When people are dropped into the most dangerous of conditions – as when disaster strikes, or during exploration of another ...

Abstract: Construction is a high-risk industry where workers are frequently exposed to potential injuries, particularly head injuries. Safety helmets serve as a critical defense, yet many workers ...

Abstract: Nowadays, DC (direct current) motors are widely used in industry. Air conditioners, computer drives, electric toothbrushes, portable vacuum cleaners, drilling machines, trimmers, food mixers ...