From rjl at amath.washington.edu Wed Jan 6 15:30:19 2010
From: rjl at amath.washington.edu (Randy LeVeque)
Date: Tue Jun 12 13:43:54 2018
Subject: [Amath-seminars] Kirsten Fagnan's Thesis Defense Jan 14
Message-ID:
--------------------------------------------------------------------
PhD Thesis Defense
--------------------------------------------------------------------
Speaker: ? ?Kirsten Fagnan
Title: ? ? ? ? ?High-resolution Finite Volume Methods for
Extracorporeal Shock Wave Therapy
Time: ? ? ? ? 10:30 am
Place: ? ? ? ?108 Fishery Sciences Building
? ? ? ? ? ? ? ? ?( Near Recycled Cylces, UW police and Agua Verde -
Map: http://www.washington.edu/maps/?l=FSH)
Abstract:
Extracorporeal Shock Wave Therapy (ESWT) is a noninvasive treatment
for bone fractures that fail to heal, necrotic wounds and strained
tendons. ?ESWT similar to lithotripsy, a non-surgical treatment for
kidney stone pulverization. ?In this treatment a shock wave is
generated in waterand then focused using an acoustic lens or reflector
so the energy of the wave is concentrated in a small region. This
technique has been used since the 1980's, but the underlying
biological mechanisms are still being explored. ?In this thesis we
have computationally investigated shock wave propagation in ESWT by
solving a Lagrangian form of the Isentropic Euler equations in the
fluid and linear elasticity in the bone using high-resolution finite
volume methods. We have also incorporated tissue-like materials into
the model through variation of the parameters in the Tait equation of
state. ?This work differs from prior modeling of ESWT in that we are
solving a full three-dimensional system of equations so we can model
complex bone geometries, and our formulation of the equations enables
us to investigate shear stresses generated within the bone.
In this talk I will give a brief overview of shock wave therapy, and
prior modeling efforts. ?Then I'll discuss the set of equations we use
to model the wave propagation and show some results validating this
approach. ?I will show results from three-dimensional calculations
that provide insight as to how doctors might optimize shock wave
therapy for nonunions and heterotopic ossifications. ?I will also give
a brief overview of the computational resources used to perform and
analyze the three-dimensional calculations. ?Finally, I will discuss
avenues for future work and other potential uses for the code we have developed.
From akb6 at washington.edu Mon Jan 11 11:34:03 2010
From: akb6 at washington.edu (Andrea Barreiro)
Date: Tue Jun 12 13:43:54 2018
Subject: [Amath-seminars] Boeing Seminar - Thursday Jan. 14 - Charlie
Doering
Message-ID: <05A14F83-BFCC-4F45-BE89-610E4B253815@washington.edu>
Hello everyone and welcome back to a new quarter of exciting Boeing
seminars!
The first Boeing Distinguished Lecture of the quarter will take place
this Thursday, Jan. 14, at 4:00 pm in 220 Guggenheim.
Please join us for a reception afterwards on the 4th floor of
Guggenheim.
---------------------------------------------------------------------------------------------------
"Heat Rises: Convection, Stability, and Turbulence"
Charles R. Doering
Department of Mathematics, Department of Physics,
and Center for the Study of Complex Systems, University of Michigan
Rayleigh-B?nard convection is the buoyancy-driven flow that results
when a fluid is heated from below and cooled from above sufficiently
to destabilize the conduction state where the fluid is at rest. A key
experimental, theoretical, and mathematical challenge is to ascertain
the functional dependence of the heat transport on the applied
temperature drop and on the material parameters characterizing the
fluid. Turbulent convection is of particular interest. In this talk
we will review some of the history and scientific applications of
Rayleigh-B?nard convection, describe some theory and analysis
connecting notions of nonlinear stability to the statistical dynamics
of the highly unstable turbulent regime, and compare the results with
direct numerical simulations and laboratory experiments.
From rjl at amath.washington.edu Tue Jan 12 15:35:53 2010
From: rjl at amath.washington.edu (Randy LeVeque)
Date: Tue Jun 12 13:43:54 2018
Subject: [Amath-seminars] Fwd: Kirsten Fagnan's Thesis Defense Jan 14
In-Reply-To:
References:
Message-ID:
Reminder message since the original was missing the date!
---------- Forwarded message ----------
From: Randy LeVeque
Date: Wed, Jan 6, 2010 at 3:30 PM
Subject: Kirsten Fagnan's Thesis Defense Jan 14
To: AMath Seminars
--------------------------------------------------------------------
PhD Thesis Defense
--------------------------------------------------------------------
Speaker: ? ?Kirsten Fagnan
Title: ? ? ? ? ?High-resolution Finite Volume Methods for
? ? ? ? ? ? ? ? Extracorporeal Shock Wave Therapy
Time: ? ? ? ? 10:30 am, Thursday January 14, 2010
Place: ? ? ? ?108 Fishery Sciences Building
? ? ? ? ? ? ? ? ?( Near Recycled Cylces, UW police and Agua Verde -
? ? ? ? ? ? ? ? ? Map: http://www.washington.edu/maps/?l=FSH)
Abstract:
Extracorporeal Shock Wave Therapy (ESWT) is a noninvasive treatment
for bone fractures that fail to heal, necrotic wounds and strained
tendons. ?ESWT similar to lithotripsy, a non-surgical treatment for
kidney stone pulverization. ?In this treatment a shock wave is
generated in waterand then focused using an acoustic lens or reflector
so the energy of the wave is concentrated in a small region. This
technique has been used since the 1980's, but the underlying
biological mechanisms are still being explored. ?In this thesis we
have computationally investigated shock wave propagation in ESWT by
solving a Lagrangian form of the Isentropic Euler equations in the
fluid and linear elasticity in the bone using high-resolution finite
volume methods. We have also incorporated tissue-like materials into
the model through variation of the parameters in the Tait equation of
state. ?This work differs from prior modeling of ESWT in that we are
solving a full three-dimensional system of equations so we can model
complex bone geometries, and our formulation of the equations enables
us to investigate shear stresses generated within the bone.
In this talk I will give a brief overview of shock wave therapy, and
prior modeling efforts. ?Then I'll discuss the set of equations we use
to model the wave propagation and show some results validating this
approach. ?I will show results from three-dimensional calculations
that provide insight as to how doctors might optimize shock wave
therapy for nonunions and heterotopic ossifications. ?I will also give
a brief overview of the computational resources used to perform and
analyze the three-dimensional calculations. ?Finally, I will discuss
avenues for future work and other potential uses for the code we have developed.
From shlizee at uw.edu Wed Jan 13 01:15:28 2010
From: shlizee at uw.edu (Eli Shlizerman)
Date: Tue Jun 12 13:43:54 2018
Subject: [Amath-seminars] AMATH seminar Jan 14: Charlie Doering: ROOM CHANGE
Message-ID: <9711eeb91001130115jf400da5t20fdd910162941fa@mail.gmail.com>
Dear All,
There is a room change for the Boeing seminars series in the winter quarter.
It will now be in *134 Sieg Hall* (next to Guggenheim). An updated
announcement is below.
Sincerely,
Andrea Barreiro and Eli Shlizerman
---------------------------------------------------------------------------------------------------
Hello everyone and welcome back to a new quarter of exciting Boeing
seminars!
The first Boeing Distinguished Lecture of the quarter will take place this
Thursday, Jan. 14, at 4:00 pm in 134 Seig Hall.
Please join us for a reception afterwards on the 4th floor of Guggenheim.
---------------------------------------------------------------------------------------------------
"Heat Rises: Convection, Stability, and Turbulence"
Charles R. Doering
Department of Mathematics, Department of Physics,
and Center for the Study of Complex Systems, University of Michigan
Rayleigh-B?nard convection is the buoyancy-driven flow that results when a
fluid is heated from below and cooled from above sufficiently to destabilize
the conduction state where the fluid is at rest. A key experimental,
theoretical, and mathematical challenge is to ascertain the functional
dependence of the heat transport on the applied temperature drop and on the
material parameters characterizing the fluid. Turbulent convection is of
particular interest. In this talk we will review some of the history and
scientific applications of Rayleigh-B?nard convection, describe some theory
and analysis connecting notions of nonlinear stability to the statistical
dynamics of the highly unstable turbulent regime, and compare the results
with direct numerical simulations and laboratory experiments.
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From shlizee at uw.edu Sun Jan 31 22:17:17 2010
From: shlizee at uw.edu (Eli Shlizerman)
Date: Tue Jun 12 13:43:54 2018
Subject: [Amath-seminars] Boeing Seminar - Thursday Feb. 4 - George
Papanicolaou
Message-ID: <9711eeb91001312217u16f67ed0k3e4c0fd58d680eda@mail.gmail.com>
Dear All,
The second Boeing Distinguished Lecture of the winter quarter will take
place this Thursday, Feb. 4, at 4:00 pm at *Sieg Hall 134*. Notice the
change in the location.
Please join us for a reception afterwards on the 4th floor of Guggenheim.
-------------------------------------------------------------------------------------------------------
Boeing Distinguished Lecture Series
"Imaging with noise"
George Papanicolaou,
Mathematics Department,
Stanford University
Time & Location:
Thursday, Feb. 4, at 4:00 pm at Sieg Hall 134
Abstract:
It is somewhat surprising at first that it is possible to locate a network
of sensors from cross correlations of noise signals that they record. This
is assuming that the speed of propagation in the ambient environment
is known and that the noise sources are sufficiently diverse. If the
sensor locations are known and the propagation speed is not known
then it can be estimated from cross correlation information. Although
a basic understanding of these possibilities had been available for some
time, it is the success of recent applications in seismology that have
revealed the great potential of correlation methods, passive sensors and
the constructive use of ambient noise in imaging. I will introduce these
ideas in an interdisciplinary, mathematical way and show that a great
deal can be done with them. Things become more complicated, and
a mathematically more interesting, when the ambient medium is also
strongly scattering. I will end with a review of what is known so far
in this case, and what might be expected.
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From akb6 at washington.edu Thu Feb 4 15:44:37 2010
From: akb6 at washington.edu (Andrea Barreiro)
Date: Tue Jun 12 13:43:54 2018
Subject: [Amath-seminars] REMINDER: Boeing Seminar - Thursday Feb. 4 -
George Papanicolaou
References: <2ECA2249-0422-4C5D-838F-F876C354FE85@washington.edu>
Message-ID:
Hello everyone,
Just a reminder G. Papanicolaou will be speaking in about 10 minutes,
in 134 Sieg Hall (see forwarded message for details).
Andrea
Begin forwarded message:
> From: Eli Shlizerman
> Date: January 31, 2010 10:17:17 PM PST
> To: amath-current@amath.washington.edu, amath-
> seminars@u.washington.edu
> Subject: Boeing Seminar - Thursday Feb. 4 - George Papanicolaou
>
> Dear All,
>
> The second Boeing Distinguished Lecture of the winter quarter will
> take place this Thursday, Feb. 4, at 4:00 pm at Sieg Hall 134.
> Notice the change in the location.
>
> Please join us for a reception afterwards on the 4th floor of
> Guggenheim.
>
> -------------------------------------------------------------------------------------------------------
> Boeing Distinguished Lecture Series
>
>
> "Imaging with noise"
>
> George Papanicolaou,
> Mathematics Department,
> Stanford University
>
> Time & Location:
> Thursday, Feb. 4, at 4:00 pm at Sieg Hall 134
>
> Abstract:
> It is somewhat surprising at first that it is possible to locate a
> network
> of sensors from cross correlations of noise signals that they
> record. This
> is assuming that the speed of propagation in the ambient environment
> is known and that the noise sources are sufficiently diverse. If the
> sensor locations are known and the propagation speed is not known
> then it can be estimated from cross correlation information. Although
> a basic understanding of these possibilities had been available for
> some
> time, it is the success of recent applications in seismology that have
> revealed the great potential of correlation methods, passive sensors
> and
> the constructive use of ambient noise in imaging. I will introduce
> these
> ideas in an interdisciplinary, mathematical way and show that a great
> deal can be done with them. Things become more complicated, and
> a mathematically more interesting, when the ambient medium is also
> strongly scattering. I will end with a review of what is known so far
> in this case, and what might be expected.
>
-------------- next part --------------
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From shlizee at uw.edu Mon Feb 22 11:31:31 2010
From: shlizee at uw.edu (Eli Shlizerman)
Date: Tue Jun 12 13:43:54 2018
Subject: [Amath-seminars] Boeing Seminar - Thursday Feb. 25 - Leslie
Greengard
Message-ID: <9711eeb91002221131q3a63447bvcaf2a04b7f522d29@mail.gmail.com>
Dear All,
Our next Boeing Distinguished Lecture of the winter quarter will take
place this Thursday, Feb. 25, at 4:00 pm at Sieg Hall 134. Notice the
change in the location.
Please join us for a reception afterwards on the 4th floor of Guggenheim.
-------------------------------------------------------------------------------------------------------
Boeing Distinguished Lecture Series
"A New Formalism for Electromagnetic Scattering in Complex Geometry"
Leslie Greengard
Courant Institute
New York University
Time & Location:
Thursday, Feb. 25, at 4:00 pm at Sieg Hall 134
Abstract:
We will describe some recent, elementary results in the theory of
electromagnetic scattering. There are two classical approaches that we
will review - one based on the vector and scalar potential and
applicable in arbitrary geometry, and one based on two scalar
potentials (due to Lorenz, Debye and Mie), valid only in the exterior
of a sphere. In extending the Lorenz-Debye-Mie approach to arbitrary
geometry, we have encountered
some new mathematical questions involving differential geometry,
partial differential equations and numerical analysis. This is joint
work with Charlie Epstein.
From hetmaniu at u.washington.edu Tue Feb 23 06:35:54 2010
From: hetmaniu at u.washington.edu (Ulrich Hetmaniuk)
Date: Tue Jun 12 13:43:54 2018
Subject: [Amath-seminars] J. Shadid's talk 02/23 (Room GUG 415L)
In-Reply-To:
References:
Message-ID: <44E19954-719A-4878-AB53-63F06DA8FAAB@u.washington.edu>
Dear All,
Please note the room change (GUG 415L)
On Tuesday 02/23, at 10:30 am, in GUG 415L, we will have a special
talk from John Shadid (SNL).
John will spend the day on campus. Please let me know if you would
like to meet with him.
Feel free to forward to this announcement.
Progress on the development of a scalable fully-implicit stabilized
unstructured
finite element (FE) capability for low-Mach-number resistive MHD.
John N. Shadid
Computational Science R&D Group
Sandia National Laboratories
Abstract:
This talk describes recent progress on the development of a scalable
fully-implicit stabilized unstructured finite element (FE) capability
for low-Mach-number resistive MHD. The brief discussion considers the
development of the stabilized FE formulation and the underlying fully-
coupled preconditioned Newton-Krylov nonlinear iterative solver. To
enable robust, scalable and efficient solution of the large-scale
sparse linear systems generated by the Newton linearization, fully-
coupled multilevel preconditioners are employed. The multilevel
preconditioners are based on two differing approaches. The first
algebraic multilevel technique employs a graph-based aggressive-
coarsening aggregation method applied to the nonzero block structure
of the Jacobian matrix. Initial results for a second approach that
utilizes approximate block decomposition methods and physics-based
preconditioning approaches will also be presented.
The performance of the multilevel preconditioners is compared to
standard variable overlap additive one-level Schwarz domain
decomposition type preconditioners. Parallel performance results are
presented for a set of challenging prototype problems that include the
solution of an MHD Faraday conduction pump, a hydromagnetic Rayleigh-
Bernard linear stability calculation, and a magnetic island
coalescence problem. Initial results that explore the scaling of the
solution methods are presented on up to 4096 processors for problems
with up to 64M unknowns on a CrayXT3/4. Additionally, a large-scale
proof-of-capability calculation for 1 billion unknowns for the MHD
Faraday pump problem on 24,000 cores is also presented.
Best regards,
Ulrich Hetmaniuk
From shlizee at uw.edu Mon Mar 8 10:29:07 2010
From: shlizee at uw.edu (Eli Shlizerman)
Date: Tue Jun 12 13:43:54 2018
Subject: [Amath-seminars] Applied Mathematics Seminar, Randall J. LeVeque,
March 11, 2010
Message-ID: <9711eeb91003081029g518f93eehe52c669b686005@mail.gmail.com>
Dear All,
This Thursday, March 11 at 4:00-5:00 pm at Sieg Hall 134 we will have
a seminar by Randy LeVeque from our department, initiating the
"Applied Mathematics Seminar" series - a talk given by a faculty
member in AMATH once a quarter.
Best Regards,
Andrea Barreiro and Eli Shlizerman
-------------------------------------------------------------------------------------------------------
Applied Mathematics Seminar
Randall J. LeVeque,
Applied Mathematics Department,
University of Washington
Location: Thursday, March 11, 2010, 4pm-5pm, Sieg Hall, rm 134
Title:
Finite-volume Methods and Software for Wave Propagation Problems
Abstract:
Wave propagation problems arise in nearly every field of science and
engineering: shock waves in supernovas or traffic flow, elastic waves
in earthquakes or ultrasound, water waves in tsunamis or storm surges,
blast waves in explosions or volcanoes, to name but a few. While the
applications may vary greatly, the mathematical structure of such
problems is often very similar: they can all be modeled by hyperbolic
partial differential equations that are often derived via conservation
of physical quantities such as mass, momentum, and energy.
For the past 15 years I have been working with collaborators (including
many UW students) on the development of a general open source software
package, Clawpack, for the solution of conservation laws and other
hyperbolic problems, using adaptive mesh refinement to allow much greater
resolution where needed. We have also been working with researchers in
several departments at UW and elsewhere on the solution of specific problems.
In this talk I will give a flavor of the difficulties in solving nonlinear
hyperbolic equations and an overview of some current software projects
and applications, particularly in geophysics and biomechanics.
From rjleveque at gmail.com Tue Mar 9 11:44:40 2010
From: rjleveque at gmail.com (Randy LeVeque)
Date: Tue Jun 12 13:43:54 2018
Subject: [Amath-seminars] AMath Seminar by LeVeque postponed to April 22 /
talk by Denlinger this week
Message-ID:
My talk, previously announced as happening this Thursday, is being
postponed to April 22 at 4pm in GUG 220. It turns out there's a
conflict with a talk by one of my collaborators, who is speaking this
Thursday at 3:30pm in the Earth and Space Sciences Department. I'd
like hear Roger's talk and others may also find it of interest:
Thursday, March 11, 2010 at 3:30pm
JHN 102, ESS Seminar Series
Roger Denlinger, Geophysicist, United States Geological Survey, Vancouver, WA
Title: "Castastrophic inundation and slow drainage: the story of the
Missoula Floods"
Also, please note that the Boeing Distinguished Applied Mathematics
Colloquium by A. Fokas of Cambridge that was originally scheduled for
April 22 has been moved to April 1. See
http://www.amath.washington.edu/events/boeing/ for the Boeing talks
or http://www.amath.washington.edu/events/ for the schedule of all AMath talks.
Sorry for the confusion!
- Randy LeVeque
From shlizee at uw.edu Tue Mar 30 10:03:13 2010
From: shlizee at uw.edu (Eli Shlizerman)
Date: Tue Jun 12 13:43:54 2018
Subject: [Amath-seminars] Boeing Seminar - Thursday April 1 - Athanasios
Fokas
Message-ID: <9711eeb91003301003k7c8eb875hd338df86893db5df@mail.gmail.com>
Dear All,
Our first Boeing Distinguished Lecture of the spring quarter will take
place this Thursday, April 1, at 4:00 pm at Guggenheim Hall room 220.
Notice that we are back to the usual lecture room.
Please join us for a reception afterwards on the 4th floor of Guggenheim.
-------------------------------------------------------------------------------------------------------
Boeing Distinguished Lecture Series
"Integrability, Medical Imaging, and Boundary Value Problems"
Athanasios Fokas
Cambridge University
Time & Location:
Thursday, April 1, at 4:00 pm at Guggenheim Hall 220
Abstract:
Ideas and techniques of Integrability have had a significant impact in
several areas of science and engineering. In this lecture, two such
applications will be reviewed: (a) an analytical approach to certain
important medical imaging techniques; (b) a unified approach to analyzing
boundary value problems. The latter approach unifies the fundamental
contribution to the analytical solution of PDEs of Fourier, Cauchy and
Green, and also presents a non-linearization of some of these results.