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    Tytuł:
    Research on peripheral clamping of large-aperture laser transport mirror
    Autorzy:
    Cao, Tingfen
    Liu, Bowu
    Wang, Hui
    Ni, Wei
    Zhang, Jinli
    Chen, Xiaojuan
    Li, Yingang
    Zhou, Hai
    Jiang, Xiaodong
    Hu, Dongxia
    Zhu, Qihua
    Powiązania:
    https://bibliotekanauki.pl/articles/27310087.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    transport mirror
    peripheral clamping
    surface distortion
    assembly structure
    Opis:
    This article introduces the study of peripheral clamping for large-aperture laser mirrors in high power laser facilities. Some multi-point clamping schemes were experimentally tested, the results of the experiments show that these schemes cannot meet the technical requirements, and in the simulation analysis, we explain the reason for this phenomenon. It is concluded that the additional bending moment caused by the non-ideal process factors in the multi-point clamping is the main cause for the surface distortion. Based on the above conclusions, we carried out research on minor-point clamping. Experimental verification of the minor-point clamping were done, the results show that the minor-point clamping can meet the requirements of technical indicators in whole process. This work can provide a reference for the design of the large-aperture transport mirror clamping structure, which may be used in huge laser devices and telescopes.
    Źródło:
    Optica Applicata; 2023, 53, 2; 227--238
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation and analysis of occupational physical injuries among healthcare staffs during allopatric medical aid for the fight against COVID-19
    Autorzy:
    Gao, Chaona
    Ma, Guanzhong
    Jiao, Dongdong
    Guo, Jinli
    Zhang, Yonggang
    Zhu, Liping
    Li, Jianli
    Lou, Yanli
    Dong, Honglin
    Powiązania:
    https://bibliotekanauki.pl/articles/2082514.pdf
    Data publikacji:
    2022-06-20
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    risk factors
    personal protective equipment
    emergencies
    surveys and questionnaires
    SARS-CoV-2
    occupational injuries
    Opis:
    Background: Occupational health impairment of medical personnel manifested as a prominent problem in COVID-19. The aim of this study is to investigate the occupational physical injuries of front-line medical staffs in Hubei province during the fight against COVID-19. Material and Methods: questionnaire survey was conducted among 476 medical staffs from 3 regions of Hubei Province, including general characteristics and the physical discomfort/damage suffered in the isolation wards during working hours. Results: A total of 457 valid questionnaires were collected. The common physical discomfort/damage included skin injuries (22.76%), conjunctivitis (15.10%), falls (9.19%), intolerant unwell symptoms (8.53%) and sharp injuries (6.13%). Logistic regression analysis showed that: lack of protective work experience (OR = 2.049, 95% CI: 1.071–3.921), continuous working for 4 h (OR = 3.771, 95% CI: 1.858–7.654), and working >4 h (OR = 7.076, 95% CI: 3.197–15.663) were high-risk factors for skin injuries. Working continuously for 4 h (OR = 3.248, 95% CI: 1.484–7.110) and working >4 h (OR = 3.096, 95% CI: 1.232–7.772) were high-risk factors for conjunctivitis. Lack of protective work experience was a high risk factor for falls (OR = 5.508, 95% CI: 1.299–23.354). The high risk factors for intolerant unwell symptoms were continuous working for 4 h (OR = 5.372, 95% CI: 1.239–23.301) and working >4 h (OR = 8.608, 95% CI: 1.843–40.217). Working in a COVID-19 critical care unit (OR = 3.249, 95% CI: 1.344–7.854) and implementation of nursing (OR = 9.766, 95% CI: 1.307–72.984) were high risk factors for sharp injuries. Conclusions: Occupational physical injuries are universal in the COVID-19 ward. Those who take up nursing, work in a critical care ward, with no experience in an isolation ward for infectious diseases, and work continuously for ≥4 h on the same day should get more attention.
    Źródło:
    Medycyna Pracy; 2022, 73, 3; 209-218
    0465-5893
    2353-1339
    Pojawia się w:
    Medycyna Pracy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-2 z 2

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