Analytic Coulomb matrix elements in a three-dimensional geometry

Using a complete basis set we have obtained an analytic expression for the matrix elements of the Coulomb interaction. These matrix elements are written in a closed form. We have used the basis set of the three-dimensional isotropic quantum armonic oscillator in order to develop our calculations, which can be useful when treating interactions in localized systems.Comment: 3 pages, errat

Acoustical Behavior Of Churches: Mudejar-Gothic Churches

Christian churches have traditionally been considered to have very good acoustical behavior. This unfounded belief has led to important en-on in church rehabilitation works, especially when the church is to be used subsequently as an auditorium or theater; this is the case of many churches in Spain. Our research group has worked in acoustical analysis for more than ten years. We have participated in many cases of church rehabilitation and have had the opp&unity to achieve surprisingly good acwstical behavior in several. We deal with a very common type in southern Spain: Gothic-Mudejar churches, which have a small volume, a triple-nave layout, and wooden ceilings

«El Sol es comido»: representaciones, prácticas y simbolismos del eclipse solar entre los antiguos nahuas y otros grupos mesoamericanos

This article is aimed at explaining the conceptions of the eclipse of the sun among prehispanic Nahuas, through the colonial written and pictorial sources. Although the starting point are ancient Nahuas and the main corpus comes from them, there is a strong support in ancient as well as present day Mayan data. Such support is also found in ethnographies of various contemporary Indian groups, and my own field work among Nahuas of Pahuatlan, in Sierra Norte de Puebla. Thus, it is offered a big picture of this phenomenon. The article explains the way in which an eclipse of the sun was represented, the various agents involved in it, the ritual practices implemented by Nahuas and other ethnic groups to reduce the attack suffered by this luminary, as well as the damaging effects produced by the eclipse. At the end, a hypothesis is advanced of the symbolical nature of an eclipse, based mainly on ethnographic data.El artículo tiene como objetivo explicar las concepciones del eclipse solar entre los nahuas prehispánicos, a través de las fuentes escritas y pictóricas coloniales. Si bien el punto de partida son los antiguos nahuas y el mayor corpus de información proviene de ellos, existe un fuerte apoyo en la información maya, tanto antigua como presente, así como en las etnografías de diversos grupos indígenas contemporáneos, y el propio trabajo de campo del autor entre los nahuas de Pahuatlán, en la Sierra Norte de Puebla. De esta manera, se ofrece una visión amplia del fenómeno. Los aspectos que se abordan en el trabajo son las representaciones del eclipse de Sol, los agentes que intervinieron en él, las prácticas rituales implementadas por los nahuas y otros grupos para aminorar el ataque que sufría el astro, así como los efectos nocivos que producía el eclipse. Por último, se propone una hipótesis del eclipse solar de carácter simbólico, basada principalmente en datos etnográficos

The "Discreet Monster" of Bengal to the service of the policy of Philip III agaisnt the moriscos

En el presente artículo se lleva a cabo el análisis y la edición parcial de un pliego impreso en Granada en 1612 que conjuga tres textos de procedencia y contenido muy diverso: la historia de un monstruo de Bengala, un romance de Lope de Vega acerca de la vida de Cristo y otro sobre un sacerdote aclamado como santo. La unidad formal de las composiciones (el romance) y la sintonía ideológica de este tríptico permiten proponer una lectura de conjunto a partir del contexto histórico social en el que se difunde el pliego: la política de Felipe III contra los moriscosThe analysis and partial edition of a pamphlet printed in Granada in 1612 is carried out in the present article. This pamphlet includes three texts of very diverse content and origin: the history of a monster of Bengal, a romance of Lope de Vega about the life of Christ and other poem about a priest acclaimed as a saint. The similar metric of the compositions (the romance) and the ideological harmony of this triptych allow us to propose a global reading from the historical social context in which the pamphlet is spread: Philip III's policy against the morisco

Antonio Sánchez Jiménez, Adrián J. Sáenz, "Saavedra Fajardo y la Confederación Helvética: contexto y textos de una relación", 2014 [Reseña]

Obra reseñada: Antonio Sánchez Jiménez, Adrián J. Sáez, "Saavedra Fajardo y la Confederación Helvética: contexto y textos de una relación", Kassel: Edition Reichenberger, 2014, 192 pp. ISBN: 978-3-944244-18-1