I recently upgraded to the Ring Battery Doorbell Pro and love all the features I'm used to using, but find some new safety ...

Security cams don't always fare well in winter storms, but I've learned how to make sure they stay safe and in action.

Abstract: In this research, a metamaterial sensor, comprising periodic circular split-ring resonator and square split-ring resonator arrays, is proposed in a low terahertz band. An electromagnetically ...