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Physics-based seismic hazard analysis on petascale heterogeneous supercomputers

Y. Cui, A. Chourasia, Z. Shi, S. M. Day, P. J. Maechling, T. H. Jordan, E. Poyraz, K. B. Olsen, J. Zhou, K. Withers, S. Callaghan, J. Larkin (+2 others)
2013 Proceedings of the International Conference for High Performance Computing, Networking, Storage and Analysis on - SC '13  
We have developed a highly scalable and efficient GPU-based finite-difference code (AWP) for earthquake simulation that implements high throughput, memory locality, communication reduction and communication  ...  Moreover, we show that AWP provides a speedup by a factor of 110 in key strain tensor calculations critical to probabilistic seismic hazard analysis (PSHA).  ...  The fractal roughness is controlled by a Hurst number, which we set at 0.2, and the size of the heterogeneity by a standard deviation, which we set at 5%, as constrained by near-surface and borehole velocity  ... 
doi:10.1145/2503210.2503300 dblp:conf/sc/CuiPOZWCLGCCSDMJ13 fatcat:3klm3s6hqjhgblxcwybum7tfza

EMMA: an adaptive mesh refinement cosmological simulation code with radiative transfer

Dominique Aubert, Nicolas Deparis, Pierre Ocvirk
2015 Monthly notices of the Royal Astronomical Society  
A suite of standard tests are presented and passed by EMMA, providing a validation for its future use in studies of the reionization epoch.  ...  The code is parallel and is able to use graphics processing units (GPUs) to accelerate hydrodynamics and radiative transfer calculations.  ...  , probably of a factor of a few, making it competitive with current GPU accelerations.  ... 
doi:10.1093/mnras/stv1896 fatcat:b7t5vgn7vne4xcpchpa4kdugqu

MuJoCo: A physics engine for model-based control

Emanuel Todorov, Tom Erez, Yuval Tassa
2012 2012 IEEE/RSJ International Conference on Intelligent Robots and Systems  
The engine will soon be ported to GPUs, further improving numerical performance and enabling model-predictive control of complex robots. We have already used it in a number of applications.  ...  This computation is multi-threaded, allowing us to run˜100 quasi-Newton trajectory optimization steps per second on a modern computer, for a 3D humanoid walker with 18 degrees of freedom.  ...  ACKNOWLEDGMENTS This work was supported by the NSF.  ... 
doi:10.1109/iros.2012.6386109 dblp:conf/iros/TodorovET12 fatcat:cblbh2wpwjewpcsrqog3x3j5xi

BlenderPhotonics: an integrated open-source software environment for three-dimensional meshing and photon simulations in complex tissues

Yuxuang Zhang, Qianqian Fang
2022 Journal of Biomedical Optics  
hardware-accelerated 3D light simulations with only a few clicks.  ...  BlenderPhotonics is user friendly and open source, and it leverages the vastly rich ecosystem of Blender. It wraps advanced modeling capabilities within an easy-to-use and interactive interface.  ...  Acknowledgments This research was supported by the National Institutes of Health (NIH) Grant Nos. R01-GM114365, U24-NS124027, and R01-EB026998.  ... 
doi:10.1117/1.jbo.27.8.083014 pmid:35429155 pmcid:PMC9010662 fatcat:pr7dktilw5cf7jmt5wof32mnka

AFiD-GPU: A versatile Navier–Stokes solver for wall-bounded turbulent flows on GPU clusters

Xiaojue Zhu, Everett Phillips, Vamsi Spandan, John Donners, Gregory Ruetsch, Joshua Romero, Rodolfo Ostilla-Mónico, Yantao Yang, Detlef Lohse, Roberto Verzicco, Massimiliano Fatica, Richard J.A.M. Stevens
2018 Computer Physics Communications  
a few routines have been manually rewritten.  ...  The GPU version can reduce the wall clock time by an order of magnitude compared to the CPU version for large meshes.  ...  This work was supported by a grant from the Swiss National Supercomputing Center (CSCS) under project ID g33 and by the Netherlands Center for Multiscale Catalytic Energy Conversion (MCEC), an NWO Gravitation  ... 
doi:10.1016/j.cpc.2018.03.026 fatcat:7euzvnsuqncsvg5mdlsuogymoi

The Abacus cosmological N-body code

Lehman H Garrison, Daniel J Eisenstein, Douglas Ferrer, Nina A Maksimova, Philip A Pinto
2021 Monthly notices of the Royal Astronomical Society  
Abacus enables the production of mock catalogs of the volume and resolution required by the coming generation of cosmological surveys.  ...  We present Abacus, a fast and accurate cosmological N-body code based on a new method for calculating the gravitational potential from a static multipole mesh.  ...  This work has been supported by NSF AST-1313285 and DOE-SC0013718, as well as by Harvard University startup funds. DJE is supported in part as a Simons Foundation investigator.  ... 
doi:10.1093/mnras/stab2482 fatcat:3uashfdf3fgnzmeorsa2y24nbi


2019 ANZIAM journal (Print)  
A new spectral method is introduced for the fully 3D nonlinear problem in a Boussinesq fluid, where the interface between the light and heavy fluids is approximated with a smooth but rapid density change  ...  Rayleigh–Taylor instability occurs when a heavier fluid overlies a lighter fluid, and the two seek to exchange positions under the effect of gravity.  ...  Acknowledgements The authors gratefully acknowledge the financial support for this work provided by Australian Research Council Discovery Grant DP140100094.  ... 
doi:10.1017/s1446181119000087 fatcat:cl34mex37nfytldoc2dsyeyiyy

Interactive authoring of simulation-ready plants

Yili Zhao, Jernej Barbič
2013 ACM Transactions on Graphics  
Our system decomposes the plant geometry, establishes a hierarchy, builds and connects simulation meshes, and detects instances.  ...  We demonstrate the results using a FEM model reduction simulator that can compute large-deformation dynamics of complex plants at interactive rates, subject to user forces, gravity or randomized wind.  ...  This research was sponsored in part by the National Science Foundation (CAREER-53-4509-6600).  ... 
doi:10.1145/2461912.2461961 fatcat:badyvwbydfahxpgkdm6qh2lcr4

3D hand tracking for human computer interaction

Victor Adrian Prisacariu, Ian Reid
2012 Image and Vision Computing  
We demonstrate the benefits of our method, both qualitatively and quantitatively, on a variety of video sequences and hand configurations and show a proof-of-concept human computer interface based on our  ...  We propose a real-time model-based 3D hand tracker that combines image regions and the signal from an off-the-shelf 3-axis accelerometer placed on the user's hand.  ...  One goal is to replace the standard mouse and keyboard-type interaction, which limits the user to a constrained work flow, with gesture and touch-based interfaces.  ... 
doi:10.1016/j.imavis.2012.01.003 fatcat:m4v3ifsmszdtngrm2uhjjwxm7y

A well balanced diffuse interface method for complex nonhydrostatic free surface flows [article]

Elena Gaburro, Manuel J. Castro, Michael Dumbser
2018 arXiv   pre-print
The two-phase model does not make any of the classical assumptions of shallow water type systems, hence it does not neglect vertical accelerations and the free surface is not constraint to be a single-valued  ...  Finally, high computational performance is guaranteed by an efficient parallel implementation on a GPU-based platform that reaches the efficiency of twenty million of volumes processed per seconds and  ...  Acknowledgments The research presented in this paper has been partially financed by the European Research Council  ... 
arXiv:1806.04960v2 fatcat:z545oks3r5dofcllgvrir6ottu

DeepWarp: DNN-based Nonlinear Deformation [article]

Ran Luo, Tianjia Shao, Huamin Wang, Weiwei Xu, Kun Zhou, Yin Yang
2018 IEEE Transactions on Visualization and Computer Graphics   pre-print
With the assistance of deformation substructuring, one DNN training is able to handle a wide range of 3D models of various geometries including most examples shown in the paper.  ...  DeepWarp obviates this difficulty by partially restoring the force-displacement relation via warping the nodal displacement simulated using a simplistic constitutive model -- the linear elasticity.  ...  With the linear modal reduction, the cost for the diagonalized linear solver is reduced to O(r), and one should expect more noticeable accelerations by using the GPU.  ... 
doi:10.1109/tvcg.2018.2881451 pmid:30442607 arXiv:1803.09109v1 fatcat:6tsat5mejzcoxe5um57nvj7a6a

Accelerating AGN jets to parsec scales using general relativistic MHD simulations [article]

Koushik Chatterjee, Matthew Liska, Alexander Tchekhovskoy, Sera B. Markoff
2019 arXiv   pre-print
Supported by such a disc, the jet attains a parabolic shape, similar to the M87 galaxy jet, and the product of the Lorentz factor and the jet half-opening angle, γθ≪ 1, similar to values found from very  ...  Thus pinched regions in the jet can be detectable as radiating hotspots and may provide an ideal site for particle acceleration.  ...  The LAT reduces the number of conserved to primitive variable inversions and thereby increases the accuracy of the simulation (Appendix A); additionally, it speeds up the code by a factor of ∼ 3−5.  ... 
arXiv:1904.03243v2 fatcat:4thszmvpd5bfnlylyx4p2g2n3m

Real-time simulation of contact and cutting of heterogeneous soft-tissues

Hadrien Courtecuisse, Jérémie Allard, Pierre Kerfriden, Stéphane P.A. Bordas, Stéphane Cotin, Christian Duriez
2014 Medical Image Analysis  
and other topological changes.  ...  We also address the problem of cutting the heterogeneous structures and propose a method to update the preconditioner according to the topological modifications.  ...  The authors would like to thank Mouhamadou Diallo and Igor Peterlik for their help and their assistance during the comparaison between SOFA and ABAQUS.  ... 
doi:10.1016/ pmid:24440853 pmcid:PMC6485523 fatcat:hcr2r62zqnes7n6iu6opbyhexa

ESPResSo 3.1: Molecular Dynamics Software for Coarse-Grained Models [chapter]

Axel Arnold, Olaf Lenz, Stefan Kesselheim, Rudolf Weeber, Florian Fahrenberger, Dominic Roehm, Peter Košovan, Christian Holm
2012 Lecture Notes in Computational Science and Engineering  
This computationally expensive algorithm can be greatly accelerated by using Graphics Processing Units.  ...  A major strength of our package is the multitude of implemented methods for calculating Coulomb and dipolar interactions in periodic and partially periodic geometries.  ...  Without these contributions and, of course, the feedback of our users, ESPRESSO would never have reached its current status.  ... 
doi:10.1007/978-3-642-32979-1_1 fatcat:6atucbbqp5hljn6gsct3dbo2rq

Isaac Gym: High Performance GPU-Based Physics Simulation For Robot Learning [article]

Viktor Makoviychuk, Lukasz Wawrzyniak, Yunrong Guo, Michelle Lu, Kier Storey, Miles Macklin, David Hoeller, Nikita Rudin, Arthur Allshire, Ankur Handa, Gavriel State
2021 arXiv   pre-print
This leads to blazing fast training times for complex robotics tasks on a single GPU with 2-3 orders of magnitude improvements compared to conventional RL training that uses a CPU based simulator and GPU  ...  Both physics simulation and the neural network policy training reside on GPU and communicate by directly passing data from physics buffers to PyTorch tensors without ever going through any CPU bottlenecks  ...  Thanks are also due to open-source community projects like Matplotib [31] , Python [32] , NumPy [33] , PyTorch [34] , Tensorboard [35] , Tensorboard Aggregator [36] and SciencePlots [37] which  ... 
arXiv:2108.10470v2 fatcat:jcaxg7alkbb73gphg26j2k27fy
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