Resonant Effects
Mostrando 1-12 de 37 artigos, teses e dissertações.
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1. Radially Periodic Metasurface Lenses for Magnetic Field Collimation in Resonant Wireless Power Transfer Applications
Abstract In this paper, a new procedure and topology of magnetic metasurface lens are proposed for improving the performance of Resonant Wireless Power Transfer systems. Firstly, three subwave-length unit cells are optimized in order to get negative magnetic permeability in the same frequency, each one with a different refractive index, and they are experime
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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2. A Parametric Study of Inductive SWIPT Systems Assisted by Metamaterial Using Virtual Magnetic TL-Based Channel Modeling
Abstract This paper presents a general methodology based on the description of the inductive channel as virtual magnetic transmission-lines (VMGTLs). In comparison with other existing methods, VMGTL approach presents a better physical insight of the channel behavior since the model correctly preserves the energy flow between the transmitting and receiving co
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2021-03
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3. Rigorous Analysis of a Compact Triangular Antenna Array Using the Spectral Domain Method
Abstract The main objective of this work is the characterization of triangular array antenna with circular form by using the spectral domain technique. Firstly, the spectral domain formulation of single triangular patch antenna is given, in order to calculate its resonant frequencies and its radiation patterns. Then, we calculate and plot the total radiated
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2017-03
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4. Vibration Analysis of a Cylindrical Sandwich Panel with Flexible Core Using an Improved Higher-Order Theory
Abstract This paper deals with free vibration analysis of thick cylindrical composite sandwich panels with simply supported boundary conditions based on a new improved higher-order sandwich panel theory. The formulation used the third-order polynomial description for the displacement fields of thick composite face sheets and for the displacement fields in th
Lat. Am. j. solids struct.. Publicado em: 2017-03
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5. Tunneling effects in resonant acoustic scattering of an air bubble in unbounded water
Resumo O problema tratado neste trabalho é o espalhamento ressonante do som por uma bolha de ar imersa na água. O formalismo do espalhamento acústico em ondas parciais, relacionado ao problema proposto, é revisitado. Com base na analogia entre o espalhamento de partículas na mecânica quântica e o espalhamento acústico, os modos de vibração naturais
An. Acad. Bras. Ciênc.. Publicado em: 2016-06
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6. Improved high order free vibration analysis of thick double curved sandwich panels with transversely flexible cores
This paper dealt with free vibration analysis of thick double curved composite sandwich panels with simply supported or fully clamped boundary conditions based on a new improved higher order sandwich panel theory. The formulation used the first order shear deformation theory for composite face sheets and polynomial description for the displacement field in t
Lat. Am. j. solids struct.. Publicado em: 2014
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7. Perfis de espalhamento Raman ressonante em estruturas unidimensionais de carbono: cadeias lineares e nanotubos quiralmente enriquecidos
In resonant Raman scattering experiments using several laser lines, the intensity profile of the spectra as a function of the laser energy is related to the vibrational and electronic structure of the material. In this work, we have measured and interpreted the resonant Raman profiles for samples of chirality enriched single-walled carbon nanotube and for po
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/12/2011
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8. 15:1 Resonance effects on the orbital motion of artificial satellites
Abstract The motion of an artificial satellite is studied considering geopotential perturbations and resonances between the frequencies of the mean orbital motion and the Earth rotational motion. The behavior of the satellite motion is analyzed in the neighborhood of the resonances 15:1. A suitable sequence of canonical transformations reduces the system of
J. Aerosp. Technol. Manag.. Publicado em: 2011-12
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9. Single-line-to-earth fault limitation through the setting of Petersen coil in power transformer neutral / Limitação de correntes de falta fase-terra por meio do ajuste de bobina de petersen em neutro de transformadores de potência
The Petersen coil insertion on the neutral of the electrical distribution power system transformers has been a technical strategy adopted for several electrical utilities, in many countries with the purpose to reduce the earth-fault current intensities, enabling circuit disconnect decrease for intermittent faults and so to improve the electrical power qualit
Publicado em: 2009
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10. Parametric resonance in dissipative field dynamics
The effects of bosonic trilinear interactions are investigated in the process of resonant particle production. We study a generic model of three fields with trilinear couplings. In this model a scalar field Φ can excite a heavy bosonic field χ which then decays into a light bosonic field σ. We study the consequences of dissipation and stochastic noise ter
Brazilian Journal of Physics. Publicado em: 2008-09
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11. Teachers that show vocal disturbances: effects of the program baseado on Lessac-Madsen Resonance Method / Professores com distúrbios vocais: efeitos do método de ressonância Lessac-Madsen
Introduction: Lessac-Madsen Resonance Method for vocal therapy is a resonant voice-based training. This voice involves a healthy production with the vocal folds lightly abducted and it propitiates a strong, clear production with minimum effort. Objective: to check the pre and post effects of the program based on Lessac-Madsen Resonance Method in teachers tha
Publicado em: 2007
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12. O mundo de Constantine: um estudo semiótico do efeito digital no texto fílmico
The dissertation studies the digital effect and its performance in sincretics joints in the felt production of the audiovisual while significant of the expression. The study object is analysed in the Constantine film directed by Francis Lawrence, in 2005, like participate with other significant in the inter-semiotic way of the cinema, an audiovisual system,
Publicado em: 2007