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manual handling and avoidance of constrained pos-
tures.
ACKNOWLEDGMENTS
This work was partly funded by the German Ministry
for Education and Research (BMBF) within the joint
research projects SIRKA (grant 16SV6243). The au-
thors would like to thank all participants who par-
ticipated in the experiment. The photographs of
Figure 1 are used with courtesy of Meyer Werft
GmbH & Co. KG, Papenburg, Germany. This work
was additionally supported by the funding initiative
Nieders
¨
achsisches Vorab of the Volkswagen Founda-
tion and the Ministry of Science and Culture of Lower
Saxony as a part of the Interdisciplinary Research
Centre on Critical Systems Engineering for Socio-
Technical Systems II.
The authors would like to thank the anonymous
reviewers for their helpful comments.
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