We describe non-conventional localization of the midband E = 0 state in square and cubic finite bipartite lattices with off-diagonal disorder by solving numerically the linear equations for the corresponding amplitudes. This state is shown to display multifractal fluctuations, having many sparse peaks, and by scaling the participation ratio we obtain its disorder-dependent fractal dimension D2....

A new generalized unsupervised competitive learning rule is introduced for adaptive scalar quantization. The rule, called generalized Boundary Adaptation Rule (BARr), minimizes r-th power law distortion Dr in the high resolution case. It is shown by simulations that a fast version of BARr outperforms generalized Lloyd I in minimizing D1 (mean absolute error) and D2 (mean squared error) distorti...

Introduction: Spreading depression (SD) is a propagating wave of depolarization followed by depression of the neuroglial activities and can modulate extracellular dopamine concentrations in the neocortex. It has been shown that the dopaminergic system plays a role in migraine. SD has been suggested as a critical phenomenon in the pathophysiology of migraine. The aim of this study was to investi...

Let d = d1 ≤ d2 ≤ · · · ≤ dn be a non-decreasing sequence of n positive integers, whose sum is even. Let Gn,d denote the set of graphs with vertex set [n] = {1, 2, . . . , n} in which the degree of vertex i is di. Let Gn,d be chosen uniformly at random from Gn,d. It will be apparent from Section 4.3 that the sequences we are considering will all be graphic. We give a condition on d under which ...

previous studies have shown that ascorbic acid (aa) plays a crucial role in mammalian brain as avitamin and neuronal modulator. there is increasing evidence indicating that dopaminergic system and aacould affect learning and memory processes. in addition, vitamin c acts as a dopamine antagonist in thebrain. the aim of the present study was to evaluate the intra-hippocampal co-administration of ...

We consider the flat supersymmetric D2 and anti-D2 system, which follows from ordinary noncommutative D2 anti-D2 branes by turning on an appropriate worldvolume electric field describing dissolved fundamental strings. We study the strings stretched between D2 and anti-D2 branes and show explicitly that the would-be tachyonic states become massless. We compute the string spectrum and clarify the...

in this investigation wer studied the effect of dopaminergic system on the conflict behavior in rat, using vogel’s test. the related drugs were injected intraperitonealy (ip), and produced the following results:diazepam at doses of 0.5 and 1 mg/kg increased the lick –shock responses in the vogel’s thest. quinpirole (d2-agnosit), at doses of 0.1 and 10 mg/kg, increased the confict responses, whe...