Infinity
Mostrando 1-12 de 259 artigos, teses e dissertações.
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1. Carotid artery stenosis: to infinity and beyond
Arquivos de Neuro-Psiquiatria. Publicado em: 2022
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2. Radiação térmica e a fórmula de Planck
In this paper, theoretical and experimental research on blackbody thermal radiation is discussed and historically ordered. The main thermal radiation equations following Planck’s revolutionary idea are obtained using the formalism of statistical mechanics. These equations, already well known, are deduced in a very detailed and didactic way in order to faci
Química Nova. Publicado em: 2022
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3. Reciprocating Kinematics of X-Smart Plus, VDW Silver and, iRoot Endodontic Motors: A Comparison Between Real and Set Values
Resumo Este estudo avaliou 3 motores endodônticos, X-Smart Plus (Dentsply Sirona, Ballaigues, Suíça), VDW.Silver Reciproc (VDW GmbH, Munique, Alemanha) e iRoot (Bassi Endodontics, Belo Horizonte, Brasil) em 2 diferentes ajustes de movimento reciprocante. Os movimentos analisados foram: 170° em sentido anti-horário (CCW) e 50° em sentido horário (CW) a
Brazilian Dental Journal. Publicado em: 2022
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4. Diagnostic Value of D-Dimer and INR in Patients Suspected to Have Prosthetic Valve Dysfunction
ABSTRACT Introduction: Prosthetic valve dysfunction is a potentially critical complication of heart valve replacement. An easy and quickly applicable diagnostic procedure is required for recognizing the prosthetic valve dysfunction. The purpose of this study was to prospectively define the diagnostic value of D-dimer and INR level in predicting prosthetic v
Brazilian Journal of Cardiovascular Surgery. Publicado em: 2022
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5. A COSMOLOGIA E COSMOGRAFIA DE ANAXIMANDRO NO IN DE CAELO DE TOMÁS DE AQUINO
RESUMO Anaximandro possui destaque na história da filosofia, conforme o In De caelo de Tomás de Aquino, porque, à luz da racionalidade, ele descobriu os pontos limites do cosmo, na perspectiva do observador, a saber: as estrelas e a Terra, os dois itens mediante os quais o milésio inaugura a cosmologia filosófica e a cosmografia. Este estudo mostra que,
Kriterion. Publicado em: 13/05/2019
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6. Conocimiento Especializado del Profesor de Matemáticas acerca del Infinito
Abstract Infinity is a concept underlying many concepts present in school mathematics. In this article, we explore teachers' knowledge about infinity from the perspective of the professional knowledge, which is used to deal with infinity in a classroom. For that purpose, we use the discussion of vignettes of simulated situations where different kinds of unde
Bolema. Publicado em: 2017-04
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7. Fracture initiation from initial spherical flaws in incompressible propellant materials
The scope of the present article is the study of the fracture initiation from initial spherical flaws in incompressible propellant materials. Using a constitutive law, derived from the neo-Hookean strain energy function, one may deduce the relation between the radial pressure applied at infinity and the corresponding extension ratio, at the surface of the ca
Matéria (Rio J.). Publicado em: 2015-06
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8. Fractional heat conduction with finite wave speed in a thermo-visco-elastic spherical shell
This problem deals with the thermo-elastic interaction due to step input of temperature on the stress free boundaries of a homogeneous visco-elastic orthotropic spherical shell in the context of a new consideration of heat conduction with fractional order generalized thermoelasticity. Using the Laplace transformation, the fundamental equations have been expr
Lat. Am. j. solids struct.. Publicado em: 2014-12
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9. Controle ativo de vibrações em estruturas flexíveis com incertezas paramétricas / Active vibration control of flexible structures with parametric uncertainties
The aim of this dissertation is to study the H-infinity robust control techniques for linear dynamic systems with parametric uncertainties. The finite element method was employed to find the model of the flexible structure. When dealing with the model, parametric uncertainties were considered for natural frequencies and for damping of the structure. The para
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/02/2012
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10. Posicionamento de sensores/atuadores e escolha de funções de ponderação no controle H-infinito de vibrações / Placement of sensors/actuators and selection of weighting functions in H-infinity control of vibrations
In this work it was used the H infinite control to atenuate vibrations in mechanical structures. Linear matrix inequalities are used to find the optimal controller. Sensors and actuators are incorporated into the project. To determine the best place to allocate them in the structure two methods are used: the first is based on the highest closed-loop H infini
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/02/2012
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11. Consistência hidrológica de modelos digitais de elevação (MDE) para definição da rede de drenagem na sub-bacia do horto florestal Terra Dura, Eldorado do Sul, RS
O desenvolvimento da erosão hídrica ocorre em resposta ao modo como a água se move através e sobre uma determinada paisagem. O modelo digital de elevação (MDE) deve, portanto, ser o mais preciso possível, uma vez que constitui a base para a análise do relevo. Este trabalho teve como objetivo definir um modelo digital de elevação hidrologicamente co
Rev. Bras. Ciênc. Solo. Publicado em: 2012-08
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12. Solução da equação Sn multigrupo de transporte dependente do tempo em meio heterogêneo
In this dissertation is presented an analytical solution for the approximation SN transport equation with the time dependent power, to homogeneous plates as to heterogeneous, assuming a multigroup model with isotropic scattering. The main idea involves the following steps, in this order: construction of a solution to the equation mentioned in a homogeneous p
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012