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- Filipe Moura
- 2001

We write an action, in four dimensional N = 1 curved superspace, which contains a pure R term with a coupling constant. Starting from the offshell solution of the Bianchi identities, we compute the on-shell torsions and curvatures with this term. We show that their complete solution includes, for some of them, an infinite series in the R coupling constant,… (More)

- Filipe Moura, Chen Yang
- 2002

We fully compute the N = 1 supersymmetrization of the fourth power of the Weyl tensor in d = 4 x-space with the auxiliary fields. In a previous paper, we showed that their elimination requires an infinite number of terms; we explicitely compute those terms to order κ (three loop). We also write, in superspace notation, all the possible N = 1 actions, in… (More)

- Filipe Moura
- 2002

We write in superspace the lagrangian containing the fourth power of the Weyl tensor in the ”old minimal” d = 4, N = 2 supergravity, without local SO(2) symmetry. Using gauge completion, we analyze the lagrangian in components. We find out that the auxiliary fields which belong to the Weyl and compensating vector multiplets have derivative terms and… (More)

- Filipe Moura
- 2007

We analyze the reduction to four dimensions of the R4 terms which are part of the ten-dimensional string effective actions, both at tree level and one loop. We show that there are two independent combinations of R4 present, at one loop, in the type IIA four dimensional effective action, which means they both have their origin in M-theory. The d = 4… (More)

- Filipe Moura
- 2007

In a previous article we have shown 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. It had been shown that such a term could not be directly supersymmetrized, but we showed that was possible after coupling to a… (More)

- Filipe Moura
- 2008

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)

- Filipe Moura
- 2006

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)

- Filipe Moura
- 2006

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)

- Filipe Moura
- 2008

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)

- Carlos Roque, Filipe Moura, João Lourenço Cardoso
- Accident; analysis and prevention
- 2015

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)