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A patching facility designed for patching and monitoring digital data circuits at data signaling rates from 1 Mb/s (megabits per second) to 3 Mb/s.
- Browse Related Terms: coaxial patch bay, M-patch bay, MM patch bay, patch bay, patch panel, test center, visual display unit (VDU), voice frequency (VF) primary patch bay
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Abbreviation for Motion Picture Experts Group. 2. In digital television signal recording or transmission, the designator that identifies a certain coding algorithm having several levels and profiles, the most sophisticated of which are used for HDTV (high-definition television) applications. Note: M-PEG-2 video coding has been developed for use with satellite TV applications, including the required decoders ("set-top boxes"). 3. The designator that identifies an international standard for compression of TV signals, which standard is used in conjunction with desktop computers for video presentations or clips. 4. Pertaining to files (with file-name extensions ".mpg" or ".mpeg") that are compressed using the MPEG standard. [Bahorsky] Also written MPEG.
- Browse Related Terms: archive file, archiving, AVI (.avi), backward recovery, cinepak, compound document, file, M-PEG, MP3, RIP, SMIL, split screen, tag image file format (TIFF), TIFF, watermark
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An attribute of a subject or object which represents the sensitivity of the subject or object and is used for mandatory access control decisions. The contents of MAC labels are implementation defined [POSIX.6].
- Browse Related Terms: access period, access permission, access profile, Availability, Bell-La Padula security model, Confidentiality, MAC label, object reuse, read, reference monitor concept, reference monitoring, remanence, scanning spot, secure state, secure subsystem, Security Level, TCB subset [FC Ver 1.0 Dec 1992], Ticket, ticket-oriented, tranquility, write
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In telecommunications, computer, and data processing systems, pertaining to operations, procedures, computer programs, and processing that do not depend upon specific hardware for their successful execution. [From Weik '89]
- Browse Related Terms: access type, assembly time, asynchronous operation, audit review file, background processing, base address, Batch Processing, Buffer Overflow, computer system, emulate, file privilege flag, machine-independent, malicious applets, multiprogramming, Object, overlay, Parallel Processing, process, restart, Run, simple buffering, Software Engineering, supervisory program, time-sharing
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An instruction that is written in a machine language and can be executed directly by the processor for which it was designed without translation or interpretation.
- Browse Related Terms: assemble, compile, FM broadcast translator, machine instruction, machine language, source language, source program, target language, television broadcast translator
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A language that need not be modified, translated, or interpreted before it can be used by the processor for which it was designed. Note 1: The operation codes and addresses used in instructions written in machine language can be directly sensed by the arithmetic and control unit circuits of the processor for which the language is designed. Note 2: Instructions written in an assembly language or a high-level language must be translated into machine language before they can be executed by a processor. Note 3: Machine languages are usually used by computer designers rather than computer users.
- Browse Related Terms: assemble, compile, FM broadcast translator, machine instruction, machine language, source language, source program, target language, television broadcast translator
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The ability of a device to improve its performance based on its past performance.
- Browse Related Terms: application protocol, audit record field, computer system fault tolerance, failure, fault, Fault Tolerance, machine learning, operand, Performance, performance anomalies, performance reliability, reliability, reliability (performance), remote orderwire, system robustness
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Synonym computer-oriented language.
- Browse Related Terms: assembler, assembly program, computer language, computer-dependent language, machine-oriented language
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A medium capable of storing data in a form that can be accessed by an automated sensing device. Note: Examples of machine-readable media include (a) magnetic disks, cards, tapes, and drums, (b) punched cards and paper tapes, (c) optical disks, and (d) magnetic ink characters. Synonym automated data medium.
- Browse Related Terms: angstrom (Å), bar code, beamsplitter, conservation of radiance, machine-readable medium, optical path length, optical thickness, soft sectoring, telecommunication, xerographic recording
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Synonym computer word.
- Browse Related Terms: ADP system, bandwidth•length product, computer system resilience, computing system, machine word, planar waveguide, protection, receiver lockout system, text processing, two-sample variance
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A relatively large-radius bend in an optical fiber, such as might be found in a splice organizer tray or a fiber-optic cable that has been bent. Note: A macrobend will result in no significant radiation loss if it is of sufficiently large radius. The definition of "sufficiently large" depends on the type of fiber. Single-mode fibers have a low numerical aperture, typically less than 0.15, and are therefore are more susceptible to bend losses than other types. Normally, they will not tolerate a minimum bend radius of less than 6.5 to 7.5 cm (2.5 to 3 inches). Certain specialized types of single-mode fibers, however, can tolerate a far shorter minimum bend radius without appreciable loss. A graded-index multimode fiber having a core diameter of 50
m and a numerical aperture of 0.20 will typically tolerate a minimum bend radius of not less than 3.8 cm (1.5 inches). The fibers commonly used in customer-premises applications (62.5-m core) typically have a relatively high numerical aperture, (approximately 0.27), and can tolerate a bend radius of less than an inch (2.5 cm). [After FAA]- Browse Related Terms: angular misalignment loss, extrinsic joint loss, macrobend, misalignment loss, optical attenuator, optical power budget, optical power margin, overfill, substitution method
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- In an optical fiber, that loss attributable to macrobending. Synonym curvature loss.
- Browse Related Terms: all-glass fiber, macrobend loss, polarization-preserving (PP) optical fiber, polymer-clad silica fiber, Raman amplifier, vitreous silica, W-profile fiber
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Synonym cookie.
- Browse Related Terms: back door, coherent bundle, flow diagram, flywheeling, magic cookie, news client, passive element, plunger, radiant exitance, Scene, scream, set-top box, sexadecimal, spacing pulse, spacing signal, switchpoint, telephone sidetone, WRU signal
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A card with a magnetizable surface on which data can be stored and retrieved.
- Browse Related Terms: computer conference, magnetic card, magnetic drum, Post, posting, record communication, Storage, video recorder (VCR)
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The complete closed path taken by magnetic flux. 2. A region of ferromagnetic material, such as the core of a transformer or solenoid, that contains essentially all of the magnetic flux.
- Browse Related Terms: absorption loss, acoustics, acousto-optic effect, acousto-optics, anisotropic, magnetic circuit, magnetic tape, optically active material, photoconductive effect
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In computer technology, a storage device that uses ferromagnetic materials such as iron, iron oxide, or ferrite and in such shapes as wires, toroids, and rods.
- Browse Related Terms: absolute address, addressability, cache memory, computer program origin, fractal, magnetic core storage, main storage, memory, multiprocessor, processing unit, resident, spooling, virtual storage
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See diskette, hard disk.
- Browse Related Terms: automatic reload, auxiliary storage, bootstrap, compact disk read-only memory, firmware, flash card, magnetic disk, programmable read-only memory (PROM), PROM, RAM, random access memory (RAM), read-only memory (ROM), record information, Resource, ROM, Worm
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A right circular cylinder with a magnetizable surface on which digital data can be stored and retrieved.
- Browse Related Terms: computer conference, magnetic card, magnetic drum, Post, posting, record communication, Storage, video recorder (VCR)