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:20140825T143000
DTEND;TZID=America/New_York:20140825T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=22709
SUMMARY:Computational and Applied Mathematics Colloquium - Transport of Cha
rged Particles in Physical and Biological Environments: An Energetic Varia
tional Approach
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: Transport of Charged Particles in Physical and Biological Environments:
An Energetic Variational Approach\nSpeaker: Chun Liu\, Penn State Univers
ity\nAbstract: I will present a thermodynamics-consistent framework for st
udying the transport of charged particles in various environments. We will
explore various physical and mathematical descriptions for 1) the free en
ergy corresponding to the local and nonlocal interactions between particle
s as well as 2) dissipation mechanisms. For this talk\, I will just focus
on various classical and popular general diffusion problems\, such as frac
tional Laplacian\, porous media\, nonlocal diffusion as well as various st
ochastic interpretations.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140901T143000
DTEND;TZID=America/New_York:20140901T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=22710
SUMMARY:Computational and Applied Mathematics Colloquium - Labor Day\, no c
lasses
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: Labor Day\, no classes\nSpeaker: Labor Day\, no classes
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140908T143000
DTEND;TZID=America/New_York:20140908T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=22711
SUMMARY:Computational and Applied Mathematics Colloquium - Evolution of soc
ial instincts in within- and between-group conflicts
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: Evolution of social instincts in within- and between-group conflicts\n
Speaker: Sergey Gavrilets\, University of Tennessee (Host: A Belmonte)\nAb
stract: I model the effects of within-group inequality on the evolution of
social\ninstincts\, i.e. genetically-based propensities and biases that a
ffect the\nbehavior of individuals in social interactions. First\, I consi
der competitive\nwithin-group interactions. I identify a novel mechanism f
or the\nevolutionary emergence of the "egalitarian syndrome" and leveling
\ncoalitions in which one helps the weak against the strong bully. Second
\,\nI study a collective action problem in between-group conflicts and sho
w\nhow bullies can dialectically become "altruists". The mechanisms I desc
ribe\ndo not require genetic relatedness\, reciprocity\, reputation\, or p
unishment.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140915T143000
DTEND;TZID=America/New_York:20140915T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=22712
SUMMARY:Computational and Applied Mathematics Colloquium - Traveling waves
in lattices of oscillators
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: Traveling waves in lattices of oscillators\nSpeaker: Mark Levi\, Penn S
tate University
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140922T143000
DTEND;TZID=America/New_York:20140922T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=22713
SUMMARY:Computational and Applied Mathematics Colloquium - Applications and
Discretizations for the Poisson-Nernst-Planck System
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: Applications and Discretizations for the Poisson-Nernst-Planck System\n
Speaker: Maximilian Metti\, Penn State University\nAbstract: Many devices
involving charged particles or electric current can be modeled using the P
oisson-Nernst-Planck (PNP) equations. We investigate this system of equati
ons along with some standard modifications found in applications to engine
ering and biological contexts. Further consideration is given to discrete
formulations of the PNP system and a numerical approach for computing a so
lution.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140929T143000
DTEND;TZID=America/New_York:20140929T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=22714
SUMMARY:Computational and Applied Mathematics Colloquium - Blended Atomisti
c/Continuum Hybrid Methods for crystalline materials
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: Blended Atomistic/Continuum Hybrid Methods for crystalline materials\nS
peaker: Xingjie Li\, Brown University (C Liu/X Li)\nAbstract: We consider
two prototypical atomistic-to-continuum coupling methods of blending type:
the energy-based and the force-based quasicontinuum methods\, with a comp
rehensive error analysis that is valid in two and three dimensions\, for f
inite many-body interactions (e.g.\, EAM type)\, and in the presence of la
ttice defects (point defects and dislocations). Based on a precise choice
of blending mechanism\, the error estimates are considered in terms of deg
rees of freedom. The numerical experiments confirm the theoretical predict
ions\, and demonstrate a superior accuracy of the force-based blending ove
r energy-based blending schemes.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20141006T143000
DTEND;TZID=America/New_York:20141006T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=22715
SUMMARY:Computational and Applied Mathematics Colloquium - Extracting and p
redicting spatiotemporal patterns from data with dynamics-adapted kernels
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: Extracting and predicting spatiotemporal patterns from data with dynami
cs-adapted kernels\nSpeaker: Dimitrios Giannakis\, New York University (Ho
st: J Harlim)\nAbstract: Kernel methods provide an attractive way of extra
cting features from data by biasing their geometry in a controlled manner.
In this talk\, we discuss a family of kernels for dynamical systems featu
ring an explicit dependence on the dynamical vector field operating in the
phase-space manifold\, estimated empirically through finite differences o
f time-ordered data samples. The associated diffusion operator for data an
alysis is adapted to the dynamics in that it generates diffusions along th
e integral curves of the dynamical vector field. We present applications t
o toy dynamical systems and comprehensive climate models. We also discuss
a technique for analog forecasting based on these kernels. In this empiric
al forecasting technique\, kernels are used to create weighted ensembles o
f states (analogs) with high similarity to the initial data from a record
of historical observations\, and the future values of observables are pred
icted from the historical evolution of the ensemble.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20141010T140000
DTEND;TZID=America/New_York:20141010T142500
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=25627
SUMMARY:Computational and Applied Mathematics Colloquium - Coffee Break
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: Coffee Break\nAbstract Link: http://
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20141010T143000
DTEND;TZID=America/New_York:20141010T153000
LOCATION:MB114
URL:http://www.math.psu.edu/seminars/meeting.php?id=24477
SUMMARY:Computational and Applied Mathematics Colloquium - How do dispersed
inertial particles modify turbulent flows ?
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: How do dispersed inertial particles modify turbulent flows ?\nSpeaker:
Said Elghobashi\, University of California\, Irvine (Host: J Xu)\nAbstract
: Turbulent flows laden with inertial particles are ubiquitous in nature (
e.g. aerosols in clouds\, and dust storms on Earth and Mars) and in indust
rial applications (e.g. liquid fuel and pulverized coal sprays in combusti
on chambers). Experimental and numerical studies of these flows are quite
challenging due to the wide spectra of length- and time- scales of the\ndi
spersed particles in addition to the spectra of scales intrinsic to the ca
rrier fluid turbulence.\n\nThe two-way and and four-way nonlinear interact
ions between the dispersed particles and the turbulence result in complex
multi-scale physical phenomena. The lecture focuses on the physical mechan
isms of interactions between dispersed spherical particles and isotropic t
urbulence using Direct Numerical Simulation (DNS). Particles whose diamete
r is smaller than the Kolmogorov length scale are simulated as point parti
cles. Larger particles with\ndiameter of the order of Taylor microscale ar
e fully resolved using the Immersed Boundary method.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20141013T143000
DTEND;TZID=America/New_York:20141013T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=22716
SUMMARY:Computational and Applied Mathematics Colloquium - Boltzmann and Fo
kker-Planck Equations for Economic Modeling
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: Boltzmann and Fokker-Planck Equations for Economic Modeling\nSpeaker: B
ruce Boghosian\, Tufts University (C Liu)\nAbstract: The Boltzmann equatio
n provides a continuum description of a population of particles undergoing
pairwise interactions in which they can exchange momentum and energy. An
economy consists of economic agents who engage in pairwise transactions i
n which they can exchange wealth. It has long been suggested that it ough
t to be possible to write a Boltzmann equation that describes an economy.
This work describes how to do exactly that for a simplified microeconomic
model\, called the "Yard-Sale Model." We also show how\, in the limit of
small transactions\, this Boltzmann equation reduces to a nonlinear Fokke
r-Planck equation for the probability distribution function of wealth.\n\n
Stability of a market economy is one of the fundamental tenets of classica
l and neoclassical economics\, dating back at least to Adam Smith's "invis
ible hand" concept. In spite of that\, we find that our model market econ
omy is highly unstable\, with a strong tendency toward oligarchy. Mathema
tically\, its time-asymptotic state is a singular distribution. It can be
stabilized by adding some mechanism for wealth redistribution\, such as a
wealth tax\, in which case its steady state is shown to be similar to the
the famous Pareto distribution\, with a cutoff at very low values of weal
th and power-law decay at very high values. Indeed\, this appears to be t
he first detailed microeconomic explanation of Pareto's century-old law of
wealth distribution\, a key observation of macroeconomics.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20141020T143000
DTEND;TZID=America/New_York:20141020T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=25479
SUMMARY:Computational and Applied Mathematics Colloquium - The Phase Field
Crystal Model: A Continuum Framework for Studying Phase Transformations on
Atomic Length and Diffusive Time Scales
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: The Phase Field Crystal Model: A Continuum Framework for Studying Phase
Transformations on Atomic Length and Diffusive Time Scales\nSpeaker: Stev
en Wise\, University of Tennessee (Host: M Metti)\nAbstract: Crystalline m
aterials contain atomic-scale imperfections in the form of defects – suc
h as vacancies\, grain boundaries\, and dislocations – and controlling\,
or at least predicting\, the formation and evolution of such imperfection
s during phase transformation is a major challenge. The phase field cryst
al (PFC) methodology has emerged as a important\, increasingly-preferred m
odeling framework for studying materials with atomic-scale structures on d
iffusive time scales. In contrast to molecular dynamics models\, the fast
atomic vibrational time-scale phenomena are averaged out\, in essence\, bu
t the atomic spatial resolution is preserved. In this talk\, I will descr
ibe some analysis (existence and uniqueness)\, approximation\, and fast co
mputation of solutions to PFC and PFC-type equations\, a family of highly
nonlinear hyperbolic-parabolic PDE and integro-PDE. I will also discuss a
new PFC framework for multi-spatial-scale modeling based on the recent met
hod of amplitude expansions. This presentation will be accessible to grad
uate students.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20141027T143000
DTEND;TZID=America/New_York:20141027T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=22718
SUMMARY:Computational and Applied Mathematics Colloquium - Discretization o
f time-dependent quantum systems: propagation of the evolution operator
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: Discretization of time-dependent quantum systems: propagation of the ev
olution operator\nSpeaker: Joseph Jerome\, Northwestern University\nAbstra
ct: The talk represents joint work with Eric Polizzi and is based on a pap
er of similar title recently published online in Applicable Analysis. We d
iscuss time-dependent quantum systems on bounded domains\; these represent
closed systems and are relevant for application to Carbon Nanotubes and m
olecules. Included in our framework are linear iterations involved in time
-dependent density functional theory as well as the global nonlinear model
which includes the Hartree potential. A key aspect of the analysis of the
algorithms is the use of time-ordered evolution operators\, which allow f
or both a well-posed problem and its approximation. The approximation theo
rems we obtain are operator extensions of classical quadrature theorems. T
he global existence theorem uses the Leray-Schauder fixed point theorem\,
coupled to a modified conservation of energy principle. The simulations we
re performed by Eric Polizzi using his algorithm FEAST. The evolution oper
ators used in the talk are due to T. Kato and their properties will be sum
marized. Application areas make significant use of these operators\, parti
cularly chemical physics. In the mathematical literature\, the Euclidean s
pace problem has been studied by T. Cazenave and others\, employing the St
richartz inequalities. These are ultimately based on semi-groups. Our resu
lts appear to be complementary to results of this type. The solutions we d
iscuss are strong solutions. We are currently studying more general potent
ials via weak solutions. This work is in-progress.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20141103T143000
DTEND;TZID=America/New_York:20141103T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=22719
SUMMARY:Computational and Applied Mathematics Colloquium - TBA
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: TBA\nSpeaker: Feng Liu\, University of California\, Irvine (Host: J Xu)
\nAbstract Link: http://fliu.eng.uci.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20141110T143000
DTEND;TZID=America/New_York:20141110T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=22720
SUMMARY:Computational and Applied Mathematics Colloquium - TBA
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: TBA\nSpeaker: John Shadid\, Sandia National Laboratory (Host: J Xu)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20141117T143000
DTEND;TZID=America/New_York:20141117T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=22691
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:20141124T143000
DTEND;TZID=America/New_York:20141124T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=22721
SUMMARY:Computational and Applied Mathematics Colloquium - Fall Break\, No
Seminar
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: Fall Break\, No Seminar\nSpeaker: Fall Break\, No Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20141201T143000
DTEND;TZID=America/New_York:20141201T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=22722
SUMMARY:Computational and Applied Mathematics Colloquium - TBA
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: TBA\nSpeaker: Elaine Spiller\, Marquette University (Host: J Conway)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20141208T143000
DTEND;TZID=America/New_York:20141208T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=22723
SUMMARY:Computational and Applied Mathematics Colloquium - TBA
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: TBA\nSpeaker: Anna Vainchtein\, University of Pittsburgh (Host: X Li)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20141215T143000
DTEND;TZID=America/New_York:20141215T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=22724
SUMMARY:Computational and Applied Mathematics Colloquium - TBA
DESCRIPTION:Seminar: Computational and Applied Mathematics Colloquium\nTitl
e: TBA\nAbstract Link: http://
END:VEVENT
END:VCALENDAR