Polytechnic Institute of Viseu

About: Polytechnic Institute of Viseu is a education organization based out in Viseu, Portugal. It is known for research contribution in the topics: Population & Agriculture. The organization has 392 authors who have published 989 publications receiving 14134 citations. The organization is also known as: IPV.

Complications of fluidotherapy in patients with acute pancreatitis: A contribution

Abstract: Introduction: Aggressive fluid therapy is frequently suggested in the treatment of acute pancreatitis. However, there is some controversy about the effect of this therapy concerning the development of clinical complications and the need for surgery. Objectives: To explore the relationship between fluid administration in the first 48 hours and the development of local or systemic complications, to contribute to clarifying some open questions on this subject. Methods: This study is based on records of 109 patients admitted to the Surgical High Dependency Unit of Tondela Viseu Hospital Centre, between 2007 and 2012, with the diagnosis of acute pancreatitis. Data were explored, and statistical tests were used to identify variables that differentiate patients with complications. Receiver operating characteristic (ROC) curves allowed to relate the amount of fluids at 48 hours with the occurrence of each complication. Logistic regression models were used to identify independent risk factors for each complication. Results: There was no significant relationship between fluid therapy at 48 hours with death nor with the occurrence of systemic complications. As opposed, fluid therapy at 48 hours revealed to be associated with local and late complications, presence of infection and need for surgery. Conclusion: High levels of fluid therapy in the first 48 hours were associated with the development of complications.

Avaliação físico-química e sensorial da pêra passa de Viseu secada por diferentes metodologias.

Abstract: Resumo A pera de S. Bartolomeu (Pyrus communis L.) e um produto tradicional da regiao de Viseu comercialmente designada de “Pera Passa de Viseu” e que, presentemente, e secado ao ar livre. De modo a substituir esse processo de secagem artesanal sem alterar as caracteristicas tipicas do produto ao nivel organoleptico, foram testadas metodologias alternativas, designadamente, estufa solar de conveccao forcada, realizada na Escola Superior Agraria de Viseu (ESAV); estufa solar de conveccao natural, na Escola Superior de Tecnologia de Viseu (ESTV) e secador em tunel, na Universidade de Coimbra (UC). Os produtos secados pelas varias metodologias foram analisados ao nivel fisico-quimico e sensorial nos seguintes parâmetros: cor, textura (dureza e elasticidade), acidez e acucares totais. Os resultados obtidos foram submetidos a uma analise estatistica multivariada em componentes principais (SPSS, versao 18), tendo as 2 componentes principais explicado 73% da variacao total. O eixo 1 e descrito essencialmente pela variavel da cor e o eixo 2 pela dureza. Na projeccao das metodologias no plano definido pelas duas componentes principais verificou-se que o produto secado em tunel apresentava caracteristicas diferentes das restantes metodologias de secagem, principalmente por apresentar uma cor mais amarelada e nao o vermelho-castanho tradicional da pera passa de Viseu. No que respeita a dureza, as peras secadas pela estufa solar de conveccao natural apresentavam uma dureza menor. Este trabalho permitiu concluir que e possivel substituir a secagem tradicional da pera passa de Viseu por outras metodologias. A estufa solar de conveccao forcada foi a que apresentou melhores resultados.

Experimental apparatus for vibration analysis in robotics

Abstract: Robotic systems use different types of sensors both in control and in environment perception. Those sensors can be digital encoders, tachometers, accelerometers, force sensors, current sensors and many others. In this paper an experimental setup is presented to study vibrations and impacts. The system acquires data from the sensors, in real time, and, in a second phase, processes it through an analysis package. Several examples with experimental results are carried out showing the functionalities of the developed apparatus.