Seminars

AWM Special Seminar - Kristin Lauter

Feb. 12, 2019

Private AI (or: How to Keep Your Location Data Secret) As the world rushes towards the adoption of Artificial Intelligence (AI) in all aspects of our lives, the promise is great, but the risks are many. AI can help to improve and simplify our daily lives and introduce new types...

Geophysical/Astrophysical Fluid Dynamics Seminar - Bradley W Hindman

Feb. 12, 2019

Stars are filled with sound. Turbulent convection within a star makes a broadband hum, but certain frequencies get amplified because they are resonant. For example, the Sun’s surface throbs and rings under the combined influence of several million resonant acoustic modes. Thus, stars act like really bad-sounding musical instruments. Helioseismology...

Department Colloquium - Sebastian Skardal

Feb. 8, 2019

Practical and Theoretical Questions in Network Synchronization: Optimization and Control Collective behavior in large ensembles of network-coupled dynamical systems remains an active area of research in the nonlinear dynamics and networks science communities. Example applications stem from both naturally-occurring to man-made systems, e.g., cardiac pacemaker cells, mammalian circadian rhythms, Josephson...

Complex/Dynamical Systems Seminar: Saverio Spagnolie

Feb. 7, 2019

Suspensions of active particles in fluids exhibit incredibly rich behavior, from organization on length scales much longer than the individual particle size to mixing flows and negative viscosities. We will discuss the dynamics of hydrodynamically interacting motile and non-motile stress-generating swimmers or particles as they invade a surrounding viscous fluid,...

Stats, Optimization, and Machine Learning Seminar - Osman Malik and Ann-Casey Hughes

Feb. 5, 2019

Osman Malik - Fast Randomized Matrix and Tensor Interpolative Decomposition Using CountSketch In this talk I will present our recently developed fast randomized algorithm for matrix interpolative decomposition. If time permits, I will also say a few words about how our method can be applied to the tensor interpolative decomposition...

Department Colloquium - Emiliano Dall'anese

Feb. 1, 2019

Feedback-based online algorithms for time-varying network optimization The talk focuses on the synthesis and analysis of online algorithmic solutions to control networked systems based on performance objectives and engineering constraints that may evolve over time. The time-varying optimization formalism is leveraged to model optimal trajectories of the networked systems, as...

Nonlinear Waves Seminar - Michelle Maiden

Jan. 29, 2019

Soliton fission from a large disturbance in the viscous fluid conduit system The resolution of a large, localized initial disturbance is considered in the context of the viscous fluid conduit system--the driven, cylindrical, free interface between two miscible Stokes fluids with high viscosity contrast. Due to buoyancy induced nonlinear self-steepening...

Department Colloquium - Dan Zhang

Jan. 25, 2019

Finite-Horizon Approximate Linear Programs for an Infinite-Horizon Revenue Management Problem Approximate linear programs have been used extensively to approximately solve stochastic dynamic programs that suffer from the well-known curse of dimensionality. Due to canonical results establishing the optimality of stationary value functions and policies for infinite-horizon dynamic programs, the literature...

Nonlinear Waves Seminar - Mark Siemens

Jan. 22, 2019

Quantum Turbulent Structure in Light The infinite superpositions of random plane waves are known to be threaded with vortex line singularities which form complicated tangles and obey strict topological rules. We observe that within these structures a timelike axis appears to emerge with which we can define vortex velocities in...

APPM+CS Postdoc Seminar: Olena Burkovska

Jan. 18, 2019

Title: " Approximation of parametrized kernels arising in nonlocal and fractional Laplace models" Abstract: We consider parametrized linear and obstacle problems driven by a spatially nonlocal integral operator. These problems have a broad impact on current developments in different fields such as, e.g., peridynamics, contact mechanics, and finance. We focus...

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