Search results for "Transversality"
showing 6 items of 6 documents
Education for Health in Spanish education laws: comparative between the LOE and the LOMCE
2018
RESUMEN Fundamentos: La actual Ley Orgánica para la Mejora de la Calidad Educativa (LOMCE) incorpora cambios sustanciales con respecto a la ley anterior, especialmente una nueva configuración del currículum con mayor optatividad, que puede afectar al desarrollo de las competencias de Salud por parte del alumnado. El objetivo fue evaluar el tratamiento de la Educación para la Salud (EpS) en las dos últimas leyes educativas españolas, en base a la variabilidad y cantidad de términos relacionados con Salud que recogen. Métodos: Se realizó un análisis cuantitativo comparativo basado en la presencia de 281 términos relativos a ocho ámbitos de la EpS en ambas leyes y para las dos etapas de educac…
Cubic interactions of Maxwell-like higher spins
2017
We study the cubic vertices for Maxwell-like higher-spins in flat and (A)dS background spaces of any dimension. Reducibility of their free spectra implies that a single cubic vertex involving any three fields subsumes a number of couplings among different particles of various spins. The resulting vertices do not involve traces of the fields and in this sense are simpler than their Fronsdal counterparts. We propose an extension of both the free theory and of its cubic deformation to a more general class of partially reducible systems, that one can obtain from the original theory upon imposing trace constraints of various orders. The key to our results is a version of the Noether procedure al…
Unquenching the gluon propagator with Schwinger-Dyson equations
2012
In this article we use the Schwinger-Dyson equations to compute the nonperturbative modifications caused to the infrared finite gluon propagator (in the Landau gauge) by the inclusion of a small number of quark families. Our basic operating assumption is that the main bulk of the effect stems from the "one-loop dressed" quark loop contributing to the full gluon self-energy. This quark loop is then calculated, using as basic ingredients the full quark propagator and quark-gluon vertex; for the quark propagator we use the solution obtained from the quark gap equation, while for the vertex we employ suitable Ans\"atze, which guarantee the transversality of the answer. The resulting effect is i…
Gauge-invariant truncation scheme for the Schwinger-Dyson equations of QCD
2008
We present a new truncation scheme for the Schwinger-Dyson equations of QCD that respects gauge invariance at any level of the dressed loop expansion. When applied to the gluon self-energy, it allows for its non-perturbative treatment without compromising the transversality of the solution, even when entire sets of diagrams (most notably the ghost loops) are omitted, or treated perturbatively.
Una pioggia vitale
2021
Pioggia di Libri è una manifestazione promossa da Andrea Sciascia, nell’ambito delle attività didattiche e scientifiche del Dipartimento di Architettura che ha lo scopo di divulgare ed incentivare il rapporto tra gli studenti ed il mondo accademico. Con il presente contributo, l’autore (da delegato alla Didattica per il Dipartimento di Architettura) evidenzia alcune importanti ricadute dirette di questa iniziativa sul piano formativo per gli studenti. Rain of Books is an event promoted by Andrea Sciascia, as part of the educational and scientific activities of the Department of Architecture which aims to disseminate and encourage the relationship between students and the academic world. Wit…
A new rotational integral formula for intrinsic volumes in space forms
2010
A new rotational version of Crofton's formula is derived for the intrinsic volumes of a domain Y in a space form. More precisely, a functional is defined on the intersection between Y and a totally geodesic submanifold (plane) through a fixed point, such that the rotational average of this functional is equal to the intrinsic volumes of Y. Particular cases of interest in stereology are considered for the Euclidean case. © 2009 Elsevier Inc. All rights reserved.