GPON Encapsulation Mode

A computer designed to perform, or that is capable of performing, in a reasonably efficient manner, the functions required by both scientific and business applications.
Note: A general purpose computer is often understood to be a large system, capable of supporting remote terminal operations, but it may also be a smaller computer, e.g., a desktop workstation.

See common user network.

A computer system that is designed to aid in solving a wide variety of problems [TCSEC].

In audio and video analog recording, pertaining to the number of duplication steps between an original recording and a given copy.
Note 1: A second generation duplicate is a copy of the original master and a third generation duplicate is a copy of a copy of the original master, etc.
Note 2: Relative to digital duplication, the copy is almost… (Read More →)

In analog recording, cumulative deterioration of signal quality introduced as a consequence of limitations of the recording electronics and storage medium, when successive copies of an original recording are made, each from the preceding copy.
Note 1: Examples of signal deterioration attributable to generation loss are increased distortion, increased noise, change in frequency response, and change in the relative phase… (Read More →)

The synchronization of two television signals at the vertical, horizontal, and chroma phase levels such that the signals may be cut, mixed, or cross-faded without noticeable roll, jump, or chroma shift.
Note: Modern usage accomplishes this with a frame synchronizer/time base corrector, but it may also be accomplished by a closed loop method or an open loop method, the latter… (Read More →)

The branch of optics that describes light propagation in terms of rays.
Note 1: Rays are bent at the interface between two dissimilar media, and may be curved in a medium in which the refractive index is a function of position.
Note 2: The ray in geometric optics is perpendicular to the wavefront in physical optics. Synonym ray optics.

See inverse-square law.

A circular orbit in the equatorial plane, any point on which revolves about the Earth in the same direction and with the same period as the Earth's rotation.
Note: An object in a geostationary orbit will remain directly above a fixed point on the equator at a distance of approximately 42,164 km from the center of the Earth, i.e., approximately… (Read More →)