News tagged with electromagnetic signals

At last, how many alien civilizations are there?

During the space age, 1961 was a special year: the Russian cosmonaut Yuri Gagarin became the first man to orbit Earth, while the American astronomer Frank Drake developed the now famous Drake Equation. This ...

Dec 03, 2012
4.1 / 5 (45) 294 | with audio podcast

Radio Waves: Alternative Power Source

(PhysOrg.com) -- Researchers at Duke University are harvesting ambient radio waves to power small microprocessor devices that consume very little energy. Devices such as sensors that monitor critical environmental ...

Jul 20, 2010 weblog
4.2 / 5 (13) 2 | with audio podcast

Perfect communication with imperfect chips

One of the triumphs of the information age is the idea of error-correcting codes, which ensure that data carried by electromagnetic signals — traveling through the air, or through cables or optical fibers ...

Aug 05, 2011
2.8 / 5 (4) 0 | with audio podcast