Personal Data

Full name

Nicolas Francesco Van Goethem

Publishing name

Nicolas Francesco Van Goethem

Birthday

1976-03-12T00:00:00

Academic Degrees

AGREGAÇÃO(0)

Degree date

2014

Final grade

"qualified with unanimity of the jury"

Degree granting institution

Outra

School / College / Campus

Other

Thesis title

abilitazione alle funzioni di professore di seconda fascia in analisi matematica, probabilita e statistica matematica

Supervisor

François Dupret

Co-supervisor

Eric Van der Giessen

Scientific area

Analisi matematica

DOUTORAMENTO(6)

Degree date

2007

Final grade

"félicitations du jury"

Degree granting institution

Outra

School / College / Campus

Other

Thesis title

Mesoscopic modelling of the geometry of dislocations and point-defect dynamics in single crystals

Supervisor

François Dupret

Co-supervisor

Eric Van der Giessen

Scientific area

Modelaçao matematica, mecânica, dislocaçoes

LICENCIATURA(5)

Degree date

1999

Final grade

"grande distinction" (17.5/20)

Degree granting institution

Outra

School / College / Campus

Other

Thesis title

Rotating magnetic fields in the Raleigh-Bénard problem

Supervisor

Co-supervisor

Scientific area

Applied mathematics, Mechanics

Profissional activity

Period Position Institution
01/07/2014 - 30/6/2019 Faculty researcher (Investigador FCT 2013) Faculdade de Ciências, Universidade de Lisboa
01/12/2012 - 30/06/2014 Contract researcher ERC grant "Quasistatic and Dynamic Evolution Problems in Plasticity and Fracture" (PI: Gianni Dal Maso)
SISSA, Trieste
01/04/2008 - 30/11/2012 Faculty researcher (Ciências 2007) CMAF (Centro de Matemática e Aplicações Fundamentais) is a research unit at Faculdade de Ciências da Universidade de Lisboa.
01/2007 - 02/2008 Post-Doc ER fellowship Ecole Polytechnique, Palaiseau, France
09/2003 - 12/2003 Marie Curie fellowship Mathematics department, University College London, UK
09/2000 - 12/2006 Research assistant Université Catholique de Louvain
09/1999 - 08/2000 Researcher Mathematics department, Universita di Pisa, Italy.

Area of scientific activity

Area of scientific activity

- Magnetohydrodynamics and crystal growth;
- Calculus of variations (shape and topology optimization, minimization problems in mechanics);
- Mathematical modelling of defects in solids: brittle and ductile fracture, damage evolution (theory, modelling and computations); dislocations, disclinations, point-defects (theory, modelling and computations);
- Crystal growth (technological application);
- Numerical simulation: computational elasto-plasticity, level-set method;
- Topological derivative (theory, applications, and numerical simulations);
- Gamma convergence and Image processing;
- Theory of Cartesian currents
- Non-linear elasticity
- Plate and shell models
- Continuum mechanics and Thermodynamics (fundamentals, theory and applications)

Specialization domain

My major axis of research is the mathematical modelling of defect in solids. This encompasses the theoretical analysis and numerical simulation of point- and line-defects in single crystals. The main difficulty is to construct a complete thermodynamic model accounting for field concentration properties at the defect lines, and relying on solid mathematical basis. These tensors are at the basis of plasticity, thus related to the elastic strain incompatibility, obeying non-standard evolution equations, which I also describe and analyze in my works. Mechanical and mathematical framework to address the problem are discussed in my publications.

Another line of research is damage and crack nucleation and propagation in brittle and ductile elasto-plastic materials. The mathematical tools needed for the analysis are mainly variational and a numerical treatment is done with finite elements and level-sets. Numerical simulations are also performed with home-made codes.

Current main scientific area

I currently develop a 3D theory of dislocations to describe the geometry and the thermodynamical properties of dislocations which are line defects in crystals. The tools involved appeal to differential geometry, functional and real analysis, geometric analysis. The study must account for the various scales of matter description, and provide a link between them. In damage mechanics, the main interest is to develop a quasi-static damage-based crack evolution model with non-interpenetration and traction/compression behaviour. In general the open problems such as nucleation, propagation and bifurcation criteria for cohesive fracture are addressed. Theoretical as well as numerical and computational issues are strongly interrelated and must be addressed at every stage of the research. The tools involved are analysis of (elliptic and parabolic) PDEs, variational methods, Gamma-convergence and shape optimization.

Other scientific activities

I have other research interests which encompass general variational problems in solid mechanics, in geometric measure theory, in particular as far as concentration and fractal effects in defect modeling are concerned. I also have general interests in problems of mathematical modeling of thermo-mechanical systems, in particular in system away from thermodynamic equilibrium. I also carry on a study of thin structures in nonlinear elasticity. Moreover, I have interests in some technological processes, such as Czochralski single-crystal growth from th melt.

I recently also developed a model of image processing, namely, image segmentation, classification, as based on optimal partition algorithms and a gradient-free approximation of the perimeter. This required tools fron Gamma convergence and Geometric analysis.

Experience as scientific advisor

MASTER THESIS

- I have co-supervised in 2007 at the Université Catholique de Louvain (Belgium) the master thesis of A. Robert in the field of dislocations: the objective was to develop a dynamical model of dislocations for single-crystals growing from the melt.

- I have supervised in 2013 the master tesis (laurea magistrale) of G. Maggiani (SISSA, Trieste, Italy)


PhD THESIS

- In 2012-2013-2014, have co-supervised PhD student, R.Scala (SISSA, Trieste, Italy)
- From 2016 I am co-supervising the PhD student Marcel Xavier at LNCC (Petropolis, Brazil)


POST-DOC

- Riccardo Scala (01/2017-)
- Marco Caroccia (09/2017-)


LECTURING


- I have been lecturing the exercices of Continuum Mechanics for 7 years (1999-2006).

- I was demonstrator during a semester (2003) at the University College of London.

- I give the course of Computational methods in Geology from 2009 to 2012 at the Faculty of Science of the University of Lisbon.

- I am lecturing Rational and Continuum Mechanics and Mathematical Methods in Physics since 2015.

Participations in R&D projects

Currently: INVESTIGADOR FCT 2013: IF/00734/2013

PROJECT NAME: "Mathematical theory of dislocations : geometry, analysis, and modelling"


- During the period 2006-2008, I was member of the European MULTIMAT Marie-Curie Research Training Network as an experienced researcher. This network is dedicated to new models in material science and mathematical modelling for new materials.

- Since 1999 I am member of the FEMAG (Louvain-la-Neuve, Belgium) research project dedicated to modelling and simulation of crystal growth. FEMAGsoft is today a company dedicated to software production for the simulation of crystal growth from the melt.

- I was involved in a FCT project from 2008 to 2012: PTDC/EME-PME/108751/2008.

- I have submitted a FCT 2-year R&D project in 2012 (assessed excellent but not funded).

- I have submitted a FIRB (Italy) 3-year R&D project in 2013 (assessed excellent but not funded).

- I am also involved in a Brazilian project from 2009: Jovem Cientista do Nosso Estado, Análise de Sensibilidade Topológica na Otimização Estrutural (Edital FAPERJ nº 08/2009), Brasil.

- I am member of G. Dal Maso ERC advanced research project (2012-2017) at SISSA, Italy.

Participations in R&D projects

Currently: INVESTIGADOR FCT 2013: IF/00734/2013

PROJECT NAME: "Mathematical theory of dislocations : geometry, analysis, and modelling"


- During the period 2006-2008, I was member of the European MULTIMAT Marie-Curie Research Training Network as an experienced researcher. This network is dedicated to new models in material science and mathematical modelling for new materials.

- Since 1999 I am member of the FEMAG (Louvain-la-Neuve, Belgium) research project dedicated to modelling and simulation of crystal growth. FEMAGsoft is today a company dedicated to software production for the simulation of crystal growth from the melt.

- I was involved in a FCT project from 2008 to 2012: PTDC/EME-PME/108751/2008.

- I have submitted a FCT 2-year R&D project in 2012 (assessed excellent but not funded).

- I have submitted a FIRB (Italy) 3-year R&D project in 2013 (assessed excellent but not funded).

- I am also involved in a Brazilian project from 2009: Jovem Cientista do Nosso Estado, Análise de Sensibilidade Topológica na Otimização Estrutural (Edital FAPERJ nº 08/2009), Brasil.

- I am member of G. Dal Maso ERC advanced research project (2012-2017) at SISSA, Italy.

Awards

Year Award Awarding entity
2014 FCT exploratory research project FCT
2012 Editor's choice paper Zeitschrift fuer angewandte Mathematik und Mechanik (Taylor and Francis)
2007 "Félicitations du Jury" for my PhD thesis Université catholique de Louvain
1999 "Grande distinction" for my master thesis Université catholique de Louvain

Publications

Artigos em revistas de circulação internacional com arbitragem científica

  • [10] G. Allaire, F. Jouve, N. Van Goethem, Damage and crack evolution by shape optimization methods, JOURNAL OF COMPUTATIONAL PHYSICS 230, 5010-5044, 2011. (IF=0.2.6).

Artigos em revistas de circulação internacional com arbitragem científica

  • [11] N. Van Goethem, Shape optimization for a time-dependent 4th-order equation in a dislocation model,
    C. R. ACAD. SCI. PARIS. SER. I 340, 349, 923-927, 2011. (IF=0.477).

Artigos em revistas de circulação internacional com arbitragem científica

  • [12] N. Van Goethem and F. Dupret, A distributional approach to dislocations: the case of Volterra dislocations at the continuum scale, EUROPEAN JOURNAL OF APPLIED MATHEMATICS, 23 (3), pp. 417-439, 2012. (IF=1.137).

Artigos em revistas de circulação internacional com arbitragem científica

  • [13] N. Van Goethem, A multiscale model for dislocations: from mesoscopic elasticity to macroscopic plasticity,
    JOURNAL OF APPLIED MATHEMATICS AND MECHANICS (ZAMM), 92, 7, 513-534, doi:10.1002/zamm.201100076, 2012. (IF=1.3).

Artigos em revistas de circulação internacional com arbitragem científica

  • [14] N. Van Goethem and F. Dupret, A distributional approach to the geometry of 2D dislocations at the continuum scale, ANN. UNIV. FERRARA, 58 (2), doi: 10.1007/s11565-012-0149-5, 2012

Artigos em revistas de circulação internacional com arbitragem científica

  • [15] S. Amstutz and N. Van Goethem, Topology optimization methods with gradient-free perimeter approximation,
    to appear in INTERFACES AND FREE BOUNDARIES, 14 (3), 401-430, 2012. (IF:0.708).

Artigos em revistas de circulação internacional com arbitragem científica

  • [16] N. Van Goethem, P. Areias, A finite-strain temperature-dependent ductile fracture model with configurational forces, INT. J. FRACTURE, 178 (1-2), 215-232, 2012. (IF=1.6).

Artigos em revistas de circulação internacional com arbitragem científica

  • [17] N. Van Goethem, Kr"oner's formula for dislocation loops revisited, MECH. RES. COMMUN., 46, 62-70, 2012 (IF:1.4)

Artigos em revistas de circulação internacional com arbitragem científica

  • [18] P. Areias, H.G. Silva, N. Van Goethem, M. Bezzeghoud, Damage-based fracture with electro-magnetic coupling, COMPUTATIONAL MECHANICS, 51 (3), 2013. (IF=2.6).

Artigos em revistas de circulação internacional com arbitragem científica

  • [19] P. Areias, D. Dias-da-Costa, E. B. Pires, N. Van Goethem, Asymmetric quadrilateral shell elements
    for finite strains, COMPUTATIONAL MECHANICS, 52 (1), 81-972013, 2013. (IF:2.6).

Artigos em revistas de circulação internacional com arbitragem científica

  • [20] N. Van Goethem: Fields of bounded deformation for mesoscopic dislocations.
    MATH. MECH. SOLIDS, 19 (5), 579-600, 2014 (IF:0.85)

Artigos em revistas de circulação internacional com arbitragem científica

  • [21] N. Van Goethem: Thermodynamic forces in single crystals with dislocations.
    Z. ANG. MATH. PHYS, 65 (3), 549-586, 2014 (IF:1.6)

Artigos em revistas de circulação internacional com arbitragem científica

  • [22] S. Amstutz, A. Novotny,N. Van Goethem, Minimal partitions and image classification
    with a gradient-free perimeter approximation, INV. PBL. IMAGING,8 (2), 361-387, 2014 (IF:1.138)

Artigos em revistas de circulação internacional com arbitragem científica

  • [23] S. Amstutz, A. Novotny, N. Van Goethem, Topological sensitivity analysis for
    elliptic differential operators of order 2m, J. DIFF. EQS., 256 (4), 1735-1770,2014 (IF: 1.8)

Artigos em revistas de circulação internacional com arbitragem científica

  • [24] G. Maggiani, R. Scala, N. Van Goethem. A compatible-incompatible decomposition of symmetric tensors in L^p with application to elasticity, MATHEMATICAL METHODS IN THE APPLIED SCIENCES,38 (18), 5217-5230. 2015 (IF=1.0).

Artigos em revistas de circulação internacional com arbitragem científica

  • [25] N. Van Goethem , Cauchy elasticity with dislocations in the small strain assumption, APPL. MATH. LETT., 96, 94-99, 2015 (IF=1.7)

Artigos em revistas de circulação internacional com arbitragem científica

  • [26] S. Amstutz and N. Van Goethem, ANALYSIS OF THE INCOMPATIBILITY OPERATOR AND APPLICATION IN INTRINSIC ELASTICITY WITH DISLOCATIONS, Siam J. Math. Analysis, 48 (1), 320-348, 2016 (IF=1.8)

Artigos em revistas de circulação internacional com arbitragem científica

  • [27] R. Scala, N. Van Goethem, CURRENTS AND DISLOCATIONS AND THE CONTINUUM SCALE, Meth. Appl. Analysis, 23 (1),1-34, 2016

Artigos em revistas de circulação internacional com arbitragem científica

  • [28] N. Van Goethem, DIRECT EXPRESSION OF INCOMPATIBILITY IN CURVILINEAR SYSTEMS. The ANZIAM Journal, 58, 33-50, 2016 (IF=1.0)

Artigos em revistas de circulação internacional com arbitragem científica

  • [29] N. Van Goethem, DISLOCATION-INDUCED LINEAR-ELASTIC STRAIN DYNAMICS BY CAHN-HILLIARD-TYPE EQUATIONS, Math. Mech.Complex. Syst., 4 (2), 169-195, 2016

Artigos em revistas de circulação internacional com arbitragem científica

  • [30] R. Scala, N. Van Goethem, CONSTRAINT REACTION AND THE PEACH-KOEHLER FORCE FOR DISLOCATION NETWORKS, Math. Mech. Complex. Syst., 4 (2), 105-138, 2016

Artigos em revistas de circulação internacional com arbitragem científica

  • [31] N. Van Goethem, THE FRANK TENSOR AS A BOUNDARY CONDITION IN INTRINSIC LINEARIZED ELASTICITY, J.
    Geom. Mech., 8(4), 391-411, 2016 (IF=0.6)

Artigos em revistas de circulação internacional com arbitragem científica

  • [32] S. Amstutz and N. Van Goethem, INCOMPATIBILITY-GOVERNED ELASTO-PLASTICITY FOR CONTINUA WITH DISLOCATIONS, Proc. R. Soc. Lond., Ser. A, Math. Phys. Eng. Sci., 2017. (IF=1.8)

Artigos em revistas de circulação internacional com arbitragem científica

  • [33] N. Van Goethem, FRONT MIGRATION FOR THE DISLOCATION STRAIN IN SINGLE CRYSTALS, Commun. Math. Sci., 15(7), 1843-1866, 2017.

Artigos em revistas de circulação internacional com arbitragem científica

  • [34] M. Xavier, N. Van Goethem , A. Novotny, J.-M.l Faria, E. Fancello, Topological Derivative-Based Fracture Modelling in Brittle Materials: A Phenomenological Approach, Eng. Fract. Mech., 2017 (IF=2.0)

Artigos em revistas de circulação internacional com arbitragem científica

  • [35] R. Scala, N. Van Goethem , Analytic and geometric properties of dislocation singularities, Proc. R. Soc. Edinburgh: Section A Math., 2018

Artigos em revistas de circulação internacional com arbitragem científica

  • [3] N. Van Goethem, “Variational problems on classes of convex domains”, COMMUNICATION IN APPLIED ANALYSIS, 8, (3), 353-371, 2004

Artigos em revistas de circulação internacional com arbitragem científica

  • [4] N. Van Goethem, A. de Potter, N. Van den Bogaert, F. Dupret, “Dynamic Prediction of Point Defects in Czochralski Silicon Growth. An Attempt to Reconcile Experimental Defect Diffusion Coefficients with the V/G criterion”, JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 69, 320–324, 2008. (IF=1.527).

Artigos em revistas de circulação internacional com arbitragem científica

  • [6] N. Van Goethem, A.A. Novotny, Crack Nucleation Sensitivity Analysis, MATHEMATICAL METHODS IN THE APPLIED SCIENCES, 33 (16), 2010. (IF=1.0).

Artigos em revistas de circulação internacional com arbitragem científica

  • [7] N. Van Goethem, The non-Riemannian dislocated crystal: a tribute to Ekkehart Kröner, JOURNAL OF GEOMETRIC MECHANICS, 2 (3), 2010. (IF=1.182).

Artigos em revistas de circulação internacional com arbitragem científica

  • [8] N. Van Goethem, Incompatibility in single crystals: Kröner's formula revisited, JOURNAL OF ELASTICITY, 103, (1), 2011. (IF=1.8)

Artigos em revistas de circulação internacional com arbitragem científica

  • [9] P. Areias, N. Van Goethem and E.B. Pires, A damage model for ductile crack nucleation and evolution, COMPUTATIONAL MECHANICS 47 (6), 641-656, 2011. (IF=2.6).

Capítulos de livros

  • [5] G. Allaire, F. Jouve, N. Van Goethem, A level set method for the numerical simulation of damage evolution,
    in PROCEEDINGS OF ICIAM 2007 ZÜRICH, R. Jeltsch and G. Wanner eds., EMS, Zürich, 2009

Outras publicações

  • Thesis chapter: N. Van Goethem and F. Dupret, “A distributional approach to the geometry of 2D dislocations at the mesoscale”<br><br>Available online: http://adsabs.harvard.edu/abs/2007physics...3227V

Patentes

  • Patented code production for Femagsoft software company for industrial crystal growth. From SOPARTEC
    (Place de l’Université 1, 1348 Louvain-la-Neuve, Belgique, Nr. d’entreprise: 0402.978.679)

Publicações em actas de encontros científicos

  • N. Van Goethem, P. Areias, E. B. Pires, "A temperature-dependent damage model for ductile crack initiation and propagation with finite strains", CFRAC CONGRESS 2011 (CIMNE), Barcelona, 2011.


    H.G. Silva, P. Areias, N. Van Goethem, M. Bezzeghoud, ''Electrification Processes during Solid Fracture Causing Electromagnetic Emissions", CFRAC2011 (CIMNE), Barcelona, 2011.


    P. Areias, N. Van Goethem and E. B. Pires, ''Constrained ALE-Based Discrete Fracture in Shells with Quasi-Brittle and Ductile Materials``, CFRAC2011 (CIMNE), Barcelona, 2011.


    H.G. Silva, P. Areias, J. E. Garçao, N. Van Goethem, M. Bezzeghoud,
    ''Fracture of piezoelectric materials causing electromagnetic emissions", Mathematical modelling and numerical simulations for geophysics (GEOMAT'11).


    R. Rolinsky, L. Wu, N. Van Goethem, B. Delsaute, F. Bioul, N. Van den Bogaert, V. Regnier, F. Dupret, "Dynamic Simulation of Bulk Crystal Growth", Proc. 9th Scientific and Business Conference on Silicon Technology, Photovoltaic and Infrared Optics (SILICON 2004), Roznov pod Radhostem, Czech Republic, November 2004, K. Vojtechovsky editor, pp. 231-234.


    L. Wu, B. Delsaute, F. Bioul, R. Rolinsky, N. Van Goethem, V. Regnier, N. Van den Bogaert, F. Dupret, "Investigation of Short and Long Term Flow Transients in the Czochralski Silicon Growth Process", Proc. 14th Int. Conf. on Crystal Growth (ICCG-14), Grenoble, France, August 2004, paper 1223, p. 653.


    R. Rolinsky, L. Wu, B. Delsaute, F. Bioul, N. Van Goethem, N. Van den Bogaert, V. Regnier, F. Dupret, "Development of Off-Line Control Techniques to Optimize the Czochralski Silicon Growth Process", Proc. 14th Int. Conf. on Crystal Growth (ICCG-14), Grenoble, France, August 2004, paper 1224, p. 574.


    F. Bioul, N. Van Goethem, L. Wu, B. Delsaute, R. Rolinsky, N. Van den Bogaert, V. Regnier, F. Dupret, "Optimization of the Czochralski Silicon Growth Process by Means of Configured Magnetic Fields", Proc. International Workshop on Flow Control by Tailored Magnetic Fields (FLOWCOMAG), Dresden, Germany, April 2004, 2 p.


    F. Dupret, N. Van den Bogaert, V. Regnier, R. Rolinsky, L. Wu, N. Van Goethem, B. Delsaute, F. Bioul, "Time-Dependent Modeling of the Entire Crystal Growth Process", Proc. Advanced Crystal Growth Conference and 2003 International Symposium on Substrate Engineering / Nano SOI Technology for Advanced Semiconductor Devices (ACGT & SNS), Seoul, Korea, November 2003, P.C. Kim editor, p. A03.


    F. Dupret, N. Van den Bogaert, V. Regnier, R. Rolinsky, L. Wu, N. Van Goethem, B. Delsaute, F. Bioul, "Time-Dependent Modeling of the Entire Crystal Growth Process", Proc. 4th International Workshop on Modeling in Crystal Growth, Fukuoka, Japan, November 2003, N. Imaishi, K. Kakimoto, Ch.-W. Lan editors, pp. 18-19.


    F. Dupret, N. Van den Bogaert, V. Regnier, L. Wu, R. Rolinsky, N. Van Goethem, B. Delsaute, F. Bioul, "Time-Dependent Modeling of the Czochralski Silicon Growth Process Taking Melt Convection into Account", Proc. International Symposium on Processing Technology and Market Development of 300mm Si Materials (ISPM-300mm Si), Beijing, China, September 2003, pp. 20-21.


    R. Rolinsky, L. Wu, N. Van Goethem, B. Delsaute, F. Bioul, N. Van den Bogaert, V. Regnier, F. Dupret, "Numerical Modeling of Bulk Crystal Growth", Proc. 8th Scientific and Business Conference on Silicon Technology, Photovoltaic and Infrared Optics (SILICON 2002), Roznov pod Radhostem, Czech Republic, novembre 2002, K. Vojtechovsky editor, pp.310-313.


    N. Van den Bogaert, R. Rolinsky, L. Wu, B. Delsaute, N. Van Goethem, V. Regnier, F. Dupret, "Global Dynamic Modeling of Czochralski Growth : Simulation of the Entire Growth Process Taking the Complex Geometrical Evolution of the System into Account", Proc. 13th Int. Conf. on Crystal Growth (ICCG-13), Kyoto, Japan, July-August 2001, poster 04a-K32-02, p. 498.


    V. Regnier, L. Wu, R. Houtermans, B. Delsaute, N. Van Goethem, R. Rolinsky, N. Van den Bogaert, F. Dupret, "Numerical Modeling of Melt Convection in Czochralski Growth : From 2D to 3D Models; From Experiments to Simulations", Proc. 13th Int. Conf. on Crystal Growth (ICCG-13), Kyoto, Japan, July-August 2001, poster 04a-K32-03, p. 499.


    F. Dupret, N. Van den Bogaert, V. Regnier, R. Rolinsky, L. Wu, N. Van Goethem, B. Delsaute, "Principal Issues of Bulk Crystal Growth Numerical Modeling", Proc. 3d International Workshop on Modeling in Crystal Growth, Hauppauge, New York, USA, 18-20 October 2000, pp. 9-10.

Teses

  • [1] Influence d'un champ magnétique tournant dans le problème de Raleigh-Bénard (Master thesis, unpublished)

Teses

  • [2] Mesoscopic modelling of the geometry of dislocations and point-defect dynamics in single crystals (PhD thesis)

    Available online: http://edoc.bib.ucl.ac.be:81/

Teses

  • [31] N. Van Goethem, INCOMPATIBILITY-GOVERNED SINGULARITIES IN LINEAR ELASTICITY WITH DISLOCATIONS, Math.Mech. Solids, 2017 (IF=1.8)

Communications

Comunicações orais por convite

- 01/2016: NYU-Oxford Workshop on Mathematical Models of Defects and Patterns, Courant Institute
of Mathematical Sciences New York University

"Topology optimization and Image classication with gradient-free perimeter approximation"

-03/2015: CIDMA, University of Aveiro (Portugal)

"Dislocations at the continuum scale: current formalism and constraint reaction"

- 08/2014: Workshop on Shape and Topology Optimization with PDE constraints (In honnour of J.
Sokolowski), LNCC Petropolis (Brazil)

- 07/2014: Workshop on Trends in Non-Linear Analysis, IST Lisbon (Portugal)

- 01/2014 CMAF, Lisboa and IST, Lisboa (Portugal)

-10/2013: Technische Universität Dortmund (Germany)

"Thermodynamic forces in single crystals with dislocations"

- 10/2013: Workshop on Energy/Entropy-Driven Systems and Applications, WIAS Berlin (Germany)

"Ductile fracture with configurational forces"

- 05/2012: Phys. Dep., Universidade de Evora, Portugal

- 09/2012: Workshop on plasticity and fracture, Universita di Udine (Italia)

- 08/2011: CENTRO PEDRO PASQUAL, Benasque (Spain), School and conference on PDEs, "Topology optimization methods with gradient-free perimeter approximation"

- 04/2011: Phys. Dept., UNIVERSIDADE DE EVORA, Portugal, "An introduction to dislocation theories"

- 10/2010: Invited talk at the Mathematics department of UNIVERSIDADE NOVA de LISBOA, Portugal: "Damage and crack evolution by shape optimization methods"

- 8/2010: Invited talk at the WSA2010 workshop on Recent advances in topological sensitivity analysis at LNCC, PETROPOLIS, Brazil: «Damage and crack evolution by shape optimization methods»

- 9/2009: Invited talk at the EUROMECH 9 conderence, IST, LISBON, Portugal: « Ductile Fracture: Constrained Strong Ellipticity Condition And NonSmooth Problems »

- 6/2009: Invited talk at the WCSMO 8 conference, LNEC, LISBON, Portugal: « Topological sensitivity analysis for damage evolution »

- 5/2009: Invited talk at the SMAI meeting, NICE, France: « Damage evolution by a shape and topological sensitivity method »

- 9/2008: Invited talk at the HAUSDORFF centre for mathematics, UNIVERSITY OF BONN, Germany: « Damage evolution by a shape and topological sensitivity method »

- 3/2008: Invited talk at the CMAF, UNIVERSITY OF LISBON, Portugal: « Damage evolution by a shape and topological sensitivity method »

- 09/2007: Invited talk at the OXMOS meeting at the Mathematics department of the OXFORD UNIVERSITY, UK: « A brief review of the geometry of dislocations in single crystals »

- 04/2007: Invited talk at the Academy of Science of the University of PRAGUE, Czech Republic: « Damage evolution by a shape and topological sensitivity method »

- 10/2005: Invited talk at ISPN 2 Conference, KAOSHIUNG, Taiwan: « Dynamic prediction of defect formation in Czochralski silicon growth»

- 8/2005: Invited talk at the 2nd international conference of Applied Mathematics, PLOVDIV, Bulgaria: « A distributional approach to dislocations »

- 11/2003: Invited talk at the UNIVERSITY COLLEGE OF LONDON, UK: « Variational Problems on Classes of Convex Domains »

- 10/2000: Invited talk at the Mathematics department of UNIVERSITE CATHOLIQUE DE LOUVAIN, Belgium: « Variational Problems on Classes of Convex Domains »

- 9/2000: Invited talk at the FGI Conference on Optimisation, UNIVERSITY OF MONTPELLIER, France: « Variational Problems on Classes of Convex Domains »