Rhythmic oscillations in the theta (4-12 Hz) and gamma (30 100 Hz) frequency bands have been recorded in the hippocampus and the entorhinal cortex, and have been implicated in cognitive processes including memory, spatial navigation and sleep (Buzsáki 2002, 2006; Kahana et al. 1999; O’Keefe and Recce 1993; Traub and Whittington 2010; Buzsáki and Wang 2010; Engel et al. 2003; Fries 2009; Singer ...

The structures of four polyhexapeptide collagen models have been investigated by X-ray diffraction. It has been found that (Gly-Ala-Pro-Gly-Pro-Pro),, (Gly-Pro-Ala-Gly-Pro-Pro),, (Gly-Ala-Pro-Gly-Pro-Ala), and (Gly-Ala-Ala-GlyPro-Pro),, all show typical collagen-like diffraction patterns, although there is some variation among the polymers in modes of lateral packing and in axial repeat distanc...

Tubular organs are essential for organisms to establish transport systems for nutrients, liquids and gases. The development of tubes requires endocytosis of bound ligands, receptors and proteins at the plasma membrane (Bonifacino and Traub, 2003; Nelson, 2009). Clathrin coated vesicles (CCVs) organize major routes of cargo selective endocytosis in higher eukaryotic cells (Conner and Schmid, 200...

Keywords: Sixth-order convergence Extraneous fixed point Asymptotic error constant Efficiency index Double-Newton method Basin of attraction a b s t r a c t A high-order family of two-point methods costing two derivatives and two functions are developed by introducing a two-variable weighting function in the second step of the classical double-Newton method. Their theoretical and computational ...

Benabou and Ok use expected utility to argue the prospect of upward mobility may cause majority rejection of redistributive taxes that benefit the majority. In paid computerized experiments subjects in a lower pay class exhibit risk preference but are risk averse in a higher class. This suggests behavior toward risk is not constant but depends on relative position. It is as if the reference poi...

Shape, motility, viscosity and organelle distribution of animal cells is regulated, or at least influenced, by fibrous proteins constituting a 'cytoskeleton' that involves the F-actin-based microfilaments (5-7 nm in diameter) and the microtubules (20-25 nm). In addition, most vertebrate cells contain a third type of highly organized protein bundle, the intermediate filaments (IF; 8-12 nm). Thei...

In an article concerning problems that are impossible to solve exactly, but which can be computed in an average sense, J. F. Traub and H. Wozniakowski raised a challenge: \We believe it is time to up the ante and try to prove there are unanswerable scientiic questions. In other words, we would like to establish a physical GG odel's theorem.""1]. Out of this idea grew a workshop and computer sci...

We consider the problem of optimal recovery of solutions of the generalized heat equation in the unit ball. Information is given at two time instances, but inaccurate. The solution is to be constructed at some intermediate time. We provide the optimal error and present an algorithm which achieves this error level. The application of optimal recovery theory to problems of partial differential eq...