PHILADELPHIA — Renaissance architects demonstrated their understanding of geometry and physics when they built whispering galleries into their cathedrals. These circular chambers were designed to amplify and direct sound waves so that, when standing in the right spot, a whisper could be heard from across the room. Now, scientists at the University of Pennsylvania have applied the same principle on the nanoscale to drastically reduce emission lifetime, a key property of semiconductors, which can lead to the development of new ultrafast photonic devices.
School of Arts & Sciences
Anthea Butler of the School of Arts and Sciences comments on the polarized reactions to Republican presidential candidate Michelle Bachmann.
Robert Seyfarth of the School of Arts and Sciences comments on study of alpha male baboons.
PHILADELPHIA — Almost everyone has experienced one memory triggering another, but explanations for that phenomenon have proved elusive. Now, University of Pennsylvania researchers have provided the first neurobiological evidence that memories formed in the same context become linked, the foundation of the theory of episodic memory.
PHILADELPHIA –- Lorene Cary, who teaches creative writing at the University of Pennsylvania, will discuss and sign copies of her book, "Free! Great Escapes from Slavery on the Underground Railroad," at a special Penn Bookstore program for young adult readers on Monday, July 11, at 5 p.m. The bookstore is at 36th and Walnut streets on the Penn campus.