Wave Generation
Mostrando 1-12 de 100 artigos, teses e dissertações.
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1. Household Infrared Technology as an Energy-Efficient Approach to Achieve C-Cπ Bond Construction Reactions
We examined the ability of short-wave infrared (IR) light in the λ1.5-3.0 μm region of the infrared emission spectrum to accomplish C-Cπ bond construction reaction between π-excessive azaheteroaromatic and different carbonyl substrates supported on a bentonitic clay catalyst in solventless condition via a three-component condensation reaction. Preliminar
Journal of the Brazilian Chemical Society. Publicado em: 2022
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2. Voltammetric Generation and Kinetic Stability of Nitro Anion Radical from Nitrofurazone in Ionic Liquids
The nitrofurazone (NF) electrochemical reduction has been studied by cyclic voltammetry (CV) and square wave voltammetry (SWV) in non-aqueous medium using three different ionic liquids (IL): BMImTf2N, BMImBF4 and BMMImTf2N, having a carbon fiber microelectrode as working electrode. In all of them, two reversible cathodic peaks were recorded for NF. Under hig
J. Braz. Chem. Soc.. Publicado em: 2021-04
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3. Medicinal Electrochemistry of Halogenated and Nitrated Pterocarpanquinones
Electrochemical methods are considered useful tools for simulations of biological redox reactions. The activities of quinones depend on their bioreduction. Biologically active pterocarpanquinones LQB-149 (nitroderivative), 150 and 151 (bromo and chloroderivatives, respectively) were electrochemically investigated by cyclic voltammetry, differential pulse vol
J. Braz. Chem. Soc.. Publicado em: 24/10/2019
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4. Application of an alternative mesh morphing method on the numerical modeling of oscillating wave surge converters
RESUMO Uma das tecnologias capazes de explorar a energia das ondas, baseada na captação das componentes horizontais do movimento destas, aliada a um sistema placa-pistão, vem experimentando um notável desenvolvimento ao longo dos últimos anos, tal dispositivo é conhecido como conversor oscilante por translação de ondas. Este possui um grande potencia
RBRH. Publicado em: 29/07/2019
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5. Linking gemology and spectral geology: a case study of elbaites from Seridó Pegmatite Province, Northeastern Brazil
Abstract reflectance spectroscopy is a fast tool for mineral identification and classification. We conducted spectral characterization of elbaite samples (n = 30) from Seridó Pegmatite Province, Borborema Province, NE Brazil, using a FieldSpec portable instrument and geochemical data from electron probe microanalysis. Visual interpretation of reflectance sp
Braz. J. Geol.. Publicado em: 13/05/2019
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6. Evaluation of the WaveOne Gold and One Shape New Generation in Reducing Enterococcus faecalis from Root Canal
Resumo A proposta deste estudo foi avaliar os sistemas WaveOne Gold e One Shape New Generation em relação à remoção bacteriana de canais infectados com Enterococcus faecalis, comparando-os com seus sistemas convencionais WaveOne e One Shape. Quarenta e oito canais disto vestibulares de molares superiores esterilizados em óxido de etileno foram contamin
Braz. Dent. J.. Publicado em: 2018-05
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7. An Analytical Solution for Fiber Optic Links with Photonic-Assisted Millimeter Wave Upconversion Due to MZM Nonlinearities
Abstract Photonic-assisted technique employed in the generation of stable and high-purity signals in the millimeter wave band has been investigated using dual-parallel Mach-Zehnder modulator. Indeed, this type of generation performs a high order RF multiplier, whose operation principle steams out from the nonlinear characteristic of the external modulators.
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2017-03
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8. Theoretical modeling of low-attenuation lamb wave modes generation in three-layer adhesive joints using angle beam transducer
AbstractIn this paper, at first the attenuation of Lamb waves in three-layer adhesive joints, including two elastic plates bonded together by a viscoelastic adhesive layer, is investigated using Global matrix method and then suitable incidence angle is theoretically calculated to generate low-attenuation Lamb waves using angle beam transducer. Theoretical bo
Lat. Am. j. solids struct.. Publicado em: 2015-03
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9. Avaliação de concreto auto-adensável com agregado reciclado de telha cerâmica / Evaluation of self-compacting concrete produced with the recycled aggregate tile
The increasing demand for raw materials in construction, especially those drawn from nature, is of great concern due to harmful impacts it produces. The use of recycled aggregates can be a sustainable and contribute to the preservation of natural resources, contributing to the sustainable development of the construction industry. The residue from the ceramic
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/08/2012
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10. Simulação da propagação de ondas ultrassônicas longitudinais em materiais estruturais aeroespaciais / Simulating the propagation of longitudinal ultrasonic waves in aerospace structural materials
The use of composite materials in the aerospace industry is increasing due to its low ratio between density and mechanical strength. To perform non-destructive testing using ultrasound, it is necessary to know the sound velocity in these materials. It is not always possible to manufacture physical prototypes during the development of a project because of tim
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/08/2012
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11. Blocos para execução de alvenaria de vedação empregando garrafas pet: avaliação mecânica e termoacústica
Recycling and reuse of materials is the most evident solution regarding sustainable development. One relevant aspect to this development refers to the integration of engineering to devise ways that enable the reuse of materials considered as waste, but with great potential of applicability in the building industry itself, through the generation of appropriat
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/05/2012
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12. Sistema de automação e controle para tanques oceânicos com múltiplos atuadores / Automation and control system for oceanic wave tank with multiple actuators.
O presente trabalho aborda o desenvolvimento de um sistema de automação e controle para tanques oceânicos com múltiplos atuadores para possibilitar a geração e absorção ativa de ondas. O desenvolvimento compreende: a implementação e a validação do sistema de automação e controle para o tanque de provas; o desenvolvimento de algoritmos para a ge
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/03/2012