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Search Results: 1 - 10 of 252 matches for " Aureliano; "
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Tomada de decis?o em futuros agropecuários com modelos de previs?o de séries temporais
Bressan, Aureliano Angel;
RAE eletr?nica , 2004, DOI: 10.1590/S1676-56482004000100005
Abstract: this research deals with the usefulness of times series models as a tool for buy and sell decisions of the brazilian bm&f future contracts, in dates nearby the expiration. the models considered were arima, artificial neural networks and dynamic linear models. the data corresponds to the weekly quotations of coffee, soybeans and live cattle prices in the spot and futures markets, between 1996 and 1999. the main objective is to calculate the medium returns of each model in buy and sell operations, in way to provide an indication of the potentials or limitations of each one, using the sharpe index as a comparison tool. the results indicate the financial returns are positive in most of the analyzed contracts, indicating the potential use of those models in negotiations of contracts for dates close to expiration, with prominence for operations based in the forecasts of the arima and dynamic linear models.
Some considerations in knowing a sick person
Guedes Aureliano de S
theHealth , 2012,
Thinking about the Mexican Revolution: Philosophy, Culture and Politics in Mexico. 1910-1934
Aureliano Ortega Esquivel
Rupkatha Journal on Interdisciplinary Studies in Humanities , 2010,
Abstract: The commemoration of the two hundredth anniversary of the War of Independence and thecentenary of the Mexican Revolution make this a good moment for some analysis andreflection on the influence that both events have had on the form and the meaning thatMexican intellectual production and cultural institutions have conserved throughout that time.The aim of this essay, is to examine in how, and by what cultural and institutional means, aprocess of historical transformation as violent, convulsive, complex and radical as theRevolution ended up producing a remarkably favourable set of conditions for literature, music,the visual arts, education and, in particular, philosophy, whose earliest developments andcontributions came between 1910 and 1934.
Ignacio Aureliano Machado Brito
Anuário do Instituto de Geociências , 1991,
Os Equinóides Albianos (Cretáceo Inferior) do Brasil e seu Possível Valor Estratigráfico
Ignacio Aureliano Machado Brito
Anuário do Instituto de Geociências , 1991,
Fragmentos de Frankfurt: Ensayos sobre la Teoría crítica
Aureliano Ortega Esquivel
Diánoia , 2012,
A Antropologia Brasileira: breves indaga es sobre a história de um campo em expans o
Waleska de Araujo Aureliano
Boletín de Antropología , 2010,
Abstract: Este texto presenta algunas reflexiones sobre la formación de la antropología en Brasil y de la panorámica actual de la disciplina en el país. También analiza la relación de la antropología brasile a con las demás antropologías periféricas, especialmente la latinoamericana, pues no obstante la proximidad geográfica, política y lingüística, la presencia de las antropologías latinoamericanas es aún muy reducida en la formación del antropólogo brasile o. Así, este artículo hace algunos cuestionamientos sobre los motivos que llevan a ese conocimiento fragmentado y disperso de la producción antropológica en América Latina, a pesar de nuestra proximidad geopolítica y de algunos espacios de diálogo construidos en los últimos a os (como la Reunión de Antropología del Mercosur y la Asociación Latinoamericana de Antropología).
As transforma es no ambiente amaz nico a partir dos interesses do conquistador europeu: as consequências para os povos indígenas
Aureliano Marques Pinheiro
Ciência & Desenvolvimento , 2012,
Abstract: Este artigo contempla uma reflex o sobre o modo de vida dos povos da Amaz nia antes da conquista europeia, a partir da vis o abordada no Handbook e as contraposi es ao mesmo, e, as altera es ocorridas com a presen a do conquistador europeu. Apresentar-se-á aspectos da várzea no cenário amaz nico e sua importancia como via de penetra o para o interior. Aborda-se também que a presen a do conquistador europeu provocou várias formas de envolvimento dos povos indígenas com os n o indígenas e o deslocamento de vários indivíduos indígenas de seus lugares de origem para se estabelecerem em outros lugares, formando comunidades, desestruturando-se e reestruturando-se, implicando na absor o de valores diferentes dos seus. Esse processo de destribaliza o e desterritorializa o transformou o ambiente, a cultura dos povos e suas rela es socioecon micas, ressignificando-as, entre outros aspectos, pela presen a da mercadoria universal, o dinheiro.
Quantum Gravity and Higher Curvature Actions
Martin Bojowald,Aureliano Skirzewski
Physics , 2006, DOI: 10.1142/S0219887807001941
Abstract: Effective equations are often useful to extract physical information from quantum theories without having to face all technical and conceptual difficulties. One can then describe aspects of the quantum system by equations of classical type, which correct the classical equations by modified coefficients and higher derivative terms. In gravity, for instance, one expects terms with higher powers of curvature. Such higher derivative formulations are discussed here with an emphasis on the role of degrees of freedom and on differences between Lagrangian and Hamiltonian treatments. A general scheme is then provided which allows one to compute effective equations perturbatively in a Hamiltonian formalism. Here, one can expand effective equations around any quantum state and not just a perturbative vacuum. This is particularly useful in situations of quantum gravity or cosmology where perturbations only around vacuum states would be too restrictive. The discussion also demonstrates the number of free parameters expected in effective equations, used to determine the physical situation being approximated, as well as the role of classical symmetries such as Lorentz transformation properties in effective equations. An appendix collects information on effective correction terms expected from loop quantum gravity and string theory.
Effective theory for the cosmological generation of structure
Martin Bojowald,Aureliano Skirzewski
Physics , 2008, DOI: 10.1166/asl.2008.008
Abstract: The current understanding of structure formation in the early universe is mainly built on a magnification of quantum fluctuations in an initial vacuum state during an early phase of accelerated universe expansion. One usually describes this process by solving equations for a quantum state of matter on a given expanding background space-time, followed by decoherence arguments for the emergence of classical inhomogeneities from the quantum fluctuations. Here, we formulate the coupling of quantum matter fields to a dynamical gravitational background in an effective framework which allows the inclusion of back-reaction effects. It is shown how quantum fluctuations couple to classical inhomogeneities and can thus manage to generate cosmic structure in an evolving background. Several specific effects follow from a qualitative analysis of the back-reaction, including a likely reduction of the overall amplitude of power in the cosmic microwave background, the occurrence of small non-Gaussianities, and a possible suppression of power for odd modes on large scales without parity violation.
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