> Caros colegas, > O prof. Bent Jorgensen (Department of Mathematics and Computer > Science, University of Southern Denmark, Odense, Denmark) > está visitando o Departamento de Ciências Exatas > da ESALQ/USP, no período de 02 a 28/01/2012, em um projeto FAPESP. > Nos dias > - 25/01 das 15 as 17h e > - 26/01 das 10 às 12h > ele irá ministrar o minicurso "Uma Revisão de Modelos Lineares > Generalizados" > > e no dia 26/01 das 15 às 16h irá proferir a palestra > "The Ecological Footprint of Taylor's Universal Power Law" > Abstract > In 1961 L. R. Taylor proposed a power law for the relationship between > the spatial mean and variance of population abundance in biology, > which over time has been observed for a large number of species, as > well as in many other epidemiological, social and physical systems. > Many disparate explanations for the power law have been proposed in > the literature, but no consensus on their adequacy has emerged. We > review the historical background for the power law and some the > controversies surrounding it. We then turn to a possible theoretical > explanation based on the power variance functions of the so-called > Tweedie distributions, along with a new spatial self-similarity > hypothesis. The theory suggests that there are actually two separate > power laws in swing, one describing the spatial variance as a function > of population density, and the other involving the size of the sampled > area. This is confirmed empirically, and in turn leads us to propose a > new log-linear spatial modelling framework with long-range dependence, > which allows simultaneous estimation of the regression parameters and > the two power parameters. We discuss some of the possible > ramifications of these ideas for studying animal abundance data and > other spatial phenomena exhibiting clustering and long-range dependence. > > Cordiais saudações, > Clarice > New email address: clarice.demetrio@usp.br > > -- > Clarice Garcia Borges Demétrio > Departamento de Ciências Exatas > Escola Superior de Agricultura "Luiz de Queiroz" > Universidade de São Paulo, > 13418-900 Piracicaba, SP > New email address: clarice.demetrio@usp.br > Brasil > phone: 55 19 34294144 R216 > > Biometry, the active pursuit of biological knowledge by quantitative > methods.? ? R.A. Fisher, 1948 > -- Clarice Garcia Borges Demétrio Departamento de Ciências Exatas Escola Superior de Agricultura "Luiz de Queiroz" Universidade de São Paulo, 13418-900 Piracicaba, SP New email address: clarice.demetrio@usp.br Brasil phone: 55 19 34294144 R216 Biometry, the active pursuit of biological knowledge by quantitative methods.? ? R.A. Fisher, 1948
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