Abstract: This article establishes the notion and properties of angle rigidity for 3-D multipoint frameworks with angle constraints, and then designs direction-only control laws to stabilize angle ...

But the first time I noticed a tiny metal triangle tucked into the corner of a staircase, I couldn’t stop staring. It looked ...

Whether you're a frequent flyer or just occasionally jet off with mates or family, there are probably a few curious questions that have crossed your mind, such as why cabin lights are dimmed during ...