Differential Calculus
Mostrando 25-36 de 50 artigos, teses e dissertações.
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25. EsboÃo do grÃfico de funÃÃo : um estudo semiÃtico
This study aims to investigate students use of different representations while doing function activities, after undertaking a methodological teaching approach based on function graph sketch, in which the geometric perspective is the starting point. The research was theoretically based on the Semiotic Theory of Representation Register of Raymond Duval. In t
Publicado em: 2008
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26. Sobre a passagem do estudo de função de uma variável real para o caso de duas variáveis
Esta pesquisa foi desenvolvida com o objetivo de verificar as dificuldades e saberes manifestados por estudantes relativos à transição do estudo das funções de uma variável para o caso de duas, no que diz respeito às variáveis dependentes e independentes e à interdependência entre elas, ao domínio e o gráfico, à relação entre o gráfico do dom
Publicado em: 2008
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27. A new cryptography method based on the pre-image calculus of chaotic, non-homogeneous and non-additive cellular automata / Um novo método criptográfico baseado no cálculo de pré-imagens de autômatos celulares caóticos, não-homogêneos e não-aditivos
A new cryptographic method based on cellular automata (CA) has been investigated. In this method, the ciphering process is performed by preimages computation while deciphering is performed by CA temporal evolution. The preimages calculus is able to be used in a cryptographic system only if any arbitrary CA lattice has at least one preimage. In a previous met
Publicado em: 2007
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28. Nonhomogeneous semilinear elliptic systems / Sistemas elipticos semilineares não-homogeneos
Neste trabalho consideramos duas classes de sistemas não homogêneos sendo que em certos casos uma dessas classes tranforma-se em um sistema gradiente, enquanto que a outra em um sistema de tipo Hamiltoniano. Analisamos as questões de existência, não-existênca, unicidade e multiplicidade de solu-ções.Para obter nossos resultados empregamos o método d
Publicado em: 2007
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29. A limit-method for solving period problems on minimal surfaces / Metodo limite para solução de problemas de periodos em superficies minimas
In this work we present the study and construction of minimal surfaces through an exclusive method. In 1762, Lagrange introduced the Minimal Surfaces Diferential Equation through the Calculus of Variations, and today the theory of such surfaces builds up an active and broad research area. We obtain new families of minimal surfaces based upon the Reverse Cons
Publicado em: 2007
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30. Existencia e multiplicidade de soluções para a Equação de Schrodinger não-linear em Rn / Existence and multiplicity of solutions for the non-linear Schrodinger Equation in Rn
In this dissertation we get resulted of multiplicity of not trivial weak solutions for the problem -Du + V (x)u = f (x; u); x 2 RN; where V is continuous, f is C1, with f (x; 0) = 0 and f is asymptotically linear. We use variationals methods and the theory of critical groups, to get and to distinguish the solutions. We also present results of existence of no
Publicado em: 2007
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31. Martingales no fibrado de bases e seções harmonicas via calculo estocastico / Martingales in frame bundles and harmonic sections through stochastic calculus
Neste trabalho estudamos os martingales no fibrado de bases e suas relações com os martingales no fibrado tangente. Caracterizamos as aplicações harmônicas a valores no fibrado de bases e as relacionamos com as aplicações harmônicas a valores no fibrado tangente. Numa segunda parte estudamos a harmonicidade das seções de um fibrado via geometria es
Publicado em: 2007
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32. Conhecimentos Mobilizados por alunos sobre a Noção Integral no contexto das Concepções Operacionais e Estruturais
The aim of this research was to investigate the knowledge mobilized by those students who have studied Integral, a subject that permeates a major part of the Integral and Differential Calculus (IDC) course and is a source of difficulties for the students. The goal was to analyze the explicit knowledge of those who have studied this concept in a regular IDC c
Publicado em: 2007
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33. Modelagem matemática X aprendizagem significativa : uma investigação usando mapas conceituais
We present the results of a research work based on the theoretical presumptions of Mathematical Modelling in the perspectives of Mathematical Education, Meaningful Learning Theory of David Ausubel and Concepts Maps of Joseph Novak. We previously established a set of elements through which it is possible to elicit the occurrence of Meaningful Learning through
Publicado em: 2007
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34. Computer simulation of the stochastic dynamics of super-paramagnetic particles in ferrofluids
Several papers have been written on the complex problem of the stochastic dynamics of the magnetic moments of super-paramagnetic particles, simultaneously with the stochastic rotation of these colloidal particles in a ferrofluid [1-3]. None of these works, however, is sufficiently general and conveniently simple and clear to be used in sumulational works to
Brazilian Journal of Physics. Publicado em: 2006-09
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35. Formação de formadores de professores de matemática: Identificação de possibilidades e limites da estratégia de organização de grupos colaborativos
The purpose of this work is to understand the possibilities to construct a work group of the collaborative type, from a collective work group, constituted of formers of teachers who teach the discipline of Differential and Integral Calculus, in an institution that has the individualism as its scholar culture. The theoretical referential of the study integrat
Publicado em: 2006
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36. The contend between Newton and Leibniz about Calculus, a divergence analysed about the correspondence in Royal Society / Disputa entre Newton e Leibniz sobre o calculo: uma divergência, analisada sobre as correspondências na Royal Society
In this work we present, in a general and summarized way, the differential and integral calculus origin, developing an examination particularly on thinkers and mathematicians works, among these the English Sir Isaac Newton and the German Baron Gottfried Hilhelm von Leibniz, through their correspondences. How and why Newton and Leibniz thought on the key conc
Publicado em: 2006