Ricardo Oliveira
YOU?
Author Swipe
View article: MCPA Optical Fiber Sensors via Molecularly Imprinted Polymers Combined with Intensity-Based and Plasmonic Platforms
MCPA Optical Fiber Sensors via Molecularly Imprinted Polymers Combined with Intensity-Based and Plasmonic Platforms Open
Two low-cost optical–chemical sensors based on plastic optical fibers (POFs) and molecularly imprinted polymers (MIPs) are developed and tested for the detection of 4-chloro-2-methylphenoxyacetic acid (MCPA), a herbicide of great interest …
View article: Albendazole Detection at a Nanomolar Level Through a Fabry–Pérot Interferometer Realized via Molecularly Imprinted Polymers
Albendazole Detection at a Nanomolar Level Through a Fabry–Pérot Interferometer Realized via Molecularly Imprinted Polymers Open
Albendazole (ABZ) is a broad-spectrum anthelmintic drug whose residual presence in food and the environment raises public health concerns, requiring rapid and sensitive methods of detection. In this work, a sensitive Fabry–Pérot interferom…
View article: Additive manufacturing: an overview
Additive manufacturing: an overview Open
View article: Additive Manufacturing in Optics and Photonics
Additive Manufacturing in Optics and Photonics Open
View article: High sensitive optical-chemical sensors based on optical fibers in a reflection scheme combined with C-shaped waveguides of MIP-microbeads
High sensitive optical-chemical sensors based on optical fibers in a reflection scheme combined with C-shaped waveguides of MIP-microbeads Open
In order to monitor analytes in liquid matrices, optical fiber probes in reflection mode can be exploited in several application fields. This work presents a novel sensing approach based on C-shaped waveguides obtained by filling PVC C-sha…
View article: Axisymmetric FE-based reliability analysis of corroded pipelines using advanced approaches
Axisymmetric FE-based reliability analysis of corroded pipelines using advanced approaches Open
View article: An Extrinsic Optical Fiber Sensor Probe with Micrometer Size via a C-Shaped Waveguide with a Core of MIP
An Extrinsic Optical Fiber Sensor Probe with Micrometer Size via a C-Shaped Waveguide with a Core of MIP Open
Optical–chemical sensors based on optical fibers can be made in reflection or transmission schemes. In the reflection scheme, the sensing area is typically present at the end of the fiber, and the light source and the detector are placed o…
View article: Influência do exercício físico na qualidade de vida e no sono de atletas táticos
Influência do exercício físico na qualidade de vida e no sono de atletas táticos Open
Introdução: Os atletas táticos estão expostos a intensas exigências físicas e mentais, além de jornadas de trabalho irregulares, que podem impactar negativamente sua saúde, especialmente a qualidade do sono. A prática regular de atividade …
View article: Silica Optical Fibers Connected via a Micro MIP-Core Waveguide to Build Optical-Chemical Sensors
Silica Optical Fibers Connected via a Micro MIP-Core Waveguide to Build Optical-Chemical Sensors Open
Molecularly imprinted polymers (MIPs) can be combined with optical fibers (OFs) to create various sensor configurations, yielding low-cost and highly sensitive extrinsic and intrinsic sensors. In this work, an MIP-based extrinsic optical f…
View article: High resolution liquid level sensor based on Archimedes’ law of buoyancy using polymer optical fiber Bragg gratings
High resolution liquid level sensor based on Archimedes’ law of buoyancy using polymer optical fiber Bragg gratings Open
View article: Apendicectomia laparoscópica versus aberta: resultados e complicações
Apendicectomia laparoscópica versus aberta: resultados e complicações Open
Introdução: A apendicite aguda é a inflamação do apêndice vermiforme, decorrente da obstrução de sua luz, com maior prevalência em homens, ao final da infância, 2° e 3° décadas. Corresponde a principal indicação cirúrgica não eletiva. Clin…
View article: Os impactos de ambientes no desenvolvimento cognitivo infantil e saúde mental
Os impactos de ambientes no desenvolvimento cognitivo infantil e saúde mental Open
Objetivo: Analisar a influência dos diversos ambientes no desenvolvimento cognitivo infantil e saúde mental, identificando áreas específicas de prejuízo e intervenções potenciais para apoiar o desenvolvimento saudável. Métodos: Revisão bib…
View article: Avanços no tratamento da Leucemia Mieloide Aguda: uma revisão de literatura
Avanços no tratamento da Leucemia Mieloide Aguda: uma revisão de literatura Open
A leucemia mieloide aguda (LMA) é uma neoplasia agressiva com alta mortalidade, particularmente em pacientes de alto risco. Avanços recentes no tratamento têm transformado a abordagem da doença, com destaque para terapias direcionadas, com…
View article: Use of supervised and unsupervised approaches to make zonal application maps for variable-rate application of crop growth regulators in commercial cotton fields
Use of supervised and unsupervised approaches to make zonal application maps for variable-rate application of crop growth regulators in commercial cotton fields Open
Background Zonal application maps are designed to represent field variability using key variables that can be translated into tailored management practices. For cotton, zonal maps for crop growth regulator (CGR) applications under variable…
View article: Pericardite Tuberculosa: Revisão literária sobre imunopatogênese, diagnóstico e tratamento
Pericardite Tuberculosa: Revisão literária sobre imunopatogênese, diagnóstico e tratamento Open
A pericardite tuberculosa (PT) é uma manifestação grave da tuberculose extrapulmonar, associada a altas taxas de morbimortalidade, especialmente em regiões com elevada prevalência de tuberculose e HIV. Apresenta-se com sintomas inespecífic…
View article: Transmission of 96 Gbps Over 50-m GI-POF Using 6 CWDM Channels in S, C, and L Optical Bands
Transmission of 96 Gbps Over 50-m GI-POF Using 6 CWDM Channels in S, C, and L Optical Bands Open
An aggregate transmission of 96 Gbps over 50 m of graded index plastic optical fiber (GI-POF) is demonstrated using six coarse wavelength multiplexing (CWDM) channels in S, C and L optical bands. Each channel transmits an equal rate of 16 …
View article: INTERAÇÕES ENTRE O HPV E MICROBIOTA VAGINAL NA PROGRESSÃO DE LESÕES CERVICAIS NO CÂNCER INVASIVO
INTERAÇÕES ENTRE O HPV E MICROBIOTA VAGINAL NA PROGRESSÃO DE LESÕES CERVICAIS NO CÂNCER INVASIVO Open
View article: GI-POF Transmission At Different Bit Rates, Fiber Lengths and Wavelengths: 1310 and 1550 Nm
GI-POF Transmission At Different Bit Rates, Fiber Lengths and Wavelengths: 1310 and 1550 Nm Open
The paper demonstrates the transmission of variable bit rates NRZ streams over different lengths of perfluorinated graded-index plastic optical fiber GI-POF at wavelengths of 1550 and 1310 nm. Specifically, at = 1550 nm, 16, 14 and 12 Gbp…
View article: Experimental investigation of a long-period grating based coupler for high-capacity transmission systems
Experimental investigation of a long-period grating based coupler for high-capacity transmission systems Open
In this work, we developed and characterized a coupler based on long-period gratings (LPGs). The coupler consists of two single-mode fibers close to each other with similar LPGs inscribed, and it was optimized by adjusting the longitudinal…
View article: Photochemical Modification of Diamond Surfaces Using a Pulsed Uv Laser as the Energy Source
Photochemical Modification of Diamond Surfaces Using a Pulsed Uv Laser as the Energy Source Open
View article: Helically Twisted Microstructured Polymer Optical Fiber and Its Application as a Torsion and Strain Sensor
Helically Twisted Microstructured Polymer Optical Fiber and Its Application as a Torsion and Strain Sensor Open
In this letter, we report for the first time the fabrication and sensor application of a helically twisted polymethylmethacrylate (PMMA) microstructured polymer optical fiber (mPOF). The fabrication was done by mechanically twisting the mP…
View article: Diamond coated fiber optic interferometric sensors: fabrication and application
Diamond coated fiber optic interferometric sensors: fabrication and application Open
Diamond films were deposited by chemical vapor deposition (CVD) on the tip of Fabry-Perot (FPI) and multi-mode (MMI) optical fiber interferometers. Diamond provides a robust interface capable of forming covalent bonds between atoms on its …
View article: Glyphosate Detection Through Piezoelectric and Fibre Optic Sensors Based on Molecular Imprinted Polymers
Glyphosate Detection Through Piezoelectric and Fibre Optic Sensors Based on Molecular Imprinted Polymers Open
View article: Do-it-yourself three-dimensional large core multimode fiber splitters through a consumer-grade 3D printer
Do-it-yourself three-dimensional large core multimode fiber splitters through a consumer-grade 3D printer Open
We report the design, fabrication and characterization of 3D large core (1 mm) multimode fiber splitters using a low-cost stereolithography 3D printer. The results were accomplished for symmetrical 1 × 2 and 1 × 4 splitters, where the angl…
View article: Accelerated automated screening of viscous graphene suspensions with various surfactants for optimal electrical conductivity
Accelerated automated screening of viscous graphene suspensions with various surfactants for optimal electrical conductivity Open
We robotically produce 288, full-factorial sampled, unique graphene-based drop-casted films, perform automated computer-vision detection followed by thickness and electrical conductivity measurements minimizing human time to ∼17% of the wo…
View article: In memory of Paul Marinos, January 1st, 1944 – October 10th, 2021
In memory of Paul Marinos, January 1st, 1944 – October 10th, 2021 Open
View article: Distributed Static and Dynamic Strain Measurements in Polymer Optical Fibers by Rayleigh Scattering
Distributed Static and Dynamic Strain Measurements in Polymer Optical Fibers by Rayleigh Scattering Open
We demonstrate the use of a graded-index perfluorinated optical fiber (GI-POF) for distributed static and dynamic strain measurements based on Rayleigh scattering. The system is based on an amplitude-based phase-sensitive Optical Time-Doma…
View article: 3D printed long period gratings and their applications as high sensitivity shear-strain and torsion sensors
3D printed long period gratings and their applications as high sensitivity shear-strain and torsion sensors Open
In this work we demonstrate the capability to measure shear-strain and torsion loads by bonding an optical fiber to a 3D printed periodic grooved plate. The device acts as a long period grating where the resonances show loss tunability ran…
View article: UV Inscription and Pressure Induced Long-Period Gratings through 3D Printed Amplitude Masks
UV Inscription and Pressure Induced Long-Period Gratings through 3D Printed Amplitude Masks Open
In this work, we demonstrate for the first time the capability to inscribe long-period gratings (LPGs) with UV radiation using simple and low cost amplitude masks fabricated with a consumer grade 3D printer. The spectrum obtained for a gra…
View article: 3D printing of long period gratings for curvature applications
3D printing of long period gratings for curvature applications Open
In this paper we will discuss a new type of long period grating (LPG) that consists on an optical fibre glued on top of a 3D printed grooved plate. The LPG performance will be tested for the case when pressure is applied transversely to th…