2017  ANZIAM 2017 Conference (Australia and New Zealand Industrial and Applied Mathematics), Hahndorf Resort, South Australia, February 2017. Invited plenary lecture.
2016  Colloquium, School of Mathematical Sciences, University of Adelaide, August 19, 2016.
 ACEMS Computational and Mathematical Foundations for Big Data Analytics Workshop, Queensland University of Technology, Brisbane, July 2016. 'Accelerated Parallel Optimization Algorithms for Distributed Data Analytics in Apache Spark'.
 University of British Columbia SCAIM Seminar Series (Scientific Computing, Applied and Industrial Mathematics), Vancouver, July 2016. 'Accelerated Parallel Optimization Algorithms for Distributed Data Analytics in Apache Spark'. [pdf]
 Faculty of Information Technology Machine Learning Flagship Seminar, Monash University, Melbourne, April 2016. 'Accelerated Parallel Optimisation Algorithms for Distributed Data Analytics in Apache Spark'. [pdf]
 Australian Society for Operations Research (ASOR) Recent Advances Conference 2016, Monash University, Melbourne, April 2016. 'Accelerated Optimization Algorithms for Distributed Big Data Recommendation in Apache Spark'. [pdf]
 Monash Workshop on Numerical PDEs, Melbourne, February 2016. '￼HighOrder Finite Volume Methods for Magnetohydrodynamics on Adaptive CubedSphere Grids'. [pdf]
2015
 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]

Mathematics Colloquium, McMaster University, April 2015.
'HighOrder Adaptive Simulation Methods for Compressible Fluid Flows with Applications in Space Physics'. [pdf]

17th Copper Mountain Conference on Multigrid Methods, March 2015.
'Fast Multilevel CoClustering: Unraveling the Multilevel Overlapping Cluster Structure of Social Network Data'. [pdf]

Waterloo Institute for Complexity and Innovation (WICI) seminar, January 2015.
'Mathematical modelling of social spreading processes'. [pdf]
2014

European Multigrid Conference, Leuven, September 2014.
'Adaptive Algebraic Multigrid for Singular Value and Tensor Decompositions'. Invited plenary lecture. [pdf]

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'.

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]

MAXIMA Seminar, School of Mathematical Sciences, Monash University, June 2014.
'Fast numerical methods for canonical tensor decomposition'. [pdf]

Monash Probability & Statistics Seminar, School of Mathematical Sciences, Monash University, June 2014.
'Fast multilevel numerical methods for Markov chains'. [pdf]

Department of Mathematics Colloquium, Hong Kong Baptist University, May 2014.
'Speeding Up ALS for Canonical Tensor Decomposition using Nonlinear Krylov Methods and Multigrid'. [pdf]

16th SIAM Conference on Parallel Processing for
Scientific Computing, February 2014, 'Parallel Algorithms for
MapReduceBased Scientific Computing: A Second Introduction'. [pdf]
2013

AMMCS2013 International Interdisciplinary Conference
on Applied Mathematics, Modeling and Computational Science, Waterloo,
2013.
'HighOrder Finite Volume Element Methods for Elliptic PDEs with Singularities, and Applications to Capillarity'. [pdf]

AMMCS2013 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]

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 minicourse
(lecture 1). [pdf]

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 minicourse (lecture 2). [pdf]

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 minicourse
(lecture 3). [pdf]

First Canadian Symposium on Numerical Analysis and Scientific Computing, Quebec City, June 2013.
'Extending Preconditioned GMRES to Nonlinear Optimization'. [pdf]

Weizmann Workshop 2013 on Multilevel Computational Methods and Optimization, Rehovot, Israel, May 2013.
'Adaptive Algebraic Multigrid for Canonical Tensor Decomposition'. [pdf]

16th Copper Mountain Conference on Multigrid Methods, March 2013.
'Adaptive Algebraic Multigrid for Singular Value Decomposition'. [pdf]

SIAM Conference on Computational Science and Engineering, Boston, February 2013.
'A Parallel and Dynamically Adaptive 3D CubedSphere Grid Framework for Hyperbolic Conservation Laws'. [pdf]

ORCA seminar, University of Guelph, February 2013.
'The Arab Spring: A simple compartmental model for the dynamics of a revolution'. [pdf]
2012

SIAM Conference on Applied Linear Algebra, Valencia, Spain, June 2012.
'Extending Preconditioned GMRES to Nonlinear Optimization'. Invited plenary lecture. [pdf]

20th Canadian Symposium on Fluid Dynamics, Toronto, June 2012.
'Hyperbolic Conservation Laws on 3D CubedSphere Grids: A Parallel HighOrder SolutionAdaptive Simulation Framework'. [pdf]

Canadian Applied and Industrial Mathematics Society (CAIMS) Annual Meeting, June 2012.
'Global approximation of singular capillary surfaces: asymptotic analysis meets numerical analysis'. [pdf]

12th Copper Mountain Conference on Iterative Methods, March 2012.
'Extending GMRES to Nonlinear Optimization, with Application to Tensor Optimization'. [pdf]
2011

Scientific Computing seminar, University of Ontario Institute of Technology, 27 September 2011.
'Extending GMRES to Nonlinear Optimization: Application to Tensor Approximation'. [pdf]

Max Planck Institute for Informatics seminar, Saarbruecken, Germany, 16 August 2011.
'A residualminimizing nonlinear optimization method applied to tensor approximation'. [pdf]

Workshop on Tensor Approximation in High Dimension, Bonn, Germany, 2 August 2011.
'Extending GMRES to Nonlinear Optimization: Application to Tensor Approximation'. [pdf]

Department of Computer Science seminar, FriedrichAlexanderUniversitaet ErlangenNuernberg, Germany, 7 July 2011.
'Extending GMRES to Nonlinear Optimization: Application to Tensor Approximation'. [pdf]

Department of Mathematics seminar, University of Trier, Germany, 5 July 2011.
'Extending GMRES to Nonlinear Optimization: Application to Tensor Approximation'. [pdf]

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]

Applied Computer Science Group seminar, Department of Mathematics, University of Wuppertal, Germany, May 2011.
'Algebraic Multigrid for the Singular Value Problem'. [pdf]

2011 SIAM Conference on Computational Science and Engineering Reno, NV, USA, March 1, 2011.
'Multilevel Aggregation of SmallWorld Graphs with Application to RandomWalk Ranking'. [pdf]

Center for Applied Scientific Computing Seminar. Lawrence Livermore National Laboratory, California, February 2011.
'Algebraic Multigrid for the Singular Value Problem'. [pdf]
2010

National Institute of Informatics seminar, Tokyo, Japan, December 8, 2010.
'Multigrid methods for Markov Chains'. [pdf]

National Institute of Informatics seminar, Tokyo, Japan, December 8, 2010.
'3D Multilevel Aggregation for Segmentation and Tracking of Live Cells'. [pdf]

National Institute of Informatics seminar, Tokyo, Japan, December 10, 2010.
'Distributed transactions in Hadoop's HBase and Google's Bigtable'. [pdf]

Institute for Aerospace Studies seminar, University of Toronto, November 23, 2010.
'Efficient solution of stationary Euler flows with critical points and shocks'. [pdf]

Tenth European MultiGrid Conference, Ischia, Italy, September 19  23, 2010.
'3D Multilevel Aggregation for Segmentation and Tracking of Live Cells'.

2010 Canadian Association of Physicists Congress,
Division of Atmospheric and Space Physics, University of Toronto, June
711, 2010.
'Numerical Modelling of MHD Space Plasmas', invited lecture. [pdf]

Oberseminar Mathematische Bildanalyse, Mathematical Image Analysis Group, Saarland University, Germany, May 21, 2010.
'3D Multilevel Aggregation for Segmentation and Tracking of Live Cells'. [pdf]

Eleventh Copper Mountain Conference on Iterative Methods, April 2010.
'Recursively Accelerated Multilevel Aggregation for Markov Chains'. [pdf]

Eleventh Copper Mountain Conference on Iterative Methods, April 2010.
'Multilevel SpaceTime Aggregation for Cell Microscopy Segmentation and Tracking'. [pdf]
2009

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]

12th Seminar "NUMDIFF" on Numerical Solution of
Differential and DifferentialAlgebraic Equations, September 1418,
2009, MartinLutherUniversity HalleWittenberg (Germany), invited
plenary lecture.
'Efficient numerical simulation of stationary Euler fluid flows with critical points and shocks'. [pdf]

14th International Conference on Random Structures and Algorithms, August 37, 2009, Poznan (Poland).
'Fast Multilevel Numerical Methods for Random Walks on Directed Graphs'. [pdf]

Workshop on Computational Methods for Hyperbolic Problems, April 2022, 2009, Waterloo, invited.
'Efficient solution of stationary Euler flows with critical points and shocks'. [pdf]

SIAM Conference on Computational Science and Engineering, March 26, 2009, Miami, invited (minisymposium).
'Smoothed Aggregation and Algebraic Multigrid Methods for Markov Chains'. [pdf]

Division of Atmospheric and Space Physics (DASP) Workshop, February 2021, 2009, Banff.
'Secondary Slow Shock Front in the Magnetosheath for Strongly Magnetized Solar Wind Conditions'. [pdf]
2008

5th Canadian Solar Workshop, November 57, 2008, Canadian Space Agency, Montreal.
'Introduction to numerical MHD modeling of the solar wind'. [pdf]

Ninth European MultiGrid Conference, October 20  24, 2008, Bad Herrenalb, Germany.
'Smoothed Aggregation Multigrid for Slowly Mixing Markov Chains'. [pdf]

Departamento de Ingenieria Matematica Seminar, Universidad de Chile, 25 April 2008.
'Fast Iterative Solvers for Markov Chains, with Application to Google's PageRank'. [pdf]

Tenth Copper Mountain Conference on Iterative Methods, April 2008.
'Smoothed Aggregation Multigrid for Slowly Mixing Markov Chains'. [pdf]

Department of Applied Mathematics Computational Mathematics Seminar, University of Colorado at Boulder, March 4, 2008.
'Smoothed Aggregation Multigrid for Slowly Mixing Markov Chains'. [pdf]

Waterloo Numerical Analysis Symposium in commemoration of Gene Golub, February 29, 2008.
'Google's PageRank, multilevel solvers, and Gene's ranking'. [pdf]
2007

ICIAM 2007  6th International Congress on Industrial and Applied Mathematics, Zuerich, July 2007, invited (minisymposium).
'Markov Chains and Web Ranking: a Multilevel Adaptive Aggregation Method'. [pdf]

Center for Plasma Astrophysics, K.U. Leuven, July 2007.
'Numerical Methods for Calculating Planetary Outflow Profiles with Critical Points'. [pdf]

Waterloo Symposium in Undergraduate Mathematics, 9 June 2007.
'Supersonic Planetary Flow Simulations and the Origin of Life'. [pdf]

15th Annual Conference of the CFD Society of Canada, Toronto, May 2731, 2007.
'Direct Numerical Solution of the Steady 1D Compressible Euler Equations for Transonic Flow Profiles with Shocks'. [presentation pdf] [paper pdf]

CAIMS 2007 Annual Conference 2007, Banff, May 2007, invited (numerical linear algebra session).
'Markov Chains and Web Ranking: a Multilevel Adaptive Aggregation Method'. [pdf]

Computer Science Department/PIMS, University of British Columbia, Vancouver, May 2007.
'Markov Chains and Web Ranking: a Multilevel Adaptive Aggregation Method'. [pdf]

Thirteenth Copper Mountain Conference on Multigrid Methods, March 2007.
'Multilevel adaptive aggregation for Markov chains, with application to web ranking'. [pdf]
2006

Third Canadian Solar Workshop, Montreal, November 2006.
'Solar Windlike Outflows from Planetary Atmospheres'. [pdf]

7th World Congress on Computational Mechanics, Los Angeles, July 16  22, 2006.
`LSFEM for Scalar Hyperbolic Conservation Laws: Convergence and Numerical Conservation'. [pdf]

17th Canadian Symposium on Fluid Dynamics, Toronto, June 1719, 2006.
`Numerical simulation of supersonic escape from planetary atmospheres'. [pdf]

CAIMSMITACS Joint Annual Conference, Toronto, June 1620, 2006.
`Scalable algebraic multigrid on Blue Gene/L'. [pdf]

Ninth Copper Mountain Conference on Iterative Methods, April 2  April 7, 2006.
`Improving Coarsening and Interpolation for Algebraic Multigrid'. [pdf]
2005

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]

Fifth Foundations of Computational Mathematics conference, Santander, 30 June9 July 2005.
`Optimal Order Parallel Algebraic Multigrid Preconditioners'. [pdf]

19th International Symposium on High Performance Computing Systems and Applications, Guelph, May 1518, 2005.
`A Lightweight, Scalable Grid Computing Framework for Parallel Bioinformatics Applications'. [pdf]

Seventh IMACS International Symposium on Iterative Methods in Scientific Computing, Toronto, May 58, 2005.
`Reducing Complexity in Algebraic Multigrid'. [pdf]

Southern Ontario Numerical Analysis Day, Waterloo, April 29, 2005, invited presentation.
`Scalable sparse matrix solvers on supercomputers'. [pdf]

Twelfth Copper Mountain Conference on Multigrid Methods, April 38, 2005.
`Coarsening and Interpolation in Algebraic Multigrid: a Balancing Act'. [pdf]
2004

Lehrstuhl fuer Simulation, Department of Computer Science, Universitaet ErlangenNuernberg, 24 June 2004.
`LeastSquares Finite Element Methods for Nonlinear Hyperbolic PDEs'. [pdf]

Abteilung fuer Angewandte Mathematik, University of Feiburg, 17 June 2004.
`Numerical Conservation Properties of LeastSquares Finite Element Methods for Scalar Hyperbolic Conservation Laws'. [pdf]

Center for Plasma Astrophysics, K.U. Leuven, 15 June 2004.
`LeastSquares Finite Element Methods for Nonlinear Hyperbolic PDEs'. [pdf]

Department of Applied Mathematics Colloquium, University of Colorado at Boulder, April 2004.
`LeastSquares Finite Element Methods for Nonlinear Hyperbolic PDEs'. [pdf]

Eighth Copper Mountain Conference on Iterative Methods, March 28  April 2, 2004.
`Reducing Complexity in Algebraic Multigrid'. (with Ulrike Meier Yang) [ppt]

Department of Applied Mathematics Seminar, University of Waterloo, January 2004.
`LeastSquares Finite Element Methods for Nonlinear Hyperbolic PDEs'. [pdf]
2003

Bioinformatics Supergroup Seminar. University of Colorado at Boulder, November 2003.
`A Software Framework for Parallel Bioinformatics on Computational Grids'. [pdf]

Center for Applied Scientific Computing Seminar. Lawrence Livermore National Laboratory, California, August 2003.
`Numerical Conservation Properties of LeastSquares Finite Element Methods for Scalar Hyperbolic Conservation Laws'. [pdf]

2003 SIAM Annual Meeting. Montreal, Canada, June 2003.
`H(div)Conforming Least Squares Finite Element Methods for Nonlinear Hyperbolic Conservation Laws'. [pdf]

2003 Copper Mountain Conference on Multigrid Methods. Copper Mountain, Colorado, April 2003.
`LeastSquares Finite Element Methods for Nonlinear Hyperbolic Conservation Laws'. [pdf]

2003 ACM Symposium on Applied Computing. Melbourne, Florida, March 2003.
`A lightweight Java Taskspaces framework for scientific computing on computational grids'. [pdf]
2002

University of Erlangen, Department of Computer Science. June 2002.
`Scientific Computing Methods for Plasma Physics Simulation'. [pdf]
2001

First SIAMEMS Conference (2001). Berlin, Germany, September 2001.
`MultiDimensional Upwind Constrained Transport of DivergenceFree Fields on Unstructured Grids'. [pdf]

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

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

