Spring 2020

• • Jan 27 | Arkadz Kirshtein (University of Massachusetts Amherst) | “Modeling and computations of multi-component fluid flow.”
• • Feb 3 |  Chao Chen (UT Austin)  | ” Parallel Hierarchical Solver with Applications to Ice Sheet Modeling.”

• • Feb 10 | Daniel Szyld (Temple) | “One- and Two-level Asynchronous Optimized Schwarz Methods for the solution of PDEs.”      

• • Mar 2 |  Jie Chen (IBM) | “Deep Learning with Graph Structured Data: Methods, Theory, and Applications.”  

• • Mar 9 | Farhad Pourkamali Anaraki (U Mass Lowell) | “Improved Fixed-Rank Nystrom Approximation with Application to Spectral Clustering.”

Fall 2019

• • Sep 23 |  Jan Nordbotten (U. Bergen, Norway) | “Mixed-dimensional Modeling and Simulation.”

• • Sep 30 | Demba Ba (Harvard)| “Deeply-Sparse Signal Representations.”

• • Oct 7 | Michael Mascagni (FSU) | “The White Rat of Numerical Reproducibility.”

• • Oct 21 | Abiy Tasissa (Tufts) | “Reconstructing point sets using low-rank regularization.”

• • Nov 04 | Julio Castrillon (BU) | “Large Scale Kriging: A High Performance Multi-Level Computational Mathematics Approach.”

• • Nov 18 |Bruce Boghosian (Tufts) | “A new pathology in floating-point simulations of chaotic dynamical systems.”

• • Nov 25 | Andrea Arnold (WPI) | “Estimation and Uncertainty Quantification of Time-Varying Parameters via Parameter Tracking.”

• • Dec 02 | Nathaniel Trask (Sandia National Lab) | “Compatible meshfree discretization.

• • Dec 9 | Yanghui Liu (Tufts)| “Anticipative Nonlinear Filtering.”

Spring 2019

• • Feb 4 | Daniel Sussman (BU) | “Multiple Network Inference: From Joint Embeddings to Graph Matching.”

• • Feb 11 | Maurice Fabien (Rice) | “Multigrid techniques for high-order discontinuous Galerkin methods with application to porous media flows.”

• • Mar 4 | Carmen Rodrigo (Zaragoza, Spain) | “Robust multigrid solver for mixed-dimensional models for flow in fractured porous media.”

• • Mar 11 | Zhiping Mao (Brown) | “Efficient and Accurate Single/Multi-domain Spectral Methods for Fractional Diffusion Equations.”

• • Mar 25 | Anna Little |  “Theoretical Guarantees and Exact Cluster Recovery for Classical Multidimensional Scaling.”

• • Apr 3 | Lisa Claus (Wuppertal, Germany) | “Algebraic Multigrid Smoothers for Maxwell’s equations.”

• • Apr 24 | James Brannick (Penn State) | “Algebraic Multigrid: Theory and Practice.”

• • Apr 29| Xu Zhang  (Miss. St.) | “Immersed Finite Element Method for Interface Problems: Basic Idea, Algorithm Development, Error Analysis, and Applications.”

Fall 2018

• • Sep 17 |  Ana Budiša (U. Bergen, Norway) | “Domain decomposition preconditioner for mixed-dimensional flow problems in fractured porous media.”

• • Oct 01 | Tim Atherton (Tufts) | “Morpho—A system for solving shape optimization problems.”

• • Oct 15 | Guosheng Fu (Brown University) | “Explicit divergence-free DG methods for incompressible flow.”

• • Oct 22 | Jeff Hokanson (University of Colorado, Boulder) | “Exploiting Ridge Structure in Chance Constrained Design Under Uncertainty.”

• • Oct 29 | Fleurianne Bertrand (Humboldt University in Berlin) |  “Stress Reconstruction for Elasticity Problems.”

• • Nov 05 | Howard Elman (University of Maryland) | “Collocation Methods for Exploring Perturbations in Linear Stability Analysis.”

• • Nov 19 | James Murphy (Tufts) | “Unsupervised Geometric Learning: Statistical Guarantees and Fast Algorithms.”

• • Nov 26 | Helen Suh   (Tufts – CEE) | “Current Analytical Challenges in Air Pollution Epidemiology.”

• • Dec 03 | Sohom Ray (Tufts – CEE) | “Earthquake Nucleation on Faults: a Finite-Time Instability Problem.”
  • Dec 10 | John Germaine (Tufts – CEE) | “Stress Dependent Mechanical Behavior of Clay Rich Sediments.”

Spring 2018

• • Jan 22 | Everyone (Tufts) | Organizational Meeting.

• • Feb 05 | Richard Hooper (Tufts – CEE) | “The Tyranny of Physics: Are we fooling ourselves in making Earth system predictions?”

• • Feb 12 | Leone Brown (Tufts – Bio) | “Animal migration and disease risk in response to anthropogenic change.”

• • Feb 26 | Elizabeth Crone (Tufts – Bio) | “Mixed use landscapes can facilitate range shifts.”

• • Mar 05 | Hengjie Wang (UC Irvine) |  “An efficient geometric multigrid solver for variable coefficient poisson equation.”

• • Mar 12 | Steven Wise (UT Knoxville) | “Preconditioned descent methods for some nonlinear elliptic equations involving p-Laplacian terms.”

• • Apr 02 | Steffen Muenzenmaier (University Duisburg-Essen) | “An upwinded discontinuous Least-squares finite element method for steady-state transport.”

• • Apr 02 | Hongyan Wang (Tufts) | “The finite-element algorithm for the extended yard-sale model.”

• • Apr 09 | Johannes Kraus (University Duisburg-Essen) | “A posteriori error estimates for a class of nonlinear interface problems in relation to solving the Poisson-Boltzmann equation.”

• Apr 23 | Boris Krämer (MIT) | “Conditional-value-at-risk estimation with reduced-order models.”

Fall 2017

• • Sep 13 | Everyone (Tufts) | Organizational Meeting.

• • Sep 18 | Peter Ohm (Tufts) | “New Stabilized Discretizations for Poroelasticity and the Stokes’ Equations.”

• • Oct 13 | Pasqua D’Ambra (National Research Council of Italy) | “BootCMatch: Bootstrap AMG based on Compatible Weighted Matching.”

• • Oct 20 | Qing Nie (University of California, Irvine) | “Data-driven multiscale modeling of cell fate dynamics.”

• • Oct 25 | Jeff Hokanson (University of Colorado, Boulder) |  “Data-driven polynomial ridge approximation using variable projection.”

• • Oct 30 | David Emerson (StreetContxt) | “A Posteriori Error Estimators for Variational Systems.”

• • Nov 20 | Caleb Magruder (Tufts) | “Adjoint-Based Differentiation for Optimization with Implicit Constraints.”

• Nov 27 | Amanda Howard (Brown University) | “Particle Dispersion in Non-Homogeneous Suspension Flows.”

Spring 2017

• Mar 13 | Francisco Gaspar (Zaragoza) | “Multigrid Waveform Relaxation.   Application to the Time-Fractional Heat Equation.”
• Apr 05 | Peiyao Luo | “Monolithic Multigrid Method for the Coupled Stokes Flow and Deformable Porous Medium System.”

Fall 2016

• • Sep 07 | Everyone (Tufts) | Organizational Meeting

• • Sep 14 | James Adler (Tufts) | “How Not to Give a Talk”

• • Sep 21 | Everyone (Tufts) | 5 Minute Talks

• • Sep 28 | Sergey Voronin (Tufts) | “Efficient methods for the construction of low rank matrix decompositions and applications to inverse problems and parameter estimation.”

• • Oct 19 | Julio Castrillon-Candas |  “Analytic regularity and collocation approximation for elliptic PDEs with random domain deformations.”

• • Oct 26 | Hui Yang (Tufts) | “Mechanics of high-capacity anode materials in lithium-ion nano-batteries.”

• • Nov 2 | Jeffrey Guasto (Tufts) | “Porous media flows: From swimming cells to complex fluids.”

• Nov 9 | Luis Dorfmann (Tufts) | “The elastic secrets of the chameleon tongue.”

Spring 2016

• Jan 27 | Everyone (Tufts) | Organizational Meeting
• Feb 03 | James Adler (Tufts) | Tips for Giving Talks
• Feb 10 | Everyone (Tufts) | 3 Minute Talks
• Feb 16 | Long Chen (UC Irvine) | “Multigrid Methods for Saddle Point Systems of Mixed Finite Element Methods”
• Mar 2 | Peter Love (Tufts) | “A Quantum Algorithm for the Moebius Function”
• Mar 9 | Saheli Sarkar (Northeastern) | “Phenotypic analysis of cancer-immune interactions at single cell level.”
• Mar 16 | Lake Bookman (Yale) | “Approximate Solitons of the Landau-Lifshitz Equation”
• Mar 30 | Grant Garven (Tufts) | “Mathematical Models for Deep Fluid Migration in the Earth’s Crust”
• Apr 06 | Marc Hodes (Tufts) | “Effect of Thermocapillary Stress on Slip Length for a Parallel Ridge-Textured Channel”

Fall 2015

• Sep 09 | Everyone (Tufts) | Organizational Meeting
• Sep 23 | Paul Hand (Rice) | “ShapeFit: Exact location recovery from corrupted pairwise directions.”
• Sep 30 | Elizabeth Wu (Tufts) | “The Investigation of Differential Operator Based on Fast Fourier Continuation and Sobolev Smoothing.”
• Oct 7 | Peter Ohm (Tufts) | “Statistical Thermodynamics and Modeling Chemical Activity Coefficients.”
• Oct 28 | David Emerson (Tufts) | “A Deflation Technique for the Computation of Static Liquid Crystal Configurations.”
• Nov 10 | Charlie Colley (Tufts) | “Data Perturbation Technique for Improving Clustering Objective Functions.”
• Nov 20 | Howard Elman (Maryland) | “Linear Algebra Computations for Parameterized Partial Differential Equations.”
• Dec 02 | Melody Takeuchi (Tufts) | “Abrupt Transitions from Low to High Firing Frequencies in Neuronal Models.”
• Dec 09 | Tim Atherton (Tufts) | “Order, Geometry, and Dynamics in Soft Matter.”

Spring 2015

• Feb 04 | Joanne Lin (Tufts) | “A Contagion Model of Emergency Airplane Evacuations”
• Feb 11 | Thomas Benson (Tufts) | “Introduction to the Cluster”
• Feb 18 | Robert Viesca (Tufts) | “Of Faults and Faucets”
• Feb 25 | Tom Vandervelde and Maggie Stevens (Tufts) | “Studying Anomalous Open-Circuit Voltage Drop-Out in Concentrated Photovotaics Using Computational Numerical Analysis.”
• Mar 25 | Arvind Krishna Saibaba (Tufts) |”Fast Kalman Filter for Random Walk Forecast Model.”
• Apr 01 | Tania Bakhos (Stanford) | “Flexible Krylov Solvers for Shifted Systems with Applications to Solving Large-Scale Inverse Problems.”
• Apr 08 | Xuan Zhao | “An Introduction to Fractional PDEs: Applications and Numerics.”
• Apr 15 | Maria Elenius (Tufts) | “Carbon Dioxide Mineralization in the Presence of Convective Mixing and the Capillary Transition Zone”
• Apr 22 | Jayanth Jagalur-Mohan | “Approximate Optimal Projection for Reduced-Order Models”

Fall 2014

• Sep 11 | James Adler (Tufts) | “Intro to Finite Elements”
• Sep 18 | David Emerson (Tufts) “Intro to Liquid Crystals”
• Sep 25 | Xiaozhe Hu (Tufts) | “Intro to Geometric Multigrid”
• Oct 02 | Bruce Boghosian (Tufts) | “Intro to Lattice Boltzman”
• Oct 09 | Ilya Lashuk (Tufts) | “Intro to Algebraic Multigrid/Smoothed Aggregation”
• Oct 16 | James Adler (Tufts) | “Discussion of Finite Elements for Dissipative Maxwell’s Equations.”
• Oct 23 | David Emerson (Tufts) | “Intro to Trust Region Optimization.”
• Oct 30 | Xiaozhe Hu and Tom Benson (Tufts) | “MHD Formulations.”
• Nov 06 | James, Xiaozhe, and Tom (Tufts) | “Solvers for Maxwell’s Equations and MHD.”
• Nov 13 | Scott MacLachlan (Memorial University) | “First-Order System Petrov-Galerkin for Singularly Perturbed Problems.”
• Nov 20 | Bruce Boghosian (Tufts) | “More on Lattice Boltzman for Fluids.”
• Dec 04 | Dong Han (Tufts) | “Intro to Magnetoelasticity”