4,713 research outputs found
Downward transference of mice and universality of local core models
If M is a proper class inner model of ZFC and omega_2^M=omega_2, then every
sound mouse projecting to omega and not past 0-pistol belongs to M. In fact,
under the assumption that 0-pistol does not belong to M, K^M \| omega_2 is
universal for all countable mice in V.
Similarly, if M is a proper class inner model of ZFC, delta>omega_1 is
regular, (delta^+)^M = delta^+, and in V there is no proper class inner model
with a Woodin cardinal, then K^M \| delta is universal for all mice in V of
cardinality less than delta.Comment: Revised version, incorporating the referee's suggestion
Effects of electron inertia in collisionless magnetic reconnection
We present a study of collisionless magnetic reconnection within the
framework of full two-fluid MHD for a completely ionized hydrogen plasma,
retaining the effects of the Hall current, electron pressure and electron
inertia. We performed 2.5D simulations using a pseudo-spectral code with no
dissipative effects. We check that the ideal invariants of the problem are
conserved down to round-off errors. Our results show that the change in the
topology of the magnetic field lines is exclusively due to the presence of
electron inertia. The computed reconnection rates remain a fair fraction of the
Alfv\'en velocity, which therefore qualifies as fast reconnection
Making it real:from telling to showing, sharing, and doing in psychiatric education
I posit that those of us in the field of psychiatry have been for too long—perhaps since the inception of our discipline—quick to tell answers yet remiss to show how we got to them. My thesis is an attempt to “get behind the curtain,” to unveil some mysteries that should not have been—nor continue to be.In the thirteen chapters of the thesis, I attempt to redress some of my profession’s enigmatic ways of teaching. My effort has been grounded in the adoption, development, and construction of theory-driven and evidence-informed research infused by the tenets of contemporary medical education
The Revival of Agriculture and Inclusive Growth during the Commodity Boom in Latin America?
Latin America has constituted a recent example of inclusive growth by reducing poverty and income inequality simultaneously during the latest commodity boom. Against the backdrop of non-inclusive and non-transformative nature of commodity booms, we ask whether growth of agriculture was able to speed up structural transformation, and, relatedly, if agricultural growth was inclusive. We examine 16 countries for the period 1994-2014 and find that the increase in agricultural productivity is associated with an increase in both non-agricultural employment during the boom. We also find that income per capita growth has been increasing also among the poor, even if the income elasticities are lower in rural than in urban areas. Focusing on the distribution of agricultural income in Brazil and Colombia between 2003 and 2013, we find that any improvement did go through income for the bottom and the intermediate deciles. Furthermore, formal employment was positively connected to the development of agricultural prices, income improvement of the bottom 40 per cent and the quality of manufacturing exports. In other words, the commodity boom, through agricultural growth, increased linkages across sectors. We conclude that the boom is associated with advances in structural change and moderate inclusive growth rather than mere redistribution
El empleo del tiempo : las mujeres en la LCT
¿Cómo sitúa la Ley de Contrato de Trabajo (LCT) a la mujer en la relación de trabajo? ¿Se encuentra en pie de igualdad con el hombre? O bien ¿Le da un trato especial? de ser así ¿cuáles son las razones? ¿Debería tener en cuenta la LCT el llamado trabajo no remunerado? ¿o solo se trata de una cuestión “doméstica" sobre la cual no debe interceder la legislación?. Esta investigación busca analizar la situación de la mujer que además de trabajar en relación de dependencia realiza actividades en su hogar (trabajo no remunerado), quehaceres domésticos con personas a cargo, hijos, esposo, madre, padre, etc. lo que la primigenia LCT denominaba “mujer con obligaciones familiares" en su art. 215.Fil: Zangrandi, Martin Andrés .
Universidad Nacional de Cuyo. Facultad de Ciencias Políticas y Sociale
Confronting fuzzy dark matter with the rotation curves of nearby dwarf irregular galaxies
We investigate phenomenologically the viability of fuzzy dark matter (FDM).
We do this by confronting the predictions of the model, in particular, the
formation of a solitonic core at the center of dark matter halos, with a
homogeneous and robust sample of high-resolution rotation curves from the
''LITTLE THINGS in 3D'' catalog. This comprises a collection of isolated, dark
matter dominated dwarf-irregular galaxies that provides an optimal benchmark
for cosmological studies. We use a statistical framework based on Markov chain
Monte Carlo techniques that allows us to extract relevant parameters such as
the axion mass, the mass of the solitonic core, the mass of the dark matter
halo and its concentration parameter with a rather loose set of priors except
for the implementation of a core-halo relation that is predicted by
simulations. The results of the fits are used to perform various diagnostics on
the predictions of the model. FDM provides an excellent fit to the rotation
curves of the ''LITTLE THINGS in 3D'' catalog, with axion masses determined
from different galaxies clustering around eV.
However, we find two major problems in our analysis. First, the data follow
scaling relations of the properties of the core which are not consistent with
the predictions of the soliton. This problem is particularly acute in the core
radius - mass relation with a tension that, at face value, has a significance
. The second problem is related to the strong suppression of
the linear power spectrum that is predicted by FDM for the axion mass preferred
by the data. This can be constrained very conservatively by the galaxy counts
in our sample, which leads to a tension exceeding again . We estimate
the effects of baryons in our analysis and discuss whether they could alleviate
the tensions of the model with observations.Comment: 22 pages, 9 figures, 3 table
Creación de artículos en Wikipedia como herramienta de introducción al concepto de web 2.0 para estudiantes de Comunicación Audiovisual
La comprensión de los conceptos básicos que
gobiernan la llamada Web 2.0 es fundamental
para los estudiantes de la titulación de
Comunicación Audiovisual por lo que comporta
de cara a su futuro profesional. La presentación
de estos conceptos se puede realizar de forma
intuitiva y práctica mediante la elaboración de
una experiencia práctica que utiliza como
primera herramienta una wiki y, en una segunda
etapa, la enciclopedia online Wikipedia. Esta
experiencia permite al alumno comprender la
sencillez de uso de las aplicaciones 2.0, la
capacidad de las mismas para generar
contenidos de forma colaborativa y el respeto
que exigen las normas establecidas por las
comunidades que gobiernan el uso de estas
aplicaciones. Un estudio de varias encuestas
cumplimentadas por los alumnos antes y
después de la experiencia demuestra el interés
surgido entre ellos por las aplicaciones 2.0
gracias a la realización de esta experiencia
práctica. El diseño de la experiencia en dos
fases: una con la herramienta software en
entorno local y otra con la misma herramienta
pero en un entorno global resulta innovadora y
facilita la consecución de los objetivos
propuestos.Peer Reviewe
Simulation of Electric Vehicles Combining Structural and Functional Approaches
In this paper the construction of a model that represents the behavior of an Electric Vehicle is described. Both the mechanical and the electric traction systems are represented using Multi-Bond Graph structural approach suited to model large scale physical systems. Then the model of the controllers, represented with a functional approach, is included giving rise to an integrated model which exploits the advantages of both approaches. Simulation and experimental results are aimed to illustrate the electromechanical interaction and to validate the proposal.Fil: Silva, Luis Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Rio Cuarto. Facultad de Ingeniería. Grupo de Electronica Aplicada; ArgentinaFil: Magallán, Guillermo Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Rio Cuarto. Facultad de Ingeniería. Grupo de Electronica Aplicada; ArgentinaFil: de la Barrera, Pablo Martin. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Rio Cuarto. Facultad de Ingeniería. Grupo de Electronica Aplicada; ArgentinaFil: de Angelo, Cristian Hernan. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Rio Cuarto. Facultad de Ingeniería. Grupo de Electronica Aplicada; ArgentinaFil: Garcia, Guillermo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Rio Cuarto. Facultad de Ingeniería. Grupo de Electronica Aplicada; Argentin
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