Mathematical Biology Seminar - Sara Calandrini

Sept. 25, 2018

An ALE method for large structural displacements in fluid-structure interaction simulations of venous valves Veins are blood vessels subjected to very low blood pressures, and they rely on muscle contractions and one-way valves to push blood back to the heart. The main contribution of venous valves is to prevent back...

Stats, Optimization, and Machine Learning Seminar - Emilliano Dall'anese

Sept. 25, 2018

Online Optimization with Feedback The talk focuses on the design and analysis of running (i.e., online) algorithmic solutions to control systems or networked systems based on performance objectives and engineering constraints that may evolve over time. The time-varying convex optimization formalism is leveraged to model optimal operational trajectories of the...

Nonlinear Waves Seminar - Ezio Iacocca

Sept. 25, 2018

Rapid soliton nucleation and dynamics in magnetic materials Magnetism in solid materials is a fascinating yet complex phenomenon that encompasses vastly different length and time scales. This complexity is typically resolved by establishing equations that are valid at different scales. For example, magnetic dynamics at the atomic level can be...

APPM Colloquium - Yingda Cheng

Sept. 21, 2018

Sparse Grid Discontinuous Galerkin Methods for High-Dimensional Transport Equations In this talk, we present sparse grid discontinuous Galerkin (DG) schemes for solving high-dimensional PDEs. We will discuss the construction of the scheme based on sparse finite element spaces built from multiwavelets, its properties and applications in kinetic transport equations, such...

Stochastics Seminar - Matteo Basei

Sept. 20, 2018

Nonzero-sum stochastic differential games with impulse controls We consider a general class of nonzero-sum impulsive games with N players. By means of a suitable system of quasi-variational inequalities, we provide a verification theorem for the equilibrium strategies and the value functions of the game. In particular, we focus on the...

Complex/Dynamical Systems Seminar - Orit Peleg

Sept. 20, 2018

Collective Ecophysiology and Physics of Social Insects Collective behavior of organisms creates environmental micro-niches that buffer them from environmental fluctuations e.g. temperature, humidity, mechanical perturbations etc., thus coupling organismal physiology, environmental physics and population ecology. This talk will focus on a combination of biological experiments, theory and computation to understand...

APPM Colloquium - Paul Sava

Sept. 18, 2018

3D radar wavefield imaging of comet interiors The Rosetta mission to comet 67P/C-G revolutionized comet science, but left major questions on the table. Are cometary nuclei primordial or are they collisionally-evolved as predicted by modern theories of planet formation? The CONSERT radar experiment sounded the interior of the nucleus showing...

Nonlinear Waves Seminar - Amir Sagiv

Sept. 18, 2018

Prediction of random and chaotic dynamics in nonlinear optics The control and prediction of interactions between high-power, nonlinear laser beams is a longstanding open problem in optics and mathematics. One of the traditional underlying assumptions in this field has been that these dynamics are governed by a deterministic model. Lately,...

Complex/Dynamical Systems Seminar - Bob Easton

Sept. 13, 2018

Spacecraft Mission Design Mission design combines dynamics, control theory, and computation. Newton’s laws and computational tools are used to design spacecraft orbits to explore our solar system. Onboard controls are used to change the velocity and orientation of a spacecraft. When Newton’s equations of motion are formulated as a Hamiltonian...

Mathematical Biology Seminar - Harry Dudley

Sept. 11, 2018

Using Oriented Matroids To Understand Metabolic Networks Genome scale models of cellular metabolism involve thousands of reactions, even for relatively simple model organisms such as E. coli . Given a stoichiometric matrix, S, one could parametrize a system of thousands of ODEs for the metabolite concentrations: x' = S*v(x;k). Instead,...

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