In this work, we analyze a recently proposed stabilized finite element formulation for the approximation of the resistive magnetohydrodynamics equations. The novelty of this formulation with respect to existing ones is the fact that it always converges to the physical solution, even when it is singular. We have performed a detailed stability and convergence analysis of the formulation in a simp...

A natural mixed-element approach for the Stokes equations in the velocity-pressure formulation would approximate the velocity by continuous piecewise-polynomials and would approximate the pressure by discontinuous piecewise-polynomials of one degree lower. However, many such elements are unstable in 2D and 3D. This paper is devoted to proving that the mixed finite elements of this Pk-Pk−1 type ...

This study focused on the contribution of micromechanical parameters on the macro-mechanical response of short fiber composites, namely polypropylene matrix reinforced by glass fibers. In the framework of this paper, an attention has been given to the glass fibers length, as micromechanical parameter influences the overall macroscopic material’s behavior. Three dimensional numerical models were...

Based on a particular node ordering and corresponding block decomposition of the matrix we analyse an e cient, algebraic multilevel preconditioner for the iterative solution of nite element discretizations of elliptic boundary value problems. Thereby an analysis of a new version of block-factorization preconditioning methods is presented. The approximate factorization requires an approximation ...

In this study, impacts of different element absence (nitrogen, sulfur, phosphorus and magnesium) and supplementation (nitrogen and zinc) on element uptake and triacylglycerol production was followed in wild type Chlamydomonas reinhardtii CC-124 strain. Macro- and microelement composition of C. reinhardtii greatly differed under element regimes studied. In particular, heavy metal quotas of the m...

Der Beitrag stellt auf Basis einer ersten empirischen Untersuchung den Status Quo des Geschäftsprozessmanagements (GPM) in der kommunalen Wirtschaftsförderung dar. Obwohl GPM in der öffentlichen Verwaltung ein Instrument von wachsender Bedeutung darstellt, wurde der Bereich kommunaler Selbstverwaltung hierzu bislang wissenschaftlich nicht evaluiert. Die vorliegende qualitative Voruntersuchung b...

In this paper we show how the abstract behaviours of higherorder systems can be modelled as final coalgebras of suitable behavioural functors. These functors have the challenging peculiarity to be circularly defined with their own final coalgebra. Our main contribution is a general construction for defining these functors, solving this circularity which is the essence of higher-order behaviours...

SUMMARY We present a new solution to the tree drawing problem that integrates an excellent tree drawing algorithm into one of the best text processing systems available. More precisely, we present a T E X macro package called TreeT E X that produces drawings of trees from a purely logical description. Our approach has three advantages: labels for nodes can be handled in a reasonable way; portin...

Nanomaterials are particles with 10 to100 nanometer size. They can easily be transportedthrough the skin, lung alveoli, and placenta. Materials in nano scales show different propertiescompared with the same materials in macro or larger scale. It is found that zinc element is anessential metal for normal physiological functions. However increase or decrease of this elementduring pregnancy, for e...