Trigonometric Functions
Mostrando 13-19 de 19 artigos, teses e dissertações.
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13. Effect of potential shape on the density of the impurity states in nanotube
We analyze the effect of the potential shape on the ground state energy of the off-axis neutral donor in GaAs/Ga1-xAl xAs cylindrical nanotube in the presence of the uniform magnetic field applied along the symmetry axis. To take into account the mixing of the low lying subbands we express the wave function as a product of combination of 1s and 2p x,y wave f
Brazilian Journal of Physics. Publicado em: 2006-09
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14. "Funções e polinômios univalentes: algumas propriedades e aplicações" / Univalent functions and polynomials: some properties and applications
O objetivo principal deste trabalho é o estudo das funções univalentes e de suas propriedades. Este estudo é direcionado principalmente aos polinômios univalentes e à investigação de prolemas extremos envolvendo seus coeficientes, seus zeros e suas propriedades geométricas. Encontramos uma relação interessante entre os polinômios univalentes e os
Publicado em: 2006
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15. ARBITRARY CROSS SECTION WAVEGUIDES: ANALYSIS OF MODAL FIELDS AND OF DISCONTINUITIES BETWEEN ARBITRARY CROSS SECTION WAVEGUIDES / GUIAS DE ONDA DE SEÇÃO ARBITRÁRIA: ANÁLISE DE CAMPOS MODAIS E DE DESCONTINUIDADES EM GUIAS DE DIFERENTES SEÇÕES
In the present work, the modal fields and cutoff wavenumbers of arbitrary cross section waveguides are determined using the Rayleigh-Ritz method. Initially, the method is applied to waveguides with cross section approximated by a convex polygon. Polynomial basis functions are used. Such basis functions limit the number of modes that can be computed, since po
Publicado em: 2003
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16. MODELO PARA ANÁLISE DA ESTABILIDADE DE DUTOS EM MEIO ELÁSTICO / ANALYTICAL MODEL FOR STABILITY ANALYSIS OF TUBES ON ELASTIC MEDIA
With the growth and advance of the petroleum industry there is a need for better transportation facilities for liquid and gaseous materials. Concerns are raised with respect to savings in materials in structures and environmental problemas connected with failures and spills. Usual transportation media are cilindrical tubes, functioning as pipelines embedded
Publicado em: 2001
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17. Analise do comportamento dinamico de um veiculo automotivo
The theoretical dynamical behaviour of a four wheel car model is analysed. The physical model with seven degrees of freedom is chosen and after some simplifications the corresponding mathematical model is established. First is studied the dynamical eigenbehaviour of the model for both unloaded and loaded conditions through the obtention of the eigenvalues an
Publicado em: 1989
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18. An Index of Information Content for Genotype Probabilities Derived from Segregation Analysis
A genotype probability index (GPI) is proposed to indicate the information content of genotype probabilities derived from a segregation analysis. Typically, some individuals are genotyped at a marker locus or a quantitative trait locus, and segregation analysis is used to make genotype inferences about ungenotyped relatives. Genotype probabilities for a two-
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19. Genetic Structure of a Population Occupying a Circular Habitat
The geographical structure of a finite population distributed continuously and homogeneously along a circular habit is explored. Selection is supposed to be absent, and the analysis is restricted to a single locus with discrete, non-overlapping generations. Assuming every mutant is new to the population, the rate of decay of genetic variability is obtained,