Scale Free Networks
Mostrando 1-12 de 31 artigos, teses e dissertações.
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1. Redes complexas de expressão gênica: síntese, identificação, análise e aplicações / Gene expression complex networks: synthesis, identification, analysis and applications
Os avanços na pesquisa em biologia molecular e bioquímica permitiram o desenvolvimento de técnicas capazes de extrair informações moleculares de milhares de genes simultaneamente, como DNA Microarrays, SAGE e, mais recentemente RNA-Seq, gerando um volume massivo de dados biológicos. O mapeamento dos níveis de transcrição dos genes em larga escala é
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/02/2011
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2. Redes complexas em presença de falhas induzidas / Complex networks in presence of induced failures
A necessidade da operação intermitente de redes complexas leva ao estudo das falhas nas redes de topologia livre de escala (Scale-Free) de Barabási-Albert. Neste trabalho introduzem-se as teorias fundamentais ao estudo das redes complexas, além da revisão de vários trabalhos científicos relacionados às falhas e aos mecanismos de contenção destas. U
Publicado em: 2010
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3. Caminhadas determinísticas em redes complexas aplicadas em visão computacional / Determinist walks on complex applied in computer vision
Complex networks have received a growing interest in several areas of knowledge. This growth is mainly due to its flexibility in modeling and simulating topological structures that appear in our daily life. In most cases, complex networks characterization are based on basic measurements such as average degree, hierarchical degree, clustering coefficient, amo
Publicado em: 2010
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4. Estudo da dinâmica de epidemias em redes aleatórias
We present a deterministic model SEIR (susceptible, exposed, infected, recovered) to the dynamics of epidemics of influenza, we calculate its equilibrium points and the basic reproductive number (R0). The results of simulations of the dynamics of contagion are shown, in a population subdivided in demes using three types of complex networks which have the cha
Publicado em: 2009
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5. Um modelo multiescalas de autômatos celulares para pandemia da dengue / A multiscale cellular automata model for the pandemic of Dengue
The dramatic resurgence and emergence of epidemic dengue and dengue hemorragic fever in the last two decades neatly define a global pandemic. The dispersion of dengue viruses combines local infections of humans bited by infective mosquitoes inside a city with long-range transmissions to non-infective vectors that feed the blood of infected people arriving fr
Publicado em: 2009
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6. Ocupação humana e transformação da paisagem na Amazônia brasileira / Human settlement and landscape transformation in the Brazilian Amazon
In this planet, very few environments are free from anthropogenic disturb. The prehistoric populations used to play significant roles for the formation of some kind of landscapes; the consequences of their actions contributed to the present landscape characteristics. At the Amazon, these transformations are inferred from anthropogenic vestiges, such as: (1)
Publicado em: 2008
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7. Dynamic modeling of overload in scale free networks
We introduce a simple dynamic model to investigate the fragmentation of transport networks. The transport properties like as the size of largest connected cluster, the length of the minimum paths and the optimal paths between a pair of nodes of the network were evaluated upon continuously increasing the load on the system. We use two load insertion strategie
Brazilian Journal of Physics. Publicado em: 2007-12
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8. Redes de fusíveis livres de escala para simulação de fratura em materiais compósitos
The study of fracture of composite materials has a distinguished relevance due the broad and ever increasing use of multiphase materials to attend specific needs and/or combine cost and functionality. Theoretical approach to the issue include simplified models, yet many times mathematically unfeasible, providing information of little practical use. As an alt
Publicado em: 2007
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9. Dynamic processes in complex networks / Processos dinamicos em redes complexas
We study the statistical properties of in²uence networks subjected to external perturbations. We consider networks whose nodes have internal states that can assume the values 0 or 1. The internal states can change depending on the state of the neighboring nodes. We let N1 nodes be frozen in the state 1, N0 be frozen in the state 0 and the remaining N nodes
Publicado em: 2007
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10. Contribuições ao estudo das redes complexas: modelo de qualidade
In this work we analyse the implications of using a power law distribution of vertice s quality in the growth dynamics of a network studied by Bianconi anel Barabási. In particular, we start studying the random networks which characterize or are related to some real situations, for instance the tide movement. In this context of complex networks, we investig
Publicado em: 2007
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11. Tuberculose: estudo da formaÃÃo de padrÃes na eliminaÃÃo, contenÃÃo e disseminaÃÃo do bacilo de Koch
Tuberculosis (TB) is an endemic disease caused by an aerobic bacterium named Mycobacterium tuberculosis (Mtb). It is responsible for on third of population infected worldwide and it causes 2.2 millions deaths per year. The most common infection by Mtb occurs by inhalation of microorganisms into the lungs, where they infect mainly alveolar macrophages. The in
Publicado em: 2007
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12. Complex networks characterization: application to relational modeling between internet autonomous systems / Caracterização de redes complexas: aplicação à modelagem relacional entre sistemas autônomos da Internet
Neste trabalho, foram utilizadas técnicas e conceitos tipicamente encontrados em estudos de Redes Complexas, uma sub-área da Física Estatística, para caracterizar a Internet e sua evolução em uma década, de 1998 a 2007. Foi considerada como unidade básica de análise, a estrutura Sistema Autônomo. Nesta caracterização, foram utilizadas várias fer
Publicado em: 2007