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

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.
• Subjects:
  Accidental Falls Biomechanical Phenomena Floors And Floorcoverings Friction Humans Reproducibility Of Results Shoes Surface Properties Time Factors
• Keywords:
  Buprenorphine Methadone Mortality Naltrexone Treatment
• Source:
  Appl Ergon. 82:102959
• Pubmed ID:
  31568960
• Pubmed Central ID:
  PMC6922306
• Document Type:
  Journal Article
• Funding:
  P30 AG024827/AG/NIA NIH HHSUnited States/ ; R44 AG059258/AG/NIA NIH HHSUnited States/ ; R01 OH010940/OH/NIOSH CDC HHSUnited States/ ; S10 RR027102/RR/NCRR NIH HHSUnited States/ ; R43 AR064111/AR/NIAMS NIH HHSUnited States/ ; R01 OH007592/OH/NIOSH CDC HHSUnited States/ ; R01 OH008986/OH/NIOSH CDC HHSUnited States/
• Volume:
  82
• Collection(s):
  CDC Public Access
• Main Document Checksum:
  urn:sha-512:31c1f8d70d26f7df157f7f512827d5864251fdc3c405987cfebdda7c937983cd2d946b18557078007fceb874db7d778819aed9756d801e3f26ac765393c208f2
• Download URL:
  https://stacks.cdc.gov/view/cdc/83675/cdc_83675_DS1.pdf
• File Type:
  [PDF - 1.43 MB ]