• Proceedings of KOSOMES biannual meeting
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• 2018.06a
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• pp.70-70
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• 2018

• The Journal of the Convergence on Culture Technology
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• v.5 no.4
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• pp.349-354
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• 2019

Workers who die from falls at construction sites account for about 40 percent of the total number of deaths and are the main forms of accidents. In addition, as the nation's population structure is gradually aging, the rate of aging is increasing at construction sites, and the number of crashes due to decreased physical function and cognitive ability is increasing. Accordingly, we conducted a survey on the factors affecting the fall of older workers and would like to present more fundamental measures to prevent falls, focusing on older workers who are the victims of the disaster.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.40 no.5
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• pp.469-481
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• 2016

In this paper, a mathematical methodology was theoretically studied to obtain the impact force caused by the collision between rigid bodies. This theoretical methodology was applied to compute the impact force applied on the spent nuclear fuel disposal canister that accidentally drops and collides onto the ground. From this study, the impact force required to ensure a structurally safe canister design was theoretically formulated. The main content of the theoretical study concerns the rigid body kinematics and equation of motion during collision between two rigid bodies. On the basis of this study, a general impact theory to compute the impact force caused by the collision between two bodies was developed. This general impact theory was applied to theoretically formulate the approximate mathematical solution of the impact force that affects the spent nuclear fuel disposal canister that accidentally falls to the ground. Simultaneously, a numerical analysis was performed using the computer code to compute the numerical solution of the impact force, and the numerical result was compared with the approximate mathematical solution.

• Electric Engineers Magazine
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• s.347
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• pp.44-46
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• 2011

• The Safety technology
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• no.41
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• pp.40-43
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• 2001

• Aerospace Industry
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• s.106
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• pp.68-69
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• 2010

지난 4월10일, 오전 10시 56분쯤 러시아 모스크바 서쪽 350km에 위치한 스몰렌스크 군용공항 활주로 부근에 Tu-154 폴란드 정부 전용기가 추락하는 사고가 발생했다. 이 사고로 레흐 카친스키(Kaczynski) 폴란드 대통령 부부를 비롯한 폴란드 정부대표단 88명과 승무원 8명 등 96명의 탑승객 전원이 사망했다. 일단 러시아 정부는 관제탑의 지시를 따르지 않고 무리하게 착륙을 시도한 조종사의 과실로 보고 있으나 정치적으로 민감한 사안이라 정확한 사고원인 규명에는 다소 시간이 소요될 것으로 전망된다. 이번 사고를 통해 항공사고 원인규명을 위한 항공사고 조사에 대해 알아본다.

• The Optical Journal
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• s.158
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• pp.55-57
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• 2015

여기저기서 드론이 뜨고 있다. 아마존이 날아오른 드론으로 고객의 문 앞까지 배달하는 모습은 일대 장관이었다. 이제 웬만한 방송에서 하늘 높이 오른 드론으로 내려다본 모습을 전송하는 것은 그저 일상일 뿐이다. 뿐만 아니라, 사람이 직접 닿을 수 없는 곳에서 드론으로 사람을 찾는다거나, 드론을 통해 고층건물의 안전도를 검사한다거나, 정찰을 하는 등 다양한 활용도가 돋보인다. 라스베가스의 세계가전전시회(CES)에서 바르셀로나의 모바일월드콩그레스(MWC)에서 그리고 뉴욕의 장난감전시회 에서도 드론은 스타로 부상했다. 이제 드론은 대중화와 상업적 성공의 기로에 서 있다. 이를 위해서는 기계적 성능이상으로 중요한 것이 드론과 사용자간의 상호작용을 통해 이루어내는 사용자 경험이다. 즉 드론을 얼마나 쉽고 편하고 정확하고 안전하게 조종할 수 있도록 만드는가가 차별화와 경쟁력의 시작이다. 만약 드론이 지금처럼 조종하기 어렵고 심지어 인명과 재산을 위협한다고 인식되면 산업적 잠재성은 그저 한여름 밤의 꿈으로 사그러들 수밖에 없다. 몇 가지 사례를 보자. 지난 2월 미국 Fox TV 생방송에서 Popular Science 잡지 편집장 Dave Mosher는 드론의 안전성에 관해서 말하고 있었다. 그 때 데모를 위해 날던 드론이 갑자기 균형을 잃으면서 추락하였다. 이 사고로 인해 드론이 안전하지 않을 수 있다는 인식이 퍼지게 되었다. 경미한 사고지만 심각한 위협감을 일으키기도 한다. 레이더에 탐지되지 않던 드론이 미국 백악관 앞마당에 추락한 것이 그런 예이다. 어떤 사용자는 재미삼아 드론을 구름 위까지 날려 보냈다. 그러더니 드론이 제어력을 상실하였고, 결국 추락하고 말았다. 다행히도 누군가의 머리 위로 떨어지지는 않았다.

• Korean Journal of Clinical Laboratory Science
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• v.56 no.3
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• pp.257-264
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• 2024

This study analyzed data from the Korea National Hospital Discharge In-depth Injury Survey (KNHDIS) (2004~2021) and found that for the young-old with disabilities, the location of injury was roads and main roads, the activity at the time of injury was daily life, the mechanism of injury was falling and the type of transportation accident was collision with passenger cars. In the old-old, the characteristics by type of injury were fractures, the intentionality of the injury was unintentional, the place of injury was residence, the activity at the time of injury was daily life, the mechanism of injury was falling and the type of transportation accident was pedestrian. In conclusion, the old-old were more likely to suffer injuries at home and in daily life than the young-old with disabilities, and old-old injured patients were more active than the old-old, resulting in higher falls and transportation accidents and older seniors were more likely to have pedestrian accidents. Based on the information collected from the young-old and old-old, it is believed that efforts to prevent damage that consider the characteristics of the elderly are necessary.

• Journal of the Korea Institute of Building Construction
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• v.22 no.3
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• pp.259-268
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• 2022

Electric shutters for buildings are being developed in Korea and abroad on a regular basis and can be used in different types of buildings such as company buildings and fire stations, etc. However, the fall risk factors induced by a variety of functions of building electric shutters require safety control. We reviewed the technological trends and legal standards in Korea and abroad, analyzed incident cases, and identified fall risk factors requiring control. We inspected all the building electric shutters in Korea based on the fall risk factors. As a result, we identified 91 noncompliance cases, in 69 percent of all 132 locations. In this study, backed by the inspection results, we suggest a check list to prevent the fall of building electric shutters to ensure safety and conduct verification using a focus group interview.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2011.06a
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• pp.388-389
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• 2011

Work at height by Rope access, including the marine plants are used in many industries, worldwide these workers are demanding IRATA certification due to danger of work. Also, the largest cause of death in National Industrial Accident is crash but nevertheless the training for worker at height is not carry out almost. In the here, introduce the kind of IRATA qualifications, training and membership, etc. and propose how could apply to korea it.