855 resultados para dynamic systems theory


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In this paper, we asked whether a new interpretation given by Cardinal Joseph Ratzinger - Benedict XVI - to Vatican Council II, the Hermeneutics of Continuity can have an impact or have impacted yet the musical practice of the Roman Catholic liturgy. According to the Hermeneutics of Continuity, the council shall not constitute a break with previous liturgical practices, but a continuation of an organic movement. The analyses of data obtained from the literature and documentary procedures presented here were based on social autopoietic systems theory by Niklas Luhmann and on the concept of invented tradition by Eric Hobsbawm. We conclude that the Hermeneutics of Continuity has proved to be more a reform of the reform than the reconciliation between two musical and liturgical practices.

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Discusses the concepts occupational knowledge and scientific knowledge, taking into account the existence of the field of Information Science formed by sub-professional and scientific fields. Displays incursions in profession sociology and systems theory of profession, in order to expand the vision of the knowledge base among information professionals.

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Pós-graduação em Psicologia do Desenvolvimento e Aprendizagem - FC

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Synchronization in nonlinear dynamical systems, especially in chaotic systems, is field of research in several areas of knowledge, such as Mechanical Engineering and Electrical Engineering, Biology, Physics, among others. In simple terms, two systems are synchronized if after a certain time, they have similar behavior or occurring at the same time. The sound and image in a film is an example of this phenomenon in our daily lives. The studies of synchronization include studies of continuous dynamic systems, governed by differential equations or studies of discrete time dynamical systems, also called maps. Maps correspond, in general, discretizations of differential equations and are widely used to model physical systems, mainly due to its ease of computational. It is enough to make iterations from given initial conditions for knowing the trajectories of system. This completion of course work based on the study of the map called ”Zaslavksy Web Map”. The Zaslavksy Web Map is a result of the combination of the movements of a particle in a constant magnetic field and a wave electrostatic propagating perpendicular to the magnetic field. Apart from interest in the particularities of this map, there was objective the deepening of concepts of nonlinear dynamics, as equilibrium points, linear stability, stability non-linear, bifurcation and chaos

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In the last 60 years, many Brazilian cities practically doubled their population contingent. As a result of this process, there was an increase on the occupation level on unstable areas, from a physical point of view, and on the anthropogenic interventions at the natural ambient, reorganizing the existent process and forms. Thus, this work shows the results of the analysis of geomorphological changes deriving from urbanization processes at the Lavapés Stream watershed, located at Rio Claro county (SP). The goal of this work was reached by means of historical-evolutionary geomorphological cartography. To achieve this result, it had been prepared geomorphological and land usage charts for the years of 1962, 1988 and 2010, and a declivity chart. Those scenarios have been analyzed from the point of view of the General Systems Theory. The results were attached into an urban use restrictions chart, which allowed identifying the areas that should not be occupied, by geomorphological view and by environmental law restrictions

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The text focuses on the relation between the Law of Directives and Bases of National Education, as well as its deployment in the National Curriculum, and contemporary culture in three aspects: the predominantly naive about the relation between technological development / education, the translation rhetoric about family’s institution as a partner of educational practices, and finally, the use of systems theory applied to the context of politicaleducational diagnosis. Results from a larger research project in progress titled "Cultural Industry and formative processes: Subsidies to reflect the new educational demmands”.

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Fundamentals of Theoretical Ecology and the principles governing ecosystems are discussed in relation to the anthropological concept of culture. These principles have been formed along with the development of Ecology and the advancement of other sciences not necessarily biologically based, such as Mathematics and Physics. A deeper understanding of Ecology in interdisciplinary projects is important because it is both a holistic Science, encompassing several disciplines of the field of knowledge, as a Science, whose principles can be applied to any other science. Its origin and evolution differ from modern sciences that emerged from Renaissance, because, taking place at the turn of the nineteenth to the twentieth century, developing itself along with the theories of systemic thinking at the beginning of this century, Ecology inspired this new thinking, culminating with the emergence of General Systems Theory in search of a "transdisciplinar" unification proposed by today's New Science. By applying the System Theory to the analysis of the behaviors of the individual and of the group, it is possible to approach the Agrarian Reform in a more comprehensive way.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Neural networks are dynamic systems consisting of highly interconnected and parallel nonlinear processing elements that are shown to be extremely effective in computation. This paper presents an architecture of recurrent neural networks for solving the N-Queens problem. More specifically, a modified Hopfield network is developed and its internal parameters are explicitly computed using the valid-subspace technique. These parameters guarantee the convergence of the network to the equilibrium points, which represent a solution of the considered problem. The network is shown to be completely stable and globally convergent to the solutions of the N-Queens problem. A fuzzy logic controller is also incorporated in the network to minimize convergence time. Simulation results are presented to validate the proposed approach.

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Mining activities are directly related to changes in natural landscapes. With the objective of analyzing the changes imposed by the geomorphological dynamics of human action in areas of mining clay, two fragments were selected from the basin of Ribeirão Santa Gertrudes / SP, representing denudational and sedimentation processes respectively. This area is within the context of the Ceramic Pole Santa Gertrudes / SP, which besides its importance as a supplier of raw material, is characterized as the largest center of international reference in ceramic tiles on the American continent. Data was collected and analyzed from the perspective of anthropogenic geomorphology supported by general systems theory and uses techniques from evolutionary geomorphological mapping. Thus, geomorphological mapping were produced concerning three scenarios, which date from 1962, 1988 and 2006 in a scale of 1:10.000. These surveys allowed us to infer a detailed investigation of the evolution of changes in topography and hydrology, geomorphology representative of the original (1962), which has characteristics of an earlier phase of earlier existing large mining pits, and its evolution to a anthropogenic geomorphological stage, represented by active disruption scenarios dating from 1988 and 2006. The last two scenarios have analyzed changes in the dimensions of relief features when compared with the original scenario representative of geomorphology, as well as an intense reallocation of surface and subsurface materials, in which human action is highlighted by becoming responsible for sculpting the landscape through the imposition of control mechanisms to natural processes.