Time filter

Source Type

Castelo Branco, Portugal

The Polytechnic Institute of Castelo Branco is a state-run polytechnic institute of higher education, comprising schools of agriculture, technology, management, education, art and health. It is located in Castelo Branco, Portugal. The first two schools of this institution opened in 1982 - Escola Superior Agrária and 1985 - Escola Superior de Educação . Wikipedia.

Pires D.,Polytechnic Institute of Castelo Branco | Cruz E.B.,Polytechnic Institute of Setubal | Caeiro C.,Polytechnic Institute of Setubal
Clinical Rehabilitation | Year: 2015

Objective: The aim of this study was to compare the effectiveness of a combination of aquatic exercise and pain neurophysiology education with aquatic exercise alone in chronic low back pain patients. Design: Single-blind randomized controlled trial. Setting: Outpatient clinic. Subjects: Sixty-two chronic low back pain patients were randomly allocated to receive aquatic exercise and pain neurophysiology education (n = 30) or aquatic exercise alone (n = 32). Interventions: Twelve sessions of a 6-week aquatic exercise programme preceded by 2 sessions of pain neurophysiology education. Controls received only 12 sessions of the 6-week aquatic exercise programme. Main measures: The primary outcomes were pain intensity (Visual Analogue Scale) and functional disability (Quebec Back Pain Disability Scale) at the baseline, 6 weeks after the beginning of the aquatic exercise programme and at the 3 months follow-up. Secondary outcome was kinesiophobia (Tampa Scale of Kinesiophobia). Results: Fifty-five participants completed the study. Analysis using mixed-model ANOVA revealed a significant treatment condition interaction on pain intensity at the 3 months follow-up, favoring the education group (mean SD change: -25.4± 26.7 vs -6.6 ± 30.7, P < 0.005). Although participants in the education group were more likely to report perceived functional benefits from treatment at 3 months follow-up (RR=1.63, 95%CI: 1.01-2.63), no significant differences were found in functional disability and kinesiophobia between groups at any time. Conclusions: This studys findings support the provision of pain neurophysiology education as a clinically effective addition to aquatic exercise. © 2014 The Author(s). Source

Alegria C.,Polytechnic Institute of Castelo Branco | Tome M.,University of Lisbon
European Journal of Forest Research | Year: 2011

The study purpose selected among several candidate models for best individual tree, over bark, total volume model, volume ratio model to any top height limit and taper model for maritime pine (Pinus pinaster Aiton) in the regions of Pinhal Interior Sul and Beira Interior Sul, Portugal. The data used in the study were collected from 144 felled trees, corresponding to 995 diameter/height measurements. To select among the best models, several statistics were computed during model fitting, and the independent validation procedure was used to evaluate model fitting, collinearity and prediction performance. A ranking index was used to support the final decision. The analysis of models studentized residuals distribution showed that some regression model assumptions, such as normality and homogeneity, were not met. To overcome this unideal situation, the models selected were then fitted again using robust regression and weighted regression techniques. The set of adjusted models will allow the prediction of individual tree, over bark, total volume and merchantable volume to any merchantable limit, for both species and region to support management decisions. © 2011 Springer-Verlag. Source

Fernandes N.O.,Polytechnic Institute of Castelo Branco | Carmo-Silva S.,University of Minho
International Journal of Production Economics | Year: 2011

Workload control is a production planning and control concept specifically designed for complex manufacturing environments. Past research on Workload control has been essentially focused on discrete order release. This means that release of orders to the shop floor takes places on a periodic basis. Continuous order release has been somehow neglected, in spite of its apparent potential for improving system performance, including the reduction of order flow times. This paper presents a simulation study of this order release approach. The study contributes for improving the basis for setting workload norms, selecting the workload control strategy and deciding upon routing alternatives under continuous order release. © 2010 Elsevier B.V. All rights reserved. Source

Fernandes N.O.,Polytechnic Institute of Castelo Branco | Carmo-Silva S.,University of Minho
International Journal of Production Research | Year: 2011

In this paper, we report a simulation study on the role of sequence-dependent set-up times in decision making at the order release level of a workload controlled make-to-order flow-shop. The study evaluates the potential for set-ups savings, dependent on the level of workload in the shop, for two alternative strategies, namely considering set-up times centrally, within the release decision or locally, within the dispatching decision. These strategies are compared and assessed on the basis of two main performance measures namely time in system and standard deviation of the job lateness. Results indicate that the local strategy, which has been traditionally adopted in practice and in most of the studies dealing with sequence-dependent set-up times, does not always give the best results. The release frequency and the shop workload appear critical to the selection of the strategy to adopt, strongly influencing system performance. © 2011 Taylor & Francis. Source

Dias A.M.P.G.,University of Coimbra | Jorge L.F.C.,Polytechnic Institute of Castelo Branco
Engineering Structures | Year: 2011

The load-carrying capacity and ultimate deformation capacity of timber-concrete composite systems can be significantly influenced by the ductility of the connection between the two materials. The use of more ductile connections can increase the load-carrying capacity of the composite system as well as its ultimate deformation capacity. In this work, the potential increase that might be expected for these two parameters due to the use of ductile connections will be assessed through numerical simulations, taking the non-linear behaviour of the connections into account.Furthermore, the connection ductility required to achieve the maximum load capacity depends on the mechanical properties of the connection as well as on the geometric and mechanical properties of the composite system. There are certain types of connections, such as notched connections, with a very brittle behaviour, for which the failure of the composite structure might be significantly influenced by connection failure, unless very small spacing between the fasteners is used. On the other hand, ductile connections such as dowel-type fasteners can be used with large spacing since their high ultimate deformation capacity is unlikely to be reached before the failure of either the concrete or the timber member. With the aim of identifying the maximum spacing that should be allowed for each specific connector type, numerical analyses were performed with the aim of identifying the maximum spacing that should be allowed for each specific connector type so as to maximize the load-carrying capacity and possibly increase the ultimate deformation capacity. © 2011 Elsevier Ltd. Source

Discover hidden collaborations