In 1965, there was one Spirograph set. Today, there are over 30 different sets to choose from. You can even buy a set that ...

Learning doesn’t always mean flipping through heavy textbooks or sitting in a long lecture. Sometimes, it just takes ...

Hot Toys is bringing the Dark Knight back to the early days of his crime-fighting career with a slick new collectible ...

Abstract: Thin-walled spiral bevel gears, operating at high speeds, inevitably exhibit multiple high-order nodal diameter (ND) vibration resonance points. Excessive vibration intensity can lead to ...