in this paper we introduce two symmetric variants of amenability, symmetric module amenability and symmetric connes amenability. we determine symmetric module amenability and symmetric connes amenability of some concrete banach algebras. indeed, it is shown that $ell^1(s)$ is  a symmetric $ell^1(e)$-module amenable if and only if $s$ is amenable, where $s$ is an inverse semigroup with subsemigr...

As a sequel to a recent work we consider the generalized stress concentration factor, a purely geometric property of a body that for the various loadings, indicates the ratio between the maximum of the optimal stress and maximum of the loading fields. The optimal stress concentration factor pertains to a stress field that satisfies the principle of virtual work and for which the stress concentr...

To improve understanding of structural coupling and deformation patterns throughout the loaded ribcage, the present study reports the force-displacement and kinematic responses under a highly-localized loading condition using three PMHS ribcages (ages 44, 61, and 63 years). The ribcages were quasi-statically loaded locally to a non-failure displacement (nominally 15% of the ribcage depth at the...

1. Abstract In the present paper, some symmetry results for optimal solutions in structural optimization have been proposed and proven. It is found that under some invariant assumptions, for many structural optimization problems that can be formulated as quasi-convex programs, there exists at least one symmetric global optimal solution if the prescribed loading and support conditions are symmet...

This study describes the synthesis of five novel C2-symmetric organocatalysts that facilitate the on-water asymmetric aldol reaction at low catalyst loading (1 mol%) without the use of additives. Each catalyst is composed of two diprolinamide units joined by a symmetric alkyl bridging group allowing for systematic modulation of catalytic site proximity. Typically, catalysts in this manuscript w...

The problem of minimizing the induced currents on an axially symmetric body by impedance loading is formulated by means of the Lorentz reciprocity ,,.^’ / ( ‘\ i. .,_. theorem. The currents in the gap where the tangential electric field is non-vanishing are carefully defined anli critically examined from the view point of field :heory.

Symmetric mathematical programming is used to analyze the optimality of balancing workloads t~ maximize the expected production in a single-serve~closed queuing network model of a flexible manufacturing system (FMS). In particular, using generalized concavity we prove that, even though the production function is not concave, balancing workloads maximizes the expected production in certain types...

A physical description of the flow mechanisms that govern distribution wall-pressure fluctuations over surface a serrated trailing edge is proposed. Three main define variation turbulent pressure across are discussed and semi-empirical models formulated accordingly. It shown intensity increases at tips under effect an increased convective velocity as result sidewise momentum diffusion. Furtherm...

We have investigated the communication between subunits in replication factor C (RFC) from Archaeoglobus fulgidus. Mutation of the proposed arginine finger in the small subunits results in a complex that can still bind ATP but has impaired clamp-loading activity, a process that normally only requires binding of nucleotide. The small subunit alone forms a hexameric ring that is six-fold symmetri...