Would the sending of a radio signal to activate this system constitute a trespass to chattels?
The fences work by burying a boundary wire which transmits a radio signal to a collar.
This new wireless remote system operates from a radio signal rather than infrared light, dramatically increasing functionality and range.
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But when poachers carrying rifles or machetes traipse by a detector, it will send a radio signal to a treetop antenna.
What if these storms are so brutal they rarely subside long enough for a radio signal to find its way out?
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It works by stimulating hydrogen atoms to give off a radio signal.
Bluetooth uses a radio signal in the 2.4-gigahertz range to connect two or more devices for sharing data when they're close to each other.
Since all that dirt and heavy pipe provides lots of insulation, Nethercomm can beam a radio signal and not have to worry about interference.
This is because leaves, and even pine needles can soak up a radio signal and cause the overall system to degrade during the spring and summer.
"In our building in the Cybernetics department, we've got quite a number of doorways rigged up so that they pass a radio signal between the door frame, " he says.
By changing the frequency of a radio transmission many times a second, causing it to leap around in an apparently random fashion, a radio signal could be made almost impossible to intercept.
The insole does this by communicating with a "base station, " an intermediary device between the button in the shoe and the television set, which uses a radio signal to calculate and transmit the information.
This computer has no internal power supply, but when a specially designed reader sends out a radio signal, a tiny antenna draws power from the wave and uses it to wake the computer up.
Because of the time needed for a radio signal from Earth to reach the rover -- about 14 minutes at Mars' current position -- "We don't command the rover with a joystick or a steering wheel in real time, " Tompkins said.
When the chip is hit with a radio frequency signal, it emits a unique identifier number that functions like a long, unguessable password.
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Ambient radio waves have largely been ignored as a potential power source until recently, because the power of a broadcast radio signal rapidly decreases with distance.
However, GPS signals can fail or be fooled by a conflicting radio signal, said Professor David Last, an advisor to the to General Lighthouse Authority.
They could be used to make cheap radio-frequency identity tags in essence, printable bar-codes that transmit an identifying code in response to a pulsed radio signal.
Those who use the new Wi-Fi standard will notice the biggest benefit in crowded spaces, where a clean radio signal cuts through interference from other devices, even if their connection to their service provider falls short of 802.11ac's lofty speed limit.
Would each individual person affect the RFID tag's radio signal in a unique way?
After the bridge came down, Leekley sent out a Mayday signal over VHF radio, but hearing no response, he got on the phone and dialed 911.
Over 10, 000 tweets were collated, as well as videos from comedians, which will be beamed into space using a transmitter with a signal 20 times stronger than that of typical commercial radio transmitters.
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And its day seems almost over, when a signal comes over the radio.
Each of the 20 transceivers or "nodes" can transmit and receive to the other 19, meaning there can be up to 380 measurements (20 times 19) of radio signal strength within a short period of time (the transceivers transmit one after the other).
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The three fishermen's vessel didn't have an Emergency Position Indicating Radio Beacon, which transmits a distress signal anywhere in the world through a satellite system, the navy said.
Switch to a digital radio and, after a lag of less than two seconds as the digital signal takes over, WETA's music wafts through so clearly that when the DJ stops speaking, one suspects the radio has been turned off.
Simply because of the format of this radio station we have to give a signal to our stations.
Diodes are essential in radios to turn rapidly oscillating radio waves into a smoother direct-current signal that can power a speaker.
Main.net has found that even in the noisiest electrical environments, such as neighborhood transformers, there are always big enough gaps in the radio spectrum for repeaters to push a signal through.
Alcatel, however, will use a small radio transmitter concealed in the battery cover of the phone to transmit a coded low-power signal to the belt clip to tell it when to vibrate, a company spokesperson said after the press conference.
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