Archive – November 2011
People depend on lithium-ion batteries every day to power cellphones, laptops and other electronic devices, and perhaps one day to run cars. This video shows how Craig Arnold, an associate professor of mechanical and aerospace engineering at Princeton University, is working to make those batteries last longer and provide more energy.
Professors Alexander Smits (Princeton) and Hilary Bart-Smith (University of Virginia) decided to arrange a competition between their students to see who could design the best manta ray inspired robot. Mohammad Javed '11, a mechanical engineering major, took on the project as a senior thesis and represented Princeton.
Last year, applied mathematician Jeffrey Aristoff and mechanical engineer Howard Stone, both of Princeton University, were at the gym waiting for a pickup game of basketball. To warm up, Stone started jumping rope. As the rope whizzed over the head of his colleague, Aristoff wondered, "Is it known how jump ropes bend in the wind?" A few literature searches later, he concluded that the answer was, "not really." Now, the two have solved the problem themselves.