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Displaying 1-25 out of 25 total
ManyVis: Multiple Applications in an Integrated Visualization Environment
Found in: IEEE Transactions on Visualization and Computer Graphics
By Atul Rungta,Brian Summa,Dogan Demir,Peer-Timo Bremer,Valerio Pascucci
Issue Date:December 2013
pp. 2878-2885
As the visualization field matures, an increasing number of general toolkits are developed to cover a broad range of applications. However, no general tool can incorporate the latest capabilities for all possible applications, nor can the user interfaces a...
 
Topological Spines: A Structure-preserving Visual Representation of Scalar Fields
Found in: IEEE Transactions on Visualization and Computer Graphics
By C. Correa,P. Lindstrom,Peer-Timo Bremer
Issue Date:December 2011
pp. 1842-1851
We present topological spines-a new visual representation that preserves the topological and geometric structure of a scalar field. This representation encodes the spatial relationships of the extrema of a scalar field together with the local volume and ne...
 
The Natural Helmholtz-Hodge Decomposition for Open-Boundary Flow Analysis
Found in: IEEE Transactions on Visualization and Computer Graphics
By Harsh Bhatia,Valerio Pascucci,Peer-Timo Bremer
Issue Date:November 2014
pp. 1566-1578
The Helmholtz-Hodge decomposition (HHD), which describes a flow as the sum of an incompressible, an irrotational, and a harmonic flow, is a fundamental tool for simulation and analysis. Unfortunately, for bounded domains, the HHD is not uniquely defined, t...
 
Ultrascale Visualization of Climate Data
Found in: Computer
By Dean N. Williams,Timo Bremer,Charles Doutriaux,John Patchett,Sean Williams,Galen Shipman,Ross Miller,David R. Pugmire,Brian Smith,Chad Steed,E. Wes Bethel,Hank Childs,Harinarayan Krishnan,Prabhat Prabhat,Michael Wehner,Claudio T. Silva,Emanuele Santos,David Koop,Tommy Ellqvist,Jorge Poco,Berk Geveci,Aashish Chaudhary,Andy Bauer,Alexander Pletzer,Dave Kindig,Gerald L. Potter,Thomas P. Maxwell
Issue Date:September 2013
pp. 68-76
Collaboration across research, government, academic, and private sectors is integrating more than 70 scientific computing libraries and applications through a tailorable provenance framework, empowering scientists to exchange and examine data in novel ways...
 
The Helmholtz-Hodge Decomposition—A Survey
Found in: IEEE Transactions on Visualization and Computer Graphics
By H. Bhatia,G. Norgard,V. Pascucci,Peer-Timo Bremer
Issue Date:August 2013
pp. 1386-1404
The Helmholtz-Hodge Decomposition (HHD) describes the decomposition of a flow field into its divergence-free and curl-free components. Many researchers in various communities like weather modeling, oceanology, geophysics, and computer graphics are interest...
 
Visualizing Network Traffic to Understand the Performance of Massively Parallel Simulations
Found in: IEEE Transactions on Visualization and Computer Graphics
By A. G. Landge,J. A. Levine,A. Bhatele,K. E. Isaacs,T. Gamblin,M. Schulz,S. H. Langer,Peer-Timo Bremer,V. Pascucci
Issue Date:December 2012
pp. 2467-2476
The performance of massively parallel applications is often heavily impacted by the cost of communication among compute nodes. However, determining how to best use the network is a formidable task, made challenging by the ever increasing size and complexit...
 
Abstract: Exploring Performance Data with Boxfish
Found in: 2012 SC Companion: High Performance Computing, Networking, Storage and Analysis (SCC)
By Katherine E. Isaacs,Aaditya G. Landge,Todd Gamblin,Peer-Timo Bremer,Valerio Pascucci,Bernd Hamann
Issue Date:November 2012
pp. 1380-1381
The growth in size and complexity of scaling applications and the systems on which they run pose challenges in analyzing and improving their overall performance. With metrics coming from thousands or millions of processes, visualization techniques are nece...
 
Novel views of performance data to analyze large-scale adaptive applications
Found in: 2012 SC - International Conference for High Performance Computing, Networking, Storage and Analysis
By Abhinav Bhatele,Todd Gamblin,Katherine E. Isaacs,Brian T. N. Gunney,Martin Schulz,Peer-Timo Bremer,Bernd Hamann
Issue Date:November 2012
pp. 1-11
Performance analysis of parallel scientific codes is becoming increasingly difficult due to the rapidly growing complexity of applications and architectures. Existing tools fall short in providing intuitive views that facilitate the process of performance ...
 
Combining in-situ and in-transit processing to enable extreme-scale scientific analysis
Found in: 2012 SC - International Conference for High Performance Computing, Networking, Storage and Analysis
By Janine C. Bennett,Hasan Abbasi,Peer-Timo Bremer,Ray Grout,Attila Gyulassy,Tong Jin,Scott Klasky,Hemanth Kolla,Manish Parashar,Valerio Pascucci,Philippe Pebay,David Thompson,Hongfeng Yu,Fan Zhang,Jacqueline Chen
Issue Date:November 2012
pp. 1-9
With the onset of extreme-scale computing, I/O constraints make it increasingly difficult for scientists to save a sufficient amount of raw simulation data to persistent storage. One potential solution is to change the data analysis pipeline from a post-pr...
 
Feature-Based Statistical Analysis of Combustion Simulation Data
Found in: IEEE Transactions on Visualization and Computer Graphics
By Janine C. Bennett,Vaidyanathan Krishnamoorthy, Shusen Liu,Ray W. Grout,Evatt R. Hawkes,Jacqueline H. Chen,Jason Shepherd,Valerio Pascucci,Peer-Timo Bremer
Issue Date:December 2011
pp. 1822-1831
We present a new framework for feature-based statistical analysis of large-scale scientific data and demonstrate its effectiveness by analyzing features from Direct Numerical Simulations (DNS) of turbulent combustion. Turbulent flows are ubiquitous and acc...
 
A Topological Approach to Simplification of Three-Dimensional Scalar Functions
Found in: IEEE Transactions on Visualization and Computer Graphics
By Attila Gyulassy, Vijay Natarajan, Valerio Pascucci, Peer-Timo Bremer, Bernd Hamann
Issue Date:July 2006
pp. 474-484
<p><b>Abstract</b>—This paper describes an efficient combinatorial method for simplification of topological features in a 3D scalar function. The Morse-Smale complex, which provides a succinct representation of a function's associated gra...
 
Topology-based Simplification for Feature Extraction from 3D Scalar Fields
Found in: Visualization Conference, IEEE
By Attila Gyulassy, Vijay Natarajan, Valerio Pascucci, Peer-Timo Bremer, Bernd Hamann
Issue Date:October 2005
pp. 68
In this paper, we present a topological approach for simplifying continuous functions defined on volumetric domains. We introduce two atomic operations that remove pairs of critical points of the function and design a combinatorial algorithm that simplifie...
 
Distributed Seams for Gigapixel Panoramas
Found in: IEEE Transactions on Visualization and Computer Graphics
By Sujin Philip,Brian Summa,Julien Tierny,Peer-Timo Bremer,Valerio Pascucci
Issue Date:February 2015
pp. 1
Gigapixel panoramas are an increasingly popular digital image application. They are often created as a mosaic of many smaller images. The mosaic acquisition can take many hours causing the individual images to differ in exposure and lighting conditions. A ...
 
ManyVis: Multiple Applications in an Integrated Visualization Environment
Found in: IEEE Transactions on Visualization and Computer Graphics
By Atul Rungta,Brian Summa,Dogan Demir,Peer-Timo Bremer,Valerio Pascucci
Issue Date:December 2013
pp. 2878-2885
As the visualization field matures, an increasing number of general toolkits are developed to cover a broad range of applications. However, no general tool can incorporate the latest capabilities for all possible applications, nor can the user interfaces a...
 
Mapping applications with collectives over sub-communicators on torus networks
Found in: 2012 SC - International Conference for High Performance Computing, Networking, Storage and Analysis
By Abhinav Bhatele,Todd Gamblin,Steven H. Langer,Peer-Timo Bremer,Erik W. Draeger,Bernd Hamann,Katherine E. Isaacs,Aaditya G. Landge,Joshua A. Levine,Valerio Pascucci,Martin Schulz,Charles H. Still
Issue Date:November 2012
pp. 1-11
The placement of tasks in a parallel application on specific nodes of a supercomputer can significantly impact performance. Traditionally, this task mapping has focused on reducing the distance between communicating tasks on the physical network. This mini...
 
Edge maps: Representing flow with bounded error
Found in: 2011 IEEE Pacific Visualization Symposium (PacificVis)
By Harsh Bhatia,Shreeraj Jadhav,Peer-Timo Bremer, Guoning Chen,Joshua A Levine,Luis Gustavo Nonato,Valerio Pascucci
Issue Date:March 2011
pp. 75-82
Robust analysis of vector fields has been established as an important tool for deriving insights from the complex systems these fields model. Many analysis techniques rely on computing streamlines, a task often hampered by numerical instabilities. Approach...
 
Extracting logical structure and identifying stragglers in parallel execution traces
Found in: Proceedings of the 19th ACM SIGPLAN symposium on Principles and practice of parallel programming (PPoPP '14)
By Abhinav Bhatele, Bernd Hamann, Katherine E. Isaacs, Martin Schulz, Peer-Timo Bremer, Todd Gamblin
Issue Date:February 2014
pp. 397-398
We introduce a new approach to automatically extract an idealized logical structure from a parallel execution trace. We use this structure to define intuitive metrics such as the lateness of a process involved in a parallel execution. By analyzing and illu...
     
Exploring power behaviors and trade-offs of in-situ data analytics
Found in: Proceedings of SC13: International Conference for High Performance Computing, Networking, Storage and Analysis (SC '13)
By Aaditya G. Landge, Attila Gyulassy, Hemanth Kolla, Jacqueline Chen, Marc Gamell, Patrick McCormick, Peer-Timo Bremer, Scott Klasky, Valerio Pascucci, Ivan Rodero, Janine C. Bennett, Manish Parashar, Scott Pakin
Issue Date:November 2013
pp. 1-12
As scientific applications target exascale, challenges related to data and energy are becoming dominating concerns. For example, coupled simulation workflows are increasingly adopting in-situ data processing and analysis techniques to address costs and ove...
     
Topology exploration with hierarchical landscapes
Found in: Proceedings of the Workshop at SIGGRAPH Asia (WASA '12)
By Bernd Hamann, Dogan Demir, Gunther H. Weber, Kenes Beketayev, Peer-Timo Bremer, Valerio Pascucci
Issue Date:November 2012
pp. 147-154
Topological landscapes have been proposed as a visual metaphor for contour trees that does not require an understanding of the theory involved in defining contour trees. The idea is to create a representative terrain with the same topological structure as ...
     
Interactive editing of massive imagery made simple: Turning Atlanta into Atlantis
Found in: ACM Transactions on Graphics (TOG)
By Brian Summa, Giorgio Scorzelli, Ming Jiang, Peer-Timo Bremer, Valerio Pascucci
Issue Date:April 2011
pp. 1-13
This article presents a simple framework for progressive processing of high-resolution images with minimal resources. We demonstrate this framework's effectiveness by implementing an adaptive, multi-resolution solver for gradient-based image processing tha...
     
Interactive editing of massive imagery made simple: Turning atlanta into atlantis
Found in: ACM Transactions on Graphics (TOG)
By Brian Summa, Giorgio Scorzelli, Ming Jiang, Peer-Timo Bremer, Valerio Pascucci
Issue Date:October 2010
pp. 1-13
This article presents a simple framework for progressive processing of high-resolution images with minimal resources. We demonstrate this framework's effectiveness by implementing an adaptive, multi-resolution solver for gradient-based image processing tha...
     
Lessons learned from moving earth system grid data sets over a 20 Gbps wide-area network
Found in: Proceedings of the 19th ACM International Symposium on High Performance Distributed Computing (HPDC '10)
By Alex Sim, Andrew Cherry, Bill Allcock, Dan Gunter, David Ressman, Dean Williams, Eli Dart, Ian Foster, Jason Hick, Jason Lee, Jeff Long, John Bresnahan, Keith Miller, Ken Raffenetti, Kevin Harms, Linda Winkler, Lisa Childers, Loren Wilson, Michael Link, Peer-Timo Bremer, Raj Kettimuthu, Valerio Pascucci, Vijaya Natarajan
Issue Date:June 2010
pp. 316-319
In preparation for the Intergovernmental Panel on Climate Change (IPCC) Fifth Assessment Report, the climate community will run the Coupled Model Intercomparison Project phase 5 (CMIP-5) experiments, which are designed to answer crucial questions about fut...
     
Robust on-line computation of Reeb graphs: simplicity and speed
Found in: ACM Transactions on Graphics (TOG)
By Ajith Mascarenhas, Giorgio Scorzelli, Peer-Timo Bremer, Valerio Pascucci
Issue Date:July 2007
pp. 1-35
Reeb graphs are a fundamental data structure for understanding and representing the topology of shapes. They are used in computer graphics, solid modeling, and visualization for applications ranging from the computation of similarities and finding defects ...
     
Spectral surface quadrangulation: Copyright restrictions prevent ACM from providing the full text for this work.
Found in: ACM SIGGRAPH 2006 Papers (SIGGRAPH '06)
By John C. Hart, Michael Garland, Peer-Timo Bremer, Shen Dong, Valerio Pascucci
Issue Date:July 2006
pp. 66-es
Resampling raw surface meshes is one of the most fundamental operations used by nearly all digital geometry processing systems. The vast majority of this work has focused on triangular remeshing, yet quadrilateral meshes are preferred for many surface PDE ...
     
Spectral surface quadrangulation: Copyright restrictions prevent ACM from providing the full text for this work.
Found in: Material presented at the ACM SIGGRAPH 2006 conference (SIGGRAPH '06)
By John C. Hart, Michael Garland, Peer-Timo Bremer, Shen Dong, Valerio Pascucci
Issue Date:July 2006
pp. 66-es
Resampling raw surface meshes is one of the most fundamental operations used by nearly all digital geometry processing systems. The vast majority of this work has focused on triangular remeshing, yet quadrilateral meshes are preferred for many surface PDE ...
     
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