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Search Results: 1 - 10 of 54226 matches for " Jorge;Oliveira "
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O governo do PT e a Alca: política externa e pragmatismo
Oliveira, Amancio Jorge de;
Estudos Avan?ados , 2003, DOI: 10.1590/S0103-40142003000200023
Abstract: the main purpose of this article is to analyse the position of brazil's work party about the free trade area of the americas (ftta). the paper intend to show that the party's position changed between elections run and the beginning of negotiation process because constraints of the process. the paper intend also to foster comprehension toward incentives, positives and negatives, about the brazilian decision take of the ftaa. incentives, by the way, little focused in brazil's debate about this theme.
Copos, trilhos e moedas: a lógica da política comercial brasileira
Amancio Jorge de Oliveira
Meridiano 47 : Boletim de Análise de Conjuntura em Rela??es Internacionais , 2004,
Abstract: a
O governo do PT e a Alca: política externa e pragmatismo
Oliveira Amancio Jorge de
Estudos Avan?ados , 2003,
Abstract: O objetivo deste trabalho é analisar o posicionamento do governo do Partido dos Trabalhadores diante das negocia es da área de Livre Comércio das Américas (Alca). Procura-se mostrar que, entre a campanha eleitoral e a participa o efetiva nas negocia es, a postura do partido sofreu mudan as gra as aos constrangimentos inerentes ao processo negociador. Além disso, o texto tenta analisar potenciais incentivos positivos da ades o e negativos da n o-ades o do Brasil à Alca. Incentivos esses pouco explorados no debate sobre a política comercial brasileira.
Numerical Modeling of Air Pollutants Emitted by Waterway Transportation  [PDF]
Marilia Mitidieri Fernandes de Oliveira, Nelson Francisco Favilla Ebecken, Jorge Luiz Fernandes de Oliveira, Marina Aires
Journal of Geoscience and Environment Protection (GEP) , 2016, DOI: 10.4236/gep.2016.46011
Abstract: The world maritime transportation is suffering a large increase in recent years and as a result of this increased on global trade, there is a consequent increase in waterway transportation and demand for fossil fuels, resulting in emissions of air pollutants. Consequently, the impact of transport emissions on climate change was put on the list of priorities. It has a high fuel demand as a result of continuous use of main engines for propulsion, electricity and heat production. The highest exposure levels of air pollution are found in ports and near them because most of the world fleet is positioned in these areas. The port of Rio de Janeiro city, in the Southeast Brazilian coastal, is inserted in the Guanabara Bay (GB), where the breezes recirculate pollutants in Metropolitan Region of Rio de Janeiro (MRRJ). Therefore, the aim of this research was to use the Brazilian Regional Atmospheric Modeling System (BRAMS) to generate the wind fields in the MRRJ and to calculate the trajectories of pollutants emitted on GB related to the waterway transportation, using a 3D kinematic trajectories model. Results demonstrated that for the periods analysed, the Central and west areas in the coastal region of the Rio de Janeiro city were the local most affected in the summer. In winter the trajectories reached the cities of the Rio de Janeiro and Duque de Caxias. Both in summer and winter, the trajectories followed towards the South Atlantic Ocean in the morning. Conclusions about this study show the need of decision-making process for better management of waterway transportation sector, improving the harmful effects on air quality in cities located in coastal regions.
Development of the Urban Real Estate Market in Ribeir?o Preto during the Old Republic (Brazil, 1889-1930)  [PDF]
Jorge Henrique Caldeira de Oliveira, Julio Manuel Pires, Lélio Luiz de Oliveira
Open Journal of Business and Management (OJBM) , 2019, DOI: 10.4236/ojbm.2019.72036
Abstract: Analysis of urban real estate market is made in the city of Ribeirao Preto, Sao Paulo, Brazil, due to the impact of coffee production and its development in the region.

Productivity of Nations: A Stochastic Frontier Approach to TFP Decomposition
Jorge Oliveira Pires,Fernando Garcia
Economics Research International , 2012, DOI: 10.1155/2012/584869
Abstract: This paper tackles the problem of aggregate TFP measurement using stochastic frontier analysis. We estimate a world production frontier for a sample of 75 countries over a long period. The “Bauer-Kumbhakar” decomposition of TFP is applied to a smaller sample in order to evaluate the effects of changes in efficiency (technical and allocative), scale effects, and technical change. Estimated technical efficiency scores are compared to productivity indexes offered by nonfrontier studies. We conclude that differences in productivity are responsible for virtually all the differences of growth performance between developed and developing nations and that a large part of this is due to allocative efficiency.
Productivity of Nations: A Stochastic Frontier Approach to TFP Decomposition
Jorge Oliveira Pires,Fernando Garcia
Economics Research International , 2012, DOI: 10.1155/2012/584869
Abstract: This paper tackles the problem of aggregate TFP measurement using stochastic frontier analysis. We estimate a world production frontier for a sample of 75 countries over a long period. The “Bauer-Kumbhakar” decomposition of TFP is applied to a smaller sample in order to evaluate the effects of changes in efficiency (technical and allocative), scale effects, and technical change. Estimated technical efficiency scores are compared to productivity indexes offered by nonfrontier studies. We conclude that differences in productivity are responsible for virtually all the differences of growth performance between developed and developing nations and that a large part of this is due to allocative efficiency. 1. Introduction This paper uses an alternative way of measuring total factor productivity based on stochastic frontier analysis (SFA). The great advantage of SFA is the possibility that it offers of decomposing productivity change into parts that have straightforward economic interpretation. Previous studies have attempted to evaluate the efficiency and productivity growth of nations in the context of the so-called technical inefficiency literature, most of which using data envelopment analysis (DEA) techniques for a sample of OECD countries (e.g., F?re et al. [1]). Deliktas and Balcilar [2, 3] have used SFA but in the context of a somewhat restricted time period of analysis (1991–2000) which permits a more comprehensive sample of countries (130-country frontier). However, they do not analyze or provide results about efficiency levels or rates of change of efficiency (or any other component of TFP change) for the great majority of such countries, focusing their analysis only on 25 transition countries. They do not study the role of allocative efficiency either. The main contribution of our paper is to show that a suitable decomposition of TFP can be applied to a fairly large sample of heterogeneous countries for an extensive period of time in order to evaluate not just the roles of technical progress and technical efficiency change, but also scale and allocative efficiency change as determinants of long-term growth. We are not aware at this time of any other SFA study that has produced quantitative results showing that allocative efficiency plays an important role in the economic growth of nations. The stochastic frontier model used in this article assumes the existence of technical inefficiency which evolves following a particular behavior. This allows one to split productivity changes into (i) the change in technical efficiency, which measures the
The Batalin-Tyutin Formalism on the Collective Coordinates Quantisation of the SU(2) Skyrme Model
Wilson Oliveira,Jorge Ananias Neto
Physics , 1995, DOI: 10.1142/S0217751X97002619
Abstract: We apply The Batalin-Tyutin constraint formalism of converting a second class system into a first class system for the rotational quantisation of the SU(2) Skyrme model. We obtain the first class constraint and the Hamiltonian in the extended phase space. The vacuum functional is constructed and evaluated in the unitary gauge and a multiplier dependent gauge. Finally, we discuss the spectrum of the extended theory. The use of the BT formalism on the collective coordinates quantisation of the SU(2) Skyrme model leads an additional term in the usual quantum Hamiltonian that can improve the phenomenology predicted by the Skyrme model.
The non-abelian BFFT formalism for the collective coordinates quantization of the SU(2) Skyrme model
Wilson Oliveira,Jorge Ananias Neto
Physics , 1998, DOI: 10.1016/S0550-3213(98)00477-5
Abstract: The collective coordinates expansion of the Skyrme soliton particle model gives rise to the second class constraints. We use the non-abelian BFFT formalism to convert this system into the one with only first class constraints. Choosing two different structure functions of the non-abelian algebra, we obtain simplified algebraic expressions for the first class non-abelian Hamiltonians. This result shows that the non-abelian BFFT method is, in many aspects, richer than the abelian BFFT formalism. For both of the first class Hamiltonians, we derive the Lagrangians which lead to the new theory. When one puts the extended phase space variables equal to zero, the original Skyrmion Lagrangian is reproduced. The method of the Dirac first class constraints is employed to quantize these two systems. We achieve the same spectrum, a result which confirms the consistency of the non-abelian BFFT formalism.
Does the Weyl ordering prescription lead to the correct energy levels for the quantum particle on the D-dimensional sphere ?
Jorge Ananias Neto,Wilson Oliveira
Physics , 1998,
Abstract: The energy eigenvalues of the quantum particle constrained in a surface of the sphere of D dimensions embedded in a $R^{D+1}$ space are obtained by using two different procedures: in the first, we derive the Hamiltonian operator by squaring the expression of the momentum, written in cartesian components, which satisfies the Dirac brackets between the canonical operators of this second class system. We use the Weyl ordering prescription to construct the Hermitian operators. When D=2 we verify that there is no constant parameter in the expression of the eigenvalues energy, a result that is in agreement with the fact that an extra term would change the level spacings in the hydrogen atom; in the second procedure it is adopted the non-abelian BFFT formalism to convert the second class constraints into first class ones. The non-abelian first class Hamiltonian operator is symmetrized by also using the Weyl ordering rule. We observe that their energy eigenvalues differ from a constant parameter when we compare with the second class system. Thus, a conversion of the D-dimensional sphere second class system for a first class one does not reproduce the same values.
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