24,270 research outputs found
The Political-Economy of Argentinaâs Debacle
In this paper I argue that political-economy considerations âand in particular the identity of the reformers- are central to understanding the Argentine crisis. During the 90´s the main political parties remained attached to populism, and no strong party emerged at the center of the political spectrum. This had two effects in the reform process. First, it severely deteriorated it (efficiency, corruption), reducing the support of the population. Second, when a series of shocks hit the economy the anti-reform camp tried to undo most reforms, and thus convey a message to the population about the ârightâ model of the world.http://deepblue.lib.umich.edu/bitstream/2027.42/39980/2/wp594.pd
The Political-Economy of Argentinaâs Debacle
In this paper I argue that political-economy considerations âand in particular the identity of the reformers- are central to understanding the Argentine crisis. During the 90´s the main political parties remained attached to populism, and no strong party emerged at the center of the political spectrum. This had two effects in the reform process. First, it severely deteriorated it (efficiency, corruption), reducing the support of the population. Second, when a series of shocks hit the economy the anti-reform camp tried to undo most reforms, and thus convey a message to the population about the ârightâ model of the world.Argentina, Currency Crisis, Political Economy of Reform
Building Adaptive Basis Functions with a Continuous SOM
This paper introduces CSOM, a distributed version of the Self-Organizing Map network capable of generating maps similar to those created with the original algorithm. Due to the continuous nature of the mapping, CSOM outperforms the traditional SOM algorithm in function approximation tasks. System performance is illustrated with three examples
Prethermalization Production of Dark Matter
At the end of inflation, the inflaton field decays into an initially
nonthermal population of relativistic particles which eventually thermalize. We
consider the production of dark matter from this relativistic plasma, focusing
on the prethermal phase. We find that for a production cross section
with , the present dark matter abundance is produced
during the prethermal phase of its progenitors. For , entropy
production during reheating makes the nonthermal contribution to the present
dark matter abundance subdominant compared to that produced thermally. As
specific examples, we verify that the nonthermal contribution is irrelevant for
gravitino production in low scale supersymmetric models () and is dominant
for gravitino production in high scale supersymmetry models ().Comment: 12 pages, 4 figure
Geometric back-reaction in pre-inflation from relativistic quantum geometry
The pre-inflationary evolution of the universe describes the beginning of the
expansion from a static initial state, such that the Hubble parameter is
initially zero, but increases to an asymptotic constant value, in which it
could achieve a de Sitter (inflationary) expansion. The expansion is driven by
a background phantom field. The back-reaction effects at this moment should
describe vacuum geometrical excitations, which are studied with detail in this
work using Relativistic Quantum Geometry.Comment: improved versio
Revisiting the two-mass model of the vocal folds
Realistic mathematical modeling of voice production has been recently boosted
by applications to different fields like bioprosthetics, quality speech
synthesis and pathological diagnosis. In this work, we revisit a two-mass model
of the vocal folds that includes accurate fluid mechanics for the air passage
through the folds and nonlinear properties of the tissue. We present the
bifurcation diagram for such a system, focusing on the dynamical properties of
two regimes of interest: the onset of oscillations and the normal phonation
regime. We also show theoretical support to the nonlinear nature of the elastic
properties of the folds tissue by comparing theoretical isofrequency curves
with reported experimental data.Comment: 7 pages, 5 figure
Charged and electromagnetic fields from relativistic quantum geometry
In the Relativistic Quantum Geometry (RQG) formalism recently introduced, was
explored the possibility that the variation of the tensor metric can be done in
a Weylian integrable manifold using a geometric displacement, from a Riemannian
to a Weylian integrable manifold, described by the dynamics of an auxiliary
geometrical scalar field , in order that the Einstein tensor (and the
Einstein equations) can be represented on a Weyl-like manifold. In this
framework we study jointly the dynamics of electromagnetic fields produced by
quantum complex vector fields, which describes charges without charges. We
demonstrate that complex fields act as a source of tetra-vector fields which
describe an extended Maxwell dynamics.Comment: improved versio
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