Physicists are eyeing charged gravitinos—ultra-heavy, stable particles from supergravity theory—as possible Dark Matter ...

WASHINGTON — The Federal Reserve, goaded by the risk of rising unemployment, reduced interest rates on Wednesday for the first time since December and indicated more cuts would follow to halt any ...

In calculus, the concept of delta (Δ) represents a change in a variable. Delta is used to describe the difference between two values of a function or the variation of dependent variables when ...

Abstract: A new method for image restoration based on robust error function and BP neural network optimized with particle swarm optimization (PSO) is proposed in this ...

Abstract: This paper describes the design of an adaptive controller based on a barrier Lyapunov function (CBLF) that solves the trajectory tracking problem of a hybrid robotic structure with an ...

An illustration of a magnifying glass. An illustration of a magnifying glass.