Maximal qubit violation of n-locality inequalities in a star-shaped quantum network

Bellʼs theorem was a cornerstone for our understanding of quantum theory and the establishment ofBell non-locality played a crucial role in the development of quantum information. Recently, itsextension to complex networks has been attracting growing attention, but a deep characterization ofquantum behavior is still missing for this novel context. In this work we analyze quantum correlationsarising in the bilocality scenario, that is a tripartite quantum network where the correlations betweenthe parties are mediated by two independent sources of states. First, we prove that non-bilocalcorrelations witnessed through a Bell-state measurement in the central node of the network form asubset of those obtainable by means of a local projective measurement. This leads us to derive themaximal violation of the bilocality inequality that can be achieved by arbitrary two-qubit quantumstates and arbitrary local projective measurements. We then analyze in details the relation between theviolation of the bilocality inequality and the CHSH inequality. Finally, we show how our method canbe extended to then-locality scenario consisting ofntwo-qubit quantum states distributed amongn1+nodes of a star-shaped networ

Camera calibration for coastal monitoring using available snapshot images

Joint intrinsic and extrinsic calibration from a single snapshot is a common requirement in coastal monitoring practice. This work analyzes the influence of different aspects, such as the distribution of Ground Control Points (GCPs) or the image obliquity, on the quality of the calibration for two different mathematical models (one being a simplification of the other). The performance of the two models is assessed using extensive laboratory data (i.e., snapshots of a grid). While both models are able to properly adjust the GCPs, the simpler model gives a better overall performance when the GCPs are not well distributed over the image. Furthermore, the simpler model allows for better recovery of the camera position and orientation.Postprint (author's final draft

Modeling the Odor Generation in WWTP: An Integrated Approach Review

International audienceNuisance odors generation from waste and wastewater treatment plants are a cause of public discomfort and complaints. This situation impairs the air quality and represents a growing social and public health problem, especially in developing countries. Several modeling approaches have been developed and successfully implemented in the frame of a wastewater treatment plant for both the biological treatment and physicochemical processes. The mathematical modeling of the odor generation process is still considered a quite complex issue, mainly due to the fact that olfactory nuisance can be caused by many different chemical compounds and the perception of odors is influenced by subjective thresholds. Moreover, the impact of odor sources on air quality is highly conditioned by complex atmospheric dispersion processes. This review presents a critical state-of-art and assessment where information related to odor emissions impact studies as well as modeling applications are compiled and discussed

La imagen de los partidos políticos en El Informal, CQC y Las Noticias del Guiñol en las elecciones legislativas de 2001

El objeto de este artículo es dar a conocer la imagen de los principales partidos políticos nacionales ofrecida por tres programas de televisión que realizan parodias políticas en nuestro país: Caiga quien caiga y El informal, ambos de Tele 5, y Las noticias del guiñol de Canal+.Entre sus resultados destaca la falta de neutralidad que mantuvieron en el tratamiento tanto cuantitativo: tiempo de cobertura informativa dedicada a cada partido, como cualitativo: sesgo positivo o negativo encontrado en la exposición de la campaña electoral realizada por cada uno de los partidos políticos, ya que, aunque en este análisis se parte del estudio de programas de televisión, que desde el humor suelen ridiculizar, se ha detectado una parcialidad muy notable en el tratamiento de los partidos y de sus líderes políticos. El análisis de contenido de los tres programas indica que se intentó favorecer al PSOE y a Joaquín Almunia, frente al PP y José Mª Aznar

La imagen de los partidos políticos en El Informal, CQC y Las Noticias del Guiñol en las elecciones legislativas de 2001

Producción CientíficaEl objeto de este artículo es dar a conocer la imagen de los principales partidos políticos nacionales ofrecida por tres programas de televisión que realizan parodias políticas en nuestro país: Caiga quien caiga y El informal, ambos de Tele 5, y Las noticias del guiñol de Canal+. Entre sus resultados destaca la falta de neutralidad que mantuvieron en el tratamiento tanto cuantitativo: tiempo de cobertura informativa dedicada a cada partido, como cualitativo: sesgo positivo o negativo encontrado en la exposición de la campaña electoral realizada por cada uno de los partidos políticos, ya que, aunque en este análisis se parte del estudio de programas de televisión, que desde el humor suelen ridiculizar, se ha detectado una parcialidad muy notable en el tratamiento de los partidos y de sus líderes políticos. El análisis de contenido de los tres programas indica que se intentó favorecer al PSOE y a Joaquín Almunia, frente al PP y José Mª Aznar.This paper explains the results of qualitative and quantitative research carried out along the campaign for the 2000 Spanish elections. The aim of this research was to get to know the image of the three main national parties presented at the three TV programmes which parody Politics in the country: "Caiga quien caiga" and "El Informal" (both broadcast by Tele 5) and "Las noticias del Guiñol" (by Canal +). The timelength of informative coverage of each party was measured in the quantitative analysis. The aim of the qualitative one was to know if the slant on the presentation of the parties was positive or negative; even considering that this type of programmes are parodical in themselves. The analysis of the contents of the programmes shows a lack of neutrality. The PSOE and Joaquín Almunia were favoured, against PP and Jose Mª Aznar

Revisión de políticas de vivienda en contextos de vulnerabilidad socio-residencial: cinco barrios de Barcelona

El concepto de vulnerabilidad socio-residencial guarda una relación de doble sentido con la política de vivienda¿. La intervención pública en materia de vivienda se erige como herramienta para contrarrestarla, siendo a su vez el principal mecanismo que la consolida. El presente artículo pretende operacionalizar las dimensiones de la vulnerabilidad socio-residencial y analizar la política de vivienda en el Estado español. Se propone una revisión bibliográfica y una estrategia de análisis cualitativo de cinco barrios catalogados como vulnerables en la ciudad de Barcelona. Como resultado, se determina cómo algunos aspectos de la política de vivienda (binomio de la tenencia en propiedad e impulso productivista, gasto público insuficiente y fiscalidad regresiva, producción deficiente de vivienda protegida) generan estructuralmente segregación, degradación del parque y exclusión residencial, y se exploran vías alternativas para su superación, vinculadas al fortalecimiento de la administración, la reducción de costes y la potenciación del alquiler social.Postprint (published version

Estudio y análisis de precisión de diversos navegadores GNSS de bajo costo

En la actualidad existe una gran oferta de receptores satelitales de bajo costo con importantes prestaciones, como la capacidad de rastrear múltiples constelaciones, gran número de canales de recepción, mayor capacidad de procesamiento, entre otras. El presente artículo se centra en el estudio, desarrollo y análisis de precisión de nuevas metodologías operativas con diferentes navegadores satelitales GNSS de bajo costo versus un receptor geodésico de alta precisión, a fin de obtener un estudio detallado sobre los alcances e integridad de los datos obtenidos. Las pruebas se realizaron con cuatro receptores GNSS sobre un vértice del polígono de control GNSS emplazado en la Ciudad Universitaria de la Universidad Nacional de Córdoba, Argentina

Spectroelectrochemical behavior of polycrystalline gold electrode modified by reverse micelles.

The increasing demand for raising the reliability of electronic contacts has led to the development of methods that protect metal surfaces against atmospheric corrosion agents. This severe problem implies an important economic cost annually but small amounts of corrosion inhibitors can control, decrease or avoid reactions between a metal and its environment. In this regard, surfactant inhibitors have displayed many advantages such as low price, easy fabrication, low toxicity and high inhibition efficiency. For this reason, in this article, the spectroelectrochemical behavior of polycrystalline gold electrode modified by reverse micelles (water/polyethyleneglycol-dodecylether (BRIJ 30)/n-heptane) is investigated by atomic force microscopy (AFM), potentiodynamic methods and electrochemical impedance spectroscopy (EIS). Main results indicate a strong adsorption of a monolayer of micelles on the gold substrate in which electron tunneling conduction is still possible. Therefore, this method of increasing the corrosion resistance of gold contacts is usable only in conditions of long-term storage but not in the operation of devices with such contacts. In this regard, the micelle coating must be removed from the surface of the gold contacts before use. Finally, the aim of the present work is to understand the reactions occurring at the surfactant/metal interface, which may help to improve the fabrication of novel electrodes

Spread of a SARS-CoV-2 variant through Europe in the summer of 2020.

Following its emergence in late 2019, the spread of SARS-CoV-21,2 has been tracked by phylogenetic analysis of viral genome sequences in unprecedented detail3–5. Although the virus spread globally in early 2020 before borders closed, intercontinental travel has since been greatly reduced. However, travel within Europe resumed in the summer of 2020. Here we report on a SARS-CoV-2 variant, 20E (EU1), that was identified in Spain in early summer 2020 and subsequently spread across Europe. We find no evidence that this variant has increased transmissibility, but instead demonstrate how rising incidence in Spain, resumption of travel, and lack of effective screening and containment may explain the variant’s success. Despite travel restrictions, we estimate that 20E (EU1) was introduced hundreds of times to European countries by summertime travellers, which is likely to have undermined local efforts to minimize infection with SARS-CoV-2. Our results illustrate how a variant can rapidly become dominant even in the absence of a substantial transmission advantage in favourable epidemiological settings. Genomic surveillance is critical for understanding how travel can affect transmission of SARS-CoV-2, and thus for informing future containment strategies as travel resumes. © 2021, The Author(s), under exclusive licence to Springer Nature Limited