A5038155729- Advanced Fiber Optic Sensors
- Photonic and Optical Devices
- Semiconductor Lasers and Optical Devices
- Advanced MRI Techniques and Applications
- Cardiac Imaging and Diagnostics
- Science and Education Research
- Youth, Drugs, and Violence
- Medical Imaging Techniques and Applications
- Psychology and Mental Health
- Neurological disorders and treatments
- Radiation Dose and Imaging
- Graphite, nuclear technology, radiation studies
- Lower Extremity Biomechanics and Pathologies
- Optical Coatings and Gratings
- Education Pedagogy and Practices
- Functional Brain Connectivity Studies
- Advanced Fiber Laser Technologies
- Chemistry Education and Research
- Dental Radiography and Imaging
- Health, Nursing, Elderly Care
Universidade Federal do Pampa
2024
Universidade Tecnológica Federal do Paraná
2007-2023
This work shows a curvature vector sensing device based on single long-period grating written in commercial photosensitive optical fibre. The approach uses an artificial neural network multilayer perceptrons for data analysis. Curvatures from 0.00 to 3.13 m−1 and angular orientations 0 180° were measured with the device, combined standard uncertainties of 0.05 1.5°, respectively. root mean square errors orientation 0.0008 0.3° training stage 0.002 0.9° test stage,
Objective:To investigate the effects of dilution paramagnetic contrast agent with iodinated and xylocaine on signal intensity during magnetic resonance arthrography, to improve concentration utilized in this imaging modality.Materials Methods:Samples specially prepared for study three different concentrations diluted saline, were imaged fast spin echo T1-weighted sequences fat saturation. The samples placed into flasks graphical analysis was performed as a function concentration.Results:As...
Introdução: A esquizofrenia pode ser considerada uma síndrome crônica com causas multifatoriais e heterogêneas como também, predisposição genética fatores psicossociais. Apresenta-se através de distorção da realidade delírios, alucinações, pobreza conteúdo, afrouxamento das associações até a catatonia. Objetivo: Analisar o desempenho ocupacional pacientes que possuem diagnóstico Esquizofrenia atendidos em um Ambulatório Psiquiatria Ocupações. Métodos: Trata-se estudo do tipo descritivo,...
In this work is reported the bending sensing characteristics of a long-period grating produced point-by-point with 266 nm Nd:YAG laser. Spectral changes transducer subjected to bends curvatures from 0 3.13 m<sup>-1</sup> were investigated. The magnitude bend-induced wavelength shift nonlinear and dependent on rotation cylindrical fibre relative plane. For each constant applied grating, was rotated around its axis in angular steps 15º, within range 180º. An artificial neural network model for...
The eloquent cerebral cortices are involved in movement, sensation, speech, vision, and higher cortical functions. Functional magnetic resonance imaging (fMRI) allows the evaluation of brain function, aiding neurosurgical planning by mapping areas. Considering high cost hardware involved, purpose this work is to present a more affordable, in-house alternative for these studies that can provide adequate results clinical setting. We also some practical information on how perform exams....
Objetivos: Desenvolver dois suportes para auxiliar na realização de exames joelho, nos quais são necessárias aquisições imagens radiográficas axiais da patela.
 Materiais e métodos: Os protótipos foram construídos testados com base nas medidas antropométricas coletadas pacientes voluntários, do equipamento raios-X Laboratório Radiologia UTFPR (Brasil). Um suporte teve a função acomodar os joelhos o outro receptores imagens.
 Resultados discussões: materiais selecionados confecção...
This work presents results concerning to the production and characterization of long‐period gratings in optical fibres using point‐to‐point writing technique with an ultraviolet laser. Long‐period gratings, a nominal period 407 μm, were engraved core hydrogen loaded photosensitive single‐mode fibres. The loading was carried out by submitting fibre pressure 130 atm at room temperature along time intervals up 20 days. During process, grating growth monitored recording transmission spectrum...
This work shows the thermal sensitivity of a long period grating immersed in six different external media, with refractive indices ranging from 1.0000 to 1.4315, corresponding air, water, ethanol, thinner, turpentine and kerosene. Changes negative positive values were quantified, behaviors transitioning linear non- linear, depending on index surroundings. Values for coupling thermo-optic coefficient are also determined.