IDMEC Polo FEUP

Porto, Portugal

IDMEC Polo FEUP

Porto, Portugal
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Pinheiro E.,Telecommunications Institute of Portugal | Postolache O.,Telecommunications Institute of Portugal | Girao P.,Telecommunications Institute of Portugal | Mendes J.,IDMEC Polo FEUP | And 2 more authors.
Conference Record - IEEE Instrumentation and Measurement Technology Conference | Year: 2011

Assessing the cardiovascular status of subjects accompanied by physical therapists is a growing tendency. Merely assessing kinetic recovery is considered to be a short-range approach. So, techniques and devices providing extended support of physiotherapy sessions are necessary. The system developed provides to the physiotherapist new tools, by implementing unobtrusive sensing hardware and an interactive graphical user interface. It allows cardiovascular data recording during the appointment, access and management of a number of cardiac and kinetic parameters. Ballistocardiography and impedance plethysmography were used for cardiovascular parameters assessment. The intensity of the movements produced by the limited mobility arm is qualified and quantified by accelerometry. This system acts as an interactive platform to assist physiotherapists' work. It is an improvement over the traditional untraceable methods based on mere observation, and allowing comfortable cardiac and kinetic monitoring. © 2011 IEEE.


Berdich K.,Polytechnic University of Timişoara | Gentil F.,University of Porto | Gentil F.,WIDEX Lda | Parente M.,IDMEC Polo FEUP | And 7 more authors.
Computer Methods in Biomechanics and Biomedical Engineering | Year: 2015

This work presents a biomechanical study of myringosclerosis (MS), an abnormal condition of the ear that produces calcification of the lamina propria of the eardrum. The study researched the transfer of sound to the stapes depending on the localization, dimension and calcification degree of the MS plaques. Results were obtained using a validated finite element model of the ear. The mechanical properties of the lamina propria were modified, in order to model MS plaques, using the rule of mixtures for particle composites considering that the plaques are made of hydroxyapatite particles in a matrix of connective tissue. Results show that the localization and dimension of the plaques are a factor of higher importance than calcification for loss of hearing through MS. The mobility of the stapes decreased with the presence of larger plaques and also when the tympanic annulus and the area of the handle of the malleus were involved. © 2015 Taylor & Francis


Berdich K.,Polytechnic University of Timişoara | Gentil F.,University of Porto | Gentil F.,WIDEX Lda | Parente M.,IDMEC Polo FEUP | And 6 more authors.
Computer Methods in Biomechanics and Biomedical Engineering | Year: 2016

This work presents a biomechanical study of myringosclerosis (MS), an abnormal condition of the ear that produces calcification of the lamina propria of the eardrum. The study researched the transfer of sound to the stapes depending on the localization, dimension and calcification degree of the MS plaques. Results were obtained using a validated finite element model of the ear. The mechanical properties of the lamina propria were modified, in order to model MS plaques, using the rule of mixtures for particle composites considering that the plaques are made of hydroxyapatite particles in a matrix of connective tissue. Results show that the localization and dimension of the plaques are a factor of higher importance than calcification for loss of hearing through MS. The mobility of the stapes decreased with the presence of larger plaques and also when the tympanic annulus and the area of the handle of the malleus were involved. © 2015 Taylor & Francis.


Andrade T.F.,IDMEC Polo FEUP | Deaky B.-A.,Transilvania University of Brasov | Restivo M.T.,University of Porto | Quintas M.R.,University of Porto
2013 International Conference on Interactive Collaborative Learning, ICL 2013 | Year: 2013

The technological advances and the need to provide all students with proper learning lead to a globally increased number of remotely accessible laboratories. However, the usual hardware solutions, which involve using PCs to query the data acquisition hardware and to publish the data online, have a set of drawbacks. When grouping several remote experiments in a room which is shared with working people, the living conditions are degraded. Crowding and overheating (mainly in the summer) are two problems that need to be solved. This paper presents the authors' efforts and solution to reduce the online laboratory space requirements and heating conditions by using modern technologies for implementing the online laboratories. © 2013 IEEE.


Correia J.A.F.O.,IDMEC Polo FEUP | De Jesus A.M.P.,IDMEC Polo FEUP | De Jesus A.M.P.,University of Trás os Montes e Alto Douro | Fernandez-Canteli A.,University of Oviedo
Engineering Structures | Year: 2013

Traditionally, fatigue crack initiation has been modelled based on strain-life relations whereas fatigue crack propagation has been modelled using fracture mechanics concepts. Recently, new fatigue crack growth models, based on elastic-plastic stress-strain histories at the crack tip region, along with strain-life damage models have been proposed, which constitutes a class of local fatigue crack propagation models. Therefore, a unified local approach is feasible to model both crack initiation and crack propagation. An application of such a unified local approach to fatigue is presented in this paper. In particular, a notched rectangular plate, made of P355NL1 steel is modelled in order to generate S-. N curves for distinct stress R-ratios. The predictions are compared with available experimental data. The required strain-life data of the P355NL1 steel is also presented in the paper, in a probabilistic form, using adequate fatigue damage parameters. Finally, the probabilistic S-. N field is proposed for the notched detail and a good correlation of the available experimental data is observed. © 2013 Elsevier Ltd.


De Castro P.M.S.T.,IDMEC Polo FEUP | Camanho P.P.,IDMEC Polo FEUP | Da Silva L.F.M.,IDMEC Polo FEUP | Moreira P.M.G.P.,IDMEC Polo FEUP
International Journal of Structural Integrity | Year: 2010

Purpose - The purpose of this paper is to describe the work of IDMEC, a not-for-profit R&D private association located in Porto and Lisbon, Portugal. Design/methodology/approach - The paper focuses on IDMEC's R&D activities, focusing on aeronautics. Findings - Together IDMEC-Porto and INEGI provide answers to R&D challenges in the broad area of aerostructures, from fracture and fatigue problems to advanced composites for space applications. Originality/value - The paper offers a concise presentation of the IDMEC's R&D activities in the field of aeronautics. © Emerald Group Publishing Limited.

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