Gabriel Wittum

78 papers A 1B 1C 1Journal 67Unranked 2

Year	Rank	Type	Title / Venue / Authors
2025	J	`jnl`	Estimation of uncertainties in the density driven flow in fractured porous media using MLMC. Eng. Comput. Dmitry Logashenko, Alexander Litvinenko, Raúl Tempone, Gabriel Wittum
2025	J	`jnl`	Modelling Human Skin Morphology and Simulating Transdermal Transport of 50 Chemicals. CoRR Milana Tesfamarian, Arne Nägel, Michael Heisig, Gabriel Wittum
2024	J	`jnl`	Estimation of uncertainties in the density driven flow in fractured porous media using MLMC. CoRR Dmitry Logashenko, Alexander Litvinenko, Raúl Tempone, Gabriel Wittum
2024	J	`jnl`	Uncertainty quantification in the Henry problem using the multilevel Monte Carlo method. CoRR Dmitry Logashenko, Alexander Litvinenko, Raúl Tempone, Ekaterina Vasilyeva, Gabriel Wittum
2024	J	`jnl`	Uncertainty quantification in the Henry problem using the multilevel Monte Carlo method. J. Comput. Phys. Dmitry Logashenko, Alexander Litvinenko, Raúl Tempone, Ekaterina Vasilyeva, Gabriel Wittum
2023	J	`jnl`	Uncertainty quantification in coastal aquifers using the multilevel Monte Carlo method. CoRR Alexander Litvinenko, Dmitry Logashenko, Raúl Tempone, Ekaterina Vasilyeva, Gabriel Wittum
2022	J	`jnl`	Influence of T-Bar on Calcium Concentration Impacting Release Probability. Frontiers Comput. Neurosci. Markus M. Knodel, Ranjita Dutta Roy, Gabriel Wittum
2021	J	`jnl`	A sharp interface method using enriched finite elements for elliptic interface problems. Numerische Mathematik Susanne Höllbacher, Gabriel Wittum
2021	J	`jnl`	Correction to: A sharp interface method using enriched finite elements for elliptic interface problems. Numerische Mathematik Susanne Höllbacher, Gabriel Wittum
2020	J	`jnl`	3d Modeling and simulation of a harpsichord. Comput. Vis. Sci. Lukas Larisch, Babett Lemke, Gabriel Wittum
2020	J	`jnl`	Automated methods for the comparison of natural languages. Comput. Vis. Sci. Gabriel Wittum, Michael Hoffer, Babett Lemke, Robert Jabs, Arne Nägel
2020	J	`jnl`	Gradient-consistent enrichment of finite element spaces for the DNS of fluid-particle interaction. J. Comput. Phys. Susanne Höllbacher, Gabriel Wittum
2020	J	`jnl`	Mesh generation for thin layered domains and its application to parallel multigrid simulation of groundwater flow. Comput. Vis. Sci. Sebastian Reiter, Dmitry Logashenko, Andreas Vogel, Gabriel Wittum
2020	J	`jnl`	Performance comparisons of geometric multigrid solvers and balancing domain decomposition solvers. Comput. Vis. Sci. Hongjie Zheng, Ryuji Shioya, Hiroshi Kawai, Sebastian Reiter, Gabriel Wittum
2019	J	`jnl`	Rotational test spaces for a fully-implicit FVM and FEM for the DNS of fluid-particle interaction. J. Comput. Phys. Susanne Höllbacher, Gabriel Wittum
2019	J	`jnl`	Solution of the 3D density-driven groundwater flow problem with uncertain porosity and permeability. CoRR Alexander Litvinenko, Dmitriy Logashenko, Raúl Tempone, Gabriel Wittum, David E. Keyes
2018	J	`jnl`	Virtual reality in advanced medical immersive imaging: a workflow for introducing virtual reality as a supporting tool in medical imaging. Comput. Vis. Sci. Markus M. Knodel, Babett Lemke, Michael Lampe, Michael Hoffer, Clarissa Gillmann, Michael Uder, Jens Hillengaß, Gabriel Wittum, Tobias Bäuerle
2016	—	`ch.`	Automated Performance Modeling of the UG4 Simulation Framework. Software for Exascale Computing Andreas Vogel, Alexandru Calotoiu, Arne Nägel, Sebastian Reiter, Alexandre Strube, Gabriel Wittum, Felix Wolf
2016	—	`ch.`	Automatic Performance Modeling of HPC Applications. Software for Exascale Computing Felix Wolf, Christian H. Bischof, Alexandru Calotoiu, Torsten Hoefler, Christian Iwainsky, Grzegorz Kwasniewski, Bernd Mohr, Sergei Shudler, Alexandre Strube, Andreas Vogel, Gabriel Wittum
2016	J	`jnl`	Numerical simulation of contaminant transport in groundwater using software tools of \(r^3t\). Comput. Vis. Sci. Peter Frolkovic, Michael Lampe, Gabriel Wittum
2016	—	`ch.`	Space and Time Parallel Multigrid for Optimization and Uncertainty Quantification in PDE Simulations. Software for Exascale Computing Lars Grasedyck, Christian Löbbert, Gabriel Wittum, Arne Nägel, Volker Schulz, Martin Siebenborn, Rolf Krause, Pietro Benedusi, Uwe Küster, Björn Dick
2015	—	`conf`	10, 000 Performance Models per Minute - Scalability of the UG4 Simulation Framework. Euro-Par Andreas Vogel, Alexandru Calotoiu, Alexandre Strube, Sebastian Reiter, Arne Nägel, Felix Wolf, Gabriel Wittum
2015	J	`jnl`	A three-dimensional mathematical model for the signal propagation on a neuron's membrane. Frontiers Comput. Neurosci. Konstantinos Xylouris, Gabriel Wittum
2015	J	`jnl`	Adaptive large eddy simulation. Comput. Vis. Sci. A. Hauser, Gabriel Wittum
2015	J	`jnl`	Editorial: Algorithmic requirements for HPC. Comput. Vis. Sci. Gabriel Wittum
2015	J	`jnl`	Multigrid analysis of spatially resolved hepatitis C virus protein simulations. Comput. Vis. Sci. Markus M. Knodel, Arne Nägel, Sebastian Reiter, Martin Rupp, Andreas Vogel, Paul Targett-Adams, Eva Herrmann, Gabriel Wittum
2015	J	`jnl`	Numerical simulation of skin transport using Parareal. Comput. Vis. Sci. Andreas Kreienbuehl, Arne Nägel, Daniel Ruprecht, Robert Speck, Gabriel Wittum, Rolf Krause
2015	J	`jnl`	Numerical simulation of skin transport using Parareal. CoRR Andreas Kreienbuehl, Arne Nägel, Daniel Ruprecht, Robert Speck, Gabriel Wittum, Rolf Krause
2015	J	`jnl`	Parallel tensor sampling in the hierarchical Tucker format. Comput. Vis. Sci. Lars Grasedyck, Ronald Kriemann, Christian Löbbert, Arne Nägel, Gabriel Wittum, Konstantinos Xylouris
2015	J	`jnl`	Parareal convergence for 2D unsteady flow around a cylinder. CoRR Andreas Kreienbuehl, Arne Nägel, Daniel Ruprecht, Andreas Vogel, Gabriel Wittum, Rolf Krause
2015	J	`jnl`	Scalable shape optimization methods for structured inverse modeling in 3D diffusive processes. Comput. Vis. Sci. Arne Nägel, Volker Schulz, Martin Siebenborn, Gabriel Wittum
2015	J	`jnl`	Utilization of empirically determined energy-optimal CPU-frequencies in a numerical simulation code. Comput. Vis. Sci. Björn Dick, Andreas Vogel, Dmitry Khabi, Martin Rupp, Uwe Küster, Gabriel Wittum
2014	—	`conf`	Catwalk: A Quick Development Path for Performance Models. Euro-Par Workshops (2) Felix Wolf, Christian H. Bischof, Torsten Hoefler, Bernd Mohr, Gabriel Wittum, Alexandru Calotoiu, Christian Iwainsky, Alexandre Strube, Andreas Vogel
2014	J	`jnl`	Models and simulations of variable-density flow in fractured porous media. Int. J. Comput. Sci. Eng. Sebastian Reiter, Dmitriy Logashenko, Sabine Stichel, Gabriel Wittum, Alfio Grillo
2014	J	`jnl`	Synaptic bouton properties are tuned to best fit the prevailing firing pattern. Frontiers Comput. Neurosci. Markus M. Knodel, Romina Geiger, Lihao Ge, Daniel Bucher, Alfio Grillo, Gabriel Wittum, Christoph Schuster, Gillian Queisser
2013	J	`jnl`	A massively parallel geometric multigrid solver on hierarchically distributed grids. Comput. Vis. Sci. Sebastian Reiter, Andreas Vogel, Ingo Heppner, Martin Rupp, Gabriel Wittum
2013	J	`jnl`	Editorial. Comput. Vis. Sci. Gabriel Wittum
2013	J	`jnl`	Visual reflection library: a framework for declarative GUI programming on the Java platform. Comput. Vis. Sci. Michael Hoffer, Christian Poliwoda, Gabriel Wittum
2012	—	`ed.`	Competence in High Performance Computing 2010 - Proceedings of an International Conference on Competence in High Performance Computing, Schloss Schwetzingen, Germany, June 2010. CHPC Christian H. Bischof, Heinz-Gerd Hegering, Wolfgang E. Nagel, Gabriel Wittum
2012	J	`jnl`	Convergence and optimality of adaptive edge finite element methods for time-harmonic Maxwell equations. Math. Comput. Liuqiang Zhong, Long Chen, Shi Shu, Gabriel Wittum, Jinchao Xu
2012	J	`jnl`	Editorial. Comput. Vis. Sci. Gabriel Wittum
2012	J	`jnl`	Forchheimer's correction in modelling flow and transport in fractured porous media. Comput. Vis. Sci. Alfio Grillo, Dmitriy Logashenko, Sabine Stichel, Gabriel Wittum
2012	J	`jnl`	Preparation of grids for simulations of groundwater flow in fractured porous media. Comput. Vis. Sci. Sebastian Reiter, Dmitriy Logashenko, Alfio Grillo, Gabriel Wittum
2011	J	`jnl`	A method to investigate the diffusion properties of nuclear calcium. Biol. Cybern. Gillian Queisser, Gabriel Wittum
2011	J	`jnl`	Finite dose skin penetration: a comparison of concentration-depth profiles from experiment and simulation. Comput. Vis. Sci. Arne Nägel, Tsambika Hahn, Ulrich F. Schäfer, Claus-Michael Lehr, Michael Heisig, Gabriel Wittum
2011	J	`jnl`	Inertia based filtering of high resolution images using a GPU cluster. Comput. Vis. Sci. Daniel Jungblut, Gillian Queisser, Gabriel Wittum
2010	J	`jnl`	A generalization of the vertex-centered finite volume scheme to arbitrary high order. Comput. Vis. Sci. Andreas Vogel, Jinchao Xu, Gabriel Wittum
2010	J	`jnl`	A three-dimensional mathematical model of active signal processing in axons. Comput. Vis. Sci. Konstantinos Xylouris, Gillian Queisser, Gabriel Wittum
2010	J	`jnl`	Coarse Graining on Arbitrary Grids. Multiscale Model. Simul. Ivo Muha, Sabine Stichel, Sabine Attinger, Gabriel Wittum
2010	J	`jnl`	Editorial. Comput. Vis. Sci. Gabriel Wittum
2010	J	`jnl`	Editorial. Comput. Vis. Sci. Gabriel Wittum
2010	—	`ch.`	Software Framework UG: Parallel Simulation of a Three-Dimensional Benchmark Problem for Thermohaline-Driven Flow. High Performance Computing in Science and Engineering Michael Lampe, Alfio Grillo, Gabriel Wittum
2010	J	`jnl`	Three-dimensional simulation of the thermohaline-driven buoyancy of a brine parcel. Comput. Vis. Sci. Alfio Grillo, Michael Lampe, Gabriel Wittum
2009	A	`conf`	Calculation of default probability (PD) solving Merton Model PDEs on sparse grids. IPDPS Philipp Schroeder, Gabriel Wittum
2009	B	`conf`	Efficient multigrid solver for the 3D random walker algorithm. Image Processing Xin Wang, Tobias Heimann, Arne Nägel, Gabriel Wittum, Hans-Peter Meinzer
2009	J	`jnl`	Scalable Heuristic Algorithms for the Parallel Execution of Data Flow Acyclic Digraphs. SIAM J. Sci. Comput. Zeyao Mo, Aiqing Zhang, Gabriel Wittum
2009	J	`jnl`	The Tree-Edit-Distance, a Measure for Quantifying Neuronal Morphology. Neuroinformatics Holger Heumann, Gabriel Wittum
2008	J	`jnl`	IBLU decompositions based on Padé approximants. Numer. Linear Algebra Appl. A. Buzdin, Dmitriy Logashenko, Gabriel Wittum
2008	J	`jnl`	Numerical upscaling for the eddy-current model with stochastic magnetic materials. J. Comput. Phys. Jens P. Eberhard, Dan Popovic, Gabriel Wittum
2007	J	`jnl`	Efficient Hierarchical Approximation of High-Dimensional Option Pricing Problems. SIAM J. Sci. Comput. Christoph Reisinger, Gabriel Wittum
2007	J	`jnl`	Low Machnumber aeroacoustics - A direct one-grid approach. J. Num. Math. Achim Gordner, Gabriel Wittum
2007	J	`jnl`	On the influence of different stabilisation methods for the incompressible Navier-Stokes equations. J. Comput. Phys. Sandra Nägele, Gabriel Wittum
2006	J	`jnl`	NeuGen: A tool for the generation of realistic morphology of cortical neurons and neural networks in 3D. Neurocomputing Jens P. Eberhard, Alexander Wanner, Gabriel Wittum
2006	C	`conf`	Nonlinear anisotropic diffusion filtering of three-dimensional image data from two-photon microscopy. Image Processing: Algorithms and Systems Philip Julian Broser, Roland Schulte, Arnd Roth, Fritjof Helmchen, Jack Waters, Stefan Lang, Bert J. Sakmann, Gabriel Wittum
2005	J	`jnl`	Large-scale density-driven flow simulations using parallel unstructured Grid adaptation and local multigrid methods. Concurr. Pract. Exp. Stefan Lang, Gabriel Wittum
2004	J	`jnl`	Coarse Graining for Upscaling of Flow in Heterogeneous Porous Media. Multiscale Model. Simul. Jens P. Eberhard, Sabine Attinger, Gabriel Wittum
2004	—	`book`	Numerical Solution of Elliptic Differential Equations by Reduction to the Interface. Boris N. Khoromskij, Gabriel Wittum
2004	J	`jnl`	Parallel adaptive multigrid algorithm for 2-d 3-t diffusion equations. Int. J. Comput. Math. Zeyao Mo, Longjun Shen, Gabriel Wittum
2004	J	`jnl`	Two-frequency decomposition. Numerische Mathematik A. Buzdin, Gabriel Wittum
2001	J	`jnl`	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. Wolfgang Hoffmann, Alfred H. Schatz, Lars B. Wahlbin, Gabriel Wittum
2001	J	`jnl`	Homogenization and Multigrid. Computing Nicolas Neuss, Willi Jäger, Gabriel Wittum
1999	J	`jnl`	An asymptotically optimal Schur complement reduction for the Stokes equation. Numerische Mathematik Boris N. Khoromskij, Gabriel Wittum
1999	J	`jnl`	Frequency Filtering for Elliptic Interface Problems with Lagrange Multipliers. SIAM J. Sci. Comput. Boris N. Khoromskij, G. E. Mazurkevich, Gabriel Wittum
1999	J	`jnl`	Robust Schur complement method for strongly anisotropic elliptic equations. Numer. Linear Algebra Appl. Boris N. Khoromskij, Gabriel Wittum
1998	J	`jnl`	Additive and Multiplicative Multi-Grid - A Comparison. Computing Peter Bastian, Wolfgang Hackbusch, Gabriel Wittum
1997	J	`jnl`	Parallel Frequency Filtering. Computing W. Weiler, Gabriel Wittum
1992	J	`jnl`	A multigrid method for the computation of eigenmodes of closed water basins. IMPACT Comput. Sci. Eng. Stefan A. Sauter, Gabriel Wittum
1989	J	`jnl`	Linear iterations as smoothers in multigrid methods: Theory with applications to incomplete decompositions. IMPACT Comput. Sci. Eng. Gabriel Wittum