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
Dec 08, 2009 |
4.1 / 5 (17) |
13
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) |
2
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 ...
Fermi sees brightest-ever blazar flare
Dec 09, 2009 |
4.4 / 5 (10) |
3
(PhysOrg.com) -- A galaxy located billions of light-years away is commanding the attention of NASA's Fermi Gamma-ray Space Telescope and astronomers around the globe. Thanks to a series of flares that began ...
ET: Check your voicemail
Space & Earth / Space Exploration
Nov 24, 2009 |
3.9 / 5 (7) |
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.
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 ...
Researcher develops formula that can ID music industry payola
Dec 15, 2009 |
4 / 5 (1) |
0
A University at Buffalo researcher has invented a statistical method that can detect payola-like corruption in the music industry, a system that gives law enforcement an inexpensive statistical guide to identify potential ...
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.
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 ...
New species of coral, sponges found near Hawaii
Dec 15, 2009 |
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(AP) -- New and dramatic species of coral and sponges have been found in the Pacific during deep sea dives near the Northwestern Hawaiian Islands, scientists said Monday.
Google adds new media partners to 'Fast Flip'
Dec 17, 2009 |
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Internet giant Google on Wednesday added another 24 media partners to its online news reader "Fast Flip," including the Tribune and McClatchy newspaper groups, the Huffington Post and Politico.
Samsung Launches M5650 Music Phone
Electronics / Consumer & Gadgets
18 hours ago |
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0
Samsung Electronics today unveiled the Samsung M5650, a music-focused addition to its popular lineup of full touch screen handsets for young mobile users.
Stern's threat to quit Sirius could be empty talk
16 hours ago |
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(AP) --Howard Stern is threatening to leave Sirius XM Radio Inc. now that the shock jock and the satellite radio provider are getting set to enter contract talks in 2010.
