Fractal Analyses
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Classification of polymers insulators hydrophobicity basead on digital image processing
Although the hydrophobicity is usually an arduous parameter to be determined in the field, it has been pointed out as a good option to monitor aging of polymeric outdoor insulators. Concerning this purpose, digital image processing of photos taken from wet insulators has been the main technique nowadays. However, important challenges on this technique still
Materials Research. Publicado em: 27/03/2012
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2. Reconhecimento de PadrÃes AtravÃs de AnÃlises EstatÃsticas e Fractais Aplicadas a Dados de Ensaios NÃo-Destrutivos / Pattern Recognition by Statistical Fluctuation and Fractal Analyses Applied to Nondestructive Testing Data
In this work a procedure is studied for pattern classification related to different types of data, namely: (1) signals obtained from ultrasonic testing ( pulse-echo technique) and magnetic signals obtained from BarkhÃusen noise in samples of ferritic-pearlitic carbon steel tubes which, due to temperature effects, have shown microstructural changes as conseq
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/12/2011
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3. Integrating time series mining and fractals to discover patterns and extreme events in climate and remote sensing databases.
This thesis presents new methods based on fractal theory and data mining techniques to support agricultural monitoring in regional scale, specifically regions with sugar cane fields. This commodity greatly contributes to the Brazilian economy since it is a viable alternative to replace fossil fuels. Since climate influences the national agricultural producti
2010.. Publicado em: 2011
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4. São Paulo Metropolitan Area gated communities: the end of the rich center versus poor suburbia pattern? / Condomínios fechados na Região Metropolitana de São Paulo: fim do modelo centro rico versus periferia pobre?
Gated communities constitute an urban phenomenon that is nowadays spreading all over the Brazilian metropolis. Since the 1980s, we can observe an increasing number of gated communities within the São Paulo Metropolitan Area (SPMA). The gated communities, initially located at suburban areas and used by upper classes, at the present time serve other social cl
Publicado em: 2008
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5. Schistosomal granuloma as a system adaptive complex. Application of fractal dimension in characterization of their geometric properties. / Granuloma esquistossomótico como um sistema adaptativo complexo. Aplicação da dimensão fractal na caracterização de suas propriedades geométricas.
Schistosomal granuloma AS A COMPLEX ADAPTIVE SYSTEM: APPLICATION OF FRACTAL DIMENSION IN THE CHARACTERIZATION OF PROPERTIES GEOMETRIC. Waldemiro de Souza Romagna. [Introduction]. The schistosomal granuloma is a compact, organized collection of migrating cells, which along with cells of the affected organ, arrange themselves in the midst of extracellular matr
Publicado em: 2007
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6. Contribution of the cellular nucleus texture analyses for the differential diagnosis of follicular thyroid lesions: comparison with imunohistochemical / Contribuição da analise de textura do nucleo celular para o diagnostico diferencial de lesões foliculares da tireoide : comparação com marcadores imunoistoquimicos
The differential diagnosis between some thyroid lesions is often difficult to determine, even with permanent sections. The purpose of this study was to find out if chromatin texture analysis contributes to the differential diagnosis of thyroid follicular lesions. We selected slides stained with H-E (hematoxilin-eosin) of 12 hyperplastic adenomatous nodules (
Publicado em: 2007
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7. Contribution of the cellular nucleus texture analyses for the differential diagnosis of follicular thyroid lesions: comparison with imunohistochemical / Contribuição da analise de textura do nucleo celular para o diagnostico diferencial de lesões foliculares da tireoide : comparação com marcadores imunoistoquimicos
O diagnóstico diferencial entre algumas lesões da tireóide é, muitas vezes, difícil de ser determinado, mesmo diante de diversas amostras de tecido. O propósito deste estudo foi o de investigar até que ponto a análise de textura da cromatina em cortes histológicos de rotina contribui para o diagnóstico diferencial entre lesões foliculares da glân
Publicado em: 2007
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8. Análise multivariada da forma do otólito sagita para discriminação de estoques de dourado, Coryphaena hippurus (Pisces : Coryphaenidae), no Nordeste do Brasil / Multivariate analysis of otolith shape for stock discrimiantion of dolphinfish,Coryphaena hippurus (Pisces :Coryphaenidae), in the Northeastern Brazilian coast
The otolith shape of dolphinfish, C. Hippurus, was studied to verify the hypotheses of two stocks in the northeastern Brazilian coast. Eighty two sagittal otoliths were collected from specimens caught by the artisanal fleet in two regions of northestern Brazil (Maranhão MA and Rio Grande do Norte RN coasts), in December of 2003 and April to May of 2004, res
Publicado em: 2005
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9. Modelos de trafego para fluxos gerados pelo protocolo UDP / Traffic models for UDP streams
An important characteristic of the traffic generated by IP protocol is the existence of scaling, since it has great impact on the performance of traffic control mechanism. Therefore, it has been the focus of attention in many researches. The scaling nature of IP traffic has generated lots of controversy. At small time scales the traffic is very irregular and
Publicado em: 2005
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10. Um estudo sobre a construção de fractais em ambientes computacionais e suas relações como transformações geométricas no plano
This research concerns the teaching and learning of Mathematics in the presence of computational tools, particularly in relation to the construction of fractals. The main aim of the work is to contribute to the analysis of the computational transposition process (Balacheff, 1994) of Fractal Geometry in four computational learning environments. The study enta
Publicado em: 2004
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11. Allometric scaling of metabolic rate from molecules and mitochondria to cells and mammals
The fact that metabolic rate scales as the three-quarter power of body mass (M) in unicellular, as well as multicellular, organisms suggests that the same principles of biological design operate at multiple levels of organization. We use the framework of a general model of fractal-like distribution networks together with data on energy transformation in mamm
National Academy of Sciences.
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12. A novel extracellular cyclic lipopeptide which promotes flagellum-dependent and -independent spreading growth of Serratia marcescens.
Serrawettin W2, a surface-active exolipid produced by nonpigmented Serratia marcescens NS 25, was examined for its chemical structure and physiological functions. The chemical structure was determined by degradation analyses, infrared spectroscopy, mass spectrometry, and proton magnetic resonance spectroscopy. Serrawettin W2 was shown to be a novel cyclodeps