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Repeated Electrical Resistivity Tomographies in a CALM Site in Livingston Islan...
Correia, António M.; Rocha, João; Vieira, GonçaloDuring the years of 2009, 2012, and 2013 several electrical resistivity tomographies (ERTs) were done in a CALM (Circumpolar Active Layer Monitoring) site near the Bulgarian Antarctic Base of St. Kliment Ohridski. The main objective of the ERTs was to try to identify permafrost zones and their extension, as well as their time and space evolution. Geoelectrical methods, in particular ERTs, are very useful for pe...
An application of the SIR model to the evolution of epidemics in Portugal
Correia, António M.; Mena, Filipe C.; Soares, A. J.We apply the SIR model to study the evolution of Measles and Hepatitis C in Portugal using data from 1996 until 2007. Our results are potentially interesting to forecast the evolution of those viruses in subsequent years.
Buckling of steel and composite steel and concrete columns in case of fire
Correia, Antonio M.; Rodrigues, João Paulo C.Bare steel columns are known to have a very low fire resistance. The high thermal conductivity and the sudden decrease of the steel yield stress and Young Modulus in function of the temperature are responsible for this behaviour. The purpose of this study is to compare different modes of failure of building steel columns. The buckling of the columns is strongly influenced by the contact with other elements such...
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