Docked iPods can be controlled by a Yamaha receiver's remote control, and navigated by on-screen display on a television or monitor.

ENGADGET: Yamaha intros YSP-3050 Digital Sound Projector

She also described an idea for a remote-controlled torpedo: A radio transmitting directions and a receiver implementing them would be synchronized so that their frequencies could be changed simultaneously in a random manner.

WSJ: Book Review: Hedy's Folly

This method also has the advantage that the placement of the receiver allows the pacing of the heart to be very precisely controlled, says Dr Echt.

ECONOMIST: Case history