Papers in International Journals

• Morais, M. C. ; Pacheco, António (2007) Shewhart schemes with variable sampling intervals revisited Sequential Analysis-Design Methods and Applications: 26(3), 265–282.

• Diogo, Teresa; Ford, N.J; Lima, Pedro M.; Thomas, S. (2007) Solution of a singular integral equation by a split- interval method  International Journal of Numerical Analysis and Modeling: (167)4, 63-73.

• Galdi, Giovanni P.; Silvestre, Ana Leonor (2007) The steady motion of a Navier-Stokes liquid around a rigid body Arch. Rational Mech. Anal.: 3, 371-400.

• Bentz, Wolfram (2006) A Characterization of Hausdorff Separation for a Special Class of Varieties Algebra Universalis: 55, 259 – 276.

• Serranho, Pedro (2006) A Hybrid Method for Inverse Scattering for Shape and Impedance Inverse Problems: 22(2), 663-680.

• Ferreira, Helena (2006) A new model for time series dependence and the extremal index of higher-order Markov chains RevStat: 4(2), 143-151.

• Ferreira, Fátima; Pacheco, António (2006) Analysis of GI/M/s/c queues using uniformization Computers & Mathematics with Applications: 51(2), 291-304.

• Antunes, Nelson; C. Fricker; D. Tibi.; P. Robert (2006) Analysis of loss networks with routing Annals of Applied Probability: 16(4), 2007-2026.

• Lima, Pedro M.; Morgado, M. Luísa (2006) Analysis of Singular Boundary Value Problems for an Emden-Fowler Equation Communications on Pure and Applied Analysis: 5(2), 321-336.

• Morais, M. C. ; Pacheco, António (2006) Assessing the impact of head starts in the performance of one-sided Markov-type control schemes Sequential Analysis-Design Methods and Applications: 25(4), 405-420.

• Morais, M. C. ; Pacheco, António (2006) Combined CUSUM-Shewhart schemes for binomial data Economic Quality Control: 21(1), 43-57.

• Couceiro, Miguel; Foldes, Stephan; Lehtonen, Erkko (2006) Composition of Post classes and normal forms of Boolean functions Discrete Math.: 306, 3223-3243.

• Alves, Carlos J. S.; Leitao, VMA (2006) Crack Analysis Using an Enriched MFS Domain Decomposition Technique Engineering Analysis with Boundary Elements: 30(3), 160-166.

• Lehtonen, Erkko (2006) Descending chains and antichains of the unary, linear, and monotone subfunction relations Order: 23, 129-142.

• Galdi, G. P.; Silvestre, Ana Leonor (2006) Existence of time-periodic solutions to the Navier-Stokes equations around a moving body Pacific J. Math.: 223, 2251-267.

• Hall, Andreia; Scotto, Manuel (2006) Extremes of periodic integer-valued sequences with exponential type tails Revstat: 4, 249-273.

• Fountain, John B.; Gomes, Gracinda M. S. (2006) Finite abundant semigroups in which the idempotents form a subsemigroup Journal of Algebra: 295, 303-313.

• Boente, Graciela; Pires, Ana M.; Rodrigues, Isabel M. (2006) General projection--pursuit estimators for common principal components model: Influence functions and Monte Carlo study. Journal of Multivariate Analysis: 97, 124-147.

• Araújo, João (2006) Lifts for Semigroups of Endomorphisms of an Independence Algebra Colloquium Mathematicum: 106, 39-56.

• Pereira, L.; Ferreira, Helena (2006) Limiting crossing probabilities of random fields Journal of Applied Probability: 43(3), 884-891.

• Kwiatkowska, M; Norman, G; Pacheco, António (2006) Model Checking Expected Time and Expected Reward Formulae with Random Time Bounds Computers & Mathematics with Applications: 51(2), 305-316.

• Antunes, Pedro R. S.; Freitas, Pedro (2006) New Bounds for the Principal Dirichlet Eigenvalue of Planar Regions Experimental Mathematics: 15(3), 333-342.

• Martins, Rachel; John W. Barrett (2006) Noncommutative geometry and the standard model vacuum Journal of mathematical physics: 47, 052305.

• Martins, Rachel (2006) Noncommutative geometry, topology and the standard model vacuum Journal of mathematical physics: 47, 113507.

• Kulikov, Gennady Yu; Shindin, S.K. (2006) Nordsieck methods on nonuniform grids: Stability and order reduction phenomenon Mathematics and Computers in Simulation: 72(1), 47-56.

• Diogo, Teresa; Lima, Pedro M.; Ford, Neville J.; Valtchev, Svilen S.  (2006) Numerical Methods for a Volterra Integral Equation with Non-smooth Solutions Journal of Computational and Applied Mathematics: 189(1-2), 412–423.

• Diogo, Teresa; Lima, Pedro M.; Rebelo, M (2006) Numerical Solution of a Nonlinear Abel Type Volterra Integral Equation Communications on Pure and Applied Analysis: 5(2), 277-288.

• Kulikov, Gennady Yu; Shindin, S.K. (2006) On a family of cheap symmetric one-step methods of order four Lecture Notes in Computer Science: 3991, 781-785.

• Pereira, Isabel; Scotto, Manuel (2006) On the non-negative first-order exponential bilinear time series model Statistics & Probability Letters: 76, 931-938.

• Morais, M. C. ; Okhrin, Y.; Pacheco, António; Schmid, W. (2006) On the stochastic behaviour of the run length of EWMA control schemes for the mean of correlated output in the presence of shifts in sigma Statistics & Decisions: 24, 1001-1018.

• Kulikov, Gennady Yu; Shindin, S.K.  (2006) One-leg variable-coefficient formulas for ordinary differential equations and the local-global step size control Numerical Algorithms: 43(1), 99-121.

• Ferreira, J. M. ; Pinelas, Sandra (2006) Oscillatory mixed difference systems Advances in Difference Equations: Article ID 92923, 1-18.

• Antunes, Nelson; C. Fricker; F. Guillemin; P. Robert (2006) Perturbation analysis of a variable M/M/1 queue: A probabilistic approach Advances in Applied Probability: 38(1), 263–283.

• Gomes, Gracinda M. S.; Pin, J.-E.; Sezinando, Helena (2006) Presentations of the Schützenberger product of n groups Communications in Algebra: 34 (4), 1213-1235.

• Fountain, J.B.; Gomes, Gracinda M. S. (2006) Proper covers of ample monoids Proc. Edinb. Math. Soc.: 49, 277-289.

• Kulikova, Maria; Semoushin, I. V. (2006) Score Evaluation Within the Extended Square-Root Information Filter Lecture Notes in Computer Science: 3991, 473-481.

• Kulikov, Gennady Yu; Khrustaleva, E.Yu.; Merkulov, A.I. (2006) Symmetric Runge-Kutta methods with higher derivatives and quadratic extrapolation Lecture Notes in Computer Science: 3991, 117-123.

• Ferreira, Helena (2006) The crossings index and the extremal index Journal of Applied Probability: 43(4), 927-937.

• Gomes, Gracinda M. S. (2006) The generalized prefix expansion of a weakly left ample semigroup Semigroup Forum: 72 (3), 387-403.

• Branco, Mário J. J. (2006) Two algebraic approaches to variants of the concatenation product Theoret. Comput. Sci.: 369, 406-426.

• Diogo, Teresa; Edwards, J T; Ford, NJ; Thomas,S M (2005)  Numerical analysis of a singular equation Applied Mathematics and Computaion: 167, 372-382.

• Araújo, João; Fountain, John (2005) A Description of Normal Semigroups of Endomorphisms of Proper Independence Algebras Communications in Algebra: 33, 2705-2711.

• Robertson, AM; Sequeira, Adélia (2005) A Director Theory Approach for Modeling Blood Flow in the Arterial System: An Alternative to Classical 1D Models Mathematical Models & Methods in Applied Sciences: 15(6), 871-906.

• Alves, Carlos J. S.; Chen, CS (2005) A New Method of Fundamental Solutions Applied to Nonhomogeneous Elliptic Problems Advances in Computational Mathematics: 23(1-2), 125-142.

• Bordalo, Gabriela Hauser (2005) A note on essentially convex orders Algebra Universalis: 53, 281-285.

• Araújo, João; Mitchell, James D. (2005) An elementary proof that every singular matrix is a product of idempotent matrices American Mathematical Monthly: 112 (7), 641-645.

• Fernandes, Vítor Hugo; Gomes, Gracinda M. S.; Jesus, Manuel M. (2005) Congruences on monoids of order-preserving or order-reversing transformations on a finite chain Glasgow Mathematical Journal: 47, 413-424.

• Araújo, João; Konieczny, Janusz (2005) Dense Relations Are Determined by Their Endomorphism Monoid Semigroup Forum: 70, 2, 302-306.

• Arada, N. ; Sequeira, Adélia (2005) Existence results for steady flows of quasi-Newtonian fluids using weak monotonicity J. Math. Fluid Mech.: 7, sup 2, 273-288.

• Scotto, Manuel (2005) Extremes of a class of deterministic sub-sampled processes with applications to stochastic difference equations Stochastic Processes and their Applications: 115, 417-434.