11.   The robot will be guided by the pinging sound emitted by devices attached to the black boxes.

12.   These devices emit a radio signal that can be tracked via satellite, often enabling quick recovery of the stolen vehicle.

13.   Beltsov said the devices emitted a high level of radiation that could be lethal even during brief contact.

14.   These simple devices emit an infrared beam.

15.   The device emits atoms instead of light -- the photons usually given off by a laser, the university team led by Wolfgang Ketterle announced in Cambridge, Massachusetts.