Explicit parametric solutions of lattice structures with proper generalized decomposition (PGD): applications to the design of 3D-printed architectured materials

The final publication is available at Springer via http://dx.doi.org/10.1007/s00466-017-1534-9Architectured materials (or metamaterials) are constituted by a unit-cell with a complex structural design repeated periodically forming a bulk material with emergent mechanical properties. One may obtain specific macro-scale (or bulk) properties in the resulting architectured material by properly designing the unit-cell. Typically, this is stated as an optimal design problem in which the parameters describing the shape and mechanical properties of the unit-cell are selected in order to produce the desired bulk characteristics. This is especially pertinent due to the ease manufacturing of these complex structures with 3D printers. The proper generalized decomposition provides explicit parametic solutions of parametric PDEs. Here, the same ideas are used to obtain parametric solutions of the algebraic equations arising from lattice structural models. Once the explicit parametric solution is available, the optimal design problem is a simple post-process. The same strategy is applied in the numerical illustrations, first to a unit-cell (and then homogenized with periodicity conditions), and in a second phase to the complete structure of a lattice material specimen.Peer ReviewedPostprint (author's final draft

Lenguajes de la evangelización en la cultura popular. Los lenguajes del franciscanismo

Los franciscanos desarrollaron una religiosidad más humanista, volcada en el individuo; pensada para y por el fiel. No utilizaron el latín, lengua en la que se expresaba la Iglesia de la época, sino la lengua vernácula de cada pueblo. Junto a ello desarrollaron prácticas religiosas en las que la imagen visual y sentimental era importante, seguros de que este lenguaje llegaba fácilmente al corazón del hombre sencillo.Franciscans developed a more humanist religiousness pinned on the individual person; designed to the faithfull. They didn’t use Latin, that was the language spoken by the Church in those days, but the vernacular language in each village. Furthermore, the developed religious practices in which the visual and sentimental image was veryimportant, sure that this language touched the simple humanbody deeply in an easy way.peerReviewe

Aproximación a la arquitectura de los templos cristianos y musulmanes desde sus orígenes hasta finales del siglo XV. Semejanzas, diferencias y evolución

El artículo supone una retrospectiva –aproximación– a la arquitectura cristiana y musulmana desde sus orígenes. Se van señalando las características generales de las etapas fundamentales como el paleocristianismo, la época bizantina, el inicio del Islam…, un recorrido interesante donde semejanzas y espíritu propio se recrean en el territorio de al-Andalus.The article looks back into the history of Christian and Muslim architecture from its origins. It is an overview of the general features of its main stages, such as Paleochristian art, Byzantine times and the beginning of Islamism. It is an interesting outline where similarities and an idiosyncratic spirit take pleasure in al-Andalus territory

Catalogación automática

Modele de classement centralisé où il suffit de réaliser une seule fois la description bibliographique des documents. Il est aussi possible de les récupérer automatiquement d'une manière illimitée el permettant une économie de temps et de moyens humains.A model of centralized cataloging in a which a single bibliographic description of the documents enables automatic and unlimited retrieval with an economy of time and human resources.Publicad

Cognitive outcome and gamma noise power unrelated to neuregulin 1 and 3 variation in schizophrenia

Background Neuregulins are a family of signalling proteins that orchestrate a broad range of cellular responses. Four genes encoding Neuregulins 1–4 have been identified so far in vertebrates. Among them, Neuregulin 1 and Neuregulin 3 have been reported to contribute to an increased risk for developing schizophrenia. We hypothesized that three specific variants of these genes (rs6994992 and rs3924999 for Neuregulin 1 and rs10748842 for Neuregulin 3) that have been related to this illness may modify information processing capacity in the cortex, which would be reflected in electrophysiological parameters (P3b amplitude or gamma noise power) and/or cognitive performance. Methods We obtained DNA from 31 patients with schizophrenia and 23 healthy controls and analyzed NRG1 rs6994992, NRG1 rs3924999 and NRG3 rs10748842 promoter polymorphisms by allelic discrimination with real-time polymerase chain reaction (PCR). We compared cognitive outcome, P300 amplitude parameters and an electroencephalographic measure of noise power in the gamma band between the groups dichotomized according to genotype. Results Contrary to our hypothesis, we could not detect any significant influence of variation in Neuregulin 1/Neuregulin 3 polymorphisms on cognitive performance or electrophysiological parameters of patients with schizophrenia. Conclusions Despite our findings, we cannot discard that other genetic variants and, more likely, interactions between those variants and with genetic variation related to different pathways may still influence cerebral processing in schizophrenia

Improvement of InAs quantum dots optical properties in close proximity to GaAs(0 0 1) substrate surface

5 páginas, 4 figuras.-- PACS codes: 78.67.Hc; 81.05.Ea; 81.07.Ta; 81.15.Hi; 81.16.DnIn this work we demonstrate a growth process for obtaining high optical emission efficiency InAs/GaAs(0 0 1) quantum dots (QD) formed at short distance to the interface with the GaAs substrate. In particular, after an initial exposure of the substrate surface to long times of atomic hydrogen flux (tH up to 45 min) followed by a posterior growth of a GaAs buffer layer by atomic layer molecular beam epitaxy, both steps at low substrate temperature (TS=450 °C), an enhancement of InAs QD optical emission efficiency is obtained, even at close proximity (3.5 nm) to the substrate interface. This process fulfils the strict requirements in terms of substrate temperature and buffer layer thickness (distance from the QD to the substrate interface) for its possible use as an optimal regrowth protocol on previously patterned GaAs substrates.This work was financed by Spanish MEC(TEC2005-05781-C03- 01,NAN2004-09109-C04-01,Consolider-Ingenio 2010CSD2006- 00019),CAM (S 0505ESP0200)and by the SANDIE Network of excellence(Contract no. NMP4-CT-2004-500101 group TEP-0120). JMS and PAG thank the I3Pprogram.Peer reviewe

Plataforma hardware universal para prácticas sobre sistemas electrónicos analógico-digitales avanzados en régimen de semipresencialidad

Aquest projecte tracta d’implementar una metodologia per fer pràctiques d’Electrònica Analògica amb circuits avançats que es puguin configurar fàcilment dins d’una placa hardware universal. Aquesta metodologia es basa en el procés habitual que segueixen els dissenyadors electrònics i consta de tres fases: 1- disseny i càlcul teòric del circuit 2- simulació del circuit 3- mesures sobre un prototip 4- validació del disseny Aquest procés s’ha de fer seqüencialment i estaria controlat per un programa web que donaria als estudiants el timing correcte de les tasques a realitzar i els ajudaria amb els continguts teòrics necessaris. El fet de que el programa sigui web facilita la semipresencialitat de les sessions de laboratori i permet una gran millora a l’autoaprenentatge dels estudiants. Tant el software que controla la metodologia com el material de pràctiques es transferible a qualsevol assignatura que faci pràctiques de circuits analògics