Abstract Rhenium, Os, and Pt are redox sensitive elements that concentrated in highly reducing environments such as those associated with black shales but mobile under more oxidizing conditions arc volcanism. They chalcophile many terrestrial ore-forming environments, their isotopic systematics provide unique opportunities to date the formation of sulfide ore deposits understand petrogenesis. F...

the square map is one of the functions used in cryptography. for instance, the square map is used in rabin encryption scheme, block cipher rc6 and stream cipher rabbit, in different forms. in this paper, we study statistical properties of the output of the square map as a vectorial boolean function. we obtain the joint probability distribution of arbitrary number of the upper and the lower bits...