Induced higher-derivative massive gravity on a 2-brane in 4D Minkowski space

In this paper we revisit the problem of localizing gravity in a 2-brane embedded in a 4D Minkowski space to address induction of high derivative massive gravity. We explore the structure of propagators to find well-behaved higher-derivative massive gravity induced on the brane. Exploring a special case in the generalized mass term of the graviton propagator we find a model of consistent higher order gravity with an additional unitary massive spin-2 particle and two massless particles: one spin-0 particle and one spin-1 particle. The condition for the absence of tachyons is satisfied for both `right' and `wrong' signs of the Einstein-Hilbert term on the 2-brane. We also find the Pauli-Fierz mass term added to the new massive gravity in three dimensions and recover the low dimensional DGP model.Comment: Latex, 12 pages, no figure; refs added, version to appear in PL

Food supplements for weight loss: monitoring of metallic and non-metallic impurities

Poster presented at the 37th ESPEN Congress (European Society for Clinical Nutrition). 5-8 September 2015, Lisbon, Portuga

Analysis of elemental impurities by WDXRF in pharmaceuticals and dietary supplements

Poster presented at the Colloquium Spectroscopicum Internationale XXXIX. 30 Aug - 3 Sept 2015, Figueira da Foz, Coimbra, PORTUGA

Aplicador portátil de produtos químicos via agua de irrigação.

A "Quimigação" - aplicação de produções químicos via água de irrigação - promove inúmeros benefícios, entre eles, redução no custo, aumento da eficiência de aplicação, maior flexibilidade nas operações culturais, maior segurança e redução da contaminação do meio ambiente. O desenvolvimento de um aplicador portátil de produtos químicos baseou-se na equação de energia e no tubo de Pitot.- É apresentado o protótipo do equipamento em sua forma simples, robusta, e também um exemplo de seu desempenho para o caso de um sistema de aspersão com laterais portáteis

Aplicador portátil de produtos químicos via água de irrigação.

Principios basicos de funcionamento; Descricao do modelo; Operacao; Resultados e discussao.bitstream/item/37448/1/circ-13-1.pd

Braneworld solutions from scalar field in bimetric theory

We investigate the presence of braneworld solutions in a bimetric theory, with gravity and the scalar field coupling differently. We consider a non-standard model, with a Cuscuton-like scalar field, and we show how to generate braneworld solutions in this new scenario. In particular, we found no gravitational instabilities for the braneworld solutions.Comment: 8 pages, no figures, Latex. Version to appear in PR

Nitrogen removal in a Sequencing Batch Biofilm Reactor : effect of carbon availability and intermittent aeration

This study aimed to investigate the effects of carbon availability and intermittent aeration on nitrogen removal in a Sequencing Batch Biofilm Reactor (SBBR). The percentage of nitrogen removal in the SBBRs operating with dump fill and slow fill with optimum intermittent aeration was quite similar, 75.7% and 69.2%, respectively, indicating that intermittent aeration allowed a considerable energy saving without compromising significantly nitrogen removal. Accumulation of storage polymers by heterotrophic bacteria was only observed in the dump fill mode of operation. FISH analyses of the biofilm indicated that ammonia-oxidisers belonged to the beta-subclass Proteobacteria and nitrite-oxidisers were affiliated with the genus Nitrospira.Fundo Europeu de Desenvolvimento Regional (FEDER)Fundação para a Ciência e a Tecnologia (FCT