Isometry
Mostrando 1-12 de 28 artigos, teses e dissertações.
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1. Allometry and sexual dimorphism of the Neotropical freshwater anomuran Aegla marginata Bond-Buckup & Buckup, 1994 (Crustacea, Anomura, Aeglidae)
Abstract This study analyzes ontogenetic allometry in Aegla marginata Bond-Buckup & Buckup, 1994, a freshwater crustacean, in order to evaluate the growth pattern and the presence of sexual dimorphism, using a multivariate approach. The specimens were sampled from streams in Intervales State Park, São Paulo State, Brazil. For each specimen, we measured the
Nauplius. Publicado em: 05/06/2017
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2. Population biology of the ‘uçá'-crab, Ucides cordatus(Linnaeus, 1763) (Brachyura: Ucididae), in mangroves of the Joanes River, Bahia State, Brazil
ABSTRACTThis study evaluated the population structure, relative growth and morphological maturity size in Ucides cordatus in the Joanes River, Bahia State (Brazil). Crabs were sampled in a fragmented and human-altered mangrove ecosystem in a Brazilian Environmental Protected Area (EPA). A total of 431 crabs were sampled (265 males and 166 females) between Se
Nauplius. Publicado em: 2015-06
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3. Hipersuperfícies do R4 invariantes por um subgrupo de isometrias com curvatura escalar nula / Hypersurfaces of R4 invariant by an isometry subgroup with zero scalar curvature
Nesta dissertação estudamos as hipersuperfícies que possuem curvatura escalar nula. O trabalho teve como foco as hipersuperfícies invariantes por um subgrupo de isometrias, que são obtidas através de uma curva geratriz parametrizada pelo comprimento de arco. Usamos as geratrizes para reduzir as equações diferenciais parciais das curvaturas escalares
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/07/2011
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4. Aspects of nonmetricity in gravity theories
In this work, we show that a class of metric-affine gravities can be reduced to a Riemann-Cartan one. The reduction is based on the cancelation of the nonmetricity against the symmetric components of the spin connection. A heuristic proof, in the Einstein-Cartan formalism, is performed in the special case of diagonal unitary tangent metric tensor. The result
Brazilian Journal of Physics. Publicado em: 2010-12
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5. Comparative study on anterior cruciate ligament reconstruction: determination of isometric points with and without navigation
OBJECTIVES: To compare the accuracy of tunnel placement and graft isometry for anterior cruciate ligament reconstruction performed using a computer-assisted navigation system (Orthopilot) and using traditional instruments. METHODS: The anterior cruciate ligament was removed intact from 36 pairs of human cadaver knees. From each pair, one knee was randomized
Clinics. Publicado em: 2010
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6. Características vegetativas e reprodutivas das plantas e fatores abióticos do meio e suas relações com a alocação de biomassa floral e a seleção sexual em angiospermas / Vegetative and reproductive characteristics of plants and abiotic factors of the environment and their relations with floral biomass allocation and sexual selection in angiosperms
Plants are sessile organisms exposed to the effects of environmental stress. The flowers are fundamental structures in the evolution of angiosperms, because through them is sexual reproduction. For this, the flowers exhibit strategies that help the plant to achieve better reproductive success. Animals visit flowers in search of resources, however, to carry p
Publicado em: 2010
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7. Isometric embeddings of the hyperbolic plane in Euclidean spaces / Mergulhos isométricos do plano hiperbólico em espaços Euclidianos
In this dissertation we present analytic expressions for isometric embeddings of hyperbolic plane (H2; ds) with Riemannian metric ds2 = dx2 + cosh2 (x) dy2 in Euclidean spaces R6 and S8 R9. Besides isometric embeddings, we present analytic expressions for isometries between the Euclidean models of the Poincaré disk, Upper Half-Plane and the model (H; ds) ci
Publicado em: 2009
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8. Ontogenia craniana comparada de Arctocephalus australis, Callorhinus ursinus e Otaria byronia (Otariidae: Pinnipedia)
The search for mechanisms that can generate major morphological changes has led to the study of ontogeny, in part because some kinds of modifications of ontogenies seem an excelent way to generate major phenotypic change. We focus here on Arctocephlaus australis, Callorhinus ursinus and Otaria byronia with the aim of contributing to the understanding of the
Publicado em: 2009
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9. Um modelo de compressão de imagens digitais baseado em quantização vetorial e transformações afins
The fractal compression is an emerging digital image coding technique which explores the self-similarity present in digital images, showing good fidelity between the original image and the reconstructed image, achieving high compression rates. However it has some weaknesses and because it demands a considerable computational complexity commonly is used the a
Publicado em: 2008
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10. Teorema de Decomposição de Cheeger-Gromoll. / Cheeger-Gromoll Splitting theorem.
Demonstramos o Teorema de Decomposição de Cheeger-Gromoll, o qual garante que uma variedade Riemanniana completa ndimensional, com curvatura de Ricci não-negativa, que possui uma linha, pode ser decomposta isometricamente num produto Riemanniano de uma variedade (n-1 )-dimensional com o conjunto dos reais.
Publicado em: 2007
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11. Avaliação clinica e estudo eletromiografico dos musculos masseter e porção anterior do temporal em individuos portadores de disfunção temporomandibular / Clinical assessment and electromyographic study in masseter and anterior portion of temporal muscles in patients with temporomandibular disorder
Temporomandibular dysfunction (TMD) affects muscles and bones and is frequently associated with the presence of para-functional habits. Frequent signs and symptoms include limited mandibular movements, noise, masticatory and speaking difficulty, headaches, facial and cervical pain, and muscle pain in temporomandibular articulation (TMA). Pain is a common exp
Publicado em: 2007
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12. G-variedades riemannianas como hipersuperfícies de formas espaciais.
(See full text for download) It is proved that an isometric immersion f: Mn ! Qn+1 c of a compact Riemannian mani-fold of dimension n 3 into a space form of dimension n + 1 is equivariant with respect to a Lie group homomorsm : Iso0(Mn) ! Iso(Qn+1 c ), where Iso0(Mn) denotes the identity component of the isometry group Iso(Mn) of Mn. For the case Qn+1 c = Rn
Publicado em: 2006