QUITO, Ecuador - The police arrived at the airport prepared to arrest a drug trafficker - a mariner whose crewmates the U.S. military had just killed.

Robots now see the world with an ease that once belonged only to science fiction. They can recognise objects, navigate ...

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Abstract: Human action recognition (HAR) methods based on ultra-wideband (UWB) multiple-input–multiple-output (MIMO) radar have demonstrated substantial potential in complex environments. However, the ...