0000000000617717

AUTHOR

A. R. Mitchell

showing 2 related works from this author

Centromere-Like Elements in Megaselia Spiracularis (Diptera: Phoridae): A Fine-Structure and Cytogenetic Study

2004

The present study was concerned with the karyotype of a humpbacked fly, Megaselia spiracularis (Diptera: Phoridae). Chromosome preparations of neuroblasts isolated from male and female pupae uniformly showed two pairs of metacentric chromosomes and a telocentric chromosome pair. All chromosomes were homomorphic. The analysis of ultrathin serial sections through spermatogonia in metaphase using transmission electron microscopy, confirmed the presence of 3 regular chromosome pairs. In ultrathin sections, the centromeres could be detected as individual elements owing to their lesser electron density in comparison with the chromosome arms. In addition, the spindles contained two tiny elements s…

GeneticsChromosome pairbiologyfungiChromosomeKaryotypeGeneral Medicinebiology.organism_classificationMegaselia spiracularisGenusCentromereGeneticsMetaphasePhoridaeHereditas
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Finite element approximation of vector fields given by curl and divergence

1981

In this paper a finite element approximation scheme for the system curl is considered. The use of pointwise approximation of the boundary condition leads to a nonconforming method. The error estimate is proved and numerically tested.

PointwiseCurl (mathematics)Vector operatorApproximation errorGeneral MathematicsMathematical analysisGeneral EngineeringMixed finite element methodComplex lamellar vector fieldMathematicsVector potentialExtended finite element methodMathematical Methods in the Applied Sciences
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