G
Gabriel Wittum
Researcher at Goethe University Frankfurt
Publications - 208
Citations - 3832
Gabriel Wittum is an academic researcher from Goethe University Frankfurt. The author has contributed to research in topics: Multigrid method & Discretization. The author has an hindex of 33, co-authored 202 publications receiving 3604 citations. Previous affiliations of Gabriel Wittum include Interdisciplinary Center for Scientific Computing & King Abdullah University of Science and Technology.
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On the Robustness of ILU Smoothing
TL;DR: In the present paper, a detailed analysis of a multigrid method with an ILU smoother applied to a singularly perturbed problem is given, and a variant of the usual incomplete LU factorization is introduced, which is especially suited as robust smoother.
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Multi-grid methods for stokes and navier-stokes equations
TL;DR: In this paper, the authors introduce transforming iterations, an approach to construct smoothers for indefinite systems, which turns out to be a convenient tool to classify several well-known smoothing iterations for Stokes and Navier-Stokes equations and to predict their convergence behavior.
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Synaptic Activity Induces Dramatic Changes in the Geometry of the Cell Nucleus: Interplay between Nuclear Structure, Histone H3 Phosphorylation, and Nuclear Calcium Signaling
Malte Wittmann,Gillian Queisser,A. Eder,J. S. Wiegert,C. P. Bengtson,Andrea Hellwig,Gabriel Wittum,Hilmar Bading +7 more
TL;DR: The translation of synaptic activity-induced signaling events into changes in nuclear geometry facilitates the relay of calcium signals to the nucleus, may lead to the formation of nuclear signaling microdomains, and could enhance signal-regulated transcription.
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The saltpool benchmark problem – numerical simulation of saltwater upconing in a porous medium
TL;DR: In this paper, the sensitivity of the model with respect to model parameters is investigated and the definition of the mathematical benchmark problem is defined. But the sensitivity is not investigated in this paper.
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Non steady-state descriptions of drug permeation through stratum corneum. I. The biphasic brick-and-mortar model.
TL;DR: The model SC-membrane predicts, from purely morphological principles, lag times and permeabilities that are in good agreement with experimental values andCorneocyte/lipid partitioning is found to be fundamentally different to SC/donor partitioning, since increasing drug lipophilicity always reduces both lag time and permeability.