An optical fiber construction, usually a single-mode fiber, that has an outer cladding of approximately the same refractive index as the core, and an inner cladding of very low (depressed) refractive index material between them.

Pertaining to the pre-defined initial, original, or specific setting, condition, value, or action a system will assume, use, or take in the absence of instructions from the user. [From Weik '89]

An ACL which is used in determining the initial discretionary access control information for objects created within a directory [POSIX.6].

Department of Defense long-haul voice, data, and record traffic system which includes the Defense Data Network, Defense Satellite Communications Systems, and Defense Switched Network.

A component of the Defense Communications System used for switching Department of Defense automated data processing systems. [JP 1-02]

A component of the Defense Communications System that handles Department of Defense voice, data, and video communications.

A figure of merit for image quality.
Note: In an image, definition is usually expressed in terms of the smallest resolvable element, such as lines per inch, or pels per square inch.

1. A change in the direction of a traveling particle, usually without loss of particle kinetic energy, representing a change in velocity without a change in the scalar speed of the particle.
2. A change in the direction of a wave, beam, electron, or other entity, such as might be accomplished by an electric or magnetic field.
Note: If the… (Read More →)

1. To remove a residual magnetic field from a magnetized object, usually by introducing much stronger and gradually diminishing magnetic fields of alternating polarity.
2. Specifically, to erase information from a magnetic storage medium by degaussing.

[A] procedure that reduces the magnetic flux to virtual zero by applying a reverse magnetizing field. Synonymdemagnetizing. [INFOSEC-99]