Jan Mandel/Blog/2012 Jan Mar

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Contents

January 4: Janus cluster

January 5: NSF changes

The proposal peer review system as it exists now seems to be dying. What will they use instead?

Proposal success rates

Biology preproposals

CREATIV

January 6: ICCS paper

January 8: Level set methods in Matlab

January 11: EnKF convergence paper appeared

January 18: Work in progress

  • ICCS paper
  • Megafires paper
  • EGU abstract

January 19: Recruiting new PhD students for Teaching Assistantships

January 23: Data assimilation seminar: Square root ensemble filters

January 29: Reading some papers

Transformations that preserve exchangeability

An important component in our EnKF convergence proof Mandel-2011-CEK doi ucd was that the ensemble is exchangeable. It stands to reason that it should be. Is the ensemble exchangeable for the square root ensemble Kalman filter? If X=[x1,...,xN] exchangeable random elements, what about their linear combinations XT? Such T form an ideal containing all permutation matrices and the matrix of all ones, but is there anything else? The EAKF can be interpreted as AX which is always exchangeable (except for the little trouble when X is rank deficient, not sure what then)

February 4: About proposal writing and funding rates, again

February 6: Data assimilation seminar: Convergence of the ensemble Kalman filter and exchangeability of the ensemble

February 13: Data assimilation seminar: Bryan Smith

  • Towards an ENKF on a Riemannian Manifold: Tensors and Parallel Vector Fields - Part 2
  • notes

February 20: Data assimilation seminar: Ensemble filters and random elements in a Hilbert space

February 27: Data assimilation seminar: Ensemble filters and random elements in a Hilbert space

March 5: Data assimilation seminar: Loren Cobb

March 9: Finishing the ICCS 2012 paper

March 9: Finishing the fuel moisture code

March 10: Global optimization

March 12: Data assimilation seminar: Ensemble filters and random elements in a Hilbert space

March 15: NCAR IMAGE Seminar: Emmanuel Cosme

March 17: Bibliographies in the daseminar repository

March 19: Data assimilation seminar: Loren Cobb

  • discussion of the NCAR seminar from the last week and other topics
  • it is Spring Break!

March 22: OSX Lion annoyances

I wrote "parallel loops" (or so I thought) and the email went outsaying "parlor loos". Why?

OSX Lion seems to have an aggressive spellchecker/autocompletion that makes unwanted changes as you type without asking. It seems to interfere with typing in any application that comes with Lion. It disagrees with many technical terms and to convince it you need to return to the typed text and edit it again. One more major Lion annoyance, right there with file locking.

Watch out...

March 23: The magic of doing one thing at a time

March 25: Moisture paper

March 26: Discrete Mathematics Seminar: Anatolii Puhalskii

Some asymptotics for connected components of a sparse random graph

See also

March 26: Data assimilation seminar: Ensemble filters and random elements in a Hilbert space

March 26: Data assimilation for wildfires and fuzzy logic

See also

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