The extent to which species richness in local communities is determined by regional and historical processes is not well understood. An increasingly popular way to investigate these large-scale processes is through regressions of local on regional species richness. We sampled local and regional species richness in a broad array of taxa from around the world to address five questions. First, is ...

in this research, recognition of karstic water-bearing zones using the management of exploration data in kal-qorno valley, situated in the tepal area of shahrood, has been considered. for this purpose, the sequential exploration method was conducted using geological evidences and applying remote sensing and geoelectrical resistivity methods in two major phases including the regional and local s...

Background: The mechanisms underlying cerebral hypercapnic vasodilatation are not fully understood. Objective: To investigate the role of nitric oxide (NO) and ATP-sensitive potassium (KATP) channels in basal blood flow regulation and hypercapnia-induced vasodilatation in rabbit cerebral blood vessels. Methods: The change in cerebral blood flow was measured by a laser Doppler flowmeter in 18 Ne...

In this paper has been studied the problem of consensusability for singleinput discrete-time MASs over directed communication graphs with fixed topology. The control input of each agent can only use its local state and the states of its neighbors. The results obtained in this paper extend some recent known results for the case when the network topology is a weighted digraph jointly containing a...

Abstract Marine terraces have long been used as baseline geodetic markers of relative past sea levels, reflecting the interaction between vertical crustal movements and sea level oscillations. The terraces age and elevation of shoreline angles can be used to determine uplift rate. Disparate uplift rates in pervious investigation in the study area are related to manual measurements based on ...

where V (y) is a smooth bounded function with positive lower bound, ε > 0 is a small number, 2 < p < 2N/(N−2) if N > 2 and 2 < p <+∞ if N = 2. Many works have been done on problem (1.1) recently (cf. [6, 7, 8, 16, 21, 22, 23]). One of the results in the papers just mentioned is that if x1,x2, . . . ,xk are k different strictly local minimum points of V (y), then (1.1) has a k-peak solution uε, ...

Hoffmann’s topological analysis of the h and h F state spaces explained why Fast Forward dominated the performance on early planning domains (Hoffmann 2004). His taxonomy segmented domains according to the presence/size of local minima and dead-end class. Surprisingly, the taxonomy has not been used to explain the performance of other planners that use similar heuristics. In this paper, we exte...