5 documents found, page 1 of 1
Active Flow Control using Dense Wireless Sensor and Actuator Networks
Robles, Ramiro; Viana, Júlio; Loureiro, João; Cintra, João; Rocha, André; Tovar, EduardoThis paper describes the design of an active flow control (AFC) system for aeronautics applications based on dense wireless sensor and actuator networks (WSANs). The objective of this AFC system is to track gradients of pressure (or wall shear stress) across the surface of the fuselage of commercial aircraft. This collected information is used to activate a set of actuators that will attempt to reduce the skin ...
Active Flow Control for Aerospace Operations by means of a Dense Wireless Senso...
Robles, Ramiro; Loureiro, João; Tovar, Eduardo; Viana, Júlio; Cintra, João; Rocha, AndréThis paper presents the design of an active flow control (AFC) system for commercial aircraft based on a dense wired/wireless sensor and actuator network. The goal is to track gradients of pressure across the surface of the fuselage of commercial aircraft. This collected information will be used to activate a set of actuators that will attempt to reduce the skin drag effect produced by the separation between la...
Solid-state low-temperature extrusion of P3HT ribbons
Bernardo, Gabriel; Nabankur, Deb; Pereira, Paulo; Brandão, Lúcia; Viana, Júlio; Bucknall, David G.Ribbons of poly(3-hexylthiophene) (P3HT) 0.15 and 0.30 mm thickness were extruded at the temperatures of 200 and 250 C, i.e., below and above the melting temperature of P3HT (~240 C), using a small homemade extrusion device. The ribbons produced by this method are continuous and freestanding. WAXS results show that all the extruded samples are more crystalline than the original powder, and the different process...
Solventless processing of conjugated polymers - a review
Brandão, Lúcia; Viana, Júlio; Bucknall, David G.; Bernardo, GabrielThe molecular mobility of polymers in their solid or molten states allows their processing without the need for toxic, “non-friendly” solvents. In this work, the main features of solvent-free processing methods applied to conjugated polymers are reviewed taking into consideration that these materials are largely used in a broad range of (opto-)electronic applications, including organic field-effect transistors,...
O papel das novas tecnologias na comunicação externa da organização : o caso TA...
Viana, JúlioDissertação de Mestrado em Ciências da Comunicação – Área de Especialização em Comunicação Estratégica; O desenvolvimento das tecnologias de informação e comunicação (TIC) esteve no centro das principais evoluções económicas e financeiras ao longo da segunda metade do século XX. No entanto, a adopção de novas tecnologias no contexto organizacional veio não só transformar a sua composição e estrutura interna de ...