Additive Structures
Mostrando 13-24 de 46 artigos, teses e dissertações.
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13. Método Criptográco Baseado em Autômatos Celulares Bidimensionais para Cifragem de Imagens
This work proposes a new symmetric-key cryptographical model based on von Neumann two-dimensional, heterogeneous and non-additive cellular automata. The encryption process is performed by calculating consecutive pre-images and decryption process by the forward evolution of cellular automata. The proposed model was based on earlier work which used one-dimensi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/12/2010
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14. Busca por estruturas causais no contexto de modelos mistos em genética quantitativa
Structural Equation Models (SEM) can be used to study recursive and simultaneous relationships in multivariate analyses. Nonetheless, the number of different recursive causal structures that can be used for fitting a SEM to multivariate data can be huge, even when only a few traits are considered. In recent applications of SEM in mixed model quantitative gen
Publicado em: 2010
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15. Problemas de estruturas aditivas e multiplicativas propostos em livros didÃticos de matemÃtica: o impacto do Programa Nacional do Livro DidÃtico
This research presents an analysis of how additive and multiplicative problems are presented in Elementary School Mathematics textbooks. The aim of the study is to observe the impact that the PNLD, the Brazilian National Plan of Textbooks, has on the treatment given to the meanings of the arithmetic operations and the forms of symbolic representations presen
Publicado em: 2009
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16. Análise do desempenho de alunos do ensino fundamental em jogos matemáticos: reflexões sobre o uso da calculadora nas aulas de matemática
This research aims to investigate what teaching strategies, considering the use of a calculator in the classroom can become more efficient perception of mistakes in handling additive and multiplicative between students in a 7th grade of elementary school, in the afternoon shift of a State School in Osasco city S.P. (Brazil). This study consisted of a qualita
Publicado em: 2009
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17. Skew normal mixed models in microarray data generated from complex pedigrees / Modelos mistos normais assimÃtricos em dados de microarrays originados de pedigrees complexos / Modelos mistos normais assimÃtricos em dados de microarrays originados de pedigrees complexos / Skew normal mixed models in microarray data generated from complex pedigrees
Estimates of heritability for gene expression are scarce and commonly originated from family structures, in which the variability of responses among and within families are provided under a uniform covariance structure for related individuals, ignoring the known relationship among all individuals in the pedigree. Gauss-Markov normal mixed models are the usua
Publicado em: 2009
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18. Estudo teÃrico da maleimida, seus dÃmeros e trÃmeros / Theoretical Study of Maleimide, its Dimers and Trimers
In this work we have performed MP2 and B3LYP molecular orbital calculations with a 6-31++G(d,p) basis set to analyze and interpret the infrared spectrum of maleimide and its possible hydrogen complexes (dimers and trimers), including their stabilization energies, intermolecular charge transfers and geometric modifications due complexation. The infrared spect
Publicado em: 2008
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19. Avaliação do crescimento de codornas de corte utilizando modelos de regressão aleatória / Evaluation of quail meat growth using random regression models
The data used in this study originates from 26835 and 27447 observations, from 3909 and 4040 meat quails of the UFV-1 and UFV-2 lineage, respectively, pertaining to the Program of Genetic Improvement of Poultry of the Federal University of Viçosa. The characteristic physical weight was evaluated in the two lineages, 1, 7, 14, 21, 28, 35 and 42 days of age,
Publicado em: 2008
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20. Aditivação de pastas geopoliméricas com tetraborato de sódio e látex não iônico para cimentação de Poços de Petróleo
The development of activities in the oil and gas sector has been promoting the search for materials more adequate to oilwell cementing operation. In the state of Rio Grande do Norte, the cement sheath integrity tend to fail during steam injection operation which is necessary to increase oil recovery in reservoir with heavy oil. Geopolymer is a material that
Publicado em: 2007
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21. Leitura, interpretação e resolução de problemas matemáticos de estruturas aditivas
This research, attached to the search line "teaching practices and its relationship with the teacher training," aimed to describe and to analyze the performance and ways of solution of the problems of mathematical addition structures with pupils of the elementary school, related to their reading and their interpretation as a way to identify the relationships
Publicado em: 2007
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22. Design da interaÃÃo de interfaces educativas para o ensino de matemÃtica para crianÃas e jovens surdos
As dificuldades encontradas para aquisiÃÃo de conhecimentos matemÃticos no Ensino Fundamental tÃm acompanhado vÃrias reformas educacionais e podem ser verificadas nos exames nacionais Saeb e Prova Brasil. No caso do estudante surdo, esse quadro acentua-se, devido a uma associaÃÃo de fatores de ordem lingÃÃstica e experiencial, intrÃnsecos à lÃngu
Publicado em: 2007
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23. Expressões Aritméticas: Crenças, Concepções e Competências no entendimento do Professor Polivalente
The present work is to identify and to analyse the beliefs, conceptios and abilities of teachers who teach from first to fourth grade of Basic Education working with arithmetical expressions. In this study we noticed that, the comprehension of a particular groups of situation problems called by mixed structures. In these problems, we have additive and multip
Publicado em: 2006
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24. Explorando a resoluÃÃo de problemas de estruturaaditiva usando diferentes tipos de representaÃÃes :reta numÃrica e material manipulativo
This study assessed the use of different types of representational resources (numerical straight line and manipulative material) in the solving of problems of additive structure in 39 children with an average age of 9 years and 4 months in primary education. The study consisted of a pretest, direct intervention, immediate posttest and later posttest. The chi
Publicado em: 2006