Abstract: This paper provides a numerical analysis using the finite-difference time-domain method for an electromagnetic source moving at speeds faster than light, comparing the results with Heaviside ...

Your home's security is not something you should take lightly. Motion-activated security lights emit bright light as soon as any motion is detected, potentially deterring intruders and helping you ...

What if you could slow down time so much that the invisible became visible? Veritasium takes a closer look at how advancements in high-speed imaging have unlocked a hidden world, revealing phenomena ...

Abstract: Three-dimensional packing problems are important optimization problems with practical applications in various fields including manufacturing, logistics, and transportation. In this study, we ...

Practice projectile motion with fully solved physics problem examples. This video walks through step-by-step solutions to help you understand equations, motion components, and problem-solving ...

Motion-sensor lights do two useful jobs. They cut wasted lighting hours and make night-time movement safer while giving the impression of an occupied, alert home. Here is a practical, room-by-room ...

(FOX40.COM) — UC Davis hosted its 16th annual campus safety lighting walk Wednesday night. Like a moth to a flame, volunteers joined together to inspect lights all across campus — looking out for ...

MONTREAL - A technical problem with trains running on Montreal’s light-rail network led to a full shutdown for an hour at the end of the morning rush hour Tuesday, causing delays for commuters. A ...

An aerial view of the REM train travelling from Ile Bigras on the Deux Montagne line in Laval, Que., on Friday, Dec. 12, 2025. THE CANADIAN PRESS/Christinne Muschi MONTREAL — A technical problem with ...