Encontrados 145 documentos, a visualizar página 1 de 15

A Bacia Lusitaniana : estratigrafia, paleogeografia e tectónica

Investigação em Arqueometalurgia em Portugal, resultados recentes e perspectiva...

Nos últimos anos, uma equipa de investigadores tem-se dedicado à Arqueometalurgia do território hoje português,em colaboração com institutos públicos, universidades, museus ou empresas de arqueologia. Recentemente,foi aprovado pela Fundação para a Ciência e a Tecnologia o projecto EARLYMETAL, que estuda a evolução metalúrgica nesse território desde os seus primórdios, no Calcolítico, até ao período Orientalizan...

Structural and functional responses of benthic invertebrates to imidacloprid in...

Structural and functional responses of a benthic macroinvertebrate assemblage to pulses of the insecticide imidacloprid were assessed in outdoor stream mesocosms. Imidacloprid pulses reduced invertebrate abundance and community diversity in imidacloprid-dosed streams compared to control streams. These results correlated well with effects of imidacloprid on leaf litter decomposition and feeding rates of Pteronar...

On the dynamics and linear stability of one-dimensional steady detonation waves

A detailed analysis of the dynamics and linear stability of a steady one-dimensional detonation wave propagating in a binary reactive system with an Arrhenius chemical kinetics of type A + A = B + B is carried out. Starting from the frame of the kinetic theory, the binary reactive mixture is modelled at the mesoscopic scale by the reactive Boltzmann equation (BE), assuming hard sphere cross sections for elastic...

The interplay of phonology and orthography in visual cognate word recognition :...

This study examined the role of phonological and orthographic overlap in the recognition of cognate words by recording electrophysiological and behavioral data. One hundred and ninety-two words were selected: 96 cognate words listed according to their phonological and orthographic overlap vs. 96 noncognate words. Twenty-four proficient European Portuguese-English bilinguals performed a silent reading task with ...

Influence of reaction heat on time dependent processes in a chemically reacting...

In this paper we study time dependent problems, like the propagation of sound waves or the behavior of small local wave disturbances induced by spontaneous internal fluctuations, in a binary mixture undergoing a chemical reaction of type A+A= B+B. The study is developed at the hydrodynamic Euler level, in a chemical regime of fast reactive process in which the chemical reaction is close to its final equilibrium...

Kinetic approach to reactive mixtures : theory, modelling and applications

This paper reviews some previous studies published in other papers. ; Some recent studies arising in the kinetic theory of chemically reactive mixtures will be revisited here, with the aim of describing some methods and tools of the kinetic theory used to model reactive mixtures and investigate some mathematical and physical problems.

Detonation wave problems : modeling, numerical simulations and linear stability

A publicar em "Hyperbolic problems : theory, numerics, applications. Springfield : AIMS, 2014. ISBN 978-1-60133-017-8, p. 407-414. Serie: Applied mathematics, vol. 8" ; Traveling waves arising in detonation physics are described by the reactive Euler equations obtained in the fluid dynamical limit of the Boltzmann equation for a binary reactive mixture. The hydrodynamic linear stability of the detonation wave ...

Entire hemithorax irradiation for Masaoka stage IVa thymomas

Thymomas are rare neoplasms that have an indolent growth with a preferentially intra-thoracic dissemination pattern. Surgery is currently the standard treatment of thymomas; however radiotherapy is often used in an adjuvant setting due to a high sensitivity of these tumors to such treatment. Postoperative entire hemithoracic irradiation has been used in selected Masaoka stage IVa cases after complete surgical e...

Entire hemithorax irradiation for Masaoka stage IVa thymomas

Thymomas are rare neoplasms that have an indolent growth with a preferentially intra-thoracic dissemination pattern. Surgery is currently the standard treatment of thymomas; however radiotherapy is often used in an adjuvant setting due to a high sensitivity of these tumors to such treatment. Postoperative entire hemithoracic irradiation has been used in selected Masaoka stage IVa cases after complete surgical e...