![Robohub Podcast show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/018/920/small/robots-the-podcast-for-news-and-views-on-robotics.jpg)
Summary: In this episode, Audrow Nash interviews Peter Adamczyk, Assistant Professor at the University of Wisconsin-Madison, on semi-active foot and ankle prostheses. The difference is that active below-knee prostheses work to move the person’s weight, emulating the calf muscle, while semi-active devices use small amounts of power to improve the performance of the prosthesis. Adamczyk discusses the motivation for semi-active devices and gives three examples: shiftable shapes, controllable keels, and alignable ankles.