- 産業: Telecommunications
- Number of terms: 29235
- Number of blossaries: 0
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ATIS is the leading technical planning and standards development organization committed to the rapid development of global, market-driven standards for the information, entertainment and communications industry.
A prefix appended to the short title of U. S. -produced keying material to indicate its foreign releasability. "A" designates material that is releasable to specific allied nations and "U. S. " designates material intended exclusively for U. S. Use.
Industry:Telecommunications
A prefix generally indicating an association with The Internet or computerized business or office functions; e.g., an "e-file" (electronic file) or "e-commerce," (electronic commerce. )
Industry:Telecommunications
A preliminary statement of the basic security-relevant facts about a system. Note: An initial System Security Policy constitutes the basis for the Departmental Security Officer's risk assessment and Security requirement.
Industry:Telecommunications
A pre-production, functioning specimen (s) that is the first of its type, typically used for the evaluation of design, performance, and/or production potential. 2. A model suitable for evaluation of design, performance, and production potential.
Industry:Telecommunications
A prescribed structure of data used to represent the destination (s) of a block, message, packet, or other formalized data structure.
Industry:Telecommunications
A presentation unit of the audio channel; a group of consecutive audio samples. The preferred number of samples in an audio frame depends on the audio sample rate. These audio frames have no relationship to the frames designated by certain audio/speech codecs.
Industry:Telecommunications
A presentation unit of the data channel; a defined group of consecutive data bits. The preferred number of bits in a data frame depends on the application for the data channel.
Industry:Telecommunications
A primary frequency standard in which electronic transitions between the two hyperfine ground states of cesium-133 atoms control the output frequency. Note 1: The difference between the energy levels of the two hyperfine ground states of the cesium-133 atom corresponds, in the absence of external influences (e.g., the magnetic field of the Earth,) to electromagnetic radiation having a frequency of precisely 9,192,631,770 Hz (microwave regime. ) Note 2: The preceding is exact because by internationally recognized (SI) definition, the second is the interval required for 9,192,631,770 cycles of this radiation to occur in the absence of external influences. A very slightly higher, but known and controlled, transition rate occurs in realizeable cesium standards, making the second by far the most precisely determined SI base unit.
Industry:Telecommunications
A principle stating that a ray of light follows the path that requires the least time to travel from one point to another, including reflections and refractions that may occur. Synonym least-time principle.
Industry:Telecommunications
A principle stating that a ray of light follows the path that requires the least time to travel from one point to another, including reflections and refractions that may occur. Synonym least-time principle.
Industry:Telecommunications
