Simulation Informatics @ SIAMUQ

We’ve had great audience participation for our minisymposium at SIAM UQ 2012 so far!

There were 20-30 people in the audience throughout the entire mini-symposium.

Here’s a log of what’s going on!

5:30pm We had to cutoff questions for Barnabas’s talk! Please discuss here if you are interested.

5:35pm Qiqi Wang is now talking about unconventional information in simulations

5:37pm Qiqi on data and simulation: “This is the way we envision the future is going to be”

5:40pm Still Qiqi … “When you go to a chaotic dynamical system, [the adjoint method] breaks down.”  “Let me tell you the solution we just worked out.”

5:42pm When you use time-averaging, you get a smaller magnitude of noise, but that makes the derivative of the noise larger (10^100)!.  The difference between the finite time average and the infinite time average suffers from the butterfly effect, and this is a huge problem.

5:45pm Qiqi’s talk is too interesting, I need to pay attention now.  The video will be online soon 🙂

5:55pm Qiqi is solving challenges on how to get information out of unsteady simulations.

6:00pm Chandrika Kamath is starting to talk about scientific data mining.

6:03pm Kamath – “80-90% of the time is spent in data processing” [in scientific data mining]

6:07pm Kamath – classifying Poincare orbits is a tough challenge due to multi-scale and fractal patterns in the data, not to mention noise

6:09pm Kamath – feature building for the Poincare orbits include using polar coordinates to exaggerate some features and using residuals in polynomial fits

6:13pm Kamath – using parallel plots help to identify useful regions in a object by feature matrix

6:15pm Kamath – using 5-6 features incredibly good performance

6:15pm Kamath – Rayleigh-Taylor instabilities, 30TB and 80TB of data.  These are big problems!

6:17pm The problem – finding bubbles and spikes in tubulence data – isn’t even well defined.  They used image analysis techniques.

6:22pm Darn, we lost the video (out of battery) for the end of Chandrika’s talk.



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