This paper addresses the trajectory tracking control of lower limb rehabilitation exoskeleton leg driven by hydraulic actuator with output constraint. A barrier Lyapunov function is utilized to handle ...

While residents enjoy Michigan's Great Lakes, invasive species may be, too. During Aquatic Invasive Species Awareness Week ...

A recently published study explores the relationship between sea spiders and bacteria. Discover more and meet one of the ...

These insects resemble tiny pieces of popcorn as they move about. Discover more about the waxy nymphs of the flatid ...