We consider a random utility model of strategic network formation, where we derive a tractable approximation to the distribution of network links using many-player asymptotics. Our framework assumes that agents have heterogeneous tastes over links, and allows for anonymous and non-anonymous interaction effects among links. The observed network is assumed to be pairwise stable, and we impose no ...

Abstract A new ichnotaxonomic name, Transexcrementum cuniculus , is applied to tubular (cylindrical) tunnelings in coprolites. The type series of T. consists burrowed vertebrate (probably crocodilian) coprolites that originate from the Miocene Chesapeake Group Maryland, U.S.A. These complex trace fossils exhibit following combination characters: burrows not lined nor backfilled; opening and tra...

clay minerals are considered the most important components of clastic reservoir rock evaluation studies. the shurijeh gas reservoir formation, represented by shaly sandstones of the late jurassic-early cretaceous age, is the main reservoir rock in the eastern kopet-dagh sedimentary basin, ne iran. in this study, x-ray diffraction (xrd), x-ray fluorescence (xrf), scanning electron microscopic (s...

This study set out to evaluate the wound healing properties of brittle star extracts in vitro and vivo. Due great arm regeneration potential star, Ophiocoma cynthiae, present aimed effect hydroalcoholic undergoing models. The samples were collected from Nayband Bay, Bushehr, Iran. After induction stars, relating different times prepared. GC-MS analysis, MTT cell viability migration, Western blo...

The ability of Gaussian noise to induce ordered states in dynamical systems is here presented in an overview of the main stochastic mechanisms able to generate spatial patterns. These mechanisms involve: (i) a deterministic local dynamics term, accounting for the local rate of variation of the field variable, (ii) a noise component (additive or multiplicative) accounting for the unavoidable env...