Recent physiological investigations1-3, 5 have suggested that in humans there is greater sensitivity and discrimination for horizontally and vertically oriented edges and gratings than for diagonal ones. Several investigations have looked for a neuro-physiological counterpart of this effect in striate cortex of the cat and monkey. Two hypotheses have been proposed: (1) Neurons with horizontal a...

Recently, the algebraic theory of MV -algebras is intensively studied. In this paper, we extend the concept of derivation of $MV$-algebras and we give someillustrative examples. Moreover, as a generalization of derivations of $MV$ -algebraswe introduce the notion of $f$-derivations and $(f; g)$-derivations of $MV$-algebras.Also, we investigate some properties of them.

This work aims to study of the stability of two generalizations of the functional equation f (pr,qs)+ f (ps,qr) = f (p,q) f (r,s) , namely (i) f (pr,qs)+g(ps,qr) = h(p,q)h(r,s) , and (ii) f (pr,qs)+ g(ps,qr) = h(p,q)k(r,s) for all p,q,r,s ∈ G , where G is a commutative semigroup. Thus this work is a continuation of our earlier works [15] and [16], and the functional equations studied here arise...

The bottom–up approach is considered a potential alternative for low cost manufacturing of nanostructured materials [1]. It is based on the concept of self–assembly of nanostructures on a substrate, and is emerging as an alternative paradigm for traditional top down fabrication used in the semiconductor industry. We demonstrate various strategies to control nanostructure assembly (both organic ...

Let F be a class of finite groups, p a prime and π a set of some primes. A finite group G is called a p-quasi-F-group (respectively, by π-quasi-F-group) provided that for every F-eccentric G-chief factor H/K of order divisible by p (respectively, by at least one prime in π), the automorphisms of H/K induced by all elements of G are inner. In this paper, we obtain the characterizations of p-quas...

http://jom.sagepub.com/content/early/2010/03/31/0149206310365902 The online version of this article can be found at: DOI: 10.1177/0149206310365902 published online 1 April 2010 Journal of Management Andrew Perkins Eden B. King, Whitney Botsford, Michelle R. Hebl, Stephanie Kazama, Jeremy F. Dawson and Challenging Developmental Experiences Benevolent Sexism at Work: Gender Differences in the Dis...

Recently, K.M.R. Audenaert (2010), and R.A. Horn and F. Zhang (2010) proved inequalities between the spectral radius of Hadamard products of finite nonnegative matrices and the spectral radius of their ordinary matrix product. We will prove these inequalities in such a way that they extend to infinite nonnegative matrices A and B that define bounded operators on the classical sequence spaces lp.

s of the 16th International Charles Heidelberger Symposium on Cancer Research Coimbra, Portugal. 26–28 September 2010 Edited by Ana M Urbano, A J Guiomar, Carlos F Oliveira, Isabel M Carreira and Maria C Alpoim Published: 24 September 2010 These abstracts are available online at http://www.biomedcentral.com/1753-6561/4?issue=S2

It is shown that a) it is possible to define the topology of any topological algebra by a collection of F -seminorms, b) every complete locally uniformly absorbent (complete locally A-pseudoconvex) Hausdorff algebra is topologically isomorphic to a projective limit of metrizable locally uniformly absorbent algebras (respectively, A-(k-normed) algebras, where k ∈ (0, 1] varies, c) every complete...