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Gabriel Wittum
Person information
- affiliation: King Abdullah University of Science and Technology (KAUST), Saudi Arabia
- affiliation (former): Goethe University Frankfurt am Main, Germany
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2020 – today
- 2024
- [j60]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: 112854 (2024) - [i6]Dmitry Logashenko, Alexander Litvinenko, Raúl Tempone, Ekaterina Vasilyeva, Gabriel Wittum:
Uncertainty quantification in the Henry problem using the multilevel Monte Carlo method. CoRR abs/2403.17018 (2024) - [i5]Dmitry Logashenko, Alexander Litvinenko, Raúl Tempone, Gabriel Wittum:
Estimation of uncertainties in the density driven flow in fractured porous media using MLMC. CoRR abs/2404.18003 (2024) - 2023
- [i4]Alexander Litvinenko, Dmitry Logashenko
, Raúl Tempone, Ekaterina Vasilyeva, Gabriel Wittum:
Uncertainty quantification in coastal aquifers using the multilevel Monte Carlo method. CoRR abs/2302.07804 (2023) - 2022
- [j59]Markus M. Knodel, Ranjita Dutta Roy, Gabriel Wittum:
Influence of T-Bar on Calcium Concentration Impacting Release Probability. Frontiers Comput. Neurosci. 16: 855746 (2022) - 2021
- [j58]Susanne Höllbacher, Gabriel Wittum:
A sharp interface method using enriched finite elements for elliptic interface problems. Numerische Mathematik 147(4): 759-781 (2021) - [j57]Susanne Höllbacher, Gabriel Wittum:
Correction to: A sharp interface method using enriched finite elements for elliptic interface problems. Numerische Mathematik 147(4): 783 (2021) - 2020
- [j56]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): 2 (2020) - [j55]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): 5 (2020) - [j54]Lukas Larisch, Babett Lemke, Gabriel Wittum:
3d Modeling and simulation of a harpsichord. Comput. Vis. Sci. 23(1): 6 (2020) - [j53]Gabriel Wittum, Michael Hoffer, Babett Lemke, Robert Jabs, Arne Nägel
:
Automated methods for the comparison of natural languages. Comput. Vis. Sci. 23(1): 7 (2020) - [j52]Susanne Höllbacher, Gabriel Wittum:
Gradient-consistent enrichment of finite element spaces for the DNS of fluid-particle interaction. J. Comput. Phys. 401 (2020)
2010 – 2019
- 2019
- [j51]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: 186-213 (2019) - [i3]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 abs/1906.01632 (2019) - 2018
- [j50]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): 203-212 (2018) - 2016
- [j49]Peter Frolkovic
, Michael Lampe, Gabriel Wittum:
Numerical simulation of contaminant transport in groundwater using software tools of \(r^3t\). Comput. Vis. Sci. 18(1): 17-29 (2016) - [p4]Felix Wolf, Christian H. Bischof, Alexandru Calotoiu, Torsten Hoefler, Christian Iwainsky, Grzegorz Kwasniewski, Bernd Mohr
, Sergei Shudler
, Alexandre Strube
, Andreas Vogel
, Gabriel Wittum:
Automatic Performance Modeling of HPC Applications. Software for Exascale Computing 2016: 445-465 - [p3]Andreas Vogel
, Alexandru Calotoiu, Arne Nägel
, Sebastian Reiter, Alexandre Strube
, Gabriel Wittum, Felix Wolf:
Automated Performance Modeling of the UG4 Simulation Framework. Software for Exascale Computing 2016: 467-481 - [p2]Lars Grasedyck, Christian Löbbert, Gabriel Wittum, Arne Nägel
, Volker Schulz
, Martin Siebenborn, Rolf Krause
, Pietro Benedusi, Uwe Küster, Björn Dick:
Space and Time Parallel Multigrid for Optimization and Uncertainty Quantification in PDE Simulations. Software for Exascale Computing 2016: 507-523 - 2015
- [j48]Gabriel Wittum:
Editorial: Algorithmic requirements for HPC. Comput. Vis. Sci. 17(2): 65-66 (2015) - [j47]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): 67-78 (2015) - [j46]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): 79-88 (2015) - [j45]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): 89-97 (2015) - [j44]Andreas Kreienbuehl, Arne Nägel
, Daniel Ruprecht
, Robert Speck
, Gabriel Wittum, Rolf Krause
:
Numerical simulation of skin transport using Parareal. Comput. Vis. Sci. 17(2): 99-108 (2015) - [j43]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): 235-253 (2015) - [j42]A. Hauser, Gabriel Wittum:
Adaptive large eddy simulation. Comput. Vis. Sci. 17(6): 295-304 (2015) - [j41]Konstantinos Xylouris, Gabriel Wittum:
A three-dimensional mathematical model for the signal propagation on a neuron's membrane. Frontiers Comput. Neurosci. 9: 94 (2015) - [c5]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: 519-531 - [i2]Andreas Kreienbuehl, Arne Nägel, Daniel Ruprecht, Robert Speck, Gabriel Wittum, Rolf Krause:
Numerical simulation of skin transport using Parareal. CoRR abs/1502.03645 (2015) - [i1]Andreas Kreienbuehl, Arne Nägel, Daniel Ruprecht, Andreas Vogel, Gabriel Wittum, Rolf Krause:
Parareal convergence for 2D unsteady flow around a cylinder. CoRR abs/1509.04252 (2015) - 2014
- [j40]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: 101 (2014) - [j39]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): 416-432 (2014) - [c4]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: 589-600 - 2013
- [j38]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): 151-164 (2013) - [j37]Andreas Vogel
, Sebastian Reiter, Martin Rupp, Arne Nägel
, Gabriel Wittum:
UG 4: A novel flexible software system for simulating PDE based models on high performance computers. Comput. Vis. Sci. 16(4): 165-179 (2013) - [j36]Michael Hoffer, Christian Poliwoda, Gabriel Wittum:
Visual reflection library: a framework for declarative GUI programming on the Java platform. Comput. Vis. Sci. 16(4): 181-192 (2013) - [j35]Gabriel Wittum:
Editorial. Comput. Vis. Sci. 16(5): 193 (2013) - 2012
- [j34]Gabriel Wittum:
Editorial. Comput. Vis. Sci. 15(1): 1 (2012) - [j33]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): 169-190 (2012) - [j32]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): 209-225 (2012) - [j31]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): 623-642 (2012) - [e1]Christian H. Bischof, Heinz-Gerd Hegering, Wolfgang E. Nagel, Gabriel Wittum:
Competence in High Performance Computing 2010 - Proceedings of an International Conference on Competence in High Performance Computing, Schloss Schwetzingen, Germany, June 2010. Springer 2012, ISBN 978-3-642-24024-9 [contents] - 2011
- [j30]Gillian Queisser, Gabriel Wittum:
A method to investigate the diffusion properties of nuclear calcium. Biol. Cybern. 105(3-4): 211-216 (2011) - [j29]Daniel Jungblut, Gillian Queisser, Gabriel Wittum:
Inertia based filtering of high resolution images using a GPU cluster. Comput. Vis. Sci. 14(4): 181-186 (2011) - [j28]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): 327-339 (2011) - 2010
- [j27]Gabriel Wittum:
Editorial. Comput. Vis. Sci. 13(4): 145 (2010) - [j26]Andreas Vogel
, Jinchao Xu, Gabriel Wittum:
A generalization of the vertex-centered finite volume scheme to arbitrary high order. Comput. Vis. Sci. 13(5): 221-228 (2010) - [j25]Gabriel Wittum:
Editorial. Comput. Vis. Sci. 13(6): 247 (2010) - [j24]Alfio Grillo, Michael Lampe, Gabriel Wittum:
Three-dimensional simulation of the thermohaline-driven buoyancy of a brine parcel. Comput. Vis. Sci. 13(6): 287-297 (2010) - [j23]Konstantinos Xylouris, Gillian Queisser, Gabriel Wittum:
A three-dimensional mathematical model of active signal processing in axons. Comput. Vis. Sci. 13(8): 409-418 (2010) - [j22]Ivo Muha, Sabine Stichel, Sabine Attinger, Gabriel Wittum:
Coarse Graining on Arbitrary Grids. Multiscale Model. Simul. 8(4): 1368-1382 (2010) - [p1]Michael Lampe, Alfio Grillo, Gabriel Wittum:
Software Framework UG: Parallel Simulation of a Three-Dimensional Benchmark Problem for Thermohaline-Driven Flow. High Performance Computing in Science and Engineering 2010: 553-560
2000 – 2009
- 2009
- [j21]Holger Heumann, Gabriel Wittum:
The Tree-Edit-Distance, a Measure for Quantifying Neuronal Morphology. Neuroinformatics 7(3): 179-190 (2009) - [j20]Zeyao Mo, Aiqing Zhang, Gabriel Wittum:
Scalable Heuristic Algorithms for the Parallel Execution of Data Flow Acyclic Digraphs. SIAM J. Sci. Comput. 31(5): 3626-3642 (2009) - [c3]Philipp Schroeder, Gabriel Wittum:
Calculation of default probability (PD) solving Merton Model PDEs on sparse grids. IPDPS 2009: 1-6 - [c2]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: 72593R - 2008
- [j19]Jens P. Eberhard, Dan Popovic, Gabriel Wittum:
Numerical upscaling for the eddy-current model with stochastic magnetic materials. J. Comput. Phys. 227(8): 4244-4259 (2008) - [j18]A. Buzdin, Dmitriy Logashenko
, Gabriel Wittum:
IBLU decompositions based on Padé approximants. Numer. Linear Algebra Appl. 15(8): 717-746 (2008) - 2007
- [j17]Sandra Nägele, Gabriel Wittum:
On the influence of different stabilisation methods for the incompressible Navier-Stokes equations. J. Comput. Phys. 224(1): 100-116 (2007) - [j16]Achim Gordner, Gabriel Wittum:
Low Machnumber aeroacoustics - A direct one-grid approach. J. Num. Math. 15(1): 7-29 (2007) - [j15]Christoph Reisinger
, Gabriel Wittum:
Efficient Hierarchical Approximation of High-Dimensional Option Pricing Problems. SIAM J. Sci. Comput. 29(1): 440-458 (2007) - 2006
- [j14]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): 327-342 (2006) - [c1]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: 44-69 - 2005
- [j13]Stefan Lang, Gabriel Wittum:
Large-scale density-driven flow simulations using parallel unstructured Grid adaptation and local multigrid methods. Concurr. Pract. Exp. 17(11): 1415-1440 (2005) - 2004
- [b1]Boris N. Khoromskij, Gabriel Wittum:
Numerical Solution of Elliptic Differential Equations by Reduction to the Interface. Lecture Notes in Computational Science and Engineering 36, Springer 2004, ISBN 978-3-540-20406-0, pp. I-XI, 1-299 - [j12]Zeyao Mo, Longjun Shen, Gabriel Wittum:
Parallel adaptive multigrid algorithm for 2-d 3-t diffusion equations. Int. J. Comput. Math. 81(3): 361-374 (2004) - [j11]Jens P. Eberhard, Sabine Attinger, Gabriel Wittum:
Coarse Graining for Upscaling of Flow in Heterogeneous Porous Media. Multiscale Model. Simul. 2(2): 269-301 (2004) - [j10]A. Buzdin, Gabriel Wittum:
Two-frequency decomposition. Numerische Mathematik 97(2): 269-295 (2004) - 2001
- [j9]Nicolas Neuss
, Willi Jäger, Gabriel Wittum:
Homogenization and Multigrid. Computing 66(1): 1-26 (2001) - [j8]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): 897-909 (2001)
1990 – 1999
- 1999
- [j7]Boris N. Khoromskij, Gabriel Wittum:
Robust Schur complement method for strongly anisotropic elliptic equations. Numer. Linear Algebra Appl. 6(8): 621-653 (1999) - [j6]Boris N. Khoromskij, Gabriel Wittum:
An asymptotically optimal Schur complement reduction for the Stokes equation. Numerische Mathematik 81(3): 345-375 (1999) - [j5]Boris N. Khoromskij, G. E. Mazurkevich, Gabriel Wittum:
Frequency Filtering for Elliptic Interface Problems with Lagrange Multipliers. SIAM J. Sci. Comput. 21(2): 421-440 (1999) - 1998
- [j4]Peter Bastian, Wolfgang Hackbusch, Gabriel Wittum:
Additive and Multiplicative Multi-Grid - A Comparison. Computing 60(4): 345-364 (1998) - 1997
- [j3]W. Weiler, Gabriel Wittum:
Parallel Frequency Filtering. Computing 58(4): 303-316 (1997) - 1992
- [j2]Stefan A. Sauter, Gabriel Wittum:
A multigrid method for the computation of eigenmodes of closed water basins. IMPACT Comput. Sci. Eng. 4(2): 124-152 (1992)
1980 – 1989
- 1989
- [j1]Gabriel Wittum:
Linear iterations as smoothers in multigrid methods: Theory with applications to incomplete decompositions. IMPACT Comput. Sci. Eng. 1(2): 180-215 (1989)
Coauthor Index
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