Past Events
Scientific, Seminar
DG-MP-PDE Seminar: Traffic flow and traffic jams: from kinetic theory to functional differential equations
November 12, 2009
University of British Columbia
I will speak on certain kinetic and macroscopic models of traffic flow. After a review of the concept of a fundamental diagram the high-density regime will be considered, and the emergence of macroscopic models with nolocalities will be discussed...
Industrial, Lunchbox Lecture
Applying the phase congruency algorithm to seismic data slices
November 12, 2009
University of Calgary
A common problem in seismic interpretation is the search for discontinuities such as faults. The usual approach to identifying these features is the coherency method (Bahorich and Farmer, 1995). The phase congruency algorithm detects corners and...
Scientific, Seminar
Math Biology Seminar: A Numerical Model of Cellular Blebbing
November 10, 2009
University of British Columbia
In animal cells, a "bleb" is a balloon-like protrusion of the plasma membrane that forms when the membrane separates from the underlying cytoskeletal network and is pushed outward by pressure-driven cytosol. The protrusion later retracts due to the...
Scientific, Seminar
DG-MP-PDE Seminar: Fourth order diffusion with geometric link to second order diffusion
November 10, 2009
University of British Columbia
We describe a fourth order family generalizing the linear-mobility thin film equation on R^n. In joint work with R. McCann we derive formally sharp converence rates to self-similarity, using a link to Denzler-McCann's analysis of a second order...
Scientific, Seminar
SCAIM Seminar: Advanced Higher Order Finite Elements - From Theory to Application with Netgen/NGSolve
November 10, 2009
University of British Columbia
In this talk the Meshing program Netgen and the Finite Element library NGSolve are introduced. The possibilities of this software package will be highlighted with the help of two modern examples for Advanced Higher Order Finite Element Methods: A...
Scientific, Seminar
IAM-PIMS-MITACS Distinguished Colloquium -Theory and Modeling of Reactive Events
November 9, 2009
University of British Columbia
In the first part of the talk, I will explain why we may need to go beyond the standard framework of transition state theory (TST) to describe activated processes and reactive events, and I will present another framework, termed transition path...
Scientific, Seminar
Algebraic Geometry Seminar: Arc spaces and equivariant cohomology
November 9, 2009
University of British Columbia
In the first of a two lecture series (to be completed by Dave Anderson immediately following), we present a new geometric interpretation of equivariant cohomology in which one replaces a smooth, complex $G$-variety $X$ by its associated arc space $J_...
Scientific, Seminar
Algebraic Geometry Seminar: Arc spaces and equivariant cohomology II
November 9, 2009
University of British Columbia
Let G be an algebraic group acting on a smooth complex variety X. In joint work with Alan Stapledon, we present a new perspective on the G-equivariant cohomology of X, which replaces the action of G on X with the induced action of the respective arc...
Scientific, Seminar
PIMS/Math Colloquium: Issues in multivariate polynomial interpolation
November 6, 2009
University of British Columbia
While univariate polynomial interpolation has been a basic tool of scientific computing for hundreds of years, multivariate polynomial interpolation is much less understood. Already the question from which polynomial space to choose an interpolant to...
Scientific, Seminar
Algebra Topology Seminar: Nullity classes and t-structures in the derived category of a ring
November 4, 2009
University of British Columbia
In stable homotopy theory the thick subcategory theorem of Hopkins and Smith classifies thick subcategories of the triangulated category of p-torsion finite spectra. Unstably Bousfield classified nullity classes of p-torsion finite suspensions. We...