Ioana PatringenaruJacobs School of Engineering at UC San Diego Smartphone Sensors Record Timely, Accurate Air Quality Portable sensors allow users to monitor exposure to pollution with smartphones. Against the Arapaima, the Piranha Scores but Doesn't Win Put a school of starving piranha and a 300-pound (130 kilogram) fish together, and who comes out the winner? By Ioana Patringenaru Published 28 March 12