PORTLAND, Ore. — Multnomah County leaders have decided not to install weapons detection systems at Portland’s Central Library, citing research and community survey feedback that suggested metal ...

Smartphones are loaded with sensors and components that power the surface-level features you use every day. Some of them you might know about — like the ambient light sensor used to handle automatic ...

Abstract: Metal detectors detect hidden metal objects through electromagnetic induction. Significant research has focused on improving the detector sensitivity by redesigning the structure of ...

Its a big story whenever metal detectorists uncover a valuable archaeological treasure—not just an interesting trinket here or there, but an actual cache of precious items that reveal the presence of ...