Research (Past):
2008
Local analysis of the feasible primal-dual interior point method (with R. Silva and L. N. Vicente), Computational Optimization and Applications, vol. 40, 41-57, 2008. [published pdf].
2007
Computing time dependent waiting time probabilities in M(t)/M/s(t) queueing systems (with L. Green), Manufacturing & Service Operations Management, vol. 9, n. 1, 54-61, 2007. [unpublished pdf] [published pdf]
2006
Using queueing theory to increase the effectiveness of physician staffing in the emergency department (with L. Green, J. Giulio and R. Green), Academic Emergency Medicine, vol. 13, n. 1, 61-68, 2006. [published pdf], see also [published pdf], see here for coverage by the portuguese media.
2005
Aplicação do algoritmo volumétrico na resolução aproximada e exacta do problema do caixeiro viajante assimétrico (com A. Rocha, E. Fernandes), Investigação Operacional, vol.25, no.2, 277-294, 2005. [unpublished pdf] [published pdf]
Solving the Traveling Repairman problem with differentiated waiting times through Lagrangian relaxation Rocha (with A. Rocha e E. Fernandes) Actas do I Congresso de Estatística e Investigação Operacional da Galiza e Norte de Portugal / VII Congreso Galego de Estatística e Investigación de Operacións, Universidade do Minho (publicado em CDRom), ISBN: 972-99841-0-7, 6 páginas, 2005. [published pdf]
A first-order $\epsilon$-approximation algorithm for linear programs and a second-order implementation (with A. Rocha e E. Fernandes) Lecture Notes for Computer Science, vol. 3483, pp 488-498. Computational Science and Its Applications – ICCSA 2005: International Conference, Singapore, May 9-12, 2005, Proceedings. [published pdf]
Um melhor limite inferior para o problema do caixeiro viajante assimétrico baseado no problema da afectação (com A. Ramires), Investigação Operacional, Vol. 25, No. 1, pp 63-84. [published pdf]
2003
Convex programming tools for disjunctive programs, Modelling and Simulation in Chemical Engineering conference proceedings, A. Rodrigues et al eds., CIM, n. 22, July 2003. [published pdf]
An Improved Heuristic for Staffing Telephone Call Center Centers with Limited Operating Hours (with L. Green and P. Kolesar), Production and Operations Management, Vol. 12, No. 1, pp. 46-61, 2003. [published pdf]
2001
Improving the SIPP approach for staffing service systems that have cyclic demands (with L. Green and P. Kolesar), Operations Research, Vol. 49, No. 4, pp. 549-564, 2001.
1999
Convex Programming for Disjunctive Convex Optimization (with S. Ceria) Math. Programming, v. 86, n.3, p. 595-614, 1999.
1998
A block active set algorithm for large-scale quadratic programming with box constraints (with L. Fernandes, A. Fischer, J. Judice and C. Requejo, Annals of Operations Research, v. 81, p. 75-95, 1998.
An active set Newton's algorithm for large-scale nonlinear programs with box constraints (with F. Facchinei and J. Judice), SIAM J. Optimization, v. 8, p. 158-186, 1998.
1997
Generating box-constrained optimization problems (with F. Facchinei and J. Judice), ACM Trans. Math. Software, v. 23, p. 443-447, 1997.
Algorithm 774: Fortran Subroutines for generating box-constrained optimization problems (with F. Facchinei and J. Judice) ACM Trans. Math. Software, v. 23, p. 448-450, 1997. Computer code available through Collected Algorithms of ACM.
A new merit function for the nonlinear complementarity problem and a related algorithm (with F. Facchinei), SIAM J. Optimization, v. 7, p. 225-247, 1997.
1995
Testing a new class of algorithms for nonlinear complementarity problems (with F. Facchinei) "" in Variational Inequalities and Network Equilibrium Problems, F. Gianessi and A. Maugeri eds., p. 69-83, Plenum Press, 1995.
1994
A study on Newton's method for unconstrained optimization, Investigacao Operacional, v. 14, p. 233-258, 1994.
Last update: Octobert 11th, 2005