Search results for "crisis"

P-Value, Confidence Intervals, and Statistical Inference: A New Dataset of Misinterpretation

2017

Statistical inference is essential for science since the twentieth century (Salsburg, 2001). Since it's introduction into science, the null hypothesis significance testing (NHST), in which the P-value serves as the index of “statistically significant,” is the most widely used statistical method in psychology (Sterling et al., 1995; Cumming et al., 2007), as well as other fields (Wasserstein and Lazar, 2016). However, surveys consistently showed that researchers in psychology may not able to interpret P-value and related statistical procedures correctly (Oakes, 1986; Haller and Krauss, 2002; Hoekstra et al., 2014; Badenes-Ribera et al., 2016). Even worse, these misinterpretations of P-value …

Endeudamiento municipal en la región de Lleida a finales del siglo XVII

2018

Este articulo quiere analizar la evolución del endeudamiento de los municipios de la región económica de Lleida a finales del siglo XVII para poner de relieve no solo el enorme peso que este tuvo sobre los municipios catalanes de los siglos modernos, sino también el efecto que causó la expansión económica de los años previos a la guerra de Sucesión sobre esta deuda. Durante los años estudiados hemos podido observar una mejora evidente sobre el nivel de endeudamiento comunal, pero también la persistencia de problemas crónicos en las finanzas municipales. In this paper is analyzed the municipal debt evolution of the Lleida region during the late seventeenth century. It highlights the importan…

La crisis como esperanza

1979

Dos Congresos y un erizo

1982

Deber de utopia

1984

Las cartas que tenemos

1980

Las cartas que tenemos

1980

Measurement of charged pion double spin asymmetries at midrapidity in longitudinally polarized p+p collisions at s=510  GeV

2020

The PHENIX experiment at the Relativistic Heavy Ion Collider has measured the longitudinal double spin asymmetries, $A_{LL}$, for charged pions at midrapidity ($|\eta|<0.35$) in longitudinally polarized $p+p$ collisions at $\sqrt{s}=510$ GeV. These measurements are sensitive to the gluon spin contribution to the total spin of the proton in the parton momentum fraction $x$ range between 0.04 and 0.09. One can infer the sign of the gluon polarization from the ordering of pion asymmetries with charge alone. The asymmetries are found to be consistent with global quantum-chromodynamics fits of deep-inelastic scattering and data at $\sqrt{s}=200$ GeV, which show a nonzero positive contribution of…

The Proton Spin in the Chiral Bag Model : Casimir Contribution and Cheshire Cat Principle

1998

The flavor singlet axial charge has been a source of study in the last years due to its relation to the so called {\it Proton Spin Problem}. The relevant flavor singlet axial current is anomalous, i.e., its divergence contains a piece which is the celebrated $U_A(1)$ anomaly. This anomaly is intimately associated with the $\eta^\prime$ meson, which gets its mass from it. When the gauge degrees of freedom of QCD are confined within a volume as is presently understood, the $U_A(1)$ anomaly is known to induce color anomaly leading to "leakage" of the color out of the confined volume (or bag). For consistency of the theory, this anomaly should be canceled by a boundary term. This ``color bounda…

Quarks in nuclei

1992

We review some properties of Quantum Chromodynamics, the theory of the hadronic interactions, which serve as guidelines to introduce low energy models of hadron structure. Among these we shall center our attention in the non relativistic quark model and the topological bag model. We present some of their applications to actual problems in experimental and theoretical nuclear physics. In particular we discuss exotic nuclei, quark matter, deep inelastic scattering, proton spin,... and their relation to such phenomena as quark Pauli blocking, strangeness enhancement, nuclear structure functions, bosonization,...