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    Generalising the logistic map through the qq-product

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    We investigate a generalisation of the logistic map as xn+1=1axnqmapxn x_{n+1}=1-ax_{n}\otimes_{q_{map}} x_{n} (1xn1-1 \le x_{n} \le 1, 0<a20<a\le2) where q\otimes_q stands for a generalisation of the ordinary product, known as qq-product [Borges, E.P. Physica A {\bf 340}, 95 (2004)]. The usual product, and consequently the usual logistic map, is recovered in the limit q1q\to 1, The tent map is also a particular case for qmapq_{map}\to\infty. The generalisation of this (and others) algebraic operator has been widely used within nonextensive statistical mechanics context (see C. Tsallis, {\em Introduction to Nonextensive Statistical Mechanics}, Springer, NY, 2009). We focus the analysis for qmap>1q_{map}>1 at the edge of chaos, particularly at the first critical point aca_c, that depends on the value of qmapq_{map}. Bifurcation diagrams, sensitivity to initial conditions, fractal dimension and rate of entropy growth are evaluated at ac(qmap)a_c(q_{map}), and connections with nonextensive statistical mechanics are explored.Comment: 12 pages, 23 figures, Dynamics Days South America. To be published in Journal of Physics: Conference Series (JPCS - IOP

    Representação de células vegetais em duas dimensões.

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    bitstream/CNPDIA/10028/1/CT21_97.pd

    Oportunidades que o agronegócio caju oferece: pasta de amêndoa de castanha-de-caju.

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    bitstream/item/95653/1/COT13003.pd

    La historia de la ciencia como herramienta para la enseñanza de física en secundaria : un ejemplo en calor y temperatura

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    In this work we suggest and analyze some stages of a course on heat and temperature which knowledge of the past of the ideas and the solution provided can enable a better understanding of the content. The hypothesis that guided the planning of activities was that the scientific content studied throughout its history comes closer to the cognitive universe, not only of the student, but of man himself
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