Group-quantization of non-linear sigma models:particle on S2 revisited

We present the quantum mechanics of “partial-trace” non-linear sigma models, on the grounds of a fully symmetry-based procedure. After the general scheme is sketched, the particular example of a particle on the two-sphere is explicitly developed. As a remarkable feature, no explicit constraint treatment is required nor ordering ambiguities do appear. Moreover, the energy spectrum is recovered without extra terms in the curvature of the sphere.Work partially supported by the Spanish MCYT, Junta de Andalucía and Fundación Séneca under projects FIS2005-05736-C03-01, P06-FQM-01951 and 03100/PI/05. F. F. López Ruiz would like to thank the C.S.I.C. for an I3P grant

Canvis de residència en temps de COVID-19: una mica d'oxigen per al despoblament rural

Altres ajuts: "la Caixa" Social Research (SR21-00312) i Alan Turing Institute (1162533)Després de la irrupció de la pandèmia de COVID-19, diverses veus, sobretot des d'àmbits no acadèmics, van especular sobre un potencial èxode urbà cap a les àrees rurals. Malgrat això, aquesta hipòtesi no ha pogut ser corroborada fins ara a causa de la manca de dades amb el detall territorial adequat. En aquest Perspectives Demogràfiques es mostren els principals resultats d'una recerca del Centre d'Estudis Demogràfics i la Universitat Autònoma de Barcelona, que analitza les migracions internes entre les ciutats, els espais periurbans i les àrees rurals durant l'any 2020, i les compara amb els quatre anys que precedeixen la pandèmia. Per a l'anàlisi, s'utilitzen les microdades de l'Estadística de Variacions Residencials (EVR) de l'Institut Nacional d'Estadística (INE), que contenen tots els canvis de residència entre els 8.131 municipis espanyols. Els resultats de 2020 mostren alteracions remarcables, que es van plasmar principalment en un descens dels moviments cap a les ciutats i en un augment en les sortides des d'elles, especialment cap a municipis rurals. Aquests fluxos de persones van tenir un notable impacte demogràfic en les àrees rurals. Tanmateix, i malgrat els canvis observats, la major part de les migracions internes van ser majoritàriament entre ciutats, tal i com passava abans de la pandèmia, i tot apunta que es va tractar d'un fet conjuntural.After the outbreak of the COVID-19 pandemic, several commentators, especially from non-academic fields, speculated about a potential exodus from urban to rural areas. However, this hypothesis has not been confirmed due to a lack of data with information capturing changes of residence at local level. This issue of Perspectives Demogràfiques offers the main results of a study led by the Centre for Demographic Studies and the Autonomous University of Barcelona which analyses internal migration between cities, suburbs, and rural areas in 2020, compared to migration patterns during the four years preceding the pandemic. The analysis used microdata from the Residential Variation Statistics (EVR) of the Spanish Statistical Office (INE) which cover all changes of residence in the country's 8,131 municipalities. The results show significant changes in internal migration patterns during 2020. Inmigration to cities decreased, while out-migration increased, especially to rural areas. The latter flow had an important demographic impact on country villages. Despite these changes, internal migratory movements between and within urban areas dominated, as they did prior to the pandemic. At the same time, monthly data suggest that the changes are likely a temporary outcome.Tras la irrupción de la pandemia de COVID-19, diversas voces, sobre todo desde ámbitos no académicos, especularon acerca de un potencial éxodo urbano hacia las áreas rurales. Sin embargo, esta hipótesis no ha podido ser corroborada hasta ahora debido a la falta de datos con el detalle territorial adecuado. En este Perspectives Demogràfiques se muestran los principales resultados de una investigación liderada por el Centre d'Estudis Demogràfics y la Universidad Autónoma de Barcelona, analizando las migraciones internas entre las ciudades, los espacios periurbanos y las áreas rurales durante el año 2020, comparando con los cuatro años que preceden a la pandemia. Para el análisis, se utilizan los microdatos de la Estadística de Variaciones Residenciales (EVR) del Instituto Nacional de Estadística (INE), que contienen todos los cambios de residencia entre los 8.131 municipios españoles. Los resultados muestran alteraciones reseñables en 2020, que se plasmaron principalmente en un descenso de los movimientos hacia las ciudades y en un aumento en las salidas desde ellas, especialmente hacia municipios rurales. Estos flujos de personas tuvieron un notable impacto demográfico en las áreas rurales. No obstante, a pesar de los cambios observados, la mayor parte de las migraciones internas fueron mayoritariamente entre ciudades, al igual que antes de la pandemia, y todo apunta a que se trató de un hecho coyuntural

Editorial: role of the surface in peri-implant bone biology

info:eu-repo/semantics/publishedVersio

A framework to identify primitives that represent usability within Model-Driven Development methods

Context: Nowadays, there are sound methods and tools which implement the Model-Driven Development approach (MDD) satisfactorily. However, MDD approaches focus on representing and generating code that represents functionality, behaviour and persistence, putting the interaction, and more specifically the usability, in a second place. If we aim to include usability features in a system developed with a MDD tool, we need to extend manually the generated code. Objective: This paper tackles how to include functional usability features (usability recommendations strongly related to system functionality) in MDD through conceptual primitives. Method: The approach consists of studying usability guidelines to identify usability properties that can be represented in a conceptual model. Next, these new primitives are the input for a model compiler that generates the code according to the characteristics expressed in them. An empirical study with 66 subjects was conducted to study the effect of including functional usability features regarding end users' satisfaction and time to complete tasks. Moreover, we have compared the workload of two MDD analysts including usability features by hand in the generated code versus including them through conceptual primitives according to our approach. Results: Results of the empirical study shows that after including usability features, end users' satisfaction improves while spent time does not change significantly. This justifies the use of usability features in the software development process. Results of the comparison show that the workload required to adapt the MDD method to support usability features through conceptual primitives is heavy. However, once MDD supports these features, MDD analysts working with primitives are more efficient than MDD analysts implementing these features manually. Conclusion: This approach brings us a step closer to conceptual models where models represent not only functionality, behaviour or persistence, but also usability features. (C) 2014 Elsevier B.V. All rights reserved.This work was developed with the support of the Spanish Ministry of Science and Innovation Project SMART ADAPT (TIN201342981-P), TIN2011-23216 and was co-financed by ERDF. It also has the support of Generalitat Valenciana-funded ORCA Project (PROMETEO/2009/015) and UV (UV-INV-PRECOMP13-115032).Panach Navarrete, JI.; Juristo, N.; Valverde Giromé, F.; Pastor López, O. (2015). A framework to identify primitives that represent usability within Model-Driven Development methods. Information and Software Technology. (58):338-354. https://doi.org/10.1016/j.infsof.2014.07.002S3383545

Bloqueo paravertebral una buena alternativa en analgesia local o regional

El bloqueo paravertebral torácico o bloqueo intercostal extrapleural consiste en la administración de anestésicoslocales en el espacio paravertebral adyacente al foramen intervertebral por donde emergen los nervios espinales,obteniendo un bloqueo somático y simpático ipsilateral en varios dermatomas contiguos, por encima y abajo delsitio de inyección. Es una técnica muy fácil de realizar y con una alta tasa de éxito. Este tipo de bloqueo puedeestar indicado en cualquier tipo de patología dolorosa que afecte a la región toracoabdominal de forma unilateral.La realización de un bloqueo paravertebral continuo como parte de un régimen de analgesia balanceadaproporciona una analgesia óptima tras toracotomías, comparable con el estándar de oro como es la analgesiaepidural torácica y a la que se podría considerar como una alternativa segura y con menos riesgo decomplicaciones. PALABRAS CLAVE: Anestesia. Anestesia de conducción. Bloqueo nervioso. Cirugía torácica. Analgesia

Supporting Navigation Accessibility Requirements in Web Engineering Methods

[EN] Web accessibility not only guarantees universal user access to the Web, but also provides interesting benefits for Web development. In order to achieve the goal of Web accessibility, an interesting approach is the incorporation of accessibility requirements into current Web engineering methods. This article presents the Accessibility for Web Applications (AWA) approach with the aim of integrating accessibility into Web engineering methods. The paper also discusses the application of the AWA approach to the Object- Oriented Web Solutions (OOWS) engineering method to produce accessible Web applications with a focus on navigational requirements. In order to demonstrate the practical applicability and usefulness of the approach, a proof of concept is described, the results of which indicating the satisfaction of navigation accessibility requirements. With the application of the AWA approach in the model-driven development (MDD) method, previously-defined OOWS models have been extended with the accessibility criteria, providing resources for the required changes in the process.This study has been developed with the support of the MAVIR Research Network (S2009/TIC-1542 [www.mavir.net/]), MULTIMEDICA PROJECT(tin201020644-c03-01) and the Spanish Ministry of Science and Innovation through the project, PROS-Req TIN2010-19130-C02-02. Co-financing was received from the ERDF.Moreno, L.; Valverde Giromé, F.; Martinez, P.; Pastor López, O. (2013). Supporting Navigation Accessibility Requirements in Web Engineering Methods. Journal of Web Engineering. 12(3):181-202. http://hdl.handle.net/10251/44342S18120212

Assessment of Maternal Effects and Genetic Variability in Resistance to Verticillium dahliae in Olive Progenies

The use of genetic resistance is likely the most efficient, economically convenient and environmentally friendly control method for plant diseases, as well as a fundamental piece in an integrated management strategy. This is particularly important for woody crops affected by diseases in which mainly horizontal resistance mechanisms are operative, such as Verticillium wilt, caused by Verticillium dahliae. In this study, we analyzed the variability in resistance to Verticillium wilt of olive trees in progenies from five crosses: ‘Picual’ × ‘Frantoio’, ‘Arbosana’ × ‘Koroneiki’, ‘Sikitita’ × ‘Arbosana’, ‘Arbosana’ × ‘Frantoio’ and ‘Arbosana’ × ‘Arbequina’ and their respective reciprocal crosses. Additionally, seedlings of ‘Picual’ and ‘Frantoio’ in open pollination were used as controls. In October 2016 and 2018, the fruits were harvested, and seeds germinated. Six-week-old seedlings were inoculated by dipping their bare roots in a conidial suspension of V. dahliae, and disease progress in terms of symptom severity and mortality was evaluated weekly. Additionally, seedling growth was evaluated every two weeks. At the end of the experiment, no significant differences were found for any of the assessed parameters when reciprocal crosses were compared. These results suggest that there is no maternal or paternal effect in regard to the heritability of resistance. In addition, this study identifies the best crosses for obtaining the highest number of resistant genotypes, highlighting the importance of the selection of specific cultivars to optimize the breeding process

DSL Development with Geneticists

This document is a proof of concept of the DSL development method proposed in the PhD of Maria Jose Villanueva, whose title is "An agile model-driven method for involving end-users in DSL develoment". This report explains in detail the artefacts created in the different stages of DSL development to develop a DSL for the genetic analysis domain.Villanueva Del Pozo, MJ.; Valverde Giromé, F.; Pastor López, O. (2015). DSL Development with Geneticists. http://hdl.handle.net/10251/5732

Software for the Genetic Analysis Domain

In this report we overview the state of the art in software for genetic analysis, starting from software tools for genetic analysis, moving on to software tools for genomic analysis, and ending with bioinformatic pipeline development environments.Villanueva Del Pozo, MJ.; Valverde Giromé, F.; Pastor López, O. (2015). Software for the Genetic Analysis Domain. http://hdl.handle.net/10251/5742

Guest Induced Strong Cooperative One- and Two-Step Spin Transitions in Highly Porous Iron(II) Hofmann-Type Metal-Organic Frameworks

[EN] The synthesis, crystal structure, magnetic, calorimetric, and Mo¿ ssbauer studies of a series of new Hofmann-type spin crossover (SCO) metal¿organic frameworks (MOFs) is reported. The new SCO-MOFs arise from self-assembly of FeII, bis(4-pyridyl)butadiyne (bpb), and [Ag(CN)2] ¿ or [MII(CN)4] 2¿ (MII = Ni, Pd). Interpenetration of four identical 3D networks with ¿-Po topology are obtained for {Fe(bpb)[AgI (CN)2]2} due to the length of the rod-like bismonodentate bpb and [Ag(CN)2] ¿ ligands. The four networks are tightly packed and organized in two subsets orthogonally interpenetrated, while the networks in each subset display parallel interpenetration. This nonporous material undergoes a very incomplete SCO, which is rationalized from its intricate structure. In contrast, the single network Hofmann-type MOFs {Fe(bpb)[MII(CN)4]}·nGuest (MII = Ni, Pd) feature enhanced porosity and display complete one-step or two-step cooperative SCO behaviors when the pores are filled with two molecules of nitrobenzene or naphthalene that interact strongly with the pyridyl and cyano moieties of the bpb ligands via ¿¿¿ stacking. The lack of these guest molecules favors stabilization of the high-spin state in the whole range of temperatures. However, application of hydrostatic pressure induces one- and two-step SCO.We thank the Spanish Ministerio de Economia y Competitividad (MINECO) and FEDER funds (CTQ2013-46275-P and CTQ2016-78341-P and Unidad de Excelencia Maria de Maeztu MDM-2015-0538) and Generalitat Valenciana (PROMETEO/2016/147). L.P.-L. and F.J.V.-M. thank, respectively, the Universidad de Valencia and MINECO for a predoctoral FPI grant.Piñeiro-López, L.; Valverde-Muñoz, FJ.; Seredyuk, M.; Muñoz Roca, MDC.; Haukka, M.; Real, JA. (2017). Guest Induced Strong Cooperative One- and Two-Step Spin Transitions in Highly Porous Iron(II) Hofmann-Type Metal-Organic Frameworks. Inorganic Chemistry. 56(12):7038-7047. https://doi.org/10.1021/acs.inorgchem.7b00639S70387047561