Amit ChourasiaVisualization 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.

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 ScientistsResearch Intern

1 Research Scientist

ImagesAnimationsMovies

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

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

http://visservices.sdsc.edu http://www.syncenter.org http://visservices.sdsc.edu/projects http://visservices.sdsc.edu/software http://visservices.sdsc.edu/software/

installed.php

Thanks for your patience

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Web: http://visservices.sdsc.edu/