Scenes from the National Mall during a heat wave in Washington DC, on Tuesday, June 24, 2025. An excessive heat warning is in place for DC, with humidity expected to bring the heat index up to 110 ...

The eastern US is experiencing a severe heat wave impacting 160 million people, with temperatures hitting 104°F in New York.  ...

An antenna concept for compact millimeter-wave radar sensors that desire a fan-beam radiation pattern is proposed. It combines an end-fire antenna on a ceramic substrate with a cylindrical parabolic ...

This paper describes a new design of a relativistic Cherenkov oscillator with strong modulation of the e-beam current at the input of two-sectioned slow-wave structure, as well as numerical and ...