Trump’s love of letters provides a window into his approach to communication and the presidency. He likes tactile things. He cherishes the attention. He wants something to show off.

An application of stationary double electric layer capacitor energy storage posts in the trolleybus energy supply system is proposed to increase the distance between traction rectifying substations ...

For a set of T independent observations of the same N-variate correlated Gaussian process, we derive a method of estimating the order of an autoregressive (AR) model of this process, regardless of its ...