Substantial evidence indicates that the hippocampus plays a critical role in long-term declarative memory. In contrast, the role of the human hippocampus in working memory, particularly when information needs to be maintained only for a few seconds, remains controversial. Using PET, we show robust activation of the right anterior hippocampus proper during the performance of both object and spat...

We consider the distribution in residue classes modulo primes p of Euler’s totient function ϕ(n) and sum-of-proper-divisors s(n):=σ(n)−n. prove that values for n≤x are coprime to asymptotically uniformly distributed among p−1 p, 5≤p≤(logx)A (with A fixed but arbitrary). also show s(n) n composite all every p≤(logx)A. These appear be first results their kind where modulus is allowed grow substan...

one of the conventional methods for temporary support of tunnels is to use steel sets with shotcrete. the nature of a temporary support system demands a quick installation of its structures. as a result, the spacing between steel sets is not a fixed amount and it can be considered as a random variable. hence, in the reliability analysis of these types of structures, the selection of an appropri...