Abstract: In this paper, a dual-band dual-polarized aperture shared low-profile base station antenna based on the AMC structure is proposed. The proposed antenna introduces backcavity boxes which can ...

THURSTON COUNTY, Wash. — Four U.S. Army service members who were aboard a Joint Base Lewis-McChord (JBLM) helicopter that crashed in the Capitol Forest on Wednesday are presumed dead, according to U.S ...

TACOMA, Wash. (AP) — A U.S. Army helicopter assigned to Joint Base Lewis-McChord was on a routine training mission when it crashed in Washington state not far from the base, Army officials said ...

TACOMA, Wash. (AP) — A helicopter crashed in Washington state near Joint Base Lewis-McChord, the U.S. Army said Thursday. There was no immediate word of how many people were aboard and their ...

Abstract: The success of overcoming a problem depends on the quality of the task system into which it can be collectively transformed. Problem analysis includes many stages, within which different ...