School of Engineering & Applied Science
PHILADELPHIA - A research team led by a University of Pennsylvania mechanical engineer has discovered that friction between two sliding bodies can be reduced at the molecular, or nanoscale, level by changing the mass of the atoms at the surface. Heavier atoms vibrate at a lower frequency, reducing energy lost during sliding.
The study appears in the November issue of the journal Science.
PHILADELPHIA - "Little Ben," the autonomous vehicle engineered by University of Pennsylvania and Lehigh University faculty and students to drive itself, has advanced to the finals of the 2007 DARPA Urban Challenge.