Case Study: A Bio-Inspired Control Algorithm for a Robotic Foot-Ankle Prosthesis Provides Adaptive Control of Level Walking and Stair Ascent. - Uzma Tahir; Anthony L. Hessel; Eric R. Lockwood; John T. Tester; Zhixiu Han; Daniel J. Rivera; Kaitlyn L. Covey; Thomas G. Huck; Nicole A. Rice; Kiisa C. Nishikawa (Frontiers Robotics AI, 2018)