Infrared Regime
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. EXPERIMENTAL STUDY OF ELONGATED BUBBLES IN HORIZONTAL TWO-PHASE INTERMITTENT FLOW / ESTUDO EXPERIMENTAL DE BOLHAS ALONGADAS NO ESCOAMENTO BIFÁSICO HORIZONTAL INTERMITENTE
The present work experimentally studied several relevant dynamic characteristics of gas-liquid intermittent flow through a horizontal pipe. All tests were performed in a test section formed by 50.8 mm internal diameter pipe using air and water as working fluids. The tests covered a region where the flow undergoes a complex transition from elongated bubble fl
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/04/2012
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2. Melhoria da resistência no estado fundido do polipropileno através da adição de nanoargilas. / Improvement of melt strenght of polypropylene by the addition of nanoclays.
In this work nanocomposites of polypropylene (PP) were obtained. Three types of PP with melt flow rates of 1,5; 2,2 e 37,9 g/10min (230ºC/216kg) were used. The PP with the largest melt flow rate is a product modified with peroxide. These samples were mixed with PP masterbatch Nanocor nanoMax ®-PP. Masterbatch in different concentrations ranging from 3 to 1
Publicado em: 2010
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3. Aspectos não perturbativos das teorias de Yang-Mills no calibre abeliano maximal / Non-perturbative aspects of the Yang-Mills theories in the maximal Albelian gauge
In this, we study the nonperturbative effects associated to the presence of the horizon and to the condensation of local dimension two operators in an Eucledean SU(2)Yang-Mills theory quantized in the maximal Abelian gauge. Such effects are introduced in a way to preserve the properties of renormalizability and locality of the theory. The comparison with the
Publicado em: 2009
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4. Study of Fluidized Bed Hot Melt Granulation using solid Dispersion of Indomethacin / Estudo da granulação por solidificação de materiais fundidos em leito fluidizado utilizando dispersão sólida de indometacina
Recently, there is a renewed interest in the fluidized bed hot melt granulation for the preparation of solid dosage forms in the pharmaceutical industry and academy. The several advantages of this technique have attracted may researchers, but the main advantage are undoubtedly the solvent free operation and the short processing times. The aim of this work wa
Publicado em: 2009
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5. Propagators, running coupling and condensates in lattice QCD
We present a review of our numerical studies of the running coupling constant, gluon and ghost propagators, ghost-gluon vertex and ghost condensate for the case of pure SU(2) lattice gauge theory in the minimal Landau gauge. Emphasis is given to the infrared regime, in order to investigate the confinement mechanisms of QCD. We compare our results to other th
Brazilian Journal of Physics. Publicado em: 2007-07
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6. Avaliação da técnica de termografia infravermelha para identificação de estruturas ocultas e diagnóstico de anomalias em edificações: ênfase em edificações do patrimônio histórico
The main objective of this work is to research and evaluate the results of the application of heat transfer techniques: radiation (infrared thermograph) and conduction (thermopar sensors) as a tool of diagnosis of the presence of hidden structures and anomalies at edifications which belong to the Brazilian Historical Patrimony. The utilization of a non-destr
Publicado em: 2007
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7. Noncommutative field theory
Noncommutative field theories present many surprising properties. As a consequence of the noncommutativity, high momentum modes do not decouple from the physics at large distances leading to the appearance of infrared singularities even in theories without massless particles. Being nonintegrable, these infrared singularities destroy the usual perturbative ex
Brazilian Journal of Physics. Publicado em: 2002-12
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8. Análise das propriedades químicas, morfológicas e estruturais de filmes finos de a-Si1-xCx:H depositados por PECVD. / Analysis of the chemical, morphological and structural properties of a-Si1-xCx:H thin films deposited by PECVD.
In this work we discuss the growth and characterization of amorphous hydrogenated silicon carbide thin films (a-Si1-xCx:H) deposited by plasma enhanced chemical vapor deposition (PECVD). It was used a gaseous mixture of silane, methane and hydrogen, at the silane starving plasma regime. Samples grown at these conditions and with a very low silane flow have a
Publicado em: 2001
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9. Poli(tereftalato de etileno) : reprocessamento por extrusão e metodologias de caracterização
Pellets of virgin PET were reprocessed by extrusion to evaluate the number of recycles that these materiaIs can suffer without changes their properties. After each reprocessing cycle the thermal, mechanical, optics properties, the carboxylic end groups concentration (CEG), intrinsic viscosity [h] and non-isothermal crystallization kinetics by Ozawa and Avram
Publicado em: 2000
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10. Genetic and acclimatory variation in biophysical properties of insect cuticle lipids.
Epicuticular lipids provide the primary barrier to water loss in insects and other terrestrial arthropods. Using Fourier transform infrared spectroscopy, we found that the melting temperatures for these lipids in the grasshopper Melanoplus sanguinipes varied by over 10 degrees C between individuals. The most significant determinant of lipid melting temperatu