards for greenhouses, and reinforcement measures for vulnerable areas which are easily deformed under load can be considered.