Wave Front
Mostrando 1-12 de 51 artigos, teses e dissertações.
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1. Simulation of Current Pulses and Sound Waves Resulting from Partial Discharges in a Needle-Plane Geometry in Air
Abstract Partial discharges can occur in different types of electric equipment and cause progressive insulation deterioration, so there is interest in monitoring partial discharges for assessing the state of the isolation of an electric system and to predict failures. Techniques to detect partial discharges, such as detecting ultrasonic emission, have been p
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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2. Stress Distribution in Graded Cellular Materials Under Dynamic Compression
Abstract Dynamic compression behaviors of density-homogeneous and density-graded irregular honeycombs are investigated using cell-based finite element models under a constant-velocity impact scenario. A method based on the cross-sectional engineering stress is developed to obtain the one-dimensional stress distribution along the loading direction in a cellul
Lat. Am. j. solids struct.. Publicado em: 2017-08
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3. Estimación del tiempo de iluminación solar sobre la tierra mediante un modelo analítico: un escenario fértil para enseñar física
We proposed an analytical model for the calculus of illumination time of the Earth for any time of year and any latitude. This model assumes the obliquity of the ecliptic as constant, the light beams as parallels, the Earth as spherical, the movement of translation of Earth as uniform circular. Also, this model showed a context of the astronomy whereby the t
Rev. Bras. Ensino Fís.. Publicado em: 2013-06
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4. Numerical experimental comparison of dam break flows with non-Newtonian fluids
The dam-break flow involving non-Newtonian fluids is a type of flow commonly observed in nature as well as in common industrial processes. Experiments of non-Newtonian dam-break flows were conducted in horizontal channels and aqueous solutions of Carbopol 940 were used, which were modeled by the Herschel-Bulkley constitutive equation. Their flows were filmed
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2012-06
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5. AT THE BORDELINE OF THE OTHER: ANTROPOPHAGIC UPRISINGS / NA FRONTEIRA DO OUTRO: MOTINS ANTROPOFÁGICOS
This essay-thesis comes from my restlessness about the way the relationship between me and the others , between the subject and the object, insummary, between the subjectivizing process of the modernity / coloniality and the alterity or other non occidental gnosiologies. How to behave in front of the other ontologies, other epistemologies and other ethics wh
Publicado em: 2010
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6. Nanotecnologia, ambiente e direito: desafios para a sociedade na direção a um marco regulatório
Nanotechnology launches a new era of technological convergence without ancestors from the human society history, whether its branches are placed in the majority of sciences and establishes new ways of communication. Analyze nanoparticles is being in front of something thoughtless because all scientific knowledge acquired is not the parameter, because the dim
Publicado em: 2010
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7. A study of shock wave front and magnetic cloud extent in the inner heliosphere using observations from multi-spacecrafts / Estudo da extensão das frentes de choque e das nuvens magnéticas na heliosfera interna usando observações de múltiplas espaçonaves.
As duas sondas Helios viajaram na heliosfera interna do final do ano de 1974 até o início do ano de 1986, variando sua posição em longitude e distância radial (de 0.3 a 1 AU). Elas coletaram dados de plasma e campo magnético de alta resolução durante um ciclo solar completo. Mais de 390 ondas de choque interplanetárias guiadas por Ejeções Coronais
Publicado em: 2009
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8. Estudo da extensão das frentes de choque e das nuvens magnéticas na heliosfera interna usando observações de múltiplas espaçonaves. / A study of shock wave front and magnetic cloud extent in the inner heliosphere using observations from multi-spacecrafts
As duas sondas Helios viajaram na heliosfera interna do final do ano de 1974 até o início do ano de 1986, variando sua posição em longitude e distância radial (de 0.3 a 1 AU). Elas coletaram dados de plasma e campo magnético de alta resolução durante um ciclo solar completo. Mais de 390 ondas de choque interplanetárias guiadas por Ejeções Coronais
Publicado em: 2009
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9. Avaliação da qualidade óptica de lentes de contato gelatinosas na correção de miopia
OBJETIVO: Avaliar a qualidade óptica de olhos adaptados com dois tipos diferentes de lentes de contato gelatinosas: Acuvue® 2 (Vistacon J&J Vision Care Inc., EUA) e World Vision Disposable Asférica Wave Front® (World Vision Ophthalmic, Brasil). MÉTODOS: Estudo clínico e prospectivo com intervenção em amostra constituída por 40 indivíduos portadores
Arquivos Brasileiros de Oftalmologia. Publicado em: 2008-12
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10. Simulation of optical and physiological phenomena of the human vision / Simulação de fenômenos óticos e fisiológicos do sistema de visão humana
The increase in performance of the modern computers has driven scientific work in the areas of computer simulation. Many authors use in their research commercial tools that use embedding algorithms, which sources are not provided, and it makes harder and sometimes impossible, the development of novel theories or experiments. This work explores this gap left
Publicado em: 2008
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11. AVALIAÇÃO EXPERIMENTAL DOS EFEITOS DE CINTILAÇÃO NO CANAL ÓPTICO NO ESPAÇO LIVRE EM 780 NM, 1550 NM E 9100 NM / EXPERIMENTAL EVALUATION OF SCINTILLATION EFFECTS IN FREE SPACE OPTICAL CHANNEL IN 780 NM, 1550 NM AND 9100 NM
Optical laser communication in free space is an area that has been attracting increasing interest in the last years, due to its possible capacity to resolve the problem of information diffusion, giving higher capacity access to users. Wireless optical systems offer speedy installation and initialization procedures and system flexibility, with the equivalent
Publicado em: 2008
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12. BK equation and traveling wave solutions
It has been shown that the transition to the saturation regime of high energy QCD is similar to the formation of the front of a traveling wave. In particular, it can be verified that Balitsky-Kovchegov (BK) evolution equation reduces, after some approximations, to the nonlinear Fisher and Kolmogorov-Petrovsky-Piscounov (FKPP) equation, well-known from statis
Brazilian Journal of Physics. Publicado em: 2007-07