Sentences with phrase «low frequency radio»

``... being considered by the US Air Force and the US Defense Advanced Research Projects Agency,... using very low frequency radio waves to flush particles from [the Van Allen radiation] belts and dump them into the upper atmosphere over either one or several days.

The particular type of radio spectrum Ingram is interested in is known as very low frequency radio or VLF.

When a scanner is passed over the microchip low frequency radio waves created by the scanner activate the microchip, allowing the unique number to be read.

Dubbed NenuFAR, the observatory is both a standalone instrument as well as a major extension to the existing $ 150m Low Frequency Radio Array (LOFAR), which is spread across eight European countries and centred in the Netherlands.

``... being considered by the US Air Force and the US Defense Advanced Research Projects Agency,... using very low frequency radio waves to flush particles from [the Van Allen radiation] belts and dump them into the upper atmosphere over either one or several days.

The Commander in Chief would then broadcast a firing order to the Polaris submarines via the Very Low Frequency radio station at Rugby.

Not exact matches

The narrowcast media include cable TV, videocassettes, videodiscs, local point - to - point broadcasting, low - power TV stations, subcarrier frequencies of FM radio and TV, and direct mail.

In a clinical study Fanton determined that the lower temperatures generated by radio frequency could, with minimal invasiveness, shrink and tighten ligaments, helping to prevent later dislocations.

«In addition to several excellent site options and a low - cost operating environment, we believe that it is our people, highly - skilled workforce, world - class colleges and universities, and strong regional competency in radio - frequency identification, sustainable packaging, flight controls, drone technology, high - performace computing, software development, and data analytics that will help our proposal stand out.»

«In addition to several excellent site options and a low - cost operating environment, we believe that it is our people, highly - skilled workforce, world - class colleges and universities, and strong regional competency in radio - frequency identification (RFID), sustainable packaging, flight controls, drone technology, high - performance computing, software development, and data analytics that will help our proposal stand out.»

At the center of the controversy are two blobs about 450 light - years apart that emit radio waves — light at the low - frequency end of the electromagnetic spectrum.

At radio frequencies greater than 10 gigahertz the radio emission matched that of the microwave background, but at lower frequencies it was several times stronger.

Roughly speaking, lower frequencies are cheaper to use than higher frequencies because they require less precise equipment, an important consideration for an industry that wanted to market radio receivers to the masses.

Although they last mere milliseconds at any single frequency, their great distances from Earth — and large quantities of intervening plasma — delay their arrival at lower frequencies, spreading the signal out over a second or more and yielding a distinctive downward - swooping «whistle» across the typical radio receiver band.

Today the picture of the radio spectrum is a color - coded colossus composed of hundreds of bands allotted by the FCC from frequencies as low as 6 kilohertz to as high as 300 gigahertz.

Parts of the string then emit low - frequency radio waves that accelerate the surrounding plasma into generating a burst of gamma rays.

Radio telescopes have picked up intense bursts of low - frequency static from a mysterious source that may lie hidden near the center of our Milky Way galaxy.

In the next two decades, as many as 20,000 satellites could be launched into low Earth orbit, LEDs will become the dominant source of artificial light, and fifth - generation mobile networks will fill radio frequencies, speakers warned during the annual meeting of the American Astronomical Society.

The new system, dubbed radiogenetics, uses a signal, in this case low - frequency radio waves or a magnetic field, to heat or move ferritin particles.

The latest tool is LOFAR, an array of 44 low - frequency radio detector stations that are being brought online across western Europe, 36 of them in the Netherlands.

In addition, antennas tuned to the right plasma densities can be sensitive to lower radio frequencies while remaining unresponsive to the higher frequencies used by most radars.

Defense contractor Lockheed Martin will soon flight - test a plasma antenna (encased in a tough, nonconducting polymer) that is designed to be immune from detection by radar even as it transmits and receives low - frequency radio waves.

The organic chips, commonly inserted under the skin of cats and dogs in lieu of identification collars, can be made cheaply but can only process low - frequency radio waves, giving them distance limitations.

Mixing light from these dual frequency combs together creates a «beat» frequency shifted down to the radio band, low enough to be measured.

R. S. Sharma, a public health specialist on the panel from the Indian Council of Medical Research, writes in the report that, «the hot tropical climate of the country, the low body mass index; low fat content of an average Indian as compared to European countries and high environmental concentration of radio frequency radiation may place Indians under risk of radio frequency radiation adverse effect.»

The NIST strategy requires inventing an entirely new field, which combines quantum physics and low - frequency magnetic radio, Howe said.

At the lowest frequencies, NIOSH says, radio signals can penetrate earth.

Other radio frequencies offer better options in the event of an emergency: at lower frequencies, radio signals can propagate through conductive materials like cables, pipes, power lines and wires.

There is also a requirement to accommodate a low main radio frequency (100 MHz) and to lengthen the electron bunches to alleviate multiple scattering within the bunches as well as to avoid collective effects driven by, amongst other effects, the chamber wall resistivity.

The NIST team is experimenting with low - frequency magnetic radio — very low frequency (VLF) digitally modulated magnetic signals — which can travel farther through building materials, water and soil than conventional electromagnetic communications signals at higher frequencies.

In the next few years, the array will also scan for artificial radio emissions as part of the search for extraterrestrial intelligence (SETI) at lower, neglected frequencies than past SETI missions.

Previous observations had suggested that very - low - frequency (VLF) radio waves (from 5 to 25 kilohertz) transmitted on Earth were helping to clear particles from the inner belt.

The CALLISTO (Compound Astronomical Low - cost Low - frequency Instrument for Spectroscopy in Transportable Observatory) spectrometers, designed and built by electronics engineer Christian Monstein of the Institute for Astronomy of the Swiss Federal Institute of Technology Zurich (ETH Zurich), record the intensity of electromagnetic radiation at radio frequencies, between 45 and 870 megahertz.

Their analysis reveals that linear, stochastic scattering by intense, natural very low - frequency radio waves — known as chorus waves — in Earth's upper atmosphere can account for the observed relativistic electron build - up.

The «smart» poster or T - shirt uses a low - power reflector to manipulate the signal in a way that encodes the desired audio or data on top of the FM broadcast to send a «message» to the smartphone receiver on an unoccupied frequency in the FM radio band.

Other new, somewhat smaller projects — such as the Low Frequency Array in Europe and the Allen Telescope Array in northern California — also promise to help brighten the future for radio astronomy.

They used low - frequency musical signals (both pure tones and songs from an iPhone) to modulate the 100 MHz carrier signal from the graphene, and then retrieved the musical signals again using an ordinary FM radio receiver.

The volumetric impedance phase shift spectroscopy (VIPS) device (Cerebrotech VisorTM, Cerebrotech Medical Systems, Pleasanton, CA) works by sending low - energy radio waves through the brain that change frequency when passing through fluids.

• In a bungled attempt at clarification of a letter by Valerie Yule about using concert technology to help older people discriminate dialogue (19 March, p 33), we added a sentence saying that compensating for the difficulty of picking out voices from low - frequency background noise «often requires that the radio or television be turned up to a level unpleasant for younger ears».

Low - power radio frequency transceivers will link the cameras, processors, and tongue arrays; later on, wireless technology will connect these elements.

To find out, the researchers at Fraunhofer IAF developed a mathematical model that describes how radio frequency circuits should be designed if they are to function at extremely low temperatures.

Low - Frequency Radio data from the CALLISTO spectrometer located in Glasgow is now included in the quick look images accessed from the RHESSI Browser.

«By doing this survey and making the results available, we are bringing low - frequency radio data, previously quite difficult to produce, to all astronomers in a simple and easy manner,» Perley said.

The low radio frequencies used by MARSIS will also be tapped to study Mars» ionosphere and the local effects of solar wind, researchers said.

«Because of the Earth's ionosphere, such a low frequency has proven very difficult for high - quality imaging, and it is only in the past few years that we have developed the techniques that make a project like the VLSS possible,» said Rick Perley, of the National Radio Astronomy Observatory (NRAO) in Socorro, NM.

The VLA Low - frequency Sky Survey (VLSS) is producing sky images made at an observing frequency of 74 MHz, a far lower frequency than used for most current radio - astronomy research.

Some of these are: - · Super small, lightweight and hyper - sensitive low - cost Graphene - based sensors and Radio Frequency ID (RFID)-- Higher speed, Low loss and power consumption graphene based optical transmitter and receiver for 5G systems — Making IoNT a low - cost and practical industrial and domestic solutions in Malayslow - cost Graphene - based sensors and Radio Frequency ID (RFID)-- Higher speed, Low loss and power consumption graphene based optical transmitter and receiver for 5G systems — Making IoNT a low - cost and practical industrial and domestic solutions in MalaysLow loss and power consumption graphene based optical transmitter and receiver for 5G systems — Making IoNT a low - cost and practical industrial and domestic solutions in Malayslow - cost and practical industrial and domestic solutions in Malaysia.

March 19 - 23, 2018, at Lorenz Center in Leiden, this workshop brings together experts and interested radio astronomers to learn how to produce high resolution images with the Low Frequency Array (LOFAR) and to discuss and finalize the details for implementing a pipeline to do this on a large scale to post-process already existing observations.

«With the GLEAM survey we were able, for the first time, to see this galaxy in its full glory with unprecedented sensitivity at low radio frequencies,» said Dr Kapinska.

In the 1950s, Reber sought a field that seemed neglected by most other researchers and turned his attention to cosmic radio waves at very low frequencies (1 - 2 MHz, or wavelength 150 - 300 meters).