2015

1. 2015 IEEE International Conference on Parallel and Distributed Computing, Melbourne (ICPADS 2015), December 2015. 'Algorithmic Acceleration of Parallel ALS for Collaborative Filtering: Speeding up Distributed Big Data Recommendation in Spark'. [pdf]
2. Mathematics Colloquium, McMaster University, April 2015.
   'High-Order Adaptive Simulation Methods for Compressible Fluid Flows with Applications in Space Physics'. [pdf]
3. 17th Copper Mountain Conference on Multigrid Methods, March 2015.
   'Fast Multilevel Co-Clustering: Unraveling the Multilevel Overlapping Cluster Structure of Social Network Data'. [pdf]
4. Waterloo Institute for Complexity and Innovation (WICI) seminar, January 2015.
   'Mathematical modelling of social spreading processes'. [pdf]

2014

1. European Multigrid Conference, Leuven, September 2014.
   'Adaptive Algebraic Multigrid for Singular Value and Tensor Decompositions'. Invited plenary lecture. [pdf]
2. Faculty of Information Technology Colloquium/MAXIMA Seminar, Monash University, July 2014.
   'Multilevel Aggregation of Graphs: from Biomedical Image Segmentation to Community Finding in Social Networks'.
3. Applied and Compuational Mathematics Seminar, School of Mathematical Sciences, Monash University, June 2014.
   'Finite Volume Element Methods for Nonlinear Elliptic PDEs Describing Singular Capillary Surfaces'. [pdf]
4. MAXIMA Seminar, School of Mathematical Sciences, Monash University, June 2014.
   'Fast numerical methods for canonical tensor decomposition'. [pdf]
5. Monash Probability & Statistics Seminar, School of Mathematical Sciences, Monash University, June 2014.
   'Fast multilevel numerical methods for Markov chains'. [pdf]
6. Department of Mathematics Colloquium, Hong Kong Baptist University, May 2014.
   'Speeding Up ALS for Canonical Tensor Decomposition using Nonlinear Krylov Methods and Multigrid'. [pdf]
7. 16th SIAM Conference on Parallel Processing for Scientific Computing, February 2014, 'Parallel Algorithms for MapReduce-Based Scientific Computing: A Second Introduction'. [pdf]

2013

1. AMMCS-2013 International Interdisciplinary Conference on Applied Mathematics, Modeling and Computational Science, Waterloo, 2013.
   'High-Order Finite Volume Element Methods for Elliptic PDEs with Singularities, and Applications to Capillarity'. [pdf]
2. AMMCS-2013 International Interdisciplinary Conference on Applied Mathematics, Modeling and Computational Science, Waterloo, 2013.
   'Cluster Newton Method for Sampling Multiple Solutions of an Underdetermined Inverse Problem: Parameter Identification for Pharmacokinetics'. [pdf]
3. Fields Workshop on Numerical Methods for Fluid Dynamics, Carleton University, Ottawa, August 2013.
   'Numerical Magnetohydrodynamics with Application to Space Physics Flows: Structure of MHD as a Hyperbolic System', invited mini-course (lecture 1). [pdf]
4. Fields Workshop on Numerical Methods for Fluid Dynamics, Carleton University, Ottawa, August 2013.
   'Numerical Magnetohydrodynamics with Application to Space Physics Flows: Finite Volume Methods for MHD', invited mini-course (lecture 2). [pdf]
5. Fields Workshop on Numerical Methods for Fluid Dynamics, Carleton University, Ottawa, August 2013.
   'Numerical Magnetohydrodynamics with Application to Space Physics Flows: Numerical Methods for Transonic Solutions', invited mini-course (lecture 3). [pdf]
6. First Canadian Symposium on Numerical Analysis and Scientific Computing, Quebec City, June 2013.
   'Extending Preconditioned GMRES to Nonlinear Optimization'. [pdf]
7. Weizmann Workshop 2013 on Multilevel Computational Methods and Optimization, Rehovot, Israel, May 2013.
   'Adaptive Algebraic Multigrid for Canonical Tensor Decomposition'. [pdf]
8. 16th Copper Mountain Conference on Multigrid Methods, March 2013.
   'Adaptive Algebraic Multigrid for Singular Value Decomposition'. [pdf]
9. SIAM Conference on Computational Science and Engineering, Boston, February 2013.
   'A Parallel and Dynamically Adaptive 3D Cubed-Sphere Grid Framework for Hyperbolic Conservation Laws'. [pdf]
10. ORCA seminar, University of Guelph, February 2013.
    'The Arab Spring: A simple compartmental model for the dynamics of a revolution'. [pdf]

2012

1. SIAM Conference on Applied Linear Algebra, Valencia, Spain, June 2012.
   'Extending Preconditioned GMRES to Nonlinear Optimization'. Invited plenary lecture. [pdf]
2. 20th Canadian Symposium on Fluid Dynamics, Toronto, June 2012.
   'Hyperbolic Conservation Laws on 3D Cubed-Sphere Grids: A Parallel High-Order Solution-Adaptive Simulation Framework'. [pdf]
3. Canadian Applied and Industrial Mathematics Society (CAIMS) Annual Meeting, June 2012.
   'Global approximation of singular capillary surfaces: asymptotic analysis meets numerical analysis'. [pdf]
4. 12th Copper Mountain Conference on Iterative Methods, March 2012.
   'Extending GMRES to Nonlinear Optimization, with Application to Tensor Optimization'. [pdf]

2011

1. Scientific Computing seminar, University of Ontario Institute of Technology, 27 September 2011.
   'Extending GMRES to Nonlinear Optimization: Application to Tensor Approximation'. [pdf]
2. Max Planck Institute for Informatics seminar, Saarbruecken, Germany, 16 August 2011.
   'A residual-minimizing nonlinear optimization method applied to tensor approximation'. [pdf]
3. Workshop on Tensor Approximation in High Dimension, Bonn, Germany, 2 August 2011.
   'Extending GMRES to Nonlinear Optimization: Application to Tensor Approximation'. [pdf]
4. Department of Computer Science seminar, Friedrich-Alexander-Universitaet Erlangen-Nuernberg, Germany, 7 July 2011.
   'Extending GMRES to Nonlinear Optimization: Application to Tensor Approximation'. [pdf]
5. Department of Mathematics seminar, University of Trier, Germany, 5 July 2011.
   'Extending GMRES to Nonlinear Optimization: Application to Tensor Approximation'. [pdf]
6. Mathematics Division seminar, Center for Computational Engineering Science, RWTH Aachen University, Germany, 29 June 2011.
   'Efficient solution of stationary Euler flows with critical points and shocks'. [pdf]
7. Applied Computer Science Group seminar, Department of Mathematics, University of Wuppertal, Germany, May 2011.
   'Algebraic Multigrid for the Singular Value Problem'. [pdf]
8. 2011 SIAM Conference on Computational Science and Engineering Reno, NV, USA, March 1, 2011.
   'Multilevel Aggregation of Small-World Graphs with Application to Random-Walk Ranking'. [pdf]
9. Center for Applied Scientific Computing Seminar. Lawrence Livermore National Laboratory, California, February 2011.
   'Algebraic Multigrid for the Singular Value Problem'. [pdf]

2010

1. National Institute of Informatics seminar, Tokyo, Japan, December 8, 2010.
   'Multigrid methods for Markov Chains'. [pdf]
2. National Institute of Informatics seminar, Tokyo, Japan, December 8, 2010.
   '3D Multilevel Aggregation for Segmentation and Tracking of Live Cells'. [pdf]
3. National Institute of Informatics seminar, Tokyo, Japan, December 10, 2010.
   'Distributed transactions in Hadoop's HBase and Google's Bigtable'. [pdf]
4. Institute for Aerospace Studies seminar, University of Toronto, November 23, 2010.
   'Efficient solution of stationary Euler flows with critical points and shocks'. [pdf]
5. Tenth European MultiGrid Conference, Ischia, Italy, September 19 - 23, 2010.
   '3D Multilevel Aggregation for Segmentation and Tracking of Live Cells'.
6. 2010 Canadian Association of Physicists Congress, Division of Atmospheric and Space Physics, University of Toronto, June 7-11, 2010.
   'Numerical Modelling of MHD Space Plasmas', invited lecture. [pdf]
7. Oberseminar Mathematische Bildanalyse, Mathematical Image Analysis Group, Saarland University, Germany, May 21, 2010.
   '3D Multilevel Aggregation for Segmentation and Tracking of Live Cells'. [pdf]
8. Eleventh Copper Mountain Conference on Iterative Methods, April 2010.
   'Recursively Accelerated Multilevel Aggregation for Markov Chains'. [pdf]
9. Eleventh Copper Mountain Conference on Iterative Methods, April 2010.
   'Multilevel Space-Time Aggregation for Cell Microscopy Segmentation and Tracking'. [pdf]

2009

1. Department of Applied Mathematics Colloquium, University of Waterloo, 5 November 2009.
   'Numerical methods for nonlinear ODE and PDE systems that describe stationary transonic fluid flow'. [pdf]
2. 12th Seminar "NUMDIFF" on Numerical Solution of Differential and Differential-Algebraic Equations, September 14-18, 2009, Martin-Luther-University Halle-Wittenberg (Germany), invited plenary lecture.
   'Efficient numerical simulation of stationary Euler fluid flows with critical points and shocks'. [pdf]
3. 14th International Conference on Random Structures and Algorithms, August 3-7, 2009, Poznan (Poland).
   'Fast Multilevel Numerical Methods for Random Walks on Directed Graphs'. [pdf]
4. Workshop on Computational Methods for Hyperbolic Problems, April 20-22, 2009, Waterloo, invited.
   'Efficient solution of stationary Euler flows with critical points and shocks'. [pdf]
5. SIAM Conference on Computational Science and Engineering, March 2-6, 2009, Miami, invited (mini-symposium).
   'Smoothed Aggregation and Algebraic Multigrid Methods for Markov Chains'. [pdf]
6. Division of Atmospheric and Space Physics (DASP) Workshop, February 20-21, 2009, Banff.
   'Secondary Slow Shock Front in the Magnetosheath for Strongly Magnetized Solar Wind Conditions'. [pdf]

2008

1. 5th Canadian Solar Workshop, November 5-7, 2008, Canadian Space Agency, Montreal.
   'Introduction to numerical MHD modeling of the solar wind'. [pdf]
2. Ninth European MultiGrid Conference, October 20 - 24, 2008, Bad Herrenalb, Germany.
   'Smoothed Aggregation Multigrid for Slowly Mixing Markov Chains'. [pdf]
3. Departamento de Ingenieria Matematica Seminar, Universidad de Chile, 25 April 2008.
   'Fast Iterative Solvers for Markov Chains, with Application to Google's PageRank'. [pdf]
4. Tenth Copper Mountain Conference on Iterative Methods, April 2008.
   'Smoothed Aggregation Multigrid for Slowly Mixing Markov Chains'. [pdf]
5. Department of Applied Mathematics Computational Mathematics Seminar, University of Colorado at Boulder, March 4, 2008.
   'Smoothed Aggregation Multigrid for Slowly Mixing Markov Chains'. [pdf]
6. Waterloo Numerical Analysis Symposium in commemoration of Gene Golub, February 29, 2008.
   'Google's PageRank, multilevel solvers, and Gene's ranking'. [pdf]

2007

1. ICIAM 2007 - 6th International Congress on Industrial and Applied Mathematics, Zuerich, July 2007, invited (mini-symposium).
   'Markov Chains and Web Ranking: a Multilevel Adaptive Aggregation Method'. [pdf]
2. Center for Plasma Astrophysics, K.U. Leuven, July 2007.
   'Numerical Methods for Calculating Planetary Outflow Profiles with Critical Points'. [pdf]
3. Waterloo Symposium in Undergraduate Mathematics, 9 June 2007.
   'Supersonic Planetary Flow Simulations and the Origin of Life'. [pdf]
4. 15th Annual Conference of the CFD Society of Canada, Toronto, May 27-31, 2007.
   'Direct Numerical Solution of the Steady 1D Compressible Euler Equations for Transonic Flow Profiles with Shocks'. [presentation pdf] [paper pdf]
5. CAIMS 2007 Annual Conference 2007, Banff, May 2007, invited (numerical linear algebra session).
   'Markov Chains and Web Ranking: a Multilevel Adaptive Aggregation Method'. [pdf]
6. Computer Science Department/PIMS, University of British Columbia, Vancouver, May 2007.
   'Markov Chains and Web Ranking: a Multilevel Adaptive Aggregation Method'. [pdf]
7. Thirteenth Copper Mountain Conference on Multigrid Methods, March 2007.
   'Multilevel adaptive aggregation for Markov chains, with application to web ranking'. [pdf]

2006

1. Third Canadian Solar Workshop, Montreal, November 2006.
   'Solar Wind-like Outflows from Planetary Atmospheres'. [pdf]
2. 7th World Congress on Computational Mechanics, Los Angeles, July 16 - 22, 2006.
   `LSFEM for Scalar Hyperbolic Conservation Laws: Convergence and Numerical Conservation'. [pdf]
3. 17th Canadian Symposium on Fluid Dynamics, Toronto, June 17-19, 2006.
   `Numerical simulation of supersonic escape from planetary atmospheres'. [pdf]
4. CAIMS-MITACS Joint Annual Conference, Toronto, June 16-20, 2006.
   `Scalable algebraic multigrid on Blue Gene/L'. [pdf]
5. Ninth Copper Mountain Conference on Iterative Methods, April 2 - April 7, 2006.
   `Improving Coarsening and Interpolation for Algebraic Multigrid'. [pdf]

2005

1. First SHARCNET/HPCVL Joint Symposium on High Performance Computing and Applications, Toronto, October 11, 2005, invited presentation.
   `A Lightweight, Scalable Grid Computing Framework for Parallel Bioinformatics Applications'. [pdf]
2. Fifth Foundations of Computational Mathematics conference, Santander, 30 June-9 July 2005.
   `Optimal Order Parallel Algebraic Multigrid Preconditioners'. [pdf]
3. 19th International Symposium on High Performance Computing Systems and Applications, Guelph, May 15-18, 2005.
   `A Lightweight, Scalable Grid Computing Framework for Parallel Bioinformatics Applications'. [pdf]
4. Seventh IMACS International Symposium on Iterative Methods in Scientific Computing, Toronto, May 5-8, 2005.
   `Reducing Complexity in Algebraic Multigrid'. [pdf]
5. Southern Ontario Numerical Analysis Day, Waterloo, April 29, 2005, invited presentation.
   `Scalable sparse matrix solvers on supercomputers'. [pdf]
6. Twelfth Copper Mountain Conference on Multigrid Methods, April 3-8, 2005.
   `Coarsening and Interpolation in Algebraic Multigrid: a Balancing Act'. [pdf]

2004

1. Lehrstuhl fuer Simulation, Department of Computer Science, Universitaet Erlangen-Nuernberg, 24 June 2004.
   `Least-Squares Finite Element Methods for Nonlinear Hyperbolic PDEs'. [pdf]
2. Abteilung fuer Angewandte Mathematik, University of Feiburg, 17 June 2004.
   `Numerical Conservation Properties of Least-Squares Finite Element Methods for Scalar Hyperbolic Conservation Laws'. [pdf]
3. Center for Plasma Astrophysics, K.U. Leuven, 15 June 2004.
   `Least-Squares Finite Element Methods for Nonlinear Hyperbolic PDEs'. [pdf]
4. Department of Applied Mathematics Colloquium, University of Colorado at Boulder, April 2004.
   `Least-Squares Finite Element Methods for Nonlinear Hyperbolic PDEs'. [pdf]
5. Eighth Copper Mountain Conference on Iterative Methods, March 28 - April 2, 2004.
   `Reducing Complexity in Algebraic Multigrid'. (with Ulrike Meier Yang) [ppt]
6. Department of Applied Mathematics Seminar, University of Waterloo, January 2004.
   `Least-Squares Finite Element Methods for Nonlinear Hyperbolic PDEs'. [pdf]

2003

1. Bioinformatics Supergroup Seminar. University of Colorado at Boulder, November 2003.
   `A Software Framework for Parallel Bioinformatics on Computational Grids'. [pdf]
2. Center for Applied Scientific Computing Seminar. Lawrence Livermore National Laboratory, California, August 2003.
   `Numerical Conservation Properties of Least-Squares Finite Element Methods for Scalar Hyperbolic Conservation Laws'. [pdf]
3. 2003 SIAM Annual Meeting. Montreal, Canada, June 2003.
   `H(div)-Conforming Least Squares Finite Element Methods for Nonlinear Hyperbolic Conservation Laws'. [pdf]
4. 2003 Copper Mountain Conference on Multigrid Methods. Copper Mountain, Colorado, April 2003.
   `Least-Squares Finite Element Methods for Nonlinear Hyperbolic Conservation Laws'. [pdf]
5. 2003 ACM Symposium on Applied Computing. Melbourne, Florida, March 2003.
   `A lightweight Java Taskspaces framework for scientific computing on computational grids'. [pdf]

2002

1. University of Erlangen, Department of Computer Science. June 2002.
   `Scientific Computing Methods for Plasma Physics Simulation'. [pdf]

2001

1. First SIAM-EMS Conference (2001). Berlin, Germany, September 2001.
   `Multi-Dimensional Upwind Constrained Transport of Divergence-Free Fields on Unstructured Grids'. [pdf]
2. 2001 Gesellschaft fuer Angewandte Mathematik und Mechanik (GAMM) annual meeting. ETH Zuerich, Switzerland, February 2001.
   `Overcompressive shocks in 3D magnetohydrodynamic bow shock flows'. [ppt]

2000

1. Eighth International Conference on Hyperbolic Problems (2000). Magdeburg, Germany, March 2000.
   `Multiple-front 3D MHD bow shock flows with intermediate shock segments'. INVITED.