With no certainty that a suitable unleaded alternative can ever be developed, the FAA must lead a broad-based and sustained commitment by government and the aviation community to reduce lead emissions ...

Multipath interference disrupts wireless signals, causing issues like TV ghosting and fading. Now, researchers have developed a passive metasurface that overcomes traditional filtering limits. Using a ...

This video presents a study in which researchers developed a passive metasurface that uses a time-varying interlocking mechanism with metal-oxide-semiconductor field-effect transistors to selectively ...