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10/5/05 Meeting
Agenda
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Welcome to the 2nd HFES student chapter meeting of
2005-2006
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Meet at 4.30 pm in Baker Systems 210E
o Talk starts
at 5.00 pm
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Agenda:
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2005-2006 officer elections
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Membership renewal/recruitment,
membership dues
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Planning for future events/programs
- World Usability
Day event Nov 3 at LexisNexis
- Visit to Farm
Science Review: the tour to the universally designed kitchen
and bath
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List Serve for the Student Chapter
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Coordinating events with Design Circle Student Org
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Websites:
- Student chapter at the OSU: http://hfes.org.ohio-state.edu/
- Central Ohio Chapter:
http://www-iwse.eng.ohio-state.edu/ISEFaculty/sommerich/centralohhfes/
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Guest speaker: Gregory
Knapik (knapik.1@osu.edu)
- Development of a Biomechanical Model for Assessing
Pushing and Pulling Tasks
The makeup of industrial work
has recently changed, favoring pushing and pulling with carts and other material
handling devices instead of lifting. Accordingly, pushing and pulling are now
extremely prevalent in industry.
Unfortunately, there are very few biomechanical models of sufficient complexity
to accurately assess loads on the spine during pushing and pulling. Most models
are only two-dimensional, static, or rely on single-equivalent muscles. In
order to address the current void in biomechanical modeling, a
three-dimensional, dynamic, EMG-assisted model was developed that features a
more detailed representation of the lumbar spine that takes into account the
dynamic curvature of the spine and measures compressive and shear loads at
multiple lumbar levels.
This model was used to examine the spinal loads developed in 20 volunteers
that performed pushing and pulling exertions at three different handle heights,
at three hand force levels, and at two different handle degree of freedom
conditions.
Compressive loads were found to be below literature tolerance values at each
level of the lumbar spine. AP shear loads, however, were found to reach or
exceed tolerance limits at the higher lumbar levels, identifying a possible
mechanism for low back injury in pushing and pulling. Overall, spinal loads
were found to vary as a function of hand force level, handle height, and gender
at each lumbar level for both pushing and pulling.
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Open floor
Questions for Gregory
Knapik
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Human
Factors and Ergonomics Society