The smaller the particles, the more worrying they are. Particulate matter measuring 10 micrometers or less in diameter — a fraction of the width of a human hair — is referred to as PM10, and it is ...

In this letter, a simple but very effective theoretical analysis is presented for the first time to model an asymmetric split-cylinder resonator (SCR) formed by the loading of multilayer samples. The ...

The Meter Pro from SwitchBot is so easy to use, and will keep me updated on firework smoke, air hazards and more.