PMID- 24268803
OWN - NLM
STAT- MEDLINE
DCOM- 20141020
LR  - 20140127
IS  - 1872-9126 (Electronic)
IS  - 0003-6870 (Linking)
VI  - 45
IP  - 3
DP  - 2014 May
TI  - The stochastic distribution of available coefficient of friction for human 
      locomotion of five different floor surfaces.
PG  - 811-5
LID - S0003-6870(13)00215-9 [pii]
LID - 10.1016/j.apergo.2013.10.006 [doi]
AB  - The maximum coefficient of friction that can be supported at the shoe and floor 
      interface without a slip is usually called the available coefficient of friction 
      (ACOF) for human locomotion. The probability of a slip could be estimated using a 
      statistical model by comparing the ACOF with the required coefficient of friction 
      (RCOF), assuming that both coefficients have stochastic distributions. An 
      investigation of the stochastic distributions of the ACOF of five different floor 
      surfaces under dry, water and glycerol conditions is presented in this paper. One 
      hundred friction measurements were performed on each floor surface under each 
      surface condition. The Kolmogorov-Smirnov goodness-of-fit test was used to 
      determine if the distribution of the ACOF was a good fit with the normal, 
      log-normal and Weibull distributions. The results indicated that the ACOF 
      distributions had a slightly better match with the normal and log-normal 
      distributions than with the Weibull in only three out of 15 cases with a 
      statistical significance. The results are far more complex than what had 
      heretofore been published and different scenarios could emerge. Since the ACOF is 
      compared with the RCOF for the estimate of slip probability, the distribution of 
      the ACOF in seven cases could be considered a constant for this purpose when the 
      ACOF is much lower or higher than the RCOF. A few cases could be represented by a 
      normal distribution for practical reasons based on their skewness and kurtosis 
      values without a statistical significance. No representation could be found in 
      three cases out of 15.
CI  - Copyright (c) 2013 Elsevier Ltd and The Ergonomics Society. All rights reserved.
FAU - Chang, Wen-Ruey
AU  - Chang WR
AD  - Liberty Mutual Research Institute for Safety, 71 Frankland Road, Hopkinton, MA 
      01748, USA. Electronic address: Wen.Chang@LibertyMutual.com.
FAU - Matz, Simon
AU  - Matz S
AD  - Liberty Mutual Research Institute for Safety, 71 Frankland Road, Hopkinton, MA 
      01748, USA.
FAU - Chang, Chien-Chi
AU  - Chang CC
AD  - Liberty Mutual Research Institute for Safety, 71 Frankland Road, Hopkinton, MA 
      01748, USA.
LA  - eng
PT  - Journal Article
DEP - 20131121
PL  - England
TA  - Appl Ergon
JT  - Applied ergonomics
JID - 0261412
SB  - IM
MH  - Accidental Falls/prevention & control
MH  - *Floors and Floorcoverings/methods/standards
MH  - *Friction
MH  - Humans
MH  - *Locomotion
MH  - Stochastic Processes
OTO - NOTNLM
OT  - Available friction
OT  - Footwear material/floor interface
OT  - Surface contamination
EDAT- 2013/11/26 06:00
MHDA- 2014/10/21 06:00
CRDT- 2013/11/26 06:00
PHST- 2013/03/14 00:00 [received]
PHST- 2013/10/13 00:00 [accepted]
PHST- 2013/11/26 06:00 [entrez]
PHST- 2013/11/26 06:00 [pubmed]
PHST- 2014/10/21 06:00 [medline]
AID - S0003-6870(13)00215-9 [pii]
AID - 10.1016/j.apergo.2013.10.006 [doi]
PST - ppublish
SO  - Appl Ergon. 2014 May;45(3):811-5. doi: 10.1016/j.apergo.2013.10.006. Epub 2013 
      Nov 21.