Technology — page 104 of 206

20,531 terms including subtopics (0 terms filed directly here)

Technology terms

Life Jacket The life support storage container for a Brilliant Pebbles singlet. The life jacket contains subsystems that perform power, communications, and…
Life-Cycle Cost (LCC) The total cost to the Government of acquisition and ownership of that system over its useful life.
Life-Cycle Management Process for administering an automated information system or hardware support system over its whole life, with emphasis on strengthening early decisions…
Life-Cycle Model A framework containing the processes, activities, and tasks involved in the development, operation, and support of the system, spanning the life of the…
Lifecycle The records lifecycle is the life span of a record from its creation or receipt to its final disposition.
LIFO Last In, First Out. See also "FIFO". A LIFO is usually called a "stack".
LIFO (last in, first out) The (LIFO) semantics of a stack data structure. Items are removed in the opposite order to which they arrived in the stack, so newer items are always…
ligature Two or more characters that are connected so that they appear as one character, such as joining f and i form the ligature Ã¯Â¬Â.
Light A pane of glass; a window, or a compartment of a window.
Light Detection and Ranging (LIDAR) A precision probing instrument used to measure concentrations of different gasses or particulates in a given amount of atmosphere.
light pen A stylus, usually hand-held, that contains a photodetector or light source, and that allows interaction with a computer through a specially designed…
Light Replicas (LREP) Decoys that, by virtue of shape, closely approximate an RVs signature with little off-load penalty.
light valve Synonym optical switch.
Light-emitting diode (LED) (LED) This very energy efficient lighting technology uses 80 to 90% less energy than conventional lights.
lightguide See optical fiber.
lightness The brightness of an area subjectively judged relative to the brightness of a similarly illuminated area that appears to be white or highly transmitting.
lightning down-conductor In a lightning protection subsystem, the conductor connecting the air terminal or overhead ground wire to the earth electrode subsystem.
lightning protection subsystem All of the components used to protect a facility from the effects of lightning.
Lightweight Directory Access Protocol (LDAP) An industry-standard protocol established by the Internet Engineering Task Force (IETF) that allows users to query and update information in a directory…
Lightweight Directory Services A stand-alone directory service that is designed specifically for use with directory-enabled applications.
lightweight process See thread.
LIMDIS Limited Distribution.
LIMIDIS Limited Distribution. 166
Limited Attack An attack on the U.S. and its allies, which provides a stressing timeline, and is geographically distinct. Not an all-out attack or mass wave.
Limited Defense System (LDS) The development of systems, components, and architectures for a deployable anti-ballistic missile system (as described in section 232(a)(1) of the 1991…
Limited Operational Capability (LOC) A point in time when the first set of sensors and weapons can be employed to provide a limited protection system.
Limited Production The initial production of a system in limited quantity. Part of an acquisition strategy to be used in test and evaluation for verification of design…
limited protection A form of short-term communications security applied to the electromagnetic or acoustic transmission of unclassified information that warrants a degree of…
Limited Test Ban Treaty The bilateral Treaty signed and ratified by the United States and the (former) U.S.S.R.
limited-protection voice equipment Equipment that provides limited security for unclassified voice communications.
limiter A device in which the voltage or some other characteristic of the output signal is automatically prevented from exceeding a specified value.
limiter circuit A circuit of nonlinear elements that restricts the electrical excursion of a variable in accordance with specified criteria.
limiting Any process by which a specified characteristic (usually amplitude) of the output of a device is prevented from exceeding a predetermined value.
limits of interference In radio transmission, the maximum permissible interference as specified in recommendations of the International Special Committee on Radio Interference…
LIN Line Item Number.
Linac A machine that uses electricity to form a stream of fast-moving subatomic particles. This creates high-energy radiation that may be used to treat cancer.
line See Groove
line adapter circuit See four-wire terminating set.
line alarm indication signal (AIS) code The code generated by a regenerator upon loss of input signal or loss of frame.
line balance The degree of electrical similarity of the two conductors of a transmission line.
line buffering Used by a "standard I/O" output stream that flushes its "buffer" after every "newline".
line buildout (LBO) Synonym building out.
line code A code chosen for use within a communications system for transmission purposes.
line conditioning [The] elimination of unintentional signals or noise induced or conducted on a telecommunications or information system signal, power, control, indicator…
line conduction Unintentional signals or noise induced or conducted on a telecommunications or information system signal, power, control, indicator, or other external…
line driver An amplifier used to enhance the transmission reliability of a usually digital intrafacility metallic transmission line, over extended distances, by…
line feed See new line.
line filter balance A network designed to maintain phantom group balance when one side of the group is equipped with a carrier system.
line hit See yyhit.
Line Item (Budget) A specific program end item with its own identity (e.g., B-1B Bomber).
line load control A network-provided service feature that allows selective denial of call origination to certain lines when excessive demands for service are required of a…
line loop See loop.
line loopback A signal used to command the far-end receiver to loopback the received line signal. [T1.107-1988] Synonym [loosely] line loopback signal.
line loopback signal See line loopback.
line noise In a telecommunications link or line facility, interference, from any source, that degrades performance.
line number The number of lines read previous to this one, plus 1. Perl keeps a separate line number for each source or input file it opens.
Line of Sight (LOS) The line from sensor to target necessary for the commencement of the detection, acquisition, track, and identification of a target.
Line Replaceable Unit (LRU) An essential support item removed and replaced at field level to restore end item to an operationally ready condition.
line side The portion of a device that is connected to external, i.e., outside plant, facilities such as trunks, local loops, and channels.
Line Source An array of pollutant sources along a defined path that can be treated in dispersion models as an aggregate uniform release of pollutants along a line.
line spectrum In optics, an emission or absorption spectrum consisting of one or more narrow spectral lines, as opposed to a continuous spectrum.
line speed See modulation rate.
line symbol A symbol for drawing coverage arcs.
line terminating equipment (LTE) Network elements that originate and/or terminate line signals. LTEs can originate, access, modify, or terminate the transport overhead, or can perform any…
line traffic coordinator (LTC) In a DDN switching center, the processor that controls traffic on a line.
line unit network termination (LUNT) The customer side of any digital subscriber line (DSL) that does not terminate on the customer installation (CI). [T1.216-1998]
line verification See busy verification.
line-in-polygon A spatial operation in which arcs in one coverage are overlaid with polygons of another coverage to determine which arcs, or portions of arcs, are…
line-of-sight (LOS) propagation Of an electromagnetic wave, propagation in which the direct ray from the transmitter to the receiver is unobstructed, i.e.
line-rate conversion A translation of standardized, existing video systems (using 525, 625, and 1125 total lines per frame) to proposed systems.
line-route map A map or overlay for signal communications operations that shows the actual routes and types of construction of wire circuits in the field.
line-to-line correlation In facsimile, the correlation of object information from scanning line to scanning line.
linear analog control Synonym linear analog synchronization.
linear analog synchronization Synchronization in which the functional relationships used to obtain synchronization are of simple proportionality. Synonym linear analog control.
linear combiner A diversity combiner in which the combining consists of simple addition of two or more signals.
linear device A device for which the output is, within a given dynamic range, linearly proportional to the input.
linear event See event.
linear feature A geographic feature that can be represented by a line or set of lines. For example, rivers, roads within a pizza delivery area, and electric and…
linear foot A measurement used to calculate space requirements Note: A linear foot measures twelve inches for documents stored on edge. See also filing inch.
linear key In video technology and image processing, a process for the selective overlay of one video image upon another, as through chroma key.
linear measurement A measurement of records on a shelf or in a drawer typically expressed in filing inches or linear feet See also filing inch.
linear network See network topology.
linear optimization Synonym linear programming.
linear polarization Of an electromagnetic wave, confinement of the E-field vector or H-field vector to a given plane.
linear predictive coding (LPC) A method of digitally encoding analog signals, which method uses a single-level or multilevel sampling system in which the value of the signal at each…
linear programming (LP) In operations research, a procedure for locating the maximum or minimum of a linear function of variables that are subject to linear constraints.
linear topology See network topology.
linearity The property of a system in which, if input signals X and Y result in system output S(X) and S(Y) respectively, the input signal aX + bY will result in…
linearly polarized (LP) mode A mode for which the field components in the direction of propagation are small compared to components perpendicular to that direction.
linearly scalable The system will be predictable and efficient in growing the application. If one server can process 1,000 transactions per second, two servers should be…
linewidth See spectral width.
linguistic search A search type that browses, retrieves, and indexes a document with terms that are reduced to their base form (for example, so that "mice" is indexed as…
Linguistics The study of the nature, structure, and variation of language. In advanced enterprise search platforms, linguistics analysis enables transformation of…
link See Hyperlink.
link analysis A method that is based on the analysis of hyperlinks between documents and used to determine what pages in the collection are important to users.
Link bait Useful or entertaining web content which compels users to link to it.
Link Baiting The art of targeting, creating, and formatting information that provokes the target audience to point high quality links at your site.
Link Building The process of building high quality linkage data that search engines will evaluate to trust your website is authoritative, relevant, and trustworthy.
Link Bursts A rapid increase in the quantity of links pointing at a website. When links occur naturally they generally develop over time.
Link cardinality The number of links in a set that refer to a given document. It is best used to determine the relevancy of a Web page by factoring in how many other pages…