Cultivo do milho: clima e solo.

bitstream/CNPMS/15594/1/Com_38.pd

The distribution and nature of soils with low phosphorus in the Brazilian savannas.

Editado por Robert E. Schaffert

On the role of stigmergy in cognition

Cognition in animals is produced by the self- organized activity of mutually entrained body and brain. Given that stigmergy plays a major role in self-organization of societies, we identify stigmergic behavior in cognitive systems, as a common mechanism ranging from brain activity to social systems. We analyze natural societies and artificial systems exploiting stigmergy to produce cognition. Several authors have identified the importance of stigmergy in the behavior and cognition of social systems. However, the perspective of stigmergy playing a central role in brain activity is novel, to the best of our knowledge. We present several evidences of such processes in the brain and discuss their importance in the formation of cognition. With this we try to motivate further research on stigmergy as a relevant component for intelligent systems.info:eu-repo/semantics/acceptedVersio

Interfaces adaptáveis com jQuery.

Um dos grandes desafios, portanto, dos desenvolvedores de sistemas no século XXI é projetar sistemas flexíveis adaptando as interfaces de acordo com necessidades e preferências do usuário para diferentes dispositivos. Além disso, esses designs devem aumentar a eficiência de sistemas de informações utilizando interfaces adaptativas. Nesse contexto, se insere a proposta deste trabalho que propõe o uso da biblioteca javaScript jQuery para criar interfaces interativas

JQuery ou Dojo, qual biblioteca JavaScript usar?

Este trabalho apresenta uma análise comparativa das bibliotecas jQuery (JQUERY, 2011) e Dojo (DOJO, 2011) que possuem códigos de funções, classes, manipulação do Document Object Model (DOM), entre outros, o que facilita o desenvolvimento de aplicações

Critical behaviour of the compactified λϕ4\lambda \phi^4 theory

We investigate the critical behaviour of the $N$-component Euclidean $\lambda \phi^4$ model at leading order in $\frac{1}{N}$-expansion. We consider it in three situations: confined between two parallel planes a distance $L$ apart from one another, confined to an infinitely long cylinder having a square cross-section of area $A$ and to a cubic box of volume $V$. Taking the mass term in the form $m_{0}^2=\alpha(T - T_{0})$, we retrieve Ginzburg-Landau models which are supposed to describe samples of a material undergoing a phase transition, respectively in the form of a film, a wire and of a grain, whose bulk transition temperature ($T_{0}$) is known. We obtain equations for the critical temperature as functions of $L$ (film), $A$ (wire), $V$ (grain) and of $T_{0}$, and determine the limiting sizes sustaining the transition.Comment: 12 pages, no figure