نتایج جستجو برای: s delta function

تعداد نتایج: 1874531  

Journal: :Mechanisms of Development 1997
Annette L. Parks Stacey S. Huppert Marc A.T. Muskavitch

We have examined expression of the neurogenic gene, Delta (Dl), and the regulatory relationships between the Delta-Notch signalling pathway and the proneural gene, achaete, during microchaeta development in Drosophila. Delta is expressed in all microchaeta proneural cells and microchaeta sensory organ precursors (SOPs) and is expressed dynamically in SOP progeny. We find that Delta expression i...

2010
Quanwen Lin Baoguo Jia Qiru Wang Allan C. Peterson

and Applied Analysis 3 exists, when σ t t here by s → t it is understood that s approaches t in the time scale and when x is continuous at t and σ t > t, xΔ t : x σ t − x t μ t . 1.7 Note that if T R, then the delta derivative is just the standard derivative, and when T Z the delta derivative is just the forward difference operator. Hence, our results contain the discrete and continuous cases a...

Journal: :Computers & Mathematics with Applications 2011
T. Krüger F. Varnik D. Raabe

The deformation of an initially spherical capsule, freely suspended in simple shear flow, can be computed analytically in the limit of small deformations [D. Barthés-Biesel, J.M. Rallison, The time-dependent deformation of a capsule freely suspended in a linear shear flow, J. Fluid Mech. 113 (1981) 251–267]. Those analytic approximations are used to study the influence of themesh tessellationme...

Journal: :Calculus of Variations and Partial Differential Equations 2021

In this work we introduce volume constraint problems involving the nonlocal operator $$(-\Delta )_{\delta }^{s}$$ , closely related to fractional Laplacian )^{s}$$ and depending upon a parameter $$\delta >0$$ called horizon. We study associated linear spectral behavior of these when \rightarrow 0^+$$ +\infty $$ . Through limit processes on derive convergence local as respectively, well prove so...

Journal: :Journal of the Optical Society of America. A, Optics, image science, and vision 2004
R M A Azzam

The absolute, average, and differential phase shifts that p- and s-polarized light experience in total internal reflection (TIR) at the planar interface between two transparent media are considered as functions of the angle of incidence phi. Special angles at which quarter-wave phase shifts are achieved are determined as functions of the relative refractive index N. When the average phase shift...

Journal: :Biophysical journal 1995
I Wuddel H J Apell

A charge-pulse technique was designed to measure charge movements in the Na-transport mode of the Na,K-ATPase in membrane fragments adsorbed to a planar lipid bilayer with high time resolution. 1) Na+ transport was measured as a function of membrane potential, and 2) voltage-dependent extracellular ion binding and release were analyzed as a function of Na+ concentration and membrane potential. ...

Journal: :Acta Applicandae Mathematicae 2021

We investigate here the following weighted degenerate elliptic system $$\begin{aligned} &-\Delta _{s} u =\Big(1+\|\mathbf{x}\|^{2(s+1)}\Big)^{ \frac{\alpha }{2(s+1)}} v^{p}, \quad -\Delta v= \Big(1+\| \mathbf{x}\|^{2(s+1)}\Big)^{\frac{\alpha }{2(s+1)}}u^{\theta }, \\ &\quad u,v>0 \mbox{in }\; \mathbb{R}^{N}:=\mathbb{R}^{N_{1}}\times \mathbb{R}^{N_{2}}, \end{aligned}$$ where $\Delta _{s}=\Delta ...

2010
Christopher P. Bickford David T. Hanson Nate G. McDowell

Mesophyll conductance to CO(2) (g(m)) limits carbon assimilation and influences carbon isotope discrimination (Delta) under most environmental conditions. Current work is elucidating the environmental regulation of g(m), but the influence of g(m) on model predictions of Delta remains poorly understood. In this study, field measurements of Delta and g(m) were obtained using a tunable diode laser...

Journal: :Genetics 2009
Christine M McDonald Marisa Wagner Maitreya J Dunham Marcus E Shin Noreen T Ahmed Edward Winter

Meiotic development (sporulation) in the yeast Saccharomyces cerevisiae is induced by nutritional deprivation. Smk1 is a meiosis-specific MAP kinase homolog that controls spore morphogenesis after the meiotic divisions have taken place. In this study, recessive mutants that suppress the sporulation defect of a smk1-2 temperature-sensitive hypomorph were isolated. The suppressors are partial fun...

Journal: :British journal of anaesthesia 2006
M Kakinohana S Nakamura T Fuchigami K J Davison M Marsala K Sugahara

BACKGROUND Intrathecal (IT) morphine given after a short interval of aortic occlusion in a rodent model induced transient spastic paraparesis via opioid receptor-predicted actions in spinal cord. To determine the role(s) of spinal opioid receptor subtypes we investigated whether IT administration of various selective opioid receptor agonists can induce paraparesis following a short period of sp...

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