National Security Journal on MSN

Strap a Rocket to an Eagle: Inside Boeing’s F-15 “Global Strike Eagle”

In 2006, Boeing proposed the F-15 “Global Strike Eagle,” a rocket-carrying variant that could air-launch small satellites or hypersonic payloads. -The concept mounted a 45-foot, three-stage ...
MyStateline.com

How can you tell time without a clock? Build a sun dial

The Discovery Center Museum in Rockford is teaching visitors how to make a sundial, an ancient tool used to tell time using the sun.
Black Bear Forge on MSN

Twisting Hot Angle Iron

The art of blacksmithing is in the details. This guide shows you how to twist hot angle iron to create a beautiful and strong ...
IEEE

Effects of Sidewall Angle in Silicon Waveguide for High Degree Cascaded Pulse Compression at 2.0 μm

Abstract: We analyze the cascaded pulse compression performance in the silicon waveguide with the sidewall angles from 90° to 70° at 2 μm, where the compression factor declines from 32.17 to 14.47.
PV Tech

FTC Solar launches automated 80 degree hail stow angle for 1P Pioneer tracker

The 80 degree range of motion is an improvement over the 60 degree range of motion previously available for the 1P Pioneer tracker. Image: FTC Solar. US tracker manufacturer FTC Solar has launched an ...
unilad

‘Folded boy’ stands up straight for the first time after spine was contorted at 180-degree angle most of his life

After spending most of his life bent over at a 180-degree angle, a young man has stood up straight for the first time. Jiang Yanchen, from China's Shandong province, suffers from a rare a severe form ...
IEEE

S-band LMS propagation channel behaviour for different environments, degrees of shadowing and elevation angles

Abstract: Experimental land mobile satellite (LMS) propagation data have been processed in order to characterise the behaviour of this channel under narrow-band transmission conditions for different ...