Smart parking uses low-cost sensors, real-time data collection, and mobile-phone-enabled automated payment systems that help drivers quickly find a parking spot, Rucks and Guevara-Stone write. The system reduces car emissions in urban centers by reducing the need for people to needlessly circle city blocks searching for parking.
China's Uighers, an ethnic minority in western China, have long been accused by Beijing of terrorist tactics. Focus has turned to them after an apparent attack in Tiananmen Square.
Unfazed by the cancellation of the Philadelphia Orchestra's scheduled season opener at Carnegie Hall, the symphony throws open its doors for a free concert at the Kimmel Center in Philadelphia.