Dispersion Relations
Mostrando 1-12 de 30 artigos, teses e dissertações.
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1. Padrões espaciais de samambaias em Floresta Estacional Perenifólia na transição Amazônia-Cerrado
Resumo O clima e as condições edáficas são importantes preditores dos padrões espaciais e da diversidade alfa de espécies vegetais. A distribuição espacial das populações vegetais fornece informações sobre processos ecológicos que regem as comunidades. Nesse estudo investigamos a riqueza e os padrões espaciais intra e interespecíficos de espé
Rodriguésia. Publicado em: 25/04/2019
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2. Ultra Wide Band Radar Cross Section Reduction of a Perfectly Electric Conductor Sphere by the Application of Multilayer Metamaterial Coatings
Abstract A full-wave analytical method using the addition theorems and Hertzian potential functions are used to compute the radar cross section of a sphere coated by several layers composed of common materials and metamaterials. The minimization and maximization of radar cross section of a perfectly electric conductor sphere with such coatings are realized i
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2016-12
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3. Effect of Metal Dispersion on the Hydrogenation of 2-Amyl Anthraquinone over Pd/Al2O3 Catalyst
A series of highly dispersed Pd/Al2O3 catalysts were prepared via the polyol method. The catalysts were characterized by nitrogen adsorption, X-ray diffraction (XRD), UV-Vis spectrophotometry, temperature programmed reduction (TPR) and transmission electron microscopy (TEM). The influence of Pd particle size on the hydrogenation of 2-amyl anthraquinone (AAQ)
J. Braz. Chem. Soc.. Publicado em: 2016-06
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4. Nonlocal continuum mechanics formulation for axial, flexural, shear and contraction coupled wave propagation in single walled carbon nanotubes
This paper presents the effect of nonlocal scaling parameter on the coupled i.e., axial, flexural, shear and contraction, wave propagation in single-walled carbon nanotubes (SWCNTs). The axial and transverse motion of SWCNT is modeled based on first order shear deformation theory (FSDT) and thickness contraction. The governing equations are derived based on
Lat. Am. j. solids struct.. Publicado em: 2012-08
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5. Hyptis fruticosa Salzm. ex Benth. (Lamiaceae): caracterização botânica, química, avaliações ecofisiológicas e atividades farmacológicas. / Hyptis fruticosa Salzm. ex Benth. (Lamiaceae): characterization botany, chemistry, ecophysiological assessments and pharmacological activities.
Hyptis fruticosa Salzm. ex Benth. (Alecrim do campo) is an aromatic plant widely used in folk medicine due to its therapeutic properties. Therefore the aim of this work was to undertake botanical, chemical, ecophysiological, and pharmacological studies. The botanical investigations observed and analyzed information about morphological, physiological, and env
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/09/2010
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6. Essays on the general equilibrium effects of barriers to trade on economic growth, foreign trade and the location of economic activity in Brazil
This work presents a fully operational interstate CGE model implemented for the Brazilian economy that tries to quantify both the role of barriers to trade on economic growth and foreign trade performance and how the distribution of the economic activity may change as the country opens up to foreign trade. Among the distinctive features embedded in the model
Publicado em: 16/04/2010
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7. Analytical, empirical and phenomenological aspects of elastic hadron scattering at high energies / Aspectos analiticos, empiricos e fenomenologicos do espalhamento elastico de hadrons em altas energias
We investigate high-energy elastic hadron scattering by means of three different approaches: analytical, empirical, and phenomenological. The first one is characterized by the fundamental principles of analyticity and crossing symmetry, polynomial limits for the scattering amplitude and dispersion relations. In special, for classes of functions of physical i
Publicado em: 2009
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8. Aspectos da introdução das espécies exóticas: o capim-gordura e a braquiária no Parque Nacional de Brasília
Invasive alien species are the major biological threats to the environment, with huge losses to the economy, to the biodiversity and natural ecosystems, an also provides risks to human health. They are considered the second leading cause of biodiversity loss. Currently underway is acceleration in the process of biological invasions and National Park of Brasi
Publicado em: 2009
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9. Study of the atmospheric and oceanic conditions in the southweast atlantic and its relation with the Brazilian sardine catch extremes / Estudo das condições atmosféricas e oceânicas do atlântico sudoeste e suas associações com extremos de captura da sardinha-verdadeira
The Brazilian Sardine is an important fishing resource for the country, with restricted occurrence in the Southeast Brazilian Bight (SBB). Landing records of this species shows years of high capture, as in 1973 with 225 thousand tons and the minimum in 2000 with 20 thousand tons. In this work was studied the oceanic and atmospheric characteristics of the mos
Publicado em: 2009
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10. MODOS QUASE-NORMAIS E A CORRESPONDÊNCIA ADS/CFT / QUASINORMAL MODES AND THE ADS/CFT CORRESPONDENCE
The electromagnetic and gravitational quasinormal mode spectra of plane-symmetric anti-de Sitter black holes are investigated in the present work. According to the AdS/CFT correspondence, the black hole quasinormal frequencies correspond to the poles of R-current and stress-energy tensor correlation functions in the holographically dual field theory: the N =
Publicado em: 2008
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11. Competência oral-enunciativa em língua estrangeira (inglês): fronteiras e limites
This thesis was developed in an inter/transdisciplinary approach that involves Applied Linguistics (AL), French Discourse Analysis (DA) and Dialogical Discourse Analysis (DDA). It was designed to investigate the constitutive representations of oral-enunciative competence (OEC) in English constructed by some subjects when occupying distinct discursive places
Publicado em: 2008
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12. Evolução de terrenos tectono-metamórficos da Serrania do Ribeira e Planalto Alto Turvo (SP, PR) / Evolution of tectono-metamorphic terranes of the Ribeira Ridge and Alto Turvo Plateau, SE Brazil
Numerous Precambrian terranes of enigmatic origin are recognized in the Ribeira Valley and Alto Turvo Plateau regions (Southeastern Brazil), based on contrasting evolutive histories and distinct lithotectonic, metamorphic and structural patterns. These suspect terranes form three major composite terranes juxtaposed during the late Brasiliano Cycle: Apiaí Te
Publicado em: 2008