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Networked embedded systems for active flow control in aircraft

Tovar, Eduardo; Pereira, Nuno; Bate, Iain; Indrusiak, Leandro; Penna, Sérgio; Negrão, José; Viana, Júlio C.; Philipp, François; Mayer, Dirk; Heras, José

Aerodynamic drag is known to be one of the factors contributing more to increased aircraft fuel consumption. The primary source of skin friction drag during flight is the boundary layer separation. This is the layer of air moving smoothly in the immediate vicinity of the aircraft. In this paper we discuss a cyber-physical system approach able of performing an efficient suppression of the turbulent flow by using...

Data: 2012 | Origem: Repositório Científico do Instituto Politécnico do Porto

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Sealer penetration and marginal permeability after apicoectomy varying retrocav...

Winik,Renata; Araki,Ângela Toshie; Negrão,José Augusto Alves; Bello-Silva,Marina Stella; Lage-Marques,José Luiz

Apicoectomy failure is generally related to inappropriate marginal sealing of the retrocavity, which allows percolation of microorganisms and their products from root canal system to periapex. This study evaluated tubular penetration of canal sealers and marginal permeability after retrocavity irradiation with Er;Cr:YSGG laser and retrofilling with MTA or cyanoacrylate. Twenty-two single-rooted teeth were decor...

Data: 2006 | Origem: OASIS br

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