Título completo:

"Caracterização da invertibilidade de operadores provenientes de adições algébricas de operadores do tipo de Wiener-Hopf e do tipo de Hankel"

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The effective conductivity of 2D composite materials is determined in several cases via reduction of the governing equations to a mixed boundary value problems for holomorphic functions. One of the approaches is connected with an optimization problem on the solution set to the mixed boundary...

Vortex line formalism for solutions of the Euler equation without forcing is introduced, and results of preliminary numerical experiments are discussed.

Hydrodynamic and magnetohydrodynamic convective attractors in a plane horizontal layer are investigated numerically. We consider Boussinesq Rayleigh-Benard convection assuming stress-free boundary conditions on horizontal boundaries and periodicity in horisontal directions. For the considered ...

For any Reynolds number an ABC flow is a steady state solution to the Navier-Stokes equation with the appropriate forcing. When the flow becomes unstable in a Hopf bifurcation, a complex sequence of bifurcations takes
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O Teorema de amostragem de Whittaker-Shannon-Kotelnikov é um resultado fundamental em Engenharia de Comunicações, nomeadamente na Teoria do Sinal, pois permite aos engenheiros reconstruir um dado sinal a partir das suas amostras num conjunto discreto de pontos.
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Introduction to a hyperspectal analysis of remote sensing data is given. Correlation and sub-pixel
methods for hypespectral data processing obtained by airborne apparature usage are presented.

The problem of front propagation in a stirred medium is addressed in the case of cellular flows in
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Considera-se uma equação não autónoma do tipo Cahn-Hilliard. Demonstra-se a existência da solução fraca. Utilizando métodos de controlo óptimo resolve-se um problema de arrefecimento uniforme de ligas.