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Salvador, Brazil

The Federal University of Bahia is a public university located mainly in the city of Salvador. It is the largest university of the state of Bahia.Students can study there without paying tuition fees, as it is a public university. To join the university they must pass an annual examination, known as the "vestibular". Wikipedia.

Perelo L.W.,Federal University of Bahia
Journal of Hazardous Materials | Year: 2010

Organic pollutants in sediments are a worldwide problem because sediments act as sinks for hydrophobic, recalcitrant and hazardous compounds. Depending on biogeochemical processes these hydrocarbons are involved in adsorption, desorption and transformation processes and can be made available to benthic organisms as well as organisms in the water column through the sediment-water interface. Most of these recalcitrant hydrocarbons are toxic and carcinogenic, they may enter the food-chain and accumulate in biological tissue. Several approaches are being investigated or have been already used to remove organic hydrocarbons from sediments. This paper provides a review on types and sources of organic pollutants as well as their behavior in sediments. It presents the advantages and disadvantages of traditional sediment remediation techniques in use, such as dredging, capping and monitored natural attenuation. Furthermore, it describes new approaches with emphasis on bioremediation, like biostimulation, bioaugmentation and phytoremediation applied to sediments. These new techniques promise to be of lower impact and more cost efficient than traditional management strategies. © 2009. Source

Oliveira B.G.,Federal University of Bahia
Structural Chemistry | Year: 2014

An innovative theoretical study of intermolecular properties of standard hydrogen-bonded complexes of H2O···HCF 3, NH3···HCF3, H 2O···HF, and NH 3···HF is presented in this work. Several computational strategies were used, so initially the MP2/6-311++G(d,p) level of theory was applied to determine the optimized geometries by which the structural parameters, electronic properties, and the stretch vibration modes of these systems were examined. By taking into account the infrared spectrum analysis, the frequency shifted either to the red- or blue-region is the principal interpretation upon formation of intermolecular complexes. Due to this, the analysis of the interaction strengths corroborates with these vibration behaviors, and besides, the Natural Bond Orbital calculations revealed systematic changes in the percentage of the s and p orbitals, by which the stretch deformations on the proton donors (HF and HCF3) could be understood. In advance, it was quoted the appearing of intermolecular covalence in these complexes, and this event could be theoretically discovered through the topological computations based on the Bader's Quantum Theory of Atoms in Molecules. © 2013 Springer Science+Business Media New York. Source

This article, celebrating the 25th anniversary of Brazil's 1988 Constitution, aims to review the country's social policy development, discuss political projects, and analyze challenges for the sustainability of the Unified National Health System (SUS). Based on public policymaking studies, the article revisits the origins of liberal social policy, focused on social assistance, and analyzes the hegemony of U.S. policies targeting poverty and their repercussions for universal policies. After identifying the formulation of political projects in Brazil's democratic transition, it discusses their implications during the various Administrations since 1988, along with the difficulties faced by the National Health System. The article concludes that the political forces occupying government in the last two decades have failed to present a project for the country on the same level as those who drafted the Citizen Constitution. Source

Varandas P.,Federal University of Bahia
Journal of Statistical Physics | Year: 2012

We establish bounds for the measure of deviation sets associated to continuous observables with respect to not necessarily invariant weak Gibbs measures. Under some mild assumptions, we obtain upper and lower bounds for the measure of deviation sets of some non-uniformly expanding maps, including quadratic maps and robust multidimensional non-uniformly expanding local diffeomorphisms. For that purpose, a measure theoretical weak form of specification is introduced and proved to hold for the robust classes of multidimensional non-uniformly expanding local diffeomorphisms and Viana maps. © 2011 Springer Science+Business Media, LLC. Source

Rousseau J.,Federal University of Bahia
Nonlinearity | Year: 2014

In this paper we study the distributions of hitting and return times for observations of dynamical systems. We apply the results to get an exponential law for the distributions of hitting and return times for rapidly mixing random dynamical systems. In particular, this allows us to obtain an exponential law for random expanding maps, random circle maps expanding on average and randomly perturbed dynamical systems. © 2014 IOP Publishing Ltd & London Mathematical Society. Source

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