Research
Home, Research, Teaching, Software
Skills and interests
Numerical Linear Algebra, Iterative Methods, Computational PDEs/IEs, Algorithms.
Publications
Journal Papers (J): 2, Preprints (P): 1, Conference Papers (C): 1, Reports (R): 4.
[P1] N. Venkovic and H. Anzt (2025) Permutation-avoiding FFT-based convolution. arXiv preprint, arXiv:2506.12718.
[PhD] N. Venkovic (2023) Preconditioning strategies for stochastic elliptic partial differential equations. PhD thesis, Université de Bordeaux.
[R4] N. Venkovic, P. Mycek, L. Giraud and O.P. Le Maître (2021) Recycling Krylov subspace strategies for sequences of sampled stochastic elliptic equations. RR-9425, Inria Bordeaux-Sud Ouest. hal-03366966.
[R3] N. Venkovic, P. Mycek, L. Giraud and O.P. Le Maître (2020) Comparative study of harmonic and Rayleigh-Ritz procedures with application to deflated conjugate gradients. Cerfacs Technical Report, TR-PA-20-3.
[R2] N. Venkovic and L. Graham-Brady (2018) Parallel FFT-based solver for periodic Lippmann-Schwinger equations discretized on structured grids. Research Report. Johns Hopkins University.
[R1] N. Venkovic (2017) Computation of 2D anisotropic elastic Green’s functions and their gradients. Research Report. Johns Hopkins University.
[J2] N. Venkovic, L. Sorelli and F. Martirena (2014) Nanoindentation study of calcium silicate hydrates in concrete produced with effective microorganisms-based bioplasticizer. Cement and Concrete Composites 49, 127-139.
[C1] N. Venkovic, M. Lebeau and J.-M. Konrad (2013) Geostatistical assessment of the hydraulic conductivity of an embankment dam. GeoMontreal 2013 66th Canadian Geotechnical Conference, 8 pp.
[J1] N. Venkovic, L. Sorelli, B. Sudret, T. Yalamas and R. Gagné (2013) Uncertainty propagation of a multiscale poromechanics-hydration model for poroelastic properties of cement paste at early-age. Probabilistic Engineering Mechanics 32, 5-20.
Talks
[17] N. Venkovic and H. Anzt (October 23-24, 2025) Iterative methods for sparse approximate inverses of symmetric positive-definite matrices. GAMM Workshop on Applied and Numerical Linear Algebra (ANLA 2025), University of Bologna, Bologna, Italy. [pdf]
[16] N. Venkovic and H. Anzt (October 16-17, 2025) Randomized short-recurrence iterative methods for approximate low-rank factorizations. GAMM Workshop on Computational and Mathematical Methods in Data Sciences (COMinDS 2025), Technical University of Chemnitz, Chemnitz, Germany. [pdf]
[15] N. Venkovic (Avril 16, 2025) Implementations of locally optimal block preconditioned conjugate gradient (LOBPCG) eigensolvers. Group Seminar in Computational Mathematics, Technical University of Munich, Heilbronn, Germany. [pdf]
[14] N. Venkovic, P. Mycek, L. Giraud and O.P. Le Maître (June 20, 2023) Preconditioners based on Voronoi quantizers of random coefficient fields for the iterative solves of stochastic elliptic partial differential equations. Sparse Days 2023, Cerfacs, Toulouse, France. [pdf]
[13] N. Venkovic, P. Mycek, L. Giraud and O.P. Le Maître (March 18, 2019) Recycling Krylov subspace strategies to solve stochastic elliptic equations. Uncertainty Quantification and OPtimization (UQOP2019), Sorbonne University, Paris, France. [pdf]
[12] N. Venkovic (December 10, 2018) 1D problems with recycling Krylov subspaces. Group Meeting in Parallel Algorithms, Cerfacs, Toulouse, France. [pdf]
[11] N. Venkovic (December 11, 2017) Computational mechanics and stochastic simulation of random polycrystals. Graduate Board Examination, Whiting School of Engineering, Johns Hopkins University, Baltimore, MD, USA. [pdf]
[10] N. Venkovic (October 28, 2017) Homogenization based on realization-dependent Hashin-Shtrikman functionals of piecewise polynomial trial polarization fields. Group Meeting of Prof. L. Graham-Brady, Johns Hopkins University, Baltimore, MD, USA. [pdf]
[09] N. Venkovic (October 4, 2017) Research Summary. Group Meeting of Prof. L. Graham-Brady, Johns Hopkins University, Baltimore, MD, USA. [pdf]
[08] N. Venkovic and L. Graham-Brady (July 17, 2017) Homogenization based on realization-dependent Hashin-Shtrikman functionals of piecewise polynomial trial polarization fields. 14th US National Congress on Computational Mechanics (USNCCM14), Montreal, QC, Canada. [pdf]
[07] N. Venkovic and L. Graham-Brady (May 25, 2016) Stochastic simulation of random material microstructures using ellipsoidal growth structures. PMC 2016, ASCE Probabilistic Mechanics & Reliability Conference, Vanderbilt University, Nashville, TN, USA. [pdf]
[06] N. Venkovic (May 11, 2016) Effect of morphological idealization on mean-field self-consistent homogenization of polycrystals. Group Meeting of Prof. L: Graham-Brady, Johns Hopkins University, Baltimore, MD, USA. [pdf]
[05] N. Venkovic (February 24, 2016) Parametric representation, morphological characterization and Eshelby tensor field analysis of planar ellipsoidal growth structures (EGS). Group Meeting of Prof. L. Graham-Brady, Johns Hopkins University, Baltimore, MD, USA. [pdf]
[04] N. Venkovic, L. Graham-Brady and K. Teferra (June 18, 2015) Stochastic morphological simulation based on partial statistical description of polycrystals. EMI 2015, ASCE Engineering Mechanics Institute Conference, Stanford University, Palo Alto, CA, USA. [pdf]
[03] N. Venkovic (February 6, 2015) Stochastic simulation of spherical growth tessellation (SGT) models based on limited microstructure data. Group Meeting of Prof. L. Graham-Brady, Johns Hopkins University, USA. [pdf]
[02] N. Venkovic (January 18, 2015) Stochastic simulation of spherical growth tessellation (SGT) models: Approach using a collective rearrangement algorithm. Group Meeting of Prof. L. Graham-Brady, Johns Hopkins University, USA. [pdf]
[01] N. Venkovic (November 7, 2014) Stochastic simulation of growth tessellation models based on limited microstructure data. Group Meeting of Prof. L. Graham-Brady, Johns Hopkins University, USA. [pdf]
Speaker
Posters
[5] K. Tuteja, G. Olenik, R. Mishchuk, N. Venkovic, M. Götz, A. Streit, H. Anzt, C. Debus (June 17, 2025) pyGinkgo: Python bindings for Ginkgo. PASC25 conference, Brugg, Switzerland.
[4] K. Tuteja, G. Olenik, R. Mishchuk, N. Venkovic, M. Götz, A. Streit, H. Anzt, C. Debus (June 10, 2025) pyGinkgo: A sparse linear algebra operator framework for Python. ISC High Performance 2025, Hamburg, Germany.
[3] N. Venkovic, P. Mycek, L. Giraud and O.P. Le Maître (October 8, 2020) Deflated iterative solver for stochastic elliptic PDEs. JDD 2020, Cerfacs, Toulouse, France.
[2] N. Venkovic and L. Graham-Brady (April 4, 2018) A piecewise polynomial approximation scheme based on the Hashin-Shtrikman variational principle of polycrystals. MACH 2018, Annapolis, MD, USA. [pdf]
[1] N. Venkovic and L. Graham-Brady (July 18, 2017) Homogenization based on realization-dependent Hashin-Shtrikman functionals of piecewise polynomial trial polarization fields. 14th US National Congress on Computational Mechanics (USNCCM14), Montreal, QC, Canada.
Presenter