beam

(redirected from Beamforming)
Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.

BEAM

 
brain electric activity map; trademark name for a map of brainwave activity derived from a computerized enhancement of electroencephalographic records.

beam

 [bēm]
a unidirectional, or approximately unidirectional, emission of electromagnetic radiation or particles.
useful beam in radiology, that part of the primary radiation that is permitted to emerge from the tubehead assembly of an x-ray machine, as limited by the aperture or port and accessory collimating devices.
beam splitter a device that reflects light from the output phosphor of an image intensifier to a photographic recording. Called also image distributor.

beam

(bēm),
1. Any bar the curvature of which changes under load; in dentistry, frequently used instead of "bar."
2. A collimated emission of light or other radiation, such as an x-ray beam.
[O.H.G. Boum]

beam

Etymology: ME, beem, tree
1 a bedframe fitting for pulleys and weights, used in the treatment of patients requiring weight traction. See Balkan traction frame.
2 (in radiology) the primary beam of radiation emitted from the x-ray tube.

BEAM

[bēm, bē′ē′ā′em′]
abbreviation for brain electric activity map.

beam

Drug slang
A regional synonym for cocaine.
 
Radiation oncology
A focused stream of particles or electromagnetic radiation which is focused in a single direction or body region as part of a therapeutic regimen.

BEAM

Abbreviation for:
BCNU, etoposide, cytarabine, melphalan (a chemotherapy regimen)
Biomedical Equipment Assessment & Management (Medspeak-UK)
brain electrical activity mapping

beam

(bēm)
1. Any bar with a curvature that changes under load.
2. dentistry Synonym(s): bar (2) .
3. A collimated emission of light or other radiation, such as an x-ray beam.
[O.H.G. Boum]

beam

(bēm)
1. Any bar the curvature of which changes under load; in dentistry, frequently used instead of "bar."
2. A collimated emission of light or other radiation.
[O.H.G. Boum]

beam,

n a stream or approximately unidirectional emission of electromagnetic radiation or particles.
beam, central,
n the center of the beam of roentgen rays emitted from the tube.
beam, useful,
n the part of the primary radiation that passes through the aperture, cone, or other collimator.

beam

a unidirectional emission of electromagnetic radiation. See also x-ray.

external beam therapy
radiotherapy in which the source is at a distance from the patient, e.g. orthovoltage, cesium-137, cobalt-60 or linear accelerator.
beam limitation
restriction of the divergent beam as it appears from the tube window by a lead plate or cone or a light beam diaphragm located at the window.
primary beam
the radiation beam as it passes through the window of the x-ray tube and before it is modified by extra-tube devices.
References in periodicals archive ?
Navini leads the Beamforming task group, part of the Certification Working Group in the WiMAX Forum.
The trial of our MBW access points in Tokyo's highly interfered areas highlights the need for smart antenna beamforming solutions in such challenging environments.
Beamforming : Beamforming, a specialized method of radio-frequency transmission that can be integrated across a range of devices from access points to laptops and smartphones, greatly improves link robustness and wireless performance, enabling, for instance, the seamless streaming of HD video in locations where devices could previously maintain only minimal connection to the network.
BARCELONA, Spain -- GoNet Systems, a provider of carrier-grade Wi-Fi solutions for cellular operators and service providers, announced today the launch of its GoBeam MIMO xRF Beamforming Access Points in Mobile World Congress 2012.
Cephasonics' technology, including its AutoFocus(TM) beamforming technology, has won multiple industry awards for innovation.
Navini's Ripwave base stations combine the coverage and capacity benefits of beamforming with the robustness and throughput enhancements of MIMO.
Spirent Communications, a leader in testing wireless networks, services and devices, today announced that several leading companies and government research organizations in the Asia Pacific region are using the Spirent VR5 HD Spatial Channel Emulator to test implementations of advanced MIMO beamforming.
Innovative beamforming technology provides RF channel data access in real-time, without the need for additional hardware
Beceem has seen the value of Beamforming and MIMO-based Smart Antenna technologies for some time," says Lars Johansson, VP Marketing for Beceem, "Working with Navini, an established leader in Mobile WiMAX technology and chair of the beamforming task group in the WiMAX Forum, will allow us to extend our market leadership and work with a partner that is committed to bring Wave 2 802.
Wavion's unique and powerful base stations, with their spatially adaptive two-way Beamforming and powerful interference immunity suite, provide extended coverage and higher throughput in outdoor environments, excelling in NLOS (non line of sight) conditions and heavy interference.
SALT LAKE CITY, July 31, 2014 /PRNewswire/ -- ClearOne (NASDAQ: CLRO) has been named by TMCnet(TM) as the recipient of the 2014 Communications Product of the Year Award for its revolutionary Beamforming Microphone Array.
The Surfer 2000 devices will be Wave 1 certified and the Surfer 3000 devices will be Wave 2 certified with support for Beamforming and MIMO.