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Tuesday Feb 7, 2012
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R

WordExplanation
R U THERE?
Are you there?
R-UIM: Removable User Identity Module
Removable User Identity Module (R-UIM), also known as UIM, is similar to a Subscriber Identity Module (SIM), but is designed for networks other than GSM such as CDMA. R-UIM cards support roaming between CDMA and GSM networks.
R:BASE
A relational DBMS from Microrim, Inc., Bellevue, Washington.
RAB: Reverse-Link Activity Bit
Reverse-Link Activity Bit (RAB) is for determining the data rate of a reverse link communication of a mobile communication system. A processor in the access terminal may determine whether the access terminal is in an idle mode, and passing a non-busy state value of the RAB to the digital filter when the access terminal is in the idle mode. The RAB may be compared to a threshold to determine a mode of reverse link data rate determination. The mode defines a set of criteria for an aggressiveness level of increasing or decreasing the reverse link communication data rate. The processor, therefore, determines the data rate based on the filtered reverse activity bit in accordance with the determined mode.
RACE:Research in Advanced Communications
Research in Advanced Communications Equipment (RACE) is an ETSI research project that has subsequently been replaced by ACTS.
RACF
Resource Access Control Facility. A large system security program for IBM mainframes that checks passwords and prevents unauthorized users from accessing files.
RACH: Random Access Channel
Random Access Channel (RACH) is the channel used by mobiles in GSM and W-CDMA systems to gain access to the system when first attaching to it.
rack
A frame or cabinet for mounting computer components.
rack mounted
Built to fit into a metal rack. Some computer components are rack mounted units.
RAD
Rapid Application Development. A way of developing a system by completing a working part, implementing it, and adding more working parts every few months, instead of waiting to finish the entire project before putting the system into use. Otherwise, changes take place so fast in the computer industry that an application can be obsolete by the time it is implemented. Development tools such as visual programming and computer-assisted software engineering help with Rapid Application Development.
RAD tool
Rapid Application Development tool. Software that speeds up the development of applications.
radio
Wireless transmission of electric signals by way of electromagnetic waves, including the use of electromagnetic waves to transmit electric impulses that carry converted sound signals.
Radio
Radio is the electromagnetic waves whose frequencies are below 3,000 GHz as defined in Article 2 of the Radio Law in general. However, in practice, radio is generally refered to as electromagnetic waves whose frequencies are between 10 kHz and 300 GHz.
radio buttons
A group of buttons on the computer screen of which only one can be selected at a time (by clicking on it). Radio buttons are used a lot with interactive forms on World Wide Web pages.
radio frequency
(RF). Electromagnetic frequencies in the range extending from below 3 kiloherz to 300 gigahertz, which includes radio and television transmission. These frequencies are above audio signals and below the frequencies of visible light.
radio frequency interference
(RFI). Interference from high-frequency electromagnetic waves emanating from electronic devices.
Radio link
Radio link refers to the equipment and transmission path (propagation channel) used to carry on communications. It includes the transmitting system, the propagation channel and receiving system.
Radio port
Radio port is a unit that supports transmission of signals over the air interface.
Radio propagation
Radio propagation refers to the electromagnetic waves at radio frequencies as they radiate from a transmitting antenna.
radio-frequency fingerprinting
An electronic fingerprint that makes it possible to identify a wireless handset by its unique radio transmission characteristics.
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