• Journal of the Korean Society of Systems Engineering
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• v.20 no.spc1
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• pp.108-118
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• 2024

As shared electric kick scooters spread to cities worldwide as a result of the proliferation of personal mobility, they have emerged as a significant social issue, impacting pedestrian and user safety, as well as urban aesthetics. In this study, we propose solutions to the unique problems associated with shared electric kick scooters, such as illegal parking, charging, and redistribution. Furthermore, we present research on supplementary services utilizing electric kick scooters in urban areas to enhance citizen safety and user satisfaction through the development of an autonomous electric kick scooter system structure and operational strategies. We suggest a low-cost autonomous electric kick scooter structure and propose AI processing, sensor fusion, and system operation methods to add autonomous capabilities to affordable electric kick scooters. Additionally, we propose operational systems and related technologies for offering various supplementary services.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.32 no.3
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• pp.137-146
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• 2024

Aircraft are affected by various weather elements and phenomena as they operate vertically from the ground up to the tropopause and horizontally across temperate, tropical, and cold regions within a few hours. Meteorological information, which involves observing and forecasting these weather elements and phenomena, is crucial because it influences not only the safety of the aircraft and occurrences of cancellations, diversions, or delays but also the changes in flight time and fuel consumption. Since the routes of national carriers in Korea mainly cover regions with severe weather and significant weather changes, the role of systems and organizations for the collection, analysis, and application of meteorological information is important. This study investigated the operational case and effects of a meteorological organization at airline 'A'. It was confirmed that, following the establishment of this dedicated organization, more systematic application of meteorological information has shown operational effects such as enhancing flight safety, minimizing passenger inconvenience, and contributing to corporate management.

• Safety and Health at Work
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• v.12 no.1
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• pp.133-135
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• 2021

The COVID-19 pandemic has resulted in movement restrictions being instituted globally and the cessation of work at many workplaces. However, during this period, essential services such as healthcare, law enforcement, and critical production and supply chain operations have been required to continue to function. In Singapore, measures were put in place to protect the workers from infection at the workplace, as well as to preserve the operational capability of the essential service in a COVID-19 pandemic environment. This paper critically analyses the measures that were implemented and discusses the extension to broader general industry.

• Proceedings of the Korean Nuclear Society Conference
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• 2001.05a
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• pp.531.1-531
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• 2001

• Proceedings of the Korea Society for Energy Engineering kosee Conference
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• 2000.04a
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• pp.115-123
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• 2000

• Proceedings of the Korean Nuclear Society Conference
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• 2005.05a
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• pp.1325-1326
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• 2005

• Journal of the Korean Society of Marine Environment & Safety
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• v.9 no.1
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• pp.65-72
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• 2003

The prevention of marine accidents has been a major topic in marine society and various policies and countermeasures have been developed, applied to the industries. In order to improve the navigational safety level in the coastal waterways, the navigational safety level must be evaluated from the mariner's perception of safety. So far as human beings are concerned, there are many types of fuzziness in the evaluation of navigational safety level. In order to reflect these fuzziness on this evaluation, this paper introduces the fuzzy integral suggested by Choquet to represent the fuzziness in the evaluation process. This paper aims to develop the method for this evaluation from the viewpoint of mariner's operational stress using the fuzzy measure and Choquet integral. In this paper, Korean coastal area is divided into 8 sectors and evaluated the priority for the needs of coastal VTS and navigational aids. The results are found in the order named Mokpo, Yosu, Pohang, Inchon, Busan, Geoje, Gunsan, Donghae coastal area.

• Journal of the Korean Society of Safety
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• v.39 no.3
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• pp.1-6
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• 2024

Polyester round slings are widely utilized in various work environments due to their lightweight, flexible nature and smooth surface that minimizes the risk of cargo abrasion or damage. However, specific guidelines intended to protect round slings from the damage caused by the sharp edges of cargo, thus preventing accidents in case the cargo falls, are lacking in South Korea. In this study, a comparative analysis was conducted on the regulations and guidelines related to round slings in South Korea and the United States. Further, experiments were carried out to determine the relationship between round slings and lifting accessories. The research identified specific shortcomings in the user manuals provided by round-sling manufacturers. Accordingly, certain measures were proposed for enhancing the operational safety of round slings: 1) establish criteria for edge protection of polyester round slings and 2) recommend standardization of the information provided by manufacturers. As developing new standards is a time-consuming task, this study proposes a method for enhancing the operational safety of round slings in the short term by introducing established safety standards from the United States-where safety has been proven over a considerable period of time-into the domestic context. In addition, it is recommended that edge criteria be permanently printed on the labels of round slings.

• Journal of Korean Society of Transportation
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• v.24 no.5 s.91
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• pp.109-121
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• 2006

The road should be designed in the consistent alignment which the driver can drive safely. Also, proper highway environments in order to maintain optimal operational speeds on highway sections should be provided In design stage, for highway environments, it is essential for an operational speed estimation model to different highway environments. If a method which could evaluate the status of the road safety is developed through this operational speed estimation model, it is possible to provide safe and more comfortable highways to road users. In the study factors to effect on operational speeds are classified into three groups horizontal & vertical alignments and traffic operation characteristic factors. Factors are chosen to effect on operational speeds by using collation analysis as classifications of tangent sections, horizontal curve sections and vertical curve sections. In order to develop operational speed estimation models in express highways, multi-regression analysis has been used in this study using the selected factors. This study has meaning that the developed estimation models for operational speeds and evaluation of degree of safety to horizontal and vortical alignments simultaneous. In order to represent whole area of the country with the developed models, the models should be re-analyzed with vast data related with road alignment factors in the near future.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.4
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• pp.479-488
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• 2019

The flight test operational procedure artifact includes mission planning, execution methods, and safety measures for each step of test progress. As the development of guided missiles has become more advanced and strategic, flight test has become increasingly complex and broadened. Therefore, increased reliability of the flight test operation procedures was required to ensure test safety. Particularly, the design of the flight test operational procedures required verification through M&S to predict and prepare for the uncertainty in a new test. The relevant studies have published the optimal framework development for flight tests and the model-based improvements of flight test processes, but they lacked the specificity to be applied directly to the flight test operational procedures. In addition, the flight test operational procedures, which consist of document bases, have caused problems such as limitations of analysis capabilities, insensitive expressions, and lack of scalability for the behavior and performance analysis of test resources. To improve these problems, this paper proposes how to design operational procedure of guided missile flight test system by applying MBSE(Model-based Systems Engineering). This research has improved reliability by increasing the ability to analyze the behavior and performance of test resources, and increased efficiency with the scalability applicable to multiple flight tests. That can be also used continuously for the guided missile flight tests that will be developed in the future.