Computer Theory
Mostrando 13-24 de 295 artigos, teses e dissertações.
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13. COEFICIENTES DE TRANSMISSÃO E REFLEXÃO PELO MÉTODO DA AMPLITUDE VARIÁVEL
In this work, a simple derivation of the variable amplitude method using the variation of parameters to solve a differential equation is presented. The variable amplitude method was originally devised by Tikochinsky in 1977, using the quantum theory of scattering. The method is applied to two model potentials, the rectangular potential barrier and the Eckart
Quím. Nova. Publicado em: 2016-08
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14. Thermodynamic Study on the Acid-Base Properties of Antioxidant Compound Ascorbic Acid in Different NaClO4 Aqueous Ethanol Solutions
The proton dissociation equilibria of ascorbic acid were investigated using a combination of spectrophotometric/potentiometric techniques at constant temperature 25.0 ± 0.1 °C. The study was carried out over a wide range of ionic strengths of 0.1-3.0 mol dm-3 NaClO4 in ethanol-water mixture (1:1). The Gran's method was used for glass electrode calibration
J. Braz. Chem. Soc.. Publicado em: 2016-05
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15. Propagation of waves in micropolar generalized thermoelastic materials with two temperatures bordered with layers or half-spaces of inviscid liquid
The aim of the present paper is to study the propagation of Lamb waves in micropolar generalized thermoelastic solids with two temperatures bordered with layers or half-spaces of inviscid liquid subjected to stress-free boundary conditions in the context of Green and Lindsay (G-L) theory. The secular equations for governing the symmetric and skew-symmetric l
Lat. Am. j. solids struct.. Publicado em: 2014-12
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16. A teoria de pearson para a disciplina de química orgânica: um exercício prático e teórico aplicado em sala de aula
We report a didactic experience in teaching Pearson's theory (HSAB) to graduate students in organic chemistry. This approach was based on teaching students how to use computer programs to calculate frontier orbitals (HOMO-LUMO). The suggested level of calculation was a semi-empiric PM3, proving to be efficient for obtaining robust and fast numerical results
Quím. Nova. Publicado em: 2014
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17. Digital technologies in art education: educational perspectives in the era of digital conversion / Tecnologias digitais no ensino de arte: perspectivas educacionais na era da conversÃo digital
The present research aims to reflect upon digital technologies, especially the computer and the Internet, in what concerns the teaching of arts. Initially, the specificities of digital technologies will be presented, their implications as to culture and the arts, as well as their relationship with the theory of complexity. Later, the digital technologies wil
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/10/2012
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18. Hipercinema : elementos para uma teoria formalista do cinema de animação hiperrealista / Hypercinema : elements for a formalist theory of hyperrealist animation cinema
A pesquisa almeja formular uma teoria estética para o cinema de animação hiperrealista. Após completar meio século de existência, a computação gráfica finalmente alcançou um estágio tecnológico no qual o artista dispõe de ferramentas poderosas e flexíveis o suficiente para enfim encarar o desafio de criar filmes com imagens realistas sintética
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/07/2012
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19. Uma plataforma para ensino e treinamento em desenvolvimento de sistemas operacionais / A learning and training platform on operating systems development
This work aims at proposing and developing a learning and training platform on design and implementation of operating systems. After more than a decade of hegemony of a few commercial products, the establishment of free software paradigm and the proliferation of embedded architectures capable of running an operating system (OS) increase the demand for specia
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/06/2012
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20. O pretÃrito imperfeito do indicativo e as perÃfrases imperfectivas de passado em contos literÃrios escritos em espanhol: um estudo sociofuncionalista / Imperfective periphrasis of past and of imperfect of indicative tense in short stories by Spanish writers: a sociofunctional perspective
This dissertation studied the multifunctionality in a sociofunctional perspective of the imperfective past in the Spanish language in the contexts of use of imperfective periphrasis of past and of imperfect of indicative tense. It was also investigated the variation among these forms in the descriptive, habitual, desiderative and narrative functions. The obj
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/05/2012
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21. Modelagem computacional do efeito bystander das radiações ionizantes via autômato celular e técnica Monte Carlo
Until the 1990s it was believed that the DNA was the only target molecule of ionizing radiation. But some observations have questioned this theory. In 1992, the bystander effect was described by Nagasawa and Little. This effect is responsible for a series of answers as death, chromosomal instability or other abnormalities that occur in non-irradiated cells,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2012
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22. Especificação de bibliotecas digitais de objetos complexos / Specification of digital libraries of digital complex objects
Digital libraries are advanced and complex information systems that store, aggregate, and manage correlated information. These systems are used by specific communities to access digital objects of interest. Due to the creation of huge collections of heterogeneous data (in terms of type and format), some of these data are organized in digital complex objects,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2012
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23. Scientific production of entropy and information theory in Brazilian journals
This article aims at giving an overview of the scientific production about Entropy and Information Theory in national periodical publications in Qualis/CAPES. This article is a descriptive research and a bibliometric study with a quantitative approach. Its sample is composed of 31 articles from periodic publications from different areas, such as: Accounting,
JISTEM J.Inf.Syst. Technol. Manag.. Publicado em: 2012-08
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24. 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