ExpertGlossary terms starting with D

2,757 terms

Dansgaard-Oeschger event one of a series of climate changes during the last glacial period that occurred roughly every few thousand years.
DAPM In hydrologic terms, the Data Acquisition Program Manager.
dapping A method of fly-fishing in which the fly is allowed to skip or dance on the water while line and leader are held above the water from a high rod.
DAPR Directors Annual Program Review (SDIO term)
daptomycin (dap-toh-MY-sin) A drug used to treat certain bacterial skin and bloodstream infections in adults.
DAR Direct Access Restore. A process by which select data is restored from an NDMP tape backup device to the filer.
Dar por terminada la presentación de las pruebas Una de las partes en un juicio da por terminada la producción de sus pruebas cuando no tiene ninguna otras pruebas que ofrecer.
darbepoetin alfa (dar-be-POE-e-tin AL-fa) A substance made in the laboratory that stimulates the bone marrow to produce red blood cells.
Dardevle A trademark for a brand of spoons typically used for trout and northern pike fishing.
dark current The external current that, under specified biasing conditions, flows in a photoconductive detector when there is no incident radiation.
Dark Energy An energy causing the acceleration of the expansion of the universe, detectable through its gravitational effects.
Dark Matter Matter not visible to us because it emits no radiation that we can observe, but it is detectable gravitationally. A small fraction of it is baryonic, e.g.
Dark Surge on Disk (DSD) In solar-terrestrial terms, dark gaseous ejections visible in H-alpha.
dark-field microscope A microscope (device used to magnify small objects) in which objects are lit at a very low angle from the side so that the background appears dark and the…
DARO Defense Aeronautical Reconnaissance Office (OSD).
DARP Defense Aeronautical Reconnaissance Program.
DARPA Defense Advanced Research Projects Agency. See ARPA.
Darrius (Wind) Machine A type of vertical-axis wind machine that has long, thin blades in the shape of loops connected to the top and bottom of the axle; often called an…
DART OBSOLETE. Defense Acquisition Review Team.
Dart Leader A faint, negatively charged channel that travels more or less directly and continuously from cloud to ground.
Darwinian cloning Selection of a clone from a large number of essentially random starting points, rather than isolating a natural gene or making a carefully designed…
DAS (Direct Attached Storage) "Direct Attached Storage" a digital storage system directlyattached to a server or workstation without a storage network inbetween.
DASA German Aerospace. Member of the MEADS Program Team.
dasatinib (da-SA-tih-nib) A drug used to treat certain types of chronic myeloid leukemia and acute lymphoblastic leukemia.
DASC Deep Air Support Center (JFACC term).
DASD OBSOLETE. Deputy Assistant Secretary of Defense.
DASD (C3) Deputy /Assistant Secretary of Defense (C3).
DASD (Direct-Access Storage Device) generic nomenclature for a storage peripheral that can respond directly to random requests for information; usually denotes a disk drive.
dashboard See definition for: digital dashboard
dashboard site A Web site created by using Digital Dashboard technology. The dashboard site contains a number of pages, or dashboards, and includes customization pages…
DASL See definition for: Distributed Authoring Search and Location (DASL)
DASO Demonstration and Shakedown Operation.
DAT An acronym for Digital Audio Tape, which some backup systems utilize as a storage medium.
DAT (Digital Audio Tape) A magnetic tape generally used to record audio but can hold up to 40 gigabytes (or 60 CDs) of data if used for data storage.
data A representation of facts, concepts, or instructions in a formalized manner suitable for communication, interpretation, or processing by humans or by…
data access arrangement In public switched telephone networks, a single item or group of items at the customer side of the network interface for data transmission purposes…
Data Access Language (DAL) Apple's former standard to allow applications to communicate with relational databases. DAL is middleware on a network.
data access security Measures taken to control system users' ability to view or modify data. These measures can include logical views of data and explicit access rights by…
data administration Developing and administering policies, procedures, practices, and plans for defining, organizing, protecting and efficiently utilizing data.
data aggregation [In security,] the compilation of unclassified individual data systems and data elements resulting in the totality of the information being classified.
Data and Format Conversion Includes rebuilding PSTs and other e-mail formats as well as voice and video conversion.
Data and Safety Monitoring Board An impartial group that oversees a clinical trial and reviews the results to see if they are acceptable.
Data Archive Serves as long-term storage for ARM data to keep data easily accessible. It is located at Oak Ridge National Laboratory.
data archiving a process of transferring information from on-line storage devices such as fixed magnetic disk drives to off-line storage media such as magnetic tape or…
data attribute A characteristic of a data element such as length, value, or method of representation.
data authentication A process used to verify data integrity, e.g., verification that data received are identical to data sent, or verification that a program is not infected…
data bank A set of data related to a given subject and organized in such a way that it can be consulted by users. 2.
data base The information and/or data physically stored in a record center or electronically stored in machine form; implies a system that permits access to and…
Data Base Management System (DBMS) Software that manages, manipulates and retrieves data in a database.
data base node (DBN) A signaling point that acts as a repository of information and provides query/response services for processing and routing of certain types of network…
data burst Synonym burst transmission.
data bus A bus used to transfer data within or to and from a processing unit or storage device.
data center A facility that provides a suitable environment (power, cooling, network connectivity, management services) for housing information technology equipment…
data channel Communication link(s) over which the actual data of interest flows. High Bandwidth; authenticated by default; encryption and integrity protection optional.
data circuit connection The interconnection of any combination of links and trunks, on a tandem basis, by means of switching equipment to facilitate information interchange.
data circuit-terminating equipment See DCE.
Data Collection See Harvesting.
data collection facility A facility for gathering and organizing data from a group of sources.
Data collection platform Electronic equipment device that gathers digital and analog data from monitoring devices and remotely relays that data to a central computer for…
Data Collection Platform (DCP) An electronic device that connects to a river or rainfall gage that records data from the gage and at pre-determined times transmits that data through a…
data collection processor A communications device, serving as mediation equipment in the telecommunication management network, that provides concentration, protocol conversion, and…
data collector An object that defines what data will be collected from a provider (such as a counter provider or event provider).
data collector set A group of data collectors stored as a single object.
data communication The transfer of information between functional units by means of data transmission according to a protocol.
data communication control procedure A means used to control the orderly communication of information among stations in a data communication network.
data communication network (DCN) A configuration of telecommunication facilities for the purpose of transmitting data, as opposed to analog signals. [After T1.210-1989]
data communications control character See control character.
data communications equipment Deprecated term. See DCE.
data compaction The reduction of the number of data elements, bandwidth, cost, and time for the generation, transmission, and storage of data without loss of information…
data composite A collection of data elements treated as a unit. [T1.238-1994/97] [T1.266-2000]
data compression Increasing the amount of data that can be stored in a given domain, such as space, time, or frequency, or contained in a given message length. 2.
data concentrator A functional unit that permits a common transmission medium to serve more data sources than there are channels currently available within the transmission…
data conferencing repeater A device that enables any one user of a group of users to transmit a message to all other users in that group. Synonym technical control hubbing repeater.
data consistency Whether data are logically correct and immediately usable; the validity of the data after the last write.
data contamination Synonym data corruption.
data conversion The translation of data from one format to another. ARC/INFO supports data conversion from many geographic data formats such as DLG, TIGER, DXF, and DEM.
data corruption An accidental or intentional violation of data integrity. [2382-pt.8]
data country code A 3-digit numerical country identifier that is part of the 14-digit network terminal numbering plan.
data currency Whether the data contain the most recent transactions, and/or whether the replica database has all of the committed transactions that the primary database…
data definition The process of creating a complete description of the structure of a database by identifying and describing data elements and their relationships that…
Data definition language (DDL) SQL statements that can be used either interactively or within programming language source code to define databases and their components.
data description language (DDL) Synonym data definition language.
data dictionary A catalog of all data held in a database, or a list of items giving data names and structures. Also referred to as DD/D for data dictionary/directory.
data directory a directory that contains local applications, local templates, country language services (CLUs) files, DESKTOP.
Data Element A combination of characters or bytes referring to one separate piece of information, such as name, address, or age.
Data Element Dictionary (DED) The Data Element Dictionary (DED) is a table in which the data element that you are searching for is located.
Data Encryption Algorithm (DEA) The cryptographic engine that is used by the Triple Data Encryption Algorithm (TDEA).
Data Encryption Standard (DES) A U.S. Government-approved, symmetric cipher, encryption algorithm used by business and civilian government agencies.
Data Exchange Format (DXF) A format for storing vector data in ASCII or binary files. Used by AutoCAD and other CAD software for data interchange.
Data Extraction The process of retrieving data from documents (hard copy or electronic). The process may be manual or electronic.
Data Field See Field.
data file 1) A collection of data that is stored together and treated as a unit by a computer.
Data Filtering The process of identifying for extraction specific data based on specified parameters.
data flow control Synonym information flow control.
Data Formats The organization of information for display, storage or printing. Data is maintained in certain common formats so that it can be used by various programs…
data forwarder A device that (a) receives data from one data link and retransmits data representing the same information, using proper format and link protocols, to…
data frame A presentation unit of the data channel; a defined group of consecutive data bits.
Data Harvesting See Harvesting.
Data Integrity The state that exists when computerized data is the same as that in the source documents and has not been exposed to accidental or malicious alteration or…
data item A named component of a data element; usually the smallest component. 2. A subunit of descriptive information or value classified under a data element.