Direct gap semiconductors are particularly important in optoelectronics because they are much more efficient as light emitters than indirect gap materials ; an electron movnig between two bands need not exchange momentum with phonons in the crystal lattice.

Studies show that under ideal propagation conditions ( simulations ), Direct Sequence Spread Spectrum ( DSSS ) provides the highest throughput for all nodes on a network when used in conjunction with CSMA / CA and the IEEE 802. 11 RTS / CTS exchange under light network load conditions.

Direct Client-to-Client ( DCC ) is an IRC-related sub-protocol enabling peers to interconnect using an IRC server for handshaking in order to exchange files or perform non-relayed chats.

* Direct exchange geothermal heat pump, an advanced energy-efficiency technology

Several Class 37 locomotives were purchased from Ian Riley Engineering, which ceased its spot-hire operations in mid-2004, however these locomotives have now been sold on to Direct Rail Services, in exchange for four Class 33s.

Participants of BECS exchange Direct Entry or DE files at intervals through the day.

Direct inward dialing ( DID ), also called direct dial-in ( DDI ) in Europe and Oceania, is a feature offered by telephone companies for use with their customers ' private branch exchange ( PBX ) systems.

The corresponding service to DID for outgoing calls from a PBX to the central office exchange is called direct outward dialing ( DOD ) or Direct Dial Central Office ( DDCO ).

* Direct Extension Line ( DEL ), normal telephone line connecting home telephone to telephone exchange

* IEC 62056-21: Direct local data exchange ( 3d edition of IEC 61107 ) describes how to use COSEM over a local port ( optical or current loop )

Direct reciprocity and cooperation in a group can be increased by changing the focus and incentives from intra-group competition to larger scale competitions such as between groups or against the general population.

Direct current is produced by sources such as batteries, thermocouples, solar cells, and commutator-type electric machines of the dynamo type.

Direct current may flow in a conductor such as a wire, but can also flow through semiconductors, insulators, or even through a vacuum as in electron or ion beams.

Originally, the names of these APIs all began with Direct, such as Direct3D, DirectDraw, DirectMusic, DirectPlay, DirectSound, and so forth.

The design retains most of the essential features of Mars Direct, but uses multiple medium-lift rocket launchers that are commercially available today ( such as the Ariane V or the Delta rocket ) to launch the crew vehicles, and their propulsion, separately, and mate them in orbit.

Direct tracings of the vibrations of sound-producing objects such as tuning forks had been made by English physician Thomas Young in 1807, but the first known device for recording airborne speech, music and other sounds is the phonautograph, patented in 1857 by French typesetter and inventor Édouard-Léon Scott de Martinville.

He was the driving force behind Mars Direct — a proposal intended to produce significant reductions in the cost and complexity of such a mission.

Speech recognition applications include voice user interfaces such as voice dialing ( e. g., " Call home "), call routing ( e. g., " I would like to make a collect call "), domotic appliance control, search ( e. g., find a podcast where particular words were spoken ), simple data entry ( e. g., entering a credit card number ), preparation of structured documents ( e. g., a radiology report ), speech-to-text processing ( e. g., word processors or emails ), and aircraft ( usually termed Direct Voice Input ).

* Direct election ( such as the Australian Senate )

DBS technology is used for DTH-oriented ( Direct-To-Home ) satellite TV services, such as DirecTV and DISH Network in the United States, Bell TV and Shaw Direct in Canada, Freesat and Sky Digital in the UK, the Republic of Ireland, and New Zealand and DSTV in South Africa.

Direct data come from vital statistics registries that track all births and deaths as well as certain changes in legal status such as marriage, divorce, and migration ( registration of place of residence ).

Direct current is produced by sources such as batteries, thermocouples, solar cells, and commutator-type electric machines of the dynamo type.

Direct current may flow in a conductor such as a wire, but can also flow through semiconductors, insulators, or even through a vacuum as in electron or ion beams.

The numerical solution of the Navier – Stokes equations for turbulent flow is extremely difficult, and due to the significantly different mixing-length scales that are involved in turbulent flow, the stable solution of this requires such a fine mesh resolution that the computational time becomes significantly infeasible for calculation ( see Direct numerical simulation ).

* Direct Current — ( old: Galvanic Current ) or " continuous current "; The continuous flow of electricity through a conductor such as a wire from high to low potential.

Some time later, other clients such as DCTC ( Direct Connect Text Client ) and DC ++ became popular.

Nonetheless, online file sharing persists in various forms such as Bit Torrent and Direct download link.

The group included brands such as Airtours, Aspro, Cresta, Direct Holidays, Escapades, Manos and Panorama in the UK ,* Sunquest Vacations and * ALBA Tours in North America, and Ving, Always, Tjæreborg, Spies, Skibby, MyTravel Tango, Bridge and Saga Solreiser in Scandinavia.

Popular websites began to use digital printing ( such as Direct to Garment or DTG printing ) to allow customers to design their own T-shirts online with no minimum orders.

The long haul services were sold only by internal companies such as First Choice Holidays, Eclipse Direct, Sunsail, Sovereign, Hayes and Jarvis and Unijet.

These controls may be then further augmented by new control media such as head pointing with a Helmet Mounted Sighting System or Direct Voice Input ( DVI ).

Transactional payments have been popular in Asia and Europe but are now being overtaken by other mobile payment methods such as mobile web payments ( WAP ), mobile payment client ( Java ME, Android ...) and Direct Mobile Billing for a number of reasons:

There is also a grey market in the United States for Canadian satellite services such as Bell TV or Shaw Direct.

Direct tributaries of the Mackenzie from the west such as the Liard and Peel Rivers carry runoff from the mountains of the eastern Yukon.

Direct current with a negatively charged electrode ( DCEN ) is often employed when welding steels, nickel, titanium, and other metals.

After Farlington Junction and Portcreek Junction ( between which was the now closed Farlington station ) Portsmouth Direct line trains use the joint L & SWR / LBSCR metals to Portsmouth.

Direct contaminative infection by eggs is probably the most common route in human cases, but accidental ingestion of an infected grain beetle or flea cannot be ruled out.

::- Direct database operations: defining data types, assigning security levels, updating data, querying the database, etc.

::- Direct database operations: defining data types, assigning security levels, updating data, querying the database, etc.

* Direct ingress of manmade liquids ( illegal disposal of pesticides, used oils, etc.

More recently a resurgence of old school hardcore punk has risen from Richmond with such bands as Direct Control, Government Warning, Wasted Time, etc.

Direct mail is sent to customers based on criteria such as age, income, location, profession, buying pattern, etc.

Direct trains on broad gauge, connect to Delhi, Mumbai, Howrah etc.

Some important databases are JSTOR, Project MUSE, Science Online, Science Direct, Springer Link, Edinburgh University Press, ESDU, EMERALD, IEEEXPLORE, Taylor & Francis, Wiley Inter Science, CUP etc.

Direct or indirect relations with Russian social imperialism, based on the start of their business or other information from their business process, are attributed by OAKKE to large Greek businessmen, among them Sokratis Kokkalis, George Bobolas, Panos Germanos, Andreas Vgenopoulos etc.

Direct poisoning of one ’ s food is feared ; it is also believed that a witch can harm a person by bewitching his possessions like nails, hair, hoe, etc.