Rotation Sets
Mostrando 1-12 de 17 artigos, teses e dissertações.
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1. Ergodicidade e homeomorfismos anulares do toro / Ergodicity and annular homeomorphism of the torus
Seja f : T2 ->T2 um homeomorfismo homotópico a identidade e F : R2 ->R2 um levantamento de f tal que seu conjunto de rotação rho(F) é um segmento vertical não degenerado contido em 0 × R. Provamos que se f é ergódico com respeito a medida de Lebesgue no toro e se o vetor de rotação médio (com respeito a mesma medida) é da forma (0, alpha) para al
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/06/2012
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2. Sobre o acoplamento fluido-casca utilizando o método dos elementos finitos / On fluid-shell coupling using the finite element method
This work consists of the development of computational tools for nonlinear geometric fluid-shell interaction analysis using the Finite Element Method (FEM). The fluid solver is explicit and its time integration based on characteristics. The computational code is able to simulate the Navier-Stokes equations for compressible flows written in the Eulerian descr
Publicado em: 2011
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3. Análise de veículos para atividades agrícolas por meio do consumo de combustível e torque na tomada de potência
While investing a new tractor that can live up to their demands, the agrobusiness entrepreneur encounters the difficult task of making a rational choice between different models from different manufacturers. The aim of this work is to develop a tool that provides information for the theoretical comparison between demands of torque and power in a tractor fiel
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2010
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4. Agrupamento de fatores de risco cardiovasculares em população rural, por meio da análise fatorial
Ever since Reaven introduced the concept know as Syndrome X, the clustering of several cardiovascular risk factors, such as: high blood pressure, dyslidaemia, excess of weight, and insulin resistance, has been the subject of keen debate. Evidence suggests that more than one physiologic process mediates the simultaneous development of these metabolic disorder
Publicado em: 2008
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5. SiMCaPe - Sistema para a montagem de cariótipo de peixe baseado em conjuntos difusos
The karyotype study of several organisms has a its objective to observe numerical variations, for detecting specific characteristics and to study the evolution of the species. Manual assembling of karyotype is a repetitive, subjective and time consuming task. This project describes the SiMCaPe, an interactive system for assisting the assembling of fish karyo
Publicado em: 2006
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6. Aplicação de métodos quimiométricos na especiação de Cr(VI) em solução aquosa
The equilibria, the spectra and the identities of the species of Cr(VI) that are present in aqueous solution have long been an active subject of discussion in the literature. In this paper, three different chemometric methodologies are applied to sets of UV/Visible spectra of aqueous Cr(VI) solutions, in order to solve a chemical system where there is no ava
Química Nova. Publicado em: 2001-06
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7. Ensino/Aprendizagem da rotação na 5 série: um estudo comparativo em relação ao material utilizado
Starting from the premise that isometries should be included in the geometry curriculum, this research proposes that we should begin with rotations at 5th grade, by means of strategies of using easily obtainable manipulatives. This investigation compares the achievements of two groups of subjects along a sequence of activities that took place in the classroo
Publicado em: 2001
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8. Passive limitation of adduction after Cüppers's 'Fadenoperation' on medial recti.
In 40 eyes of 20 esotropic subjects in which a 'Fadenoperation' was performed on the medial recti we measured the resistance to ocular rotation in adduction before and after the operation. The difference between the two sets of force measurements demonstrates that the Fadenoperation on medial recti produces a mechanical restriction to adduction which can exp
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9. Comparative Molecular Dynamics Simulation Studies of Protegrin-1 Monomer and Dimer in Two Different Lipid Bilayers
Antimicrobial peptides interact specifically with the membrane of a pathogen and kill the pathogen by releasing its cellular contents. Protegrin-1 (PG-1), a β-hairpin antimicrobial peptide, is known to exist as a transmembrane monomer in a 1,2-dilauroylphosphatidylcholine (DLPC) bilayer and shows concentration-dependent oligomerization in a 1-palmitoyl-2-ol
The Biophysical Society.
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10. Proton nuclear magnetic resonance characterization of heme disorder in hemoproteins.
A proton NMR method is described for determining the orientation of a porphyrin within the heme pocket of a hemoprotein. The pattern of the hyperfine-shifted heme methyl resonances in low-spin ferric model compounds is demonstrated to characteristically reflect the position of a localized low-symmetry perturbation on the pi system. The specific assignments v
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11. In different organisms, the mode of interaction between two signaling proteins is not necessarily conserved
Although interfaces mediating protein–protein interactions are thought to be under strong evolutionary constraints, binding of the chemotaxis histidine kinase CheA to its phosphorylation target CheY suggests otherwise. The structure of Thermotoga maritima CheA domain P2 in complex with CheY reveals a different association than that observed for the same Es
National Academy of Sciences.
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12. Rhodospirillum centenum Utilizes Separate Motor and Switch Components To Control Lateral and Polar Flagellum Rotation
Rhodospirillum centenum is a purple photosynthetic bacterium that is capable of differentiating from vibrioid swimming cells that contain a single polar flagellum into rod-shaped swarming cells that have a polar flagellum plus numerous lateral flagella. Microscopic studies have demonstrated that the polar flagellum is constitutively present and that the late
American Society for Microbiology.