El amortiguamiento frontal de la estructura de la cobertera surpirenaica y su relación con el anticlinal de Barbastro-Balaguer

La estructura de la parte frontal del sector central del Pirineo Meridional esta constituida por una sucesión de escamas imbricadas generalmente con escasa deformación interna por plegamiento. En el conjunto de estas escamas se distinguen tres sectores (Montsec, Sierras Marginales y franja de Terciario continental despegado) limitadas por los accidentes principales que denominamos cabalgamrento del Montsec, cabalgamrento inferror de las Sierras Marginales y cabalgamiento de San Esteban de Lrtera. Este Último emerge en el anticlinal de Barbastro-Balaguer y tiene como nivel de despegue la base de los yesos del Eoceno en vez del Keuper, tan  generalizado en el dominio surpirenaico.Un corte compensado refleja un acortamiento de unos 11 km entre ei frente del Montsec y el cabalgamiento inferior de las Sierras Marginales. Una tentativa de prolongación de este corte hasta el an-tepais indeformado sugiere un acortamiento de mas del 60 por cientoto, implicando un desplazamiento del Montsec de 56 km

Failure damage mechanical properties of thoracic and abdominal porcine aorta layers and related constitutive modeling: phenomenological and microstructural approach

Despite increasing experimental and analytical efforts to investigate the irreversible effects of arterial tissue failure, the underlying mechanisms are still poorly understood. The goal of this study was to characterize the failure properties of the intact wall and each separated layer (intima, media, and adventitia) of the descending thoracic and infrarenal abdominal aorta and to test the hypothesis that the failure properties of layer-separated tissue depend on the location of the aorta. To test this hypothesis, we performed uniaxial tests to study the mechanical behavior of both intact and layer-separated porcine aortic tissue samples taken from descending thoracic and infrarenal abdominal aorta until complete failure. The fracture stress is higher in the infrarenal abdominal aorta than in the equivalent descending thoracic aorta. It was also found that the extrapolation of the elastic mechanical properties from the physiological to the supra-physiological regime for characterizing the mechanical response of the aorta would be inappropriate. Finally, we report values of constitutive parameters using phenomenological and microstructural damage models based on continuum damage mechanics theory. The phenomenological damage model gives an excellent fit to the experimental data compared to the microstructural damage model. Although the fitting results of the phenomenological model are better, the microstructural models can include physically motivated aspects obtained from experiments

Quantum reservoir computing in finite dimensions

Most existing results in the analysis of quantum reservoir computing (QRC) systems with classical inputs have been obtained using the density matrix formalism. This paper shows that alternative representations can provide better insights when dealing with design and assessment questions. More explicitly, system isomorphisms are established that unify the density matrix approach to QRC with the representation in the space of observables using Bloch vectors associated with Gell-Mann bases. It is shown that these vector representations yield state-affine systems (SAS) previously introduced in the classical reservoir computing literature and for which numerous theoretical results have been established. This connection is used to show that various statements in relation to the fading memory (FMP) and the echo state (ESP) properties are independent of the representation, and also to shed some light on fundamental questions in QRC theory in finite dimensions. In particular, a necessary and sufficient condition for the ESP and FMP to hold is formulated using standard hypotheses, and contractive quantum channels that have exclusively trivial semi-infinite solutions are characterized in terms of the existence of input-independent fixed points.Comment: 19 pages, 4 figure

Over length quantification of the multiaxial mechanical properties of the ascending, descending and abdominal aorta using Digital Image Correlation

In this paper, we hypothesize that the biaxial mechanical properties of the aorta may be dependent on arterial location. To demonstrate any possible position-related difference, our study analyzed and compared the biaxial mechanical properties of the ascending thoracic aorta, descending thoracic aorta and infrarenal abdominal aorta stemming from the same porcine subjects, and reported values of constitutive parameters for well-known strain energy functions, showing how these mechanical properties are affected by location along the aorta. When comparing ascending thoracic aorta, descending thoracic aorta and infrarenal abdominal aorta, abdominal tissues were found to be stiffer and highly anisotropic. We found that the aorta changed from a more isotropic to a more anisotropic tissue and became progressively less compliant and stiffer with the distance to the heart. We observed substantial differences in the anisotropy parameter between aortic samples where abdominal samples were more anisotropic and nonlinear than the thoracic samples. The phenomenological model was not able to capture the passive biaxial properties of each specific porcine aorta over a wide range of biaxial deformations, showing the best prediction root mean square error e=0.2621 for ascending thoracic samples and, especially, the worst for the infrarenal abdominal samples e=0.3780. The micro-structured model with Bingham orientation density function was able to better predict biaxial deformations (e=0.1372 for ascending thoracic aorta samples). The root mean square error of the micro-structural model and the micro-structured model with von Mises orientation density function were similar for all positions

Síntesis y caracterización de materiales con estructura tipo perovskita para pilas de combustible de óxido sólido de temperatura intermedia=

Desarrollo de una pila de combustible de óxidos sólidos para aplicaciones de temperatura intermedia basada en materiales con estructura tipo perovskit

Accurate bidiagonal decomposition of totally positive Cauchy-Vandermonde matrices and applications

Cauchy–Vandermonde matrices play a fundamental role in rational interpolation theory and in other fields. When all their corresponding nodes are different and positive and all poles are different and negative and follow adequate orderings, these matrices are totally positive. In this paper we provide fast algorithms for computing bidiagonal factorizations of these matrices and their inverses with high relative accuracy. These algorithms can be used to solve with high relative accuracy other algebraic problems, such as the computation of all singular values, all eigenvalues or the solution of certain linear systems. The error analysis of the algorithm for computing the bidiagonal factorization and the corresponding perturbation theory are also performed

Laboratorio de Ciencias en Campus Virtual: elaboración de recursos didácticos on-line para apoyo, complemento y extensión del trabajo experimental de laboratorio en el Grado de Maestro en Educación Primaria

El objetivo del presente proyecto era elaborar herramientas y recursos didácticos utilizando la plataforma Moodle (implementada en el Campus Virtual) que pudieran ser empleados en las sesiones de prácticas de laboratorio aprovechando la infraestructura en conexión vía WIFI, para que los alumnos que desarrollan grupalmente su trabajo experimental puedan además utilizar un portátil o tableta digital para acceder a los contenidos y actividades adicionales propuestas para cada práctica a través del Campus Virtual. Los recursos que se generarían estarían categorizados en disciplinas científicas: Física, Química, Geología y Biología. Los materiales estarían compuestos por guías didácticas on-line de cada una de las prácticas con distinto nivel de dificultad y diferenciando entre cuestiones, ejercicios y actividades para realizar durante las sesiones de laboratorio. También se proponían otras actividades complementarias y de extensión para su realización de forma autónoma fuera del horario escolar. Esto permitiría que el alumnado pueda conectar las cuestiones trabajadas en el laboratorio con la vida real, promoviendo un aprendizaje más significativo. También se diseñarían y elaborarían actividades concretas en las diferentes disciplinas para trabajarlas principalmente desde Campus Virtual, como disecciones virtuales de animales, simulaciones interactivas sobre las propiedades coligativas de las disoluciones, laboratorios virtuales, etc. Esto permitiría que los alumnos pudieran “llevarse el laboratorio a casa” donde podrían trabajar cuestiones prácticas y, lo más importante, adaptándose a su propio ritmo de aprendizaje. Por tanto, estamos ante una dinámica basada en los principios constructivistas del sistema ECTS, donde se recomienda centrarse más en la tarea del alumno y no en la del profesor. La parte final de la herramienta ofrecería la oportunidad al alumnado de efectuar una autoevaluación de los conocimientos adquiridos durante las prácticas. De cara al profesor de la correspondiente asignatura, la herramienta didáctica proporcionaría además una información útil sobre la evolución colectiva y/o individual de los alumnos en base a las prácticas desarrolladas y su autoevaluación

Generalized MGF of Beckmann Fading with Applications to Wireless Communications Performance Analysis

The Beckmann distribution is a general multipath fading model for the received radio signal in the presence of a large number of scatterers, which can thence be modeled as a complex Gaussian random variable where both the in-phase and quadrature components have arbitrary mean and variance. However, the complicated nature of this distribution has prevented its widespread use and relatively few analytical results have been reported for this otherwise useful fading model. In this paper, we derive a closed-form expression for the generalized moment-generating function (MGF) of the signal-to-noise ratio (SNR) of Beckmann fading, which permits to circumvent the inherent analytical complexity of this model. This is a new and useful result, as it is key for evaluating several important performance metrics of different wireless communication systems and also permits to readily compute the moments of the output SNR. Thus, we obtain simple exact expressions for the energy detection performance in Beckmann fading channels, both in terms of the receiver operating characteristic (ROC) curve and of the area under ROC curve. We also analyze the outage probability in interference limited systems affected by Beckmann fading, as well as the outage probability of secrecy capacity in wiretap Beckmann fading channels. Monte Carlo simulations have been performed to validate the derived expressions.Universidad de Málaga. Campus de Excelencia Internacional. Andalucía Tech

Los Planes de medioambiente de la universidades catalanas

Un dels reptes amb el que ens les haurem de veure serà què en farem dels residus que generen els productes que incorporen components elèctrics o electrònics. Existeix una gran quantitat d’artefactes del nostre entorn quotidià que utilitzen aquests components. Per una altra banda, al món el 20% de la població utilitza més del 80% dels recursos naturals del planeta i, associat al benestar i la qualitat de vida, hi ha inconvenients com la generació desmesurada de residus

Estaciones satelitales meteorológicas NOAA: Estado del arte, perspectiva y proyección futura

This document presents a documentary review of the impact done by ground satellite stations linked to NOAA's meteorological satellites, highlighting the implementation of software defined radio and some possible applications that could be given to satellite stations in terms of data and information processing. This work is done in order to find the main characteristics of these satellite communications systems and several applications, which are oriented towards the monitoring of natural phenomena for documentation and prevention; presenting the projection with the implementation is in Cloud and research through years.En este documento se realiza una revisión documental del impacto de la implementación de estaciones satelitales terrestres enlazadas a los satélites meteorológicos de la entidad NOAA resaltando la implementación de radio definido por software  y las posibles aplicaciones que se le podrían das a las estaciones satélites en cuanto al procesamiento de datos e información; este trabajo es realizado con el fin de hallar las principales características del estos sistemas de comunicaciones satelitales y las diferentes aplicaciones, las cuales esta orientadas hacia el control y monitoreo de fenómenos naturales para documentación y prevención de estos; presentando la proyección con la implementación en Cloud y las investigaciones en los años