From kutz at uw.edu Tue Jul 26 02:29:11 2022 From: kutz at uw.edu (J. Nathan Kutz) Date: Thu Mar 7 20:17:34 2024 Subject: [Amath-seminars] Special Seminar: Peter Baddoo, MIT Message-ID: <0AC04934-1C88-4E7C-A30C-5C0E53021DB8@uw.edu> Hi All Peter Baddoo from MIT will be visiting UW for a couple of weeks and will give a seminar on Friday, August 12th at 230pm (ECE 303) Speaker: Peter Baddoo, MIT Title: Understanding interacting airfoils: complex analysis, asymptotics, and dynamics Abstract: When two or more airfoils move together, their interactions significantly affect the characteristics of the surrounding fluid. We develop a mathematical theory for these interactions using conformal maps, multiply-connected function theory, and modified Schwarz problems. Via use of the transcendental Schottky?Klein prime function, our theory is valid for any connectivity (any number of airfoils). Accordingly, our approach is very general and permits many airfoil motions (pitching, heaving, undulatory) and configurations (tandem, in-line, ground effect). We focus on the doubly-connected case where there are two interacting swimmers and find that our theory yields excellent agreement with experimental data. We also derive an asymptotic solution that captures the salient features of the prime function solution, along with a reduced-order dynamical system that explains the airfoils? trajectories. From kutz at uw.edu Thu Aug 11 10:54:35 2022 From: kutz at uw.edu (J. Nathan Kutz) Date: Thu Mar 7 20:17:34 2024 Subject: [Amath-seminars] Peter Badoo talk tomorrow (Aug. 12th) In-Reply-To: <1B5CC286-1D1E-46B5-90D0-3CFC737AC0B4@uw.edu> References: <1B5CC286-1D1E-46B5-90D0-3CFC737AC0B4@uw.edu> Message-ID: Hi All Reminder that tomorrow Peter Badoo will be giving a talk in ECE 303 at 230. You can also join via zoom. Join Zoom Meeting https://us02web.zoom.us/j/7175194479 Meeting ID: 717 519 4479 Best Nathan > On Jul 26, 2022, at 2:29 AM, J. Nathan Kutz wrote: > > > Hi All > > Peter Baddoo from MIT will be visiting UW for a couple of weeks and will give a seminar on Friday, August 12th at 230pm (ECE 303) > > > Speaker: Peter Baddoo, MIT > > Title: Understanding interacting airfoils: complex analysis, asymptotics, and dynamics > > Abstract: When two or more airfoils move together, their interactions significantly affect the characteristics of the surrounding fluid. We develop a mathematical theory for these interactions using conformal maps, multiply-connected function theory, and modified Schwarz problems. Via use of the transcendental Schottky?Klein prime function, our theory is valid for any connectivity (any number of airfoils). Accordingly, our approach is very general and permits many airfoil motions (pitching, heaving, undulatory) and configurations (tandem, in-line, ground effect). We focus on the doubly-connected case where there are two interacting swimmers and find that our theory yields excellent agreement with experimental data. We also derive an asymptotic solution that captures the salient features of the prime function solution, along with a reduced-order dynamical system that explains the airfoils? trajectories. -------------- next part -------------- An HTML attachment was scrubbed... URL: From svfleet at uw.edu Thu Sep 29 11:25:36 2022 From: svfleet at uw.edu (Samuel Van Fleet) Date: Thu Mar 7 20:17:34 2024 Subject: [Amath-seminars] First Boeing Seminar: Lexing Ying Message-ID: Dear all, Our first Boeing Seminar will be Thursday October 6th from 4 pm to 5 pm, and will be given by Professor Lexing Ying of Stanford University https://web.stanford.edu/~lexing/. The talk will be held in person in Smith Hall 205. To sign up for a meeting with Prof. Ying please use the following google doc: https://docs.google.com/document/d/1N85ym1LGebik3hIqIzt4G7_OPDsViIUa6nw5zQUp6Jk/edit?usp=sharing Best, Sam -- Sam Van Fleet (he/him/his) Acting Instructor of Applied Mathematics Department of Applied Mathematics University of Washington Seattle WA 98195 -------------- next part -------------- An HTML attachment was scrubbed... URL: From svfleet at uw.edu Fri Sep 30 12:12:58 2022 From: svfleet at uw.edu (Samuel Van Fleet) Date: Thu Mar 7 20:17:34 2024 Subject: [Amath-seminars] First Boeing Seminar: Lexing Ying In-Reply-To: References: Message-ID: Hello Everyone, Regarding the Boeing Seminar on October 6th, the title and abstract of Professor Lexing Ying's talk are: *Title: *Correcting Convexity Bias *Abstract: *We consider the problem of estimating a function or functional of an unknown input when only noisy observations of the input are available. When the function is convex (or concave) near the unknown input, the naive estimator often incurs a significant bias. We propose new estimators based on bootstrap to reduce this convexity bias. Theoretical analysis are conducted to show that the proposed methods can strictly reduce the expected estimate error under mild conditions. They can serve as off-the-shelf tools for a wide range of problems, including optimization problems with random objective functions or constraints, functionals of probability distributions such as the entropy and the Wasserstein distance, and matrix functions such as inversion. Best, Sam Van Fleet On Fri, Sep 30, 2022 at 12:04 PM Tony Garcia wrote: > Thank you! Don't worry about sending the link to the sign up sheet for > this too :) > > On Fri, Sep 30, 2022 at 12:02 PM Samuel Van Fleet wrote: > >> Oh shoot! Yes I can do that. >> >> On Fri, Sep 30, 2022 at 10:19 AM Tony Garcia wrote: >> >>> Hi Sam, >>> >>> Thank you for sending this out! One thing I would say, however is that >>> we need to make sure we include the talk's information (title & abstract) I >>> wouldn't worry about the sign up sheet here. >>> >>> Would it be possible to follow up with the title and abstract of the >>> talk? >>> >>> Thank you, >>> Tony >>> >>> On Thu, Sep 29, 2022 at 11:26 AM Samuel Van Fleet >>> wrote: >>> >>>> Dear all, >>>> >>>> Our first Boeing Seminar will be Thursday October 6th from 4 pm to 5 >>>> pm, and will be given by Professor Lexing Ying of Stanford University https://web.stanford.edu/~lexing/ >>>> [web.stanford.edu] >>>> >>>> . >>>> >>>> The talk will be held in person in Smith Hall 205. To sign up for a >>>> meeting with Prof. Ying please use the following google doc: >>>> >>>> https://docs.google.com/document/d/1N85ym1LGebik3hIqIzt4G7_OPDsViIUa6nw5zQUp6Jk/edit?usp=sharing >>>> [docs.google.com] >>>> >>>> >>>> Best, >>>> Sam >>>> >>>> -- >>>> Sam Van Fleet (he/him/his) >>>> Acting Instructor of Applied Mathematics >>>> Department of Applied Mathematics >>>> University of Washington >>>> Seattle WA 98195 >>>> >>>> >>> >>> -- >>> >>> TONY GARCIA (he/him/his) >>> Administrative Assistant III >>> Applied Mathematics >>> >>> Lewis Hall Box 353925 >>> 206.685.9620 >>> tonyg2@uw.edu >>> >>> >> >> -- >> Sam Van Fleet (he/him/his) >> Acting Instructor of Applied Mathematics >> Department of Applied Mathematics >> University of Washington >> Seattle WA 98195 >> >> > > -- > > TONY GARCIA (he/him/his) > Administrative Assistant III > Applied Mathematics > > Lewis Hall Box 353925 > 206.685.9620 > tonyg2@uw.edu > > -- Sam Van Fleet (he/him/his) Acting Instructor of Applied Mathematics Department of Applied Mathematics University of Washington Seattle WA 98195 -------------- next part -------------- An HTML attachment was scrubbed... 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