Until fairly recently, an experienced trained operator identified signals, but now computers may do this.

The critical notation to date was that Braydic had identified signals from more than one hundred orbital satellites.

Among the calls, he identified signals for assembly, dispersal and hunger and a plaintive call made by crows that are dying.

It uses multiple materials to identify false signals from other light-creating processes.

Significant efforts have been made to identify early-warning signals of regime shifts.

The purpose is to identify early signals of possible environmental change and to detect environmental change already underway.

Learning to identify such signals in the critical period before population declines occur might greatly improve conservation efforts.

Time measurements are used to identify signals from impulse sources, such as from projectiles and bombs.

His group claims the ability to identify electromagnetic signals that are precursors to earthquakes.

The system involves the encoding of commercials with inaudible, identifying signals; test participants need do nothing to activate it.