Some of the nation’s leading wireless giants and drone makers offered effusive praise of President Donald Trump on Thursday as they lobbied his administration to eliminate the federal regulations that stand in the way of their businesses.
Robots clean rivers and sort waste, monitor ecosystems, and inspect renewable-energy infrastructure. But even the greenest robot has an environmental footprint.
EPFL engineers have designed acoustic cavities that convert sound waves into thrust, propelling small robots and ultralight aerial vehicles without on-board actuators or electronics.