News tagged with radio
Distorting the lens
(PhysOrg.com) -- One of the most bizarre predictions of Einstein's Theory of General Relativity is the existence of back holes, objects that are so dense that not even light can escape from their gravitational ...
Feb 09, 2012 |
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Guilty verdict in theft of Motorola secrets for China
A former software engineer for Motorola was found guilty Wednesday of stealing trade secrets from the US technology firm just before she tried to leave the country for China, the Justice Department said.
Feb 08, 2012 |
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Playing RFID tag with sheets of paper
Radio Frequency Identification (RFID) tags are an essential component of modern shopping, logistics, warehouse, and stock control for toll roads, casino chips and much more. They provide a simple way to track the item to ...
Feb 06, 2012 |
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A boom in smarter baby monitors
The cry has been heard: After 20 years with little change to baby monitoring devices, new designs premiered in January at the Consumer Electronics Show promising Wi-Fi connectivity and high-definition video that streams live ...
Electronics / Consumer & Gadgets
Feb 03, 2012 |
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Scientists chart high-precision map of Milky Way's magnetic fields
(PhysOrg.com) -- Scientists at the Naval Research Laboratory (NRL) are part of an international team that has pooled their radio observations into a database, producing the highest precision map to date of ...
Feb 03, 2012 |
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Radio stars: Caltech's astronomy professor searches for cosmic radio waves
Growing up in rural northwest Ireland, beyond the reach of city lights, Gregg Hallinan fell in love with the night sky. "When you didn't have bad weather, and you didn't have clouds, the skies were nothing ...
Feb 03, 2012 |
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Do black holes help stars form?
(PhysOrg.com) -- The center of just about every galaxy is thought to host a black hole, some with masses of thousands of millions of Suns and consequently strong gravitational pulls that disrupt material around ...
Feb 03, 2012 |
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Stellar astrophysics explains the behavior of fast rotating neutron stars in binary systems
Pulsars are among the most exotic celestial bodies known. They have diameters of about 20 kilometres, but at the same time roughly the mass of our sun. A sugar-cube sized piece of its ultra-compact matter ...
Feb 02, 2012 |
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Hot molecule explains cold chemistry
(PhysOrg.com) -- Surprisingly, hydrogen cyanide and its far more energetic isomer, hydrogen isocyanide, are present in almost equal amounts in cold interstellar gas clouds. Scientists from the Max Planck Institute ...
Jan 30, 2012 |
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Rap music powers rhythmic action of medical sensor
(PhysOrg.com) -- The driving bass rhythm of rap music can be harnessed to power a new type of miniature medical sensor designed to be implanted in the body.
Jan 26, 2012 |
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LED lights point shoppers in the right direction
Looking for an item in a large department store or mall can be like searching for a needle in a haystack, but that could change thanks to a hybrid location-identification system that uses radio frequency transmitters and ...
Jan 26, 2012 |
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US warns of mobile radio band bottleneck
The United States seeks to avoid bottlenecks in crowded global mobile radio spectrums, the head of a US delegation to the World Radiocommunication Conference said here Monday.
Jan 23, 2012 |
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Global radio experts float new mobile phone standard
Global radio experts have approved radio standards that are to usher in a new mobile phone operating system to replace third generation or 3G technology, the International Telecommunication Union announced ...
Jan 20, 2012 |
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UN sets stage for blazing fast new mobile devices
(AP) -- A United Nations telecom meeting has approved the next generation of mobile technology, which experts say will make devices 500 times faster than 3G smartphones and eliminate the wait time between the tap of a finger ...
Jan 19, 2012 |
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British pharmacy chain announces roll-out of new smart pills loaded with microchip
(Medical Xpress) -- A new pharmaceutical program that many Britons might find literally hard to swallow, has been announced. Pharmacy chain Lloydspharmacy has partnered with American technology firm Proteus ...
Medicine & Health / Medications
Jan 18, 2012 |
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Radio
Radio 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.
For more information about Radio, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
