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A hand speed - duty cycle equation for estimating the ACGIH hand activity level rating.

Authors
Akkas-O; Azari-DP; Chen-C-H; Hu-YH; Ulin-SS; Armstrong-TJ; Rempel-D; Radwin-RG
Source
Ergonomics 2015 Feb; 58(2):184-194
NIOSHTIC No.
20045287
Abstract
An equation was developed for estimating hand activity level (HAL) directly from tracked root mean square (RMS) hand speed (S) and duty cycle (D). Table lookup, equation or marker-less video tracking can estimate HAL from motion/exertion frequency (F) and D. Since automatically estimating F is sometimes complex, HAL may be more readily assessed using S. Hands from 33 videos originally used for the HAL rating were tracked to estimate S, scaled relative to hand breadth (HB), and single-frame analysis was used to measure D. Since HBs were unknown, a Monte Carlo method was employed for iteratively estimating the regression coefficients from US Army anthropometry survey data. The equation: [Formula: see text], R2 = 0.97, had a residual range +/- 0.5 HAL. The S equation superiorly fits the Latko et al. ( 1997 ) data and predicted independently observed HAL values (Harris 2011) better (MSE = 0.16) than the F equation (MSE = 1.28).
Keywords
Hand-protection; Musculoskeletal-system; Musculoskeletal-system-disorders; Extremities; Force; Exposure-levels; Risk-factors; Repetitive-work; Physiological-effects; Physiology; Carpal-tunnel-syndrome; Exposure-assessment; Analytical-processes; Author Keywords: exposure assessment; repetitive motion; work-related musculoskeletal disorders
Contact
Robert G. Radwin, Department of Industrial and Systems Engineering, University of Wisconsin-Madison, 1550 Engineering Drive, Madison, 53706-1608
CODEN
ERGOAX
Publication Date
20150201
Document Type
Journal Article
Email Address
radwin@discovery.wisc.edu
Funding Type
Grant
Fiscal Year
2015
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R21-OH-010221; Grant-Number-R01-OH-007914; M102014
Issue of Publication
2
ISSN
0014-0139
Source Name
Ergonomics
State
WI; MI; CA
Performing Organization
University of Wisconsin-Madison
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