Telecom

A first for search and rescue from space

Between September 1982 and December 2020, at least 51,512 people were rescued on land and at sea with help from a network of Earth-orbiting satellites able to detect and locate emergency distress beacons.

Consumer & Gadgets

The first mobile phone call was 75 years ago: A look back

I have a cellphone built into my watch. People now take this type of technology for granted, but not so long ago it was firmly in the realm of science fiction. The transition from fantasy to reality was far from the flip ...

Electronics & Semiconductors

A combined optical transmitter and receiver

Researchers at Linköping University, together with colleagues in China, have developed a tiny unit that is both an optical transmitter and a receiver. "This is highly significant for the miniaturisation of optoelectronic ...

Energy & Green Tech

How wireless recharging works – and doesn't, yet

Though the days of hardwired wall-mounted phones are ending and wireless internet connections are common at home and on the go, people are still dependent on cords to charge their mobile devices. My research, and that of ...

page 1 from 2