Symmetry limit properties of a priori mixing amplitudes for non-leptonic and weak radiative decays of hyperons

We show that the so-called parity-conserving amplitudes predicted in the a priori mixing scheme for non-leptonic and weak radiative decays of hyperons vanish in the strong-flavor symmetry limit

Isocausal spacetimes may have different causal boundaries

We construct an example which shows that two isocausal spacetimes, in the sense introduced by Garc\'ia-Parrado and Senovilla, may have c-boundaries which are not equal (more precisely, not equivalent, as no bijection between the completions can preserve all the binary relations induced by causality). This example also suggests that isocausality can be useful for the understanding and computation of the c-boundary.Comment: Minor modifications, including the title, which matches now with the published version. 12 pages, 3 figure

On the generalized Feng-Rao numbers of numerical semigroups generated by intervals

We give some general results concerning the computation of the generalized Feng-Rao numbers of numerical semigroups. In the case of a numerical semigroup generated by an interval, a formula for the $r^{th}$ Feng-Rao number is obtained.Comment: 23 pages, 6 figure

The second Feng-Rao number for codes coming from telescopic semigroups

In this manuscript we show that the second Feng-Rao number of any telescopic numerical semigroup agrees with the multiplicity of the semigroup. To achieve this result we first study the behavior of Ap\'ery sets under gluings of numerical semigroups. These results provide a bound for the second Hamming weight of one-point Algebraic Geometry codes, which improves upon other estimates such as the Griesmer Order Bound

A priori mixing of mesons and the |Delta I|=1/2 rule in K\to\pi\pi

We consider the hypothesis of a priori mixings in the mass eigenstates of mesons to obtain the |Delta I|=1/2 rule in K\to\pi\pi. The Hamiltonian responsible for the transition is the strong interacting one. The experimental data are described using the isospin symmetry relations between the strong coupling constants

Efectividad de la fototerapia en la hiperbilirrubinemia neonatal

Introducción: La ictericia neonatal es la pigmentación amarilla de la piel causada por aumento de bilirrubina en sangre. Los tratamientos más utilizados para la hiperbilirrubinemia han sido la fototerapia y, la fototerapia más fenobarbital. Objetivo: Identificar las mejores evidencias para mejorar el uso y la efectividad de la fototera-pia en el tratamiento de la hiperbilirrubinemia neonatal. Métodos: Se realizó una búsqueda de artículos publicados de 2007 a 2014 con las siguientes palabras clave, hiperbilirrubinemia neonatal, fototerapia de halógenos, fototerapia LEDS, en la Biblioteca Cochrane, en las Bases de datos REDALyC, Scielo, Medline, CINAHL y CUIDEN. Se iden-tificaron 28 artículos relacionados con la efectividad de la fototerapia. Se realizó un análisis de los artículos encontrados. Resultados: La fototerapia con luz de LED tiene mayor eficacia en el control de bilirrubina sobre la fototerapia de halógeno y fibra óptica (diferencia de medias 0.43, IC 95%: 1.91 a 1.05 h). Las sábanas blancas alrededor de la cuna de calor radiante aumentan la eficacia de la fototera-pia; respecto a la protección de los genitales, la literatura menciona que si los niveles de bili-rrubina están muy altos se deberá quitar el pañal, solo cuando se utiliza la fototerapia de LEDS. Con cualquiera de los dispositivos de fototerapia se deberá utilizar protección ocular; se precisa que los cubre bocas o ese tipo de material no es útil para la aplicación de esta.Conclusiones:La fototerapia de mayor efectividad es de LEDS, las sábanas blancas aumentan la efectividad de la fototerapia, se puede quitar el pañal del neonato cuando la bilirrubina haya incrementado

The economic geography of football success: empirical evidence from european cities

Introduction. – 1. The geography of successful football teams: an analytical framework – 2. Empirical analysis – 2.1. Data, model estimation and results – 2.2. Cities and teams: some remarks about market size and teams’ performance – 3. Conclusions – 4. Annex