M Codes
Mostrando 13-24 de 792 artigos, teses e dissertações.
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13. Acopladores de cristais fotÃnicos e acesso mÃltiplo por divisÃo de cÃdigo Ãptico (OCDMA) com pulsos ultracurtos em fibras de Bragg / Photonic crystals couplers and optical code division multiple access (OCDMA) with optical ultra-short pulses in linear fiber Bragg gratings
This paper presents numerical simulation studies of propagation/switching of ultra-short pulses in photonic crystal couplers and Optical Code Division Multiple Access (OCDMA) using Fiber Bragg Grating (FBG). For coding were obtained analytically Gold codes. In the analysis of photonic crystal couplers (microstructured) investigated the properties of the prop
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2012
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14. Streptococcus mutans GlnK protein: an unusual PII family member
Streptococcus mutans is a Gram-positive bacterium present in the oral cavity, and is considered to be one of the leading causes of dental caries. S. mutans has a glnK gene, which codes for a PII-like protein that is possibly involved in the integration of carbon, nitrogen and energy metabolism in several organisms. To characterize the GlnK protein of S. muta
Brazilian Journal of Medical and Biological Research. Publicado em: 2011-05
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15. Sismologia e Rotação ao Longo da Sequência Principal / Asteroseismology and Rotation in the Main Sequence
Asteroseismology provides a unique opportunity to probe the inner properties of stars through the study of stellar oscillations. These oscillations depend on the physics of the cavity where they are formed. However, the stellar rotation introduces an axis of symmetry and lifts the degeneracy of the frequencies, thus hindering the identification. The goal of
Publicado em: 2011
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16. Tamaño poblacional, uso del hábitat y relaciones interespecíficas de Agalychnis spurrelli (anura: hylidae) en un bosque húmedo tropical remanente del noroccidente de Ecuador
Throughout 2006 and 2007, at a small swamp in San Francisco del Cabo, northwestern Ecuador, monthly field expeditions were done to monitor a population of the leaf frog Agalychnis spurrelli with the following aims: (1) to determine population size and annual fluctuation; (2) to determine spatial distributional patterns and microhabitat resource partitioning;
Papéis Avulsos de Zoologia (São Paulo). Publicado em: 2011
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17. Association of pit1 genotypes with growth traits in canchim cattle.
Use of genetic markers can aid on the identification of animals with highest breeding values in beef cattle. The PIT1 gene codes for the Pit-1 transcription factor is essential for the activation of prolactin, growth hormone and PIT1 genes. This research is an investigation of the effect of PIT1- HinfI polymorphism on growth traits of 509 Canchim animals, fr
Scientia Agrícola. Publicado em: 2011
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18. Códigos metacíclicos / Metacyclic Codes
Neste trabalho, estudamos os códigos corretores de erros que são ideais na álgebra de grupo FG(M;N;R) sobre um corpo F de característica 2, onde o grupo subjacente é metacíclico, não abeliano, de ordem ímpar e possui a seguinte apresentação: G(M;N;R) = ‹a, b : aM = bN = 1, ba = aRb›; onde mdc(M;R) = 1, RN = 1(mod M) e R ≠ 1. Utili
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/02/2010
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19. Análise da eficiência dos sistemas de compartimentação vertical externa por afastamento entre janelas e por projeções horizontais segundo as exigências normativas brasileiras / Analysis of the efficiency of the external vertical compartmentation systems for separation between windows and external horizontal projections according to brazilian’s fire safety codes
Os códigos brasileiros de segurança contra incêndio e pânico (SCIP) possuem inúmeras divergências no que tange aos detalhamentos exigidos para a instalação de diversos sistemas de prevenção e proteção. Dentre eles, existe o sistema estrutural de compartimentação vertical externa, o qual prescreve afastamento vertical entre janelas ou construç�
Publicado em: 2010
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20. Codigos esfericos em toros planares / Spherical codes on flat torus
Spherical codes in Euclidean spaces are finite sets of points on the surface of a multidimensional sphere and have been widely studied in connection with the signal transmission over a Gaussian channel. For this purpose one fundamental issue is to maximize the minimum distance between two code points, what is strongly related to the more general problem of s
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/07/2009
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21. Cloning, expression and characterisation of an HtrA-like serine protease produced in vivo by Mycobacterium leprae
Members of the high temperature requirement A (HtrA) family of chaperone proteases have been shown to play a role in bacterial pathogenesis. In a recent report, we demonstrated that the gene ML0176, which codes for a predicted HtrA-like protease, a gene conserved in other species of mycobacteria, is transcribed by Mycobacterium leprae in human leprosy lesion
Memórias do Instituto Oswaldo Cruz. Publicado em: 2009-12
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22. Construction of linear block codes via digital transforms / ConstruÃÃo de cÃdigos de bloco lineares via transformadas digitais
Novas famÃlias de cÃdigos corretores de erros, criados a partir da transformada numÃrica de Fourier (CÃdigos de Fourier) e de transformadas trigonomÃtricas sobre corpos finitos (CÃdigos FFCT tipo 4 par, do inglÃs finite field cosine transform, e CÃdigos FFST tipo 4 par, do inglÃs finite field sine transform), sÃo apresentadas nesta dissertaÃÃo. A
Publicado em: 2009
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23. Um estudo sobre codigos corretores de erros sobre posets / A study on error-correting codes in poset spaces
Neste trabalho abordamos a teoria dos Códigos Corretores de Erros clássica e também os códigos sobre ordens parciais, com algumas comparações entre os dois casos. Enfocamos, particularmente, a definição de Alfabeto, a distância de Hamming, os códigos lineares e a definição de matriz geradora de um código; o estudo dos limitantes de Singleton e d
Publicado em: 2009
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24. Experimental analyisis of a hypersonic waverider.
This work presents the results of shock tunnel tests of a Mach 10 waverider with sharp leading edges. The waverider surface was generated from a conical flowfield with the volume and the viscous lift-to-drag ratio as optimization parameters. A compression and expansion ramps were added to the pure waverider surface in order to simulate the flow over a scramj
Publicado em: 2009