Let $S_n$ be a sequence of partial sums of mean zero purely $d$-dimensional i.i.d. random vectors. Necessary and sufficient conditions are given for the existence of ...

This is a preview. Log in through your library . Abstract Many queueing models have embedded Markov chains, whose invariant probability vector is of a (modified) matrix-geometric form. The rate matrix ...

Expertise from Forbes Councils members, operated under license. Opinions expressed are those of the author. In an NBC News story about the reality gap between businesses talking about artificial ...

An ideal gene therapy vector should enable persistent transgene expression without limitations of safety and reproducibility. Here we report the development of a non-viral episomal plasmid DNA (pDNA) ...