Harbor Freight carries almost anything you could need, including useful car accessories like battery chargers. Here are the best of the bunch.

Fitness wearables can help you move more, sleep better, and stay healthy. Here's how to pick the right one for you, along with the best fitness trackers we've tested. I’m PCMag’s senior writer ...

Abstract: The Wigner–Smith (WS) time-delay matrix relates an electromagnetic system’s scattering matrix and its frequency derivative. Previous work showed that the entries of WS time-delay matrices of ...

An extra hand indicating another time zone has made the GMT watch useful and popular, but also more complicated than a basic time-telling watch — and for many years, a well-built mechanical one was ...

Abstract: This article is concerned with the stability of discrete-time systems with fast-varying coefficients that may be uncertain. Recently, a constructive time-delay approach to averaging was ...

Better sleep supports your overall health, while poor sleep can harm mood, thinking, heart health, immunity, and raise obesity and diabetes risk. Improve your circadian rhythm by getting bright light ...

This paper presents a novel design of an X-band (812 GHz) 4-bit monolithic microwave integrated circuit (MMIC) type true-time-delay (TTD) line for wideband high-resolution imaging radar applications.