Some are experimenting with radio frequency identification and other sophisticated methods including etching identification codes on produce with lasers
a receiver in its front end picked up a radio signal and followed it around the curve.
One project, working through partner radio stations in Tanzania, Uganda, Ghana, Mali, and Malawi, has reached an estimated 40 million listeners. 6. African farms use the least amount of modern technology in the world,
The system could pick up radio frequencies beyond the range of normal human hearing. In a similar manner bioengineers might one day incorporate sensors into other tissues for example creating a bionic meniscus that can monitor strain.
of the radio spectrum that is traditionally reserved for television broadcasts. The holy grail of wireless communications is to go both fast and far said lead researcher Edward Knightly professor and chair of Rice's Department of Electrical and Computer Engineering.
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