A theory of the attenuator-coated helical slow-wave structure of a traveling-wave tube has been developed by considering the helix turns to be effectively shorted by a resistive coating. Power ...

It will grow to $7.18 billion in 2029 at a compound annual growth rate (CAGR) of 15.6%.” — The Business Research Company LONDON, GREATER LONDON, UNITED KINGDOM, July 4, 2025 /EINPresswire.com/ -- Save ...

An unusual x-ray signal from the Helix Nebula, first detected in 19180, could stem from a star destroying a nearby planet.