EFBEnvironmental Fault Bus. A storage shelf component that is used to note disk and shelf events, including disk insertion or removal, fan faults, and power…
Effective 2-WireThe term "Effective 2-Wire" denotes a condition which permits the simultaneous transmission in both directions over a channel, but it is not possible to…
Effective 4-WireThe term "Effective 4-Wire" denotes a condition which permits the simultaneous independent transmission of information in both directions over a channel.
Effective DamageThat damage necessary to render a target element inoperative, unserviceable, nonproductive, or uninhabitable.
effective data transfer rateThe average number of units of data, such as bits, characters, blocks, or frames, transferred per unit time from a source and accepted as valid by a sink.
Effective DateThe date on which an insurance policy becomes effective.
effective Earth radiusThe radius of a hypothetical Earth for which the distance to the radio horizon, assuming rectilinear propagation, is the same as that for the actual Earth…
effective heightThe height of the center of radiation of an antenna above the effective ground level. 2.
effective input noise temperatureThe source noise temperature in a two-port network or amplifier that will result in the same output noise power, when connected to a noise-free network or…
effective mode volumeFor an optical fiber, the square of the product of the diameter of the near-field pattern and the sine of the radiation angle of the far-field pattern.
effective transmission rateThe rate at which information is processed by a transmission facility. Note 1: The effective transmission rate is calculated as (a) the measured number of…
effective userThe user under whose authority an agent runs. The effective user name will be used for ACL access rights; rights to create databases, replicas, and…
EffectivenessA property of a Target of Evaluation representing how well it provides security in the context of its actual or proposed operational use [ITSEC].
EffectivityA designation given to the BMDS configuration and demonstrated capability at a point in time, becoming effective at each increment when an element or…
efficiency factorIn data communications, the ratio of (a) the time to transmit a text automatically at a specified modulation rate to (b) the time actually required to…
Effluent PlumeThe pathway of movement of effluents through surface water or air.
EFIA type of interface between a computer, firmware, hardware, and the operating system. EFI defines a new partition style called GUID partition table (GPT).
EGA (Enterprise Grid Alliance)The Enterprise Grid Alliance is a consortium of leading vendors and customers focused on developing Enterprise Grid solutions.
Egress FilteringThe process of blocking outgoing packets that use obviously false Internet Protocol (IP) addresses, such as source addresses from internal networks.
EIA interfaceAny of a number of equipment interfaces compliant with voluntary industry standards developed by the Electronic Industries Association (EIA) to define…
Eight Ingredient FrameworkA systematic and comprehensive framework that a) consists of the ingredients that make up communications infrastructure, b) includes all of these…
eight-hundred (800) serviceA service that allows call originators to place toll telephone calls to 800-service subscribers, from within specified rate areas, without a charge to the…
EJB contextAn object that allows an enterprise bean to invoke services provided by the container and to obtain the information about the caller of a client-invoked…
EJB home objectAn object that provides the life-cycle operations (create, remove, find) for an enterprise bean.
EJB JAR fileA JAR archive that contains an EJB module.
EJB moduleA deployable unit that consists of one or more enterprise beans and an EJB deployment descriptor.
EJB objectAn object whose class implements the enterprise bean's remote interface. A client never references an enterprise bean instance directly; a client always…
EJB serverSoftware that provides services to an EJB container. For example, an EJB container typically relies on a transaction manager that is part of the EJB…
Elastic Block Store (EBS)(EBS)Offers block level storage volumes for EC2 users. With Amazon EBS, users can decrease the risk of running into component failures as its feature…
elastic buffer1. A buffer that has an adjustable capacity for data. 2. A buffer that introduces an adjustable delay of signals.
Elastic Compute Cloud (EC2)(EC2)A web service that is central to Amazon’s cloud computing platform. It allows users to ‘rent’ from its resizable computing capacity and possibly…
elastic IP addressA fixed (static) IP address that you have allocated in Amazon EC2 or Amazon VPC and then attached to an instance.
Elastic Load BalancingA web service that improves an application's availability by distributing incoming traffic between two or more EC2 instances. See Also http://aws.amazon.
Elastic MapReduce (EMR)(EMR)Allows any AWS user to process large amounts of data using a hosted Hadoop framework. This feature runs on the EC2 and S3 infrastructure.
elastic network interfaceAn additional network interface that can be attached to an instance. ENIs include a primary private IP address, one or more secondary private IP…
Elastic RangeThe stress range in which a material will recover its original form when the force (or loading) is removed.
ElastiCacheProvides in-memory caching for web applications. Users can use this feature to retrieve information from in-memory caches faster than getting information…
electric fieldThe effect produced by the existence of an electric charge, such as an electron, ion, or proton, in the volume of space or medium that surrounds it.
electrical lengthOf a transmission medium, its length expressed as a multiple or submultiple of the wavelength of a periodic electromagnetic or electrical signal…
electrically powered telephoneA telephone in which the operating power is obtained either from a battery located at the telephone, i.e.
electro-optic effectAny one of a number of phenomena that occur when an electromagnetic wave in the optical spectrum interacts with an electric field, or with matter under…
electro-optic modulatorAn optical device in which a signal-controlled element is used to modulate a beam of light.
electro-optical intelligence (ELECTRO-OPTINT)Intelligence information other than signals intelligence derived from the optical monitoring of the electromagnetic spectrum from ultraviolet (0.
electro-opticsThe technology associated with those components, devices and systems which are designed to interact between the electromagnetic (optical) and the electric…
Electro-Optics Infrared (EO/IR)Technologies/techniques employed by optical sensors in the wavelength spectrum slightly longer than visible but shorter than radio. 92
electrochemical recordingFacsimile recording by means of a chemical reaction brought about by the passage of a signal-controlled current through the sensitized portion of the…
electroluminescenceNonthermal conversion of electrical energy into light. Note 1: Electroluminescence is distinguished from incandescence, which is a thermal process.
electrolytic recordingElectrochemical facsimile recording in which the recorded copy is made by the passage of a signal-controlled current through an electrolyte which causes…
Electromagnetic Compatibility (EMC)A condition when all electromagnetic emissions from electronic, electro-magnetic, and electro-optical components of a system interact without interfering…
Electromagnetic EmanationsSignals transmitted as radiation through the air, through a vacuum, or through conductors.
electromagnetic emission controlThe control of friendly electromagnetic emissions, such as radio and radar transmissions, for the purpose of preventing or minimizing their use by…
electromagnetic environment (EME)For a telecommunications system, the spatial distribution of electromagnetic fields surrounding a given site.
Electromagnetic Field (EMF)(EMF)The electrical and magnetic fields created by the presence or flow of electricity in an electrical conductor or electricity consuming appliance or motor.
Electromagnetic Gun (EMG)A gun in which the projectile is accelerated by electromagnetic forces rather than by an explosion, as in a conventional gun.