This paper presents a new method to enhance thermal energy harvesting with pulsed heat transfer. By creating a phase shift between the hot and cold sides of an energy harvester, periodically pulsed heat flow can allow an available temperature gradient to be concentrated over a heat engine during...

Let X be a random variable that has the distribution of a Poisson mixture with an absolutely continuous mixing distribution. An elementary proof is given that any estimator of the mixing density must converge slower than any power of the sample size.