We try the world’s first electric-powered ski, or E-Skimo, in Switzerland. The e-ski helps alleviate the effort of going ...

Abstract: Nonsmooth phenomena, such as abrupt changes, impacts, and switching behaviors, frequently arise in real-world systems and present significant challenges for traditional optimal control ...

Louis-Hunter Kean had visceral leishmaniasis, which he likely contracted from an insect bite while vacationing in Italy. But Penn doctors missed critical clues that might have saved him.