Geometric Transformations
Mostrando 1-12 de 29 artigos, teses e dissertações.
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1. Génesis Semiótica de los Enteros
Abstract The traditional presentation of the integers ring generates difficulties for learning the product with its well-known signs rule. Our working hypothesis is that the solely representation of the product of two natural numbers by the area of a rectangle can hinder the vision of the product of two integers. Referring us to the scheme of Mathematical Wo
Bolema. Publicado em: 2016-04
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2. On the geometric modulation of skin lesion growth: a mathematical model for melanoma
Abstract Introduction Early detection of suspicious skin lesions is critical to prevent skin malignancies, particularly the melanoma, which is the most dangerous form of human skin cancer. In the last decade, image processing techniques have been an increasingly important tool for early detection and mathematical models play a relevant role in mapping the p
Res. Biomed. Eng.. Publicado em: 18/03/2016
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3. Geração de b-splines via FPGA / B-spline generation via FPGA
The b-splines are used in CAD/CAM/CAE systems to represent and define complex curves and surfaces, being adopted by the main computer graphics standards due to features like compact mathematic representation, flexibility and affine transformations. In 3D acquisition systems and integrated CAM-CNC systems, the use of the b-spline in the geometric information
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/08/2012
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4. Potencialidades e possibilidades do ensino das transformações geométricas no Ensino Fundamental
This study intents to examine the possibilities and potential of Geometric Transformations in teaching Elementary School, a few discussed subject in the curriculum of this educational level. Performs a historical survey about the teaching of geometry and notes that the introduction of the theme of change is given from the Movement of Modern Mathematics. Iden
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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5. Instrumentos virtuais de desenho e a argumentação em geometria
This dissertation presents a proposal to work, at school, the deductive reasoning in geometry. The proposal makes use of digital material consisting of virtual drawing tools that perform geometric transformations of translation, reflection, rotation and enlargement. Making use of digital material, it was developed a didactic sequence consists of three stages
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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6. CALCULUS OF AFFINE STRUCTURES AND APPLICATIONS FOR ISOSURFACES / CÁLCULO DE ESTRUTURAS AFINS E APLICAÇÃO ÀS ISOSSUPERFÍCIES
Differential Geometry provides a set of measures invariant under a set of transformations, in particular rigid, affine, and projective. The invariants by rigid motions are using almost all applications of computer graphics and geometric modeling. The affine case, since it is more general, allows to extend these tools. In this work, geometric properties are p
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/08/2011
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7. Geometria e simetrias do emaranhamento
In the present work we present a geometric method to identify and measure the degree of entanglement of a two-qubit state. It is based on writing a map of the system state, from a non-unitary transformation. By introducing new parameters for such 4X4 matrix, the product of eigenvalues, two by two, acquire the form of squared 4D distances, having a Minkowski
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/05/2011
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8. Revisiting privacy preserving clustering by data transformation.
Preserving the privacy of individuals when data are shared for clustering is a complex problem. The challenge is how to protect the underlying data values subjected to clustering without jeopardizing the similarity between objects under analysis. In this short paper, we revisit a family of geometric data transformation methods (GDTMs) that distort numerical
Journal of Information and Data Management. Publicado em: 2011
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9. Estudando matrizes a partir de transformações geométricas
Este trabalho tem como objetivo central a elaboração, implementação e reflexão sobre uma sequência didática para o estudo de matrizes a partir de tranformações geométricas. A sequência didática pretende propiciar ao aluno um estudo que justifique as definições das operações entre matrizes e suas respectivas propriedades, a partir da observaç
Publicado em: 2009
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10. Transformations for proof-graphs with cycle treatment augmented via geometric perspective techniques
O presente trabalho é baseada em dois aspectos fundamentais: (i) o estudo de procedimentos de normalização para sistemas de provas, especialmente para a lógica clássica com dedução natural; e (ii) a investigação de técnicas da perspectiva geométrica aplicadas em propriedades da teoria da prova. Com isso, a motivação específica deste trabalho re
Publicado em: 2009
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11. Possibilidades da aprendizagem de transformações geométricas com o uso do Cabri-Géomètre
This study is fitted in the Technology of Information and Mathematics Educations line of researching according to the teaching board and the geometric learning, in particular about the Plane Geometry Transformations, and has as a goal to present didactic sequences in which the activities that involve a axial symmetry and the symmetry of rotation promote to t
Publicado em: 2008
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12. Areas and contours / Areas e Contornos
We describe here methods for the area estimation of plane regions bounded by simple curves and also some properties of plane transformations which preserve area. In Chapter 1 the area of polygons, described as a sum of determinants, is used to discuss the calculus of the area of plane regions bounded by simple curves approached by polygons adjusted through g
Publicado em: 2008