17 documents found, page 1 of 2
Mechanical Properties and Microstructural Characterization of Aged Nickel-based...
Silva, Cleiton Carvalho; Albuquerque, Victor Hugo Costa de; Miná, Émerson Mendonça; Moura, Elineudo Pinho de; Tavares, João Manuel R.S.The aim of this work was to evaluate the different phases formed during solidification and after thermal aging of the as-welded 625 nickel-based alloy, as well as the influence of microstructural changes on the mechanical properties. The experiments addressed aging temperatures of 650 and 950 C for 10, 100, and 200 hours. The samples were analyzed by electron microscopy, microanalysis, and X-ray diffraction in ...
Thermal aging effects on the microstructure of Nb-bearing nickel based superall...
Albuquerque, Victor Hugo Costa de; Silva, Cleiton Carvalho; Normando, Paulo Garcia; Moura, Elineudo Pinho de; Tavares, João Manuel R.S.Secondary phases such as Laves and carbides are formed during the final stages of solidification of the nickel based superalloy Inconel 625 coatings deposited during the gas tungsten arc welding (GTAW) cold wire process. However, when aged at high temperatures, other phases can precipitate in the microstructure, like the c00 and d phases. The aim of this work was to evaluate the different phases formed during t...
Automatic microstructural characterization and classification using artificial ...
Nunes, Thiago M.; Albuquerque, Victor Hugo Costa de; Papa, João Paulo; Silva, Cleiton C.; Normando, Paulo Garcia; Moura, Elineudo Pinho deSecondary phases such as Laves and carbides are formed during the final solidification stages of nickel based superalloy coatings deposited during the gas tungsten arc welding cold wire process. However, when aged at high temperatures, other phases can precipitate in the microstructure, like the c00 and d phases. This work presents a new application and evaluation of artificial intelligent techniques to classif...
Phase transformations evaluation on a UNS S31803 duplex stainless steel based o...
Silva, Edgard de Macedo; Albuquerque, Victor Hugo Costa de; Leite, Josinaldo Pereira; Varela, Antonio Carlos Gomes; Moura, Elineudo Pinho deDuplex stainless steel presents special mechanical properties such as, for example, mechanical and corrosion strength, becoming competitive in relation to the other types of stainless steel. One of the great problems of duplex stainless steel microstructural changes study is related to embrittlement above 300 ◦C, with the precipitation of the phase occurring over the ferritic microstructure. Aiming to character...
Auditory brainstem response in children with risk factor for hearing loss: comp...
Quintela, Lara; Gentil, Fernanda; Tavares, João Manuel R.S.The auditory brainstem response (ABR) is classically evoked with the click stimulus. New stimuli, such as chirp, have been proposed with the aim of improving the identification of different types and degrees of hearing loss.
Recent advances on optimum-path forest for data classification: Supervised, sem...
Papa, João Paulo [UNESP]; Amorim, Willian Paraguassu; Falcão, Alexandre Xavier; Tavares, João Manuel R.S.Made available in DSpace on 2022-05-01T09:47:30Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-12-15; Although one can find several pattern recognition techniques out there, there is still room for improvements and new approaches. In this book chapter, we revisited the Optimum-Path Forest (OPF) classifier, which has been evaluated over the last years in a number of applications that consider supervised,...
Dual tasking reduces gait asymmetry of trajectory deviation during obstacle cir...
Corradini, Julia R. [UNESP]; Silveira-Ciola, Aline P. [UNESP]; Pereira, Vinicius A.I. [UNESP]; Kuroda, Marina H. [UNESP]; Faria, Murilo H. [UNESP]Made available in DSpace on 2022-05-01T15:13:34Z (GMT). No. of bitstreams: 0 Previous issue date: 2022-06-01; Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES); Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP); Background: Certain aspects of gait may depend on cognition, and the effects of dual-tasking (DT) on gait asymmetry (GA) during obstacle circumvention in people with Parkin...
A competitive strategy for atrial and aortic tract segmentation based on deform...
Morais, Pedro André Gonçalves; Vilaça, João Luis Araújo Martins; Queirós, Sandro Filipe Monteiro; Bourier, Felix; Deisenhofer, IsabelMultiple strategies have previously been described for atrial region (i.e. atrial bodies and aortic tract) segmentation. Although these techniques have proven their accuracy, inadequate results in the mid atrial walls are common, restricting their application for specific cardiac interventions. In this work, we introduce a novel competitive strategy to perform atrial region segmentation with correct delineation...
Thermal infrared image processing to assess heat generated by magnetic nanopart...
Rodrigues, Raquel Oliveira; Gomes, Helder; Lima, Rui A.; Silva, Adrián; Rodrigues, Pedro João; Tavares, Pedro B.; Tavares, João Manuel R.S.Magnetic fluid hyperthermia (MFH) is considered a promising therapeutic technique for the treatment of cancer cells, in which magnetic nanoparticles (MNPs) with superparamagnetic behavior generate mild-temperatures under an AC magnetic field to selectively destroy the abnormal cancer cells, in detriment of the healthy ones. However, the poor heating efficiency of most NMPs and the imprecise experimental determi...
Standing balance in individuals with Parkinson's disease during single and dual...
Fernandes, Ângela; Coelho, Tiago; Vitória, Ana; Ferreira, Augusto; Santos, Rubim; Rocha, Nuno; Fernandes, Lia; Tavares, João Manuel R.S.This study aimed to examine the differences in standing balance between individuals with Parkinson's disease (PD) and subjects without PD (control group), under single and dual-task conditions. A cross-sectional study was designed using a non-probabilistic sample of 110 individuals (50 participants with PD and 60 controls) aged 50 years old and over. The individuals with PD were in the early or middle stages of...