Analytic Geometry
Mostrando 1-12 de 24 artigos, teses e dissertações.
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1. YIG Matrix Based Multiband Magneto-Dielectric Cylindrical Resonator Antenna
Abstract A multiband magneto-dielectric resonator antenna with cylindrical geometry is proposed in this paper. The resonator is composed of yttrium iron garnet (YIG) with chemical composition Y3Fe2(FeO4)3. The final structure is built on a low-cost FR4 dielectric substrate. With only one resonator, the antenna is able to resonate in three distinct controlled
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2021-06
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2. A Compact UWB Monopole Antenna with Rejected WLAN Band using Split-Ring Resonator and Assessed by Analytic Hierarchy Process Method
Abstract The design of a compact microstrip line-fed Ultra-wideband (UWB) monopole antenna with a notched band characteristic is presented in this paper. The rejection frequency band occurs around 5-6 GHz, which is appropriate for wireless local area network (WLAN) applications and is obtained by a split-ring resonator on the antenna ground plane. The propos
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2017-04
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3. Two-parameter Rigid Block Approach to Upper Bound Analysis of Equal Channel Angular Extrusion Through a Segal 2θ-die
This article deals with a phenomenological description of experimentally determined complex geometric shape of material dead zone during Equal Channel Angular Extrusion (ECAE) through a Segal 2θ-die with a channel intersection angle of 2θ>0°and 2θ<180°. Taking into account the complex dead zone geometry in a 2θ-die, a two-parameter Rigid Block Method (
Mat. Res.. Publicado em: 2015-06
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4. 2D upper bound analysis of ECAE through 2θ-dies for a range of channel angles
Equal Channel Angular Extrusion (ECAE), sometimes referred to as Equal Channel Angular Pressing (ECAP), is a Severe Plastic Deformation technique. However the energy-power parameters of ECAE have not been fully addressed in previous known publications. The present article is focused on the punching pressure, accumulated plastic strain, and dead metal zone ge
Mat. Res.. Publicado em: 26/10/2014
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5. The Wits appraisal among a Nigerian sub-population: an assessment of dental base geometric factors
The Wits appraisal is a common linear cephalometric analytic tool established by Jacobson. It has been reported to be superior to angular cephalometric measures as it is not dependent on pericranial structures and their variations both during growth and orthodontic treatment. AIM: To obtain reference values for the Wits appraisal among Nigerians and assess t
Braz. J. Oral Sci.. Publicado em: 2013-12
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6. Fundamentos da geometria complexa: aspectos geométricos, topológicos e analiticos. / Foundations of Complex Geometry: geometric, topological and analytic aspects.
The main goal of this work is to present a detailed study of the foundations of Complex Geometry, highlighting its geometric, topological and analytical aspects. Beginning with a preliminary material, such as the basic results on holomorphic functions in one or more variables and the definition and first examples of a complex manifold, we move on to an intro
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/05/2012
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7. Explorando conceitos de Geometria Analítica Plana utilizando Tecnologias da Informação e Comunicação: uma ponte do Ensino Médio para o Ensino Superior construída na formação inicial de Professores de Matemática / Explorando conceitos de Geometria Analítica Plana utilizando Tecnologias da Informação e Comunicação: uma ponte do Ensino Médio para o Ensino Superior construída na formação inicial de Professores de Matemática
O presente trabalho se propõe a apresentar / discutir o ensino de Geometria Analítica Plana na perspectiva da Educação Matemática nos Ensinos Médio e Superior, visando contribuir para a formação de futuros Professores de Matemática. O trabalho fundamentou-se teoricamente em reflexões de autores que pesquisaram a utilização de Tecnologias de Infor
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/12/2011
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8. APRENDIZAGEM SIGNIFICATIVA, EXPLORANDO ALGUNS CONCEITOS DE GEOMETRIA ANALITICA: Pontos e Retas
This work aims to research the contributions of the using of the investigation and exploitations tasks, with the usage of dynamic geometry software to a meaningful learning of some analytic geometry concepts, limiting itself to dots and lines. As theoretical references were used the ideas of João Pedro da Ponte (exploitation and investigative activities) an
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/06/2011
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9. Um estudo de equações diferenciais aplicado à flexão de vigas / A study of differential equations applied to the flexion of beams
Much of the theory studied in civil engineering is fraught with mathematical concepts, since the analytic geometry, through linear algebra, the differential and integral calculus. The study of applications of ordinary differential equations comprise the main objective of this work by focusing our examples on the bending of beams. This paper aims to elaborate
Publicado em: 2010
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10. O estudo da equação Ax²+By²+Cxy+Dx+Ey+F=0 utilizando o software Grafeq: uma proposta para o ensino médio
A presente dissertação tem como propósito apresentar uma proposta para o ensino e aprendizagem da Geometria Analítica através do uso de tecnologia informática. Tendo a Engenharia Didática como metodologia de pesquisa, concebemos, realizamos e avaliamos uma seqüência didática que trata retas, círculos, elipses, hipérboles e parábolas como as poss
Publicado em: 2010
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11. GeoGebra e moodle no ensino de geometria analítica
Este trabalho consiste na construcao de um ambiente virtual de aprendizagem (AVA) sobre conceitos fundamentais de Geometria Analitica (G.A.), utilizando recursos do Geogebra, para ser aplicado em uma sala do 1o ano de um curso de Licenciatura em Matematica de uma faculdade privada. Ao longo de sua trajetoria o professor desenvolve formas de apresentar as ide
Publicado em: 2010
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12. 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