Wormholes and masses for Goldstone bosons

There exist non-trivial stationary points of the Euclidean action for an axion particle minimally coupled to Einstein gravity, dubbed wormholes. They explicitly break the continuos global shift symmetry of the axion in a non-perturbative way, and generate an effective potential that may compete with QCD depending on the value of the axion decay constant. In this paper, we explore both theoretical and phenomenological aspects of this issue. On the theory side, we address the problem of stability of the wormhole solutions, and we show that the spectrum of the quadratic action features only positive eigenvalues. On the phenomenological side, we discuss, beside the obvious application to the QCD axion, relevant consequences for models with ultralight dark matter, black hole superradiance, and the relaxation of the electroweak scale. We conclude discussing wormhole solutions for a generic coset and the potential they generate.Comment: 50 pages, 15 figures. v2: minor changes, refs adde

Between Planning and Heritage: Cultural Parks and National Heritage Areas

The number of cultural parks and heritage areas is increasing in Europe and the United States. Those are spreading over other areas where the economic sectors related to tourism and leisure gain weight. Heritage areas or parks are heterogeneous initiatives that place cultural heritage at the heart of spatial planning policy and economic development, aiming at the reinvention of large territories and local community participation in planning. Their relevance stems from their potential influence on the territorial configuration of broad regions and their impact upon the articulation of traditional protected areas. Notwithstanding this, they have attracted scant academic attention so far

Analysis of the Machining Process of Titanium Ti6Al-4V Parts Manufactured by Wire Arc Additive Manufacturing (WAAM)

In the current days, the new range of machine tools allows the production of titanium alloy parts for the aeronautical sector through additive technologies. The quality of the materials produced is being studied extensively by the research community. This new manufacturing paradigm also opens important challenges such as the definition and analysis of the optimal strategies for finishing-oriented machining in this type of part. Researchers in both materials and manufacturing processes are making numerous advances in this field. This article discusses the analysis of the production and subsequent machining in the quality of TI6Al4V produced by Wire Arc Additive Manufacturing (WAAM), more specifically Plasma Arc Welding (PAW). The promising results observed make it a viable alternative to traditional manufacturing methods.This research was funded by the vice-counseling of technology, innovation and competitiveness of the Basque Government grant agreement kk-2019/00004 (PROCODA project)

Arrendajo – Garrulus glandarius (Linnaeus, 1758)

Aves - Orden Passeriformes - Familia Corvidae en la Enciclopedia Virtual de Vertebrados Españoles, http://www.vertebradosibericos.org/. Versiones anteriores: 3-04-2006; 18-01-2007; 15-02-2008; 24-02-2010A comprehensive review of the natural history of the jay Garrulus glandarius in Spain.Peer reviewe

Determination of isotopic ratios of uranium (U-235/-U238) for the characterization of reverse osmosis compared with conventional tap water treatment in order to determine the source of a water leak

An analytical technique for the determination of the isotopic ratio of U-235/U-238 in waters by a classical technique based on a quadrupole ICP-MS has been implemented.A high precision (RSD ≤ 0.3 %) has been obtained, whichis strictly necessary in these circumstances. The methodologydeveloped was validated and the results obtained confirmed a slight increase in the uranium isotopic ratio U-235/U-238 for the treated water using reverse osmosis with respect to conventionally treated water. This analytical methodology was applied to characterize different origins of treated water in the Barcelona Area in order to determine the origin of an important water leak. To the best of our knowledge, it is the first time that this isotopic application is used by a tap water distribution company to solve this kind of problem

Del tomismo al suarismo.La cuestión de «la alternativa de cátedras»

A l’inici del seu regnat Felip V es va proposar introduir el pensament de Francisco Suárez com a matèria d’estudi universitari al crear per decret diverses càtedres suaristes a l’Estudi General de Barcelona, a on estava profundament arrelada la doctrina tomista. Aquesta disposició règia va disgustar la comunitat universitària, transcendint a la societat catalana en forma d’una oposició a la dinastia dels Borbons i en defensa de la causa dinàstica dels HabsburgAt the beginning of his reign Philip V implemented the introduction of Francisco Suárez’s thought by the creation of several specifi c chairs (professorships) in the university Estudi General of Barcelona, where Th omism was by then deeply rooted. Th is royal provision disliked the university community, trascending also to a social Catalan debate as part of the opposition to the dynasty of the Bourbons and in defense of the Habsburgs in their succession dispute about the Crown of Spai

Mollusca and Microvertebrata from the Pleistocene terraces of the Tagus River of Toledo and Fuentidueña de Tajo (Central Spain)

The study of the terraces and its associated faunas from the areas of Toledo and Fuentidueña de Tajo in the Valley of the Tagus River, mainly from a palaeoenvironmental point of view, has been made in this work. Six new sites of fossil microvertebrates and fossil molluscs were found when this work was undertaked. Many of the sites with remains of microvertebrates and all the sites with fossil mollucs that were found in that prospecting are presented for the first time in this work. As regards to the last, it can be remarked that all the shells of the molluscs find out are of a very small size. That could be the consequence of the alloctone origin as it happens in the seasonal river side flooding. This suggestion is supported by the presence of freshwater and terrestrial species mixed in the same sample, as, for example, Succinea putris (characteristic biotope of humid areas near the river side), together with Helicella madritensis with a terrestrial habitat. The conditions of life of the twelve species of mollucs here analyzed suggest a temperate climate in the Middle Pleistocene at the time of the sites deposition, similar to the present day in the area. Besides, the presence of Helicella madritensis, a xerophillus species that lives today in the arid areas of the central plateau of the Iberian Peninsula, suggests a climate with large dry periods not very different from now. The habitat of Truncatellina cylindrica (very dry calcareous grassy or rocky places) and that of Vallonia costata (dry open calcareous places) supports the sames suggestions.Peer reviewe

De cuartel militar a laboratorio de vida alternativa: el ecobarrio de Vauban en Friburgo

La experiencia de la ciudad de Friburgo destaca, además de porque lleva décadas gobernada por Los Verdes, y por una gran socialización de las energías renovables, por acoger una experiencia muy innovadora de regeneración urbana: el proceso del ecobarrio Vauban. En 1993 un grupo de jóvenes okupó unos antiguos cuarteles de la OTAN. Tras un proceso de negociación con el Ayuntamiento, obtuvieron permiso para permanecer en algunas de las naves. De esa iniciativa nació SUSI, una cooperativa autogestionada de vivienda para jóvenes y personas con bajos ingresos, así como espacios para iniciativas sociales. El proyecto de la Administración local era demoler el resto para reedificar un nuevo barrio. Distintos activistas del ecologismo y del movimiento antinuclear plantearon y lograron poner en marcha una alternativa al proyecto oficial a través de una asociación ciudadana, Forum Vauban, que ha logrado participar en el proceso de renovación del resto del barrio y dinamizar un intenso proceso de participación ciudadana orientado a convertir el futuro barrio en un asentamiento lo más ecológico posible

Psychologie politique du comportement électoral: l'élection présidentielle de 2011 en Argentine

Con el interés de analizar la intención de voto de los ciudadanos de Córdoba, Argentina, la presente investigación tuvo como objetivo principal la comparación de las variables: ideología política, autoritarismo, clima socio emocional, confianza institucional, intensidad afectiva, eficacia política, interés y conocimiento político en grupos de ciudadanos definidos según su intención de voto a los candidatos presidenciales, en las elecciones realizadas en Octubre del 2011. El estudio se realizó con una muestra cuotificada de 350 ciudadanos entre 18 y 65 años de edad. Los resultados mostraron diferencias significativas en relación con las distintas variables estudiadas, en los grupos identificados de acuerdo a su opción electoral.With the interest of analyze the voting intentions of citizens of Cordoba, Argentina, the present study aimed to compare the main variables: political ideology, authoritarianism, social-emotional climate, institutional trust, affective intensity, political efficacy, political interest and political knowledge of citizens groups defined according to their intention to vote for presidential candidates in the elections held in October 2011. This study was conducted with a sample of 350 people between 18 and 65 years old. The results showed significant differences in relation to the different variables studied in the groups identified according to their electoral choice.O presente trabalho tem por objetivo analisar a intenção de voto dos cidadãos de Córdoba, Argentina, focalizando na comparação das variáveis: ideologia política, autoritarismo, clima socioemocional, confiança institucional, intensidade afetiva, eficácia política, interesse e conhecimento político em grupos de cidadãos definidos segundo a sua intenção de voto aos candidatos presidenciais, nas eleições do Outubro de 2011. A pesquisa foi feita com uma amostra quantificada de 350 pessoas de 18 a 65 anos de idade. Os resultados mostraram diferenças significativas na relação com as distintas variáveis estudadas, nos grupos identificados de acordo com a sua opção eleitoral.Avec l'intérêt de l'analyse des intentions de vote des citoyens de Cordoba, en Argentine, la présente étude visait à comparer les principales variables : l'idéologie politique, l'autoritarisme, le climat socio-affectif, la confiance institutionnelle, l'intensité affective, l'efficacité politique, l'intérêt politique et la connaissance politique de des groupes de citoyens définis en fonction de leur intention de voter pour les candidats à l'élection présidentielle tenue en Octobre 2011. Cette étude a été menée auprès d'un échantillon de 350 personnes entre 18 et 65 ans. Les résultats ont montré des différences significatives par rapport aux différentes variables étudiées dans les groupes identifiés en fonction de leur choix électoral.Fil: Brussino, Silvina Alejandra. Universidad Nacional de Córdoba. Facultad de Psicología. Laboratorio de Psicología Cognitiva; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba; ArgentinaFil: Alonso, Daniela Rocío. Universidad Nacional de Córdoba. Facultad de Psicología. Laboratorio de Psicología Cognitiva; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba; ArgentinaFil: Dreizik, Matias Alfredo. Universidad Nacional de Córdoba. Facultad de Psicología. Laboratorio de Psicología Cognitiva; Argentin

Support Vector Regression to predict carcass weight in beef cattle in advance of the slaughter

In this paper we present a function to predict the carcass weight for beef cattle. The function uses a few zoometric measurements of the animals taken days before the slaughter. For this purpose we have used Artificial Intelligence tools based on Support Vector Machines for Regression (SVR). We report a case study done with a set of 390 measurements of 144 animals taken from 2 to 222 days in advance of the slaughter. We used animals of the breed Asturiana de los Valles, a specialized beef breed from the North of Spain. The results obtained show that it is possible to predict carcass weights 150 days before the slaughter day with an average absolute error of 4.27% of the true value. The prediction function is a polynomial of degree 3 that uses 5 lengths and the estimation of the round profile of the animal