• Journal of the Korean Society of Marine Environment & Safety
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• v.18 no.1
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• pp.49-54
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• 2012

The purpose of this study is to define emergency response procedures by BDMS [Building Disaster Management System] when earthquake occurs on long-span bridge structures. The study is about developing a computer-based algorithm for various earthquake intensities that works with the System. Presently, long-span bridge disaster prevention relies on closed-system centered on human intervention alone. However, this study combines IT technology and internet-based open system creating a more practical system. Additionally, assigned duties and tasks are clearly defined to all personnel involved in various disaster situations using the Active Action Diagram(AAD) techniques. Also, the design of 3-dimensional view assists to determine the appropriate initial response in times of earthquake and other disasters. The combination of the existing manual emergency response procedures and the scenario-based (IT) response system being developed will create an efficiency and fast response actions in times of emergencies.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2021.11a
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• pp.224-225
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• 2021

해양사고의 주요 원인으로 언급되고 있는 피로요인은 장시간 소요되는 선박의 운항과정에서 발생할 수 있는 사고발생의 주된 요인이다. 이러한 피로의 유발 요인 중 하나인 음주운항으로, 이로 인한 해양사고는 대형 인명피해 뿐만 아니라 해양환경오염이라는 국가적 대재난으로 이어질 수 있다. 다행히 「해사안전법」 시행령 개정에 따라 주취운항 단속 기준 (혈중알콜농도 기준)이 기존 0.08%에서 2011년 0.05%, 2014년 0.03%로 강화됨에 따라 주취 운항의 위험성에 대한 인식은 개선되고 있으나, 최근 5년 동안 선박 음주 운항 단속 건수는 총 556건으로 나타났으며, 음주운항으로 인한 충돌, 좌초 등의 사고가 지속적으로 발생하고 있다. 본 발표에서는 음주운항이 선박운항에 미치는 영향을 알아보기 위해 선박운항 시뮬레이터 데이터 분석을 통한 음주운항 패턴 분석 결과를 소개하고자 한다.

• Korean Journal of Remote Sensing
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• v.38 no.6_2
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• pp.1653-1661
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• 2022

In this study, the classification of cold water and normal water based on Geo-Kompsat 2A images was performed. Daily mean surface temperature products provided by the National Meteorological Satellite Center (NMSC) were used, and convolution neural network (CNN) deep learning technique was applied as a classification algorithm. From 2019 to 2022, the cold water occurrence data provided by the National Institute of Fisheries Science (NIFS) were used as the cold water class. As a result of learning, the probability of detection was 82.5% and the false alarm ratio was 54.4%. Through misclassification analysis, it was confirmed that cloud area should be considered and accurate learning data should be considered in the future.

• Journal of Navigation and Port Research
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• v.33 no.10
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• pp.699-702
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• 2009

Currently many vessels determine an overhead obstruction by a rule of thumb based on their draft for maritime navigation. Therefore they doesn't have a good overhead obstruction clearance because vertical position of vessels varies on time by tidal. As a result, it is occurred maritime accidents that the mainmast of vessels is bumped against overhead facilities. And disaster by global warming and rising sea levels have increased casualties. So we feel keenly the necessity of warning system for not an earthquake but disaster wave such a tsunami. This paper analyzes a precise GPS ephemeris for maritime precise positioning to solve these problems. The precise GPS ephemeris provided by International GNSS service gives a difficulty to real-time application because of its sample interval. This paper proposes an effective interpolation method for real-time application, and it analyzes an accuracy of precise GPS ephemeris through an interpolation method.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2023.05a
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• pp.132-133
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• 2023

The safe evacuation of people during disasters is of utmost importance. Various life safety evacuation simulation tools have been developed and implemented, with most relying on algorithms that analyze maps to extract the shortest path and guide agents along predetermined routes. While effective in predicting evacuation routes in stable disaster conditions and short timeframes, this approach falls short in dynamic situations where disaster scenarios constantly change. Existing algorithms struggle to respond to such scenarios, prompting the need for a more adaptive evacuation route algorithm that can respond to changing disasters. Artificial intelligence technology based on reinforcement learning holds the potential to develop such an algorithm. As a fundamental step in algorithm development, this study aims to evaluate whether an evacuation algorithm developed by reinforcement learning satisfies the performance conditions of the evacuation simulation tool required by IMO MSC.1/Circ1533.

• Journal of the Society of Disaster Information
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• v.20 no.1
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• pp.206-212
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• 2024

Purpose: This study conducted research on the sharing of information to enhance the survival rate of emergency patients by swiftly transferring them to appropriate hospitals through sharing the patients' conditions, treatment histories, and transportation information with the Maritime Police Agency and relevant agencies when emergencies occur in the marine environment. Methods: In this study, emergency patient information classified in a smartphone app was received, stored, and transmitted using the LoRa communication method by electronic triage tags, and the transmitted emergency patient information was implemented to be collected in real-time through a hybrid triage system along with LoRa receivers. Results: Through the hybrid triage system, it was possible to receive emergency patient information according to the distance or confirm delayed reception. It was observed that most data were received when the distance was short, while data reception was unsuccessful in relatively longer distances. Conclusion: It was confirmed that in mass disaster environments where internet communication is impossible, rapid and accurate understanding of casualty information at disaster sites and appropriate disaster responses can be achieved using self-networking methods such as LoRa communication. However, limitations inherent in communication methods were also recognized. Further research on various communication methods is required to collect emergency patient information and transfer them to appropriate hospitals in situations where internet communication is unavailable.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2019.11a
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• pp.233-234
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• 2019

인천시는 최근 해양재난 및 선박사고 해결을 위해 연안 중소형 안전운행 시스템 실증사업을 기획·추진하고 있으며 실증사업을 통해 선박충돌경고 등 4가지 서비스를 제공할 예정이다. 사업 관련 정책 결정 및 사업예산 근거 확보 등 사업의 지속가능성을 위해서는 서비스 효과평가를 통해 사업이 사전에 설정한 목표를 충분히 달성했는지 여부를 평가하고 필요시 추가적인 보완조치 등을 수행하여야 한다. 본 연구에서는 효과평가 정의, 과정, 체계 및 모형 등 효과평가 관련 이론적 접근을 수행하였다. 또한 관련 선행연구와 효과평가 사례분석 등을 통해 효과평가 모델(안)을 제시하였다. 향후 연구 관계자 및 서비스 체험자 등의 의견과 서비스로 인해 생성되는 Data 분석 등을 통해 효과평가 기준을 개발하고 사업에 적용할 예정이며 이를 통해 해양사고 예방 등 사업 목표 달성에 기여할 것으로 기대된다.

• Journal of the Korean Society of Marine Environment & Safety
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• v.15 no.3
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• pp.205-212
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• 2009

With an entry into force of OPRC-HNS on June 14th 2007, response system against any large scale accidents related to HNS is required to respond rapidly and effectively in a national scale, US national response system and national contingency plan for any chemicals in operation were analyzed to understand the characteristics of management system and response system for any HNS driven accidents in the Us. Main characteristics of the US system were well described as an unified information window and an integrated incident command system supported by response facilities, manpower and technical support from other response organizations through good cooperation. In general, response activities are conducted by private sectors, however, the government will take over response activities in case large scale accidents occur in the Us. Expected expenses for response activities are covered by a type of Superfund in the Us. Several applicable ways are proposed to enable NGO to participate in and reorganize response system in ROK, and are feasible in collaboration with other response organizations and private sectors in the aspects of equipment, technology and manpower, Based upon the above activities, it is desirable to reorganize domestic rules and/or regulations related to response measures in ROK.

• Journal of Korean Society of Coastal and Ocean Engineers
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• v.34 no.6
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• pp.198-210
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• 2022

The southern strait of Jeju is a divergence point of the Tsushima Warm Current (TWC), and it is the starting point of the thermohaline circulation in the waters of the Korean Peninsula, affecting the size and frequency of marine disasters such as typhoons and tsunamis, and has a very important oceanographic impact, such as becoming a source of harmful organisms and radioactively contaminated water. Therefore, for an immediate response to these maritime disasters, real-time ocean observation is required. However, compared to other straits, in the case of southern Jeju, such wide area marine observations are insufficient. Therefore, in this study, surface current field of the southern strait of Jeju was calculated using High-Frequency radar (HF radar). the large surface current field is calculated, and post-processing and data improvement are carried out through APM (Antenna Pattern Measurement) and FOL (First Order Line), and comparative analysis is conducted using actual data. As a result, the correlation shows improvement of 0.4~0.7 and RMSE of about 1~19 cm/s. These high-frequency radar observation results will help solve domestic issues such as response to typhoons, verification of numerical models, utilization of wide area wave data, and ocean search and rescue in the future through the establishment of an open data network.

• 한국해양학회지
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• v.28 no.4
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• pp.339-346
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• 1993

Due to the natural increase of human population and the concentration of industrial complexes to coastal area, the uses of nearshore area were increased drastically, and the tendency will not stop for a while. Therefore, the loss of human life and property damages of the present days for a disaster of the same magnitude should be heavy as compared to those of the past. For the better utilization of the sea and the prevention of the frequent marine natural and man-made disaster, and for the preparedness for the ocean pollutions, through ocean researches are required. the circulation, tidal currents, storm surges, sea surface wind, waves and sea fogs of the Yellow Sea should be investigated first from the oceanographic point of view, and then the dispersion and diffusion of spilled oil and pollutants, beach erosion, red tide, and longterm sea level oscillations can be studied. International cooperation is crucial for the investigation of the sea because of the temporal and geographic scales of the oceanic phenomina.