BEGIN:VCALENDAR
PRODID:-//PSU Mathematics Department//Seminar iCalendar Generator//EN
VERSION:2.0
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:Computational and Applied Mathematics Colloquium
X-WR-TIMEZONE:America/New_York
BEGIN:VTIMEZONE
TZID:America/New_York
X-LIC-LOCATION:America/New_York
BEGIN:DAYLIGHT
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
TZNAME:EDT
DTSTART:19700308T020000
RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
TZNAME:EST
DTSTART:19701101T020000
RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160111T143000
DTEND;TZID=America/New_York:20160111T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=30229
SUMMARY:Computational and Applied Mathematics Colloquium - TBA
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: TBA\nAbstract Link: http://
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160118T143000
DTEND;TZID=America/New_York:20160118T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=30230
SUMMARY:Computational and Applied Mathematics Colloquium - TBA
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: TBA
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160125T143000
DTEND;TZID=America/New_York:20160125T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=30231
SUMMARY:Computational and Applied Mathematics Colloquium - cancelled
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: cancelled
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160201T143000
DTEND;TZID=America/New_York:20160201T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=30232
SUMMARY:Computational and Applied Mathematics Colloquium - Shape-Selective
Growth of Colloidal Nanocrystals: Multi-scale theory and Simulation
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: Shape-Selective Growth of Colloidal Nanocrystals: Multi-scale theory an
d Simulation\nSpeaker: Kristen A. Fichthorn\nAbstract: Achieving the contr
olled synthesis of colloidal nanomaterials with selected shapes and sizes
is an important goal for a variety of applications that can exploit their
unique properties (e.g.\, optical\, catalytic\, magnetic\, etc.). In the
past decade\, a number of promising solution-phase synthesis techniques ha
ve been developed to fabricate various nanostructures. A deep\, fundament
al understanding of the phenomena that promote selective growth and assemb
ly in these syntheses would enable tight control of nanostructure morpholo
gies in next-generation techniques. I will discuss our efforts to underst
and how colloidal nanostructures assume selective shapes during their synt
hesis. To highlight one of our research directions\, I will discuss our e
fforts to understand the workings of PVP\, a structure-directing molecule
that facilitates the formation of selective Ag nanoparticle shapes. In the
se studies\, we use first-principles density-functional theory\, molecular
dynamics (MD) simulations\, and continuum theory to predict PVP-induced A
g nanocrystal shapes in the 10-100 nm size range. [1-5] \n\nReferences\n[1
] W. Al-Saidi\, H. Feng\, and K. A. Fichthorn\, “Adsorption of polyvinyl
pyrrolidone on Ag surfaces: Insight into a structure-directing agent”\,
Nano Letters\, 2012\, 12\, 997-1001.\n[2] W. A. Saidi\, H. Feng\, and K. A
. Fichthorn\, “The binding of PVP to Ag surfaces: Insight into a structu
re-directing agent from dispersion-corrected density-functional theory\,
J. Phys. Chem. C\, 2013\, 117\, 1163-1171.\n[3] Y. Zhou\, W. A. Saidi\,
and K. A. Fichthorn\, “Comparison of the binding of PVP and PEO to Ag su
rfaces: Elements of a successful structure-directing agent”\, J. Phys.
Chem. C\, 2013\, 117\, 11444-11448.\n[4] Y. Zhou\, W. A. Saidi\, and K. A.
Fichthorn\, “A force field for describing the PVP-mediated solution-pha
se synthesis of shape-selective Ag nanocrystals”\, J. Phys. Chem. C\, 20
14\, 118\, 3366-3374.\n[5] X. Qi\, T. Balankura\, Y. Zhou\, and K. A. Fich
thorn\, “How structure-directing agents control nanocrystal shape: PVP-m
ediated growth of Ag nanocubes”\, Nano Letters 2015\, 15\, 7711–7717.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160208T143000
DTEND;TZID=America/New_York:20160208T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=30233
SUMMARY:Computational and Applied Mathematics Colloquium - Weak solutions t
o compressible Navier-Stokes
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: Weak solutions to compressible Navier-Stokes\nSpeaker: Pierre-Emmanuel
Jabin\, University of Maryland\nAbstract: I will give an overview of the g
lobal existence theory for weak solutions to the compressible Navier-Stoke
s equations. The main goal is to introduce the basic Lions and Feireisl's
theory and the connections with renormalized solutions and the well posed
ness theory for advection equations.\nSome recent developments and remaini
ng open questions will also be presented.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160215T143000
DTEND;TZID=America/New_York:20160215T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=30234
SUMMARY:Computational and Applied Mathematics Colloquium - Norm inflation i
n hydrodynamics
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: Norm inflation in hydrodynamics\nSpeaker: Dong Li\, UBC\nAbstract: I wi
ll discuss a number of recent results concerning the\nnorm inflation pheno
mena of fluid equations in various functional spaces. In\nparticular I wil
l focus on some new techniques to explore (beyond) the limitation of tradi
tional energy type methods. Time permitting I will also discuss some new d
evelopments in related\nKato-Ponce type inequalities and new fractional Le
ibniz rules. (Part\nof the work is joint with Jean Bourgain).
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160222T143000
DTEND;TZID=America/New_York:20160222T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=30235
SUMMARY:Computational and Applied Mathematics Colloquium - Some recent deve
lopments on numerical methods for second order fully nonlinear PDEs
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: Some recent developments on numerical methods for second order fully no
nlinear PDEs\nSpeaker: Xiaobing H. Feng\, University of Tennessee\nAbstrac
t: In the first part of the talk\, a brief review of some recent highlight
s of numerical fully nonlinear second order PDEs including Monge-Ampere (M
A) type equations and Hamilton-Jacobi-Bellman (HJB) type equations. Those
numerical methods include finite difference methods\, semi-Lagrangian met
hods\, finite element methods\, discontinuous Galerkin methods. In the sec
ond part of the talk\, describe a recent effort/approach to bridge the gap
between advances on numerical methods for the HJB-type and for the MA-typ
e fully nonlinear PDEs and to use the wealthy numerical techniques for HJB
-type equations to solve MA type equations on general triangular and recta
ngular grids.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160229T143000
DTEND;TZID=America/New_York:20160229T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=30236
SUMMARY:Computational and Applied Mathematics Colloquium - Dynamics of self
-gravitating fluids
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: Dynamics of self-gravitating fluids\nSpeaker: Juhi Jang University of S
outhern California\, University of Southern California\nAbstract: We discu
ss the dynamics of polytropic gaseous stars described by the compressible
Euler-Poisson system. For the static equilibria and for nontrivially accel
erated fluids\, the so-called physical vacuum naturally arises and we are
led to study the vacuum free boundary value problems. We give a brief over
view of the existence and stability theory\, and we present a recent joint
work with Mahir Hadzic on the nonlinear stability of self-similar expandi
ng solutions in the mass-critical regime.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160307T143000
DTEND;TZID=America/New_York:20160307T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=30237
SUMMARY:Computational and Applied Mathematics Colloquium - spring break
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: spring break
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160314T143000
DTEND;TZID=America/New_York:20160314T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=30238
SUMMARY:Computational and Applied Mathematics Colloquium - Recent results i
n the analysis of quantum hydrodynamical models
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: Recent results in the analysis of quantum hydrodynamical models\nSpeake
r: Olivier Pinaud\, Colorado State University\nAbstract: The motivation fo
r this work is to lay the mathematical foundations of a formal theory intr
oduced by P. Degond and C. Ringhofer in 2003 about quantum hydrodynamics.
Their idea is to transpose to the quantum setting Levermore's closure stra
tegy by entropy minimization for the derivation of hydrodynamical models.
We will present two types of results: some concerning the resolution of th
e so-called quantum moment problem\, which is the first brick of the theor
y and a transposition to operators of the classical moment problem for mea
sures\; some other concerning the dynamics of quantum states and their con
vergence to statistical equilibria.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160321T143000
DTEND;TZID=America/New_York:20160321T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=30239
SUMMARY:Computational and Applied Mathematics Colloquium - Accelerating the
simulation of collisional plasma by using deviational particles
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: Accelerating the simulation of collisional plasma by using deviational
particles\nSpeaker: Bokai Yan (Host: Chun)\, UCLA\nAbstract: Long range Co
ulomb collisions between charged particles (electrons and\nions) play a cr
ucial role in nonequilibrium plasma. Particle based\nmethods such as Parti
cle-In-Cell (PIC) methods and DSMC methods are\nwidely used in simulating
these processes. However\, these methods\nbecome highly inefficient as the
system approaches equilibrium\,\nbecause the major cost is spent on simul
ating the meaningless\ncollisions in equilibrium.\nIn this talk I present
a hybrid method for the spatial inhomogeneous\nplasma modeled by Vlasov-Po
isson-Landau system. We evolve the \nequilibrium part by a grid based flui
d solver and the deviation part\nby numerical particles. By using deviatio
nal particles\, which could be\nboth positive and negative\, the particle
number is reduced\nsignificantly in simulating near-equilibrium dynamics.
However the use\nof deviational particles complicates the simulation of bi
nary Coulomb\ncollision. We have developed novel and efficiently algorithm
s to\novercome this difficulty.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160328T143000
DTEND;TZID=America/New_York:20160328T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=30240
SUMMARY:Computational and Applied Mathematics Colloquium - Contraction prop
erties of shocks for conservation laws\, and applications.
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: Contraction properties of shocks for conservation laws\, and applicatio
ns.\nSpeaker: Alexis F. Vasseur\, UT Austin\nAbstract: Shocks are discont
inuous weak solutions of Conservation laws.\nThey describe important physi
cal phenomena as tidal bores (for the shallow\nwater equation)\, or the s
onic boom associated with the passage of a\nsupersonic aircraft (for the c
ompressible Euler equation). We will show\nhow such discontinuities exhibi
t contraction properties\, even for large\nperturbations. Preliminary resu
lts on applications to asymptotic analysis\nwill be presented.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160404T143000
DTEND;TZID=America/New_York:20160404T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=30241
SUMMARY:Computational and Applied Mathematics Colloquium - Quasineutral lim
it in plasmas
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: Quasineutral limit in plasmas\nSpeaker: Frederic Rousset\, Universite P
aris-Sud\, Orsay\nAbstract: We will discuss the quasineutral limit\nfor th
e most simple model for plasmas\, the Vlasov-Poissons system.\nWe will ex
plain the difficulties in the analysis of this singular limit\nand emphasi
ze some similarities with other singular limits in fluid\nmechanics.\nFina
lly we will present some recent results obtained with D. Han-Kwan
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160411T143000
DTEND;TZID=America/New_York:20160411T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=30242
SUMMARY:Computational and Applied Mathematics Colloquium - Long time behavi
or of solutions to the 2D Keller-Segel equation with degenerate diffusion
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: Long time behavior of solutions to the 2D Keller-Segel equation with de
generate diffusion\nSpeaker: Yao Yao\, Georgia Tech\nAbstract: The Keller-
Segel equation is a nonlocal PDE modeling the collective motion of cells a
ttracted by a self-emitted chemical substance. When this equation is set u
p in 2D with a degenerate diffusion term\, it is known that solutions exis
t globally in time\, but their long-time behavior remains unclear. In a jo
int work with J.Carrillo\, S.Hittmeir and B.Volzone\, we prove that all st
ationary solutions must be radially symmetric up to a translation\, and us
e this to show convergence towards the stationary solution as the time goe
s to infinity. I will also discuss another joint work with K.Craig and I.K
im\, where we let the power of degenerate diffusion go to infinity in the
2D Keller-Segel equation\, so it becomes an aggregation equation with a co
nstraint on the maximum density. We will show that if the initial data is
a characteristic function\, the solution will converge to the characterist
ic function of a disk as the time goes to infinity with certain convergenc
e rate.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160418T143000
DTEND;TZID=America/New_York:20160418T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=30243
SUMMARY:Computational and Applied Mathematics Colloquium - Metastability an
d Monte Carlo methods for multiscale problems.
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: Metastability and Monte Carlo methods for multiscale problems.\nSpeaker
: Konstantinos Spiliopoulos\, Boston University\nAbstract: Rare events\, m
etastability and Monte Carlo methods for stochastic dynamical systems have
been of central scientific interest for many years now. In this talk we f
ocus on rough energy landscapes\, that are modeled as multiscale stochasti
c dynamical systems perturbed by small noise. Large deviations deals with
the estimation of rare events. Depending on the type of interaction of the
fast scales with the strength of the noise we get differen t behavior\, b
oth for the large deviations and for the corresponding Monte Carlo methods
.I will describe how to design asymptotically provably efficient importanc
e sampling schemes for the estimation of associated rare event probabiliti
es\, such as exit probabilities\,hitting probabilities\, hitting times\, a
nd expectations of functionals of interest. Standard Monte Carlo methods p
erform poorly in these kind of problems in the small noise limit. In the p
resence of multiple scales one faces additional difficulties and straightf
orward adaptation of importance sampling schemes for standard small noise
diffusions will not produce efficient schemes. We resolve this issue and d
emonstrate the theoretical results by examples and simulation studies.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160422T111000
DTEND;TZID=America/New_York:20160422T120000
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=31713
SUMMARY:Computational and Applied Mathematics Colloquium - Frozen Gaussian
approximation and its applications
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: Frozen Gaussian approximation and its applications\nSpeaker: Xu Yang\,
University of California\, Santa Barbara\nAbstract: We propose the frozen
Gaussian approximation for the computation of high frequency wave propagat
ion. This method approximates the solution to the wave equation by an inte
gral representation. It provides a highly efficient computational tool bas
ed on the asymptotic analysis on phase plane. Compared to geometric optics
\, it provides a valid solution around caustics. Compared to the Gaussian
beam method\, it overcomes the drawback of beam spreading. We will present
numerical examples as well as preliminary application in seismology to sh
ow the performance of this method.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160425T143000
DTEND;TZID=America/New_York:20160425T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=30244
SUMMARY:Computational and Applied Mathematics Colloquium - Energy formulati
ons of continuum magneto-electro-elastics with applications
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: Energy formulations of continuum magneto-electro-elastics with applicat
ions\nSpeaker: Liping Liu\, Rutgers\nAbstract: We present an energy formul
ation of continuum electro-elastic and magneto-electro-elastic materials.
Based on the principle of minimum free energy\, we propose a form of total
free energy of the system in three dimensions\, and then systematically d
erive the theories for a hierarchy of materials including dielectric elast
omers\, piezoelectric ceramics\, ferroelectrics\, flexoelectric materials
\, magnetic elastomers\, magneto-electric materials\, piezo-electric-magne
tic materials among others. The effects of mechanical\, electrical and ma
gnetic boundary devices\, external charges\, polarizations and magnetizati
on are taken into account in formulating the free energy. The linear and
nonlinear boundary value problems governing these materials are explicitly
derived as the Euler-Lagrange equations of the principle of minimum free
energy. Finally\, we illustrate the applications of the formulations by pr
esenting solutions to a few simple problems and give an outlook of potenti
al applications.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20160502T143000
DTEND;TZID=America/New_York:20160502T152000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=31753
SUMMARY:Computational and Applied Mathematics Colloquium - Multiscale Model
ing of the Cell and Beyond
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: Multiscale Modeling of the Cell and Beyond\nSpeaker: Zhangli Peng\, Uni
versity of Notre Dame\nAbstract: Molecular mutations can lead to altered p
hysical properties and malfunction of cells. However\, it is a grand compu
tational challenge to bridge the scales from molecules to cells. In this s
eminar\, I will show examples of applying multiscale modeling to investiga
te biophysical problems from molecular level to cell level\, such as malar
ia\, hereditary blood disorder\, sickle cell disease\, and cancer metastas
is. The findings from these problems have only become possible due to the
multiscale modeling technique and the state-of-the-art understanding of mo
lecular structures\, and promise a new avenue to study the physics of livi
ng systems.
END:VEVENT
END:VCALENDAR