Education Composition and Growth: A Pooled Mean Group Analysis of OECD Countries

This paper uses the pooled mean group (PMG) estimator and a dataset restricted to OECD countries to examine the relationship between different levels of education, i.e. between education composition and growth. The PMG estimator allows a greater degree of parameter heterogeneity than the usual estimator procedures used in empirical growth studies by imposing common long run relationships across countries while allowing for heterogeneity in the short run responses and intercepts. Results point to a significant longterm relationship not only between higher education and growth but also between lower schooling levels and growth. This indicates that public spending on education in OECD countries should be spread across the different levels of education in a balanced way.Levels of education, Economic growth, Dynamic heterogeneous panels.

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Response of clamped structural slabs subjected to a dynamic point load via BEM

This work computes the response of clamped slabs when subjected to spatially sinusoidal harmonic line loads via the Boundary Element Method (BEM). The formulation uses 2.5D Green's functions for the steady state response of a homogeneous three-dimensional free solid layer formation of infinite extent, proposed earlier by the authors. The inclusion of these Green's functions in the BEM formulation avoids the discretization of free horizontal surfaces, which contributes to the efficiency of the BEM model. Frequency and time responses have been computed for slabs with and without lateral confinements, for different thickness and varying spatially sinusoidal harmonic line loads.http://www.sciencedirect.com/science/article/B6V2Y-478B3WC-2/1/858485466df347cb0aab610316d65e7

Conduction and convection phenomena through a slab with thermal heterogeneities

This paper addresses the computation of the three-dimensional transient heat transfer through a layered solid and/or fluid formation containing irregular inclusions. The use of appropriate Green's functions for a flat layer formation in a boundary element method formulation avoids the discretization of the layer interface boundaries.http://www.sciencedirect.com/science/article/B6TYC-4K9C6V7-2/1/96b8b86fbaedc32af474f6ac79ac67c

O significado da filosofia da humanitude, no contexto dos cuidados de enfermagem à pessoa dependente e vulnerável

Revisão sistemática seguindo a metodologia dos sete passos do Cochrane Handbook, formulando a seguinte questão: Qual o significado do conceito integrador de humanitude, no contexto dos complexos e delicados cuidados que os enfermeiros prestam, a pessoas doentes vulneráveis e dependentes? No processo de resposta à questão, seguindo a metodologia sistemática, com base numa estratégia de pesquisa refinada e exaustiva a bases de dados relevantes, não se obtiveram respostas aos descritores relacionados com cuidados de enfermagem, que intersectem o conceito humanitude. No entanto, através de motores de busca e contacto com investigadores nacionais e estrangeiros, foi possível recolher um pequeno acervo de documentos, que revelam a pertinência da questão de investigação e indicam a existência de trabalho avançado na aplicação da filosofia da humanitude aos cuidados de enfermagem. O trabalho mais relevante é o método de Gineste e Marescotti, no cuidado a doentes dependentes e vulneráveis, desde 1975. Com este estudo de revisão, observa-se uma nova oportunidade de investigação, através da implementação e monitorização do método, com uma população de pessoas doentes dependentes, em Portugal

Application of the S=1 underscreened Anderson lattice model to Kondo uranium and neptunium compounds

Magnetic properties of uranium and neptunium compounds showing the coexistence of Kondo screening effect and ferromagnetic order are investigated within the Anderson lattice Hamiltonian with a two-fold degenerate $f$-level in each site, corresponding to $5f^2$ electronic configuration with $S=1$ spins. A derivation of the Schrieffer-Wolff transformation is presented and the resulting Hamiltonian has an effective $f$-band term, in addition to the regular exchange Kondo interaction between the $S=1$ $f$-spins and the $s=1/2$ spins of the conduction electrons. The obtained effective Kondo lattice model can describe both the Kondo regime and a weak delocalization of $5f$-electron. Within this model we compute the Kondo and Curie temperatures as a function of model parameters, namely the Kondo exchange interaction constant $J_K$, the magnetic intersite exchange interaction $J_H$ and the effective $f$-bandwidth. We deduce, therefore, a phase diagram of the model which yields the coexistence of Kondo effect and ferromagnetic ordering and also accounts for the pressure dependence of the Curie temperature of uranium compounds such as UTe.Comment: 9 pages, 4 figure

Correlation in the velocity of a Brownian particle induced by frictional anisotropy and magnetic field

We study the motion of charged Brownian particles in an external magnetic field. It is found that a correlation appears between the components of particle velocity in the case of anisotropic friction, approaching asymptotically zero in the stationary limit. If magnetic field is smaller compared to the critical value, determined by frictional anisotropy, the relaxation of the correlation is non-oscillating in time. However, in a larger magnetic field this relaxation becomes oscillating. The phenomenon is related to the statistical dependence of the components of transformed random force caused by the simultaneous influence of magnetic field and anisotropic dissipation.Comment: 7 pages, 2 figure