Amit Chourasia Visualization Scientist San Diego Supercomputer Center Presented at : Cyberinfrastructure Internship Experiences for Graduate Students Spring.

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Presentation transcript:

Amit Chourasia Visualization Scientist San Diego Supercomputer Center Presented at : Cyberinfrastructure Internship Experiences for Graduate Students Spring Orientation Workshop – April 23-27, 2007 Visualization Services

Mission Statement Advance Science through the creation and dissemination of high-quality explanatory visualizations. Advance Visualization through creation of improved production tools and processes.

Compute Resources at SDSC Machine# ProcsMemoryDiskPeak Perf. Datastar (p-series) TB112 TB15.6 TFlops Blue-Gene- Data TB19.5 TB17.2 TFlops Teragrid (Itanium2) 5121 TB39 TB3.1 TFlops

Storage Resources at SDSC MachineMemoryDiskPeak Perf. HPSS (tape) 256 GB18 PB0.3 TFlops Sam QFS (tape) 288 GB39 TB0.15 TFlops

Large? Data? What kind of data? Simulations of earthquakes, CFD, astrophysics, molecular modeling, etc Floating point How large? Time varying and multivariate (1000’s of timesteps) Usually 10’s of TB >1024x1024x1024 floats

Problems How to verify and validate ? How to analyze ? How to gain scientific insight ? How to share information among experts and non-experts ?

Understanding Data Large amount of numbers don’t make much sense to humans Visual information can encode large amount of numbers to gain insight Low Bandwidth High Bandwidth

Scientific Visualization Short Def. – is the presentation of data graphically as a means of gaining understanding and insight about science. “Visual Representation and Abstraction of Scientific Data”

Seismic - TeraShake Simulation TeraShake 2.1 Comparison of TS1.2 – TS1.3 Short and simple Web Collab: SCEC

Seismic - SCEC Viz portal Collab: SCEC

Seismic - Puente Hills Simulation Movie Web Collab: SCEC

Seismic - Recreation of 1906 San Francisco Earthquake North Bound South Bound Collab: USGS

Climate Simulation River Flow 3D River Flow Top Collab: UCSD LLNL

CFD Simulation Collab: GaTech

Enzo – Universe Simulation Matter Density Dark Matter Density Temperature Collab: UCSD LLNL

Molecular Modelling Movie Collab: NREL

Real Data?

Cancer Center Visualization Visualization Expertise Supercomputers Software Development Visualization Tools Shared Staff SDSC UCSD Cancer Center Cancer Expertise Medical Expertise Latest Microscopy Tools Cancer Research Scientists Computational Scientists Research Intern 1 Research Scientist Images Animations Movies

The Cellular Imaging Gateway Web Portal for Cellular Imaging. Image generation. Animation creation. Analysis Functions. Distributed processing. Cluster integration. Remote operation

Core Features Complete access through standard web browser. Data set uploads from the microscope and desktop. Submit jobs to remote clusters. Review results as arrive. Notification of results Monitor results anywhere.

Seismic – 7 Story Building Original video Match Check Match Top Bottom Combined Perspective npr Roof npr Site 3d model Collab: NEES

Other Work

Example Imagery James R. Feramisco -Digital Imaging Resource Leader

Data Issues Data Formats Data Translation Data transfer and replication between archival and active file systems Data larger than memory available

Viz Issues Domain knowledge Multivariate data representation Temporal coherence Precision Loss (compression,etc) Interaction vs batch visualization Perceptual Issues Personal Bias (author & viewer)

Tools we use to Visualize Vista (SDSC/NPACI) – Batch Volume renderer Mesh Viewer (SDSC/NPACI) – Interactive Volume Renderer Autodesk’s Maya – 3D animation software Adobe’s suite (After Effects, Photoshop, Illustrator) Other things that work

Installed Tools Paraview VISTA GIMP GnuPlot ImageMagick RasMol Visit VTK Tecplot – in progress.

Does Viz work? Collab: SCEC

Does Viz work? Collab: SCEC

“Information is infinite” “Information overload” Joseph Kielman Science Advisor Dept. of Homeland Security Can’t win Can’t break even Can’t get out of the game Can Visualization help? Think Petascale Data Analysis

Why Is Visualization Unique? Fixed resolution and speed output device. No matter how much simulation data is produced the visual presentation is limited to a finite resolution and speed. Can play with that a little – IMAX, 60 fps but practically fixed.

Web Sites php

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