Radio
hideRadio is the transmission of signals by modulation of electromagnetic waves with frequencies below those of visible light. Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass through the air and the vacuum of space. Information is carried by systematically changing (modulating) some property of the radiated waves, such as amplitude, frequency, or phase. When radio waves pass an electrical conductor, the oscillating fields induce an alternating current in the conductor. This can be detected and transformed into sound or other signals that carry information.
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News tagged with radio
Absence of evidence for a meteorite impact event 13,000 years ago
Space & Earth / Earth Sciences
17 hours ago |
4.4 / 5 (8) |
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An international team of scientists led by researchers at the University of Hawaii at Manoa have found no evidence supporting an extraterrestrial impact event at the onset of the Younger Dryas ~13000 years ...
Flight of fancy: MIT autonomous mini-helicopter solves one tough challenge
Dec 03, 2009 |
4.6 / 5 (13) |
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In its first 18 years, the Association for Unmanned Vehicle Systems International’s annual aerial-robotics competition posed four successive challenges, which robotics researchers had to meet using entirely ...
Gadgets: Gift ideas for your holiday shopping
Electronics / Consumer & Gadgets
Dec 05, 2009 |
3 / 5 (1) |
1
Black Friday has come and gone and if you're like me, you barely made a dent in your holiday shopping list.
Close-up movie shows hidden details in the birth of super-suns (w/ Video)
Nov 16, 2009 |
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(PhysOrg.com) -- The constellation of Orion is a hotbed of massive star formation, most prominently in the Great Nebula that sits in Orion's sword. The glowing gas of the Nebula is powered by a group of young ...
ET: Check your voicemail
Space & Earth / Space Exploration
Nov 24, 2009 |
3.7 / 5 (6) |
7
(PhysOrg.com) -- Alien beings on faraway planets may not have noticed, but it’s been 35 years since human beings made the first deliberate effort to send them a message.
Intelligent blood bags
Dec 01, 2009 |
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(PhysOrg.com) -- Have the blood supplies got too warm? Do they match the patient?s blood group? In the future, these kinds of questions will be answered by intelligent radio nodes attached to blood bags. These ...
'Fingerprinting' RFID Tags: Researchers Develop Anti-Counterfeiting Technology
Nov 19, 2009 |
4 / 5 (3) |
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(PhysOrg.com) -- Engineering researchers at the University of Arkansas have developed a unique and robust method to prevent cloning of passive radio frequency identification tags. The technology, based on one or more unique ...
Intelligence inside metal components
Nov 24, 2009 |
4.5 / 5 (2) |
3
Up to now, extreme production temperatures made it impossible to equip metallic components with RFID chips during the operating process. At Euromold in Frankfurt (Dec. 2-5), Germany, Fraunhofer researchers ...
Building the smart home wirelessly
Nov 19, 2009 |
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Like the paperless office, the smart home has been a long time coming, but a report published in the International Journal of Internet Protocol Technology, suggests that radio tags coupled with mobile communications device ...
Microwave Meter Measures Moisture and Density of In-Shell Peanuts
Nov 20, 2009 |
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(PhysOrg.com) -- A microwave meter that instantaneously measures both moisture and density of in-shell peanuts has been developed by Agricultural Research Service (ARS) scientists, making it easier and faster ...
Record-Breaking Radio Astronomy Project to Measure Sky with Extreme Precision
Nov 16, 2009 |
4.8 / 5 (5) |
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(PhysOrg.com) -- Astronomers will tie together the largest collection of the world's radio telescopes ever assembled to work as a single observing tool in a project aimed at improving the precision of the ...
NICTA demonstrates new interference-cancellation modem for 3G femtocell networks
Nov 10, 2009 |
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(PhysOrg.com) -- NICTA, Australia’s Information and Communications Technology (ICT) Research Centre of Excellence, has successfully demonstrated technology that reduces the amount of radio interference in 3G networks with ...
