Founded in 1979 as Sigma Extruding, Sigma Plastics Group is the second largest producer of plastic film and sheet for industrial, institutional and government ...

Evaluating the Q factor of antennas using metamaterial substrates is a challenge and requires new analysis techniques. This challenge is even more important for arbitrary-shaped antennas. In this ...

A classic puzzle conundrum goes like this: You’re in a room with two ropes and a box of matches. Each rope takes exactly an hour to burn all the way across, but it might burn faster through some ...

As one of the most typical multistate systems, weighted k-out-of-n system has been extensively studied in recent years. This paper presents a new kind of multistate weighted k-out-of-n system, which ...

While some fire victims are opting to sell their lots in Altadena, one woman is choosing to stay and rebuild — and she's trying to do it as quickly as possible.