Nonlinear Waves Seminar - Daniel Appelö

Feb. 13, 2018

An introduction to absorbing layers and non-reflecting boundary conditions. I will give an overview of different techniques to truncate unbounded domains by absorbing layers and non-reflecting or artificial boundary conditions. Among other topics I will describe the perfectly matched layer (PML) introduced in 1994 by Berenger (cited >10,000 times on...

Nonlinear Waves Seminar - Nick Ercolani

Dec. 7, 2017

Nick Ercolani, Department of Mathematics, University of Arizona Patterns, Defects and Phase Singularities The topic of this talk concerns understanding defect formation in spatially extended pattern-forming systems (such as Rayleigh-Benard Convection) that are far from equilibrium. We view these defects as coherent structures describable in terms of a phase order...

Nonlinear Waves Seminar - Alexei Cheviakov

May 18, 2016

Wednesday, May 18, 2016 3:00 PM - 4:00 PM Main Campus - Engineering Office Tower - 226: Applied Math Conference Room Main Campus - Engineering Classroom Wing - 257: Newton Lab Alexei Cheviakov, Department of Mathematics and Statistics, University of Saskatchewan, Canada Exact Solutions of a Fully Nonlinear Two-Fluid Model...

Nonlinear Waves Seminar - Igor Rumanov

April 19, 2016

Event Description: Igor Rumanov, Department of Applied Mathematics, University of Colorado Boulder A universal asymptotic regime in (2+1)-D hyperbolic nonlinear Schroedinger equation. Using numerical computations and analytical considerations based on similarity solutions, we demonstrate the appearance of a certain long-time regime in the (2+1)-dimensional hyperbolic nonlinear Schroedinger equation (HNLS). This...

Nonlinear Waves Seminar - Matthew Turner

April 12, 2016

Event Description: Matthew Turner, Department of Mathematics, University of Surrey Time-dependent conformal mappings with applications to nonlinear sloshing problems In this talk we examine two key features of time-dependent conformal mappings in doubly-connected regions, the evolution of the conformal modulus, Q(t), and the boundary transformation generalizing the Hilbert transform. Results...

Nonlinear Waves Seminar - Gregory Beylkin

April 5, 2016

Event Description: Gregory Beylkin, Department of Applied Mathematics, University of Colorado Boulder ACCURATE EVALUATION OF OSCILLATORY INTEGRALS Ubiquitous in a variety of applications, oscillatory integrals are typically evaluated via asymptotic expansions rather than via quadratures. The obvious reason is that for such integrals the standard quadrature rules are highly inefficient...

Nonlinear Waves Seminar - Angelo Mascarenhas

March 29, 2016

Event Description: Angelo Mascarenhas, National Renewable Energy Laboratory (NREL) Golden, Colorado Consequences of Spatial Antisymmetry on Light Light propagation in two and three dimensional lattices for which the index of refraction exhibits spatial antisymmetry is investigated in the ray and photonic crystal regimes. In these regimes, all the two dimensional...

Nonlinear Waves Seminar - Richard Moore

March 15, 2016

Event Description: Richard Moore , Department of Mathematics, New Jersey Institute of Technology Accounting for radiation in rare events produced by stochastic soliton dynamics Importance sampling using open-loop feedback based on maximum likelihood paths has been demonstrated to improve the efficiency of Monte Carlo estimation of rare event probabilities by...

Nonlinear Waves Seminar - Baowen Li

March 1, 2016

Tuesday, March 01, 2016 4:00 PM - 5:30 PM Main Campus - Engineering Office Tower - 226: Applied Math Conference Room Baowen Li, Department of Mechanical Engineering , University of Colorado Boulder Phononics: manipulating phonons with electronic analog The discovery of electronic transistor has changed our daily life in many...

Nonlinear Waves Seminar - Willy Hereman

Feb. 23, 2016

Event Description: Willy Hereman , Department of Applied Mathematics and Statistics , Colorado School of Mines Symbolic Computation of Scaling Invariant Lax Pairs in Operator Form for Completely Integrable Systems Based on scaling symmetry properties, a direct method to compute Lax pairs in operator form for completely integrable systems will...

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