Almost any system composed of discrete pieces large enough that thermal fluctuations can be ignored can have a jamming transition: a point at which fluid flow is impeded by a change of state into a stable amorphous solid. The behavior is general enough to explain a pile of sand, a jar of candies, or cars in a traffic jam. Professor Andrea Liu was involved in recent theoretical breakthroughs in the study of this phenomenon.
Professor Bob Hollebeek was the technical lead for the National Library of Medicine sponsored National Digital Mammography Archive, which provides distributed grid systems for medical storage and records handling. Parallel and distributed computing approaches apply to the analysis of data from many fields including medical, scientific, social, and economic data.
Dark Energy Survey Camera
The focal plane of the DEcam - the camera for the Dark Energy Survey.
Carbon Nanotube FET Sensor
Schematic of a carbon nanotube FET sensor functionalized with an antibody to a Lyme disease biomarker protein. The insulating substrate is shown in pink. When antigen molecules bind to the antibody, the electrical characteristics of the FET are altered.
From the lab of Prof. Charlie Johnson.
DES First Light
One of the first images from the DECam (the half-gigapixel camera of the Dark Energy Survey) showing the barred spiral galaxy NGC 1365. Penn faculty and staff play a prominent role in leading the DES effort.
Professor Brody’s love of tennis, perhaps like Newton’s, was never quite matched by his skill. From fumbling tournaments in high school (“The coach gave up”), he progressed to four years of varsity play at MIT, and for one heady month coached the men’s team at the University of Pennsylvania where, for almost all his career, he was a physics professor.
If dark energy is hiding in the form of hypothetical particles called “chameleons,” a team of researchers at the University of Pennsylvania and the University of California, Berkeley, plans to flush them out.