Las encuadernaciones de la Biblia Políglota Complutense

La investigación pretende analizar y describir un conjunto de encuadernaciones de biblias políglotas realizadas en diferentes épocas, desde principios del siglo XVI hasta finales del siglo XVIII o principios del XIX, y que forman parte de las colecciones de tres instituciones donde se ha realizado su estudio, digitalización y catalogación, como son: la Real Academia de la Historia, con seis tomos de la Políglota de estilo plateresco; la Catedral de Toledo, con una Biblia con ruedas decorativas, posiblemente, del taller de Antonio Suárez; y la Universidad Complutense de Madrid, con tres biblias completas y dos tomos encuadernados en el siglo XVIII. El estudio recoge un grupo variopinto de biblias políglotas con revestimientos originales y reencuadernadas con diferentes materiales, que en su conjunto, presentan diferentes estructuras decorativas. Finalmente se han investigado las marcas de propiedad y antiguos tejuelos, así como los diferentes elementos decorativos, que nos han servido para ubicar talleres y zonas geográficas donde se realizaron las encuadernaciones. [ABSTRACT] The investigation tries to analyze and to describe a set of bindings of the bibles polyglots realized in different epochs, from beginning of the 16th century until ends of the century 18th-beginning of the 19th, and these form a part of the collections of three institutions where his study, cataloguing and digitalization was done, they are: the Royal Academy of the History, with six volumes of the Polyglot of style plateresque; the Cathedral of Toledo, with a Bible with decorative wheels, possibly, of Antonio Suárez's workshop; and the Complutensian University of Madrid, with three complete bibles and two volumes bound in the 18th century. The study gathers a diverse group of bibles polyglots with coatings original and re-bound with different materials, that in his set, they present different decorative structures. Finally there have been investigated the brands of property and former labels, as well as the different decorative elements, which have served us to locate workshops and geographical zones where the bindings were realized

Teucrium aureum subsp. turdetanum Devesa & Valdés-Bermejo, subsp. nov.

In this paper a new taxon of the genus Teucrium from SW Spain is described, T. aureum subsp. turdetanum Devesa & Valdes-Bermejo.Se describe para el SW de España un nuevo taxon del género Teucrium, T. aureum subsp. turdetanum Devesa & Valdes-Bermejo

Las encuadernaciones artísticas de pergamino de la colección Francisco Guerra

Se estudian las encuadernaciones de pergamino con elementos artísticos pertenecientes a la colección Francisco Guerra, analizándose las estructuras constructivas, los materiales empleados, las estructuras decorativas de los planos y los lomos, las guardas pintadas, los emblemas heráldicos de varias encuadernaciones estudiándose sus procedencias, identificando, en algunos casos, sus encuadernadores como los trabajos de Brugalla, Vera, Menard, Arias y Ginesta, y realizando finalmente un inventario de florones, ruedas y planchas empleadas en cada encuadernación. [ABSTRACT]This article studies the parchment bindings with artistic elements that belonged to Francisco Guerra’s collection. The constructive structures, materials used, decorative structures of the sides and the spines, the painted endpaper and the heraldic emblems of several bindings studying their origins it’s also analyzed, identifiying, in some cases, the bookbinder as happens with the works of Brugalla, Vera, Menard and Arias y Ginesta. We finally do an inventory of tailpieces, gilding rolls and plates used in each binding

Phase Shifter for Millimeter-Wave Frequency Range Based on Glide Symmetric Structures

The use of glide symmetry in radiofrequency devices to introduce dispersive effects has been recently proposed and demonstrated. One of these effects is to control the propagation constant of the structure. Here, we propose a mm-wave phase shifter whose elements have a glide-symmetric configuration to achieve a greater phase shift in the same waveguide space than the non-glide-symmetric case. The glide-symmetric phase shifter is implemented in waveguide technology and is formed by rows of metallic pins that produce the desired phase shift. To assess the better performance of the glide-symmetric phase shifter, it is compared to its non-glide-symmetric version whose metallic pins are located only in one of the broad sides of the waveguide. The operating frequency range of the phase shifter is 67 to 75 GHz. Results show a 180 degree phase shift in regard to the reference waveguide without pins, and 50 degrees more than the non-glide-symmetric version.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Experiencias en la enseñanza de la matemática universitaria en ambientes de programación sobre asistentes matemáticos

El trabajo muestra las experiencias en la enseñanza de las matemáticas en carreras de perfil informático y matemático apoyado en un ambiente de programación sobre asistentes matemáticos durante dos años en las carreras de ingeniería informática en la universidad de Pinar del Río en Cuba y en las carreras de licenciatura en computación en la universidad estadual de Mato Groso Brasil. La metodología aplicada consistió en la construcción de conceptos y modelos matemáticos fundamentales pasando por las etapas gráfica, numérica y analítica apoyados en niveles de programación, el trabajo se desarrollo en equipos. Se pueden utilizar en esta metodología diferentes asistentes matemáticos siempre que permitan la programación

Emulation of MIMO nonisotropic fading environments with reverberation chambers

Some recent publications have extended the emulating capabilities of reverberation chambers. While polarization imbalance has been removed and Ricean-fading environments are now properly emulated, these chambers are still limited to isotropic nonline of sight (NLOS) scattering. By controlling the power received, number of resolvable multipath components (MPC), angular spread (AS), and angle of arrival (AoA), the emulation of real-propagating environments with both isotropic and nonisotropic scattering are demonstrated in this letter using a reverberation chamber with several multiple-input–multiple-output (MIMO) arrays.This work was supported in part by the Fundación Séneca, the R&D unit of the Autonomous Region of Murcia (Spain) under project references TIC-TEC 07/02-0005 and by the Spanish National R&D Programme through TEC2007/63470/TCM

Effect of user presence on receive diversity and MIMO capacity for rayleigh-fading channels

The effects of the presence of the user on multipleinput– multiple-output (MIMO) performance for wireless communications systems is investigated through measurements in a reverberation chamber. Measured results have demonstrated that despite a decrement on the envelope correlation coefficient, a degradation of both diversity gain and MIMO capacity are expected when the user is present. While the validity of the correlation coefficients for predicting MIMO performance is limited in the presence of the user, the effects have also been found to be strongly dependent upon frequency, antenna topology, and user characteristics.This work was supported in part by the Fundación Séneca, the R&D coordinating unit of the Autonomous Region of Murcia (Spain) under Projects 2I05SU0033 and TIC-TEC 06/01-0003

Accurate Estimation of Correlation and Capacity for Hybrid Spatial-Angular MIMO Systems

In this paper, several novel functions for accurately estimating the correlation and the multiple-input–multiple-output (MIMO) capacity of combined spatial and true polarization diversity (TPD) schemes are proposed for the first time. Minimum error estimation of the correlation for a hybrid spatial–TPD linear scheme previously reported cannot be obtained by simple nonlinear least-square estimators, and the use of genetic algorithms (GAs) provides an accurate solution. Channel matrix coefficients and MIMO capacities are analyzed for the diverse optimization strategies employed, which aim to identify the best prediction of MIMO performance. The novel functions are used with previously reported results and validated for Rayleigh fading scenarios with isotropic scattering using a multimode-stirred chamber (MIMO Analyzer). An accurate prediction of high correlation values is concluded to be of extreme importance for the final MIMO performance estimation. This has been found to be particularly important for estimating MIMO capacity with achieved prediction accuracies of 1.1% at SNR = 15 dB. In contrast, the accurate prediction of low correlation values has been found to have a less-important effect on the final capacity-predicting performance.This work was supported in part by the Spanish National R&D Program under Grant TEC2008-05811