Dwork families and D\mathcal{D}-modules

A Dwork family is a one-parameter monomial deformation of a Fermat hypersurface. In this paper we compute algebraically the invariant part of its Gauss-Manin cohomology under the action of certain subgroup of automorphisms. To achieve that goal we use the algebraic theory of $\mathcal{D}$-modules, especially one-dimensional hypergeometric ones.Comment: 24 pages, final versio

Irregular Hodge filtration of some confluent hypergeometric systems

We determine the irregular Hodge filtration, as introduced by Sabbah, for the purely irregular hypergeometric $\mathcal{D}$-modules. We obtain in particular a formula for the irregular Hodge numbers of these systems. We use the reduction of hypergeometric systems from GKZ-systems as well as comparison results to Gauss-Manin systems of Laurent polynomials via Fourier-Laplace and Radon transformations.Comment: 32 pages, final versio

An empirical approach to the extragalactic background light from AEGIS galaxy SED-type fractions

The extragalactic background light (EBL) is of fundamental importance both for understanding the entire process of galaxy evolution and for gamma-ray astronomy. However, the overall spectrum of the EBL between 0.1 and 1000 microns has never been determined directly neither from observed luminosity functions (LFs), over a wide redshift range, nor from any multiwavelength observation of galaxy spectral energy distributions (SEDs). The evolving, overall spectrum of the EBL is derived here utilizing a novel method based on observations only. It is emphasized that the local EBL seems already well constrained from the UV up to the mid-IR. Since different independent methodologies such as direct measurement, galaxy counts, gamma-ray attenuation and realistic EBL modelings point towards the same EBL intensity level. A relevant contribution from Pop III stars to the local EBL seems unlikely.Comment: Contributed talk at the IAU 284 SED2011 Symposium, Preston, UK, September 5-9, 2011; 4 pages, 1 figure. Online material available at http://side.iaa.es/EB

The contrastive value of lexical stress in visual word recognition: Evidence from spanish

Resumen tomado de la publicaciónEl valor contrastivo del acento léxico en el reconocimiento visual de palabras: evidencia del español. Antecedentes: muchos pares de palabras en español, en particular muchas formas verbales, difieren solo en la sílaba acentuada, tal como aNImo y aniMÓ. Así el acento puede adquirir un valor contrastivo que fue confirmado por Dupoux, Pallier, Sebastian y Mehler (1997) en español, pero no en francés, en percepción auditiva. Método: este estudio contrasta el efecto de primado en pares de palabras que difieren en su patrón de acentuación con el efecto de repetición, el primado solo de acento (sin relación ortográfica) y el primado morfológico en reconocimiento visual de palabras. Resultados: usando priming enmascarado se obtuvo facilitación para los pares con diferente acento (rasGÓ/RASgo) comparando con los pares sin relación (dorMÍ/RASgo), pero no se produjo comparando con los no relacionados de igual acento (PERsa/RASgo). Sin embargo, los pares idénticos (RASgo-RASgo) produjeron facilitación comparando con ambas condiciones ortográficamente relacionadas. Con un SOA largo los pares con diferente acento (ortográficamente iguales) produjeron una facilitación significativa, como ocurrió con los pares relacionados morfológicos (RASga/RASgo), sobre los pares ortográficamente diferentes (PERsa/RASgo). Conclusión: estos resultados confirman la importancia del procesamiento temprano y preléxico del acento para la selección léxica en español, como ocurre con las características ortográficas y fonológicas de las palabras.Universidad de Oviedo. Biblioteca de Psicología; Plaza Feijoo, s/n.; 33003 Oviedo; Tel. +34985104146; Fax +34985104126; [email protected]

Piecewise smooth stationary Euler flows with compact support via overdetermined boundary problems

We construct new stationary weak solutions of the 3D Euler equation with compact support. The solutions, which are piecewise smooth and discontinuous across a surface, are axisymmetric with swirl. The range of solutions we find is different from, and larger than, the family of smooth stationary solutions recently obtained by Gavrilov and Constantin-La-Vicol; in particular, these solutions are not localizable. A key step in the proof is the construction of solutions to an overdetermined elliptic boundary value problem where one prescribes both Dirichlet and (nonconstant) Neumann data

Recycling of construction and demolition waste generated by building infrastructure for the production of glassy materials

The use of waste materials generated by construction and demolition industry to yield valuable glassy materials, i.e. enamel for glazed ceramic tiles and cellular glasses is presented in this study. Both types of materials are produced by one-step treatment at moderate temperatures after simple waste chemical composition adjust. The enamels are manufactured directly from the initial waste powder by melting, while the expanded materials result from mixing of the vitreous material obtained after waste vitrification with an adequate foaming agent and posterior thermal treatment. Through the manuscript the feasibility of one step production of second generation profit materials is discussed in order to help achieving sustainable development and environmental protectio

Dwork families and D-modules

A Dwork family is a one-parameter monomial deformation of a Fermat hypersurface. In this paper we compute algebraically the invariant part of its Gauss–Manin cohomology under the action of certain subgroup of automorphisms. To achieve that goal we use the algebraic theory of D-modules, especially one-dimensional hypergeometric ones.Junta de Andalucía P12-FQM-2696Ministerio de Economía y Competitividad MTM2013-46231-PAgence Nationale de la Recherche 13-IS01- 0001-01/02Deutsche Forschungsgemeinschaft HE 2287/4-1, SE 1114/5-