Filipe Moura

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We review our recent work on the existence of a new independent R4 term, at one loop, in the type IIA and heterotic effective actions, after reduction to four dimensions, besides the usual square of the Bel-Robinson tensor. We discuss its supersymmetrization. 1 R4 terms in ten dimensions The superstring α effective actions contain two independent terms X,Z(More)
We develop the perturbation theory for R2 string-corrected black hole solutions in d dimensions. After having obtained the master equation and the α-corrected potential under tensorial perturbations of the metric, we study the stability of the Callan, Myers and Perry solution under these perturbations. Present address: Instituto Superior Técnico,(More)
We review our recent works on the supersymmetrization of the leading string correction (the R term) to N = 1, 2 supergravity theories in four dimensions. We show that, in the ”old minimal” formulations of these theories, when going on-shell in the presence of this correction, the auxiliary fields which come from multiplets with physical fields cannot be(More)
We review our recent works on the supersymmetrization of the leading string correction (the R term) to N = 1, 2 supergravity theories in four dimensions. We show that, in the ”old minimal” formulations of these theories, when going on-shell in the presence of this correction, the auxiliary fields which come from multiplets with physical fields cannot be(More)
The objective of this paper is to study the contributors influencing ran-off-road (ROR) crash severities in a setting that has not been analysed in the literature, namely on freeways not designed according to the "forgiving roadside" concept. To accomplish the analysis, ROR crash data were collected on freeway road sections in Portugal and multinomial and(More)