• The Journal of The Korea Institute of Intelligent Transport Systems
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• 제10권1호
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• pp.16-26
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• 2011

Variable speed limit(VSL) is one of the highway ITS techniques designed to prevent accidents and traffic slow down by reducing congestion or speed variation between vehicles and lanes prior to arrive at the accident location by limiting speed. In Korea, while people have recognized the need for variable speed limit beginning with Seoul's urban expressway and installed facilities in order to provide guide for speed limit per lane and lane use, there has not been enough development of algorithm for internal administration as well as research on the basic principles behind administering variable speed limit. This study is for modeling and evaluating the VSL strategies based on the traffic flow theory. Supply-Demand method of the Cell Transmission Model is applied to demonstrate the traffic features and shockwaves to upstream of the bottleneck with/without VSL. We verified the explanation of Cell Transmission Model for the numerical example. and as the result, it is found that VSL strategies can reduce the total travel time in the congested section and variation of the speed. It means VSL is useful to improve the traffic condition and the safety on highway

• Journal of the Society of Disaster Information
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• 제16권1호
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• pp.87-95
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• 2020

Purpose: In this paper, we propose an algorithm for detecting respiratory rate and heart beat of a driver of car by exploiting Doppler radar, and verifying the feasibility of the study through experiments. Method: In this paper, we propose a weighted peak detection technique using peak frequency values. The tests are performed in stop-state and driving-state, and the experiment result is analyzed by two proposed algorithms. Result: The results showed more than 95% and 96% accuracy of respiratory and heart rate, respectively. It also showed more than 72% and 84% accuracy of those even for driving experiments. Conclusion: The proposed detection scheme for vital signs can be used for the safety of the driver as well as for prevention of a large size of car accidents.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 한국항해항만학회 2019년도 추계학술대회
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• pp.39-40
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• 2019

우리나라는 국제해사기구(IMO)에 "여객선 탈출지도체계의 기술개발에 관한 정보"라는 안건(IMO SSE4/INF2)을 2017년에 제출한 바 있다. 이 의제에 소개된 지능형 선박 및 인명대피 안내시스템(SEGA)은 한국해양과학기술원의 주관으로 한국해양수산부의 지원을 받아 2016년부터 2020년 3월까지 약 4년간의 프로젝트로 개발 중에 있다. SEGA는 데이터 수집과 분석, 정보 표시의 프로세스를 자동화하여 우리나라 연안에서 항해 중인 선박에 비상상황이 발생할 경우 항해자의 의사결정을 지원하는 시스템이다. SEGA 시스템을 지원하기 위해 구축된 SEGA 서버와 데이터베이스는 해양기상정보, 수심정보, 해상교통정보를 처리 한다. 또한 비상상황 시 2차 사고를 방지하기 위해 선박이 대피 할 수 있는 장소에 대한 정보를 사용자가 확인할 수 있도록 알고리즘이 설계되어 있다. 인명안전을 위해 SEGA는 비상상황 시 선박내부 구조정보와 화재 등 변수사항들을 고려하여 승객들에게 빠른 탈출을 위한 최적대피경로를 제공하며, 원격탐사기술을 이용하여 선박주변의 익수자를 탐지하도록 개발 중에 있다. 보다 상세한 내용은 항해항만학회 VTS 특별세션에서 발표할 예정이다.

• Journal of the Korean Society of Marine Environment & Safety
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• 제24권7호
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• pp.858-862
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• 2018

The purpose of this study is to improve the current vessel departure control regulations to prevent traffic congestion after the lifting of vessel departure controls due to restricted visibility. AIS data was collected to analyze the traffic volume of normal traffic flow and after departure control. A statistical test was conducted to confirm the difference in traffic volume at peak hours according to whether or not departure control was used. The results of the t-test showed that there was a significant difference in traffic volume among groups of less than 10,000 tons in gross tonnage. However, the Mann-Whitney test showed no difference in traffic volume regardless of vessel control. Small and medium-sized vessels of less than 10,000 tons after departure control increased in traffic volume by 142% over normal traffic, and it was concluded that traffic congestion resulted as these small and medium-sized vessels were departing at the same time as large vessels of more than 10,000 tons. In order to prevent vessel collision accidents due to traffic congestion, it is suggested that the navigability of vessels less than 160 m or less than 10,000 tons should be improved.

• Journal of Advanced Marine Engineering and Technology
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• 제39권3호
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• pp.318-325
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• 2015

Korea has very strong shipbuilding industry in the world, so many new ships are constructed in Korean shipyards. These built vessels are carrying out sea trial at sea before delivering to shipowner, and sea trial ships cause navigation risk to other passing vessels to accomplish sea trial tests as quick turning, zigzag maneuvering and crash astern etc. in traffic congestion conditions. It occurred more than 1 collision accident related sea trial for recent 5 years. It has been increased about 30% of risk because of navigation of sea trial vessel by marine traffic flow simulation. This paper analyzed marine traffic density surveyed by AIS data for 7 days, and investigated position of marine accidents for 5 years in Korean coastal waterway, it established the sea trial prohibition areas as 10/100 level of total marine traffic volume, which is considered no danger for ship operator. This analyzed maritime safety law for setting of the prohibition waters to propose the basic legal system. It makes contribution to marine pollution prevention by setting of the sea trial prohibition water to improve the ship's navigation safety.

• Journal of Advanced Navigation Technology
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• 제18권5호
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• pp.518-523
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• 2014

The development of Societal and Scientific technologies have increased risk of dysfunction caused by new technologies such as nuclear power, information technology. Also, urbanization and population density is increasing risk to high-rise building fires, traffic accidents, crime and etc. Implementation of wireless communication network on the societal security is very necessary for prevention, preparation and response against these risks. It always consists maintenance, management and the network must be maintained in an emergency. In this paper, we studied the societal security wireless communication network for prevention, preparation and response against complex disasters, and analyzed requirements(essential function, add-ons) for implementation network in the societal security wireless network.

• Journal of Society of Preventive Korean Medicine
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• 제25권3호
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• pp.15-24
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• 2021

Objectives : This study sought to identify the Korean medicine treatment satisfaction of 3,000 patients who are 19 or older with experiences of being treated with Korean medicine at Korean medicine clinics or Korean medicine hospitals after experiencing traffic accidents. Methods : Frequency analysis was carried out to identify the effectiveness and satisfaction of Korean medicine services, and independent sample t-test was carried out to compare the satisfaction of users with different characteristics. Lastly, cross analysis(chi-square) was carried out to examine the relation between satisfaction and willingness to recommend. Results : Firstly, 91.3% of the patients were satisfied with the medical services provided at Korean medicine clinics, with the most satisfactory Korean medicine treatments in the order of acupuncture, moxibustion, cupping, Korean physical therapy, herbal acupuncture, Chuna manual therapy, herbal medicine, and others. Secondly, 71.3% of the patients answered that outpatient treatment was appropriate while 65.3% of the patients answered that hospitalized treatment was appropriate regarding duration of treatment at Korean medicine clinics, mostly being satisfied with the treatment duration at Korean medicine clinics and Korean medicine hospitals. Thirdly, in a survey on effectiveness of Korean medicine treatment compared to occidental medicine treatment, 85.9% of the patients answered: "the effectiveness of Korean medicine treatment is higher compared to occidental medicine or similar". Conclusion : From the results of this study, it was identified that satisfaction of Korean medicine treatment is high in motor insurance, and that higher satisfaction led to higher willingness to recommend Korean medicine treatment to others. Based on such results, the expansion of the role of Korean medicine could be understood.

• Journal of Society of Preventive Korean Medicine
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• 제26권3호
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• pp.49-58
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• 2022

Objectives : The purpose of this study is to analyze the factors affecting the intention of traffic accident patients, who had visited Korean medicine clinics for the purpose of treating traffic accidents, on revisiting and recommending those clinics to others. Methods : This study conducted the frequency analysis, Rao-scott chi-square test, and logistic regression analysis on 389 people, who answered that they had once visited Korean medicine clinics for treatment in traffic accidents, using data from the 2020 Korean Medicine Utilization and Herbal Medicine Consumption Survey. Results : As a result of the analyses, it was revealed that the significant influencing factors entailed marital status, job status, the attitude of medical staff, and access to the Korean medicine clinics, while only access to the Korean medicine clinics was a significant influencing factor for the intention to recommend to others. Especially, the intention of to revisit and to recommend in case of satisfying access to the Korean medicine clinics were 8.476 times and 6.784 times higher than when it is not the case. Conclusions : The results of this study reflect the characteristics of automobile insurance, and indicate that both further study and policy establishment on the operation of the automobile insurance system are required to ensure sufficient treatment for traffic accident patients.

• Journal of the Korean Society of Hazard Mitigation
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• 제5권3호
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• pp.83-88
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• 2005

It is necessary to hold the school safety manual because recently, the safety-related accidents occur frequently in schools. Accidents can occur inside of schools as well as out of schools, and they can be classified with human accidents, traffic accidents, fire accidents, and explosion accidents. Safety-related accidents occurring in the school are dangerous because nobody can predict them. Illegally infringing violence, targeting unspecified and a lot of people, informs the parents and persons concerned to education of danger. School safety manual, never precedented before, describes epoch-making educational methods for students' safety. It describes safety security such as refuging ways at an emergency, the way to recognize danger for elevated safety based on prevention education, the use and practice of checklist for related facilities, and the implements and facilities for school personnels and students. So, the school safety manual is an important guidance for safety education at the level of prevention from various accidents which occur inside the school as well as out of the school. It presents a variety of prompt response after an accident. At the same time, it checks facilities and dangerous factors in schools and facilities for safety, and analyzes special factors based on them. So it will present the status of safety management of existing facilities and implements, the installment of new facilities and implements, and the way to secure safety for use.

• ICROS
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• 제2권2호
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• pp.35-40
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• 1996

이 글에서는 자동차 Body 전자제어 시스템 개요 및 개발동향에 대하여 살펴보았다. 향후 Body 전자제어 분야에서는 사고예방을 위한 첨단 안전 시스템 개발, 정보 및 통신시스템을 이용한 Navigation 시스템 개발, 차량 LAN구축, ECU(Electronic Control Unit) 통합기술 개발을 위한 노력이 가속화될 것으로 전망된다. 이러한 시스템의 개발을 위해서는 자동차 부문과 관련 전자 부문의 긴밀한 공동 연구체제가 확립되어야 함과 동시에 통신기능을 갖춘 지능형 도로 시스템 구축, 교통전용 방송국 운용 등 정부차원에서의 Infra-structure 건설이 시급한 상황이다. 이를 위하여 정부 주관하에 자동차 각사, 유관업체 및 연구기관의 참여로 전국 도로에 대한 Digital Map 개발을 위한 G-7 Project 등의 다양한 계획이 진행중이거나 추진 예정으로 있는 바 성공적으로 수행될 경우 2005년을 전후로 하여 안전성 및 편의성 측면에서 완벽한 시스템을 구축할 수 있을 것으로 사료된다.