675 research outputs found

    A Practical Example for Model-Driven Web Requirements

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    The number of approaches for Web environments has grown very fast in the last years: HDM, OOHDM, and WSDM were among the first, and now a large number can be found in the literature. With the definition of MDA (Model- Driven Architecture) and the acceptance of MDE (Model-Driven Engineering) techniques in this environment, some groups are working in the use of metamodels and transformations to make their approaches more powerful. UWE (UMLBased Web Engineering) or OOWS (Object-Oriented Web Solutions) are only some examples. However, there are few real experiences with Web Engineering in the enterprise environment, and very few real applications of metamodels and MDE techniques. In this chapter the practical experience of a Web Engineering approach, NDT, in a big project developed in Andalusia is presented. Besides, it shows the usability of metamodels in real environments

    A Practical Environment to Apply Model-Driven Web Engineering

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    The application of a model-driven paradigm in the development of Web Systems has yielded very good research results. Several research groups are defining metamodels, transformations, and tools which offer a suitable environment, known as model-driven Web engineering (MDWE). However, there are very few practical experiences in real Web system developments using real development teams. This chapter presents a practical environment of MDWE based on the use of NDT (navigational development techniques) and Java Web systems, and it provides a practical evaluation of its application within a real project: specialized Diraya.Ministerio de Educación y Ciencia TIN2007-67843-C06-03Ministerio de Educación y Ciencia TIN2007-30391-

    Estudio de la trabeculación ósea en la artrodesis subastragalina

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    En este artículo presentamos nuestra casuística en artrodesis artroscópica subastragalina revisando los principios biomecánicos que rigen esta articulación y presentando ésta como una técnica válida para el tratamiento de distintas patologías en el retropié que interesan esta articulación.We present our casuistic on arthroscopic subtalar arthrodesis reviewing the biomechanics of this joint and presenting it as a valid technique for the treatment of some pathologies in the rearfoot that affect this joint.Premio al mejor trabajo en el XXXII Congreso de la Sociedad Ibérica de Biomecánica y BiomaterialesPeer ReviewedAward-winnin

    Metavolcanic rocks from schistose domain of Galicia-Tras-os-Montes: petrography, geochemistry and tectonic environment (Galice, NW. Spain)

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    [Resumen] Se estudia el vulcanismo intercalado en los grupos litoestratigráficos inferiores que integran el Dominio Esquistoso de Galicia Tras-os-Montes (DEGTM) denominados de muro a techo Santabaía, Nogueira y Paraño. El grupo de LalínForcarei que completa la secuencia no será tratado en este trabajo. La edad de estos grupos debe comprender desde el Precámbrico hasta el Devónico Inf. Los tres grupos tiene un cierto carácter vulcanosedimentario, más marcado en el grupo de Santabaía que en los dos grupos superiores. Se encuentran en ellos diferentes niveles volcánicos y vulcanosedimentarios de espesor y continuidad lateral variables, correspondientes a neises microporfídicos de dos micas y ortoneises biotíticos, además de algún nivel de riolitas y tranquitas presentes hacia la parte alta del grupo de Paraño. Geoquímicamente se caracteriza por ser un vulcanismo ácido de naturaleza calcoalcalina en el que predominan los términos riolíticos y iodacíticos de alto contenido en K, posiblemente originado en la zona externa de un margen continental pasivo existente durante el Ordovícico-Silúrico en el NO. de la Península, en el que tendrían lugar diferentes episodios o etapas de aportes volcánicos alternando con etapas más largas de sedimentación detrítica.[Abstract] The Vulcanism interbedded in the lower litostratigraphic groups of the DEGTM is studied. Those gruoups are known as Santabaia, Nogueira and Paraño from bo~tom to top; The sequence is completed with the Lalín-Forcarei group that is not studied in this paper. The age of the whole sequence is probably, from Precambrian to lower Devonian. The three groups show volcano-sedimentary features which are dominant in the Santabaia group. Several volcanic and volcano-sedimentary levels with different thickness and extension are found; these correspond to two mica microporfidic gneisses and biotitic ortogneisses and seldom ryolites and trachites in the uppermost pan of the Paraño group. Geochemically correspond to acid calcoalcaline vulcanites with ryolites and K rich ryodacites as main types. These rocks are possibily related to an external area of a continental margin which existed during Ordovician-Silurian time in the NW of the Iberian Peninsula. Several volcanic stages would alternate with sedimentation in this geotectonic environment

    Crtc1 activates a transcriptional program deregulated at early Alzheimer's disease-related stages

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    Cognitive decline is associated with gene expression changes in the brain, but the transcriptional mechanisms underlying memory impairments in cognitive disorders, such as Alzheimer's disease (AD), are largely unknown. Here, we aimed to elucidate relevant mechanisms responsible for transcriptional changes underlying early memory loss in AD by examining pathological, behavioral, and transcriptomic changes in control and mutant β-amyloid precursor protein (APPSw,Ind) transgenic mice during aging. Genome-wide transcriptome analysis using mouse microarrays revealed deregulation of a gene network related with neurotransmission, synaptic plasticity, and learning/memory in the hippocampus of APPSw,Ind mice after spatial memory training. Specifically, APPSw,Ind mice show changes on a cAMP-responsive element binding protein (CREB)-regulated transcriptional program dependent on the CREB-regulated transcription coactivator-1 (Crtc1). Interestingly, synaptic activity and spatial memory induces Crtc1 dephosphorylation (Ser151), nuclear translocation, and Crtc1-dependent transcription in the hippocampus, and these events are impaired in APPSw,Ind mice at early pathological and cognitive decline stages. CRTC1-dependent genes and CRTC1 levels are reduced in human hippocampus at intermediate Braak III/IV pathological stages. Importantly, adeno-associated viral-mediated Crtc1 overexpression in the hippocampus efficiently reverses Aβ-induced spatial learning and memory deficits by restoring a specific subset of Crtc1 target genes. Our results reveal a critical role of Crtc1-dependent transcription on spatial memory formation and provide the first evidence that targeting brain transcriptome reverses memory loss in AD

    Crtc1 activates a transcriptional program deregulated at early Alzheimer's disease-related stages

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    Cognitive decline is associated with gene expression changes in the brain, but the transcriptional mechanisms underlying memory impairments in cognitive disorders, such as Alzheimer's disease (AD), are largely unknown. Here, we aimed to elucidate relevant mechanisms responsible for transcriptional changes underlying early memory loss in AD by examining pathological, behavioral, and transcriptomic changes in control and mutant β-amyloid precursor protein(APPSw,Ind) transgenic mice during aging. Genome-wide transcriptome analysis using mouse microarrays revealed deregulation of a gene network related with neurotransmission, synaptic plasticity, and learning/memory in the hippocampus of APPSw,Ind mice after spatial memory training. Specifically, APPSw,Ind mice show changes on a cAMP-responsive element binding protein(CREB)- regulated transcriptional program dependent on the CREB-regulated transcription coactivator-1 (Crtc1). Interestingly, synaptic activity and spatial memory induces Crtc1 dephosphorylation (Ser151), nuclear translocation, and Crtc1-dependent transcription in the hippocampus, and these events are impaired in APPSw,Ind mice at early pathological and cognitive decline stages. CRTC1-dependent genes and CRTC1 levels are reduced in human hippocampus at intermediate Braak III/IV pathological stages. Importantly, adeno-associated viral-mediated Crtc1 overexpression in the hippocampus efficiently reverses Aβ-induced spatial learning and memory deficits by restoring a specific subset of Crtc1 target genes. Our results reveal a critical role of Crtc1-dependent transcription on spatial memory formation and provide the first evidence that targeting brain transcriptome reverses memory loss in AD

    La estructura sísmica de la corteza de la Zona de Ossa Morena y su interpretación geológica

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    El experimento de sísmica de reflexión profunda IBERSEIS ha proporcionado una imagen de la corteza del Orógeno Varisco en el sudoeste de Iberia. Este artículo se centra en la descripción de la corteza de la Zona de Ossa Morena (OMZ), que está claramente dividida en una corteza superior, con reflectividad de buzamiento al NE, y una corteza inferior de pobre reflectividad. Las estructuras geológicas cartografiadas en superficie se correlacionan bien con la reflectividad de la corteza superior, y en la imagen sísmica se ven enraizar en la corteza media. Ésta está constituida por un cuerpo muy reflectivo, interpretado como una gran intrusión de rocas básicas. La imagen de las suturas que limitan la OMZ muestra el carácter fuertemente transpresivo de la colisión orogénica varisca registrada en el sudoeste de Iberia. La Moho actual es plana y, en consecuencia, no se observa la raíz del orógeno

    Human-vehicle interaction for autonomous vehicles in crosswalk scenarios: Field experiments with pedestrians and passengers

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    This paper presents the results of real-world testing of human-vehicle interactions with an autonomous vehicle equipped with internal and external Human Machine Interfaces (HMIs) in a crosswalk scenario. The internal and external HMIs were combined with implicit communication techniques using gentle and aggressive braking maneuvers in the crosswalk. Results have been collected in the form of questionnaires and measurable variables such as distance or speed when the pedestrian decides to cross. The questionnaires show that pedestrians feel safer when the external HMI or the gentle braking maneuver is used interchangeably, while the measured variables show that external HMI only helps in combination with the gentle braking maneuver. The questionnaires also show that internal HMI only improves passenger confidence in combination with the aggressive braking maneuver.Comment: 6 pages, 7 figures, 4 tables, conferecence pape

    Group and call effect in achieving success in a subject: Analyses of the "Biology and Botany" whole life in the E.U.I.T.A. (University of Seville)

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    La Biología y la Botánica son dos materias fundamentales en la formación de un ingeniero técnico agrícola. Sus contenidos se han ofrecido a veces en asignaturas independientes y, en otras ocasiones como la que nos ocupa, en una sola asignatura. Por otra parte, siempre se ha mirado con interés, e incluso preocupación, el efecto de la variable grupo, de forma independiente o relacionándola con su distribución en turnos de mañana o tarde, así como la importancia de la convocatoria (en los distintos momentos a lo largo del curso académico) en la que el alumno consigue superar la asignatura. Aquí presentamos los resultados en la consecución de objetivos por parte de los alumnos y, por ende, de los profesores y de la Universidad de Sevilla a lo largo de la totalidad de la vida de la asignatura "Biología y Botánica" dentro del plan de estudios 2003/04 para tres titulaciones simultáneas, desde su comienzo en el curso 2003/04 hasta su extinción en el curso 2009/10, de la E.U.I.T.A. (Escuela Universitaria de Ingeniería Técnica Agrícola) de la Universidad de Sevilla. Además se consideran convocatorias pertenecientes al período de extinción añadido. Los análisis toman en cuenta además el éxito en la superación de la asignatura tanto de forma cualitativa (aprobado o suspenso de la evaluación a la que el alumno se ha sometido) como cuantitativa (nota conseguida). Las conclusiones obtenidas permiten mirar los resultados y la consecución de objetivos, así como una potencial toma de decisiones para el futuro, basándose en un marco temporal amplio y objetivo.Biology and Botany are two critical issues in the formation of a technical agricultural engineer. Their topics are sometimes offered in separate subjects and, at other times as here, within a single one. Besides, it has always been considered with interest, and even concern, the effect of the variable group, independently or in relation to their distribution in the morning or afternoon turns, and the importance of the call (at different times during the academic year) at which the student gets to pass the subject. Here we present the results in the achievement of objectives by students, and therefore teachers and the University of Seville, along the entire life of the subject "Biology and Botany" within the teaching 2003/04 plan for three simultaneous academic programs, from its start in the course 2003/04 to its extinction in the course 2009/10, in the E.U.I.T.A. (University School of Technical Agricultural Engineering) of the University of Seville. Calls belonging to the period of extinction are also considered. Analyses are both qualitative, based on having success in passing the subject or not, and quantitative (mark scored). Obtained conclusions let us see the results and the achievement of objectives, as well as a potential decision-making for the future, with a base on a comprehensive and objective frame

    Measurement of the cosmic ray spectrum above 4×10184{\times}10^{18} eV using inclined events detected with the Pierre Auger Observatory

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    A measurement of the cosmic-ray spectrum for energies exceeding 4×10184{\times}10^{18} eV is presented, which is based on the analysis of showers with zenith angles greater than 6060^{\circ} detected with the Pierre Auger Observatory between 1 January 2004 and 31 December 2013. The measured spectrum confirms a flux suppression at the highest energies. Above 5.3×10185.3{\times}10^{18} eV, the "ankle", the flux can be described by a power law EγE^{-\gamma} with index γ=2.70±0.02(stat)±0.1(sys)\gamma=2.70 \pm 0.02 \,\text{(stat)} \pm 0.1\,\text{(sys)} followed by a smooth suppression region. For the energy (EsE_\text{s}) at which the spectral flux has fallen to one-half of its extrapolated value in the absence of suppression, we find Es=(5.12±0.25(stat)1.2+1.0(sys))×1019E_\text{s}=(5.12\pm0.25\,\text{(stat)}^{+1.0}_{-1.2}\,\text{(sys)}){\times}10^{19} eV.Comment: Replaced with published version. Added journal reference and DO
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