Snags are highly important for many wildlife species and ecological processes. In this study, we analyzed the relationship between snags topographic factors in a secondary forest plot South China. Data on 544 were collected recorded from 236 subplots permanent (400 subplots). The frequency of Castanopsis carlesii Schima superba was higher than that other species. derived mostly saplings small t...

We examine the structure of continuous circular hydraulic jump and recirculation for a jet impinging on disk. use composite mean-field thin-film approach consisting subdividing flow domain into three regions increasing gravity strength: developing boundary layer near impact, an intermediate supercritical viscous region comprising subcritical flow. Unlike existing models, does not require any em...

Steepness is a generic geometric property which, together with complex-analyticity, needed in order to ensure stability of nearly-integrable hamiltonian system over exponentially long times. Following strategy developed by Nekhoroshev, we construct sufficient conditions for steepness given function that involve algebraic equations on its derivatives up five. This important view applications (e....

The concept of heuristic decision making is adapted to dynamic influence processes in social networks. We report results of a set of simulations, in which we systematically varied: a) the members’ strategies for contacting fellow group members and integrating collected information, b) the steepness of status distributions in a network, and c) the clustering structure of the members’ communicati...