• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2023.11a
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• pp.188-189
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• 2023

등부표의 위치변화는 외력에 의한 변화가 가장 크다. 등부표는 2년을 주기로 인양점검하고 작업자에의해 고시된 위치에 다시 정치된다. 본 연구는 등부표 인양점검을 기준으로 위치패턴변화를 분석하여 향후 등부표를 효율적으로 관리하는데 있다. 분석결과 등부표의 위치는 인양점검 위치에 따라 위치패턴의 변동이 있었다.

• Journal of Navigation and Port Research
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• v.48 no.3
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• pp.164-170
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• 2024

The light buoy, a floating structure at sea, is prone to drifting due to external factors such as oceanic weather. This makes it imperative to monitor for any loss or displacement of buoys. In order to address this issue, the Ministry of Oceans and Fisheries aims to issue alerts for buoy displacement by analyzing historical buoy position data to detect patterns. However, periodic lifting inspections, which are conducted every two years, disrupt the buoy's location pattern. As a result, new patterns need to be analyzed after each inspection for location monitoring. In this study, buoy position data from various periods were analyzed using convex hull and distance-based clustering algorithms. In addition, the optimal data collection period was identified in order to accurately recognize buoy location patterns. The findings suggest that a nine-week data collection period established stable location patterns, explaining approximately 89.8% of the variance in location data. These results can improve the management of light buoys based on location patterns and aid in the effective monitoring and early detection of buoy displacement.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2011.06a
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• pp.263-265
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• 2011

우리나라 해역에서 선박의 대형화, 고속화와 선박교통량의 증가 및 항만과 해양개발 등으로 해상교통 환경은 급속하게 변화하고 있으며, 항로의 좌 우 측방 한계 표시, 항행위해요소의 표시 등의 용도로 사용되는 부표류는 항만, 연안해역 및 내륙수로에서 통항 선박의 안전을 위하여 그 수요가 점진적으로 늘어나고 있다. 변화하는 해양교통 환경에 능동적으로 대처하고 부표관리 업무의 효율성을 증대하기 위하여 경량화, 내부식성, 저비용 등 장점으로 정온도가 유지되는 항내나 내륙수로 등에서 국제적으로 항로표지용 부표로 이용되고 있는 플라스틱 부표의 국외 개발 동향, 제조 방법 및 시제품의 특성 평가를 통한 기술 향상 방안에 대하여 기술하였다.

• Journal of the Korean Society of Marine Environment & Safety
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• v.29 no.5
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• pp.456-461
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• 2023

The Korea Maritime Environment Corporation is conducting a comprehensive survey of the national marine ecosystem under the commission of the Ministry of Oceans and Fisheries (MOF) to ensure continuous use of the ocean, preserve and manage the marine ecosystem. The survey has set major peaks to investigate changes in the marine ecosystem around the Korean Peninsula. However as the peak has been set around the coast, it is necessary to expand the scope of investigation to encompass offshore areas. Meanwhile, the Aids to Navigation Division of the MOF supports a comprehensive national marine ecosystem survey providing photographs of fouling organisms during the Aids to Navigation lifting inspection, however, the photographs are provided only in consultation with the Korea Maritime Environment Corporation. Therefore, a study was conducted to generate information on fouling organisms using deep learning-based image processing algorithms by the lifting Aids to Navigation and dorsal buoys so that Aids to Navigation could be used as the major component of a comprehensive national marine ecosystem. If the Aids to Navigation are used as the peak of the survey, they could serve as fundamental data to enhance their own value as well as analyze abnormal marine conditions and ecosystem changes in Korea.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.40 no.7
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• pp.679-683
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• 2016

Boilers of large-sized coal-fired power plants are being operated under very poor conditions such as continuous operation or repeating of start-up and shutdown for a stable supply of electricity. Thus periodic inspection and maintenance are required to ensure reliability of operation. The loads of existing scaffolding systems for the maintenance of boilers are concentrated in the lower parts structurally, which may cause a serial collapse of the overall scaffolding system when there are problems in some members. Therefore, in this study, a safe furnace scaffolding system is developed by dispersing the loads in the upper part, as well as minimizing the hazards of serial collapsing. In addition, for cases where the direct installation of furnace scaffolding is challenging owing to the structure of the boiler tube, a lifting system for the installation of furnace scaffolding is developed so that furnace scaffolding can be supported to secure the integrity of the power generating facility.

• Journal of the Korea Institute of Construction Safety
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• v.5 no.1
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• pp.9-16
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• 2023

Gang-foam is used in many construction projects because it is not only precise in terms of vertical, horizontal, and specifications, but also easy to install and dismantle. However, major accidents occur every year due to non-compliance with safety rules and work order, also manuals and checklists currently in use are insufficient. Thirty-seven surveys was conducted by analyzing major accident cases of domestic gang-form construction project and deriving 20 risk factors and 43 check points. Based on the survey, the importance and appropriateness of check points were evaluated. As a result of this study, a checklist was presented, check points were placed in the order of importance based on assembly, installation, dismantling, and lifting of the Gang-form process. The checklist was organized so that workers could comply with safety rules and work order. Through this, it is expected to prevent major accidents and contribute to efficient safety management.