A wave that is guided along the interface between two different media or by a refractive index gradient.
Note 1: The field components of the wave diminish with distance from the interface.
Note 2: Optical energy is not converted from the surface wave field to another form of energy and the wave does not have a component directed normal to… (Read More →)

Synonym impulse.

An assembly of one or more components intended to limit or divert surges; the device contains at least one nonlinear component. [T1.321-1995] Synonyms arrester, surge protector.

Synonyms arrester, surge protective device, surge protector.

See discretionary access control.

1. The use of (usually) electronic means, passive or active, to obtain information about the nature, position, or movement of, e.g., aircraft (cooperative or non-cooperative, friendly or unfriendly), sources of electromagnetic emissions, etc.
2. Nonintrusive monitoring of digital signals in real time to recognize performance degradations and failures and system intrusion attempts. [After T1.231-1997]

See path survey.

A property of a system, subsystem, equipment, process, or procedure that provides a defined degree of assurance that the named entity will continue to function during and after a natural or man-made disturbance; e.g., nuclear burst.
Note: For a given application, survivability must be qualified by specifying the range of conditions over which the entity will survive, the minimum acceptable… (Read More →)

See survivability.

A mobile station in the maritime mobile service or the aeronautical mobile service intended solely for survival purposes and located on any lifeboat, life-raft or other survival equipment. [NTIA] [RR]