Surface Of Revolution
Mostrando 1-12 de 17 artigos, teses e dissertações.
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1. A Geometric Modeling of Tracheal Elements of the Chard (Beta vulgaris) Leaf
RESUMO: Neste estudo, fornecemos uma descrição geométrica dos elementos traqueais da acelga (Beta vulgaris var. cicla L.), que é uma planta cultivada amplamente difundida na Turquia. É utilizada como planta comestível, e suas folhas têm uso antidiabético na medicina tradicional. Mostramos que os elementos traqueais, que são o valores taxonômico da
Planta daninha. Publicado em: 04/11/2019
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2. Singular surfaces of revolution with prescribed unbounded mean curvature
Abstract: We give an explicit formula for singular surfaces of revolution with prescribed unbounded mean curvature. Using this mean curvature, we give conditions for certain types of singularities of those surfaces. Periodicity of that surface is also discussed.
An. Acad. Bras. Ciênc.. Publicado em: 02/09/2019
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3. Hypnea musciformis (Wulfen) J. V. Lamour. (Gigartinales, Rhodophyta) responses to gasoline short-term exposure: biochemical and cellular alterations
ABSTRACT Presence of toxic compounds in marine coastal waters has increased exponentially since Industrial Revolution. In this way, we aimed to evaluate biochemical and physiological changes occurring within Hypnea musciformis after short-term exposure to gasoline. Hypnea musciformis was cultivated without gasoline and then exposed to various concentrations
Acta Bot. Bras.. Publicado em: 31/01/2019
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4. A busca pelo copo ideal: um estudo de otimização em transferência de calor
Resumo Neste trabalho é apresentada uma análise térmica do problema de um líquido contido em um copo sendo aquecido pelo ambiente enquanto é consumido. O problema foi sugerido pelo consumo de bebidas como a cerveja, que se deseja manter o mais fria possível ao longo do consumo. O estudo propõe um meio passivo para a solução do problema, otimizando o
Rev. Bras. Ensino Fís.. Publicado em: 21/01/2019
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5. Carbon and nitrogen stocks and greenhouse gases emissions from sugarcane areas in the Piracicaba region / Estoques de carbono e nitrogênio e emissões de gases do efeito estufa em áreas de cana-de-açúcar na região de Piracicaba
Concentrations of greenhouse gases (GHG), such as carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O), have increased since Industrial Revolution and the agricultural sector significantly contributes to the mentioned increase. Soils are important sinks of carbon (C) and nitrogen (N) and management practices could release part of these pools to the at
Publicado em: 2010
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6. Single point diamond turning of the tungsten carbide / Usinabilidade do carbeto de tungstênio no torneamento com ferramenta de diamante
The single point diamond turning of the Tungsten Carbide is presented. The motivation for this study is the material´s high hardness and potential application for micromolds. A Tungsten Carbide sample was subjected to tests for determination of cutting parameters to achieve the ductile regime of material removal. Based on experimental results it was conclud
Publicado em: 2009
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7. Irregular polygon partitioning on the biaxial ellipsoid on the surface of the Lambert azimuthal equal-area projection / DIVISÃO DE POLÍGONOS IRREGULARES DO ELIPSÓIDE BIAXIAL NA SUPERFÍCIE DA PROJEÇÃO AZIMUTAL EQUIVALENTE DE LAMBERT
This dissertation supplies the methodology of the measure (area) in the Earth model adopted for Geodesy. This model is the ellipsoid of revolution, in which the system of Cartesian coordinates, the curvilinear coordinate system and the polar coordinate system are described. The coordinate nature in the development of the surface measure calculation is discus
Publicado em: 2007
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8. Avaliação da replicagem de moldes torneados com ferramenta de diamante usando prensagem a quente em polimetilmetacrilato (PMMA) / Evaluation of the replication of molds generated from single point diamond turning using hot embossing in polymethylmethacrylate (PMMA)
In this work, different types of microstructures were generated by single point diamond turning and microindentation for will replicated through the hot embossing. Tests were carried to evaluate the generation these microstructures by two distinct methods: micro-deformation and micro-machining, planned to observe the replication of the mark generated by the
Publicado em: 2006
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9. "Controlabilidade do rolamento de uma esfera sobre uma superfície de revolução" / Controllability of the rolling of a ball over a surface of revolution
This work starts by presenting the classical concepts of rolling (without slipping and without slipping or twisting) of a surface over another one, using the Darboux referential frames of the two surfaces along their contact curves. It shows the equivalence between these concepts with other definitions. In the sequel one studies the controllability in the ro
Publicado em: 2005
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10. Hipersuperficies de coomogeneidade um na esfera euclidiana
In 1994, Podestà and Spiro proved that a compact hypersurface of cohomogeneity one, f : Mn + IRn+1, n _ 4, whose principal orbits are umbilical in M is a hyper surface ofrevolution. In 1996, in his Ph.D. thesis, Seixas weakened the hypothesis of this theorem, proving the result for complete hypersurfaces and extended the result of Podestà and Spiro to the
Publicado em: 2002
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11. Assessing wear and surface roughness of different composite resins after toothbrushing
The aim of this work was to compare the in vitro wear and roughness of different composite resins after toothbrushing. Six resins were tested: Revolution (Kerr), Natural Flow (DFL), Flow It! (Jeneric-Pentron), Fill Magic Flow (Vigodent) - flowable composites, Silux Plus (3M) - microfilled composite, and Z100 (3M) - hybrid composite. Eight disks were prepared
Materials Research. Publicado em: 2001-10
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12. Envelope structure of four gliding filamentous cyanobacteria.
The cell walls of four gliding filamentous Oscillatoriaceae species comprising three different genera were studied by freeze substitution, freeze fracturing, and negative staining. In all species, the multilayered gram-negative cell wall is covered with a complex external double layer. The first layer is a tetragonal crystalline S-layer anchored on the outer