When arriving at a disaster site, one of the most crucial tasks is to locate any survivors who may be trapped in the debris. A new module is designed to let drones do so, by detecting the radio signals of victims' mobile phones. Designed by Canadian firm Robotics Centre and manufactured ...
“The first is the sensitivity of the phones receiver, it almost certainly gets down to -90dBm and may be down past -120dBm when you take the inbuilt antenna design into account. A single layer of foil or aluminium is probably only good for between 20-70dB antenuation of the E field ...
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题目May 10 is China Brand(品牌)Day.People (1)c elebrate the day by having different activities to make Chinese brands known by more people.In fact,many Chinese brands are popular at (2)h ome and abroad(国外).Here are some examples. Technology(技术) From cellphones to...
Our youth are turning into mindless drones. We are partially to blame for this. Electronic devices, TV’s, iPods, hand held video game consoles, smart phones etc.… have taken the place of “babysitter”, and kids do not receive the interaction we did at their age. Now, we’re not ...
Prison officers carried out a search of cells at the prison and found drugs and cell phones. Detective Chief Inspector Steve Heatley from the Met said: "The drones carried a substantial amount of drugs and a large quantity of mobile phones into prisons, which we were able to intercept, thank...
Addiction to cellphones. Now, adults are trying new strategies to reverse the malaise. Cellphone bansare gaining traction, but many say they’re not enough. They argue for alternative stimulation: steering students outdoors or towardextracurricularsto fill time they ...
The drones were exposed to radiations for 30 minutes, using live cell phones kept in working mode with tape recorder at the speaker end, and positive response at the receiver's end. The parameters were analysed and compared with that of control drones. The concentration of various biomolecules...
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Maybe this is a little too small for you. If so,check out this EMP-protected cyberdeck. These days, we’re all running around toting smartphones and laptops that could always use a bit more charge. Portable battery packs have become popular,and [Anuradha] has designed one that packs plenty...