Gabriel Wittum

Publication Activity (10 Years)

Years Active: 1989-2024
Publications (10 Years): 16

Top Topics

Hepatitis C Virus

Mathematical Models

Monte Carlo Method

Top Venues

Comput. Vis. Sci.

J. Comput. Phys.

Frontiers Comput. Neurosci.

Publications

Dmitry Logashenko, Alexander Litvinenko, Raúl Tempone, Ekaterina Vasilyeva, Gabriel Wittum
Uncertainty quantification in the Henry problem using the multilevel Monte Carlo method. CoRR (2024)
Dmitry Logashenko, Alexander Litvinenko, Raúl Tempone, Ekaterina Vasilyeva, Gabriel Wittum
Uncertainty quantification in the Henry problem using the multilevel Monte Carlo method. J. Comput. Phys. 503 (2024)
Dmitry Logashenko, Alexander Litvinenko, Raúl Tempone, Gabriel Wittum
Estimation of uncertainties in the density driven flow in fractured porous media using MLMC. CoRR (2024)
Alexander Litvinenko, Dmitry Logashenko, Raúl Tempone, Ekaterina Vasilyeva, Gabriel Wittum
Uncertainty quantification in coastal aquifers using the multilevel Monte Carlo method. CoRR (2023)
Markus M. Knodel, Ranjita Dutta Roy, Gabriel Wittum
Influence of T-Bar on Calcium Concentration Impacting Release Probability. Frontiers Comput. Neurosci. 16 (2022)
Susanne Höllbacher, Gabriel Wittum
Correction to: A sharp interface method using enriched finite elements for elliptic interface problems. Numerische Mathematik 147 (4) (2021)
Susanne Höllbacher, Gabriel Wittum
A sharp interface method using enriched finite elements for elliptic interface problems. Numerische Mathematik 147 (4) (2021)
Susanne Höllbacher, Gabriel Wittum
Gradient-consistent enrichment of finite element spaces for the DNS of fluid-particle interaction. J. Comput. Phys. 401 (2020)
Lukas Larisch, Babett Lemke, Gabriel Wittum
3d Modeling and simulation of a harpsichord. Comput. Vis. Sci. 23 (1) (2020)
Hongjie Zheng, Ryuji Shioya, Hiroshi Kawai, Sebastian Reiter, Gabriel Wittum
Performance comparisons of geometric multigrid solvers and balancing domain decomposition solvers. Comput. Vis. Sci. 23 (1) (2020)
Sebastian Reiter, Dmitry Logashenko, Andreas Vogel, Gabriel Wittum
Mesh generation for thin layered domains and its application to parallel multigrid simulation of groundwater flow. Comput. Vis. Sci. 23 (1) (2020)
Gabriel Wittum, Michael Hoffer, Babett Lemke, Robert Jabs, Arne Nägel
Automated methods for the comparison of natural languages. Comput. Vis. Sci. 23 (1) (2020)
Alexander Litvinenko, Dmitriy Logashenko, Raúl Tempone, Gabriel Wittum, David E. Keyes
Solution of the 3D density-driven groundwater flow problem with uncertain porosity and permeability. CoRR (2019)
Susanne Höllbacher, Gabriel Wittum
Rotational test spaces for a fully-implicit FVM and FEM for the DNS of fluid-particle interaction. J. Comput. Phys. 393 (2019)
Markus M. Knodel, Babett Lemke, Michael Lampe, Michael Hoffer, Clarissa Gillmann, Michael Uder, Jens Hillengaß, Gabriel Wittum, Tobias Bäuerle
Virtual reality in advanced medical immersive imaging: a workflow for introducing virtual reality as a supporting tool in medical imaging. Comput. Vis. Sci. 18 (6) (2018)
Peter Frolkovic, Michael Lampe, Gabriel Wittum
Numerical simulation of contaminant transport in groundwater using software tools of \(r^3t\). Comput. Vis. Sci. 18 (1) (2016)
A. Hauser, Gabriel Wittum
Adaptive large eddy simulation. Comput. Vis. Sci. 17 (6) (2015)
Konstantinos Xylouris, Gabriel Wittum
A three-dimensional mathematical model for the signal propagation on a neuron's membrane. Frontiers Comput. Neurosci. 9 (2015)
Arne Nägel, Volker Schulz, Martin Siebenborn, Gabriel Wittum
Scalable shape optimization methods for structured inverse modeling in 3D diffusive processes. Comput. Vis. Sci. 17 (2) (2015)
Andreas Kreienbuehl, Arne Nägel, Daniel Ruprecht, Andreas Vogel, Gabriel Wittum, Rolf Krause
Parareal convergence for 2D unsteady flow around a cylinder. CoRR (2015)
Markus M. Knodel, Arne Nägel, Sebastian Reiter, Martin Rupp, Andreas Vogel, Paul Targett-Adams, Eva Herrmann, Gabriel Wittum
Multigrid analysis of spatially resolved hepatitis C virus protein simulations. Comput. Vis. Sci. 17 (5) (2015)
Andreas Vogel, Alexandru Calotoiu, Alexandre Strube, Sebastian Reiter, Arne Nägel, Felix Wolf, Gabriel Wittum
10, 000 Performance Models per Minute - Scalability of the UG4 Simulation Framework. Euro-Par (2015)
Björn Dick, Andreas Vogel, Dmitry Khabi, Martin Rupp, Uwe Küster, Gabriel Wittum
Utilization of empirically determined energy-optimal CPU-frequencies in a numerical simulation code. Comput. Vis. Sci. 17 (2) (2015)
Gabriel Wittum
Editorial: Algorithmic requirements for HPC. Comput. Vis. Sci. 17 (2) (2015)
Andreas Kreienbuehl, Arne Nägel, Daniel Ruprecht, Robert Speck, Gabriel Wittum, Rolf Krause
Numerical simulation of skin transport using Parareal. CoRR (2015)
Andreas Kreienbuehl, Arne Nägel, Daniel Ruprecht, Robert Speck, Gabriel Wittum, Rolf Krause
Numerical simulation of skin transport using Parareal. Comput. Vis. Sci. 17 (2) (2015)
Lars Grasedyck, Ronald Kriemann, Christian Löbbert, Arne Nägel, Gabriel Wittum, Konstantinos Xylouris
Parallel tensor sampling in the hierarchical Tucker format. Comput. Vis. Sci. 17 (2) (2015)
Felix Wolf, Christian H. Bischof, Torsten Hoefler, Bernd Mohr, Gabriel Wittum, Alexandru Calotoiu, Christian Iwainsky, Alexandre Strube, Andreas Vogel
Catwalk: A Quick Development Path for Performance Models. Euro-Par Workshops (2) (2014)
Sebastian Reiter, Dmitriy Logashenko, Sabine Stichel, Gabriel Wittum, Alfio Grillo
Models and simulations of variable-density flow in fractured porous media. Int. J. Comput. Sci. Eng. 9 (5/6) (2014)
Markus M. Knodel, Romina Geiger, Lihao Ge, Daniel Bucher, Alfio Grillo, Gabriel Wittum, Christoph Schuster, Gillian Queisser
Synaptic bouton properties are tuned to best fit the prevailing firing pattern. Frontiers Comput. Neurosci. 8 (2014)
Gabriel Wittum
Editorial. Comput. Vis. Sci. 16 (5) (2013)
Sebastian Reiter, Andreas Vogel, Ingo Heppner, Martin Rupp, Gabriel Wittum
A massively parallel geometric multigrid solver on hierarchically distributed grids. Comput. Vis. Sci. 16 (4) (2013)
Andreas Vogel, Sebastian Reiter, Martin Rupp, Arne Nägel, Gabriel Wittum
4: A novel flexible software system for simulating PDE based models on high performance computers. Comput. Vis. Sci. 16 (4) (2013)
Michael Hoffer, Christian Poliwoda, Gabriel Wittum
Visual reflection library: a framework for declarative GUI programming on the Java platform. Comput. Vis. Sci. 16 (4) (2013)
Alfio Grillo, Dmitriy Logashenko, Sabine Stichel, Gabriel Wittum
Forchheimer's correction in modelling flow and transport in fractured porous media. Comput. Vis. Sci. 15 (4) (2012)
Liuqiang Zhong, Long Chen, Shi Shu, Gabriel Wittum, Jinchao Xu
Convergence and optimality of adaptive edge finite element methods for time-harmonic Maxwell equations. Math. Comput. 81 (278) (2012)
Gabriel Wittum
Editorial. Comput. Vis. Sci. 15 (1) (2012)
Sebastian Reiter, Dmitriy Logashenko, Alfio Grillo, Gabriel Wittum
Preparation of grids for simulations of groundwater flow in fractured porous media. Comput. Vis. Sci. 15 (4) (2012)
Gillian Queisser, Gabriel Wittum
A method to investigate the diffusion properties of nuclear calcium. Biol. Cybern. 105 (3-4) (2011)
Arne Nägel, Tsambika Hahn, Ulrich F. Schäfer, Claus-Michael Lehr, Michael Heisig, Gabriel Wittum
Finite dose skin penetration: a comparison of concentration-depth profiles from experiment and simulation. Comput. Vis. Sci. 14 (7) (2011)
Daniel Jungblut, Gillian Queisser, Gabriel Wittum
Inertia based filtering of high resolution images using a GPU cluster. Comput. Vis. Sci. 14 (4) (2011)
Konstantinos Xylouris, Gillian Queisser, Gabriel Wittum
A three-dimensional mathematical model of active signal processing in axons. Comput. Vis. Sci. 13 (8) (2010)
Ivo Muha, Sabine Stichel, Sabine Attinger, Gabriel Wittum
Coarse Graining on Arbitrary Grids. Multiscale Model. Simul. 8 (4) (2010)
Alfio Grillo, Michael Lampe, Gabriel Wittum
Three-dimensional simulation of the thermohaline-driven buoyancy of a brine parcel. Comput. Vis. Sci. 13 (6) (2010)
Gabriel Wittum
Editorial. Comput. Vis. Sci. 13 (4) (2010)
Gabriel Wittum
Editorial. Comput. Vis. Sci. 13 (6) (2010)
Andreas Vogel, Jinchao Xu, Gabriel Wittum
A generalization of the vertex-centered finite volume scheme to arbitrary high order. Comput. Vis. Sci. 13 (5) (2010)
Philipp Schroeder, Gabriel Wittum
Calculation of default probability (PD) solving Merton Model PDEs on sparse grids. IPDPS (2009)
Xin Wang, Tobias Heimann, Arne Nägel, Gabriel Wittum, Hans-Peter Meinzer
Efficient multigrid solver for the 3D random walker algorithm. Medical Imaging: Image Processing (2009)
Zeyao Mo, Aiqing Zhang, Gabriel Wittum
Scalable Heuristic Algorithms for the Parallel Execution of Data Flow Acyclic Digraphs. SIAM J. Sci. Comput. 31 (5) (2009)
Holger Heumann, Gabriel Wittum
The Tree-Edit-Distance, a Measure for Quantifying Neuronal Morphology. Neuroinformatics 7 (3) (2009)
A. Buzdin, Dmitriy Logashenko, Gabriel Wittum
IBLU decompositions based on Padé approximants. Numer. Linear Algebra Appl. 15 (8) (2008)
Jens P. Eberhard, Dan Popovic, Gabriel Wittum
Numerical upscaling for the eddy-current model with stochastic magnetic materials. J. Comput. Phys. 227 (8) (2008)
Sandra Nägele, Gabriel Wittum
On the influence of different stabilisation methods for the incompressible Navier-Stokes equations. J. Comput. Phys. 224 (1) (2007)
Achim Gordner, Gabriel Wittum
Low Machnumber aeroacoustics - A direct one-grid approach. J. Num. Math. 15 (1) (2007)
Christoph Reisinger, Gabriel Wittum
Efficient Hierarchical Approximation of High-Dimensional Option Pricing Problems. SIAM J. Sci. Comput. 29 (1) (2007)
Jens P. Eberhard, Alexander Wanner, Gabriel Wittum
NeuGen: A tool for the generation of realistic morphology of cortical neurons and neural networks in 3D. Neurocomputing 70 (1-3) (2006)
Philip Julian Broser, Roland Schulte, Arnd Roth, Fritjof Helmchen, Jack Waters, Stefan Lang, Bert J. Sakmann, Gabriel Wittum
Nonlinear anisotropic diffusion filtering of three-dimensional image data from two-photon microscopy. Image Processing: Algorithms and Systems (2006)
Stefan Lang, Gabriel Wittum
Large-scale density-driven flow simulations using parallel unstructured Grid adaptation and local multigrid methods. Concurr. Pract. Exp. 17 (11) (2005)
Jens P. Eberhard, Sabine Attinger, Gabriel Wittum
Coarse Graining for Upscaling of Flow in Heterogeneous Porous Media. Multiscale Model. Simul. 2 (2) (2004)
A. Buzdin, Gabriel Wittum
Two-frequency decomposition. Numerische Mathematik 97 (2) (2004)
Zeyao Mo, Longjun Shen, Gabriel Wittum
Parallel adaptive multigrid algorithm for 2-d 3-t diffusion equations. Int. J. Comput. Math. 81 (3) (2004)
Nicolas Neuss, Willi Jäger, Gabriel Wittum
Homogenization and Multigrid. Computing 66 (1) (2001)
Wolfgang Hoffmann, Alfred H. Schatz, Lars B. Wahlbin, Gabriel Wittum
Asymptotically exact a posteriori estimators for the pointwise gradient error on each element in irregular meshes. Part 1: A smooth problem and globally quasi-uniform meshes. Math. Comput. 70 (235) (2001)
Boris N. Khoromskij, G. E. Mazurkevich, Gabriel Wittum
Frequency Filtering for Elliptic Interface Problems with Lagrange Multipliers. SIAM J. Sci. Comput. 21 (2) (1999)
Boris N. Khoromskij, Gabriel Wittum
An asymptotically optimal Schur complement reduction for the Stokes equation. Numerische Mathematik 81 (3) (1999)
Boris N. Khoromskij, Gabriel Wittum
Robust Schur complement method for strongly anisotropic elliptic equations. Numer. Linear Algebra Appl. 6 (8) (1999)
Peter Bastian, Wolfgang Hackbusch, Gabriel Wittum
Additive and Multiplicative Multi-Grid - A Comparison. Computing 60 (4) (1998)
W. Weiler, Gabriel Wittum
Parallel Frequency Filtering. Computing 58 (4) (1997)
Stefan A. Sauter, Gabriel Wittum
A multigrid method for the computation of eigenmodes of closed water basins. IMPACT Comput. Sci. Eng. 4 (2) (1992)
Gabriel Wittum
Linear iterations as smoothers in multigrid methods: Theory with applications to incomplete decompositions. IMPACT Comput. Sci. Eng. 1 (2) (1989)