• Korean Journal of Construction Engineering and Management
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• v.22 no.1
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• pp.47-54
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• 2021

According to the Korea Occupational Safety and Health Agency's (KOSHA) report on industrial accident statistics over the past four years, the number of casualties at construction sites from 2017 to June 2020 was about 93,158 and the number of deaths was about 1,977, showing a high trend of safety accidents among the eight major occupational groups, with the construction industry ranking third in total and the death rate being the highest in total. Among them, the number of deaths caused by falls in the entire occupational category is about 1,267, the highest rate of deaths due to contact is about 522, which is a frequent safety accident among the top three accident types. This paper aims to help reduce the overall proportion of construction safety accidents by developing smart safety sensing devices using ultrasonic sensors to prevent two types of safety accidents, which have the highest rate of occurrence among various types of safety accidents occurring at construction sites.

• The Safety technology
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• no.159
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• pp.24-25
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• 2011

고용노동부가 최근 발표한 '2010년 건설재해 발생현황'에 따르면 지난 한 해 건설업종에서 발생한 재해자수는 2009년(20,998명)보다 1,504명이 증가한 22,502명으로 나타났다. 사망자수는 2009년(606명)과 비교해 32영 감소한 574명으로 조사됐다. 종합해보면 작년 한 해 동안 건설현장에서 매일 61명이 다치고, 이틀에 3명씩 사망한 셈이다. 이처럼 사고 발생률이 매우 높은 건설현장의 재해문제는 그동안 꾸준히 화두가 되어왔다 특히 건설현장의 사고 대부분은 대형사고로 직결 된다는데에서 볼 때 건설현장의 사고는 언제나 사회적으로 큰 이슈를 받아왔다. 그렇다면 건설현장에서의 사고를 대비하기 위해서는 어떤 것이 가장 중요할까. 단연 추락사고에 대한 예방이 가장 필요할 것으로 보인다.

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 2002.05a
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• pp.486-490
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• 2002

건설현장에서 중대사고로 가장 큰 비율을 차지하고 있는 추락사고는 크게 줄지 않고 아직도 현장에서 염려해야 하는 사항으로 남아 있다고 볼 수 있다. 산업 발전과 더불어 공사 기술 발전으로 공사진행이 좀더 안전하고 품질확보 가능한 수준으로 추진되고 있음에도 이들 사고가 발생하고 있다는 것은 단순히 눈에 보이는 시설준수 안전교육 만으로 만 해결될 수 있는 것이 아니라는 즉 밝혀지지 않은 작업자의 내면적인 심리와도 상관관계가 있을 수 있다는 것이 본 연구의 출발점이라 하겠다.(중략)

• Journal of Advanced Navigation Technology
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• v.26 no.5
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• pp.281-288
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• 2022

This study quantitatively analyzed the human casualties that can occur when a multicopter-type Urban Air Mobility (UAM) with a weight of about 1 ton and a speed of about 100 km/h falls in an urban area. Based on the population density and building database in Seoul, the population exposed to collisions in the event of a UAM crash was derived. Through the ballistic descent model, the accident impact radius of the UAM fall was calculated. In addition, the change in human casualties on the ground was analyzed when the accident impact radius increased. Finally, the ground risk map was created for Seoul, and it was confirmed that about 1 to 10 people could be injured when a UAM crash.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.26 no.5
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• pp.373-384
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• 2013

This paper is the second paper among two papers which constitute the paper about the rigid body dynamic analysis on the spent nuclear fuel disposal canister under accidental drop and impact to the ground. This paper performed the numerical study on the rigid body dynamic analysis. Through this study the impulsive force which is occurring in the spent nuclear fuel disposal canister under accidental drop and impact to the ground and required for the structural safety design of the canister is computed numerically. The main content of this numerical study is about the technical method how to compute the impulsive forces occurring in the canister under accidental drop and impact to the ground by using the commercial rigid body dynamic analysis computer codes. On the basis of this study the impulsive force which is occurring in the canister in the case of collision with the ground is numerically computed. This numerically computed impulsive force is increasing as the canister weight is increasing, and the canister falls plumb down and collides with the ground in three types according to the analysis results.

• Journal of Aerospace System Engineering
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• v.15 no.1
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• pp.47-55
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• 2021

When an abnormal landing occurs, aircraft structures should be designed to guarantee occupants survivability without preventing egress. To find out fire root causes at crash, lots of fixed aircraft crash tests were conducted. Appropriate crash load factors were established with the comprehension of structural behavior based on dynamic analysis and investigation of human tolerance. Cargo restraint criteria were set up considering passengers safety and operational cost while analyzing past cargo aircraft accident data using a probabilistic approach. Reviewing results of past crash tests, current crash landing load factor was appreciated physically, medically, and economically.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2018.11a
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• pp.125-126
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• 2018

최근 해상에서 외부충격으로 정신을 잃고 바다에 빠져 익사하는 사고가 발생하고 있어 해양안전 및 공익을 위해 해양수산부에서는 선박에서 해상으로 추락 시 해로드 앱과 연계되어 조난자의 위치를 자동으로 발신하여 구조요청을 할 수 있는 장치를 개발하였다.

• Annual Conference of KIPS
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• 2023.11a
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• pp.1076-1077
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• 2023

해상 추락사고에 대응하는 해상 구조 로봇 프로젝트는 항만 근로자의 추락사고 감지와 피해자 구조에 초점을 둔다. 센서와 자율주행 기술을 접목하여 정확하고 효율적인 구조 작업을 가능케 하고, 자체 개발한 워터센서를 활용하여 신속한 구조를 지원한다. YOLO를 이용한 피해자 위치 파악, 블루투스 기반 관리자 어플리케이션, 해상 추락 감지 및 센서를 탑재한 구명 조끼, 자동 구조 작업 등의 기능을 통합하여 항만 근로자의 안전을 보장하며, 해수욕장 등 다양한 환경에서도 확장 가능한 창의적인 기술을 제시한다.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.26 no.5
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• pp.359-371
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• 2013

This paper is the first paper among two papers which constitute the paper about the rigid body dynamic analysis on the spent nuclear disposal canister under accidental drop and impact on to the ground. This paper performed the general theoretical study on the rigid body dynamic analysis. Through this study the impulsive force which is occurring in the spent nuclear fuel disposal canister under accidental drop and impact to the ground and required for the structural safety design of the canister is intended to be theoretically formulated. The main content of the theoretical study is about the equation of motion in the multibody dynamics. On the basis of this study the impulsive force which is occurring in the multibody in the case of collision between multibody is theoretically formulated. The application of this theoretically formulated impulsive force to computing the impulsive force occurring in the spent nuclear fuel disposal canister under accidental drop and impact to the ground is investigated.

• Journal of Korean Society of Disaster and Security
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• v.14 no.3
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• pp.39-49
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• 2021

According to the recent "Status of Industrial Accidents at the End of December 2020" released by the Ministry of Employment and Labor, each industry is subject to industrial accidents. The number of accident deaths by construction industry, accident deaths by accident type fell, and accident deaths by workplace size were 5 to 49, indicating that most accident deaths occurred due to falling accidents at small construction sites. Therefore, urban living houses are small construction sites, and the probability of falling accidents is very high. Fall simulation training for disaster occurrence is conducted mainly by large construction ordering organizations in the public sector, and it is the first case in Korea that a housing construction company has conducted at a small construction site. This study analyzed and presented the definition, construction characteristics, and safety management status of urban living houses, and developed and spread an emergency relief procedure manual in the event of a fall accident to minimize deaths.