Influence of Averaging Time-Interval on Shoe-Floor-Contaminant Available Coefficient of Friction Measurements

Beschorner, Kurt E.; Iraqi, Arian; Redfern, Mark S.; Moyer, Brian E.; Cham, Rakié

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Influence of Averaging Time-Interval on Shoe-Floor-Contaminant Available Coefficient of Friction Measurements

Published Date:

September 27 2019

Source:

Appl Ergon. 82:102959

Language:

English

Public Access Version Available on: January 01, 2021, 12:00 AM

Please check back on the date listed above.

Details:

Alternative Title:

Appl Ergon

Personal Author:

Beschorner, Kurt E. ; Iraqi, Arian ; Redfern, Mark S. ; Moyer, Brian E. ; Cham, Rakié ;

Description:

Available coefficient of friction (ACOF) is a common metric of footwear traction performance. ACOF is the ratio of friction to normal force, often averaged over a time-interval. The time-interval needed to achieve repeatable and valid ACOF is unknown. A post-hoc analysis was performed on nine shoe-floor-contaminant combinations to assess the repeatability and bias of data averaged across 4 time-intervals (2 ms, 50 ms, 100 ms, 200 ms) after the target normal force was reached. The ability to predict human slips was assessed for ACOF across these intervals. Differences in repeatability and validity across the four intervals were small. However, statistically significant differences were observed for the shortest compared with the longest interval (lower repeatability yet modestly improved predictive ability). Given the limited impact of time-interval on the results, a shorter interval of 50 ms is recommended to enable testing of smaller floor samples.

Subject:

[+]

Pubmed ID:

31568960

Pubmed Central ID:

PMC6922306

Document Type:

Journal Article

Funding:

R44 AG059258/AG/NIA NIH HHS/United States ; R01 OH010940/OH/NIOSH CDC HHS/United States ; S10 RR027102/RR/NCRR NIH HHS/United States ; R43 AR064111/AR/NIAMS NIH HHS/United States ; R01 OH007592/OH/NIOSH CDC HHS/United States ; ... More ▼

Collection(s):

CDC Public Access

Main Document Checksum:

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Supporting Files:

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