Personal Data

Full name

Francisco Alexandre Saldanha da Gama Nunes da Conceição

Publishing name

Francisco Saldanha-da-Gama

Birthday

1968-10-07T00:00:00

Academic Degrees

DOUTORAMENTO(0)

Degree date

2002

Final grade

Aprovação com Louvor e Distinção

Degree granting institution

Universidade de Lisboa

School / College / Campus

Faculdade de Ciências

Thesis title

Modelos e Algoritmos para o Problema de Localização Dinâmica

Supervisor

Co-supervisor

Scientific area

Estatística e Investigação Operacional

MESTRADO(0)

Degree date

1904

Final grade

Muito bom

Degree granting institution

Universidade de Lisboa

School / College / Campus

Faculdade de Ciências

Thesis title

Um estudo sobre o problema de localização Dinâmica

Supervisor

Co-supervisor

Scientific area

Matemática Aplicada

LICENCIATURA(0)

Degree date

1991

Final grade

17 valores

Degree granting institution

Universidade de Lisboa

School / College / Campus

Faculdade de Ciências

Thesis title

Plano de sondagem de tráfego telefónico

Supervisor

Co-supervisor

Scientific area

-

Profissional activity

Period Position Institution
Out 90/ Jul 91 Estagiário Telefones de Lisboa e Porto
Ago. 91/ Set. 91 Técnico Superior Licenciado Telefones de Lisboa e Porto
Out. 93/ Jun 94 Assistente Estagiário Instituto Superior Técnico
Jun 94 / Jan 95 Assistente Instituto superior Técnico
Jan 95 / Jun 02 Assistente Faculdade de Ciências da Universidade de Lisboa
Jun 02 / Presente Professor auxiliar Faculdade de Ciências da Universidade de Lisboa

Area of scientific activity

Area of scientific activity

Estatística e Investigação Operacional

Specialization domain

Estatística e Investigação Operacional, Optimização Combinatória, Modelos de Localização multi-periódicos

Current main scientific area

Multi-period facility Location Problems
Supply Chain Netwqork Design
Stochatic Combinatorial Optimization problems
Project Scheduling

Other scientific activities

- Area Editor of Computers & Operations Research (January 2013 - )

- Vice-President of the Department of Statistics and Operations Research, Faculty of Science, University of Lisbon (September 2009-September 2012).

- Member of the Editorial Advisory Board of Computers & Operations Research November 2008-December 2012).

- Member of the Coordination Board of EWGLA - The EURO Working Group on Locational Analysis (November 2007-October 2011).

- Acted as a referee for 19 journals in the last 5 years.

- External referee for the Prize Ramiro Melendreras 2009, sponsored by SEIO, The Spanish Statistics and Operations Research Society.

Experience as scientific advisor

Supervision of PhD Thesis:

- Hans-Peter Ziegler. “Algorithms for linear stochastic programs and their application in supply chain network design problems”, KIT – Karlsruhe Institute of Technology, Germany, December 2011, co-supervised with Stefan Nickel (Karlsruhe Institute of Technology, Germany).

- Margarida Maria da Silva Carvalho. "Problemas multi-periódicos de phase-in/phase-out para localização de serviços com capacidade". University of Lisbon. In preparation.

- Bernardo Pedro Esteves Ferreira de Almeida. "Multi-skill resource-constrained project scheduling problems". University of Lisbon, In preparation.

Supervision of Master Thesis:

- Margaria Maria da Silva. “Métodos exactos para a resolução de um problema de phase-in/phase-out multi-periódico para localização de serviços com capacidade”. Concluída em Maio de 2005.

- Pedro Manuel da Silva Machado. “Estimação do valor óptimo em problemas de Job-shop scheduling”. Concluída em Abril de 2006.

- Leão José Fernandes. "Um modelo de planeamento preventivo, correctivo e de contingência em Sistemas de Informação - Aplicação a um parque de combustíveis". Concluída em Janeiro de 2008.

- Marta Sofia Teixeira Miranda, “Optimização da Produção em Obra” (in Portuguese), November 2011.

- Eliana Fabíola Correia Fernandes, “A heuristic approach for capacitated single allocation hub location problems”, October 2015.

- Ana Margarida Cordeiro de Sousa Wemans, "A Heuristic Approach for a Multi-Period Capacitated Single-Allocation Hub Location Problem", December 2016.

Participations in R&D projects

- DO-ILT: Optimizacion discreta para problemas integrados en logistica y transporte.” (MTM2015-63779-R), team project funded by Ministerio de Economía y Competitividad, Espanha. Principal Researcher: Elena Fernández (Technical University of Catalunya, Spain).

- Grant from the Portuguese Science Foundation for a Portuguese-German project in the years 2015 and 2016 (responsible researcher).

- Portuguese Science Foundation, project UID/MAT/04561/2013, Centro de Matemática, Aplicações Fundamentais e Investigação Operacional (2015- ).

- Thematic Network: Location and Related Problems (MTM2014-53828-REDT). Ministry of Economy and y Competitiveness. 2014–2016. Principal Researcher: Antonio Manuel Rodríguez-Chía (University of Cadiz, Spain).

- Thematic Network: Location and Related Problems (MTM2010-12053-E). Ministry of Economy and y Competitiveness. 2011–2013. Principal Researcher: Dolores Santos-Peñate (University of Gran-Canaria, Canary Islands, Spain).

- Project “OPTIMOS3: Modelos y métodos de Programación Matemática y sus aplicaciones”. (Mathematical Programming models and methods and their applications). Team grant from Spanish Ministerio de Educación y Ciencia. 1/2012–12/2015 (MTM2012-36163-C06-05). Main Researcher: Elena Fernández (Technical University of Catalunya, Spain).

- Project “OPTIMOS2: Modelos y métodos de Programación Matemática y sus aplicaciones”. (Mathematical Programming models and methods and their applications). Team grant from Spanish Ministerio de Educación y Ciencia. 1/2009–12/2012 (MTM2009-14039-C06-05). Main Researcher: Elena Fernández (Technical University of Catalunya, Spain). .

- Grant by the Council of the Portuguese Universities for a Portuguese-German project in the years 2009 and 2010 (Main Researcher).

- Portuguese Science Foundation, Sabbatical funding SFRH/BSAB/799/2008.

- POCTI – ISFL – 1 – 152 (team grant).

- Project PRAXIS/2/2.1/MAT/139/94 (team grant).

- Junta Nacional de Investigação Científica e Tecnológica (JNICT) – Portugal –10/1991-07/1993, individual grant as a M.Sc. student.

Awards

Year Award Awarding entity
2012 European Journal of Operational Research Top Cited Article 2007-2011 Elsevier Publisher
2012 Best European Journal of Operational Research review paper EURO - The European Federation of the Operational Research Societies
1995 Laureate in the XII EURO Summer Institute EURO - European Federation of the Operational Research Societies

Publications

Capítulos de livros

  • S. Nickel, F. Saldanha da Gama, "Multi-period facility location", in G. Laporte, S. Nickel, F. Saldanha da Gama (editors), "Location science", chapter 11, Springer, to appear.

    I. Correia, F. Saldanha da Gama, "Facility location under uncertainty" ", in G. Laporte, S. Nickel, F. Saldanha da Gama (editors), "Location science", chapter 8, Springer, to appear.

    G. Laporte, S. Nickel, F. Saldanha da Gama, "Introduction to Location Science", in G. Laporte, S. Nickel, F. Saldanha da Gama (editors), "Location Science", chapter 1, Springer, to appear.

    I. Correia, F. Saldanha da Gama, “A Modeling Framework for Project Staffing and Scheduling Problems”, Handbook of Project Management and Scheduling, chapter 31, Springer, to appear.

    M. T. Melo, S. Nickel, F. Saldanha da Gama, “Network Design Decisions in Supply Chain Planning” in Optimization of Logistics Systems – Models and Experiences, Symposium of the Collaborative Research Center 559 „Modelling of Large Logistics Networks“, P. Buchholz and A. Kuhn (editors), pages 1-19, Verlag Praxiswissen Dortmund 2008.

Livros (editor)

  • G. Laporte, S. Nickel, F. Saldanha da Gama (editors), “Location Science”, Springer, to appear.

    A. Paias, F. Saldanha da Gama (editors), “EURO Winter Institute on Location and Logistics, Collection of papers”, ISBN 978-989-20-0489-1, Operations Research Center, University of Lisbon, 2007.

Outras publicações

  • B. F. Almeida, I. Correia, F. Saldanha da Gama, "A biased random-key genetic algorithm for the multi-skill resource constrained project scheduling problem", preprint, Centro de Matemática, Aplicações fundamentais e Investigação Operacional, 2015. Available at http://cmafcio.campus.ciencias.ulisboa.pt/node/33.

    F. Dunke, I. Heckmann, S. Nickel, F. Saldanha da Gama, “Is optimal still good enough? Time traps in supply chains”, Technical Report 01/2016, FZI?Forschungszentrum Informatik, Karlsruhe Institute of Technology, Alemanha. Available at http://www.fzi.de/en/our-offer/mediacenter/publications/.

    B. F. Almeida, I. Correia, F. Saldanha da Gama, “An instance generator for the multi-Skill resource-constrained project scheduling problem”, preprint, Centro de Matemática, Aplicações fundamentais e Investigação Operacional, 2015, available at http://cmafcio.campus.ciencias.ulisboa.pt/node/33.

    Castro, J., S. Nasini, F. Saldanha da Gama, “A cutting-plane approach for large-scale capacitated multi-period facility location using a specialized interior-point method”, Research Report UPC-DEIO, June 2015, available at http://www-eio.upc.es/~jcastro.

    Correia, I., S. Gelareh, S. Nickel, F. Saldanha-da-Gama, “Multi-period hub location problems in transportation networks”, Working paper 9/2012, Centro de Investigação Operacional da Universidade de Lisboa, 2012. Available at http://cio.fc.ul.pt/files/09.2012.pdf.

    I. Correia, M. T. Melo and F. Saldanha da Gama, “Comparing classical performance measures for a multi-period, two-echelon supply chain network design problem with sizing decisions”, Technical reports on Logistics of the Saarland Business School, Nr 1 (2012).

    M. T. Melo, S. Nickel, F. Saldanha da Gama, “Redesigning multi-echelon supply chain networks”, Working paper nº 05/2010, Centro de Investigação Operacional, Fundação da Faculdade de Ciências da Universidade de Lisboa, 2009. Available at http://cio.fc.ul.pt/files/05.2010.pdf.

    S. Nickel, F. Saldanha da Gama, H.-P. Ziegler, “Stochastic Programming approaches for risk aware supply chain network design problems”, Technical Report 181, ITWM - Fraunhofer Institute for Industrial Mathematics, Kaiserslautern, Germany, 2010. Available at http://www.itwm.fraunhofer.de/zentral/download/berichte/bericht_181.pdf.

    J. A. S. Gromicho, J. J. van Hoorn, F. Saldanha da Gama, G. Timmer, “Exponentially better than brute force: solving the Job-shop scheduling problem optimally by dynamic programming”, Working paper nº 12/2009, Centro de Investigação Operacional, Fundação da Faculdade de Ciências da Universidade de Lisboa, 2009. Available at http://cio.fc.ul.pt/files/12.2009.pdf.

    I. Correia, S. Nickel, F. Saldanha da Gama, “Single-allocation hub location problems with capacity choices”, Working paper nº 17/2008, Centro de Investigação Operacional, Fundação da Faculdade de Ciências da Universidade de Lisboa, 2009. Available at http://cio.fc.ul.pt/files/9.2009.pdf.

    M. T. Melo, S. Nickel, F. Saldanha da Gama, “An LP-rounding heuristic to solve a multi-period facility relocation problem”, Technical Report 168, ITWM - Fraunhofer Institute for Industrial Mathematics, Kaiserslautern, Alemanha, 2008. Disponível em
    http://www.itwm.fraunhofer.de/zentral/download/berichte/bericht_168.pdf.

    I. Correia, S. Nickel, F. Saldanha da Gama, “The capacitated single-allocation hub location problem revisited: A note on a classical formulation”, Technical Report 164, ITWM - Fraunhofer Institute for Industrial Mathematics, Kaiserslautern, Germany, 2008. Available at http://www.itwm.fraunhofer.de/zentral/download/berichte/bericht164.pdf.

    I. Correia, L. Lampreia-Lourenço, F. Saldanha da Gama, “Multi-skill resource constrained project scheduling: Formulation and inequalities”, Working paper nº 17/2008, Centro de Investigação Operacional, Fundação da Faculdade de Ciências da Universidade de Lisboa, 2008. Available at http://cio.fc.ul.pt/files/17.2008.pdf.

    M. T. Melo, S. Nickel, F. Saldanha da Gama, “Network design decisions in supply chain planning”, Technical Report 140, ITWM - Fraunhofer Institute for Industrial Mathematics, Kaiserslautern, Germany, 2008. Available at
    http://www.itwm.fraunhofer.de zentral/download/ berichte/bericht140.pdf.

    I. Correia, L. Gouveia, F. Saldanha da Gama, “Discretized formulations for capacitated location problems with modular distribution costs”, working paper 7/2007, Centro de Investigação Operacional da Universidade de Lisboa, 2007 (available at http://cio.fc.ul.pt/files/7.2007.pdf).

    M.T. Melo, S. Nickel, and F. Saldanha da Gama, "Facility location and supply chain management: A comprehensive review". Technical Report 130, Fraunhofer Institute
    for Industrial Mathematics (ITWM), Kaiserslautern, Germany, 2007 (Available at
    www.itwm.fhg.de/zentral/download/berichte/bericht130.pdf).

    I. Correia, L. Gouveia, F. Saldanha da Gama, "Discretized formulations for capacitated location problems with modular distribution costs", Working paper nº 7/2007, Centro de Investigação Operacional, Fundação da Faculdade de Ciências da Universidade de Lisboa (available at http://cio.fc.ul.pt/files/7.2007.pdf).

    I. Correia, L. Gouveia, F. Saldanha da Gama, "Solving the variable size bin packing problem with discretized formulations", Working paper nº 5/2006, Centro de Investigação Operacional, Fundação da Faculdade de Ciências da Universidade de Lisboa (available at http://cio.fc.ul.pt/files/5.2006.pdf).

    M.T. Melo, F. Saldanha da Gama, M.M. Silva, "A primal decomposition scheme for a dynamic capacitated phase-in/phase-out location problem", Working paper nº 9/2005, Centro de Investigação Operacional, Fundação da Faculdade de Ciências da Universidade de Lisboa, 2005 (available at http://cio.fc.ul.pt/files/9.2005.pdf).

    L. Gouveia, F. Saldanha da Gama, "On the capacitated concentrator location problem: A reformulation by discretization", Working paper nº 2/2004, Centro de Investigação Operacional, Fundação da Faculdade de Ciências da Universidade de Lisboa (disponível em http://cio.fc.ul.pt/files/2.2004.pdf).

    M.T. Melo, S. Nickel, F. Saldanha da Gama, "Large-scale models for dynamic multi-commodity capacitated facility location" Technical Report 58, ITWM - Fraunhofer Institut Techno-und Wirtschaftsmathematik, Kaiserslautern, Germany, 2003 (available at http://www.itwm.fraunhofer.de /./zentral/download/berichte/bericht58.pdf).

    F. Saldanha da Gama, M.E. Captivo, "A Note on ´A Dual-Based Procedure for Dynamic Facility Location´", Working paper nº 11/1996, Centro de Investigação Operacional, Fundação da Faculdade de Ciências da Universidade de Lisboa;

    F. Saldanha da Gama, M. E. Captivo, ‘New approaches for the Discrite Dynamic Location Problem’, Working paper nº 10/1996, Centro de Investigação Operacional, Fundação da Faculdade de Ciências da Universidade de Lisboa, 1996;

    F. Saldanha da Gama, M.E. Captivo, "A Study about Dynamic Location Problems", Working paper nº 1/1995, Centro de Investigação Operacional, Fundação da Faculdade de Ciências da Universidade de Lisboa;

Publicações em actas de encontros científicos

  • I. Correia, T. Melo, F. Saldanha-da-Gama, “A two-echelon facility location problem with layout selection”, 14th International Conference on Mathematical Methods, Computational Techniques and Intelligent Systems - MACMECTIS'12, pp 79-84, 2012.

    I. Correia, S. Nickel, F. Saldanha da Gama, “Single-allocation hub location problems with capacity decisions and balancing requirements”, 12th International Conference on Mathematical and Computational Methods in Science and Engineering - MACMESE-06, pp 51-56, 2010.

    I. Correia, L. Gouveia, F. Saldanha da Gama, “Discretized reformulations for a capacitated network loading problem arising in a facility location context”, INOC Proceedings 2007 - International Network Optimization Conference, Pisa, Italy, 26-29 April, 2009.

    I. Correia, L. Gouveia, F. Saldanha da Gama, “On Capacitated Location Problems with Modular Links and General Distributions Costs”, INOC 2007 Proceedings (International Network Optimization Conference, Spa, Belgium, 22-25 April 2007).

    F. Saldanha da Gama, M. Silva, "A decomposition scheme for a multi-period phase-in/phase-out location problem", INOC 2005 Proceedings (International Network Optimization Conference, Lisbon, 20-23 March 2005).

    Melo, M. T., S. Nickel e F. Saldanha da Gama (2004), ‘Dynamic multi-commodity facility location: a mathematical modeling framework for strategic supply chain planning’, in Operations Research Proceedings 2003 – Selected papers of the international conference on Operations research (OR2003), Heidelberg, September 2003;

Artigos em revistas de circulação internacional com arbitragem científica

  • S. Alumur, S. Nickel, B. Rohrbeck, F. Saldanha-da-Gama, “Modeling congestion and service time in hub location problems”, Applied Mathematical modelling 55, 13–32, 2018.

    I. Correia, S. Nickel, F. Saldanha-da-Gama, “A stochastic multi-period capacitated multiple allocation hub location problem: formulation and inequalities”, Omega 74, 122–134, 2018.

    F. Dunke, S. Nickel, I. Heckmann, F. Saldanha-da-Gama, “Time Traps in Supply Chains: is Optimal Still Good Enough?”, European Journal of Operational Research 264, 813–829, 2018.

    M. Albareda-Sambola, E. Fernández, F. Saldanha-da-Gama, “Heuristic solutions to the Facility Location Problem with General Bernoulli Demands”, INFORMS Journal on Computing 29, 737–753, 2017.

    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, 411–444, 2017.

    S. A. Alumur, S. Nickel, F. Saldanha-da-Gama, Y. Seçerdin, "Multi-period hub network design problems with modular capacities", Annals of Operations Research Annals of Operations Research 246, 289–312, 2016.

    B. F. Almeida, I. Correia, F. Saldanha-da-Gama, “Priority-Based Heuristics for the Multi-Skill Resource Constrained Project Scheduling Problem”, Expert Systems with Applications 57, 91–103, 2016.

    S. Nickel, M. Reuter-Oppermann, F. Saldanha da Gama, “Ambulance Location under Stochastic Demand: A Sampling Approach”, Operations Research for Health Care 8, 24–32, 2016.

    I. Correia, F. Saldanha da Gama, "A note on ‘Branch-and-price approach for the multi-skill project scheduling problem’", Optimization Letters 9, 1255–1258, 2015.

    I. Correia, F. Saldanha da Gama, "The impact of fixed and variable costs in a multi-skill project scheduling problem: an empirical study", Computers & Industrial Engineering 72, 230–238, 2014.

    Y. Hinojosa, J. Puerto, F. Saldanha da Gama, “A two-stage stochastic transportation problem with fixed handling costs and a priori selection of the distribution channels”, TOP 22, 1123–1147, 2014..

    I. Correia, S. Nickel, F. Saldanha da Gama, “Multi-product capacitated single-allocation hub location problems: Formulations and inequalities”, Networks and Spatial Economics 14, 1–25, 2014.

    I. Correia, M. T. Melo, F. Saldanha da Gama, “Comparing classical performance measures for a multi-period, two-echelon supply chain network design problem with sizing decisions”, Computers & Industrial Engineering 64, 366–380, 2013.

    M. T. Melo, S. Nickel, F. Saldanha da Gama, “An efficient heuristic approach for a multi-period logistics network redesign problem”, TOP 22, 80–108, 2014.

    J. A. S. Gromicho, J. J. van Hoorn, F. Saldanha-da-Gama, G. Timmer, “Solving the job-shop scheduling problem optimally by dynamic programming”, Computers and Operations Research, 39, 2968–2977, 2012.

    I. Correia, L. Lampreia-Lourenço, F. Saldanha da Gama, “Project scheduling with flexible resources: formulation and inequalities”, OR Spectrum, 34, 635-663, 2012.

    S. A. Alumur, S. Nickel, F. Saldanha da Gama, V. Verter, “Multi-Period Reverse Logistics Network Design”, European Journal of Operational Research, 220, 67-78, 2012.

    S. A. Alumur, S. Nickel, F. Saldanha da Gama, “Hub location under uncertainty”, Transportation Research Part B 46, 218-230, 2012.

    S. Nickel, F. Saldanha da Gama, H.-P. Ziegler, “A multi-stage stochastic supply chain network design problem with financial decisions and risk management”, Omega 40, 511-524, 2012.

    M. T. Melo, S. Nickel, F. Saldanha da Gama, “A tabu search heuristic for redesigning a multi-echelon supply chain network over a planning horizon”, International Journal of Production Economics 136, 218-230, 2012.

    I. Correia, S. Nickel, F. Saldanha da Gama, “Hub and spoke network design with single-assignment, capacity decisions and balancing requirements”, Applied Mathematical Modelling 35, 4841–4851, 2011.

    M. Albareda-Sambola, E. Fernández, F. Saldanha da Gama, “The facility location problem with Bernoulli demands”, Omega 39, 335-345, 2011.

    I. Correia, S. Nickel, F. Saldanha da Gama, “The capacitated single-allocation hub location problem revisited: A note on a classical formulation”, European Journal of Operational research 207, 92–96, 2010.

    I. Correia, S. Nickel, F. Saldanha da Gama, “Single-assignment hub location problems with multiple capacity levels”, Transportation Research Part B: Methodological 44, 1047–1066, 2010.

    I. Correia, L. Gouveia, F. Saldanha da Gama, “Discretized formulations for capacitated location problems with modular distribution costs”, European Journal of Operational Research 204, 237-244, 2010.

    M. C. Fonseca, Álvaro García-Sánchez, Miguel Ortega-Mier, F. Saldanha da Gama, ‘A Stochastic Bi-objective Location Model for Strategic Reverse Logistics’, TOP, 18, 158–184, 2010.

    S. Nickel, F. Saldanha da Gama, “Logistics Network Design”, OR Spectrum 31, 461-463, 2009.

    M. T. Melo, S. Nickel, F. Saldanha da Gama, “Facility location and supply chain management – A review”, European Journal of Operational Research 196, 401-412, 2009 (Invited review).

    I. Correia, L. Gouveia, F. Saldanha da Gama, "Solving the variable size bin packing problem with discretized formulations", Computers & Operations Research 35 (2008), 2103-2113.

    L. Gouveia, F. Saldanha da Gama, "On the capacitated concentrator location probem: a reformulation by discretization", Computers & Operations Research 33 (2006), 1242-1258.

    M.T. Melo, S. Nickel, F. Saldanha da Gama, "Dynamic multi-commodity capacitated facility location: a mathematical modelling framework for strategic supply chain planning", Computers & Operations Research 33 (2006), 181-208.

    F. Saldanha da Gama, M.E. Captivo (1998), "A heuristic approach for the discrete dynamic location problem", Location Science 6, 211-223.

    P. Avella, S. Benati, L. Cánovas Martinez, K. Dalby, D. Di Girolamo, B. Dimitrijevic, I. Giannikos, N. Guttman, T.H. Hultberg, J. Fliege, M. Munõz Márquez, M.M. Ndiaye, S. Nickel, P. Peeters, D. Pérez Brito, S. Policastro, F. Saldanha da Gama, P. Zidda, "Some personal views on the current state and the future of Locational Analysis", European Journal of Operational Research 104 (1998), 269-287.

Teses

  • "Um Estudo Sobre o Problema de Localização Dinâmica", Master Thesis. Faculty of Science, University of Lisbon (1994);<br> <br>"Modelos e Algoritmos para o problema de localização dinâmica", PhD Thesis. Faculty of Science, University of Lisbon (2002);<br><br>

Communications

Comunicações orais por convite

"Facility location with Bernoulli demands: optimization models and solution procedures”, Xi’an Jiaotong University, Xi’an, China, October 13, 2017.

“Facility location with Bernoulli demands: optimization models and solution procedures”, University of the Chinese Academy of Sciences, Beijing, China, October 12, 2017.

“Facility location with Bernoulli demands: optimization models and solution procedures”, Wuzi University, Beijing, China, October 12, 2017.

“Facility location with Bernoulli demands: optimization models and solution procedures”, Beijing Union University, Beijing, China, October 11, 2017.

“Facility location with Bernoulli demands: optimization models and solution procedures”, Beijing Jiaotong University, Beijing, China, October 9, 2017.

“Facility location with Bernoulli demands: optimization models and solution procedures”, University of Vienna, Vienna, Austria, October 2, 2017.

“Service location for unit demand customers: dealing with uncertainty”, Seminar presented at Nanzan University, Nagoya, Japan, December 8, 2016.

“A multi-stage stochastic supply network design problem with financial decisions and risk management: modeling aspects and an exact algorithm”, Seminar presented at Université Libre de Bruxelles, Belgium, April 21, 2015.

“Project Scheduling with Flexible Resources: Formulation and Inequalities”, Seminar presented at the Polytechnic University of Catalonia, Barcelona, Spain, December 17, 2010.

“A hub location and dimensioning problem”, Seminar presented at the Faculty of Mathematics, University of Seville, April 15, 2010.

“Project scheduling with flexible resources: Formulation and inequalities”, Seminar presented at Institute for Operations Research, University of Karlsruhe, Germany, May 14, 2009.

“A capacitated facility location problem with Bernoulli demands”, Seminar presented at the Faculty of Mathematics the Department of Probability and Applied Statistics, University of Rome La Sapienza, Italy, April 22, 2009.

"Discretized reformulations for multi-period concentrator location problems", One of the 3 invited talks for the 'Seminario Optimizaci´on de Recursos', Organized by Alfredo Marín, Department of Statistics and Operational Research, University of Murcia, Spain, 3-4 March 2008.

"Reformulating location models by discretization", Seminar presented at the Tinbergen Institute em Amesterdam, Holland, November 2006.

"Multiperiod discrete location: models and algorithms", Seminar presented at the Fraunhofer Institut Techno- und Wirtschaftsmathematik (ITWM), Kaiserslautern, em Outubro de 2001;

Outras comunicações orais

J. Peiró, Á. Corberán, R. Martí, F. Saldanha da Gama, "Heuristic solutions for a class of stochastic uncapacitated p-hub median problems", INFORMS 2017, Annual meeting of the Institute for the Operations Research and Management Science, Houston, Texas, USA, 22-25 October, 2017.

M. Albareda-Sambola, E. Fernández, F. Saldanha da Gama, "Service location for unit-demand customers: dealing with uncertainty", Optimization’2017, Lisbon, Portugal, 6-8 September, 2017.

Á. Corberán, R. Martí, J. Peiró, F. Saldanha da Gama, "A heuristic algorithm for r-allocation p-hub median problems", IFORS XXI, 21th Conference of the International Federation of the Operations Research Societies, Quebec City, Quebec, Canada, 17-21 July, 2017.

Á. Corberán, R. Martí, J. Peiró, F. Saldanha da Gama, "A heuristic algorithm for the stochastic uncapacitated r-allocation p-hub median problem", ISOLDE XIV, 14th International Symposium on Locational Decisions, Toronto e Huntsville, Canadá, 9-14 julho, 2017.

Á. Corberán, R. Martí, J. Peiró, F. Saldanha da Gama, "Stochastic uncapacitated r-allocation p-hub median problems: modeling framework and heuristic solutions", INOC'2017, International Network Optimization Conference, Lisbon, Portugal, 26-28 February, 2017.

F. Saldanha da Gama, A. Wemans, "Kernel search for a multi-period single-allocation hub location problem with modular capacities", INOC'2017, International Network Optimization Conference, Lisbon, Portugal, 26-28 February, 2017 (presented by A. Wemans).

I. Correia, S. Nickel, F. Saldanha da Gama, “An enhanced MILP model for stochastic multi-period multiple allocation hub location”, INFORMS 2016, Annual meeting of the Institute for the Operations Research and Management Science, Nashville, Tennessee, USA, 13-16 November, 2016.

S. Alumur, S. Nickel, B. Rohrbeck, F. Saldanha da Gama, “Modeling congestion and service time in hub location problems”, INFORMS 2016, Annual meeting of the Institute for the Operations Research and Management Science, Nashville, Tennessee, USA, 13-16 November, 2016 (presented by S. Nickel).

I. Heckmann, S. Nickel, F. Saldanha da Gama, " Supply Chain Design with Risk Consideration: CPLP-Risk", EWGLA XXIII, 23rd Meeting of the EURO Working Group in Locational Analysis, Malaga, Spain, 14-16 September, 2016 (presented by S. Nickel).

Ö. B. Kinay, B. Y. Kara, F. Saldanha-da-Gama, I. Correia, “A bi-objective decision making framework for the shelter site location problem with stochastic demand”, EWGLA XXIII, 23rd Meeting of the EURO Working Group in Locational Analysis, Malaga, Spain, 14-16 September, 2016 (presented by Ö. B. Kinay).

S. Alumur, S. Nickel, B. Rohrbeck, F. Saldanha da Gama, “Heuristics for hub location problems with congestion and service time”, EWGLA XXIII, 23rd Meeting of the EURO Working Group in Locational Analysis, Malaga, Spain, 14-16 September, 2016 (presented by B. Rohrbeck).

M. Reuter-Oppermann, S. Nickel, F. Saldanha da Gama, “Locating ambulances and their bases using stochastic programming”, EWGLA XXIII, 23rd Meeting of the EURO Working Group in Locational Analysis, Malaga, Spain, 14-16 September, 2016 (presented by M. Reuter-Oppermann).

Á. Corberán, R. Martí, J. Perió, F. Saldanha da Gama, “Heuristic solutions for the stochastic r-allocation p-hub median problem with non-stop services”, EWGLA XXIII, 23rd Meeting of the EURO Working Group in Locational Analysis, Malaga, Spain, 14-16 September, 2016 (presented by J. Peiró).

I. Heckmann, S. Nickel, F. Saldanha da Gama, “The Risk-Aware Multi-Period Capacitated Plant Location Problem (CPLP-Risk)”, EURO XXVII, 28th European Conference in Operational Research, Poznan, Poland, 3-6 July, 2016 (presented by I. Heckmann).

I. Correia, S. Nickel, F. Saldanha da Gama, “A Modeling Framework for Stochastic Multi-Period Capacitated Multiple Allocation Hub Location”, ILS 2016–Information Systems Logistics and Supply Chain, 6th International Conference, Talence, Bordeaux, France, 1-4 June, 2016.

I. Heckmann, S. Nickel, F. Saldanha da Gama, “The Risk Aware Multi-Period Capacitated Plant Locatoin Problem”, ILS 2016–Information Systems Logistics and Supply Chain, 6th International Conference, Talence, Bordeaux, France, 1-4 June, 2016 (presented by S. Nickel).

S. Alumur, S. Nickel, B. Rohrbeck, F. Saldanha da Gama, "Modelling Congestion and Service-Time in Hub Location Problems", 58th CORS Annual Conference, Banff, Alberta, Canada, 30 May 1 - June 1, 2016 (presented by S. Alumur).

J. Castro, S. Nasini, F. Saldanha-da-Gama, “Using an interior-point method for huge capacitated multiperiod facility location”, International Workshop on Locational Analysis and related problems, Barcelona, Spain, 25-27 November, 2015 (presented by J. Castro).

M. Albareda-Sambola, E. Fernández, F. Saldanha-da-Gama, “Heuristic approaches for the facility location problem with Bernoulli demands”, CORAL 2015, V Combinatorial Optimization, Routing and Location Meeting, Salamanca, Spain, September 30 - October 2, 2015.

I. Correia, S. Nickel, F. Saldanha da Gama, “Um problema multi-periódico estocástico de localização de hubs modulares” (in Portuguese), IO 2015, 17º Congresso da Associação Portuguesa de Investigação Operacional (APDIO), Portalegre, Portugal, 7-9 September 2015 (presented by I. Correia).

I. Correia, S. Nickel, F. Saldanha da Gama, “A multi-period stochastic hub location problem: formulation and valid inequalities”, EURO XXVII, 27th European Conference in Operational Research, Glasgow, Scotland, UK, 12-15 July, 2015.

M. Albareda-Sambola, E. Fernández, F. Saldanha-da-Gama, “Solutions to the facility location problem with general Bernoulli demands”, EWGLA XXII, 22nd Meeting of the EURO Working Group in Locational Analysis, Budapest, Hungary, 20-22 May, 2015 (presented by M. Albareda-Sambola).

S. Alumur, S. Nickel, B. Rohrbeck, F. Saldanha da Gama, “Different allocation models for hub location problems with congestion”, EWGLA XXII, 22nd Meeting of the EURO Working Group in Locational Analysis, Budapest, Hungary, 20-22 May, 2015 (presented by B. Rohrbeck).

S. Alumur, S. Nickel, F. Saldanha da Gama, Y. Seçerdin, “Multi-period hub network design problems with modular capacities”, EWGLA XXII, 22nd Meeting of the EURO Working Group in Locational Analysis, Budapest, Hungary, 20-22 May, 2015.

I. Correia, B. Y. Kara, Ö. B. Kinay, F. Saldanha da Gama, “Hedging uncertainty in the shelter site location problem” , EWGLA XXII, 22nd Meeting of the EURO Working Group in Locational Analysis, Budapest, Hungary, 20-22 May, 2015 (presented by Ö. B. Kinay).

I. Correia, F. Saldanha da Gama, "The impact of fixed and variable costs in multi-skill project scheduling problem", Optimization'2014, Guimarães, Portugal, 28-30 July, 2014.

I. Correia, S. Nickel, F. Saldanha da Gama, "Capacitated single-allocation hub location problems with different types of products", Optimization'2014, Guimarães, Portugal, 28-30 July, 2014.

S. Alumur, S. Nickel, F. Saldanha da Gama, Y. Seçerdin, “Multi-period hub network design problems with modular capacities”, IFORS XX – 20th Conference of the International Federation of the Operations Research Societies, Barcelona, Spain, 13-18 July, 2014 (presented by M. Reuter).

Y. Hinojosa, J. Puerto, F. Saldanha da Gama, “A two-stage stochastic transportation problem with fixed handling costs and a priori selection of the distribution channels”, IFORS XX – 20th Conference of the International Federation of the Operations Research Societies, Barcelona, Spain, 13-18 July, 2014 (presented by Y. Hinojosa).

M. Reuter, S. Nickel, F. Saldanha da Gama, “Ambulance planning under uncertain demand”, IFORS XX – 20th Conference of the International Federation of the Operations Research Societies, Barcelona, Spain, 13-18 July, 2014 (presented by M. Reuter).

I. Heckmann, S. Nickel, F. Saldanha da Gama, “New risk concepts for supply chain design models”, ISOLDE XIII – International Symposium on Locational Decisions, Naples and Capri, Italy, 16-20 June, 2014 (presented by I. Heckmann).

I. Correia, S. Nickel, F. Saldanha da Gama, “Multi-product capacitated single-allocation hub location problems”, ISOLDE XIII – International Symposium on Locational Decisions, Naples and Capri, Italy, 16-20 June, 2014 (presented by S. Nickel).

S. Alumur, S. Nickel, F. Saldanha da Gama, Y. Seçerdin, “Multi-period hub network design problems with modular capacities”, ISOLDE XIII – International Symposium on Locational Decisions, Naples and Capri, Italy, 16-20 June, 2014.

S. Alumur, S. Nickel, B. Rohrbeck, F. Saldanha da Gama, “Hub location with time-definite delivery under congestion”, ISOLDE XIII – International Symposium on Locational Decisions, Naples and Capri, Italy, 16-20 June, 2014 (presented by B. Rohrbeck).

I. Correia, F. Saldanha-da-Gama, “A Cost Minimization Multi-skilled Resource Constrained Project Scheduling Problem”, EURO XXVI - 26th European Conference in Operational Research, Rome, Italy, 1-4 July, 2013 (presented by I. Correia).

S. A. Alumur, S. Nickel, F. Saldanha-da-Gama, Y. Seçerdin, “Multi-Period Hub Location and Hub Network Design Problems with Modular Hub Capacities”, EURO XXVI – 26th European Conference in Operational Research, Rome, Italy, 1-4 July, 2013 (presented by Y. Seçerdin).

S. A. Alumur, S. Nickel, F. Saldanha-da-Gama, “A robust-stochastic model for hub location under uncertainty”, International Workshop on Locational Analysis and related problems, Torremolinos, Spain, 19-21 April, 2013.

I. Correia, S. Nickel, F. Saldanha-da-Gama, “Multiproduct capacitated single allocation hub location problems: formulations and inequalities”, International Workshop on Locational Analysis and related problems, Torremolinos, Spain, 19-21 April, 2013 (presented by S. Nickel).

S. A. Alumur, S. Nickel, F. Saldanha-da-Gama, V. Verter, “Multi-period reverse logistics network design”, INOC’2013 – International Network Optimization Conference, Tenerife, Spain, 20-22 May, 2013 (presented by S. Alumur).

S. A. Alumur, S. Nickel, F. Saldanha-da-Gama, “Hub location under uncertainty”, EWGLA XX - 20th Meeting of the EURO Working Group in Locational Analysis, Ankara, Turkey, 17-19 April, 2013.

S. A. Alumur, S. Nickel, F. Saldanha-da-Gama, V. Verter, “Multi-period reverse logistics network design”, EWGLA XX - 20th Meeting of the EURO Working Group in Locational Analysis, Ankara, Turkey, 17-19 April, 2013 (presented by S. Nickel).

M. Albareda-Sambola, E. Fernández, F. Saldanha-da-Gama, “Facility location with Bernoulli demands and facility outsourcing”, EWGLA XX - 20th Meeting of the EURO Working Group in Locational Analysis, Ankara, Turkey, 17-19 April, 2013 (presented by M. Albareda-Sambola).

S. A. Alumur, S. Nickel, F. Saldanha-da-Gama, Y. Seçerdin, “Multi-period hub location and hub network design problems with modular hub capacities”, EWGLA XX - 20th Meeting of the EURO Working Group in Locational Analysis, Ankara, Turkey, 17-19 April, 2013 (presented by Y. Seçerdin).

S. Nickel, F. Saldanha da Gama, H.-P. Ziegler, “A multi-stage stochastic supply network design problem with financial decisions and risk management”, ISOLDE XII – International Symposium on Locational Decisions, Nogoya and Kyoto, Japan, 19-24 July, 2012 (Presented by S. Nickel).

S. Alumur, S. Nickel, F. Saldanha da Gama, “Multi-period reverse logistics network design”, ISOLDE XII – International Symposium on Locational Decisions, Nogoya and Kyoto, Japan, 19-24 July, 2012 (presented by S. Alumur).

S. Alumur, S. Nickel, F. Saldanha da Gama, “Hub location under uncertainty”, ISOLDE XII – International Symposium on Locational Decisions, Nogoya and Kyoto, Japan, 19-24 July, 2012.

S. Alumur, S. Nickel, F. Saldanha da Gama, “Hub location under uncertainty”, EURO XXV – 25th European Conference in Operational Research, Vilnius, Lithuania, 8-11 July, 2012.

I. Correia, S. Nickel, F. Saldanha da Gama, “Hub and spoke network design with single-assignment, capacity decisions and balancing requirements”, EURO XXV – 25th European Conference in Operational Research, Vilnius, Lithuania, 8-11 July, 2012 (presented by S. Nickel).

S. Alumur, S. Nickel, F. Saldanha da Gama, “Multi-period reverse logistics network design”, EURO XXV – 25th European Conference in Operational Research, Vilnius, Lithuania, 8-11 July, 2012 (presented by S. Alumur).

I. Correia, M. T. Melo, F. Saldanha da Gama, “Comparing classical performance measures for a multi-period logistics network design problems”, EURO XXV – 25th European Conference in Operational Research, Vilnius, Lithuania, 8-11 July, 2012 (presented by M. T. Melo).

I. Correia, S. Nickel, F. Saldanha da Gama, “Hub location with multiple products: Formulations and inequalities”, CORAL 2012 - IV Combinatorial Optimization, Routing and Location Meeting, Benicassim, Spain, 3-4 May, 2012.

S. Nickel, F. Saldanha da Gama, H.-P. Ziegler, “A multi-stage stochastic supply network design problem with financial decisions and risk management”, CORAL 2012 - IV Combinatorial Optimization, Routing and Location Meeting, Benicassim, Spain, 3-4 May, 2012 (presented by Stefan Nickel).

I. Correia, S. Nickel, F. Saldanha da Gama, “Hub and Spoke Network Design with Single-assignment, Capacity Decisions and balancing Requirements”, INFORMS 2011, Charlotte, North Carolina, USA, 13-16 November 2011 (presented by S. Nickel).

M. T. Melo, I. Correia, F. Saldanha da Gama, “Design of multi-period two-echelon logistics networks including facility sizing decisions”, EWGLA XIX - 19th Meeting of the EURO Working Group in Locational Analysis, Nantes, France, 12-14 October, 2011 (presented by M. T. Melo).

I. Correia, S. Nickel, F. Saldanha da Gama, “Multi-product capacitated single allocation hub location problems: formulation and inequalities”, EWGLA XIX - 19th Meeting of the EURO Working Group in Locational Analysis, Nantes, France, 12-14 October, 2011 (presented by I. Correia).

M. Albareda-Sambola, E. Fernández, F. Saldanha da Gama, “Facility location with heterogeneous Bernoulli demands and facility outsourcing”, EWGLA XIX - 19th Meeting of the EURO Working Group in Locational Analysis, Nantes, France, 12-14 October, 2011 (presented by M. Albareda-Sambola).

M. T. Melo, I. Correia, F. Saldanha da Gama, “A multi-period two-level network design problem with facility sizing decisions”, GOR 2011, Annual meeting of the German Operations Research Society, Zurich, Switzerland, 30 August - 2 September, 2011 (presented by M. T. Melo).

I. Correia, S. Nickel, F. Saldanha da Gama, “Hub location problems with multiple flow categories”, Optimization’2011, Caparica, Portugal, 24-27 July, 2011.

I. Correia, L. Lampreia-Lourenço, F. Saldanha da Gama, “Formulation and inequalities for a multi-skill project scheduling problem”, Optimization’2011, Caparica, Portugal, 24-27 July, 2011 (presented by L. Lampreia-Lourenço).

I. Correia, S. Nickel, F. Saldanha da Gama, “Hub location problems with multiple flow categories”, IFORS XIX – 19th Conference of the International Federation of the Operations Research Societies, Melbourne, Australia, 11-15 July, 2011.

I. Correia, S. Nickel, F. Saldanha da Gama, “Single-allocation hub location problems with capacity decisions and balancing requirements”, The 12th WSEAS International Conference on Mathematical and Computational Methods in Science and Engineering, Faro, Portugal, 3-5 November, 2010 (presented by I. Correia).

S. Nickel, F. Saldanha da Gama, H.-P. Ziegler, “Stochastic Programming approaches for Risk-aware Supply Chain Network Design Problems”, SP XII - 12th International Conference on Stochastic Programming, Halifax, Nova Scotia, Canada, 14-20 Agosto, 2010 (presented by H.-P. Ziegler).

I. Correia, S. Nickel, F. Saldanha da Gama, “Models for a single-assignment hub location problem with capacity levels”, EURO XXIV – 24th European Conference in Operational Research, Lisboa, Portugal, 11-14 Julho, 2010 (presented by I. Correia).

I. Correia, M. T. Melo, F. Saldanha da Gama, “A two-echelon supply chain network design problem with facility sizing decisions and variable operating costs”, EURO XXIV – 24th European Conference in Operational Research, Lisboa, Portugal, 11-14 Julho, 2010.

I. Correia, S. Nickel, F. Saldanha da Gama, “A single-allocation hub location problem with capacity choices”, TRISTAN VII - Seventh Triennial Symposium on Transportation Analysis, Tromso, Noruega, 20-25 Junho, 2010.

S. Nickel, F. Saldanha da Gama, H.-P. Ziegler, “A multi-stage stochastic supply chain network design problem with financial decisions and risk management”, EWGLA XVIII - 18th Meeting of the EURO Working Group in Locational Analysis, Naples, Italy, 28-30 April, 2010 (presented by H.-P. Ziegler).

M. Albareda-Sambola, E. Fernández, F. Saldanha da Gama, “The Facility Location Problem with Bernoulli Demands: Exact Solution”, EWGLA XVIII - 18th Meeting of the EURO Working Group in Locational Analysis, Naples, Italy, 28-30 April, 2010 (presented by M. Albareda-Sambola).

M. T. Melo, I. Correia, F. Saldanha da Gama, “A multi-commodity two-echelon capacitated facility location problem with sizing decisions”, EWGLA XVIII - 18th Meeting of the EURO Working Group in Locational Analysis, Naples, Italy, 28-30 April, 2010 (presented by M. T. Melo).

I. Correia, S. Nickel, F. Saldanha da Gama, “Single-assignment hub location problems with multiple capacity levels”, EWGLA XVIII - 18th Meeting of the EURO Working Group in Locational Analysis, Naples, Italy, 28-30 April, 2010 (presented by I. Correia).

I. Correia, L. Lampreia Lourenço, F. Saldanha da Gama, “Uma formulação com desigualdades adicionais para um problema de escalonamento de actividades com recursos flexíveis”, IO 2009, 14º Congresso da Associação Portuguesa de Investigação Operacional (APDIO), Monte da Caparica, Portugal, 7-9 September 2009 (presented by L. Lampreia-Lourenço).

I. Correia, S. Nickel, F. Saldanha da Gama, “Problema de localização de hubs com escolha de capacidades”, IO 2009, 14º Congresso da Associação Portuguesa de Investigação Operacional (APDIO), Monte da Caparica, Portugal, 7-9 September 2009 (presented by I. Correia).

I. Correia, L. Lampreia Lourenço, F. Saldanha da Gama, “Project scheduling with flexible resources: formulation and inequalities”, EURO XXIII – 23rd European Conference in Operational Research, Bonn, Germany, 5-8 July, 2009.

I. Correia, S. Nickel, F. Saldanha da Gama, “Hub location problems with capacity choices”, EURO XXIII – 23rd European Conference in Operational Research, Bonn, Germany, 5-8 July, 2009 (presented by I. Correia).

M. T. Melo, S. Nickel, F. Saldanha da Gama, “Lp-rounding and local search techniques to solve a multi-period facility relocation problem”, EURO XXIII – 23rd European Conference in Operational Research, Bonn, Germany, 5-8 July, 2009 (presented by M. T. Melo).

M. Albareda-Sambola, E. Fernández, F. Saldanha da Gama, “A capacitated facility location problem with Bernoulli demands”, CORAL 2009 - III Combinatorial Optimization, Routing and Location Meeting, Elche, Spain, 10-12 June, 2009.

M. T. Melo, S. Nickel, F. Saldanha da Gama, “A heuristic approach for a multi-period supply chain redesign problem”, Odysseus 2009 - Fourth International Workshop on Freight Transportation and Logistics, Çesme, Izmir, Turkey, 26-29 May, 2009.

I. Correia, L. Gouveia, F. Saldanha da Gama, “Discretized reformulations for a capacitated network loading problem arising in a facility location context”, INOC’2009 – International Network Optimization Conference, Pisa, Italy, 26-29 April, 2009.

M. T. Melo, S. Nickel, F. Saldanha da Gama, “Solving a multi-period production/distribution network design problem with tabu search”, EWGLA XVII - 17th Meeting of the EURO Working Group in Locational Analysis, Elche, Spain, 17-19 September, 2008 (presented by M. T. Melo).

M. Albareda-Sambola, E. Fernández, F. Saldanha da Gama, “The facility location problem with Bernoulli demands”, EWGLA XVII (17th Meeting of the EURO Working Group in Locational Analysis), Elche, Spain, 17-19 September, 2008 (presented by M. Albareda-Sambola).

M. C. Fonseca, A. García-Sánchez, M. Ortega-Mier, F. Saldanha da Gama, “A stochastic bi-objective location model for reverse logistics”, EWGLA XVII - 17th Meeting of the EURO Working Group in Locational Analysis, Elche, Spain, 17-19 September, 2008 (presented by A. García-Sánchez).

I. Correia, L. Gouveia, F. Saldanha da Gama, “Discretized Reformulations for a Capacitated Network Loading Problem arising in a Facility Location Context”, GOM 2008 (Graph and Optimization Meeting), Saint-Maximin, La Sainte Baume, France, 24-27 August, 2008 (presentation only by invitation).

M. Albareda-Sambola, E. Fernández, F. Saldanha da Gama, “The facility location problem with stochastic demands”, IFORS 2008 (Conference of the International Federation of the Operational Research Societies), Sandton, South Africa, 13-18 July, 2008 (presented by M. Albareda-Sambola).

I. Correia, L. Gouveia, F. Saldanha da Gama, “Discretized Reformulations for Capacitated Location Problems with Modular Distribution Costs”, ISOLDE XI – International Symposium on Locational Decisions, Santa Barbara, California, USA, 26 June-1 July, 2008.

I. Correia, L. Gouveia, F. Saldanha da Gama, “Discretized Reformulations for Capacitated Location Problems with Modular Distribution Costs”, IWOR – International Workshop on Operational Research, Madrid, Spain 5-7 June, 2008 (presentation only by invitation).

M. Albareda-Sambola, E. Fernández, F. Saldanha da Gama, “The facility location problem with Bernoulli demands”, IWOR – International Workshop on Operational Research, Madrid, Spain 5-7 June, 2008 (presented by M. Albareda-Sambola) .

L. J. Fernandes, F. Saldanha da Gama, “Um modelo para o planeamento preventivo, correctivo e de contingência em sistemas de informação”, IO 2008, 13º Congresso da Associação Portuguesa de Investigação Operacional (APDIO), Vila-Real, Portugal, 17-19 March, 2008 (presented by L. J. Fernandes).

I. Correia, L. Gouveia, F. Saldanha da Gama, “Discretized Reformulations for Capacitated Location models with variable distribution costs”, GOR 2007, Annual meeting of the German OR Society, Saarbrücken, Germany, 5-7 September, 2007.

I. Correia, L. Gouveia, F. Saldanha da Gama, “Discretized Reformulations for Capacitated Location models with variable distribution costs”, Optimization’2007, Porto, Portugal, 22-25 July, 2007 (presented by I. Correia).

I. Correia, L. Gouveia, F. Saldanha da Gama, “Discretized formulations for Capacitated Location models with variable distribution costs”, INOC’2007, Spa, Belgium, 20-23 March, 2005.

I. Correia, L. Gouveia, F. Saldanha da Gama, “Discretized formulations for Location models with variable distribution costs”, Red Temática de Análisis y Aplicaciones de Decisiones sobre Localización de Servicios y Problemas Relacionados, Baeza, Spain, 19-21 March, 2007.

I. Correia, L. Gouveia, F. Saldanha da Gama, “Discretized formulations for Location models with variable distribution costs”, EWGLA XVI – 16th Meeting of the EURO Working Group on Locational Analysis, Estoril, Portugal, 9-11 February, 2007 (presented by I. Correia).

M. M. S. Carvalho, F. Saldanha da Gama, “Solving a dynamic location problem by cross decomposition”, EWGLA XVI – 16th Meeting of the EURO Working Group on Locational Analysis, Estoril, Portugal, 9-11 February, 2007 (presented by M. M. S. Carvalho).

I. Correia, L. Gouveia, F. Saldanha da Gama, “Discretized formulations and valid inequalities for the variable size bin packing problem”, Iberian Conference in Optimization, Coimbra, Portugal, 16-18 November, 2006 (presented by I. Correia).

M. M. S. Carvalho, F. Saldanha da Gama, “Resolução de um problema de localização dinâmica por decomposição cruzada”, IO 2006, 12º Congresso da Associação Portuguesa de Investigação Operacional (APDIO), Lisbon, Portugal, 8-11 October, 2006 (presented by M. M. S. Carvalho).

I. Correia, L. Gouveia, F. Saldanha da Gama, “Um modelo discretizado para um problema de localização com custos modulares”, IO 2006, 12º Congresso da Associação Portuguesa de Investigação Operacional (APDIO), Lisbon, Portugal, 8-11 October, 2006 (presented by I. Correia).

I. Correia, L. Gouveia, F. Saldanha da Gama, “Problema de Bin-packing com diferentes tipos de bins: formulações discretizadas e desigualdades válidas.”, IO 2006, 12º Congresso da Associação Portuguesa de Investigação Operacional (APDIO), Lisbon, Portugal, 8-11 October, 2006 (presented by I. Correia).

I. Correia, L. Gouveia, F. Saldanha da Gama, “Discretized formulations for capacitated location models with variable distribution costs.”, SCRA’2006 – Interdisciplinary Mathematical and Statistical Techniques, Tomar, Portugal, 1-4 September, 2006 (presented by Isabel Correia).

P. Machado, F. Saldanha da Gama, “Estimating the optimum of a Job-shop scheduling problem”, SCRA’2006 – Interdisciplinary Mathematical and Statistical Techniques, Tomar, Portugal, 1-4 September, 2006.

I. Correia, L. Gouveia, F. Saldanha da Gama, “Solving the variable size bin packing problem with discretized formulations”, EURO XXI – 21st European Conference in Operational Research, Reykjavic, Iceland, 2-5 July, 2006.

I. Correia, L. Gouveia, F. Saldanha da Gama, “Discretized formulations for discrete location models with modular costs”, EURO XXI – 21st European Conference in Operational Research, Reykjavic, Iceland, 2-5 July, 2006.

L. Gouveia, F. Saldanha da Gama, “Modelos de Localização: reformulação por discretização” SPM’2006 – Encontro da Sociedade Portuguesa de Matemática, Lisbon, 20-23 June, 2006.

I. Correia, L. Gouveia, F. Saldanha da Gama, “Solving the variable size bin packing problem with discretized formulations”, ECCO XIX – CO’2006 – 19th Conference of European Chapter on Combinatorial Optimization (ECCO) / Biennial International Symposium on Combinatorial Optimisation (CO), Oporto, Portugal, 11-13 May, 2006 (presented by I. Correia).

L. Gouveia, F. Saldanha da Gama, “Concentrator location problems using a reformulation by discretization: some multi-period cases”, ISOLDE X – Tenth International Symposium on Locational Decisions, Seville and Islantilla, Spain, 2-8 June, 2005.

M. M. S. Carvalho, M. T. Melo, F. Saldanha da Gama, “A cross decomposition scheme for a multi-period phase-in/phase-out capacitated facility location problem”, ISOLDE X – Tenth International Symposium on Locational Decisions, Seville and Islantilla, Spain, 2-8 June, 2005 (presented by M. M. S. Carvalho).

M. T. Melo, R. Velásquez, F. Saldanha da Gama, “A two-stage heuristic approach for a dynamic multi-commodity facility location problem”, ISOLDE X – Tenth International Symposium on Locational Decisions, Seville and Islantilla, Spain, 2-8 June, 2005 (presented by M. T. Melo).

L. Gouveia, F. Saldanha da Gama, “Location models: a reformulation by discetization”, Optimization Days 2005, Montréal, Canada, 9-11 May 2005.

M. M. S. Carvalho, F. Saldanha da Gama, “A decomposition scheme for a multi-period phase-in/phase-out location problem”, INOC’2005 – International Network Optimization Conference, Lisbon, Portugal, 20-23 March, 2005.

M. M. S. Carvalho, F. Saldanha da Gama, “A decomposition scheme for a multi-period capacitated location problem”, EWGLA XV – 15th Meeting of the EURO Working Group on Locaional Analysis, Saarbrücken, Germany, 5-8 September, 2004.

L. Gouveia, F. Saldanha da Gama, “Location Models: A reformulation by discretization”, Optimization’2004, Lisbon, Portugal, 25-28 July, 2004.

L. Gouveia, F. Saldanha da Gama, “Location models: a reformulation by discetization”, CO’2004 – Biennial International Symposium on Combinatorial Optimisation, Lancaster, UK, 28-31 March, 2004.

L. Gouveia, F. Saldanha da Gama, “Location models: a reformulation by discetization”, EWGLA XIV – 14th Meeting of the EURO Working Group on Locaional Analysis, Corfu, Greece, 11-13 September, 2003.

M. T. Melo, S. Nickel, F. Saldanha da Gama, “Dynamic multi-commodity facility location: A mathematical modeling framework for strategic supply chain planning”, GOR’2003 – Gesellschaft für Operations Research, Heidelberg, Germany, 3-5 September, 2003 (presented by Teresa Melo).

L. Gouveia, F. Saldanha da Gama, “Location models: a reformulation by discetization”, ISMP’2003 – International Symposium on Mathematical Programming, Copenhagen, Denmark, 18-22 August, 2003.

M. E. Captivo, F. Saldanha da Gama, “A branch-and-bound procedure for a multiperiod capacitated location problem”, ISOLDE IX – Nineth International Symposium on Locational Decisions, Fredericton and St Andrews, New Brunswick, Canada, 12-18 June, 2002.

M. E. Captivo, F. Saldanha da Gama, “Utilização de um algoritmo para a Determinação dos K caminhos mais curtos na resolução do Problema de Localização Dinâmica com Restrições Orçamentais”, IO 2002 - 10º Congresso da Associação Portuguesa de Investigação Operacional (APDIO), Guimarães, Portugal, 24-27 March, 2002.

M. E. Captivo, F. Saldanha da Gama, “Procedures for the Dynamic Location Problem with Budget Constraints”, Optimization’2001, Aveiro, Portugal, 23-25 July, 2001.

M. E. Captivo, F. Saldanha da Gama, “Exact and Heuristic Procedures for the Discrete Dynamic Location Problem with Budget Constraints”, EWGLA XII – 12th Meeting of the EURO Working Group on Locaional Analysis, Barcelona, Spain, 14-17 December, 2000.

M. E. Captivo, F. Saldanha da Gama, “Lower bounds for the Capacitated Discrete Dynamic Location Problem”, ISMP’2000 – International Symposium on Mathematical Programming, Atlanta, Georgia, USA, 7-11 August, 2000.

M. E. Captivo, F. Saldanha da Gama, “Analysing two solution procedures for the Capacitated Discrete Dynamic Location Problem”, ISOLDE VIII – Eighth International Symposium on Locational Decisions, Coimbra and Estoril, Portugal, 23-29 June, 1999.

M. E. Captivo, F. Saldanha da Gama, “On dynamic location models., 44th Meeting of the Regional Science Association International (RSAI), Buffalo, NY, EUA, 6-9 November, 1997.

M. E. Captivo, F. Saldanha da Gama, “Algorithms for the Discrete Dynamic Location Problem with Budget Constraints”, EURO XV/INFORMS XXXIV, Joint International Meeting, Barcelona, Spain, 14-17 July, 1997.

M. E. Captivo, F. Saldanha da Gama, “New approaches for the Discrete Dynamic Location Problem”, ISOLDE VII – Seventh International Symposium on Locational Decisions, Edmonton and Jasper, Alberta, Canada, 26 June – 3 July, 1996.

M. E. Captivo, F. Saldanha da Gama, “Heurísticas para localizar serviços ao longo do tempo”, IO 1996 - 7º Congresso da Associação Portuguesa de Investigação Operacional (APDIO), Aveiro, Portugal, 1-3 April, 1996.

M. E. Captivo, F. Saldanha da Gama, “The dynamic location problem under investment constraints”, EWGLA VIII – 8th Meeting of the EURO Working Group on Locaional Analysis, Lambrecht, Germany, 24-28 September, 1995.

M. E. Captivo, F. Saldanha da Gama, “A study about dynamic location problems”, Optimization’95, Braga, Portugal, 17-19 July, 1995 (presented by M. E. Captivo).

M. E. Captivo, F. Saldanha da Gama, “Algoritmos para o Problema de Localização Dinâmica”, IO 1994 - 6º Congresso da Associação Portuguesa de Investigação Operacional (APDIO), Braga, Portugal, 28-30 March, 1994.

M. E. Captivo, F. Saldanha da Gama, “O problema de localização dinâmica com restrições ao investimento”, 4ª Conferência do Centro de Matemática Aplicada à Previsão e Decisão Económica (CEMAPRE), Lisbon, Portugal, 23-25 March, 1994.

M. L. Carvalho, F. Saldanha da Gama, “Um plano de sondagem de tráfego telefónio”, Primeira Conferência da Sociedade Portuguesa de Estatística (SPE), Vimeiro, Portugal, 14-17 June, 1993.