244 research outputs found
Entre la espada y la pared: el Partido CatĂłlico Nacional en la Ă©poca de Huerta
Como se ha podido ver en pocas pinceladas, los meses de existencia del Partido
CatĂłlico Nacional coincidieron con el inicio de una de las Ă©pocas de la historia de
MĂ©xico más convulsionadas y, especĂficamente, con la dictadura de Victoriano Huerta,
personaje ampliamente repudiado por sus contemporáneos a causa de su alevosa
ascensión al poder y, más aún, del terror que utilizó para conservarlo, asà haya sido
durante poco tiempo.
En esta Ăşltima etapa de su breve historia, dentro del pcn existieron al menos
tres grupos de afiliados: quienes eran propensos a colaborar con el régimen, quienes
lo rechazaban absolutamente y quienes creyeron que, siendo un hecho consumado
que el poder ejecutivo lo ejercerĂa Huerta, habrĂa que darle una oportunidad para
enmendar las cosas y devolver al paĂs su vida institucional a travĂ©s de elecciones
democráticas. Este Ăşltimo grupo, el más numeroso, terminarĂa desilusionándose por
completo a causa de los crĂmenes polĂticos, la disoluciĂłn del congreso y las elecciones
amañadas de octubre de 1913 y, a partir de ese momento, se convertirĂa en uno
más de los actores más crĂticos en contra del gobierno de Huerta.
Como consecuencia de esto, el dictador suprimirĂa el periĂłdico –órgano del
partido– en dos ocasiones –la Ăşltima, definitivamente– y encarcelarĂa primero, para
despuĂ©s desterrar, a los principales lĂderes catĂłlicos. No obstante esto Ăşltimo, al
triunfo de la facción llamada «constitucionalista», levantada en armas para vengar
a Madero, el pcn y con Ă©l muchos catĂłlicos sufrieron una verdadera persecuciĂłn,
acusados de haber sido sostenedores del régimen huertista
Nuclear PDFs from neutrino deep inelastic scattering
We study nuclear effects in charged current deep inelastic neutrino-iron
scattering in the frame-work of a chi^2 analysis of parton distribution
functions. We extract a set of iron PDFs and show that under reasonable
assumptions it is possible to constrain the valence, light sea and strange
quark distributions. Our iron PDFs are used to compute x_{Bj}-dependent and
Q^2-dependent nuclear correction factors for iron structure functions which are
required in global analyses of free nucleon PDFs. We compare our results with
nuclear correction factors from neutrino-nucleus scattering models and
correction factors for charged lepton-iron scattering. We find that, except for
very high x_{Bj}, our correction factors differ in both shape and magnitude
from the correction factors of the models and charged-lepton scattering.Comment: 25 pages, 10 figures; minor updates to match published versio
The differential outcomes effect using sensory outcomes in a many-to-one matching-to-sample task
The present study was designed to examine the use of sensory outcomes (visual vs. auditory) using a differential outcomes procedure to facilitate learning in a many-to-one matching-to-sample task. For one group of participants (differential outcomes) each correct stimulus-choice sequence was always followed by a different outcome; whereas for the rest of participants (non-differential outcomes) each correct sequence was followed by the same outcome. Participants trained with differential outcomes showed a faster acquisition and higher overall accuracy than participants trained with non-differential outcomes. The results provide a new extension the differential outcomes effect by using sensory outcomes and many-to-one matching to-sample task; applications of the differential outcomes procedure are discussed. 
Clericalismo y anticlericalismo en la Constitución de 1917: un acercamiento al problema a través de los debates del Constituyente
En febrero de 1917 una asamblea constituyente dotĂł a MĂ©xico de una nueva constituciĂłn. En ella se incluyeron numerosas disposiciones que coartaban la libertad religiosa. El análisis de los debates permite conocer que al mismo tiempo que se atacaba a la Iglesia catĂłlica, se recogĂan muchas de sus propuestas en materia social y se utilizaba en las argumentaciones un lenguaje parecido al eclesiástico, lo que permite señalar una nueva especie de clericalismo dentro del anticlericalismo del Constituyente.In February 1917, a constituent Assembly endowed Mexico with a new constitution. It included numerous provisions that restricted religious freedom. The analysis of the debates makes it possible to know that at the same time that the Catholic Church was attacked, many of its proposals in social matters were collected and a language similar to the ecclesiastical was used in the arguments, which allows to point out a new kind of clericalism within the anti-clericalism of the constituent
The impact of new neutrino DIS and Drell-Yan data on large-x parton distributions
New data sets have recently become available for neutrino and antineutrino
deep inelastic scattering on nuclear targets and for inclusive dimuon
production in pp pd interactions. These data sets are sensitive to different
combinations of parton distribution functions in the large-x region and,
therefore, provide different constraints when incorporated into global parton
distribution function fits. We compare and contrast the effects of these new
data on parton distribution fits, with special emphasis on the effects at large
x. The effects of the use of nuclear targets in the neutrino and antineutrino
data sets are also investigated.Comment: 24 pages, 13 figure
Uncertainties in determining parton distributions at large x
We critically examine uncertainties in parton distribution functions (PDFs)
at large x arising from nuclear effects in deuterium F2 structure function
data. Within a global PDF analysis, we assess the impact on the PDFs from
uncertainties in the deuteron wave function at short distances and nucleon
off-shell effects, the use of relativistic kinematics, as well as the use of
less a restrictive parametrization of the d/u ratio. We find that in particular
the d-quark and gluon PDFs vary significantly with the choice of nuclear model.
We highlight the impact of these uncertainties on the determination of the
neutron structure function, and on W boson production and parton luminosity at
the Tevatron and the LHC. Finally, we discuss prospects for new measurements
sensitive to the d-quark and gluon distributions but insensitive to nuclear
corrections.Comment: 37 pages, 13 figures. Final published versio
New parton distributions from large-x and low-Q^2 data
We report results of a new global next-to-leading order fit of parton
distribution functions in which cuts on W and Q are relaxed, thereby including
more data at high values of x. Effects of target mass corrections (TMCs),
higher twist contributions, and nuclear corrections for deuterium data are
significant in the large-x region. The leading twist parton distributions are
found to be stable to TMC model variations as long as higher twist
contributions are also included. The behavior of the d quark as x-->1 is
particularly sensitive to the deuterium corrections, and using realistic
nuclear smearing models the d-quark distribution at large x is found to be
softer than in previous fits performed with more restrictive cuts.Comment: 31 pages, 8 figures. Minor corrections. References added. To appear
in Phys.Rev.
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