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  • 161 General Packet Radio Service — (GPRS) is a packet oriented mobile data service on the 2G and 3G cellular communication system s global system for mobile communications (GSM). GPRS was originally standardized by European Telecommunications Standards Institute (ETSI) in response …

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  • 162 Time division multiple access — This article is about the channel access method. The name TDMA is also commonly used in the United States to refer to Digital AMPS, which is an obsolete mobile telephone standard that uses TDMA to control channel access. Time division multiple… …

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  • 163 Shannon–Hartley theorem — In information theory, the Shannon–Hartley theorem tells the maximum rate at which information can be transmitted over a communications channel of a specified bandwidth in the presence of noise. It is an application of the noisy channel coding… …

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  • 164 Parity bit — 7 bits of data (number of 1s) 8 bits including parity even odd 0000000 (0) 00000000 10000000 1010001 (3) 11010001 01010001 1101001 (4) 01101001 11101001 1111111 (7) 11111111 …

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  • 165 Johann Philipp Reis — (January 7, 1834 ndash; January 14, 1874) was a self taught German scientist and inventor who in 1860 1 constructed an early telephone, today called the Reis telephone. He first publicly demonstrated it on October 26 1861.Early life and… …

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  • 166 4G — (also known as Beyond 3G), an abbreviation for Fourth Generation, is a term used to describe the next complete evolution in wireless communications . A 4G system will be able to provide a comprehensive IP solution where voice, data and streamed… …

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  • 167 Anopheles — Taxobox name = Anopheles image width = 300px image caption = Anopheles stephensi regnum = Animalia phylum = Arthropoda subphylum = Hexapoda classis = Insecta subclassis = Pterygota infraclassis = Neoptera superordo = Endopterygota| ordo = Diptera …

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  • 168 Current loop — This article is about the electrical signaling schemes. For the oceanic phenomenon, see Loop current. A current loop describes two different electrical signalling schemes. Contents 1 Digital 2 Analog 3 Process control use …

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  • 169 Belt (mechanical) — For other belts, see Belt (disambiguation). A pair of vee belts …

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  • 170 TCP congestion avoidance algorithm — The TCP uses a network congestion avoidance algorithm that includes various aspects of an additive increase multiplicative decrease (AIMD) scheme, with other schemes such as slow start in order to achieve congestion avoidance. TCP Tahoe and Reno… …

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  • 171 Aircraft Communication Addressing and Reporting System — Aircraft Communications Addressing and Reporting System (or ACARS) is a digital datalink system for transmission of small messages between aircraft and ground stations via radio or satellite. The protocol, which was designed by ARINC to replace… …

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  • 172 Medium dependent interface — Hub with three MDIX ports and one switchable port circa 1998 A medium dependent interface (MDI) describes the interface (both physical and electrical) in a computer network from a physical layer implementation to the physical medium used to carry …

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  • 173 Friis transmission equation — The Friis transmission equation is used in telecommunications engineering, and gives the power received by one antenna under idealized conditions given another antenna some distance away tramitting a known amount of power. The formula was derived …

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  • 174 High-speed multimedia radio — (HSMM), colloquially referred to as the hinternet , is the implementation of wireless data networks over amateur radio frequencies using commercial off the shelf (COTS) hardware such as 802.11 access points and D Star equipment. Licensed amateur… …

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  • 175 Channel state information — In wireless communications, channel state information (CSI) refers to known channel properties of a communication link. This information describes how a signal propagates from the transmitter to the receiver and represents the combined effect of …

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  • 176 RCTV — Infobox Network network name = Radio Caracas Televisión Internacional name = network network type = Cable television network Defunct broadcast television network branding = RCTV Internacional airdate = November 15, 1953 (as an over the air… …

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  • 177 Yaesu VX-7R — The Yaesu VX 7R is a quad band 50 MHz (6 meters), 220 MHz (1.25 meters), 144 MHz (2 meters) 440 MHz (70 centimeters) handheld amateur radio transceiver with extensive receive coverage, and leading edge features.The radio s magnesium alloy case is …

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  • 178 Microwave transmission — The atmospheric attenuation of microwaves in dry air with a precipitable water vapor level of 0.001 mm. The downward spikes in the graph correspond to frequencies at which microwaves are absorbed more strongly, such as by oxygen molecules… …

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  • 179 Idler-wheel — An idler wheel drive is a system used to transmit the rotation of the main shaft of a motor to another rotating device. For example the platter of a record reproducing turntable or the crankshaft to camshaft gear train of an automobile.An idler… …

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  • 180 RF MEMS — The MEMS acronym stands for Micro Electromechanical System and is used to refer to components of which sub millimeter sized parts need to move for the components to have electronic functionality. RF MEMS passives, such as capacitors, inductors,… …

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