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Analysis of discrete-valued time series
Isabel Maria SilvaDiscrete-valued time series are common in practice, yet methods for their analysis have been developed only recently. The fact that the variables take values on a finite or countably infinite set renders the traditional representations of dependence either impossible or impractical. Several models for stationary processes with discrete marginal distributions have been proposed. The first part of this book is co...
Um novo olhar sobre o método de leitura João de Deus: apresentação de um suport...
Ruivo, Isabel Maria SilvaEste trabalho de investigação pretende abordar a temática da leitura, tentando encontrar os factores que contribuem para o desenvolvimento desta competência e, através do estudo profundo do Método de Leitura João de Deus, desenvolver um projecto interactivo que efectivamente seja fomentador de boas práticas, visando o envolvimento de alunos, pais e professores, condição sem a qual julgamos difícil transpor a ba...
Time Dependent Clustering of Time Series
Joaquim Costa; Isabel Maria Silva; Eduarda SilvaIn this work we consider the problem of clustering time series. Contrary to other works on this topic, our main concern is to let the most important observations, for instance the most recent, have a larger weight on the analysis. This is done by defining similarities measures between two time series, based on Pearson's correlation coefficient, which uses the notion of weighted mean and weighted covariance, whe...
Copy paste design's
Martins, João Carlos Monteiro; Pinto, Isabel Maria Silva; Sousa, Álvaro José Barbosa deThe present study presents an alternative perspective to the designer's role in our current society, in which the development of a new product is not an end in itself, but a means by which one can disseminate other values that are higher than those directly linked to the culture of material. The part played by the effect of products is symbolic in the economic interchange and intends to be cancelled by the digi...
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