Omar Ghattas - RankMe

137 papers A* 4A 18Misc 5Journal 104Unranked 5

Year	Rank	Type	Title / Venue / Authors
2026	J	`jnl`	Accelerating High-Order Finite Element Simulations at Extreme Scale with FP64 Tensor Cores. CoRR Jiqun Tu, Ian Karlin, John Camier, Veselin Dobrev, Tzanio V. Kolev, Stefan Henneking, Omar Ghattas
2026	J	`jnl`	Goal-oriented real-time Bayesian inference for linear autonomous dynamical systems with application to digital twins for tsunami early warning. J. Comput. Phys. Stefan Henneking, Sreeram Venkat, Omar Ghattas
2026	J	`jnl`	LazyDINO: Fast, Scalable, and Efficiently Amortized Bayesian Inversion via Structure-Exploiting and Surrogate-Driven Measure Transport. J. Mach. Learn. Res. Lianghao Cao, Joshua Chen, Michael Brennan, Thomas O'Leary-Roseberry, Youssef Marzouk, Omar Ghattas
2026	J	`jnl`	Real-time probabilistic tsunami forecasting in Cascadia from sparse offshore pressure observations. CoRR Stefan Henneking, Fabian Kutschera, Sreeram Venkat, Alice-Agnes Gabriel, Omar Ghattas
2026	J	`jnl`	Shape Derivative-Informed Neural Operators with Application to Risk-Averse Shape Optimization. CoRR Xindi Gong, Dingcheng Luo, Thomas O'Leary-Roseberry, Ruanui Nicholson, Omar Ghattas
2026	J	`jnl`	Tucker Tensor Train Taylor Series. CoRR Nick Alger, Blake Christierson, Peng Chen, Omar Ghattas
2025	J	`jnl`	Accelerating seismic inversion and uncertainty quantification with efficient high-rank Hessian approximations. CoRR Mathew Hu, Nick Alger, Rami Nammour, Omar Ghattas
2025	J	`jnl`	Derivative-Informed Fourier Neural Operator: Universal Approximation and Applications to PDE-Constrained Optimization. CoRR Boyuan Yao, Dingcheng Luo, Lianghao Cao, Nikola B. Kovachki, Thomas O'Leary-Roseberry, Omar Ghattas
2025	J	`jnl`	Derivative-Informed Neural Operator Acceleration of Geometric MCMC for Infinite-Dimensional Bayesian Inverse Problems. J. Mach. Learn. Res. Lianghao Cao, Thomas O'Leary-Roseberry, Omar Ghattas
2025	J	`jnl`	Dimension reduction for derivative-informed operator learning: An analysis of approximation errors. CoRR Dingcheng Luo, Thomas O'Leary-Roseberry, Peng Chen, Omar Ghattas
2025	J	`jnl`	Efficient PDE-Constrained Optimization Under High-Dimensional Uncertainty Using Derivative-Informed Neural Operators. SIAM J. Sci. Comput. Dingcheng Luo, Thomas O'Leary-Roseberry, Peng Chen, Omar Ghattas
2025	J	`jnl`	Fast and Scalable FFT-Based GPU-Accelerated Algorithms for Block-Triangular Toeplitz Matrices with Application to Linear Inverse Problems Governed by Autonomous Dynamical Systems. SIAM J. Sci. Comput. Sreeram Venkat, Milinda Fernando, Stefan Henneking, Omar Ghattas
2025	J	`jnl`	Goal-Oriented Real-Time Bayesian Inference for Linear Autonomous Dynamical Systems With Application to Digital Twins for Tsunami Early Warning. CoRR Stefan Henneking, Sreeram Venkat, Omar Ghattas
2025	—	`conf`	Mixed-Precision Performance Portability of FFT-Based GPU-Accelerated Algorithms for Block-Triangular Toeplitz Matrices. SC Workshops Sreeram Venkat, Kasia Swirydowicz, Noah Wolfe, Omar Ghattas
2025	J	`jnl`	Mixed-Precision Performance Portability of FFT-Based GPU-Accelerated Algorithms for Block-Triangular Toeplitz Matrices. CoRR Sreeram Venkat, Kasia Swirydowicz, Noah Wolfe, Omar Ghattas
2025	A	`conf`	Real-Time Bayesian Inference at Extreme Scale: A Digital Twin for Tsunami Early Warning Applied to the Cascadia Subduction Zone. SC Stefan Henneking, Sreeram Venkat, Veselin Dobrev, John Camier, Tzanio V. Kolev, Milinda Fernando, Alice-Agnes Gabriel, Omar Ghattas
2025	J	`jnl`	Real-time Bayesian inference at extreme scale: A digital twin for tsunami early warning applied to the Cascadia subduction zone. CoRR Stefan Henneking, Sreeram Venkat, Veselin Dobrev, John Camier, Tzanio V. Kolev, Milinda Fernando, Alice-Agnes Gabriel, Omar Ghattas
2024	J	`jnl`	Bayesian model calibration for block copolymer self-assembly: Likelihood-free inference and expected information gain computation via measure transport. J. Comput. Phys. Ricardo Baptista, Lianghao Cao, Joshua Chen, Omar Ghattas, Fengyi Li, Youssef M. Marzouk, J. Tinsley Oden
2024	J	`jnl`	Derivative-Informed Neural Operator: An efficient framework for high-dimensional parametric derivative learning. J. Comput. Phys. Thomas O'Leary-Roseberry, Peng Chen, Umberto Villa, Omar Ghattas
2024	J	`jnl`	Efficient geometric Markov chain Monte Carlo for nonlinear Bayesian inversion enabled by derivative-informed neural operators. CoRR Lianghao Cao, Thomas O'Leary-Roseberry, Omar Ghattas
2024	J	`jnl`	Fast and Scalable FFT-Based GPU-Accelerated Algorithms for Hessian Actions Arising in Linear Inverse Problems Governed by Autonomous Dynamical Systems. CoRR Sreeram Venkat, Milinda Fernando, Stefan Henneking, Omar Ghattas
2024	J	`jnl`	Gaussian mixture Taylor approximations of risk measures constrained by PDEs with Gaussian random field inputs. CoRR Dingcheng Luo, Joshua Chen, Peng Chen, Omar Ghattas
2024	J	`jnl`	Inference of Heterogeneous Material Properties via Infinite-Dimensional Integrated DIC. CoRR Joseph Kirchhoff, Dingcheng Luo, Thomas O'Leary-Roseberry, Omar Ghattas
2024	J	`jnl`	LazyDINO: Fast, scalable, and efficiently amortized Bayesian inversion via structure-exploiting and surrogate-driven measure transport. CoRR Lianghao Cao, Joshua Chen, Michael Brennan, Thomas O'Leary-Roseberry, Youssef M. Marzouk, Omar Ghattas
2024	J	`jnl`	Point Spread Function Approximation of High-Rank Hessians with Locally Supported Nonnegative Integral Kernels. SIAM J. Sci. Comput. Nick Alger, Tucker Hartland, Noemi Petra, Omar Ghattas
2024	J	`jnl`	Real-time aerodynamic load estimation for hypersonics via strain-based inverse maps. CoRR Julie Pham, Omar Ghattas, Noel Clemens, Karen Willcox
2024	J	`jnl`	SOUPy: Stochastic PDE-constrained optimization under high-dimensional uncertainty in Python. J. Open Source Softw. Dingcheng Luo, Peng Chen, Thomas O'Leary-Roseberry, Umberto Villa, Omar Ghattas
2023	J	`jnl`	A Fast and Scalable Computational Framework for Large-Scale High-Dimensional Bayesian Optimal Experimental Design. SIAM/ASA J. Uncertain. Quantification Keyi Wu, Peng Chen, Omar Ghattas
2023	J	`jnl`	An Offline-Online Decomposition Method for Efficient Linear Bayesian Goal-Oriented Optimal Experimental Design: Application to Optimal Sensor Placement. SIAM J. Sci. Comput. Keyi Wu, Peng Chen, Omar Ghattas
2023	J	`jnl`	Bayesian model calibration for diblock copolymer thin film self-assembly using power spectrum of microscopy data. CoRR Lianghao Cao, Keyi Wu, J. Tinsley Oden, Peng Chen, Omar Ghattas
2023	J	`jnl`	Efficient PDE-Constrained optimization under high-dimensional uncertainty using derivative-informed neural operators. CoRR Dingcheng Luo, Thomas O'Leary-Roseberry, Peng Chen, Omar Ghattas
2023	J	`jnl`	Interior over-penalized enriched Galerkin methods for second order elliptic equations. Comput. Math. Appl. Jeonghun J. Lee, Omar Ghattas
2023	J	`jnl`	Large-Scale Bayesian Optimal Experimental Design with Derivative-Informed Projected Neural Network. J. Sci. Comput. Keyi Wu, Thomas O'Leary-Roseberry, Peng Chen, Omar Ghattas
2023	J	`jnl`	Optimal design of chemoepitaxial guideposts for the directed self-assembly of block copolymer systems using an inexact Newton algorithm. J. Comput. Phys. Dingcheng Luo, Lianghao Cao, Peng Chen, Omar Ghattas, J. Tinsley Oden
2023	J	`jnl`	Point spread function approximation of high rank Hessians with locally supported non-negative integral kernels. CoRR Nick Alger, Tucker Hartland, Noemi Petra, Omar Ghattas
2023	J	`jnl`	Residual-based error correction for neural operator accelerated infinite-dimensional Bayesian inverse problems. J. Comput. Phys. Lianghao Cao, Thomas O'Leary-Roseberry, Prashant K. Jha, J. Tinsley Oden, Omar Ghattas
2023	J	`jnl`	hIPPYlib-MUQ: A Bayesian Inference Software Framework for Integration of Data with Complex Predictive Models under Uncertainty. ACM Trans. Math. Softw. Ki-Tae Kim, Umberto Villa, Matthew D. Parno, Youssef M. Marzouk, Omar Ghattas, Noemi Petra
2022	A	`conf`	A GPU-Accelerated AMR Solver for Gravitational Wave Propagation. SC Milinda Fernando, David Neilsen, Eric W. Hirschmann, Yosef Zlochower, Hari Sundar, Omar Ghattas, George Biros
2022	J	`jnl`	A Globally Convergent Modified Newton Method for the Direct Minimization of the Ohta-Kawasaki Energy with Application to the Directed Self-Assembly of Diblock Copolymers. SIAM J. Sci. Comput. Lianghao Cao, Omar Ghattas, J. Tinsley Oden
2022	J	`jnl`	A stochastic Stein Variational Newton method. CoRR Alex Leviyev, Joshua Chen, Yifei Wang, Omar Ghattas, Aaron Zimmerman
2022	J	`jnl`	Derivative-Informed Neural Operator: An Efficient Framework for High-Dimensional Parametric Derivative Learning. CoRR Thomas O'Leary-Roseberry, Peng Chen, Umberto Villa, Omar Ghattas
2022	J	`jnl`	Derivative-informed projected neural network for large-scale Bayesian optimal experimental design. CoRR Keyi Wu, Thomas O'Leary-Roseberry, Peng Chen, Omar Ghattas
2022	J	`jnl`	Forward and inverse modeling of fault transmissibility in subsurface flows. Comput. Math. Appl. Jeonghun J. Lee, Tan Bui-Thanh, Umberto Villa, Omar Ghattas
2022	J	`jnl`	Interior over-stabilized enriched Galerkin methods for second order elliptic equations. CoRR Jeonghun J. Lee, Omar Ghattas
2022	J	`jnl`	Optimal design of chemoepitaxial guideposts for directed self-assembly of block copolymer systems using an inexact-Newton algorithm. CoRR Dingcheng Luo, Lianghao Cao, Peng Chen, Omar Ghattas, J. Tinsley Oden
2022	J	`jnl`	Residual-based error correction for neural operator accelerated infinite-dimensional Bayesian inverse problems. CoRR Lianghao Cao, Thomas O'Leary-Roseberry, Prashant K. Jha, J. Tinsley Oden, Omar Ghattas
2021	J	`jnl`	A fast and scalable computational framework for goal-oriented linear Bayesian optimal experimental design: Application to optimal sensor placement. CoRR Keyi Wu, Peng Chen, Omar Ghattas
2021	J	`jnl`	Adaptive Projected Residual Networks for Learning Parametric Maps from Sparse Data. CoRR Thomas O'Leary-Roseberry, Xiaosong Du, Anirban Chaudhuri, Joaquim R. R. A. Martins, Karen Willcox, Omar Ghattas
2021	J	`jnl`	Bayesian Poroelastic Aquifer Characterization from InSAR Surface Deformation Data Part II: Quantifying the Uncertainty. CoRR Amal Alghamdi, Marc Andre Hesse, Jingyi Chen, Umberto Villa, Omar Ghattas
2021	J	`jnl`	Learning physics-based models from data: perspectives from inverse problems and model reduction. Acta Numer. Omar Ghattas, Karen Willcox
2021	J	`jnl`	Optimal design of acoustic metamaterial cloaks under uncertainty. J. Comput. Phys. Peng Chen, Michael R. Haberman, Omar Ghattas
2021	J	`jnl`	Stein Variational Reduced Basis Bayesian Inversion. SIAM J. Sci. Comput. Peng Chen, Omar Ghattas
2021	J	`jnl`	Taylor Approximation for Chance Constrained Optimization Problems Governed by Partial Differential Equations with High-Dimensional Random Parameters. SIAM/ASA J. Uncertain. Quantification Peng Chen, Omar Ghattas
2021	J	`jnl`	The imperative of physics-based modeling and inverse theory in computational science. Nat. Comput. Sci. Karen E. Willcox, Omar Ghattas, Patrick Heimbach
2021	J	`jnl`	hIPPYlib-MUQ: A Bayesian Inference Software Framework for Integration of Data with Complex Predictive Models under Uncertainty. CoRR Ki-Tae Kim, Umberto Villa, Matthew D. Parno, Youssef M. Marzouk, Omar Ghattas, Noemi Petra
2021	J	`jnl`	hIPPYlib: An Extensible Software Framework for Large-Scale Inverse Problems Governed by PDEs: Part I: Deterministic Inversion and Linearized Bayesian Inference. ACM Trans. Math. Softw. Umberto Villa, Noemi Petra, Omar Ghattas
2020	J	`jnl`	A fast and scalable computational framework for large-scale and high-dimensional Bayesian optimal experimental design. CoRR Keyi Wu, Peng Chen, Omar Ghattas
2020	J	`jnl`	A globally convergent modified Newton method for the direct minimization of the Ohta-Kawasaki energy with application to the directed self-assembly of diblock copolymers. CoRR Lianghao Cao, Omar Ghattas, J. Tinsley Oden
2020	J	`jnl`	Bayesian Poroelastic Aquifer Characterization from InSAR Surface Deformation Data. Part I: Maximum A Posteriori Estimate. CoRR Amal Alghamdi, Marc Andre Hesse, Jingyi Chen, Omar Ghattas
2020	J	`jnl`	Derivative-Informed Projected Neural Networks for High-Dimensional Parametric Maps Governed by PDEs. CoRR Thomas O'Leary-Roseberry, Umberto Villa, Peng Chen, Omar Ghattas
2020	J	`jnl`	Energy-conserving 3D elastic wave simulation with finite difference discretization on staggered grids with nonconforming interfaces. CoRR Longfei Gao, Omar Ghattas, David E. Keyes
2020	—	`conf`	Frontera: The Evolution of Leadership Computing at the National Science Foundation. PEARC Dan Stanzione, John West, R. Todd Evans, Tommy Minyard, Omar Ghattas, Dhabaleswar K. Panda
2020	J	`jnl`	Hierarchical Matrix Approximations of Hessians Arising in Inverse Problems Governed by PDEs. CoRR Ilona Ambartsumyan, Wajih Bou Karam, Tan Bui-Thanh, Omar Ghattas, David E. Keyes, Georg Stadler, George Turkiyyah, Stefano Zampini
2020	J	`jnl`	Hierarchical Matrix Approximations of Hessians Arising in Inverse Problems Governed by PDEs. SIAM J. Sci. Comput. Ilona Ambartsumyan, Wajih Halim Boukaram, Tan Bui-Thanh, Omar Ghattas, David E. Keyes, Georg Stadler, George Turkiyyah, Stefano Zampini
2020	J	`jnl`	Ill-Posedness and Optimization Geometry for Nonlinear Neural Network Training. CoRR Thomas O'Leary-Roseberry, Omar Ghattas
2020	J	`jnl`	Low Rank Saddle Free Newton: Algorithm and Analysis. CoRR Thomas O'Leary-Roseberry, Nick Alger, Omar Ghattas
2020	A*	`conf`	Projected Stein Variational Gradient Descent. NeurIPS Peng Chen, Omar Ghattas
2020	J	`jnl`	Projected Stein Variational Gradient Descent. CoRR Peng Chen, Omar Ghattas
2020	J	`jnl`	Stein variational reduced basis Bayesian inversion. CoRR Peng Chen, Omar Ghattas
2020	J	`jnl`	Tensor Train Construction From Tensor Actions, With Application to Compression of Large High Order Derivative Tensors. SIAM J. Sci. Comput. Nick Alger, Peng Chen, Omar Ghattas
2020	J	`jnl`	Tensor train construction from tensor actions, with application to compression of large high order derivative tensors. CoRR Nick Alger, Peng Chen, Omar Ghattas
2019	A*	`conf`	Disentangled behavioural representations. NeurIPS Amir Dezfouli, Hassan Ashtiani, Omar Ghattas, Richard Nock, Peter Dayan, Cheng Soon Ong
2019	A*	`conf`	Projected Stein Variational Newton: A Fast and Scalable Bayesian Inference Method in High Dimensions. NeurIPS Peng Chen, Keyi Wu, Joshua Chen, Tom O'Leary-Roseberry, Omar Ghattas
2019	J	`jnl`	Scalable Matrix-Free Adaptive Product-Convolution Approximation for Locally Translation-Invariant Operators. SIAM J. Sci. Comput. Nick Alger, Vishwas Rao, Aaron Myers, Tan Bui-Thanh, Omar Ghattas
2019	J	`jnl`	Taylor approximation and variance reduction for PDE-constrained optimal control under uncertainty. J. Comput. Phys. Peng Chen, Umberto Villa, Omar Ghattas
2019	J	`jnl`	hIPPYlib: An Extensible Software Framework for Large-Scale Inverse Problems Governed by PDEs; Part I: Deterministic Inversion and Linearized Bayesian Inference. CoRR Umberto Villa, Noemi Petra, Omar Ghattas
2018	J	`jnl`	A Randomized Maximum A Posteriori Method for Posterior Sampling of High Dimensional Nonlinear Bayesian Inverse Problems. SIAM J. Sci. Comput. Kainan Wang, Tan Bui-Thanh, Omar Ghattas
2018	J	`jnl`	hIPPYlib: An Extensible Software Framework for Large-Scale Inverse Problems. J. Open Source Softw. Umberto Villa, Noemi Petra, Omar Ghattas
2017	J	`jnl`	A Data Scalable Augmented Lagrangian KKT Preconditioner for Large-Scale Inverse Problems. SIAM J. Sci. Comput. Nick Alger, Umberto Villa, Tan Bui-Thanh, Omar Ghattas
2017	J	`jnl`	Mean-Variance Risk-Averse Optimal Control of Systems Governed by PDEs with Random Parameter Fields Using Quadratic Approximations. SIAM/ASA J. Uncertain. Quantification Alen Alexanderian, Noemi Petra, Georg Stadler, Omar Ghattas
2017	J	`jnl`	Weighted BFBT Preconditioner for Stokes Flow Problems with Highly Heterogeneous Viscosity. SIAM J. Sci. Comput. Johann Rudi, Georg Stadler, Omar Ghattas
2016	J	`jnl`	A Fast and Scalable Method for A-Optimal Design of Experiments for Infinite-dimensional Bayesian Nonlinear Inverse Problems. SIAM J. Sci. Comput. Alen Alexanderian, Noemi Petra, Georg Stadler, Omar Ghattas
2016	J	`jnl`	Research and Education in Computational Science and Engineering. CoRR Ulrich Rüde, Karen Willcox, Lois Curfman McInnes, Hans De Sterck, George Biros, Hans-Joachim Bungartz, James Corones, Evin Cramer, James Crowley, Omar Ghattas, Max D. Gunzburger, Michael Hanke, Robert J. Harrison, Michael A. Heroux, Jan S. Hesthaven, Peter K. Jimack, Chris Johnson, Kirk E. Jordan, David E. Keyes, Rolf H. Krause, Vipin Kumar, Stefan Mayer, Juan Meza, Knut Martin Mørken, J. Tinsley Oden, Linda R. Petzold, Padma Raghavan, Suzanne M. Shontz, Anne E. Trefethen, Peter R. Turner, Vladimir V. Voevodin, Barbara I. Wohlmuth, Carol S. Woodward
2016	—	`conf`	Scalable Algorithms for Bayesian Inference of Large-Scale Models from Large-Scale Data. VECPAR Omar Ghattas, Tobin Isaac, Noémi Petra, Georg Stadler
2016	J	`jnl`	Weighted BFBT Preconditioner for Stokes Flow Problems with Highly Heterogeneous Viscosity. CoRR Johann Rudi, Georg Stadler, Omar Ghattas
2015	A	`conf`	A Nested Partitioning Algorithm for Adaptive Meshes on Heterogeneous Clusters. ICS Hari Sundar, Omar Ghattas
2015	A	`conf`	An extreme-scale implicit solver for complex PDEs: highly heterogeneous flow in earth's mantle. SC Johann Rudi, A. Cristiano I. Malossi, Tobin Isaac, Georg Stadler, Michael Gurnis, Peter W. J. Staar, Yves Ineichen, Costas Bekas, Alessandro Curioni, Omar Ghattas
2015	J	`jnl`	Discretely Exact Derivatives for Hyperbolic PDE-Constrained Optimization Problems Discretized by the Discontinuous Galerkin Method. J. Sci. Comput. Lucas C. Wilcox, Georg Stadler, Tan Bui-Thanh, Omar Ghattas
2015	J	`jnl`	Recursive Algorithms for Distributed Forests of Octrees. SIAM J. Sci. Comput. Tobin Isaac, Carsten Burstedde, Lucas C. Wilcox, Omar Ghattas
2015	J	`jnl`	Scalable and efficient algorithms for the propagation of uncertainty from data through inference to prediction for large-scale problems, with application to flow of the Antarctic ice sheet. J. Comput. Phys. Tobin Isaac, Noemi Petra, Georg Stadler, Omar Ghattas
2015	J	`jnl`	Solution of Nonlinear Stokes Equations Discretized By High-Order Finite Elements on Nonconforming and Anisotropic Meshes, with Application to Ice Sheet Dynamics. SIAM J. Sci. Comput. Tobin Isaac, Georg Stadler, Omar Ghattas
2014	J	`jnl`	A Computational Framework for Infinite-Dimensional Bayesian Inverse Problems, Part II: Stochastic Newton MCMC with Application to Ice Sheet Flow Inverse Problems. SIAM J. Sci. Comput. Noemi Petra, James Martin, Georg Stadler, Omar Ghattas
2014	J	`jnl`	A-Optimal Design of Experiments for Infinite-Dimensional Bayesian Linear Inverse Problems with Regularized ℓ SIAM J. Sci. Comput. Alen Alexanderian, Noemi Petra, Georg Stadler, Omar Ghattas
2014	J	`jnl`	An Analysis of Infinite Dimensional Bayesian Inverse Shape Acoustic Scattering and Its Numerical Approximation. SIAM/ASA J. Uncertain. Quantification Tan Bui-Thanh, Omar Ghattas
2014	J	`jnl`	Recursive Algorithms for Distributed Forests of Octrees. CoRR Tobin Isaac, Carsten Burstedde, Lucas C. Wilcox, Omar Ghattas
2014	J	`jnl`	Solution of nonlinear Stokes equations discretized by high-order finite elements on nonconforming and anisotropic meshes, with application to ice sheet dynamics. CoRR Tobin Isaac, Georg Stadler, Omar Ghattas
2013	J	`jnl`	A Computational Framework for Infinite-Dimensional Bayesian Inverse Problems Part I: The Linearized Case, with Application to Global Seismic Inversion. SIAM J. Sci. Comput. Tan Bui-Thanh, Omar Ghattas, James Martin, Georg Stadler
2013	J	`jnl`	A Nested Partitioning Scheme for Parallel Heterogeneous Clusters. CoRR Jesse Kelly, Omar Ghattas, Hari Sundar
2013	J	`jnl`	A Unified Discontinuous Petrov-Galerkin Method and Its Analysis for Friedrichs' Systems. SIAM J. Numer. Anal. Tan Bui-Thanh, Leszek F. Demkowicz, Omar Ghattas
2013	J	`jnl`	Constructively well-posed approximation methods with unity inf-sup and continuity constants for partial differential equations. Math. Comput. Tan Bui-Thanh, Leszek F. Demkowicz, Omar Ghattas
2012	J	`jnl`	A Stochastic Newton MCMC Method for Large-Scale Statistical Inverse Problems with Application to Seismic Inversion. SIAM J. Sci. Comput. James Martin, Lucas C. Wilcox, Carsten Burstedde, Omar Ghattas
2012	J	`jnl`	Adaptive Hessian-Based Nonstationary Gaussian Process Response Surface Method for Probability Density Approximation with Application to Bayesian Solution of Large-Scale Inverse Problems. SIAM J. Sci. Comput. Tan Bui-Thanh, Omar Ghattas, David Higdon
2012	J	`jnl`	Analysis of an hp-Nonconforming Discontinuous Galerkin Spectral Element Method for Wave Propagation. SIAM J. Numer. Anal. Tan Bui-Thanh, Omar Ghattas
2012	Misc	`conf`	Dynamic Data Driven Methods for Self-aware Aerospace Vehicles. ICCS Douglas L. Allaire, George Biros, J. Chambers, Omar Ghattas, D. Kordonowy, Karen Willcox
2012	A	`conf`	Extreme-scale UQ for Bayesian inverse problems governed by PDEs. SC Tan Bui-Thanh, Carsten Burstedde, Omar Ghattas, James Martin, Georg Stadler, Lucas C. Wilcox
2012	A	`conf`	Low-Cost Parallel Algorithms for 2: 1 Octree Balance. IPDPS Tobin Isaac, Carsten Burstedde, Omar Ghattas
2012	A	`conf`	Parallel geometric-algebraic multigrid on unstructured forests of octrees. SC Hari Sundar, George Biros, Carsten Burstedde, Johann Rudi, Omar Ghattas, Georg Stadler
2011	J	`jnl`	A Shape Hessian-Based Boundary Roughness Analysis of Navier-Stokes Flow. SIAM J. Appl. Math. Shan Yang, Georg Stadler, Robert D. Moser, Omar Ghattas
2011	J	`jnl`	Fast Algorithms for Bayesian Uncertainty Quantification in Large-Scale Linear Inverse Problems Based on Low-Rank Partial Hessian Approximations. SIAM J. Sci. Comput. H. P. Flath, Lucas C. Wilcox, Volkan Akcelik, Judith C. Hill, Bart G. van Bloemen Waanders, Omar Ghattas
2011	J	`jnl`	p4est: Scalable Algorithms for Parallel Adaptive Mesh Refinement on Forests of Octrees. SIAM J. Sci. Comput. Carsten Burstedde, Lucas C. Wilcox, Omar Ghattas
2010	J	`jnl`	A high-order discontinuous Galerkin method for wave propagation through coupled elastic-acoustic media. J. Comput. Phys. Lucas C. Wilcox, Georg Stadler, Carsten Burstedde, Omar Ghattas
2010	A	`conf`	Extreme-Scale AMR. SC Carsten Burstedde, Omar Ghattas, Michael Gurnis, Tobin Isaac, Georg Stadler, Tim Warburton, Lucas C. Wilcox
2010	J	`jnl`	Parameter and State Model Reduction for Large-Scale Statistical Inverse Problems. SIAM J. Sci. Comput. Chad Lieberman, Karen Willcox, Omar Ghattas
2010	J	`jnl`	Variational Image Segmentation for Endoscopic Human Colonic Aberrant Crypt Foci. IEEE Trans. Medical Imaging Isabel N. Figueiredo, Pedro N. Figueiredo, Georg Stadler, Omar Ghattas, Adérito Araújo
2008	J	`jnl`	Model Reduction for Large-Scale Systems with High-Dimensional Parametric Input Space. SIAM J. Sci. Comput. Tan Bui-Thanh, Karen Willcox, Omar Ghattas
2008	A	`conf`	Scalable adaptive mantle convection simulation on petascale supercomputers. SC Carsten Burstedde, Omar Ghattas, Michael Gurnis, Georg Stadler, Eh Tan, Tiankai Tu, Lucas C. Wilcox, Shijie Zhong
2007	J	`jnl`	Goal-oriented, model-constrained optimization for reduction of large-scale systems. J. Comput. Phys. Tan Bui-Thanh, Karen Willcox, Omar Ghattas, Bart G. van Bloemen Waanders
2007	Misc	`conf`	Hessian-Based Model Reduction for Large-Scale Data Assimilation Problems. International Conference on Computational Science (1) Omar Bashir, Omar Ghattas, Judith C. Hill, Bart G. van Bloemen Waanders, Karen Willcox
2006	A	`conf`	Analytics challenge - Remote runtime steering of integrated terascale simulation and visualization. SC Tiankai Tu, Hongfeng Yu, Jacobo Bielak, Omar Ghattas, Julio C. López, Kwan-Liu Ma, David R. O'Hallaron, Leonardo Ramírez-Guzmán, Nathan Stone, Ricardo Taborda-Rios, John Urbanic
2006	Misc	`conf`	Inversion of Airborne Contaminants in a Regional Model. International Conference on Computational Science (3) Volkan Akcelik, George Biros, Andrei Draganescu, Omar Ghattas, Judith C. Hill, Bart G. van Bloemen Waanders
2006	—	`ch.`	Parallel Algorithms for PDE-Constrained Optimization. Parallel Processing for Scientific Computing Volkan Akçelik, George Biros, Omar Ghattas, Judith Hill, David E. Keyes, Bart G. van Bloemen Waanders
2006	A	`conf`	Scalable systems software - From mesh generation to scientific visualization: an end-to-end approach to parallel supercomputing. SC Tiankai Tu, Hongfeng Yu, Leonardo Ramírez-Guzmán, Jacobo Bielak, Omar Ghattas, Kwan-Liu Ma, David R. O'Hallaron
2005	—	`conf`	An Optimization Frame work for Goal-Oriented, Model-Based Reduction of Large-Scale Systems. CDC/ECC Karen Willcox, Omar Ghattas, Bart G. van Bloemen Waanders, Brett W. Bader
2005	A	`conf`	Dynamic Data-Driven Inversion For Terascale Simulations: Real-Time Identification Of Airborne Contaminants. SC Volkan Akcelik, George Biros, Andrei Draganescu, Judith C. Hill, Omar Ghattas, Bart G. van Bloemen Waanders
2005	J	`jnl`	Parallel Lagrange-Newton-Krylov-Schur Methods for PDE-Constrained Optimization. Part I: The Krylov-Schur Solver. SIAM J. Sci. Comput. George Biros, Omar Ghattas
2005	J	`jnl`	Parallel Lagrange-Newton-Krylov-Schur Methods for PDE-Constrained Optimization. Part II: The Lagrange-Newton Solver and Its Application to Optimal Control of Steady Viscous Flows. SIAM J. Sci. Comput. George Biros, Omar Ghattas
2005	A	`conf`	Scalable Parallel Octree Meshing for TeraScale Applications. SC Tiankai Tu, David R. O'Hallaron, Omar Ghattas
2004	Misc	`conf`	A Framework for Online Inversion-Based 3D Site Characterization. International Conference on Computational Science Volkan Akcelik, Jacobo Bielak, George Biros, Ioannis Epanomeritakis, Omar Ghattas, Loukas F. Kallivokas, Eui Joong Kim
2003	A	`conf`	High Resolution Forward And Inverse Earthquake Modeling on Terascale Computers. SC Volkan Akcelik, Jacobo Bielak, George Biros, Ioannis Epanomeritakis, Antonio Fernandez, Omar Ghattas, Eui Joong Kim, Julio C. López, David R. O'Hallaron, Tiankai Tu, John Urbanic
2003	A	`conf`	Visualizing Very Large-Scale Earthquake Simulations. SC Kwan-Liu Ma, Aleksander Stompel, Jacobo Bielak, Omar Ghattas, Eui Joong Kim
2002	A	`conf`	Parallel multiscale Gauss-Newton-Krylov methods for inverse wave propagation. SC Volkan Akcelik, George Biros, Omar Ghattas
2001	J	`jnl`	Optimal Design of Truss Structures by Logic-Based Branch and Cut. Oper. Res. Srinivas Bollapragada, Omar Ghattas, John N. Hooker
2000	A	`conf`	A Parallel Dynamic-Mesh Lagrangian Method for Simulation of Flows with Dynamic Interfaces. SC James F. Antaki, Guy E. Blelloch, Omar Ghattas, Ivan Malcevic, Gary L. Miller, Noel Walkington
1999	A	`conf`	Parallel Netwon-Krylov Methods for PDE-Constrained Optimization. SC George Biros, Omar Ghattas
1995	—	`conf`	Towards More Capable and Less Invasive Robotic Surgery in Orthopaedics. CVRMed R. V. O'Toole III, David A. Simon, Branislav Jaramaz, Omar Ghattas, Mike Blackwell, Loukas F. Kallivokas, F. Morgan, Christopher D. Visnic, Anthony M. DiGioia, Takeo Kanade
1994	Misc	`conf`	Finite element pre-operative simulation of cementless hip replacement. WSC Christopher D. Visnic, Robert H. Reid, Omar Ghattas, Anthony M. DiGioia, Branislav Jaramaz
1991	A*	`conf`	Geometric Reasoning for Shape Design. AAAI George Turkiyyah, Omar Ghattas