Red Educativa Telemática

Experiencia realizada en el centro educativo Escuelas San José - Jesuitas de Valencia y que consiste en la creación de una Comunidad Virtual en el centro con la finalidad de mejorar la comunicación entre el profesorado, las familias y los alumnos; mejorar la gestión documental; y mejorar la didáctica de los procesos de enseñanza-aprendizaje. Los autores analizan las causas que originaron el proyecto; realizan una descripción de los objetivos y ámbitos en los que se desarrolla el mismo; y, por último, exponen cuáles son, a su juicio, los factores que han contribuido al éxito de su implantación, entre los que destacan la formación del profesorado como elemento clave del proyecto

Microporomechanical modeling of shale

Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, February 2010.Cataloged from PDF version of thesis.Includes bibliographical references (p. 401-429).Shale, a common type of sedimentary rock of significance to petroleum and reservoir engineering, has recently emerged as a crucial component in the design of sustainable carbon and nuclear waste storage solutions and as a prolific natural gas source. Despite its importance, the highly heterogeneous and anisotropic nature of shale has challenged the theoretical modeling and prediction of its mechanical properties. This thesis presents a comprehensive microporomechanics framework for developing predictive models for shale poroelasticity and strength. Modeling is accomplished through a multi-scale approach, in which the experimental evidence gathered from novel nanoindentation techniques and conventional macroscopic tests informs the development of a suit of micromechanics tools for linking composition and microstructure to material performance. Based on a closed loop approach of calibration and validation of elastic and strength properties at different length scales, it was possible to deconstruct shale to the scale of an elementary material unit with mechanical behaviors governed by invariant properties, and to upscale these behaviors from the nanoscale to the macroscale of engineering applications. The elementary building block for elasticity is an anisotropic solid characterizing the in situ stiffness of highly consolidated clay.(cont.) This intrinsic behavior represents the composite response of clay platelets, interlayer galleries, and interparticle contacts, yielding an invariant stiffness with respect to clay mineralogy. The anisotropic nanogranular nature of the porous clay in shale as inferred from nanoindentation is confirmed through micromechanics modeling. The intrinsic anisotropy of the clay fabric is suggested as the dominant factor driving the multi-scale anisotropic poroelasticity of unfractured shale compared to the contributions of geometrical sources related to shapes and orientations of particles. For strength properties, the micromechanics approach revealed that the frictional behavior of the elementary unit of compacted clay is scale independent, whereas a scale effect modifies its cohesive behavior. Having established a fundamental material unit and the adequate micromechanics representation for the microstructure, the macroscopic diversity of shale predominantly depends on two volumetric properties derived from mineralogy and porosity: the clay packing density and the silt inclusion volume fraction. The proposed two-parameter microporoelastic and strength models represent appealing alternatives for use in geomechanics and geophysics applications.by J. Alberto Ortega.Ph.D

Procesamiento de imagen para seguimiento de objetos basado en MicroBlaze

En este artículo se presenta la implementación en una FPGA Xilinx Spartan- 2E de un algoritmo de seguimiento de objetos, utilizando el microprocesador embebido MicroBlaze. La flexibilidad que ofrece esta alternativa ha permitido implementar el sistema empleando sólo una FPGA, memoria externa y un decodificador de vídeo, lo que permite reducir sus costes. Adicionalmente, el uso de las librerías estándar GNU permite que sea trivial prototipar los algoritmos en un PC para más tarde implementarlos en MicroBlaze.Este trabajo ha sido financiado por los proyectos 07T/0052/2003-3 de la Consejería de Educación de la Comunidad de Madrid y 161000 de la Fundación General de la U.A.M

Thermo‑magnetic signature of a superconducting multi‑band square with rough surface

In the present work, we will study the efect that the surface roughness of the sample has on the magnetic and thermodynamic properties in a mesoscopic superconducting meso-square under an external magnetic feld in a zero-feld cooling process. We will analyze the magnetization, superconducting electronic density, free Gibbs energy, specifc heat and entropy as a function of the roughness of the sample in a superconducting two-band square taking a Josephson type inter-band coupling. We show that the magnetic and thermodynamic properties depend on the roughness percentage of its surface. Our investigation was carried out by numerically solving the two-band time-dependent Ginzburg–Landau equations

Bioactive bilayered dressing for compromised epidermal tissue regeneration with sequential activity of complementary agents

The article deals with the design, preparation, and evaluation of a new bilayered dressing for application in the healing of compromised wounds. The system is based on the sequential release of two complementary bioactive components to enhance the activation of the regeneration of dermal tissue. The internal layer is a highly hydrophilic and biodegradable film of gelatin and hyaluronic acid (HG), crosslinked with the natural compound genipin, which reacts with the amine groups of gelatin. This film is loaded with the proangiogenic, anti-inflammatory, and antibacterial peptide, proadrenomedullin N-terminal 20 peptide (PAMP), that is released slowly in the wound site. The external layer, more stable and less hydrophilic, is constituted by a biodegradable polyurethane derived from poly(caprolactone) and pluronic L61. This layer is loaded with resorbable nanoparticles of bemiparin (a fractionated low molecular weight heparin), which promotes the activation of growth factors, FGF and VEGF, and provides a good biomechanical stability and controlled permeability of the bilayered dressing. Experiments carried out in mice demonstrate the excellent angiogenic effect of the HG film in the dermal tissue. Application of the bilayered dressing in the wound healing rabbit ear model shows an improved cicatrization of the wound in both ischemic and non-ischemic defects, favoring epithelialization and reducing noticeably the contraction and the inflammation.This work was supported by the CIBER-BBN and a Grant from Spain’s Ministry of Science and Education (SAF2009-13240-C02-01).Peer Reviewe

As my parents at home? Gender differences in childrens’ housework between Germany and Spain

This paper analyzes the relationship between parents’ time devoted to housework and the time devoted to housework by their children. Using data of Germany and Spain from the Multinational Time Use Study, we find positive correlations, but gender differences, between parents and children’s housework time, which indicates that the more time parents devote to housework the more time their children devote to housework. While in Germany both fathers and mothers’ housework is positively related with the time devoted to housework by the children, in Spain it is only father’s time in housework that is positively related to children’s housework time. Thus, we find a different relationship between parents and children’s housework time in Mediterranean countries compared to other European countries. We also obtain that these results are not applicable to all sub-groups of population, as our analysis considering the labor force status and education of the parents yield mixed results

Análisis de las estadísticas discriminantes en jugadores de baloncesto según su puesto específico, en las finales de las competiciones europeas (1988-2006). Diferencias entre jugadores titulares y suplentes

El objetivo del presente estudio ha sido identificar las diferencias que se observan en jugadores de baloncesto, en situación de juego, en función del puesto específico (bases, aleros y pivots), diferenciando entre jugadores titulares y suplentes. Los datos utilizados para el análisis fueron las variables estadísticas individuales de todas las finales de las tres competiciones europeas de clubes  celebradas entre las temporadas 1987-88 y 2005-06. El análisis de los resultados se realizó a través de un análisis discriminante, obteniendo una función discriminante y unos coeficientes canónicos (CCE). Los jugadores titulares se diferenciaron por posición en los rebotes ofensivos (CCE = –0,57), tapones (CCE = –0,52), lanzamientos de 3 puntos convertidos (CCE = 0,51) y fallados (CCE = 0,37). Estos resultados señalan a los bases titulares como los jugadores titulares más importantes dentro de la  estructura colectiva de un equipo. En el caso de los jugadores suplentes, las variables discriminantes encontradas fueron los tapones (CCE = 0,36), los rebotes defensivos (CCE = 0,31) y los lanzamientos de 2 puntos convertidos (CCE = 0,31). Dichos resultados permiten identificar a los pivots suplentes como los suplentes más importantes en la estructura colectiva del equipo. Los resultados presentados pueden ser utilizados como datos a tener en cuenta en el proceso de selección de jugadores en la formación de los equipos o bien en la dirección de los jugadores durante los entrenamientos y la competición

Anàlisi de les estadístiques discriminants en jugadors de bàsquet segons el seu lloc específic, a les finals de les competicions europees (1988-2006). Diferències entre jugadors titulars i suplents

L’objectiu del nostre estudi ha estat identificar les diferències que s’observen en jugadors de bàsquet, en situació de joc, en funció del lloc específic (bases, alers i pivots), tot diferenciant entre jugadors titulars i suplents. Les dades utilitzades per a l’anàlisi van ser les variables estadístiques individuals de totes les finals de les tres competicions europees de clubs celebrades entre les temporades 1987-88 i 2005-06. L’anàlisi dels resultats es va realitzar a través d’una anàlisi discriminant, que va obtenir una funció discriminant i uns coeficients canònics (CCE). Els jugadors titulars es van diferenciar per posició en els rebots ofensius (CCE = –0,57), taps (CCE = –0,52), llançaments de 3 punts convertits (CCE = 0,51) i fallats (CCE = 0,37). Aquests resultats assenyalen els bases titulars com els jugadors titulars més importants dins l’estructura col·lectiva d’un equip. En el cas dels jugadors suplents, les variables discriminants trobades van ser els taps (CCE = 0,36), els rebots defensius (CCE = 0,31) i els llançaments de 2 punts convertits (CCE = 0,31). Aquests resultats permeten identificar els pivots suplents com els suplents més importants en l’estructura col·lectiva de l’equip. Els resultats presentats poden ser utilitzats com a dades a tenir en compte en el procés de selecció de jugadors en la formació dels equips o bé en la direcció dels jugadors durant els entrenaments i la competició

Basketball game-related statistics that discriminate between teams season-long success

The aim of the present study was to identify the game-related statistics that discriminate between season-long successful and unsuccessful basketball teams participating in the Spanish Basketball League (LEB1). The sample included all 145 average records per season from the 870 games played between the 2000-2001 and the 2005-2006 regular seasons. The following game-related statistics were gathered from the official box scores of the Spanish Basketball Federation: 2- and 3-point field-goal attempts (both successful and unsuccessful), free-throws (both successful and unsuccessful), defensive and offensive rebounds, assists, steals, turnovers, blocks (both made and received), and fouls (both committed and received). To control for season variability, all results were normalized to minutes played each season and then converted to z-scores. The results allowed discrimination between best and worst teams' performances through the following game-related statistics: assists (SC=0.47), steals (SC=0.34), and blocks (SC=0.30). The function obtained correctly classified 82.4% of the cases. In conclusion, season-long performance may be supported by players' and teams' passing skills and defensive preparation