3121728 documents found, page 311689 of 312173
Resistência ao fogo de blocos de betão leve à base de caroço de espiga de milho
Faustino, Jorge; Alves, Nuno; Piloto, P.A.G.; Ferreira, Débora; Fonseca, E.M.M.; Silva, Elisabete Cristina Cruz; Soares, Salviano; Pinto, JorgeEstudos recentes indicam que o caroço da espiga de milho tem algumas propriedades interessantes, das quais se destacam a leveza e o bom desempenho em termos de capacidade de isolamento térmico e acústico. Neste trabalho de investigação, o caroço da espiga de milho é proposto como agregado no fabrico de blocos de betão leve. Para o efeito, o caroço da espiga de milho é granulado previamente. Posteriormente, as p...
Description of a new servo motor optimized for educational robotic applications
Silva, João; Costa, Paulo Gomes da; Gonçalves, JoséIn this paper it is described a new Servo Motor Optimised for Educational Robotic Applications (SMORA), which comprises several sensors and higher level addressing/ communication capabilities. Even though servos have excellent qualities when used in the field of robotics, several properties can still be enhanced. These devices are known to have nonlinear properties and dynamic factors such as dead-zones, backla...
Características al sacrificio de canales de “cabrito transmontano”
Teixeira, Alfredo; Fernandes, B.; Rodrigues, SandraThe aim of this paper is to contribute to a better understanding of the butcher characteristics of the type of animal commercialized. This study used the database of the National Association of Raza Serrana Caprinicultores (ANCRAS) between 1998 and 2009, for live weight, carcass weight and killing-out percentage. The main selling season of kids is for the months of February to May to coincide with Carnival and ...
Comprensión de sistemas paralelos
Perez, Norma; Berón, Mario; Henriques, Pedro Rangel; Pereira, Maria JoãoLas Tecnologías de la Información y la Comunicación (TIC’s) ofrecen servicios sorprendentes, que proporcionan acceso permanente a todo tipo de información y aplicaciones que se encuentran alrededor del mundo. En particular, los sistemas paralelos son buenos ejemplos de los paradigmas emergentes que deben ser considerados por científicos que se desempeñan en el campo informático. Estos sistemas plantean activida...
Nutritional value of wild and domesticated Sanguisorba minor Scop. plant
Ceccanti, Costanza; Finimundy, Tiane C.; Barros, LillianSanguisorba minor Scop. is a wild edible species distributed in the Mediterranean area and present in numerous traditional food recipes. In the present study, the assessment of nutritional value (ash, carbohydrates, fat, proteins, energy, free sugars, organic acids, tocopherols, fatty acid composition, and minerals) of wild and domesticated S. minor plants was performed. Results showed an increase in ash, prote...
Numerical simulation of the fire resistance of composite slabs with steel deck
Piloto, P.A.G.; Prates, Lucas; Balsa, Carlos; Rigobello, RonaldoThis investigation is related with the fire resistance of composite slabs with steel deck. This composite solution consists of a concrete topping cast on the top of a steel deck. The concrete is typically reinforced with a steel mesh and may also contain individual rebars. The deck also acts as reinforcement and may be exposed to accidental fire conditions from the bottom. This composite solution is widely used...
Uso de bioestimulantes vegetais no setor dos frutos secos
Rodrigues, M.A.; Correia, Carlos M.; Arrobas, MargaridaUma gama variada de produtos é hoje comercializada como "bioestimulante" vegetal. Um bioestimulante vegetal é um produto que contém substâncias e/ou microrganismos cuja função é estimular processos naturais que beneficiem a absorção e a eficiência de uso de nutrientes, a tolerância a stresses abióticos, bióticos e/ou a qualidade dos produtos. A União Europeia reconheceu recentemente os bioestimulantes como uma ...
Properties and applications of PDMS for biomedical engineering: a review
Miranda, Inês; Souza, Andrews Victor Almeida; Sousa, Paulo; Ribeiro, J.E.; Castanheira, Elisabete M.S.; Lima, Rui A.; Minas, GraçaPolydimethylsiloxane (PDMS) is an elastomer with excellent optical, electrical and mechanical properties, which makes it well-suitable for several applications such as microfluidic and pho-tonics in several areas. Due to its biocompatible feature, PDMS is widely used for biomedical purposes. This widespread led also to the massification of the soft-lithography technique, intro-duced for facilitating the rapid p...
Dynamics of a fixed bed adsorption column in the kinetic separation of hexane i...
Mendes, Patrícia A.P.; Rodrigues, Alírio; Almeida, João P.; Silva, José A.C.A fixed bed adsorption mathematical model has been developed to de- scribe the kinetic separation of hexane isomers when they flow through a packed bed containing the microporousMetal-Organic Framework (MOF) ZIF-8 adsorbent. The flow of inert and adsorbable species through the fixed bed is modeled with fun- damental differential equations according to the mass and heat conservation laws, a general isotherm to d...
Reconfigurable conveyor transfer system using IEC-61499 function blocks
Mendonça, LeonardoIn the 4th Industrial Revolution era, automation processes operate in a more modular, flexible, and reconfigurable manner, leveraging decentralized decision-making and distributed control. As the backbone of this revolution lies the Cyber-physical Production System (CPPS) concept, which emphasizes the strong interlink and interdependence of the digital/cyber and physical components. It requires the use of a tec...