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Past Data Assimilation Seminars


Title: LeGland's convergence analysis of EnKF
Speaker(s): Jan Mandel
Affiliation: UCD Department of Mathematical and Statistical Sciences
When: Tuesday,  May 12, 2009
Time: 11:00 AM  -  1:00 AM
Where: CU building, Room 626


Title: Probability measures on Hilbert space
Speaker(s): Loren Cobb
Affiliation: UCD Department of Mathematical and Statistical Sciences
When: Tuesday,  May 26, 2009
Time: 11:00 AM  -  1:00 PM
Where: CU building, Room 626


Title: EnKF Convergence in Hilbert Space (continued)
Speaker(s): Jan Mandel
Affiliation: UCD Department of Mathematical and Statistical Sciences
When: Tuesday,  June 9, 2009
Time: 11:00 AM  -  1:00 PM
Where: CU building, Room 656


Title: EnKF Convergence in Hilbert Space
Speaker(s): Jan Mandel
Affiliation: UCD Department of Mathematical and Statistical Sciences
When: Tuesday,  June 30, 2009
Time: 11:00 AM  -  1:00 PM
Where: CU building, Room 626


Title: Wishart distribution
Speaker(s): Loren Cobb
Affiliation: UCD Department of Mathematical and Statistical Sciences
When: Tuesday,  July 21, 2009
Time: 11:00 AM  -  1:00 PM
Where: CU building, Room 656


Title: Kalman filter in Hilbert space
Speaker(s): Jonathan Beezley
Affiliation: UCD Department of Mathematical and Statistical Sciences
When: Tuesday,  July 28, 2009
Time: 11:00 AM  -  1:00 PM
Where: CU building, Room 626


Title: Convergence of Wishart
Speaker(s): discussion
Affiliation: UCD Department of Mathematical and Statistical Sciences
When: Thursday,  August 13, 2009
Time: 9:00 AM  -  11:00 AM
Where: CU building, Room 626

This is an informal discussion on the Wishart distribution and law of large numbers for Wishart samples with application to the convergence of the sample covariance. Other topics to be discussed include laws of large numbers in Hilbert and Banach spaces.


Title: Laws of large numbers and the Hilbert-Schmidt norm
Speaker(s): dicussion
Affiliation: UCD Department of Mathematical and Statistical Sciences
When: Thursday,  August 20, 2009
Time: 10:00 AM  -  12:00 PM
Where: CU building, Room 626


Title: Rademacher type p Banach spaces and weak laws of large numbers
Speaker(s): Jan Mandel
Affiliation: UCD Department of Mathematical and Statistical Sciences
When: Thursday,  August 27, 2009
Time: 10:00 AM  -  12:00 PM
Where: CU building, Room 626


Title: White noise and weak topologies on Hilbert space
Speaker(s): Jan Mandel
Affiliation: UCD Department of Mathematical and Statistical Sciences
When: Thursday,  September 3, 2009
Time: 10:00 AM  -  12:00 PM
Where: CU building, Room 626


Title: Geometry of Statistics and Central limit theorem in Banach spaces
Speaker(s): Loren Cobb
Affiliation: UCD Department of Mathematical and Statistical Sciences
When: Thursday,  September 10, 2009
Time: 10:00 AM  -  12:00 PM
Where: CU building, Room 626

NOTE: The seminar starts at 10AM. 1. Discussion of "The Geometry of Statistics" presentation from the Statistics Seminar

2. Central limit theorem in Banach spaces


Title: Filtering in infinite dimension
Speaker(s): Jan Mandel
Affiliation: UCD Department of Mathematical and Statistical Sciences
When: Thursday,  September 17, 2009
Time: 10:00 AM  -  12:00 PM
Where: CU building, Room 626


Title: Filtering in infinite dimension II: A roadmap to the proof of Kalman filter formulas in a Hilbert space
Speaker(s): Jan Mandel
Affiliation: UCD Department of Mathematical and Statistical Sciences
When: Thursday,  October 1, 2009
Time: 10:00 AM  -  12:00 PM
Where: CU building, Room 626


Title: Filtering in infinite dimension III: Filling the gaps
Speaker(s): discussion
Affiliation: UCD Department of Mathematical and Statistical Sciences
When: Thursday,  October 8, 2009
Time: 10:00 AM  -  12:00 PM
Where: CU building, Room 626

This is a follow-up to the previous seminar "A roadmap to the proof of Kalman filter formulas in a Hilbert space". We'll try to solve some of the problems posed there.


Title: Morphing and optimal statistical interpolation
Speaker(s): Jan Mandel
Affiliation: UCD Department of Mathematical and Statistical Sciences
When: Thursday,  October 15, 2009
Time: 10:00 AM  -  12:00 PM
Where: CU building, Room 626

I will introduce the basics of morphing and image registration as we use them in data assimilation.


Title: Image registration for data assimilation
Speaker(s): Jonathan Beezley
Affiliation: UCD Department of Mathematical and Statistical Sciences
When: Thursday,  October 22, 2009
Time: 10:00 AM  -  12:00 PM
Where: CU building, Room 626


Title: Morphing statistical interpolation with covariance by FFT
Speaker(s): Jan Mandel
Affiliation: UCD Department of Mathematical and Statistical Sciences
When: Thursday,  November 5, 2009
Time: 10:00 AM  -  12:00 PM
Where: CU building, Room 626


Title: Modeling and forecasting epidemics
Speaker(s): Loren Cobb
Affiliation: UCD Department of Mathematical and Statistical Sciences
When: Tuesday,  November 10, 2009
Time: 10:00 AM  -  12:00 PM
Where: CU building, Room 626

The purpose of this talk is to give enough background and information to use Loren's code (under development).

NOTE UNUSUAL DAY.


Title: Prototyping FFT data assimilation from very small samples
Speaker(s): Discussion
Affiliation: UCD Department of Mathematical and Statistical Sciences
When: Thursday,  November 19, 2009
Time: 10:00 AM  -  12:00 PM
Where: CU building, Room 626


Title: Connecting the data assimilation and model codes, and FFT in data assimilation
Speaker(s): all
Affiliation: UCD Department of Mathematical and Statistical Sciences
When: Thursday,  December 3, 2009
Time: 10:00 AM  -  12:00 PM
Where: CU building, Room 626

This is mostly a hands-on coding session to question, discuss, and test combinations of our codes: 1. enkf (matlab) 2. morphing (fortran) 3. fft data assimilation (matlab) 3. epidemic simulation (java) 4. weather-wildfire (fortran) If time allows, further discussion will deal with: 1. requirements for the cross-covariance 2. covariance models in the frequency domain 3. covariogram and its computation by the FFT (Marcotte, 1996)


Title: Data assimilation with small ensembles in weather-fire and epidemic models
Speaker(s): discussion
Affiliation: UCD Department of Mathematical and Statistical Sciences
When: Friday,  December 11, 2009
Time: 10:00 AM  -  11:45 AM
Where: CU building, Room TBD

We'll compare our notes and codes. PLEASE NOTE UNUSUAL DAY.


Title: Progress on implementation of data assimilation for epidemic and wildfire simulations
Speaker(s): Discussion
Affiliation: UCD Department of Mathematical and Statistical Sciences
When: Wednesday,  December 16, 2009
Time: 10:00 AM  -  12:00 PM
Where: CU building, Room 626


Title: Review of data assimilation - Part I
Speaker(s): Ashok Krishnamurthy
Affiliation: UCD Department of Mathematical and Statistical Sciences
When: Friday,  January 8, 2010
Time: 10:00 AM  -  12:00 PM
Where: CU building, Room 626

This talk will begin a survey of EnKF literature. Arter the talk, we'll continue working on the ICCS10 and MS10 conference papers, connect and test codes, etc.


Title: Review of data assimilation - Part II
Speaker(s): Ashok Krishnamurthy
Affiliation: UCD Department of Mathematical and Statistical Sciences
When: Thursday,  January 14, 2010
Time: 10:00 AM  -  12:00 PM
Where: CU building, Room 340

This talk will continue a survey of EnKF literature. Arter the talk, we'll continue working on the ICCS10 conference paper, connect and test the epidemic simulation and FFT EnKF codes, etc.


Title: Review of data assimilation - Part III
Speaker(s): Ashok Krishnamurthy
Affiliation: UCD Department of Mathematical and Statistical Sciences
When: Friday,  January 22, 2010
Time: 9:30 AM  -  11:30 AM
Where: CU building, Room 626


Title: TBD
Speaker(s): All
Affiliation: UCD Department of Mathematical and Statistical Sciences
When: Friday,  January 29, 2010
Time: 9:30 AM  -  11:30 AM
Where: CU building, Room

Possible topics include: 1. FFT EnKF (Jan), 2. Continue the review (Ashok), 3. Epidemic model (Loren), 4. EnKF in Hilbert spaces (Jan), a graphical EnKF demo (Volodymyr)


Title: Variational data assimilation
Speaker(s): Oscar Jenkins
Affiliation: UCD Department of Mathematical and Statistical Sciences
When: Friday,  February 5, 2010
Time: 9:30 AM  -  11:30 AM
Where: CU building, Room 626

Oscar will give a brief presentation about the basics of 3D VAR. Further topics, time and interest permitting: background for FFTEnKF and 1D EnKF demo (Volodymyr), FFTEnKF and covariance fitting (Jan), continuation of comparison of deterministic EnKFs (Ashok), discussion of epidemic models (Loren),...



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