Megawatt structured light arrives with 3,070 optical vortices in one array

Optical vortices—light beams carrying orbital angular momentum (OAM)—are characterized by helical wavefronts and phase ...
IEEE

Receive Beamforming Using Sum and Difference Virtual Co-arrays for Dual-Function Radar Communications

Abstract: The dual-function radar and communication (DFRC) system addresses the problem of radio frequency congestion. Sparse arrays can reduce system cost and increase array aperture by constructing ...
IEEE

A Sum-Difference Expansion Scheme for Sparse Array Construction Based on the Fourth-Order Difference Co-Array

Abstract: A generalized sum-difference expansion scheme is proposed to construct sparse arrays based on the fourth-order difference co-array with increased degrees of freedom (DOFs). Different from ...
The Washington Post

They thought loved ones were calling for help. It was an AI scam.

The man calling Ruth Card sounded just like her grandson Brandon. So when he said he was in jail, with no wallet or cellphone, and needed cash for bail, Card scrambled to do whatever she could to help ...
CNET

Solar Cell, Module, Panel and Array: What's the Difference?

Homeowners have continued to show a growing interest in solar power over recent years. In fact, US residential solar system installations increased by 19% in 2021, according to the Solar Energy ...
The New York Times

Biden Is on a Roll That Any President Would Relish. Is It a Turning Point?

White House aides say the string of victories compares favorably to the two-year legislative record of most any other modern president. By Peter Baker WASHINGTON — President Biden arrived at Air Force ...