Statements on chaos control designs, including a fractional order dynamical system, applied to a MEMS comb-drive actuator

In this work, we deal with a micro electromechanical system (MEMS), represented by a micro-accelerometer. Through numerical simulations, it was found that for certain parameters, the system has a chaotic behavior. The chaotic behaviors in a fractional order are also studied numerically, by historical time and phase portraits, and the results are validated by the existence of positive maximal Lyapunov exponent. Three control strategies are used for controlling the trajectory of the system: State Dependent Riccati Equation (SDRE) Control, Optimal Linear Feedback Control, and Fuzzy Sliding Mode Control. The controls proved effective in controlling the trajectory of the system studied and robust in the presence of parametric errors.

No rádio e nas telas: o rural da música sertaneja de sucesso e sua versão cinematográfica

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

Perspectivas femininas em Helena Morley e Lygia Fagundes Telles: Minha vida de menina e As meninas

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Trajetórias afetivo-sexuais entre jovens do ensino médio: implicações dos sentidos de amor e maternidade

Pós-graduação em Educação - FCT

O tempo sagrado do Império: história e religião na obra do Cônego Joaquim Caetano Fernandes Pinheiro

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Tempo e devir em convulsão: dimensões da história no cinema de Glauber Rocha (1964-1969)

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

A longa duração e as estruturas temporais em Fernand Braudel: de sua tese O Mediterrâneo e o Mundo Mediterrânico na Época de Felipe II até o artigo História e Ciências Sociais : a longa duração (1949-1958)

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

Jovens urbanos dos povos da Amazônia na cidade de Belém/PA

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Lugares para amizade na sociedade contemporânea: caminhos educativos a partir da obra de Zygmunt Bauman

Pós-graduação em Educação - FFC

Metamorfoses da medicalização e seus impactos na família brasileira

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

O cinema, o tempo social e o seu intérprete

By understanding art as a particular form of knowledge is possible to think that sociology has much to learn from it. One thesis that we share in this essay is that the art is able to perform the synthesis of the historical time for its specifi c capacity to be in the world, because, while scientifi c knowledge search universal categories, intending to reduce as much the infl uence of human and social aspects in the apprehension of phenomena, aesthetic knowledge, even if it seeks abstract referentials, can not get rid of the experience and the world around it. This premise, based on the reading of Fredric Jameson, worth as much to the art authorial as for the one performed in series, this is, the production of the cultural industry. Both one and another, in their own way, translates the social time, task that fi ts to criticism unravel.

Entre improvisos e desafios: do cururu como cosmovisão de grupos caipiras do Médio Tietê, SP

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

Alexandre Herculano e a voz do profeta

The paper discusses briefly the emergence of Alexandre Herculano, intellectual committed to its own historical time and engaged in the process of reorganization of the Portuguese culture through his journalistic activity, in Portuguese literary scene through the publication of The prophet’s voice.

Camponeses Brazil's Peasant Movement in Historical Perspective (1946-2004)

Comparison of the histories of three leading peasant organizations in the Pontal do Paranapanema region of Brazil-the Partido Comunista do Brasil (PCB) from 1945 to 1964, the Confederacao Nacional de Trabalhadores na Agricultura (CONTAG) from 1964 to 1984, and the Movimento dos Trabalhadores Rurais Sem-Terra (MST) from 1984 to 2004-suggests that continuity is as important as change in understanding Brazilian peasant movements. The MST has been considered a "new social movement" in that it has eschewed partisan politics, incorporated families as members rather than just male heads of household, had a national scope and a participatory decision-making structure, and been attuned to the international struggle over globalization. Placing it in historical perspective makes it clear, however, that this is not the first time that militants have organized around the concept of peasants as a political identity; that while the representation of peasants in the leadership of contemporary rural labor organizations may be greater than in the past, earlier peasant leaders also struggled on behalf of their class; that earlier peasant organizations had, if not a national presence, a substantial presence in the agricultural states of the time; and that attempts at international organization to unite peasant struggles around the globe are not entirely new. This is not to deny the innovative features of contemporary movements but to suggest that the investigation of past achievements will contribute to a fuller appreciation of these movements' conditions and prospects.

Historical biogeography and cryptic diversity in the Callichthyinae (Siluriformes, Callichthyidae)

The family Callichthyidae, divided into the subfamilies Corydoradinae and Callichthyinae, contains more than 200 species of armoured catfishes distributed throughout the Neotropics, as well as fossil species dating from the Palaeocene. Both subfamilies are very widely distributed throughout the continent, with some species ranges extending across multiple hypothesized biogeographical barriers. Species with such vast geographical ranges could be made up of multiple cryptic populations that are genetically distinct and have diverged over time. Although relationships among Callichthyinae genera have been thoroughly investigated, the historical biogeography of the Callichthyinae and the presence of species complexes have yet to be examined. Furthermore, there is a lack of fossil-calibrated molecular phylogenies providing a time frame for the evolution of the Callichthyinae. Here, we present a novel molecular data set for all Callichthyinae genera composed of partial sequences of mitochondrial and nuclear markers. These data were used to construct a fossil-calibrated tree for the Callichthyinae and to reconstruct patterns of spatiotemporal evolution. All phylogenetic analyses [Bayesian, maximum likelihood and maximum parsimony (MP)] resulted in a single fully resolved and well-supported hypothesis for the Callichthyinae, where Dianema is the sister group of all the remaining genera. Results suggest that the ancestry of most Callichthyinae genera originated in the Amazonas basin, with a number of subsequent ancestral dispersal events between adjacent basins. High divergences in sequences and time were observed for several samples of Hoplosternum littorale, Megalechis picta and Callichthys callichthys, suggesting that these species may contain cryptic diversity. The results highlight the need for a taxonomic revision of species complexes within the Callichthyinae, which may reveal more diversity within this relatively species-poor lineage. © 2013 Blackwell Verlag GmbH.