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.

Engineering

Facebook engineers announce development of Time Cards

A pair of Facebook engineers have announced the development of Time Cards—PCIe cards that can be used in x86 architecture machines to serve as a timekeeping device. In their announcement on the Facebook Engineering blog ...

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 ...

Telecom

Laser communications: Empowering more data than ever before

Launching this summer, NASA's Laser Communications Relay Demonstration (LCRD) will showcase the dynamic powers of laser communications technologies. With NASA's ever-increasing human and robotic presence in space, missions ...

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Radio

Radio is the transmission of signals by modulation of electromagnetic waves with frequencies below those of visible light. Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass through the air and the vacuum of space. Information is carried by systematically changing (modulating) some property of the radiated waves, such as amplitude, frequency, or phase. When radio waves pass an electrical conductor, the oscillating fields induce an alternating current in the conductor. This can be detected and transformed into sound or other signals that carry information.

This text uses material from Wikipedia, licensed under CC BY-SA