14 documents found, page 1 of 2
Elastic shear buckling coefficients for diagonally stiffened webs
Martins, J. P.; Cardoso, H.S.In this paper, the characterisation of the elastic shear buckling behaviour of simply supported plates diagonally stiffened excluding the influence of direct stresses is made. Two broad numerical parametric studies consisting of linear buckling analysis by the finite element method are performed, covering the entire practical range of critical parameters like the aspect ratio and the stiffener's mechanical prop...
Rumo à definição de ‘Product Data Templates’ nacionais para aplicação generaliz...
El Sibaii, M.; Granja, J.; Ribeiro, R. R.; Meda, P.; Resende, R.; Santos, J. dos.; Martins, P. L.; Costa, A. A.; Martins, J. P.; Azenha, M.A normalização é um dos elementos mais importantes para a implementação dos processos BIM. De facto, trata‑se de fator primordial para colaboração eficaz entre os intervenientes da indústria AECO. Um dos importantes vértices a ter em conta na normalização diz respeito à definição da informação alfanumérica relevante, bem como a sua respetiva nomenclatura. Este tipo de definições corresponde a estruturas normali...
Estimation of prevalence in rare disease using pooled samples
Martins, J. P.; Santos, R.; Felgueiras, M.The use of pooled samples for screening infected individuals is a known procedure to reduce costs. In an estimation problem, the aim is only to determine how many individuals are infected instead of determining who is infected (classification problem). In that setting, our goal was to compare the performance of using one or two-dimensional arrays. The best performance was established according to one of the fol...
IoT and blockchain paradigms for EV charging system
Martins, J. P.; Ferreira, J.; Monteiro, V.; Afonso, J. A.; Afonso, J. L.In this research work, we apply the Internet of Things (IoT) paradigm with a decentralized blockchain approach to handle the electric vehicle (EV) charging process in shared spaces, such as condominiums. A mobile app handles the user authentication mechanism to initiate the EV charging process, where a set of sensors are used for measuring energy consumption, and based on a microcontroller, establish data commu...
What makes umbilical cord tissue-derived mesenchymal stromal cells superior imm...
Bárcia, R. N.; Santos, J. M.; Filipe, M.; Teixeira, M.; Martins, J. P.; Almeida, J.; Água-Doce, A.; Almeida, S. C. P.; Varela, A.; Pohl, S.MSCs derived from the umbilical cord tissue, termed UCX, were investigated for their immunomodulatory properties and compared to bone marrow-derived MSCs (BM-MSCs), the gold-standard in immunotherapy. Immunogenicity and immunosuppression were assessed by mixed lymphocyte reactions, suppression of lymphocyte proliferation and induction of regulatory T cells. Results showed that UCX were less immunogenic and show...
Predicting the mechanical behavior of amorphous polymeric materials under strai...
Araújo, M. Carvalho; Martins, J. P.; Mirkhalaf, Mohsen; Lanceros-Méndez, S.; Pires, Francisco; Simões, RicardoPolymeric materials have become the reference material for high reliability and performance applications. However, their performance in service conditions is difficult to predict, due in large part to their inherent complex morphology, which leads to non-linear and anisotropic behavior, highly dependent on the thermomechanical environment under which it is processed. In this work, a multiscale approach is propo...
Exploring in vitro sperm characteristics and their importance in the prediction...
Oliveira, L. [UNESP]; Santos, R.; Arruda, R.; Andrade, A.; Reeb, P.; Martins, J. P.; Beletti, M.; Peres, R.; de Lima, V. H. [UNESP]Made available in DSpace on 2013-08-12T18:43:41Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-08-01; Made available in DSpace on 2013-09-30T19:16:37Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-08-01; Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T15:32:02Z No. of bitstreams: 0; Made available in DSpace on 2014-05-20T15:32:02Z (GMT). No. of bitstreams:...
Multi-scale modeling of the mechanical behavior of polymer-based materials
Araújo, Miguel Carvalho; Martins, J. P.; Mirkhalaf, Mohsen; Lanceros-Mendez, Senentxu; Pires, Francisco; Simões, RicardoPolymers have become the reference material for high reliability and performance applications. In this work, a multi-scale approach is proposed to investigate the mechanical properties of polymeric based material under strain. To achieve a better understanding of phenomena occurring at the smaller scales, a coupling of a Finite Element Method (FEM) and Molecular Dynamics (MD) modeling in an iterative procedure ...
Multi-scale modeling of the mechanical behavior of polymer-based materials
Araújo, Miguel Carvalho; Martins, J. P.; Mirkhalaf, Mohsen; Lanceros-Méndez, S.; Pires, Francisco; Simões, RicardoPolymers have become the reference material for high reliability and performance applications. In this work, a multi-scale approach is proposed to investigate the mechanical properties of polymeric based material under strain. To achieve a better understanding of phenomena occurring at the smaller scales, a coupling of a Finite Element Method (FEM) and Molecular Dynamics (MD) modeling in an iterative procedure ...
Modelling charge transport in CNT-polymer films
Martins, J. P.; Marques, L.; Ramos, Marta M. D.Thin films of composites based on a blend of a polymer and carbon nanotubes (CNTs) have the potential to be used in electronic and optoelectronic devices. However, the charge transport through the CNT-polymer films depends on the concentration of CNTs and their arrangement within the polymer matrix. Here we use a mesoscopic model developed by us, based on a dynamical Monte-Carlo method, to simulate the charge t...