RSS 1.0Departamento de Matemática
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Influence of structural disorder on the photocatalytic properties of ZnS nanocrystals prepared by the one-pot solvothermal approach
; Da Silva Lopes Fabris, Guilherme
; Sambrano, Julio Ricardo ; ; (Ecletica Quimica, 2022) [Artigo]
This study focuses on the impact of the sulfur vacancies on the photocatalytic response of the ZnS nanocrystals synthesized by solvothermal method varying the concentration of zinc acetate/thiourea precursors. XRD patterns ... -
Enhancing the mechanical properties and providing bioactive potential for graphene oxide/montmorillonite hybrid dental resin composites
; ; ; ; ; ; Brondino, Nair Cristina Margarido; ; ; (Scientific Reports, 2022) [Artigo]
This in vitro study synthetized hybrid composite nanoparticles of graphene oxide (GO) and montmorillonite MMt (GO-MMt) by ultrasound treatments. Samples were characterized by X-ray diffraction, FT-Raman, FTIR, TEM and SEM. ... -
Emptiness in Tragic Times: some remarks on today´s Brazilian public policies
Garnica, Antonio Vicente Marafioti (Bolema - Mathematics Education Bulletin, 2022) [Resenha]
This paper has a hybrid structure and is, at the same time, an academic essay, a manifesto and a summary of articles published in the mainstreammedia. It was composed, mainly, from journalistic sources, and has as its theme ... -
Performance and stability of femtosecond laser-irradiated Fe2O3 materials as photocatalysts for methylene blue dye discoloration
; ; de Oliveira, Regiane Cristina; Sambrano, Julio Ricardo ; ; ; ; (Ecletica Quimica, 2022) [Artigo]
The disposal of substances pollutant, such as methylene blue dye (MB), into wastewater, arouses the interest of technologies to remove these pollutants. The discoloration of MB by photocatalysis and using femtosecond ... -
Optimization-Based Models for Estimating Residual Demand Curves for a Price-Maker Company
(IEEE Transactions on Power Systems, 2022) [Artigo]The Residual Demand Curve (RDC) aims to estimate the day-ahead market clearing prices given the quotas scheduled for a price-maker generation company in the market. Traditionally, this curve has been obtained by the ... -
Effect of thickness on shrinkage stress and bottom-to-top hardness ratio of conventional and bulk-fill composites
; ; ; Brondino, Nair Cristina Margarido; ; (European Journal of Oral Sciences, 2021) [Artigo]
This study evaluated the effect of the material thickness on shrinkage stress and bottom-to-top hardness ratio of conventional and bulk-fill composites. Six commercial composites were selected based on their different ... -
Método Híbrido de Pontos Interiores com Enxame de Partículas para Resolução do Problema de Fluxo de Potência Ótimo Reativo com Variáveis Discretas
Pavan, Rafael; Soler, Edilaine Martins (2021 14th IEEE International Conference on Industry Applications, INDUSCON 2021 - Proceedings, 2021) [Trabalho apresentado em evento]
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History of Mathematics Education in Brazil: an overview of secondary education
; Garnica, Antonio Vicente Marafioti (Mathematics Enthusiast, 2021) [Artigo]
The field of the history of mathematics education, inscribed in the field of research on mathematics education in Brazil, has been developed as a result of the work of many groups of researchers, dedicated to varied themes ... -
Suppression of Anderson localization of light in one-dimensional disordered photonic superlattices
; Bruno-Alfonso, A.; ; (Physical Review B - Condensed Matter and Materials Physics, 2012) [Artigo]
The localization properties of electromagnetic modes in one-dimensional disordered photonic superlattices are theoretically studied. The multilayered system is considered to be composed of alternating stacks of two different ... -
Anderson localization and Brewster anomalies in photonic disordered quasiperiodic lattices
; Bruno-Alfonso, A.; ; (Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 2011) [Artigo]
A comprehensive study of the properties of light propagation through one-dimensional photonic disordered quasiperiodic superlattices, composed of alternating layers with random thicknesses of air and a dispersive metamaterial, ... -
Calculation of magnetodonor states in InP and polaron effects
Bruno-Alfonso, Alexys; (International Journal of Modern Physics B, 2009) [Artigo]
Far-infrared transitions in polar semiconductors are known to be affected by the presence of shallow donor impurities, external magnetic fields and the electron-LO-phonon interaction. We calculate the magnetodonor states ... -
Band edge states of the n =0 gap of Fibonacci photonic lattices
Bruno-Alfonso, A.; ; ; (Physical Review A - Atomic, Molecular, and Optical Physics, 2008) [Artigo]
The stationary and normally incident electromagnetic modes in Fibonacci lattices with generating layers of positive and negative indices of refraction are calculated by a transfer-matrix technique. It is shown that the ... -
Pb1-x Cax TiO3 solid solution (x=0.0, 0.25, 0.50, and 0.75): A theoretical and experimental approach
; ; Sambrano, Júlio Ricardo; ; ; Varela, José Arana ; Longo, Elson (Physical Review B - Condensed Matter and Materials Physics, 2007) [Artigo]
In this paper we report an experimental and theoretical study based on a periodic density functional investigation into selected compositions of Pb1-x Cax TiO3 (x=0.0, 0.25, 0.50, and 0.75). Based on our findings, we propose ... -
On a control of a non-ideal mono-rail system with periodics coefficients
(Proceedings of the ASME International Design Engineering Technical Conferences and Computers and Information in Engineering Conference - DETC2005, 2005) [Trabalho apresentado em evento]In this work, the problem in the loads transport (in platforms or suspended by cables) it is considered. The system in subject is composed for mono-rail system and was modeled through the system: inverted pendulum, car and ... -
Thirteen-band tight-binding model for the MoS2 monolayer
Meneghetti, Luiz Antonio; Bruno-Alfonso, Alexys (Materials Research, 2021) [Artigo]
A tight-binding model is fitted to density-functional calculations of the electronic structure of the MoS2 monolayer. The model involves 13 atomic orbitals per unit cell: the 4d orbitals of the molybdenum atom plus the 3s ... -
Thirteen-band tight-binding model for the MoS2 monolayer
Meneghetti Junior, Luiz Antonio; Bruno-Alfonso, Alexys (Materials Research, 2021) [Artigo]
A tight-binding model is fitted to density-functional calculations of the electronic structure of the MoS2 monolayer. The model involves 13 atomic orbitals per unit cell: the 4d orbitals of the molybdenum atom plus the 3s ... -
Light localization in one-dimensional photonic crystal heterostructures
Tanaue, Helena Borlina; ; Bruno-Alfonso, Alexys (Photonics and Nanostructures - Fundamentals and Applications, 2021) [Artigo]
Effects of both metamaterial inclusion and lack of inversion symmetry on the localized modes in one-dimensional photonic heterostructures under normal incidence are investigated. Each structure consists of two semi-infinite ... -
Salicylic acid boosts the tio2 and zno-mediated photodegradation of paracetamol
Peres, Matheus Ruffo; Pastrello, Bruna ; Sambrano, Júlio Ricardo ; ; De Souza, Aguinaldo Robinson ; Ximenes, Valdecir Farias (Materials Research, 2021) [Artigo]
Titanium dioxide (TiO2) and zinc oxide (ZnO) are among the most used catalysts in photodegradation. Paracetamol and salicylic acid are widely used as pharmaceutical drugs. We found that paracetamol is less susceptible to ... -
Exploratory and confirmatory spatial data analysis tools in transport demand modeling
; Brondino, Nair Cristina Margarido; (Proceedings of 10th International Conference on Computers in Urban Planning and Urban Management, CUPUM 2007, 2007) [Trabalho apresentado em evento]
The main goal of this paper is to discuss a method for the definition of spatial dependence indicators and their inclusion as variables into transportation demand models. The method is based on ESDA (Exploratory Spatial ... -
An overview on the photoluminescence emission in ZNO single crystal. A joint experimental and theoretical analysis
; ; Sambrano, Júlio R.; Longo, Valéria M. ; Macário, Leilane R. ; ; ; Varela, José A. ; Longo, Elson (Photoluminescence: Applications, Types and Efficacy, 2012) [Capítulo de livro]
The purpose of the present chapter is to join both the experimental and theoretical results to explain the different responses of photoluminescence (PL) emission at room temperature of ZnO powders by using different ...