The Eindhoven system has so far used the light rays only to download; uploads are still done
using radio signals since in most applications much less capacity is needed for uploading.
The network tracks the precise location of every wireless device
using its radio signal transmitted in the return direction.
Current Wi - Fi
uses radio signals with a frequency of 2.5 or 5 gigahertz.
The new system, dubbed «WiTrack,»
uses radio signals to track a person through walls and obstructions, pinpointing her 3 - D location to within 10 to 20 centimeters — about the width of an adult hand.
The GNSS tide gauge
uses radio signals from satellites in orbit around Earth that are part of satellite navigation systems like GPS and Glonass (Russia's equivalent of GPS).
Now they're
using a radio signal beamed from the top of Sears Tower in Chicago to draw the creatures - and their valuable DNA - to them.
Not exact matches
NASA
uses a technique called data sonification to take
signals from
radio waves, plasma waves, and magnetic fields and convert them into audio tracks to «hear» what's happening in space.
In the end, the committee's advisory report recommended tracking all drones,
using a mix of
radio and cell tower
signals to continuously monitor more sophisticated ones, while less sophisticated drone models could be tracked intermittently through software modifications.
Ultimately, homes will be wired with multiple systems and multiple protocols,
using multiple
radio signals and sensors.
The Israeli company's sensors
use radio frequency
signals to create 3 - D scans.
Homes and businesses typically
use a router, or some other base station device allowing this mobility by accessing
radio signals through the airwaves.
«We have a
Signal 7 in Room 229,» Hollywood Fire Rescue units said of 92 - year - old Miguel Antonio Franco,
using their code for a deceased person, according to emergency
radio calls provided by the audio streaming website Broadcastify.
Older wireless receivers
used analog
signals, but these are open to interference from other wireless devices like cell phones, cordless land line phones,
radios, etc..
Continue with your Shuffle position until the clock strikes 6:00 a.m. Consider
using an alarm clock
radio or a light with an appliance timer to help
signal to your child when it is wake up time.
Distributed computing has been
used to find Marsenne Prime Numbers (GIMPS), process
radio signals to detect alien trasmissions -LRB-[email protected]-RRB-, or calculate protein foldings -LRB-[email protected]-RRB-.
For more than a decade, scientists at Haystack Observatory have studied plasma plume phenomena
using a ground - based technique called GPS - TEC, in which scientists analyze
radio signals transmitted from GPS satellites to more than 1,000 receivers on the ground.
Instead of such circuits, an SDR
uses digital -
signal - processing chips to allow a programmer to define the wave shape of a
radio signal, the frequency it
uses and the power level.
Ossmann found that
using the
radio to emit a high - power radar
signal causes a reflector to wirelessly transmit the data from keystrokes, say, to an attacker.
He realised that you could
use an app to insert a short SOS message into the name field of a phone's Wi - Fi hotspot, too, as these can broadcast a
radio signal without requiring internet access.
But the transmitter pinged an hourly
signal to an Inmarsat satellite and those
radio pulses were
used to work out a rough flight path for the missing plane.
With further refinements, he found a way for ships to talk to each other
using Morse code — the quintessential pulsed
signal — and in 1896, just 21, he traveled to England and set up a
radio company, British Marconi.
He had inadvertently been
using Earth to propagate a
radio signal close to the ground.
We
used steel tubes several inches in diameter, with many pounds of propellant, and
radios inside so that we could pick up the
signal from them.
Underwritten by a $ 26 million donation by Microsoft cofounder Paul Allen, the array currently consists of 42 dishes, each 20 feet in diameter, which can be
used to listen for
signals from several stars in many different
radio bands simultaneously.
Instead of satellites, Locata
uses ground - based equipment to project a
radio signal over a localised area that is a million times stronger on arrival than GPS.
At the end of the fibre, those
signals are broadcast
using a
radio antenna, providing 3G and Wi - Fi access simultaneously, for instance.
Breakthrough Listen's search for
radio signals of extraterrestrial origin is
using a new telescope at Green Bank that's vastly bigger and more sensitive.
For this year's solar eclipse, they will observe
radio signals using an existing network of GPS receivers in Missouri, and intersperse it with small, cheap GPS receivers that are similar to the kind in most phones.
Originally developed by the US government for military navigation, satellite navigation systems are now widely
used by anyone with a GNSS device, such as an in - car SatNav, mobile phone or handheld navigation unit, which can receive the
radio signals that the satellites broadcast.
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 array began operating in 2007,
using low - cost electronics to combine the input from the many
radio antennas and to comb through the resulting
signal, simultaneously doing conventional
radio astronomy and scanning for
signals from ET.
Known as a passive communications satellite because it carried no electronics but rather acted as a giant
signal reflector, it was
used by Bell Labs engineers to successfully bounce telephone,
radio and television
signals off it.
Four metal contacts in each hemisphere of the globe send
radio signals that the pen picks up and
uses to triangulate its position.
I borrowed one that could detect
signals from 100 kilohertz (kHz), just below the frequency of long - wave
radio stations, up to 3 gigahertz (GHz), somewhat above the 2.4 GHz portion of the spectrum used by Wi - Fi connections (see «Radio Ways,» be
radio stations, up to 3 gigahertz (GHz), somewhat above the 2.4 GHz portion of the spectrum
used by Wi - Fi connections (see «
Radio Ways,» be
Radio Ways,» below).
In the late 1980s Philippe secured time on a large
radio telescope near the Loire Valley and permission to
use it as a transmitter of terrestrial
signals rather than a receiver of celestial ones.
If the
signals generated were transmitted only from the ground,
radio astronomers could seek remote sites and
use the shielding property of the Earth's curvature or the shelter of hills.
Using the world's largest
radio telescope, two astronomers from Swinburne University of Technology in Australia have detected the faint
signal emitted by atomic hydrogen gas in galaxies three billion light years from Earth, breaking the previous record distance by 500 million light years.
«The
signals are not only weak, but they appear at
radio frequencies that are
used by communication devices and radars, which generate
signals billions of times stronger than the cosmic ones that we are trying to detect.»
The team sent the
signals from a 70 - metre
radio antenna in Goldstone, California, and recorded the returning
signals using the Very Large Array (VLA) of 27
radio telescopes in New Mexico to compile a radar map of Mars.
The same is true when you
use a mixer in the kitchen, or a drill, or turn on a fan — unless you're trying to beam
radio signals to aliens, pretty much all of the energy you
use will end up heating the Earth.
We basically applied
signal - processing techniques that have been
used in
radio signals to understand how synchronized these two
signals are.
Teams in the United States, Europe, and Australia hope to see a
signal within 2 or 3 years — although the U.S. effort is threatened by plans at the National Science Foundation to defund the two
radio telescopes it
uses.
It's similar to how GPS
uses the timing of satellite
signals to determine the position of your cell phone — and it would mean spacecraft would no longer have to rely on
radio telescope communications to find their coordinates.
Because the sensor
uses the ambient
radio - frequency
signals that are already around us, it doesn't need a power supply.
They vibrate at the frequency of an FM
radio signal, so they could be
used for miniaturized communications systems.
The researchers hope to further reduce the size of the device
using purpose - built
signal processing chips and to connect the aid to the headset with a
radio link rather than a wire.
By precisely measuring the orbital movements of MESSENGER
using the subtle Doppler frequency shifts of its
radio signal, geodesist David Smith of the Massachusetts Institute of Technology in Cambridge and 16 colleagues measured how the pull of gravity varies across Mercury, as the team reports online today in Science.
But now mission controllers must «focus on new classes of science,» the most exciting of which is
using Spirit's
radio signal to track the motion of Mars both in its orbit and in its spin on its axis.
Using radio telescopes in Spain, France, and Australia, a team headed by researchers from the Max Planck Institute for Radio Astronomy in Bonn, Germany, scanned the LMH for signals in the precise wavelengths that would reveal the presence of more complex molec
radio telescopes in Spain, France, and Australia, a team headed by researchers from the Max Planck Institute for
Radio Astronomy in Bonn, Germany, scanned the LMH for signals in the precise wavelengths that would reveal the presence of more complex molec
Radio Astronomy in Bonn, Germany, scanned the LMH for
signals in the precise wavelengths that would reveal the presence of more complex molecules.
In addition to time on the 100 - meter - wide Green Bank Telescope in West Virginia and the 64 - meter Parkes
Radio Telescope in New South Wales, Australia, the project will also
use the 2.4 - meter Automated Planet Finder Telescope at the Lick Observatory on Mount Hamilton near San Jose, California, to search for possible optical laser
signals from another world.