Engineering

New standards developed to improve metal-detector testing

Metal detectors now appear routinely in the entrances of many schools, airports and even houses of worship. They serve as portals to correctional facilities, prisons and courthouses, and guards often wave the hand-held models ...

Software

Video game 'Death Stranding' bids to rekindle hope

In a world fractured by political populism and divisive voices on social media, can a video game build bridges to harmony? The Japanese auteur behind "Death Stranding" hopes so.

Business

Cobalt hits headlines as Glencore shuts key mine

Cobalt hit the headlines Wednesday after Glencore shut a key African facility that mines the rare metal—and blamed prices that have been tumbling from highs seen in recent years on battery demand.

Energy & Green Tech

Applied physical sciences research advances solar energy

In an article published this month in Science, researchers in the Huang Group in the College of Arts & Sciences' department of applied physical sciences at The University of North Carolina at Chapel Hill revealed a new method ...

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Metal

In chemistry, a metal (Greek: Metallo, Μέταλλο) is an element, compound, or alloy characterized by high electrical conductivity. In a metal, atoms readily lose electrons to form positive ions (cations); those ions are surrounded by delocalized electrons, which are responsible for the conductivity. The thus produced solid is held by electrostatic interactions between the ions and the electron cloud, which are called metallic bonds.

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