Evolutionary theorist Stephen Jay Gould is famous for describing the evolution of humans and other conscious beings as a chance accident of history. If we could go back millions of years and “run the tape of life again,” he mused, evolution would follow a different path.
In 1913 in Southern California, two 241-mile-long electric lines began carrying power from hydroelectric dams in the Sierra Nevada to customers in Los Angeles—a massive feat of infrastructure. In 1923, power company Southern California Edison upgraded the line to carry 220,000 volts, among the highest voltage lines in the world at the time.
Crystalline materials have atoms that are neatly lined up in a repeating pattern. When they break, that failure tends to start at a defect, or a place where the pattern is disrupted. But how do defect-free materials break?
Cattle in the United States are generally managed to either produce milk or to produce beef. However, in most of the world, cattle are counted on to do both in what are called dual-purpose production systems.
The senior design classes held in each of the School of Engineering and Applied Science’s six departments are an opportunity for University of Pennsylvania students to put their skills to the test, by picking a real-world problem and developing a new piece of technology to solve it.
University of Pennsylvania astronomers are celebrating the dedication of a new planet-hunting telescope known as Minerva-Red. Installed at the Fred Lawrence Whipple Observatory in Arizona, Minerva-Red is part of the Minerva project, an array of low-cost telescopes that are designed to discover planets orbiting stars other than the sun.
By Madeleine Stone @themadstone
Bonding with a friend of a friend is something most humans gravitate toward naturally, or at least Facebook likes to think so every time it suggests friends for you to “friend.”
If you have a map, you can know where you are without knowing which way you are facing. If you have a compass, you can know which way you're facing without knowing where you are. Animals from ants to mice to humans use both kinds of information to reorient themselves in familiar places, but how they determine this information from environmental cues is not well understood.
The University of Pennsylvania is participating in two National Science Foundation projects designed to advance cyberphysical systems with medical applications. Cyberphysical systems are built from and depend upon the seamless integration of computation and physical components.