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Search Results: 1 - 10 of 464880 matches for " Cesar A.; "
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A Educa o Física escolar e LDB: assumindo a responsabilidade na aplica o das leis 10.639/03 e 11.645/08 / Physical Education and school LDB: taking responsibility in the application of laws and 10.639/03 11.645/08
A. Cesar Lins Rodrigues
Reflex?o & A??o , 2010,
Abstract: Esse artigo trás em seu escopo a discuss o sobre o papel da Educa o Física Escolar na aplica o das leis 10.639/03 e 11.645/08. Questionamentos sobre os “porquês” da focaliza o de uma suposta obrigatoriedade às áreas de Educa o Artística e de Literatura e História Brasileiras em detrimento da área da Educa o Física percorrem toda a extens o do texto, procurando, por meio de contundentes argumenta es, buscar uma reflex o mais profunda a respeito do que, por ora, julga-se ser uma lacuna deixada pela lei. Aspectos como as rela es étnico-racias, constru o das subjetividades das meninas e meninos n o-brancos, desconstru o dos discursos hegem nicos, políticas de branqueamento nos períodos pré e pós-abolicionista e currículo multicultural, todos no ambito escolar também s o trazidos à tona, por meio de reflex es provocativas desenvolvidas ao longo dos escritos. Abstract This paper back in its scope to discussion of the role of physical education in law enforcement 10.639/03 and 11.645/08. Questions about the "whys" of focusing on an alleged obligation to the areas of arts education and Brazilian Literature and History at the expense of the Physical Education run the length of the text, looking through forceful arguments, seek a deeper reflection about what, for now, is thought to be a gap left by the law. Aspects such as the ethnic-racias, construction of subjectivities of boys and girls non-whites, deconstruction of hegemonic discourses, policies bleaching in the pre-and post-abolitionist and multicultural curriculum, all within the school are also brought to light through provocative reflections developed over the writings.
EDITORIAL
Umberto Cesar Corrêa
Revista Brasileira de Educa??o Física e Esporte , 2012, DOI: 10.1590/s1807-55092012000300001
Abstract:
Scaling in the Inter-Event Time of Random and Seasonal Systems
Cesar A. Hidalgo R
Physics , 2005, DOI: 10.1016/j.physa.2005.12.035
Abstract: Interevent times have been studied across various disciplines in search for correlations. In this paper we show analytical and numerical evidence that at the population level a power-law can be obtained by assuming poissonian agents with different characteristic times, and at the individual level by assuming poissonian agents that change the rates at which they perform an event in a random or deterministic fashion. The range in which we expect to see this behavior and the possible deviations from it are studied by considering the shape of the rate distribution.
Solutions for a class of fifth-order nonlinear partial differential system
Cesar A. Gomez S.
Physics , 2008,
Abstract: In this paper we use the generalized tanh method to obtain exact solutions for a class of fifth-order nonlinear systems. A particular case is give by the integrable Mikhailov--Novikov--Wang system (MNW). Periodic and soliton solutions are formally derived. The mathematica is used.
Disconnected! The parallel streams of network literature in the natural and social sciences
Cesar A. Hidalgo
Computer Science , 2015,
Abstract: During decades the study of networks has been divided between the efforts of social scientists and natural scientists, two groups of scholars who often do not see eye to eye. In this review I present an effort to mutually translate the work conducted by scholars from both of these academic fronts hoping to unify what has become a diverging body of literature. I argue that social and natural scientists fail to see eye to eye because they have diverging academic goals. Social scientists focus on explaining how context specific social and economic mechanisms drive the structure of networks and on how networks shape social and economic outcomes. By contrast, natural scientists focus primarily on modeling network characteristics that are independent of context, since their focus is to identify universal characteristics of systems instead of context specific mechanisms. In the following pages I discuss the differences between both of these literatures by summarizing the parallel theories advanced to explain link formation and the applications used by scholars in each field to justify the study of networks. I conclude by briefly reviewing the historical sources of these differences and by providing an outlook on how these two literatures may come closer together.
Discovering East Africa's Industrial Opportunities
Cesar A. Hidalgo
Quantitative Finance , 2012,
Abstract: What are East Africa's industrial opportunities? In this article we explore this question by using the Product Space to study the productive structure of five south-east African countries: Kenya, Mozambique, Rwanda, Tanzania and Zambia. The Product Space is a network connecting products that tend to be exported by the same sets of countries. Since countries are more likely to develop products that are close by in the Product Space to the ones that they already produce, the Product Space can be used to help anticipate a country's industrial opportunities. Our results suggest that the most natural avenue for future product diversification for these five south-east African nations resides in the agricultural sector, since all of these nations appear to have productive structures that are pre-adapted to the production of many agricultural products that none of them are currently exporting. We conclude this paper by exploring the potential benefits of further regional economic integration by doing an exercise in which we pull together the productive structures of these five countries. This exercise shows that the products that become more accessible in the combined economy are once again predominantly agricultural. These results suggest that while diversification into all sectors should remain an important long-term goal of the region, the path towards increased diversification in the near future may well lie in a more empowered and diverse agricultural sector.
Updating Geologic Models using Ensemble Kalman Filter for Water Coning Control  [PDF]
Cesar A. Mantilla, Sanjay Srinivasan, Quoc P. Nguyen
Engineering (ENG) , 2011, DOI: 10.4236/eng.2011.35063
Abstract: This study investigated the feasibility of updating prior uncertain geologic models using Ensemble Kalman filter for controlling water coning problems in horizontal wells. Current downhole data acquisition technol-ogy allows continuous updating of the reservoir models and real-time control of well operations. Ensemble Kalman Filter is a model updating algorithm that permits rapid assimilation of production response for res-ervoir model updating and uncertainty assessment. The effect of the type and amount of production data on the updated geologic models was investigated first through a synthetic reservoir model, and then imple-mented on a laboratory experiment that simulated the production of a horizontal well affected by water con-ing. The worth of periodic model updating for optimized production and oil recovery is demonstrated.
Functional N-Representability in 2-Matrix, 1-Matrix, and Density Functional Theories  [PDF]
Eduardo V. Lude?a, F. Javier Torres, Cesar Costa
Journal of Modern Physics (JMP) , 2013, DOI: 10.4236/jmp.2013.43A055
Abstract:
The N-representability conditions on the reduced second-order reduced density matrix (2-RDM), impose restrictions not only in the context of reduced density matrix theory (RDMT), but also on functionals advanced in one-matrix theory such as natural orbital functional theory (NOFT), and on functionals depending on the one-electron density such as those of density functional theory (DFT). We review some aspects of the applications of these N-representability conditions in these theories and present some conclusions.
Interpersonal Angular Relations between Players Constrain Decision-Making on the Passing Velocity in Futsal  [PDF]
Umberto Cesar Corrêa, Luis Vilar, Keith Davids, Ian Renshaw
Advances in Physical Education (APE) , 2014, DOI: 10.4236/ape.2014.42013
Abstract:

The aim of this study was to investigate the influence of interpersonal interactions between players on the regulation of ball passing velocity in the team sport of futsal. For this purpose 28 sequences of play, in which passes were performed between outfield players, were selected from an elite futsal competition and analyzed using TACTO software. Relative angles between attackers and defenders were used to examine interpersonal coordination tendencies that emerged during performance. Results showed that ball passing velocity was constrained by the rate of change of the angle created by the following vectors: “ball carrier-ball receiver” and “ball carrier-ball receiver’s nearest defender”. Passing velocity remained the same when that angular value remained within a critical threshold range between ?18.16°/s to 11.26°/s. Beyond those critical threshold values, angular relations between participants seemed to enter into a new critical state requiring the emergence of a new passing velocity for performance success. The findings of this study allowed us to conclude that passing velocity during competitive performance in futsal was regulated by the rate of change of an angle established by the interaction between the ball carrier to ball receiver vector with the ball carrier to ball receiver’s nearest defender vector.

Experimental approaches for the generation of induced pluripotent stem cells
Cesar A Sommer, Gustavo Mostoslavsky
Stem Cell Research & Therapy , 2010, DOI: 10.1186/scrt26
Abstract: The potential use of embryonic stem cells (ESCs) for cell replacement therapies is limited by ethical concerns and the technical hurdles associated with their isolation from human embryos. In addition, as the genetic identity of the donor egg from which the ESCs are derived most likely will differ from that of potential recipients, patients who receive ESC-derived cells or tissues may face the same complications that result from organ transplantation (for example, immunorejection, graft-versus-host disease, and need for immunosuppression). To circumvent these obstacles, considerable effort has been invested in attempting to derive ESC-like cells by reprogramming somatic cells to an embryonic state. Although exciting results have been achieved by means of somatic cell nuclear transfer, cell fusion, and culture-induced reprogramming [1], these procedures are technically demanding and inefficient and therefore unlikely to become a common approach for producing patient-specific pluripotent cells. In 2006, a major breakthrough was reported in Japan by Takahashi and Yamanaka, who described the generation of induced pluripotent stem cells (iPSCs) from mouse fibroblasts via over expression of defined transcription factors [2]. Shortly afterwards, the original experimental protocol was replicated and optimized by several laboratories, confirming that iPSCs share the gene expression profile, epigenetic modifications, and proliferation rates as well as the pluripotency of ESCs [3]. Importantly, iPSCs were subsequently derived from adult human fibroblasts, providing a feasible way of producing tailor-made pluripotent cells with clinical translational potential [4-7].The fact that iPSCs can be derived from easily accessible somatic cells, such as skin fibroblasts or keratinocytes [8], has opened up new horizons in the field of regenerative medicine [9]. Jaenisch and colleagues [10,11] showed - as proof of principle of the therapeutic potential of iPSCs - the rescue of sickle cel
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