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
Flight of fancy: MIT autonomous mini-helicopter solves one tough challenge
14 hours ago |
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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 ...
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 ...
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Fermi Telescope Peers Deep into Microquasar (w/ Video)
Nov 27, 2009 |
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(PhysOrg.com) -- NASA's Fermi Gamma-ray Space Telescope has made the first unambiguous detection of high-energy gamma-rays from an enigmatic binary system known as Cygnus X-3. The system pairs a hot, massive ...
Signal fading on radio traffic reports
Nov 27, 2009 |
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(AP) -- For more than 20 years, Mike Nolan was known to radio listeners as the "eye in the sky." He flew over Southern California freeways in his single-engine plane, reporting on the nation's worst traffic.
STPSat-1 successfully completes extended mission
Space & Earth / Space Exploration
Dec 02, 2009 |
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The STPSat-1, built for the Department of Defense (DoD) Space Test Program (STP) and operated by the DoD STP for the first year then transitioned to NRL for the last 16 months, was decommissioned on October ...
Shape shifters: Researchers create new breed of antennas
Dec 01, 2009 |
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Antennas aren't just for listening to the radio anymore. They're used in everything from cell phones to GPS devices. Research from North Carolina State University is revolutionizing the field of antenna design ...
Clinical trials launched for treating most aggressive brain tumor with personalized cell vaccines
Nov 30, 2009 |
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The University of Navarra Hospital (Spain) has launched a series of clinical trials in order to assess the efficacy of an immunotherapy treatment. This approach involves the application of personalised vaccines —produced ...
Manufacturing, reinvented
Dec 01, 2009 |
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(PhysOrg.com) -- European researchers have created the architecture, hardware and software that will enable super-agile distributed corporations capable of reconfiguring themselves on the fly. It promises to make 'made-to-order' ...
North Pole wolf emails locations to researchers
Dec 01, 2009 |
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In July the scientists, one from the United States, the other from Canada, put the satellite collar on Brutus, the leader of his wolf pack, on remote Ellesmere Island, only 600 miles from the North Pole. Their ...
Arts and sciences join to develop greener, more efficient conferences and exhibits
Dec 01, 2009 |
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Santanu Majumdar spent his years as a graphic design graduate student developing a project that might sound counterintuitive for a student of fine arts - a software program made to simplify information gathering at conferences ...
South Africa to treat all HIV-positive babies
Medicine & Health / HIV & AIDS
Dec 01, 2009 |
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(AP) -- South Africa announced ambitious new plans Tuesday for earlier and expanded treatment for HIV-positive babies and pregnant women, a change that could save hundreds of thousands of lives in the nation ...
Maryland Farmer grows plants for green roofs around nation
Dec 02, 2009 |
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It is a crisp fall day on Emory Knoll Farms as John Shepley stops at a raspberry bush, picks a few berries and pops them into his mouth on his walk to the greenhouses.
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