Publications and Conference presentations



Journals.

1. J. Castro, C. Gentile, E. Spagnolo-Arrizabalaga, An algorithm for the microaggregation problem using column generation, Computers & Operations Research, 144 (2022), 105817. https://doi.org/10.1016/j.cor.2022.105817. Free copy available until 23 June 2022 from https://authors.elsevier.com/c/1f0pE15N8SJMbn. Also available as Research Report RR 20-02, Istituto di Analisi dei Sistemi ed Informatica "Antonio Ruberti", Consiglio Nazionale delle Ricerche, Roma, Italia, 2020.

2. J. Castro, P. de la Lama, A new interior-point approach for large separable convex quadratic two-stage stochastic problems, Optimization Methods & Software, accepted, 2020, DOI:10.1080/10556788.2020.1841190. Also available as Research Report UPC-DEIO-JC-2020-01, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2020.

3. J. Castro, F. Sarachaga, An online optimization-based procedure for the assignment of airplane seats, TOP, 29 (2021), 204-247. Also available as Research Report UPC-DEIO-JC-2020-02, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2020.

4. J. Castro, S. Nasini, A specialized interior-point algorithm for huge minimum convex cost flows in bipartite networks, European Journal of Operational Research, 290 (2021), 857-869. Also available as Research Report DR 2018/01, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2018.

5. G. Casanellas, J. Castro, Using interior point solvers for optimizing progressive lens models with spherical coordinates, Optimization and Engineering, 21 (2020), 1389-1421. Free view-only version available from this link: https://rdcu.be/b8dmr . Previously appeared as Research Report DR 2019/01, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2019.

6. D. Baena, J. Castro, A. Frangioni, Stabilized Benders methods for large-scale combinatorial optimization, with application to data privacy, Management Science, 66 (2020), 3051-3068. Previously appeared as Research Report DR 2017/03, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2017.

7. J. Castro, J. A. González, A linear optimization based method for data privacy in statistical tabular data, Optimization Methods & Software, 34 (2019), 37-61. Previously appeared as Research Report DR 2017/02, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2017.

8. J. Castro, S. Nasini, On geometrical properties of preconditioners in IPMs for classes of block-angular problems, SIAM Journal on Optimization, 27 (2017), 1666-1693. Previously appeared as Research Report DR 2016/03, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2016.

9. J. Castro, S. Nasini, F. Saldanha-da-Gama, A cutting-plane approach for large-scale capacitated multi-period facility location using a specialized interior-point method, Mathematical Programming (series A), 163 (2017), 411-444. Free view-only version available from this link: http://rdcu.be/nkAz . Previously appeared as Research Report DR 2015/01, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2015.

10. J. Castro, Interior-point solver for convex separable block-angular problems, Optimization Methods & Software, 31 (2016) 88-109. Previously appeared as Research Report DR 2014/03, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2014.

11. J. Castro, S. Nasini, Mathematical programming approaches for classes of random network problems, European Journal of Operational Research, 245 (2015) 402-414. Previously appeared as Research Report DR 2013/01, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2013.

12. D. Baena, J. Castro, J. A. González, Fix-and-relax approaches for controlled tabular adjustment, Computers & Operations Research, 58 (2015) 41-52. Previously appeared as Research Report DR 2013/02, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2013.

13. S. Nasini, J. Castro, P. Fonseca, A mathematical programming approach for different scenarios of bilateral bartering, Statistics and Operations Research Transactions - SORT, 39 (2015) 85-108. Previously appeared as Research Report DR 2013/07, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2013.

14. J. Castro, A. Frangioni, C. Gentile, Perspective reformulations of the CTA problem with L2 distances, Operations Research, 62(4) (2014) 891-909. Previously appeared as Technical Report IASI CNR 11-19 2011. Also available as Research Report DR 2014/02, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2014.

15. S. Bocanegra, J. Castro, A.R.L. Oliveira, Improving an interior-point approach for large block-angular problems by hybrid preconditioners, European Journal of Operational Research, 231 (2013) 263-273. Previously appeared as Research Report DR 2012/06, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2012.

16. J. Castro, J. Cuesta, Solving $L_1$-CTA in 3D tables by an interior-point method for primal block-angular problems, TOP , 21 (2013) 25-47. Previously appeared as Research Report DR 2011/01, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2011.

17. J. Castro, On assessing the disclosure risk of controlled adjustment methods for statistical tabular data, International Journal of Uncertainty, Fuzziness and Knowledge-Based Systems, 20 (2012) 921-941 . Previously appeared as Research Report DR 2012/07, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2012.

18. J. Castro, J. Cuesta, Improving an interior-point algorithm for multicommodity flows by quadratic regularizations, Networks, 59 (2012) 117-131. Previously appeared as Research Report DR 2009/09, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2009.

19. J. Castro, Recent advances in optimization techniques for statistical tabular data protection, European Journal of Operational Research, 216 (2012) 257-269. Previously appeared as Research Report DR 2011/03, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2011.

20. D. Baena, J. Castro, Using the analytic center in the feasibility pump, Operations Research Letters, 39 (2011) 310-317. Previously appeared as Research Report DR 2010/03 , Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2010.

21. J. Castro, J. Cuesta, Quadratic regularizations in an interior-point method for primal block-angular problems, Mathematical Programming (series A), 130 (2011) 415-445. Previously appeared as Research Report DR 2008/07, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2008.

22. J. Castro, Extending controlled tabular adjustment for non-additive tabular data with negative protection levels, Statistics and Operations Research Transactions - SORT, 35 (2011) 3-20. Previously appeared as Research Report DR 2010/01, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2010.

23. J. A. González, J. Castro, A heuristic block coordinate descent approach for controlled tabular adjustment, Computers & Operations Research, 38 (2011) 1826-1835. Previously appeared as Research Report DR 2010/06, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2010.

24. J. Castro, J. Cuesta, Existence, uniqueness and convergence of the regularized primal-dual central path, Operations Research Letters, 38 (2010) 366-371. Previously appeared as Research Report DR 2009/08, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2009.

25. A. Alabi, J. Castro, A mathematical model of refinery operations characterised by complete horizontal integration of subsystems from purchase to product distribution, Hydrocarbon World, 4(2) (2009) 55-56.

26. D. Rosas, J. Castro, L. Montero, Using ACCPM in a simplicial decomposition algorithm for the traffic assignment problem, Computational Optimization and Applications, 44 (2009) 289-313. Previously appeared as Research Report DR 2002/04, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2002.

27. A. Alabi, J. Castro, Dantzig-Wolfe and block coordinate-descent decomposition in large-scale integrated refinery-planning, Computers & Operations Research, 36 (2009) 2472-2483. Previously appeared as Research Report DR 2008/01, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2008.

28. J. Castro, A stochastic programming approach to cash management in banking, European Journal of Operational Research, 192 (2009) 963-974. Previously appeared as Research Report DR 2004/14, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2004.

29. J. Castro, A shortest paths heuristic for statistical disclosure control in positive tables, INFORMS Journal on Computing 19(4) (2007) 520-533 . Previously appeared as Research Report DR 2004/10 Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2004.

30. J. Castro, An interior-point approach for primal block-angular problems, Computational Optimization and Applications, 36 (2007) 195-219.

31. J. Castro, Minimum-distance controlled perturbation methods for large-scale tabular data protection, European Journal of Operational Research, 171 (2006) 39-52. An extended version previously appeared as Research Report DR 2003/14, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2003.

32. J. Castro, Quadratic interior-point methods in statistical disclosure control , Computational Management Science, 2(2) (2005) 107-121.

33. J. Castro, Discussion on On self-regular IPMS by M. Salahi, R. Sotirov and T. Terlaky , TOP, 12(2) (2004) 276--277.

34. J. Castro, J. A. González, A nonlinear optimization package for long-term hydrothermal coordination , European Journal of Operational Research, 154 (2004) 641-658.

35. J. Castro, Solving difficult multicommodity problems through a specialized interior-point algorithm, Annals of Operations Research, 124 (2003), 35-48.

36. J. Castro, A specialized interior-point algorithm for multicommodity network flows , SIAM Journal on Optimization, 10 (2000), 852-877.

37. J. Castro, An interior-point algorithm for quadratic programming through separable equivalent problems (in Spanish), Qüestiió, 22 (1998), 117-142.

38. J. Castro, An implementation of a higher-order primal-dual interior-point algorithm using a predictor-corrector method for linear programming (in Spanish), Qüestiió, 22 (1998), 103-116.

39. J. Castro, N. Nabona, An implementation of linear and nonlinear multicommodity network flows , European Journal of Operational Research, 92 (1996), 37-53.

40. J. Castro, An implementation of a primal-dual interior-point algorithm with upper-bounded variables (in Catalan), Qüestiió, 19 (1995), 223-257.

41. N. Nabona, J. Castro, J. A. González, Optimum long-term hydrothermal coordination with fuel limits, IEEE Transactions on Power Systems, 10(2) (1995), 1054-1062.

42. A. Montes, J. Castro, Solving the load flow problem using the Gröbner basis , SIGSAM Bulletin of the ACM, 1995, 29(1), 1-13.

43. J. Castro, N. Nabona, Nonlinear multicommodity network flows through primal partitioning and comparison with alternative methods , Lecture Notes in Control and Information Sciences , 197 (1994), 875-884. Volume System Modelling and Optimization, eds. J. Henry and J.-P. Yvon, Springer.



Books and book chapters.

1. D. Baena, J. Castro, J.A. González, Symmetric vs asymmetric protection levels in SDC methods for tabular data, Lecture Notes in Computer Science, 11126 (2018) 3-12, eds. J. Domingo-Ferrer and F. Montes, © Springer.

2. J. Castro, A. Via, Revisiting interval protection, a.k.a. partial cell suppression, for tabular data, Lecture Notes in Computer Science, 9867 (2016) 3-14, eds. J. Domingo-Ferrer and M. Péjic-Bach, © Springer.

3. G. Lesaja, J. Castro, A. Oganian, A second order cone formulation of continuous CTA model, Lecture Notes in Computer Science, 9867 (2016) 41-53, eds. J. Domingo-Ferrer and M. Péjic-Bach, © Springer.

4. J. Castro, J.A. González, Assessing the information loss of controlled tabular adjustment in two-way tables, Lecture Notes in Computer Science, 8744 (2014) 11-23, eds. J. Domingo-Ferrer, © Springer.

5. J. Castro, A CTA model based on the Huber function, Lecture Notes in Computer Science, 8744 (2014) 79-88, eds. J. Domingo-Ferrer, © Springer.

6. J. Castro, A computational evaluation of optimization solvers for CTA, Lecture Notes in Computer Science, 7556 (2012) 11-21, eds. J. Domingo-Ferrer and I. Tinnirello, © Springer.

7. J. Castro, Comparing $L_1$ and $L_2$ distances for CTA, Lecture Notes in Computer Science, 7556 (2012) 35-46, eds. J. Domingo-Ferrer and I. Tinnirello, © Springer.

8. J. Castro, J.A. González, A tool for analyzing and fixing infeasible RCTA instances, Lecture Notes in Computer Science, 6344 (2010) 17-28, eds. J. Domingo-Ferrer and E. Magkos, © Springer.

9. J. Castro, Statistical disclosure control in tabular data, Privacy and Anonymity in Information Management Systems: New Techniques for New Practical Problem, Springer (2010), 113-131. ISBN 978-1849962377. Previously appeared as Research Report DR 2009/11 , Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2009.

10. S. Giessing, A. Hundepool, J. Castro, Rounding methods for protecting EU-aggregates, in Eurostat methodologies and working papers. Worksession on statistical data confidentiality. , Eurostat-Office for Official Publications of the European Communities, Luxembourg, 2009, 255-264. ISBN 978-92-79-12055-8.

11. J. Castro, D. Baena, Using a Mathematical Programming Modeling Language for Optimal CTA, Lecture Notes in Computer Science, 5262 (2008) 1-12, eds. J. Domingo-Ferrer and Y. Saigin, © Springer.

12. J. Castro, D. Baena, Automatic structure detection in constraints of tabular data, Lecture Notes in Computer Science, 4302 (2006) 12-24, eds. J. Domingo-Ferrer and L. Franconi, © Springer.

13. J. Castro, S. Giessing, Testing variants of minimum distance controlled tabular adjustment, in Monographs of Official Statistics. Work session on Statistical Data Confidentiality, Eurostat-Office for Official Publications of the European Communities, Luxembourg, 2006, 333-343. ISBN 92-79-01108-1.

14. J. Castro, A fast network flows heuristic for cell suppression in positive tables, Lecture Notes in Computer Science, 3050 (2004), 136-148. Volume Privacy in Statistical Databases, eds. Josep Domingo-Ferrer and Vicenç Torra, © Springer.

15. J. Castro, Computational experiments with minimum-distance controlled perturbation methods, Lecture Notes in Computer Science, 3050 (2004), 73-86. Volume Privacy in Statistical Databases, eds. Josep Domingo-Ferrer and Vicenç Torra, © Springer.

16. J. Castro, Network flows heuristics for complementary cell suppression: an empirical evaluation and extensions, Lecture Notes in Computer Science, 2316 (2002), 59-73. Volume Inference Control in Statistical Databases, ed. Josep Domingo-Ferrer, © Springer. .

17. J. Castro, Solving quadratic multicommodity problems through an interior-point algorithm, in System Modelling and Optimization XX , eds. E.W. Sachs and R. Tichatschke, Kluwer, Boston, 2003, 199-212. ISBN 1-4020-7565-0. Previously appeared as Research Report DR 2001/14, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2001.

18. J. Castro, A. Frangioni, A parallel implementation of an interior-point algorithm for multicommodity network flows , Lecture Notes in Computer Science, 1981 (2001), 301-315. Volume Vector and Parallel Processing - VECPAR 2000, eds. J.M. Palma, J. Dongarra and V. Hernández, © Springer.

19. D. Rosas, J. Castro, L. Montero, Using ACCPM in the master problem of a restricted simplicial decomposition algorithm for the traffic assignment problem , in Preprints of TRISTAN IV - Triennial Symposium on Transportation Analysis , 2001, 129-134.

20. J. Castro, Recent advances in the solution of the multicommodoty flow problem (in Spanish), Proceedings of the Congreso sobre Técnicas de Ayuda a la Decisión en la Defensa, 2001, 213-224, ISBN 84-7823-831-X. Previously appeared as Research Report DR 2000/23, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2000.

21. J. Castro, Computational experience with a parallel implementation of an interior-point algorithm for multicommodity network flows , in System Modelling and Optimization. Methods, Theory and Applications, eds. M.J.D. Powell and S. Scholtes, Kluwer, Boston, 2000, 75-95. ISBN 0-7923-7881-4.

22. J. Castro, Efficient methods for the solution of multicommodity flow problems (in Catalan), PhD thesis, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 1995. ISBN 84-688-8146-5.

23. J. Castro, N. Nabona, Primal-dual interior-point method for multicommodity network flows with side constraints and comparison with alternative methods , in System Modelling and Optimization, eds. J. Dolezal and J. Fidler, Kluwer, Boston, 1996, 451-458. ISBN 0-412-71880-4.

24. N. Nabona, J. Castro, J. A. González, Long-term hydrothermal coordination of electricity generation with power and energy constraints, in Numerical Methods in Engineering '92, eds. Ch. Hirsch, O.C. Zienkiewicz and E. Oñate, Elsevier Science, 1992, 445-452. ISBN 0-444-89794-1.



Technical and research reports.

1. J. Castro, L.F. Escudero, J.F. Monge, On solving large-scale multistage stochastic problems with a new specialized interior-point approach, Research Report UPC-DEIO-JC-2021-02, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, Barcelona, Catalonia, 2021.

2. J. Castro, New interior-point approach for one- and two-class linear support vector machines using multiple variable splitting, Research Report UPC-DEIO-JC-2021-01, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, Barcelona, Catalonia, 2021.

3. J. Castro, J.A. González, D. Baena, User's and programmer's manual of the RCTA package, Technical Report DR 2009/01, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2009.

4. J. Castro, User's and programmer's manual of the network flows heuristic package for cell suppression in 1H2D tables, Research Report DR 2004/06, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2004.

5. J. Castro, Minimum-distance controlled perturbation methods for large-scale tabular data protection, Research Report DR 2003/14, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2003.

6. J. Castro, User's and programmer's manual of the network flows heuristics package for cell suppression in 2D tables , Technical Report DR 2003/07, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2003.

7. D. Rosas, J. Castro, L. Montero, Solving the traffic assignment problem using ACCPM , Research Report DR 2002/18, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2002.

8. J. Castro, F. J. Heredia, Using modelling languages for the complementary cell suppression problem through network flows , Research Report DR 2001/03, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2001.

9. J. Castro, J.A. González, HTCOOR Program documentation , Technical Report DR 2000/12, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2000.

10. J.A. González, J. Castro, The long-term hydrothermal coordination model implemented in the HTCOOR package , Research Report DR 2000/11, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2000.

11. J. Castro, An introduction to the affine scaling algorithm for linear programming (in Spanish), Research Report DR 2000/02, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2000.

12. N. Nabona, J.A. González, J. Castro, F.J. Heredia, Optimum transmission and distribution network expansion at several voltage levels through multicommodity network flows , Research Report DR 96/07, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 1996.

13. N. Nabona, J.A. González, J. Castro, F.J. Heredia, Reference manual for the electric expansion codes (in Spanish), Technical Report DR 96/06, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 1996.

14. J. Castro, PPRN 1.0, User's Guide , Technical Report DR 94/06, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 1994.

15. J. Castro, N. Nabona, Computational tests of a nonlinear multicommodity network flow code with linear side constraints through primal partitioning , Research Report DR 94/05, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 1994.

16. J. Castro, N. Nabona, Computational tests of a linear multicommodity network flow code with linear side constraints through primal partitioning , Research Report DR 94/02, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 1994.

17. J. Castro, Efficient computation and updating of the working matrix of the primal partitioning method for multicommodity flow problems with side constraints (in Catalan), Research Report DR 93/03, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 1993.


Conference and seminar presentations and publications.

1. J. Castro, A new interior-point optimization approach for support vector machines for binary classification and outlier detection, New Bridges between Mathematics and Data Science, Universidad de Valladolid (Spain), November 2021. Invited presentation.

2. J. Castro, Interior-point method for 2-class and 1-class linear support vector machines by multiple variable splitting, United States Naval Academy Optimization and Operations Research Conference, United States Naval Academy, Annapolis, MA (USA), June 2021. Virtual conference. Invited presentation.

3. J. Castro, An interior-point solver for large block-angular problems and applications, Seminar at the Center for Operations Research, Universitat Miguel Hernández, Elx, Alacant (Spain), May 2021. Virtual seminar. Invited presentation.

4. D. Baena, J. Castro, A. Frangioni, Using a stabilized Benders algorithm for cell suppression, Joint UNECE/Eurostat Work Session on Statistical Data Confidentiality, Statistics Netherlands, The Hague (The Netherlands), October 2019. Invited presentation.

5. J. Castro, Optimization and support vector machines, 23th Latin American Summer School in Operations Research-ELAVIO XXIII, Universitat de Lleida, Lleida (Catalonia), July 2019. Invited course.

6. J. Castro, S. Nasini, A specialized interior-point algorithm for huge minimum convex cost flows in bipartite networks, Workshop in Advances in Linear Algebra and Huge-Scale Optimization, University of Edinburgh, Edinburgh (Scotland, UK), July 2019. Invited presentation.

7. P. de la Lama, J. Castro, A new interior-point approach for large two-stage stochastic problems, 30th European Conference on Operational Research-EURO 2019, University College Dublin, Dublin (Ireland), July 2019. Invited presentation.

8. D. Baena, J. Castro, A. Frangioni, Solving the cell suppression problem by a stabilized Benders method, 30th European Conference on Operational Research-EURO 2019, University College Dublin, Dublin (Ireland), July 2019. Invited presentation.

9. D. Baena, J. Castro, J.A. González, Symmetric vs asymmetric protection levels in SDC methods for tabular data, Privacy in Statistical Databases 2018, Valencia (Spain), September 2018.

10. J. Castro, An Interior-Point Solver for Large Block-Angular Optimization Problems and Applications, Google Algorithms Tech Talk , Google, Manhattan, New York, USA, 14 August 2018. Invited presentation.

11. J. Castro, A new specialized interior-point method for support vector machines, 23rd International Symposium on Mathematical Programming ISMP 2018, Bordeaux, France, July 2018. Invited presentation.

12. J. Castro, S. Nasini, A specialized interior-point algorithm for very large minimum cost flows in bipartite networks, 23rd International Symposium on Mathematical Programming ISMP 2018, Bordeaux, France, July 2018. Invited presentation.

13. J. Castro, A. Oliveira, Organization of Stream on Interior-point Methods for Large-Scale Problems, 23rd International Symposium on Mathematical Programming ISMP 2018, Bordeaux, France, July 2018.

14. J. Castro, Recent optimization approaches for tabular data protection, Seminar at Hitotsubashi University, Hitotsubashi University, Tokyo, Japan, 1 March 2018. Invited presentation.

15. J. Castro, Optimization models for tabular data protection, Seminar at the National Statistics Center, National Statistics Center, Tokyo, Japan, 28 February 2018. Invited presentation.

16. G. Casanellas, J. Castro, P. Artús, Design of progressive lenses by optimization techniques, BGSMath Workshop Maths for Industry 4.0, Universitat Pompeu Fabra, 19 February 2018. Invited presentation.

17. J. Castro, Interior-point method for support vector machines through multiple variable splitting, 4th Conference on Optimization Methods and Software, Universidad de La Habana (Cuba), December 2017. Program Committee member and invited presentation.

18. D. Baena, J. Castro, A. Frangioni, On using an improved Benders method for cell suppression. Joint UNECE/Eurostat Work Session on Statistical Data Confidentiality, Ministry of Foreign Affairs, Skopje (Macedonia), September 2017. Invited presentation.

19. J. Castro, An interior-point method for multiple variable splitting decomposition with applications, Seminar on Optimization Under Uncertainty. Applications in Agriculture, Universitat de Lleida, LLeida (Catalonia), September 2017. Invited speaker.

20. J. Castro, S. Nasini, F. Saldanha-da-Gama, Specialized interior-points in cutting plane methods for huge discrete optimization: an application to facility location, Biannual Conference of the Spanish Royal Society of Mathematics , Zaragoza (Spain), February 2017. Invited presentation.

21. J. Castro, A. Via, Revisiting interval protection, a.k.a. partial cell suppression, for tabular data, Privacy in Statistical Databases 2016, Dubrovnik (Croatia), September 2016.

22. G. Lesaja, J. Castro, A. Oganian, A second order cone formulation of continuous CTA model, Privacy in Statistical Databases 2016, Dubrovnik (Croatia), September 2016.

23. J. Castro, An interior-point solver for very large structured problems, III Workshop on Optimization Under Uncertainty in Sustainable Agriculture and Agrifood Industry , Universitat de Lleida, LLeida (Catalonia), September 2016. Invited keynote speaker.

24. J. Castro, S. Nasini, On the efficiency of preconditioners in BlockIP, an interior point package for block-angular problems, 28th European Conference on Operational Research-EURO 2016, Poznan University of Technology, Poznan (Poland), July 2016. Invited presentation.

25. G. Casanellas, J. Castro, Modelling and optimization of progressive lenses, 28th European Conference on Operational Research-EURO 2016, Poznan University of Technology, Poznan (Poland), July 2016. Invited presentation.

26. J. Castro, Interior point methods, COST/MINO PhD School on Advanced Optimization Methods 2016, Istituto di Analisi dei Sistemi ed Informatica "A. Ruberti" Consiglio Nazionale delle Ricerche, Roma (Italia), June 6-10, 2016. Invited course.

27. J. Castro, S. Nasini, F. Saldanha-da-Gama, Using an interior-point method for huge capacitated multiperiod facility location, VI International Workshop on Locational Analysis and related problems, Universitat Politècnica de Catalunya, Barcelona, November 2015.

28. J. Castro, IPMs for huge MILPs? A successful approach for capacitated multiperiod facility location, Edinburgh Research Group in Optimization Seminar, School of Mathematics, University of Edinburgh, 18 November 2015. Invited presentation.

29. J. Castro, J.A. González, A. Hundepool, Using BCD-CTA for difficult tables: a practical experiment with a real Eurostat table. Joint UNECE/Eurostat Work Session on Statistical Data Confidentiality, Statistics Finland, Helsinki (Finland), October 2015. Invited presentation.

30. J. Castro, S. Nasini, F. Saldanha-da-Gama, A specialized interior-point method for large-scale capacitated multiperiod facility location, 22nd International Symposium on Mathematical Programming ISMP 2015, Pittsburgh, USA, July 2015. Invited presentation. (Also chairman of session: Constraint integer programing.)

31. J. Castro, BlockIP: an interior-point solver for convex separable structured optimization problems, XXXV Congreso Nacional de Estadística e Investigación Operativa, Pamplona, Spain, May 2015.

32. D. Baena, J. Castro, J.A. González, Fix-and-relax approaches for controlled tabular adjustment, XXXV Congreso Nacional de Estadística e Investigación Operativa, Pamplona, Spain, May 2015.

33. G. Casanellas, J. Castro, J.C. Dürsteler, Modelling and optimization of progressive addition lenses, XXXV Congreso Nacional de Estadística e Investigación Operativa, Pamplona, Spain, May 2015.

34. J. Castro, Large-scale optimization with BlockIP, a specialized IP solver for block-angular problems, 1st Brazilian Workshop on Interior Point Methods, University of Campinas, Campinas (Brazil), April 2015. Invited keynote speaker.

35. S. Bocanegra, J. Castro, An adaptive preconditioner for primal block-angular problems by an interior point method , 1st Brazilian Workshop on Interior Point Methods, University of Campinas, Campinas (Brazil), April 2015.

36. J. Castro, An interior-point solver for convex separable block-angular problem, COST Workshop on Mathematical Models and Methods for Energy Optimization, Budapest University of Technology and Economics, Budapest (Hungary), September 2014. Invited keynote speaker.

37. J. Castro, J.A. González, Assessing the information loss of controlled tabular adjustment in two-way tables, Privacy in Statistical Databases 2014, Eivissa (Balearic Islands, Spain), September 2014.

38. J. Castro, A CTA model based on the Huber function, Privacy in Statistical Databases 2014, Eivissa (Balearic Islands, Spain), September 2014.

39. J. Castro, Tamás Terlaky, Organization of Stream on Interior Point Methods and Conic Optimization, 20th Conference of the International Federation of Operational Research Societies IFORS, Universitat Politècnica de Catalunya, Barcelona, July 2014.

40. S. Nasini, J. Castro, Specialized interior point methods for classes of random network problem, 20th Conference of the International Federation of Operational Research Societies IFORS, Universitat Politècnica de Catalunya, Barcelona, July 2014. Invited presentation.

41. S. Bocanegra, J. Castro, A. Oliveira Using hybrid preconditioners in an ipm for large block-angular problems, 20th Conference of the International Federation of Operational Research Societies IFORS, Universitat Politècnica de Catalunya, Barcelona, July 2014. Invited presentation.

42. J. Castro, X. Jiménez, BlockIP: An interior-point solver for block angular problems, 20th Conference of the International Federation of Operational Research Societies IFORS, Universitat Politècnica de Catalunya, Barcelona, July 2014. Invited presentation.

43. S. Nasini, J. Castro, Preconditioning IPMs for block-angular problems with "almost linearly dependent" constraints, International Conference on Applied Mathematical Programming and Modelling APMOD, University of Warwick (United Kingdom), April 2014. Invited presentation.

44. J. Castro, Assessing the disclosure risk of CTA-like methods. Joint UNECE/Eurostat Work Session on Statistical Data Confidentiality, Statistics Canada, Ottawa (Canada), October 2013. Invited presentation.

45. J. Castro, J.A. González, A fast CTA method without the complicating binary decisions. Joint UNECE/Eurostat Work Session on Statistical Data Confidentiality, Statistics Canada, Ottawa (Canada), October 2013. Invited presentation.

46. J. Castro, J. Cuesta, Protecting three-dimensional tables of data: An application of interior-point methods to statistical disclosure control, Fourth Mathematical Optimization Society International Conference on Continuous Optimization (ICCOPT 2013), Universidade Nova de Lisboa, Lisboa (Portugal), July 2013. Invited presentation. (Also chairman of session: Applications in design problems.)

47. S. Nasini, J. Castro, Generating random networks by linear programming approaches, Joint International 26th European Conference on Operational Research (EURO 2013)-INFORMS, Roma, Italia, July 2013. Invited presentation.

48. S. Nasini, J. Castro, Generating conditional uniform random networks by optimization procedures, International Network Optimization Conference 2013, Tenerife, Spain, May 2013.

49. J. Castro, Improving iterative solvers in IPMs: regularizations and hybrid preconditioners, Edinburgh Research Group in Optimization Seminar, School of Mathematics, University of Edinburgh, 10 October 2012. Invited presentation.

50. J. Castro, A computational evaluation of optimization solvers for CTA, Privacy in Statistical Databases 2012, Palermo (Italia), September 2012.

51. J. Castro, Comparing $L_1$ and $L_2$ distances for CTA, Privacy in Statistical Databases 2012, Palermo (Italia), September 2012.

52. J.A. González, J. Castro, Improving the solution of CTA through valid inequalities, 25th European Conference on Operational Research-EURO 2012, Vilnius University, Vilnius (Lithuania), July 2012. Invited presentation.

53. D. Baena, J. Castro, A fix and relax heuristic for controlled tabular adjustment, 25th European Conference on Operational Research-EURO 2012, Vilnius University, Vilnius (Lithuania), July 2012. Invited presentation.

54. J. Castro, A. Frangioni, C. Gentile, Solving $L_2$-CTA by perspective reformulations, 25th European Conference on Operational Research-EURO 2012, Vilnius University, Vilnius (Lithuania), July 2012. Invited presentation.

55. J. Cuesta, J. Castro, Solving $L_1$-CTA in 3D tables by an interior-point method for block-angular problems, 25th European Conference on Operational Research-EURO 2012, Vilnius University, Vilnius (Lithuania), July 2012. Invited presentation.

56. J. Castro, Organization of Stream on Data Confidentiality, 25th European Conference on Operational Research-EURO 2012, Vilnius University, Vilnius (Lithuania), July 2012.

57. J. Castro. Workshop on Techniques for tabular data protection, IDESCAT Workshop , IDESCAT, the National Statistical Institute of Catalonia, Barcelona, May 23 2012. Invited presentation.

58. D. Baena, J. Castro, The analytic center feasibility pump, XXXIII Congreso Nacional de Estadística e Investigación Operativa, Madrid, Spain, April 2012.

59. J. Castro (in collaboration with A. Frangioni, C. Gentile, and J.A. González), MILP and MIQP optimization problems from the statistical disclosure control field. Optimization, Theory, Algorithms and Applications in Economics. Workshop in applications of Optimization in Engineering, Centre de Recerca Matemàtica (CRM), Bellaterra (Catalonia), October 2011. Invited presentation.

60. J. Castro, J.A. González, Present and future research on controlled tabular adjustment. Joint UNECE/Eurostat Work Session on Statistical Data Confidentiality, Universitat Rovira i Virgili, Tarragona (Catalonia), October 2011. Invited presentation.

61. C. Gentile, J. Castro, A. Frangioni, Minimum Euclidean distance controlled adjustment problems by perspective reformulations, 42th Annual Conference of the Italian Operational Research Society - AIRO 2011 , Brescia (Italia), September 2011.

62. J. Castro, Panel discussion Challenges and Applications of MINLP, Exploratory Workshop on Mixed Integer Non-Linear Programming, Mathematical Research Institute, Universidad de Sevilla (Spain), December 2010. Invited participant to panel discussion.

63. J. Castro, A class of interior-point methods for structured problems: theory and applications, Conference on Numerical Optimization and Applications in Engineering, Mathematical Research Center, Universitat Autonoma de Barcelona, Bellaterra (Catalonia), October 2010. Invited presentation.

64. J. Castro, J.A. González, A tool for analyzing and fixing infeasible RCTA instances, Privacy in Statistical Databases 2010, Corfu (Greece), September 2010.

65. J. Castro, J. Cuesta, Existence, uniqueness and convergence of the regularized primal-dual central path, XXXII Congreso Nacional de Estadística e Investigación Operativa, A Coruña, Spain, September 2010.

66. J. A. González, J. Castro, Solving tough instances of the controlled tabular adjustment problem, 24th European Conference on Operational Research-EURO 2010, Session on Large-scale Mixed Optimization Problems, Universidade de Lisboa, Lisboa (Portugal), July 2010. Invited presentation.

67. J. Castro, J. Cuesta, Improving a class of PCG-based interior-point methods by quadratic regularizations, Joint SIMAI/SEMA Conference on Applied and Industrial Mathematics, Minisimposium of Numerical Solution of Large Linear Systems in Numerical Optimization, University of Cagliari, Cagliari (Italia), June 2010. Invited presentation.

68. J. Castro, Statistical disclosure control in tabular data, Research seminar, Department of Mathematics, Universitat de Lleida, Lleida (Catalonia), 1 June 2010. Invited presentation.

69. J. Castro, J.A. González, A package for $L_1$ controlled tabular adjustment. Joint UNECE/Eurostat Work Session on Statistical Data Confidentiality, Bilbao (Basque Country), December 2009. Invited presentation.

70. J. Castro, Advances on statistical disclosure control: tabular data protection of business data. IDESCAT seminar/technical session, IDESCAT, the National Statistical Institute of Catalonia, Barcelona, July 17 2009. Invited presentation.

71. J. Castro, J. Cuesta, Improving an interior-point algorithm for multicommodity flows by quadratic regularizations, International Network Optimization Conference 2009, Pisa, Italia, April 2009. Invited presentation.

72. J. Castro, A. Ouorou, An interior-point algorithm for routing in data telecommunications networks, International Network Optimization Conference 2009, Pisa, Italia, April 2009. Invited presentation.

73. J. Castro, J.A. González, Métodos heurísticos y exactos para el problema de ajuste controlado de tablas, XXXI Congreso Nacional de Estadística e Investigación Operativa, Murcia, Spain, February 2009.

74. J. Castro, J. Cuesta, Mejora de métodos iterativos en algoritmos de punto interior a través de regularizaciones cuadráticas, XXXI Congreso Nacional de Estadística e Investigación Operativa, Murcia, Spain, February 2009.

75. J. Castro, A stochastic programming approach to cash management in banking, Seminar of the Faculty of Mathematics, Universidad de Sevilla, Sevilla (Spain), November 18, 2008. Invited presentation.

76. J. Castro, Improving iterative solvers in IPMs for structured problems through quadratic regularizations, Research seminar of the Department of Statistics, Universidad Carlos III de Madrid, Getafe (Spain), October 3, 2008. Invited presentation.

77. J. Castro, D. Baena, Using a Mathematical Programming Modeling Language for Optimal CTA, Privacy in Statistical Databases 2008, Istanbul (Turkey), September 2008.

78. J. Castro, J. Cuesta, Improving iterative solvers in IPMs for structured problems through quadratic regularizations, International Conference on Applied Mathematical Programming and Modelling APMOD, Bratislava (Slovak Republic), May 2008. Invited presentation.

79. J. Castro, Iterative solvers in interior-point methods for structured problems, Research seminar of The Computer and Automation Research Institute , Hungarian Academy of Sciences, Budapest (Hungary), April 17 2008. Invited presentation.

80. J. Castro Interior point methods for LP, QP and convex problems: theory, implementation, and applications, First Intensive School on Mathematical Programming and Applications, CIEM Castro-Urdiales (Spain), January 30-31 2008. Invited course.

81. S. Giessing, A. Hundepool, J. Castro, Rounding methods for protecting EU-aggregates, Joint UNECE/Eurostat Work Session on Statistical Data Confidentiality, Manchester (United Kingdom), December 2007. Invited presentation.

82. J. Castro, A. Ouorou, An interior-point approach for convex routing problems in data telecommunication networks, Second Mathematical Programming Society International Conference on Continuous Optimization , McMaster University, Hamilton (Ontario, Canada), August 2007. Invited presentation.

83. J. Castro, J. Cuesta, Improving preconditioners in interior-point methods for optimization through quadratic regularizations, 2007 International Conference On Preconditioning Techniques For Large Sparse Matrix Problems In Scientific And Industrial Applications, Toulouse (France), July 2007.

84. J. Castro, Statistical tables and privacy, Summer School of the Universitat Rovira i Virgili,, Tarragona, June 2007. Invited presentation.

85. J. Castro, D. Baena, Automatic structure detection in constraints of tabular data, Privacy in Statistical Databases 2006, Roma (Italia), December 2006.

86. J. Cuesta, J. Castro, Quadratic regularizations in an interior-point method based on iterative solvers, Applied Mathematical Programming and Modelling APMOD 2006, Madrid (Spain), June 2006.

87. J. Castro, S. Giessing, Quality issues of minimum distance controlled tabular adjustment, European Conference on Quality in Survey Statistics, Cardiff (Wales, UK), April 2006.

88. J. Castro, S. Giessing, Testing variants of minimum distance controlled tabular adjustment, UNECE Work Session on Statistical Data Confidentiality, Geneva (Switzerland), November 2005. Invited presentation.

89. J. Castro, A fast network flows heuristic for cell suppression in positive tables, Privacy in Statistical Databases, Barcelona (Catalonia), June 2004.

90. J. Castro, Computational experiments with minimum-distance controlled perturbation methods, Privacy in Statistical Databases, Barcelona (Catalonia), June 2004.

91. J. Castro, Large-scale optimization in statistical tabular data protection, Computational Management Science Conference, Neuchatel (Switzerland), April 2004. Chairman and organizer of session: Optimization methods and applications.

92. J. Castro, A perturbation method for statistical data protection by interior-point algorithms, 27 Congreso Nacional de Estadística e Investigación Operativa, Lleida (Catalonia), April 2003.

93. J. Castro, Un algoritmo de punto interior para flujos multiartículo cuadráticos, 27 Congreso Nacional de Estadística e Investigación Operativa, Lleida (Catalonia), April 2003.

94. J. A. González, J. Castro, A multicommodity model for transport network planning and combined flows, 27 Congreso Nacional de Estadística e Investigación Operativa, Lleida (Catalonia), April 2003.

95. J. Castro, Quadratic interior-point methods in statistical disclosure control, International Workshop on Computational Management Science, Economics, Finance and Engineering , Limassol (Cyprus), March 2003. Invited presentation.

96. J. Castro, Network flows heuristics for complementary cell suppression: an empirical evaluation and extensions, Statistical Disclosure Control: from theory to practice, Eurostat, Luxembourg, December 2001. Invited presentation.

97. J. Castro, Solving quadratic multicommodity problems through an interior-point algorithm, 20th IFIP TC7 Conference on System Modelling and Optimization, Trier (Germany), July 2001.

98. J.A. González, J. Castro, A nonlinear optimization package for long-term hydrothermal coordination, EURO 2001 - European Operational Research Conference, Rotterdam (Netherlands), July 2001.

99. D. Rosas, J. Castro, L. Montero, Using ACCPM in the master problem of a restricted simplicial decomposition algorithm for the traffic assignment problem, TRISTAN IV - Triennial Symposium on Transportation Analysis, Azores Islands (Portugal), June 2001.

100. J. Castro, F.J. Heredia, Using modelling languages for the complementary cell suppression problem through network flows, 2nd Joint UNECE/EUROSTAT Work Session on Statistical Data Confidentiality , Skopje (Macedonia), March 2001.

101. J. Castro, Recent advances in the solution of the multicommodity flow problem, RIMO II Conference, Madrid (Spain), December 2000.

102. J. Castro, A. Frangioni, A parallel implementation of an interior-point algorithm for multicommodity network flows, 4th International Meeting on Vector and Parallel Processing VECPAR2000, Faculdade de Engenharia da Universidade do Porto, Porto (Portugal), June 2000.

103. J. Castro, Solving difficult multicommodity problems through a specialized interior-point algorithm, Applied Mathematical Programming and Modelling APMOD 2000, Brunel University, Uxbridge, London (England), April 2000. Invited presentation.

104. J. Castro, Computational experience with a parallel implementation of an interior-point algorithm for multicommodity flows, 19th IFIP TC7 Conference on System Modelling and Optimization, Cambridge (England), July 1999.

105. J. Castro, An interior-point algorithm for multicommodity network flows, CORS-INFORMS Meeting, Montréal (Canada), April 1998. Invited presentation.

106. J. Castro, Using the normal equations in a quadratic interior-point algorithm, Joint International Meeting EURO XV-INFORMS XXXIV, Barcelona (Catalonia), July 1997. Invited presentation.

107. J. Castro, A parallel implementation of a primal-dual interior-point algorithm for multicommodity network flows, Joint International Meeting EURO XV-INFORMS XXXIV, Barcelona (Catalonia), July 1997. Invited presentation.

108. J. Castro, Applying interior-point methods to the solution of the short-term hydrothermal coordination problem, 23 Congreso Nacional de Estadística e Investigación Operativa, Valencia (Spain), March 1997.

109. J. Castro, N. Nabona, Primal-dual interior-point method for multicommodity network flows with side constraints and comparison with alternative methods, 17th IFIP TC7 Conference on System Modelling and Optimization, Prague (Czech Republic), July 1995.

110. N. Nabona, J. Castro, J. A. González, Optimum long-term hydrothermal coordination with fuel limits, '94 IEEE Summer Meeting PWRS, San Francisco (U.S.), August 1994.

111. J. Castro, N. Nabona, Nonlinear multicommodity network flows through primal partitioning and comparison with alternative methods, 16th IFIP TC7 Conference on System Modelling and Optimization, Compiègne (France), June 1993.

112. N. Nabona, J. Castro, J. A. González, Long-term hydrothermal coordination of electricity generation with power and energy constraints, First European Conference on Numerical Methods and Engineering, Bruxelles (Belgique), September 1992.