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Rehabilitation Engineering and Applied Research Lab (REAR Lab)

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    Video: Skeletal Displacement and Shear Strain Example During Head of Bed Elevation
    (Georgia Institute of Technology, 2019) Sonenblum, Sharon E. ; Sprigle, Stephen
    This realtime MRI video demonstrates the caudal displacement of the spine relative to the skin when the head of the bed is elevated 30 degrees. Friction with the sheets keeps the skin from slipping. This video is a great teaching tool to demonstrate internal shear strain in the adipose near the sacrum and coccyx, and it serves as a nice counterpart to the published article: Sprigle, S. and S. Sonenblum, Visualizing Tissue Strain Under the Sacrum and Coccyx in Different Supine Postures: A Case Series. Adv Skin Wound Care, 2019, in which static measurements of skeletal displacement are reported.
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    Video Demonstrations of Component- and Systems-Level Test Methods for Wheelchair Propulsion Characterization
    (Georgia Institute of Technology, 2018-11) Huang, Morris ; Misch, Jacob ; Sprigle, Stephen
    The five videos included in this repository demonstrate the fundamental test methods used to characterize performance of various wheelchair components. The Anatomical Model Propulsion System (AMPS) was designed to emulate the weight distribution and force application of a human wheelchair user. Three canonical maneuvers were identified to quantify the effects of rolling resistance, drive wheel scrub, and caster swivel. The ‘AMPS straight.mp4’ file shows the straight maneuver. ‘AMPS left FW turn.mp4’ demonstrates a fixed-wheel turn, where one wheel is locked and scrubbing against the floor as the chair drives the other wheel. The ‘AMPS CCW.mp4’ shows an alternating zero-radius maneuver designed to cause caster swivel by driving the wheels in opposing directions. Also included in this directory are videos representing the standalone coast-down and scrub torque component tests. ‘Caster Wheel Coast-down Test Video.m4v’ shows the coast-down cart loaded with weights and instrumented with accelerometers to log the deceleration of the cart. This test measures the force of rolling resistance acting on the cart. The final video, ‘scrub test demo.mp4’, shows the test rig used to measure scrub torque. A ZwickRoell materials testing machine pulls the steel cable attached to a pulley system, which rotates the load arm and effectively scrubs the tile or carpet swatch against the fixed wheel. These videos were taken in 2017 to use as demonstrations for future researchers and collaborators. More information can be found in Morris Huang’s dissertation located at http://hdl.handle.net/1853/59253.