Past IAM-PIMS distinguished colloquium events

Fri, 2017-11-24 16:00 - 17:00
Stephane Popinet
The equations of fluid mechanics can be used to describe natural processes over a wide range of scales, from the behaviour of micro-organisms to astrophysics. Each of these processes is in turn often controlled by internal interactions on widely different scales. Numerical methods able to efficiently resolve these interactions are — in combination with theoretical analysis and lab experiments — an essential tool for advancing our understanding.
Mon, 2017-10-23 15:00 - 16:00
Michael Overton, Courant Institute, NYU
Crouzeix's conjecture is among the most intriguing developments in matrix theory in recent years. Made in 2004 by Michel Crouzeix, it postulates that, for any polynomial p and any matrix A, ||p(A)|| <= 2 max(|p(z)|: z in W(A)), where the norm is the 2-norm and W(A) is the field of values (numerical range) of A, that is the set of points attained by v*Av for some vector v of unit length. Crouzeix proved in 2007 that the inequality above holds if 2 is replaced by 11.08, and very recently this was greatly improved by Palencia, replacing 2 by 1+sqrt(2).
Mon, 2017-09-18 15:00 - 16:00
Thomas Hillen, Mathematics University of Alberta
The human brain has a complex geometric structure consisting of white and gray matter, blood vessels, ventricles, skull etc. It forms a highly anisotropic medium. Glioma in the brain are known to invade along white matter tracks and along other brain structures. Using diffusion tensor imaging (DTI) it is now possible to obtain directional information of the brain geometry. In my talk I will show how this DTI information can be used to parametrize a fully anisotropic diffusion equation for glioma spread.
Mon, 2017-04-03 15:00 - 16:00
Graeme Milton, Utah
We would be hard-pressed to find an area of research that permeates so deeply in nearly all branches of physical sciences and mathematics as does the topic of homogenization. The notion of studying an effective or apparent or overall behaviour of a complex system that behaves differently microscopically occurs recurrently in all branches of science and engineering.
Fri, 2017-03-31 16:00 - 17:00
Mayya Tokman, UCMerced
Computer simulations of the dynamics of complex systems have become an integral tool of science and engineering. Large scale numerical models of systems evolving over a wide range of temporal and spatial scales are routinely encountered in a variety of fields from fluid mechanics and plasma physics to weather prediction and chemical engineering.
Mon, 2017-03-13 15:00 - 16:00
Karen Willcox, MIT
Mon, 2017-02-06 15:00 - 16:00
Mirela Ben-Chen, Technion
Mon, 2017-01-23 15:00 - 16:00
Craig Simmons, Toronto
Stem cell fate is regulated by cues from the cellular microenvironment, including biophysical and biochemical cues presented by the extracellular matrix. Matrix regulation of cell fate has broad implications from disease to regeneration. In this talk, I will discuss our work aimed at determining how biophysical and biochemical cues from the matrix act to drive the fate and function of mesenchymal stem cells.
Mon, 2016-11-28 15:00 - 16:00
Darren Crowdy, Imperial College
Motivated by problems arising in the applied sciences, I will tell the story of what might reasonably be called a "forgotten function". It was discovered in the late 1800s, but has hardly ever been used in the physical sciences even though, as I will show, its applications in science and engineering turn out to be many and varied. In particular, I will survey a new theoretical approach to solving problems in what mathematicians call "multiply connected" domains.
Mon, 2016-02-29 15:00 - 16:00
John Hinch, DAMTP, Cambridge University
The behaviour of elastic liquids does not follow simply from our understanding of both elastic solids and viscous liquids. Four anomalous behaviours will be discussed :-- (i) long wakes at low Reynolds numbers, (ii) large vortices upstream of a constriction, (iii) long times for capillary forces to squeeze a filament, and (iv) different devices measuring wildly different values of `the' extensional viscosity for the international standard liquid M1.
Templates provided by UBC Department of Physics & Astronomy

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