Education

September 2014 - July 2018

Universität Heidelberg - Interdisciplinary Center for Scientific Computing

Ph. D. Mathematics

• Full time scholarship award from the Heidelberg MathComp Graduate School.
• Multilevel domain decomposition methods analysis and parallel implementation for nonsymmetric elliptic and hyperbolic, singularly perturbed problems in supercomputer clusters.
• Development of a cluster hybrid multithread+MPI parallel nonlinear particle transport in local thermodynamical equilibrium calculation code on distributed meshes based in deal.II

2011

Commisariat à l’énergie atomique et aux énergies alternatives

International School of Nuclear Engineering

• Week course in the main topics of nuclear engineering: core physics, thermal hydraulics, materials, fuel, nuclear waste with CEA experts.

July 2001 - June 2007

Instituto Balseiro, Universidad Nacional de Cuyo

Nuclear Engineer

• Full time scholarship award from the Argentina National Atomic Energy Commission
• Specialization in neutron transport calculation using the finite element method for 3D neutronic calculations (Sn, Diffusion), scientific computing, code design and parallelization.
• Studies on heat and mass transfer, fluid mechanics, nuclear physics, reactor design, safety.

Experience

April 2024 - Present

Cooperative Institute for Research in the Atmosphere

Scientific Computing Specialist

• Solver development and high performance computing for atmospheric modeling in GeoFLOW .
• Simulation and analysis of computationally efficient, high-order, low dissipation numerics to fully leverage emerging exascale computing resources in an effort to examine and improve the accuracy of numerical treatments of atmospheric and weather phenomena.

January 2024 - March 2024

Electro Magnetic Applications, Inc.

Staff Solver Developer

• Solver development and high performance computing for the electromagnetic applications code Charge Plus .
• Simulation and analysis of charging and discharging phenomena, electric arcing, material surface and internal charging, 3D particle transport, and dielectric breakdown.

September 2020 - May 2023

University of Colorado at Boulder - Department of Applied Mathematics

Postdoctoral position with Prof. Adrianna Gillman

• Solution of Helmholtz problems with variable coefficient using high order Hierarchical Poincaré-Steklov (HPS) methods.
• Distributed memory iterative implementation of HPS for large scale problems.
• Parallel direct solution by nested-dissection-like HPS solver for applications in geological prospection in collaboration with Total Energies.
• Instructor of Calculus 3. Teaching assistant of Calculus 1. Course design for Numerical Analysis together with Prof. A. Gillman .

September 2018 - August 2020

Université de Genève - Section de Mathématiques

Postdoctoral position with Prof. Martin Gander

• Numerical analysis of domain decomposition multilevel methods for discontinuous Galerkin finite element discretizations.
• Local Fourier analysis to prove explicit parameter formulas to optimize singularly perturbed reaction-diffusion equation systems.
• Teaching assistant for numerical analysis, real analysis and differential forms.

September 2014 - July 2018

Universität Heidelberg - Interdisciplinary Center for Scientific Computing

PhD student of Prof. G. Kanschat .

• Teaching assistant for linear algebra, numerical analysis and C++ object oriented programming for scientific computing.

January 2013 – August 2014

Framatome Paris La Défense

Technical Leader and Chief Developer

• Development and maintainance of the code APOLLO2-A, a state-of-the-art fuel lattice multigroup industrial neutron transport code, part of the ARCADIA reactor analysis system used by Framatome worldwide.
• Neutron transport modeling of nuclear fuel and up to full core level including specific experimental settings. Shielding calculations with Monte-carlo methods (MCNP) and discrete ordinates (DORT/TORT).
• Qualification of the ARCADIA core calculation software for use in nuclear design and exploitation in France, Germany and USA NRC .

November 2010 – December 2012

Framatome Paris La Défense

R&D Reactor Physics

• Neutron transport deterministic and stochastic code validation and verification against experiments.
• Calculation of criticality, flux and isotopic composition evolution over complex geometries and absorbing isotope distribution (self-shielding) with different transport calculation techniques available from finite differences to Monte Carlo.
• Development of ARCADIA's explicit modeling of pin-by-pin local burnup history effects in core calculations.

July 2007 – November 2010

Comisión Nacional de Energía Atómica

Neutronic codes and methods developer

• Neutron transport calculations and methods in the framework of the Small Modular Reactor CAREM project.
• Maintainance and development of in-core and lattice nuclear fuel physics codes (PUMA, DRAGON).
• Thermal-hydraulics couplings (TherMIT).
• Code qualification for use in Argentina's nuclear reactors. ( ARN )

2009

Instituto Dan Beninson

Professor

• Nuclear Reactor Physics lecture.

Publications

[1] J. P. Lucero Lorca, D. Rosenberg, I. Jankov, C. McCoid, and M. Gander. On an efficient line smoother for the p‑multigrid 𝛾‑cycle. arXiv, 2025 https://doi.org/10.48550/arXiv.2504.10710 .

[2] M. Gander and J. P. Lucero Lorca. Optimization of two-level methods for DG discretizations of reaction-diffusion equations. ESAIM: M2AN Volume 58, Number 6, November-December 2024, pp. 2351 - 2386. doi:10.1051/m2an/2024059 .

[3] J. P. Lucero Lorca, N. Beams, D. Beecroft, A. Gillman. An iterative solver for the HPS discretization applied to three dimensional Helmholtz problems. SIAM J. Sci. Comput., 46 (2024), pp. A80-A104, doi:10.1137/21M1463380.

[4] J. P. Lucero Lorca and M. Gander. Should multilevel methods for discontinuous Galerkin discretizations use discontinuous interpolation operators? Domain Decomposition Methods in Science and Engineering XXVI. Lecture Notes in Computational Science and Engineering, vol 145 (2022). doi:10.1007/978-3-030-95025-5_28

[5] J. P. Lucero Lorca and G. Kanschat. Multilevel Schwarz preconditioners for singularly perturbed symmetric reaction-diffusion systems. Electron. Trans. Numer. Anal. , 54 (2021), pp. 89–107. doi:10.1553/etna_vol54s89

[6] G. Kanschat and J. P. Lucero Lorca. A weakly penalized discontinuous Galerkin method for radiation in dense, scattering media. CMAM , 16(4):563–577, 2016. doi:10.1515/cmam-2016-0023

Conferences

American Geophysical Union 2024 Conference

J. P. Lucero Lorca, D. Rosenberg, I. Jankov, C. McCoid and M. Gander. On an efficient line smoother for the p‑multigrid 𝛾‑cycle December 2024, Washington DC, USA

15th International Conference on Mathematical and Numerical Aspects of Wave Propagation

J. P. Lucero Lorca and A. Gillman. A comparison between Hierarchical Poincaré‑Steklov approaches for the 3D Helmholtz equation with variable coefficients July 2022, ENSTA Paris

45eme Congrès d’Analyse Numérique

Minisymposium Analyse de Fourier des discrétisations et solveurs pour la résolution des équations différentielles. (with M. Gander). July 2022, Évian‑les‑Bains

20th Copper Mountain Conference On Multigrid Methods

J. P. Lucero Lorca and M. Gander Optimization of Two‑Level Methods for DG Discretizations of Reaction‑Diffusion Equations March 2021, Copper Mountain CO, USA

26th International Domain Decomposition Conference

J. P. Lucero Lorca and M. Gander. Optimization of two-level methods for DG discretizations of reaction-diffusion equations. December 2020, Hong Kong.

Swiss Numerics Day

J. P. Lucero Lorca and M. Gander. Fourier analysis of a two level nonoverlapping Schwarz preconditioner for the solution of a DG discretization of a reaction-diffusion equation. May 2019, Lugano, Switzerland.

XXV Domain Decomposition Conference

J. P. Lucero Lorca and G. Kanschat. A nonlinear multilevel Schwarz preconditioner for a discontinuous Galerkin discretization of transport equations in local thermodynamic equilibrium. July 2018, St. John's, NL, Canada.
Organized minisymposium with M. Gander on Solvers and preconditioners for non-conforming discretization methods.

Finite Element Fair

J. P. Lucero Lorca and G. Kanschat. Parallel multiplicative Schwarz smoothers in particle transport problems. June 2017, Milan, Italy.

SIAM Conference on Computational Science and Engineering

J. P. Lucero Lorca and G. Kanschat. A fast iterative method for non-linear LTE radiative transfer problems. February-March 2017, Atlanta, GA, USA.
Organized minisymposium with J. Ragusa on Advances in numerical methods and algorithms for radiation transport

XIV Domain Decomposition Conference

J. P. Lucero Lorca and G. Kanschat. A fast iterative method for multigroup radiation diffusion problems. February 2017, Longyearbyen, Norway.

Fifth deal.II Users and Developers Workshop

J. P. Lucero Lorca and G. Kanschat. Multigrid discontinuous Galerkin method for multigroup particle transport. August 2015, College Station, TX, USA.

Computer Skills

• Linux: Advanced, with server and cluster maintenance experience.
• Programming languages: C++ (advanced, including C++17 standard), Python, C, Bash, Fortran.
• Libraries: DEAL.II, Trilinos, MPI.
• Version control: Clearcase, SVN, Git.
• Build tools: Make, CMake, Autoconf.

Languages

• English, bilingual
• French, fluent, C2
• German, intermediate, B2
• Spanish, native

Contact

CIRA/GSL/ColoradoStateUniversity/NOAA
2B414 David Skaggs Research Center
325 Broadway
Boulder, CO 80305

• e-mail
• GitHub
• Linkedin
• Twitter
• Facebook
• Instagram

Elements

i = 0;

		while (!deck.isInOrder()) {
		print 'Iteration ' + i;
		deck.shuffle();
		i++;
		}

		print 'It took ' + i + ' iterations to sort the deck.';