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Presentations

2013

James Ahrens, Boonthanome Nouanesengsy, Patricia Fasel, Patrick O’leary, Chris Sewell, Jon Woodring, Christopher Mitchell, Ollie Lo, Kary Myers, Joanne Wendelberger, Curt Canada, Marcus Daniels, Hilary Abhold, and Gabe Rockefeller, Case Study of In Situ Data Analysis in ASC Integrated Codes, LA-UR-13-26599, LANL CSSE Level 2 Review, August 13, 2013. [PDF] [PPTX]

John Patchett, Christopher Sewell, Jonathan Woodring, Pat Fasel, Boonthanome Nouanesengsy, and James Ahrens, Applications of In Situ Visualization For Ocean, Cosmology, And Plasma, LA-UR-13-21112, SDAV All Hands Meeting, Burlingame, CA, February 20-22, 2013. [PDF] [Poster] [BibTeX]

@techreport{patchett:SDAV:AHM:2013,
Author = {Patchett, John, Sewell, Christopher, Woodring, Jonathan, Fasel, Pat, Nouanesengsy, Boonthanome, Ahrens, James},
Institution = {Los Alamos National Laboratory},
Month = {February},
Note = {slides for presentation},
Number = {LA-UR-13-21112},
Title = {Applications of In Situ Visualization for Ocean, Cosmology, and Plasma},
Year = {2013}
}

Christopher Sewell, Li-ta Lo, and James Ahrens, PISTON: An SDAV Framework for Portable High-Performance Data-Parallel Visualization and Analysis Operators, LA-UR-13-21083, SDAV All Hands Meeting, Burlingame, CA, February 20-22, 2013. [PDF] [BibTeX]

@techreport{patchett:SDAV:AHM:2013,
Author = {Sewell, Christopher, Lo, Li-ta, Ahrens, James},
Institution = {Los Alamos National Laboratory},
Month = {February},
Note = {slides for presentation},
Number = {LA-UR-13-21083},
Title = {PISTON: An SDAV Framework for Portable High-Performance Data-Parallel Visualization and Analysis Operators},
Year = {2013}
}

2012

Christopher Sewell, Li-ta Lo, and James Ahrens, “The PISTON Software Framework for Visualization and Analysis on Next-Generation Multi-core Architectures,” LA-UR-12-26127, Visualization Frameworks for Multi-Core and Many-Core Architectures Panel at The International Conference for High Performance Computing, Networking, Storage, and Analysis, Salt Lake City, UT, November 14, 2012. [PDF][BibTeX]

@techreport{Sew:12d:PISTON,
Author = {Sewell, Christopher, Lo, Li-ta, and Ahrens, James},
Institution = {Los Alamos National Laboratory},
Month = {November},
Note = {slides for presentation},
Number = {LA-UR-12-26127},
Title = {The PISTON Software Framework for Visualization and Analysis on Next-Generation Multi-core Architectures},
Year = {2012}
}

Christopher Sewell, Ken Moreland, Jeremy Meredith, Tom Peterka, Li-ta Lo, and James Ahrens, “The SDAV Software Frameworks for Visualization and Analysis on Next-Generation Multi-core Architectures,” LA-UR-12-26127, The Seventh Workshop on Ultrascale Visualization at The International Conference for High Performance Computing, Networking, Storage, and Analysis, Salt Lake City, UT, November 12, 2012. [PDF][BibTeX]

@techreport{Sew:12e:PISTON,
Author = {Sewell, Christopher, Moreland, Ken, Meredith, Jeremy, Peterka, Tom, Lo, Li-ta, and Ahrens, James},
Institution = {Los Alamos National Laboratory},
Month = {November},
Note = {slides for presentation},
Number = {LA-UR-12-26127},
Title = {The SDAV Software Frameworks for Visualization and Analysis on Next-Generation Multi-core Architectures},
Year = {2012}
}

Christopher Sewell, Li-ta Lo, and James Ahrens, “Portability and Performance for Visualization and Analysis Operators Using the Data-Parallel PISTON Framework,” LA-UR-11-11980, Many-Core Libraries Tutorial and Code Sprint, Clifton Park, NY, September 19-20, 2012. [PDF][BibTeX]

@techreport{Sew:12a:PISTON,
Author = {Sewell, Christopher, Lo, Li-ta, and Ahrens, James},
Institution = {Los Alamos National Laboratory},
Month = {September},
Note = {slides for tutorial},
Number = {LA-UR-11-11980},
Title = {Portability and Performance for Visualization and Analysis Operators Using the Data-Parallel PISTON Framework},
Year = {2012}
}

C. M. Brislawn, “Wavelet-smoothed interpolation of masked scientific data for JPEG 2000 compression,” Los Alamos National Laboratory, Tech. Rep. LA-UR-12-24049, August 2012, slides for DOE ASCR. [PDF][BibTeX]

@techreport{Bris:12c:Wavelet-smoothed-interpol,
Author = {Brislawn, Christopher M.},
Institution = {Los Alamos National Laboratory},
Month = {August},
Note = {slides for DOE ASCR},
Number = {LA-UR-12-24049},
Title = {Wavelet-Smoothed Interpolation of Masked Scientific Data for {JPEG~2000} Compression},
Year = {2012}
}

Christopher Sewell, Li-ta Lo, and James Ahrens, “Portability and Performance for Visualization and Analysis Operators Using the Data-Parallel PISTON Framework,” LA-UR-12-21215, Accelerated High Performance Computing Symposium at the GPU Technology Conference, San Jose, CA, May 16, 2012. [PDF][BibTeX]

@techreport{Sew:12b:PISTON,
Author = {Sewell, Christopher, Lo, Li-ta, and Ahrens, James},
Institution = {Los Alamos National Laboratory},
Month = {May},
Note = {slides for presentation},
Number = {LA-UR-12-21215},
Title = {Portability and Performance for Visualization and Analysis Operators Using the Data-Parallel PISTON Framework},
Year = {2012}
}

Li-ta Lo, Christopher Sewell, and James Ahrens, “PISTON: A Portable Cross-Platform Framework for Data-Parallel Visualization Operators,” LA-UR-12-21213, Eurographics Symposium on Parallel Graphics and Visualization, Cagliari, Italy, May 13-14, 2012. [PDF][BibTeX]

@techreport{Lo:12a:PISTON,
Author = {Lo, Li-ta, Sewell, Christopher, and Ahrens, James},
Institution = {Los Alamos National Laboratory},
Month = {May},
Note = {slides for presentation},
Number = {LA-UR-12-21213},
Title = {PISTON: A Portable Cross-Platform Framework for Data-Parallel Visualization Operators},
Year = {2012}
}

Christopher Sewell, Li-ta Lo, and James Ahrens, “Portability and Performance for Visualization and Analysis Operators Using the Data-Parallel PISTON Framework,” LA-UR-11-11980, Department of Energy Computer Graphics Forum, Albuquerque, NM, April 23-26, 2012. [PDF][BibTeX]

@techreport{Sew:12c:PISTON,
Author = {Sewell, Christopher, Lo, Li-ta, and Ahrens, James},
Institution = {Los Alamos National Laboratory},
Month = {April},
Note = {slides for presentation},
Number = {LA-UR-11-11980},
Title = {Portability and Performance for Visualization and Analysis Operators Using the Data-Parallel PISTON Framework},
Year = {2012}
}

2011

Christopher Sewell, Li-ta Lo, and James Ahrens, “PISTON: A Portable Cross-Platform Framework for Data-Parallel Visualization Operators,” LA-UR-11-11980, Workshop on Ultrascale Visualization at the International Conference for High-Performance Computing, Networking, Storage, and Analysis, Seattle, WA, November 13, 2011. [PDF][BibTeX]

@techreport{Sewell:11a:PISTON,
Author = {Sewell, Christopher, Lo, Li-ta, and Ahrens, James},
Institution = {Los Alamos National Laboratory},
Month = {November},
Note = {slides for presentation},
Number = {LA-UR-11-11980},
Title = {PISTON: A Portable Cross-Platform Framework for Data-Parallel Visualization Operators},
Year = {2011}
}

Invited Presentation, "Data Infrastructure for Massive Scientific Visualization and Analysis", 2011 Extremely Large Databases (XLDB) Conference, October 18-19, 2011.[PDF]

Invited Presentation, "Visualization and Data Analysis in the Extreme Scale Era", SciDAC 2011, July 12, 2011 [PDF]

Invited Presentation, "Extreme Scale Computing and Biosurveillance", Panel V: Global Biosurveillance Information Science and Technology, January 2011. [PDF][BibTeX]

@techreport {,
author =    	"Ahrens, James and Daniels, Marcus"
title =     	"Extreme Scale Computing and Biosurveillance"
institution = 	"Los Alamos National Laboratory"
month =     	"January"
year =      	"2011"
}

2010

Invited Presentation, "Data-Intensive Computing on Numerically-Intensive Supercomputers", 2010 SuperComputing, Nov. 2010. [PDF][BibTeX]

@techreport {,
author =    	"Ahrens, James and Fasel, Patricia and Habib, Salman and Heitmann, Katrin and Hsu, Chung-Hsing and Lo, Li-Ta and Patchett, John and Williams, Sean and Woodring, Jonathan and Wu, Joshua"
title =     	"Data-Intensive Computing on Numerically-Intensive Supercomputers"
institution = 	"Los Alamos National Laboratory"
month =     	"Nov"
year =      	"2010"
}

Invited Presentation, "A Report Documenting the Completion of the Los Alamos National Laboratory Portion of the ASC Level II Milestone 'Visualization on the Supercomputing Platform'", ASC Level II Milestone Meeting. August 13, 2010. [PDF][BibTeX]

@techreport {,
author =    	"Ahrens, James and Patchett, John and Lo, Li-Ta and DeMarle, David and Brownlee, Carson and Mitchell, Christopher"
title =     	"A Report Documenting the Completion of the Los Alamos National Laboratory Portion of the ASC Level II Milestone
'Visualization on the Supercomputing Platform'"
institution = 	"Los Alamos National Laboratory"
month =     	"August"
year =      	"2010"
}

2009

Invited Presentation, "Increasing Model Efficiency for High-Resolution Baron Fork Simulations Using Basin Structure Characteristics", 9th Annual SAHRA Meeting, September 23-24, 2009, Tucson, AZ. [PDF][BibTeX]

@techreport {,
author =    	"Mniszewski, Susan and Fasel, Patricia and Vivoni, Enrique and White, Amanda and Springer, Everett"
title =     	"Increasing Model Efficiency for High-Resolution Baron Fork Simulations Using Basin Structure Characteristics"
institution = 	"Los Alamos National Laboratory"
month =     	"September"
year =      	"2009"
}

Member of Panel, "The Impact of Future Hardware on Visualization", IEEE Visualization 2009.

Panel Organizer, "Challenges in Large Data Visualization: A Visualization Community Call to Action", IEEE Visualization 2009.

Invited Luncheon Speaker, "Data-intensive Applications on Numerically-Intensive Supercomputers", Los Alamos Computer Science Symposium, October 2009.

Invited Presentation, "Visualization of Petascale Data: Data-Intensive Computing on Numerically-Intensive Supercomputers", Los Alamos CCS High-Performance Computing Review, June 2009.

Invited Presentation, "Visualization of Petascale Data: Data-Intensive Computing on Numerically-Intensive Supercomputers", Dagsthul, June 2009. From the Dagsthul website, "Dagstuhl is the world's premier venue for informatics. Dagstuhl enables the international elite, promising young researchers and practicians alike to gather together to discuss their views and research findings."

Invited Presentation, "Petascale Visualization: Approaches and Initial Results", SOS13 - Sandia, ORNL and the Swiss (SOS) supercomputing meeting, March 2009. [PDF][BibTeX]

@techreport {,
author =    	"Ahrens, James and Lo, Li-Ta and Nouanesengsy, Boonthanome and Patchett, John and McPherson, Allen"
title =    	"Petascale Visualization: Approaches and Initial Results"
institution = 	"Los Alamos National Laboratory"
month =     	"March"
year =      	"2009"
}

Invited Presentation, "Challenges and Opportunities: Data Analysis and Visualization for Materials Science", Decadal Challenges for Predicting and Controlling Materials Performance in Extremes – A Los Alamos MARIE planning workshop, Feb. 2009.

2008

J. Ahrens, L. Lo, B. Nouanesengsy, J. Patchett, A. McPherson, "Petascale visualization for Roadrunner platform: Approaches and initial results", Workshop on Ultrascale Visualization, pp.24-28, 16 Nov. 2008. [PDF][BibTeX]

@article{,
author = 	"Ahrens, James P. and Nouanesengsy, Boonthanome and Patchett, John and McPherson, Allen",
title = 	"Petascale visualization for Roadrunner platform: Approaches and initial results",
booktitle = 	"Proceedings of the 2008 Workshop on Ultrascale Visualization",
series = 	"UltraVis '08",
year = 		"2008",
month =		"November"
pages = 	"24--28",
numpages = 	"5",
}

Roadrunner Technical Seminars, Panel on Future Platforms,"Data Intensive Architectures", June 2008.

2007

Tutorial, CEA/EDF/INRIA summer school, "Methodes Avancees en Visualisation Scientifique", ParaView, 18-21 June 2007, Saint-Lambert-des-Bois, France.

2006

Invited Presentation, LANL Earth and Environmental Sciences Division, Frontiers in Geoscience Colloquium, "Scientific Visualization from Desktops to Petaflops", November 2006.

Invited Presentation, SC06 Workshop on Ultra-Scale Visualization, "Quantitative and Comparative Visualization Applied to Cosmological Simulations", November 2006. [PDF][BibTeX]

@article",
author = 	"Ahrens, James and Heitmann, Katrin and Habib, Salman and Ankeny, Lee and McCormick, Patrick and Inman, Jeff and Armstrong, Ryan and Ma, Kwan-Liu",
title = 	"Quantitative and comparative visualization applied to cosmological simulations",
journal = 	"Journal of Physics: Conference Series - Scientific Discovery Through Advanced Computing",
volume =	"46"
year = 		"2006",
pages = 	"526--534",
numpages = 	"9",
}

Invited Presentation, Office of Science - Scientific Discovery Through Advanced Computing Conference, "Quantitative and Comparative Visualization Applied to Cosmological Simulations", June 2006. [PDF][BibTeX]

2003

Member of panel on "Interoperability of Visualization Software and Data Models is Not an Achievable Goal", at IEEE Visualization 2003. [PDF][BibTeX]

@techreport {,
author =    	"Ahrens, James and Bethel, Wes and Abram, Greg and Shalf, John and Frank, Randy and Parker, Steve and Samatova, Nagiza",
title =    	"Interoperability of Visualization Software and Data Models is Not an Achievable Goal"
institution = 	"Los Alamos National Laboratory"
year =      	"2003"
}

2000

Member of panel on "Next-Generation Visualization Displays" at IEEE Visualization 2000. [PDF][BibTeX]

@techreport {,
author =    	"Ahrens, James and Papka, Michael and Stevens, Rick and Li, Kai and Reed, Daniel",
title =    	"Next-Generation Visualization Displays"
institution = 	"Los Alamos National Laboratory"
year =      	"2000"
}

1999

Invited presentation, "Using Linux Clusters for Parallel Visualization and Rendering", Extreme Linux Workshop, USENIX, June 1999.

Invited presentation, "An Evolving Infrastructure to Support Accelerated Strategic Computing Initiative (ASCI) Multi-Source Visualization and Data Analysis Needs", Ninth SIAM Conference on Parallel Processing for Scientific Computing, March 1999.

Invited article, A. McPherson, J. Painter, P. McCormick, J. Ahrens, C. Ragsdale, "Visualizations of Earth Processes for the American Museum of Natural History", Vol. 33, No. 1, Computer Graphics, February 1999. [PDF][BibTeX]

@article {,
author =    	"McPherson, Allen and Painter, James and McCormick, Patrick and Ahrens, James and Ragsdale, C.",
title =    	"Next-Generation Visualization Displays"
year =      	"2000"
journal = 	"Computer Graphics",
volume =	"33"
numpages = 	"10",
}

1998

Member of panel on "Multi-Source Data Analysis Challenges" at IEEE Visualization 1998. [PDF][BibTeX]

@article {,
author =    	"Ahrens, James and Uselton, Sam and Bethel, Wes and Treinish, Lloyd and State, Andrei",
title =		"Multi-Source Data Analysis Challenges"
year =      	"1998"
booktitle =	"IEEE VISUALIZATION '98",
numpages = 	"4",
}

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