One-dimensional Model for Fluids of Third-grade in Tubes with Constant Radius

Our goal in this paper is to extend previous results obtained for Newtonian and secondgrade fluids to third-grade fluids in the case of an axisymmetric, straight, rigid and impermeable tube with constant cross-section using a one-dimensional hierarchical model based on the Cosserat theory related to fluid dynamics. In this way we can reduce the full threedimensional system of equations for the axisymmetric unsteady motion of a non-Newtonian incompressible third-grade fluid to a system of equations depending on time and on a single spatial variable. Some numerical simulations for the volume flow rate and the the wall shear stress are presented.

Mathematics and fiber arts

Mathematics can be found all over the world, even in what could be considered an unrelated area, like fiber arts. In knitting, crochet, and counted-thread embroidery, we can find concepts of algebra, graph theory, number theory, geometry of transformations, and symmetry, as well as computer science. For example, many fiber art pieces embody notions related with groups of symmetry. In this work, we focus on two areas of Mathematics associated with knitting, crochet, and cross-stitch works – number theory and geometry of transformations.

Turismo desportivo no concelho de Évora

Na divulgação de qualquer destino turístico é necessário ter em conta diversos fatores. Esta dissertação teve como principal objetivo analisar a procura e a oferta ao nível do turismo desportivo no concelho de Évora. Foi estudado o turismo desportivo no município de Évora, que é um dos maiores destinos turísticos da região Alentejo. Aplicando questionários de maneira a saber qual a opinião dos turistas relativamente a atividades desportivas praticadas neste destino. Foram ainda realizadas duas entrevistas a responsáveis da Câmara Municipal de Évora e ao Diretor de uma empresa de Animação Turística. A falta de estratégia no sector é evidenciada pelo facto dos visitantes não apresentarem como motivação primária a prática de atividades desportivas. Sendo o Turismo e o Desporto sectores económicos de grande importância em termos globais e locais, verificou-se que no concelho de Évora o Turismo Desportivo pode ser um grande agente de desenvolvimento em diversas áreas; Abstract: Sports Tourism in Évora Municipality The disclosure of any tourist destination should be taken into account several factors. This work aimed to analise the demand and supply in terms of sports tourism in Évora municipality. An investigation was made to the city of Évora, which is one of the biggest tourist destinations in Alentejo region, applying questionnaire in order to know the opinion of tourists with regard to sports activities practiced in this destination. They were also carried out two interviews with officials of the Municipality of Évora, and the Director of a Tourism Entertainment company. The lack of strategy in the sector is demonstrated by the fact that visitors do not present as the primary motivation to practice sports activities. Tourism and Sports are sectors of great importance in global and local economy, it was found that in Évora county, Sports Tourism can be a major agent of development in several areas.