Four reaction time experiments examined the mental rotation process using a psychological refractory period paradigm. On each trial, participants made speeded responses to both a tone (S1) and a rotated letter (S2), presented with varying stimulus onset asynchronies (SOAs). If mental rotation of the stimulus letter can proceed while central mechanisms are busy with S1, then the effect of orient...

We present a new methodology to derive faster composite operations of the form dP + Q, where d is a small integer ≥ 2, for generic ECC scalar multiplications over prime fields. In particular, we present an efficient Doubling-Addition (DA) operation that can be exploited to accelerate most scalar multiplication methods, including multiscalar variants. We also present a new precomputation scheme ...

A re-examination of the medieval inscription found in Curinga, Southern Italy, reveals possibility that monastery there was “imperiale monasterium” mentioned donation deed 1062 by Robert Guiscard and therefore it founded Middle Byzantine period.

Recently there is a revived interest in national accounts for pre-industrial cultures, especially in the late-medieval period. There is one conclusion that can already be drawn from this new stream of research: per capita income turns out to have been higher than what had been assumed before. This revision of income estimates for the late medieval Eurasia has serious implications for research o...