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Title: Koopman Theory Applied to Ocean DataSpeaker: Larry J. Pratt, Ph.D., Senior Scientist, Woods Hole Oceanographic InstitutionAbstract: Koopman theory can be useful in the treatment of data from various fields of science and engineering. Applications include the formulation of data-based models, the analysis of data, reduction of order, and handling of certain types of big data. At the heart of the theory is the idea that for many nonlinear models there is an equivalent linear model in which the variables are “observables”. In physical oceanography, these variables consist of state variables (velocity, temperature, etc.) that we observe along with other measurable functions of the state variables: an infinitely long list. The linear model therefore operates in an infinite dimensional space of observation functions whose evolution in time is governed by a linear operator (the Koopman operator). This evlution takes a particularly simple form when voice in terms of the eigenvalues of the operator (Koopman modes) and the Dynamic Mode Decomposition is one method for approximating these modes. I will discuss the theoretical underpinning and implementation of this approach and give an example of application to numerical model data from the western Mediterranean Sea and Strait of Gibraltar, a region characterized by a number of time-dependent, nonlinear processes.

All are welcome to meet us for "Lunch Bunch" at noon in the Dining Hall or Rams Den.There is no registration required, just drop on by."Don't eat lunch alone! Meet new friends!"Visit URInvolved for complete event details.

URI Department of Art and Art History presentsREVELATIONS! Education: Behind The Curtain – In Words and Images Exhibition September 15- December 11Join us for a reception and art conversations on September 17 4:30-7 in Lippitt Hall 401What is it like being in the classroom? What challenges do educator’s face? What restrictions are there preventing education from occurring? Are the requirements, expectations and limitations changing the way Educators function? What are the successes - giving students the opportunity to find their expressive voice?This exhibit will include the artwork and voices of a group of area educators from public, private and independent educational settings on all levels. The artist/educators will share their creative voices in various forms of expression as they also reflect on the challenges and celebrations they experience in and out of the classroom.Among the more than twenty artists are: Mary Jane Andreozzi, Deanna Camputaro, Ruth Clegg, Raff Diaz, Raphael Diaz, Tamara Diaz, Melanie Ducharme, Adam Ferbert, Susan Garland, Melissa Guillet, Catherine Davis-Hayes, Chris Kelley, Susan Kolenda, Jason Robert LaClair, Don Mays, Kerry Murphy, Sam Peck, Lisa Marie Ricci-Russo, Monique Rolle-Johnson, Jade Sisti, Janice Lee Strain, John Tedeschi, Katie Walck.On exhibit in URI Lippitt Hall (3rd & 4th floor), Green Hall and The Higgins Welcome CenterOpen To Monday – Friday 7:30-4:30, closed weekends and holidaysFor information: (401)286-4620/ spennell@uri.eduVisit URInvolved for complete event details.

URI Department of Art and Art History presentsREVELATIONS! Education: Behind The Curtain – In Words and Images Exhibition September 15- December 11Join us for a reception and art conversations on September 17 4:30-7 in Lippitt Hall 401What is it like being in the classroom? What challenges do educator’s face? What restrictions are there preventing education from occurring? Are the requirements, expectations and limitations changing the way Educators function? What are the successes - giving students the opportunity to find their expressive voice?This exhibit will include the artwork and voices of a group of area educators from public, private and independent educational settings on all levels. The artist/educators will share their creative voices in various forms of expression as they also reflect on the challenges and celebrations they experience in and out of the classroom.Among the more than twenty artists are: Mary Jane Andreozzi, Deanna Camputaro, Ruth Clegg, Raff Diaz, Raphael Diaz, Tamara Diaz, Melanie Ducharme, Adam Ferbert, Susan Garland, Melissa Guillet, Catherine Davis-Hayes, Chris Kelley, Susan Kolenda, Jason Robert LaClair, Don Mays, Kerry Murphy, Sam Peck, Lisa Marie Ricci-Russo, Monique Rolle-Johnson, Jade Sisti, Janice Lee Strain, John Tedeschi, Katie Walck.On exhibit in URI Lippitt Hall (3rd & 4th floor), Green Hall and The Higgins Welcome CenterOpen To Monday – Friday 7:30-4:30, closed weekends and holidaysFor information: (401)286-4620/ spennell@uri.eduVisit URInvolved for complete event details.