A elaboração do presente artigo tem como principal objectivo analisar as potencialidades do mercado da aviação chinesa que se encontra em franca expansão no âmbito do desenvolvimento do aeroporto internacional de Lisboa através de uma análise empírica baseada em modelos com dados de painel aplicados ao contexto dos transportes, nomeadamente o sector do transporte aéreo. Para além do objectivo apresentado anteri...
Constantino Lagoa: In this talk, we discuss some preliminary results on a general approach to chance constrained algebraic problems. In this type of problems, one aims at maximizing the probability of a set defined by polynomial inequalities. This class of problems is quite general and includes many problems in control systems where the system of interest is subject to stochastic disturbances and/or random unce...
Hugo Silva: Eletricidade Atmosférica e os Aerossóis. ### Suzete Marques: Caraterização, riscos e danos dos fogos florestais em Portugal. ### Fernando Afonso: Pollen Modelling in Patients with Atopic Respiratory Symptoms in the Alentejo Region. ### Ana Maria Silva: Aerossóis e Clima: investigação do Grupo de Meteorologia e Clima do CGE. ### João Teixeira Pinto: Coagulation-Fragmentation Equations. ### Pedro Serr...
Muito antes do aparecimento do Homem na Terra já vários acontecimentos geofísicos como cheias, sismos, secas, etc. ocorriam, ameaçando a fauna e flora existente então. Passado bastante tempo a presença humana transformou estes acontecimentos geofísicos em desastres/catástrofes naturais. O nosso planeta é cenário de vários processos dinâmicos como os causados por catástrofes naturais, nomeadamente o surgimento ...
In the first phase of the STATIS methodology the information is contained in a series of studies is first condensed into a symmetric matrix. Models based in the spectral analysis of their mean matrices were developped,see Areia et al.(2008). When their first engenvalue is dominant a further condensation of the information into a structure vector, with the eigenvector associated to and a sum of square of ...
É hoje consensual que os alunos transportam para a escola uma herança familiar de natureza multidimensional que pode influir, mais ou menos fortemente, na duração e na qualidade das aprendizagens, bem como nos desempenhos escolares que são alvo da sua avaliação. De facto, a literatura sociológica fala abundantemente de uma repartição desigual das probabilidades de sucesso escolar segundo os diferentes contextos...
The rapid development of science and technology as well as politic, social and economical dynamics which characterize post-modern societies, demand from educational systems a high quality education accessible to all. The main challenge of the XXI century in the educational field is not only to assure that students acquire a wide range of skills which are permanently updated, but also to guarantee the quality of...
Recognizing the crucial role of higher education for the development of nations and individuals, many countries have recently established ambitious targets for the percentage of graduates in their population by 2020. In peripheral European Union countries, however, such objectives may be difficult to attain. In fact, both the current stringent fiscal consolidation processes and the overall depressed...
In this paper we present models for symmetric stochastic matrices showing how to adjust and validate them. We discuss the validation in the general case
The aim of this paper is to extend one-way random effects ANOVA to situations in which we can not previously know the sample sizes. In this case it is more appropriate to consider the sample sizes as realizations of random variables. We will obtain the distribution of the F-tests, which has random degrees of freedom for the errors. Moreover we will show the equivalence between two expressions for the F-tests.
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