• 제목/요약/키워드: Fall accident

검색결과 301건 처리시간 0.026초

주파수 공간상의 특징 데이터를 활용한 손목에 부착된 가속도 센서 기반의 낙상 감지 (Fall detection based on acceleration sensor attached to wrist using feature data in frequency space)

  • 노정현;김진헌
    • 스마트미디어저널
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    • 제10권3호
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    • pp.31-38
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    • 2021
  • 낙상사고는 언제, 어디에서 일어날지 예측하기 어렵다. 또한 신속한 후속 조치가 수행되지 않으면 생명의 위협으로 이어지므로 낙상사고를 자동으로 감지할 수 있는 연구가 필요하게 되었다. 자동적인 낙상사고 감지기법 중 손목에 부착된 IMU 센서를 활용한 기법은 움직임이 많아 낙상사고 검출이 어렵지만, 착용의 간편함과 접근성이 뛰어난 기법으로 인식되고 있다. 낙상 데이터 확보의 어려움을 극복하기 위해 본 연구는 KNN과 SVM과 같은 머신러닝으로 적은 데이터를 효율적으로 학습하는 알고리즘을 제안한다. 또한, 이들 수학적 분류기의 성능을 높이기 위해 본 연구에서는 주파수 공간에서 취득한 특징 데이터를 활용하였다. 제안된 알고리즘은 표준 데이터세트를 활용한 실험을 통해 모델의 파라미터와 주파수 특징 추출기의 파라미터를 다각화하여 그 영향을 분석하였다. 제안된 알고리즘은 학습 데이터를 확보하기 어려운 현실적인 문제에 적절히 대처할 수 있었다. 또한 본 알고리즘이 다른 분류기보다 경량화되어 있기 때문에 SIMD(Single Instruction Multiple Data) 처리장치 탑재가 어려운 소형 임베디드시스템에도 구현이 용이했다.

Hazardous Factors and Accident Severity of Cabling Work in Telecommunications Industry

  • Kim, Yang Rae;Park, Myoung Hwan;Jeong, Byung Yong
    • 대한인간공학회지
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    • 제35권3호
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    • pp.155-163
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    • 2016
  • Objective: This study aims to draw the characteristics of occupational accidents occurred in cabling work, and assess accident severity based on occupational injury data. Background: Accident factors and accident risk are different by the place of work in cabling work. Field managers require information on accident prevention that can be easily understood by workers. However, there has been a lack of studies that focus on cabling work in Korea. Method: This study classifies 450 injured persons caused in cabling work by process, and analyzes the characteristics of occupational injuries from the aspects of age, work experience and accident type. This study also analyzes accident frequency and severity of injury. Results: Results show that preparing/finishing (33.3%) was the most common type of cabling process in injuries, followed by maintenance (28.4%), routing/income (23.1%) and wiring/installation (15.1%) process. The critical incidents in the level of risk management were falls from height in the routing/incoming process, and falls from height in the maintenance process. And, incidents ranked as 'High' level of risk management were slips and trips, fall from height and vehicle incident in the preparing/finishing process, and fall from height in the wiring/installation process. Conclusion and Application: The relative frequency of accident and its severity by working process serve as important information for accident prevention, and are critical for determining priorities in preventive measures.

이동식 사다리 추락 재해 예방을 위한 안전 제도의 문제점과 개선 과제 (Tasks for Improving Safety Systems on Fall Accident Prevention of Portable Ladders)

  • 황종문;신성우
    • 한국안전학회지
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    • 제35권5호
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    • pp.86-94
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    • 2020
  • Portable ladders are normally used both as an access tool for ascending and descending and as a platform for high place work. Though convenient, such usages make the portable ladders vulnerable to fall accidents. For this reason, many safety systems such as regulations and certifications are implemented to prevent fall accidents of portable ladders. However, nevertheless of those safety systems in Korea, annual death tolls of ladder fall accidents has remained high, and which suggests modification and improvement of the portable ladder related safety systems in Korea. The aim of this study is to propose directions for improving safety systems to effectively prevent fall accidents of portable ladders. To this end, comparative analysis on safety systems implemented in Korea and other countries including Japan, USA and UK are conducted to investigate the problems of Korean safety systems. Based on the analysis, limitations of Korean safety systems to prevent ladder fall accidents are discussed and tasks to overcome the limitations are proposed. Once implemented, the proposed tasks would contribute to prevent ladder fall accidents effectively.

중소형 건설현장의 추락재해 영향요인 분석 연구 (A Study on the Influencing Factors of Falling Disaster in Small and Medium-sized Construction Sites)

  • 이지엽;이재현;손승현;김지명;손기영
    • 한국건축시공학회지
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    • 제23권6호
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    • pp.821-830
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    • 2023
  • 본 연구에서 회귀분석을 통한 중소형 건설 현장 추락재해에 대한 안전사고 위험요소를 추출하기 위해 첫째, 10년간의 중소형 건설 현장에서 발생한 추락재해에 대한 데이터를 수집하였으며 둘째, t-test를 통해 중소형 건설 현장과 대형 건설 현장 두 그룹 사이의 추락재해 발생 시 진료일수의 차이가 있다는 것을 증명하였다. 마지막으로 회귀분석을 실시하여 안전사고 위험 요소에 대한 회귀 모델을 도출하였다. 추락재해에 영향을 미치는 요소는 사고 시간, 사고 요일, 직업 분류 순으로 크게 작용하는 것으로 나타났다. 본 연구 결과는 건설 현장 규모에 따른 정책 개선 및 통계분석을 위한 기초자료와 중소형 건설 현장 위험 정량화 연구의 기초자료로 활용될 것으로 사료된다.

중공업과 건설업에서 새로운 전신 안전대 개발을 위한 사용실태에 대한 연구 (A Study on User Experience Survey for Development of New Full Body Harness in Heavy and Construction Industry)

  • 김대식;김유창
    • 한국안전학회지
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    • 제31권6호
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    • pp.67-73
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    • 2016
  • According to industrial accident analysis of the Ministry of Employment and Labor in 2013, 38 workers were injured by fall accidents on average per day, and one worker died on average per day among them. In various industries such as heavy and construction industry, the full body harness is commonly used to prevent the fall accident. In developing full body harness, the designer considered only the workers' safety, without taking into account comfort and workability. The survey was conducted so as to search the problems of full body harness currently used by workers in heavy and construction industry. The survey questionnaire was given to 565 workers wearing full body harness in heavy and construction industry. The results of study showed that the development of new full body harness considering body size of korean was needed. The impotent factors for developing of new full body harness were the size and the weight of the full body harness. The full body harness taking into account body size was judged to contribute to more comfortable work, work efficiency and safety. The result of this study can be utilized as useful data in the development of new full body harness considering the body size of korean workers.

1개 종합병원 환자의 낙상에 관한 조사 (A Study on Fall Accident)

  • 이현숙;김매자
    • 대한간호
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    • 제36권5호
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    • pp.45-62
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    • 1998
  • The study was conducted from November 1995 to May 1996 at the one general hospital in Seoul. The total subjects of this study were 412 patients who have the experience of fall accident, among them 31 was who have fallen during hospitalization and 381 was who visited emergency room and out patient clinic. The purposes of this study were to determine the characteristics, risk factors and results of fall accident and to suggest the nursing strategies for prevention of fall. Data were collected by reviewing the medical records and interviewing with the fallers and their family members. For data analysis, spss/pc+ program was utilized for descriptive statistics, adjusted standardized $X^2$-test. The results of this study were as follows: 1) Total subjects were 412 fallers, of which 245(59.5%) were men and 167(40.5%) were women. Age were 0-14 years 79(19.2%), 15-44 years 125(30.4%), 45-64 years 104(25.2%), over 65 years 104(25.2%). 2) There was significant association between age and the sexes ($X^2$=39.17, P=0.00). 3) There was significant association between age and history of falls ($X^2$=44.41. P= .00). And history of falls in the elderly was significantly associated with falls. 4) There was significant association with age and medical diagnosis ($X^2$=140.66, P= .00), chief medical diagnosis were hypertension(34), diabetis mellitus(22), arthritis(11), stroke(8), fracture(7), pulmonary tuberculosis(6), dementia(5) and cataract(5), 5) There was significant association between age and intrinsic factors: cognitive impairment, mobility impairment, insomnia, emotional problems, urinary difficulty, visual impairments, hearing impairments, use of drugs (sedatives , antihypertensive drugs, diuretics, antidepressants) (P < 0.05). But there was no significant association between age and dizziness ($X^2$=2.87, P=.41). 6) 15.3% of total fallers were drunken state when they were fallen. 7) Environmental factors of fall accident were unusual posture (50.9%), slips(35.2%), trips (9.5%) and collision(4.4%). 8) Most of falls occurred during the day time, peak frequencies of falls occurred from 1pm to 6pm and 7am to 12am. 9) The places of fall accident were roads(22.6%), house-stairs 06.7%), rooms, floors, kitchen (11.2%), the roof-top, veranda, windows(10.9%), hospital(7.5%), ice or snowy ways(5.8%), bathroom(4.9%), playground, park(4.9%), subway-stairs(4.4%) and public-bathrooms (2.2%). 10) Activities at the time of fall accident were walking(37.6%), turning around or reaching for something(20.9%), going up or down stairs09.2%), exereise, working07.4%), up or down from a bed(2.7%), using wheelchair or walking aids, standing up or down from a chair(2.2%) and standing still(2.2%). 11) Anatomical locations of injuries by falls were head, face, neck(31.3%), lower extremities (29.9%). upper extremities(20.6%), spine, thorax, abdomen or pelvic contents(l1.4%) and unspecified(2.9%). 12) Types of injures were fracture(47.6%), bruises03.8%), laceration (13.3%), sprains(9.0%), headache(6.6%), abrasions(2.9%), intracranial hemorrage(2.4%) and burns(0.5%). 13) 41.5% of the fallers were hospitalized and average of hospitalization was 22.3 days. 14) The six fallers(1.46%) died from fall injuries. The two fallers died from intracranial hemorrage and the four fallers died of secondary infection; pneumonia(2), sepsis(1) and cell lulitis(1). It is suggested that 1) Further study is needed with larger sample size to identify the fall risk factors. 2) After the fall accident, comprehensive nursing care and regular physical exercise should be emphasized for the elderly person. 3) Safety education and safety facilities of the public place and home is necessary for fall prevention.

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도시형 생활주택신축공사의 추락재해 발생대비 모의훈련 실시 매뉴얼 개발 및 적용 (Development of a Manual for Simulation Training in Preparation for the Fall Disasters of Urban Residential Housing Construction Works and Apply)

  • 김성수
    • 한국방재안전학회논문집
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    • 제14권3호
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    • pp.39-49
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    • 2021
  • 고용노동부가 최근 발표한 '2020년 12월 말 산업재해 현황'에 따르면 산업별로 산업재해 대상이 되고 있다. 건설업별 사고사망자 수, 사고유형별 사고사망자 수, 사업장 규모별 사고사망자 수는 5~49명으로 소규모 건설현장에서 추락사고가 대부분 발생한 것으로 나타났다. 따라서 도시형 생활주택은 소규모 건설현장으로 낙상사고 발생 확률이 매우 높다. 재해 발생을 위한 가을 모의훈련은 공공부문의 대형 건설 발주기관 위주로 실시되며 소규모 건설현장에서 주택건설업체가 실시하는 것은 국내 최초다. 본 연구는 도시생활주택의 정의, 시공특성, 안전관리 실태 등을 분석·제시하고 추락사고 발생시 긴급구호절차 매뉴얼을 개발·확산하여 사망을 최소화하였다.

소규모 건설현장 떨어짐 사망재해 저감방안 연구 - 비계 및 작업발판 중심 - (Research of the reduction measures for fall accident death in small scale construction sites. - On the Basis of work plate and scaffolding -)

  • 유현동;강경식
    • 대한안전경영과학회지
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    • 제16권3호
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    • pp.55-62
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    • 2014
  • During five years (Year 2009~2013), Total victims of 72 %(81,560 people) and those 50.6 %(1,258 people) of death accident occurs in small scale construction site which operate 2 million USD less construction budget. Especially, falling death accident account for 785 people, in the share of 33.2 %(261 people) death disaster takes due to defect of original cause materials. The major safety issues in small scale work place take place while scaffold installation, disassembling, work-plate improper installation or non-professional skills of workers. Furthermore, labor subcontract systems make small construction site shortage of resources. Those workers regard work-plate as unnecessary and consumables supplies. Because of that most of workers use unsafe workplace in most construction site. Therefore, in order to prevent falling accident occurring in small scale work site, government should organize related regulations such as "Work site safety construction method" and then expands education support, financial aid, and sourcing safety supplies for work plate which offer broad variety experiences. Also, introduce certificate solutions for various work plates to improve safety function such as anchoring type method and anti sliding function.

교육시설 공사현장의 추락예방 보호구 지급개선에 관한 연구 (A Study of Protective Gear Provision Improvement for Preventing an Accidental Fall in Construction Field of Educational Facilities)

  • 이경훈;김정호
    • 교육녹색환경연구
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    • 제13권2호
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    • pp.26-34
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    • 2014
  • Recently, a series of massive earthquakes have been occurred northeast Asia and there has also been constant sensible earthquakes in South Korea. Particularly, after diagnosing educational facilities with Sichuan earthquake momentum, remodeling construction of old educational facilities and buildings which were not designed not to resist earthquake are actively underway. Remodeling construction sites, however, are mostly small construction sites which consist of less than 30 full-time laborers, where a number of deaths from a fall occur by improper uses of protective gear. Therefore, to reduce the disaster from a fall caused by inadequate uses of protective gear in domestic small construction sites such as those for remodeling, this study conducts research into ways of decreasing accident rates by suggesting providing and administering protective gear as a national project so that donning protective gear is activated.

Trauma-Associated Hyperglycemia after Fall Accident in Three Dogs

  • Ji, Sumin;Kim, Na-Yon;Kim, Myung-Chul;Lee, Hong-Seok;Hwang, Sung-Hyun;Kim, Yongbaek
    • 한국임상수의학회지
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    • 제35권2호
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    • pp.67-69
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    • 2018
  • Three dogs were referred for emergency care after fall accidents. All cases showed hyperglycemia at initial testing, with no history of diabetes mellitus. After varying periods of time, the blood glucose levels in all cases returned to within the reference range. The present report describes three cases of typical trauma-associated hyperglycemia in dogs.