نتایج جستجو برای: sigma frame
تعداد نتایج: 124220 فیلتر نتایج به سال:
Burkholderia cenocepacia mutants that fail to produce the siderophore ornibactin were obtained following mutagenesis with mini-Tn5Tp. These mutants were shown to be growth restricted under conditions of iron depletion. In eight of the mutants, the transposon had integrated into one of two genes, orbI and orbJ, encoding nonribosomal peptide synthetases. In the other mutant, the transposon had in...
Sigma-ligands comprise several chemically unrelated drugs such as haloperidol, pentazocine, and ditolylguanidine, which bind to a family of low molecular mass proteins in the endoplasmic reticulum. These so-called sigma-receptors are believed to mediate various pharmacological effects of sigma-ligands by as yet unknown mechanisms. Based on their opposite enantioselectivity for benzomorphans and...
Let $R$ be a ring, $sigma$ be an endomorphism of $R$ and $M_R$ be a $sigma$-rigid module. A module $M_R$ is called quasi-Baer if the right annihilator of a principal submodule of $R$ is generated by an idempotent. It is shown that an $R$-module $M_R$ is a quasi-Baer module if and only if $M[[x]]$ is a quasi-Baer module over the skew power series ring $R[[x,sigma]]$.
This work applies 64,765 simulated seismic ground motions to four models each of 6or 20-story, steel special moment-resisting frame buildings. We consider two vector intensity measures and categorize the building response as “collapsed,” “unrepairable,” or “repairable.” We then propose regression models to predict the building responses from the intensity measures. The best models for “collapse...
Urban expansion has significant effects on forest loss and fragmentation. Previous studies mostly focused on how the amount of developed land affected forest loss and fragmentation, but neglected the impacts of its spatial pattern. This paper examines the effects of both the amount and spatial pattern of urban expansion on forest loss and fragmentation. We conducted a comparison study in the si...
Introduction: The competitive condition of the world is such that the organizations make quality improvement, increase customers' satisfaction, reduce costs and increase productivity. Existence of such environment cause the variety technique and approaches such as total quality management, re-engineering, value engineering, lean production and Six Sigma. Six Sigma as the newest program of quali...
Intrudaction: Conspicuous achievements of organization with minimum facilities on one hand and failure of organizations with materialist abilities on the other hand have been shown the considerable role of factors including non-materialist and spiritual in their success. Organizational culture would be considered as an effective factor in organization performance. correlation of organization's ...
Background: Clinical application of the test results are profoundly influenced by laboratory errors. Nowadays, the best way to evaluate the performance of a method is to determine its sigma scale according to total allowable error (TEa) and analytical errors, including random and systematic errors. In this study, the performance of the measuring kits for biochemical analytes belonging to Pars A...
We examine various properties of double field theory and the doubled string sigma model in context geometric quantisation. In particular we look at T-duality as symplectic transformation related to an alternative choice polarisation construction quantum bundle for string. Following this perspective adopt a variety techniques from quantisation study space. One application is coherent state that ...
In this note we will show that the so called Sobolev dual is the minimizer over all linear reconstructions using dual frames for stable r order Σ∆ quantization schemes under the so called White Noise Hypothesis (WNH) design criteria. We compute some Sobolev duals for common frames and apply them to audio clips to test their performance against canonical duals and another alternate dual correspo...
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