Longtime NHL executive Ray Shero, the general manager of the Pittsburgh Penguins when they won the Stanley Cup in 2009, has died. He was 62. The Minnesota Wild announced Shero’s death Wednesday. A ...

Abstract: X-ray flat surfaces utilized in most advanced light sources have posed challenges to achieve form accuracy of PV 2 nm, RMS 0.2 nm and RMS 50 nrad ...

\(power \ of \ a \ lens \ (D) = \frac{1}{focal \ length \ (m)}\) A lens has a power of -3.33 dioptres. Calculate the focal length and state what type of lens it is.

And Arsenal legend Ray Parlour believes his old side has what it takes to get past the Spanish titans. “Either Madrid team would be difficult to face, but the glamour tie is most definitely Real ...