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[Fizinfo] FW: meghívó

Chronological Thread 
  • From: "Laszlo Dobos" <dobos AT>
  • To: <fizinfo AT>
  • Subject: [Fizinfo] FW: meghívó
  • Date: Fri, 21 Jul 2017 11:47:19 -0400

-----Original Message-----
From: Zsolt Sandor
[mailto:szsolt AT]

Sent: Friday, July 21, 2017 11:43 AM
To: Laszlo Dobos
<dobos AT>
Subject: meghívó


Az ELTE Matematikai Intézetének RENDKÍVÜLI intézeti szemináriumára az
MTA-ELTE Numerikus Analízis és Nagy Hálózatok Kutatócsoport és a Farkas
Miklós Alkalmazott Analízis Szeminárium támogatásával.

Randall J. LeVeque

Boeing Professor of Applied Mathematics

University of Washington

Marsha Berger
Courant Institute, NYU

Helyszín: Déli épület –1-820 Hajós terem
Időpont: 2017. július 31.- hétfő - 10.00 órai kezdet

Az előadások:

1. Előadás 10:00 órától – 11:00 óráig : Adjoint Error Estimation for Adaptive
Refinement of Hyperbolic PDEs

Előadó: Randall J. LeVeque, a SIAM Board of Trustees tagja valamint a SIAM
Journals Committee elnöke

Time-dependent hyperbolic partial differential equations can be efficiently
solved using adaptive mesh refinement, with a hierarchy of finer grid patches
in regions where the solution is discontinuous or rapidly varying. These
patches can be adjusted every few time steps to follow propagating waves.
For many problems the primary interest is in tracking waves that reach one
target location, perhaps after multiple reflections. The solution to an
adjoint equation solved backward in time from the target location can be used
to identify the regions that require refinement. These adjoint methods are
incorporated in the Clawpack software for general hyperbolic problems and
have been used in the GeoClaw software to track tsunami waves in the ocean
that will reach a particular community of interest.

2. előadás 11:15 órától – 12:15 óráig : Modeling and Simulation of
Asteroid-Generated Tsunamis

Előadó: Marsha Berger Courant Institute, NYU

In 2013, an uncharted asteroid exploded in the atmosphere over Chelyabinsk,
causing damage for a radius of 20 kilometers. We examine the question of what
would happen if an asteroid burst over water instead of land. Could it
generate a tsunami that would cause widespread damage far away?

We present numerical simulations using the GeoClaw software and the shallow
water equations in a variety of settings. We have a model problem with an
explicit solution that explains the phenomena found in the computations.
Finally, we discuss whether compressibility and dispersion are important
effects that should be included, and show results using the linearized Euler
equations that begin to address this.

  • [Fizinfo] FW: meghívó, Laszlo Dobos, 07/21/2017

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