Since 1919, the hard hat has been the most iconic symbol of worker safety. But despite more than six million hard hats and safety helmets sold each year, more than 18,000 still suffered traumatic ...

Rotary motor motion is usually converted to linear through rack and pinion sets, belts and pulleys, and other mechanical linkages. These are effective but limited systems. In contrast, integrated ...

An F-15 Eagle assigned to Kadena Air Base, Japan, prepares to be refueled by a KC-135 Stratotanker assigned to McConnell Air Force Base, Kan., over the Joint Pacific Alaska Range Complex during ...