Techniques to Assess Balance and Mobility in Lower-Limb Prosthesis Users by Charla Lindley Howard A Dissertation Presented in Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy Approved November 2017 by the Graduate Supervisory Committee: James Abbas, Chair Panagiotis Artemiadis James Lynskey Marco Santello Christopher Buneo ARIZONA STATE UNIVERSITY December 2017