Improvement of surface water quality variables modelling that incorporates a hydro-meteorological factor: a state-space approach

In this work it is constructed a hydro-meteorological factor to improve the adjustment of statistical time series models, such as state space models, of water quality variables by observing hydrological series (recorded in time and space) in a River basin. The hydro-meteorological factor is incorporated as a covariate in multivariate state space models fitted to homogeneous groups of monitoring sites. Additionally, in the modelling process it is considered a latent variable that allows incorporating a structural component, such as seasonality, in a dynamic way

Application of Change-Point Detection to a Structural Component of Water Quality Variables

In this study, methodologies were developed in statistical time series models, such as multivariate state-space models, to be applied to water quality variables in a river basin. In the modelling process it is considered a latent variable that allows incorporating a structural component, such as seasonality, in a dynamic way and a change-point detection method is applied to the structural component in order to identify possible changes in the water quality variables in consideration

Using udometric network data to estimate an environmental covariate

Manyhydrologicalandecologicalstudiesrecognizetheimportanceofcharacterizingthetemporalandspatialvari- ability of precipitation. In this study, geostatistical methodologies were developed in order to estimate a hydro-meteorological factor by (re)building the space-time distribution of the precipitation associated to monthly averages in a certain hydrological river basin that will be used in the modelling of surface water quality. A hydro-meteorological factor is constructed for each water quality monitoring site (WQMS), based on the analysis of the space-time behaviour of the precipitation observed in an udometric network located in a Portuguese river basin

Fast, parallel and secure cryptography algorithm using Lorenz's attractor

A novel cryptography method based on the Lorenz's attractor chaotic system is presented. The proposed algorithm is secure and fast, making it practical for general use. We introduce the chaotic operation mode, which provides an interaction among the password, message and a chaotic system. It ensures that the algorithm yields a secure codification, even if the nature of the chaotic system is known. The algorithm has been implemented in two versions: one sequential and slow and the other, parallel and fast. Our algorithm assures the integrity of the ciphertext (we know if it has been altered, which is not assured by traditional algorithms) and consequently its authenticity. Numerical experiments are presented, discussed and show the behavior of the method in terms of security and performance. The fast version of the algorithm has a performance comparable to AES, a popular cryptography program used commercially nowadays, but it is more secure, which makes it immediately suitable for general purpose cryptography applications. An internet page has been set up, which enables the readers to test the algorithm and also to try to break into the cipher in

Política de defesa do Brasil

Comunicação proferida pelo Tenente-Brigadeiro-do-Ar Marco Gonçalves Mendes, no IDN no dia 23 de Março de 2010, no âmbito do ciclo de conferências intitulado Visões Globais para a Defesa

(Des)apoio judiciário

O presente texto corresponde à intervenção proferida na conferência intitulada “Processos Judiciais em Tempos de Crise (Ainda existe tutela judicial efetiva?)”,a qual teve lugar na Escola de Direito da Universidade do Minho, no dia 16 de outubro de 2015. Partindo de uma análise prévia, em sede de direito comparado, dos sistemas de apoio judiciário vigentes em alguns ordenamentos jurídicos europeus, este artigo visa, essencialmente, analisar o regime jurídico do apoio judiciário vigente no nosso ordenamento, propondo-se, a final, algumas medidas de reforma desse regime

Providências cautelares conservatórias: Questões práticas atuais

Partindo da análise da jurisprudência proferida na vigência do novo Código de Processo Civil, bem como do seu confronto com a jurisprudência produzida no domínio da legislação processual civil revogada e com a doutrina, o presente texto procura abordar, numa visão essencialmente prática, algumas questões e problemas atuais concernentes à tutela cautelar conservatória especificada e comum.info:eu-repo/semantics/draf

Responsabilidade patrimonial dos cônjuges e penhora de bens comuns do casal

O presente texto corresponde à intervenção proferida no dia 30 de setembro de 2016, na Escola de Direito da Universidade do Minho, nas “Jornadas internacionais no âmbito da comemoração dos 50 anos do Código Civil Português”. Nele procura-se analisar em que medida os regimes da responsabilidade pelas dívidas dos cônjuges e da penhora de bens comuns do casal se adequam ou não à realidade sócio-económica e familiar atual

Integração judiciária e tutela jurisdicional dos interesses económicos e sociais

O presente texto procura analisar os principais desafios que se colocam atualmente em matéria de integração judiciária e proteção da tutela jurisdicional efetiva, particularmente no que diz respeito à competência judiciária, reconhecimento e execução de decisões em matéria civil e comercial, bem como à citação e notificação de atos judiciais e extrajudiciais. Assim, partindo da identificação prévia de alguns problemas que se colocam no domínio da proteção da segurança jurídica, serão apresentadas propostas de alterações legislativas no sentido de se garantir de forma plena a integração judiciária e a tutela jurisdicional efetiva na União Europeia.This text seeks to analyze the main challenges currently facing judicial integration and the effective judicial protection, in particular as regards jurisdiction and the recognition and enforcement of judgments in civil and commercial matters, as well as citation and notification of judicial and extrajudicial acts. Therefore , starting from the preliminary identification of some problems regarding the legal security protection , will be made proposals for legislative changes to ensure full judicial integration and effective judicial protection in the European Unioninfo:eu-repo/semantics/draf