The most efficient solvers for finite element (fe) equations are certainly multigrid, or multilevel methods, and domain decomposition methods using local multigrid solvers. Typically, the multigrid convergence rate is independent of the mesh size parameter, and the arithmetical complexity grows linearly with the number of unknowns. However, the standard multigrid algorithms fail for the Maxwell...

This paper considers the problem of vector tomography on an arbitrary bounded domain in three dimensions. Previous work has given the formulas for the reconstructed scalar and vector potential functions in relation to the vector eld values inside the domain and on the boundary of the domain. Using these formulas, It is shown in this work that the curl-free component can be reconstructed using o...

We prove the L-differentiability at almost every point for convolution products on R of the form K ∗ μ, where μ is bounded measure and the kernel K is homogeneous of degree 1 − d. From this result we derive the Ldifferentiability for vector fields on R whose curl and divergence are measures, and also for vector fields with bounded deformation.

In this paper, we present a technique to analyze variation of structural curl with temperature due to residual stress gradients in multilayer CMOS microstructures. Analytic equations verified by finite element analysis (FEA) and experiment are used as a basis for a FEA technique to predict residual stress dependent curl in an arbitrary device. A parameter extraction method based on measurement ...

More than 50 years ago, microtubule depolymerization was proposed as the force responsible for chromosome movement. New studies measure the force produced by depolymerization and show that protein ring complexes can couple depolymerization to movement. These results have implications for anaphase chromosome motility and mitotic evolution.

Introducción: Los beneficios del entrenamiento de fuerza sobre la velocidad carrera han sido descritos en bibliografía especializada, sin embargo, evidencia influencia estímulos específicos, basados contracciones excéntricas musculatura extensora cadera, no demostrados. Objetivo: Determinar los efectos un protocolo basado (curl nórdico) 20 metros adolescentes región Ñuble, Chile. Metodología: 4...

Curl and truncated spiral antennas are studied for input impedance matching a coaxial line. Each antenna is located at quarter wavelengths above the ground plane analyzed using moment method. It found that curl shows voltage standing wave ratio (VSWR) of less than two in 3-dB axial bandwidth 30% crank feedline with an unbalanced feed. also has 24%, where VSWR remains parallel feedlines quasi-ba...

In this paper, we consider the div-curl problem posed on nonconvex polyhedral domains. We propose a least-squares method based on discontinuous elements with normal and tangential continuity across interior faces, as well as boundary conditions, weakly enforced through a properly designed least-squares functional. Discontinuous elements make it possible to take advantage of regularity of given ...