Search Results - "Pereira, João B. M."

In-fiber Fabry-Perot interferometer for strain and magnetic field sensing by Costa, Greice K B, Gouvêa, Paula M P, Soares, Larissa M B, Pereira, João M B, Favero, Fernando, Braga, Arthur M B, Palffy-Muhoray, Peter, Bruno, Antonio C, Carvalho, Isabel C S

“…In this paper we discuss the results obtained with an in-fiber Fabry-Perot interferometer (FPI) used in strain and magnetic field (or force) sensing. The…”
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Fabry–Perot Cavity Optimization for Absolute Strain Sensing Using Finite Element Analysis by Pereira, João M. B., Gouvea, Paula M. P., Braga, Arthur M. B., Carvalho, Isabel C. S., Bruno, Antonio C.

“…The finite element method (FEM) was used to investigate the optical–mechanical behavior of a Fabry–Perot Interferometer (FPI) composed of a capillary segment…”
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Characterizing Complex Mineral Structures in Thin Sections of Geological Samples with a Scanning Hall Effect Microscope by Araujo, Jefferson F D F, Reis, Andre L A, Oliveira, Jr, Vanderlei C, Santos, Amanda F, Luz-Lima, Cleanio, Yokoyama, Elder, Mendoza, Leonardo A F, Pereira, João M B, Bruno, Antonio C

“…We improved a magnetic scanning microscope for measuring the magnetic properties of minerals in thin sections of geological samples at submillimeter scales…”
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Optical poling by means of electrical corona discharge by Pereira, João M. B., Tarasenko, O., Claesson, Åsa, Laurell, Fredrik, Margulis, Walter

“…Electrical corona discharge is employed in this work to deposit ions on the surface of an optical fiber, creating a strong electric field that is used for…”
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Electrooptic control of the modal distribution in a silicate fiber by Pereira, João M B, Grüner-Nielsen, Lars, Rottwitt, Karsten, Town, Graham, Laurell, Fredrik, Margulis, Walter

“…We demonstrate the use of the electrooptic effect to control the propagation constant of the guided modes in silicate few mode fibers with internal electrodes…”
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On the Effects of Spatial Confounding in Hierarchical Models by Nobre, Widemberg S., Schmidt, Alexandra M., Pereira, João B. M.

“…Summary Usually, in spatial generalised linear models, covariates that are spatially smooth are collinear with spatial random effects. This affects the bias…”
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Linear electro-optical effect in silica fibers poled with ultraviolet lamp by Pereira, João M B, Camara, Alexandre R, Laurell, Fredrik, Tarasenko, Oleksandr, Margulis, Walter

“…A second-order nonlinearity was induced in silica fibers poled by exposure to ultraviolet (UV) radiation and simultaneous high voltage applied to internal…”
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Bayesian factor models for multivariate categorical data obtained from questionnaires by Capdeville, Vitor, Gonçalves, Kelly C. M., Pereira, João B. M.

“…Factor analysis is a flexible technique for assessment of multivariate dependence and codependence. Besides being an exploratory tool used to reduce the…”
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Assembling a magnetometer for measuring the magnetic propertiesof iron oxide microparticles in the classroom laboratory by Araújo, Jefferson F. D. F., Pereira, João M. B., Bruno, Antônio C.

“…A compact magnetometer, simple enough to be assembled and used by physics instructional laboratory students, is presented. The assembled magnetometer can…”
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Optical creation and erasure of the linear electrooptical effect in silica fiber by Camara, Alexandre R, Pereira, João M B, Tarasenko, Oleksandr, Margulis, Walter, Carvalho, Isabel C S

“…We study the creation and erasure of the linear electrooptical effect in silicate fibers by optical poling. Carriers are released by exposure to green light…”
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An efficient sampling scheme for dynamic generalized models by Migon, Helio S., Schmidt, Alexandra M., Ravines, Romy E. R., Pereira, João B. M.

“…A multimove sampling scheme for the state parameters of non-Gaussian and nonlinear dynamic models for univariate time series is proposed. This procedure…”
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A weakly informative prior for Bayesian dynamic model selection with applications in fMRI by Fúquene Patiño, Jairo A., Betancourt, Brenda, Pereira, João B. M.

“…In recent years, Bayesian statistics methods in neuroscience have been showing important advances. In particular, detection of brain signals for studying the…”
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Spatial confounding in hurdle multilevel beta models: the case of the Brazilian Mathematical Olympics for Public Schools by Pereira, João B. M., Nobre, Widemberg S., Silva, Igor F. L., Schmidt, Alexandra M.

“…Summary Among the many disparities for which Brazil is known is the difference in performance across students who attend the three administrative levels of…”
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Model-Based Inference for Rare and Clustered Populations From Adaptive Cluster Sampling Using Auxiliary Variables by Nolau, Izabel, Gonçalves, Kelly C M, Pereira, João B M

“…Abstract Rare populations, such as endangered animals and plants, drug users and individuals with rare diseases, tend to cluster in regions. Adaptive cluster…”
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Novel scanning dc-susceptometer for characterization of heat-resistant steels with different states of aging by Pereira, João M.B., Pacheco, Clara Johanna, Arenas, Monica P., Araujo, Jefferson F.D.F., Pereira, Gabriela R., Bruno, Antonio C.

“…•A scanning dc-susceptometer for millimeter-scale samples has been built.•The dc-susceptometer is equipped with a Hall gradiometer.•The cross-section of…”
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Graphene-Material Based Nanocomposite-Coated Optical Fibres: A Multi-Functional Optical Fibre for Improved Distributed Sensing Performance in Harsh Environment by Tow, Kenny Hey, Alomari, Sandy, Pereira, Joao M.B., Neves, Tiago, Claesson, Asa

“…The optical fibre coating is essential to ensure high performance and reliability of the optical fibre. Out of all polymer-coated fibres, polyimide coatings…”
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Hermetic Carbon Coatings for Electro-Thermal All-Fiber Phase Modulators by Garcia-Ruiz, Andres, Martins, Hugo F., Magalhaes, Regina, Pereira, Joao M. B., Tarasenko, Oleksandr, Norin, Lars, Margulis, Walter, Martin-Lopez, Sonia, Gonzalez-Herraez, Miguel

“…Joule effect and thermal response of several carbon-coated fibers are modeled and analyzed. An electro-thermally driven all-fiber phase modulator based on…”
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Fabrication and characterization of arc-induced long period gratings in optical fibers with micro-channels by Srivastava, Anubhav, Esposito, Flavio, Pereira, Joao M. B., Campopiano, Stefania, Iadicicco, Agostino

“…In this work, we report about the fabrication and characterization of long period gratings (LPG) in so-called side-hole fibers (SHF). They have a different…”
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Novel Long Period Gratings in Channeled Optical Fibers by Srivastava, Anubhav, Esposito, Flavio, Pereira, Joao M. B., Campopiano, Stefania, Iadicicco, Agostino

“…Here we report about the development of a fiber optic based microfluidic sensor. It is based on a single-mode fiber having two micro-channels with a diameter…”
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Poling Optical Fibers with UV Lamp by B. Pereira, Joao M., Camara, Alexandre R., Laurell, Fredrik, Tarasenko, Oleksandr, Margulis, Walter

“…Silicate fibers with internal electrodes are optically poled without a laser by side-exposure to radiation from a UV tubular lamp. Electrooptic coefficients ϰ…”
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