Properties of thermal quantum states: locality of temperature, decay of correlations, and more

We review several properties of thermal states of spin Hamiltonians with short range interactions. In particular, we focus on those aspects in which the application of tools coming from quantum information theory has been specially successful in the recent years. This comprises the study of the correlations at finite and zero temperature, the stability against distant and/or weak perturbations, the locality of temperature and their classical simulatability. For the case of states with a finite correlation length, we overview the results on their energy distribution and the equivalence of the canonical and microcanonical ensemble.Comment: v1: 10 pages, 4 figures; v2: minor changes, close to published versio

EcoPat

This Project aims to design a service based in an eco-friendly mean of transport, electric kick-scooters, devoted to private and public domain. The starting point of this study will be the Toulouse-Labège Campus of INPT. The main goals of the project, in decreasing order of importance, are the following: Ø Sizing of the whole system (number of stations, number of patinettes) depending on the number of users, the number of buildings, the average flows and distances between these buildings. Ø Design of the charge stations. Ø Design of the electric kick-scooter bodywork. Ø Describe the operation of the whole service. Ø Seize the economic effort needed and elaborate a Business Plan accordingly. Ø Take into account the economic key figures of the whole system CapEx & OpEx. Ø Appreciate the key figures ruling the extension of this context to a wider study case. The last target points out the need for abstraction and for a theoretical approach all along this study, beginning with a literature overview.Outgoin

Numerical wave modeling analysis in the port of Barcelona with REEF3D

[ES] El modelo matemático utilizado en el estudio del oleaje es REEF3D::FNPF, un modelo de resolución en fase (Phase-resolving) basado en la resolución de la equación de Laplace. Para llevar a cabo dicho estudio se han realizado diversas simulaciones. Primero se realizaron dos estudios de convergencia, bidimensional y tridimensional. Una vez establecido el tamaño de celda a usar para una simulación eficiente del oleaje se llevaron a cabo diversas simulaciones para el estudio del oleaje. Estas simulaciones a parte de proporcionar la altura de ola significante, el periodo pico y el espectro de energía en los puntos deseados también nos proporcionó una reconstrucción del oleaje a lo largo del espacio y tiempo. Mediante esta reconstrucción fenómenos como la difracción, refracción y reflexión han sido estudiados conjuntamente con la altura de ola significante, los periodos predominantes y la energía del oleaje (densidad espectral) en el exterior e interior del puerto, especialmente en la zona entre el Muelle de la Energía y el Muelle Prat, donde el nuevo pantalán ha sido proyectado.[EN] The numerical wave model chosen for this thesis is the phase-resolving model REEF3D ::FNPF. Several simulations were carried out to ensure a proper representation of the wave transformation phenomena. Convergence studies were made in order to select an effective and efficient cell size for the numerical domain. After determining the cell size, three simulations were made with different significant wave heights and peak periods to ensure concurrent results. To select the most unfavorable scenario, the maximum annual significant wave height was selected in the most unfavorable direction for the area regarding the new dock, the southeastern incident waves. The analysis of wave conditions at the harbor show that strong wave transformation phenomena take place. Thanks to the visual representation of the wave field these phenomena can be observed and studied. This together with the speed and accuracy obtained in the results, make REEF3D::FNPF a great tool for harbor modeling. The strong diffraction and energy dissipation in the southern entrance of the Barcelona harbor make possible the introduction of a new dock, as they significantly reduce the significant wave height and the spectral energy density.Arnau Landaluce, PM. (2021). Numerical wave modeling analysis in the port of Barcelona with REEF3D. Universitat Politècnica de València. http://hdl.handle.net/10251/180417TFG

Complex-based controller for a three-phase inverter with an LCL filter connected to unbalanced grids

A new controller for a grid-connected inverter with an LCL filter is proposed in this paper. The system is described by its complex representation, and the controller is designed using the complex root locus method. The complex representation allows a considerable reduction in the order of the system, simplifying the design task and making it possible to use advanced techniques, such as the complex root locus. The new complex controller adds an extra degree of freedom that makes it possible to move the poles of the systems and to improve the stability and speed of response compared with the conventional controls. This paper includes a detailed discussion of the effect of the gains of the controller on the root locus. The proposal is validated with simulation and experimental results.Fil: Doria Cerezo, Arnau. Universidad Politécnica de Catalunya; EspañaFil: Serra, Federico Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Investigaciones en Tecnología Química. Universidad Nacional de San Luis. Facultad de Química, Bioquímica y Farmacia. Instituto de Investigaciones en Tecnología Química; ArgentinaFil: Bodson, Marc. University of Utah; Estados Unido

Sliding mode control of a dc-dc dual active bridge using the generalized space-state averaging description

This paper presents a sliding mode control strategy for a dc-dc dual active bridge converter. The controller is based on a truncated model obtained using the generalized state space averaging method that transforms the mixed dcac dynamics of the converter into a regulation problem. The proposed controller, that uses a dynamic extension to overcome the structural problem of the non-affine control input, provides good results in terms of performance and robustness. Numerical simulations are included to validate the proposed modelling methodology and the control design.Peer ReviewedPostprint (published version

Utilization of Porcine Livers through the Formation of Zn-Protoporphyrin Pigment Optimized by a Response Surface Methodology

There is a growing demand for clean-label products. This study aimed to obtain a food-grade coloring ingredient for meat products based on the formation of Zn-protoporphyrin from porcine livers, thus contributing to the development of nitrite-free products. First, the effects of sodium disulfite and acetic, ascorbic, and lactic acids on the formation of Zn-protoporphyrin and the total microbial count were studied. The combination of ascorbic and acetic acids resulted in a higher Zn-protoporphyrin content than acetic acid alone, and microbial levels were maintained (ca. 3 log CFU/mL). Second, a response surface methodology was used to maximize Zn-protoporphyrin while maintaining microbiological food standards. To that end, the effects of pH (4.2–5.4), incubation time (3–30 h), and temperature (25–50 °C) were studied. The selected conditions for Zn-protoporphyrin formation involved anaerobic incubation at pH 4.8 and 45 °C for 24 h. The safety was validated through challenge testing for relevant pathogens (Listeria monocytogenes, Salmonella spp., and Clostridium perfringens). A significant reduction (>6 log units) was observed in the selected conditions for L. monocytogenes and Salmonella, whereas C. perfringens spores remained at the inoculated levels. The optimized procedure is proven to be microbiologically safe, and may improve the color of nitrite-free meat products.info:eu-repo/semantics/publishedVersio

High-throughput identification of C/D box snoRNA targets with CLIP and RiboMeth-seq

High-throughput sequencing has greatly facilitated the discovery of long and short non-coding RNAs (ncRNAs), which frequently guide ribonucleoprotein complexes to RNA targets, to modulate their metabolism and expression. However, for many ncRNAs, the targets remain to be discovered. In this study, we developed computational methods to map C/D box snoRNA target sites using data from core small nucleolar ribonucleoprotein crosslinking and immunoprecipitation and from transcriptome-wide mapping of 2'-O-ribose methylation sites. We thereby assigned the snoRNA guide to a known methylation site in the 18S rRNA, we uncovered a novel partially methylated site in the 28S ribosomal RNA, and we captured a site in the 28S rRNA in interaction with multiple snoRNAs. Although we also captured mRNAs in interaction with snoRNAs, we did not detect 2'-O-methylation of these targets. Our study provides an integrated approach to the comprehensive characterization of 2'-O-methylation targets of snoRNAs in species beyond those in which these interactions have been traditionally studied and contributes to the rapidly developing field of 'epitranscriptomics'

A Novel Typing Method for Streptococcus pneumoniae Using Selected Surface Proteins

The diverse pneumococcal diseases are associated with different pneumococcal lineages, or clonal complexes. Nevertheless, intra-clonal genomic variability, which influences pathogenicity, has been reported for surface virulence factors. These factors constitute the communication interface between the pathogen and its host and their corresponding genes are subjected to strong selective pressures affecting functionality and immunogenicity. First, the presence and allelic dispersion of 97 outer protein families were screened in 19 complete pneumococcal genomes. Seventeen families were deemed variable and were then examined in 216 draft genomes. This procedure allowed the generation of binary vectors with 17 positions and the classification of strains into surfotypes. They represent the outer protein subsets with the highest inter-strain discriminative power. A total of 116 non-redundant surfotypes were identified. Those sharing a critical number of common protein features were hierarchically clustered into 18 surfogroups. Most clonal complexes with comparable epidemiological characteristics belonged to the same or similar surfogroups. However, the very large CC156 clonal complex was dispersed over several surfogroups. In order to establish a relationship between surfogroup and pathogenicity, the surfotypes of 95 clinical isolates with different serogroup/serotype combinations were analyzed. We found a significant correlation between surfogroup and type of pathogenic behavior (primary invasive, opportunistic invasive, and non-invasive). We conclude that the virulent behavior of S. pneumoniae is related to the activity of collections of, rather than individual, surface virulence factors. Since surfotypes evolve faster than MLSTs and directly reflect virulence potential, this novel typing protocol is appropriate for the identification of emerging clones.This work was supported by a Miguel Servet contract from the Spanish Ministry of Health to AM, Plan Nacional de I+D+I of the Ministry of Science and Innovation (BIO2011-25343, BIO2014-555462-R, SAF2012-39444-C02), Fondo de Investigaciones Sanitarias de la Seguridad Social (PI11/00763) and Fondo Europeo de Desarrollo Regional (FEDER). CIBER Enfermedades Respiratorias is an initiative of the Instituto de Salud Carlos III.Peer reviewedPeer Reviewe

The large-scale Quasar-Lyman \alpha\ Forest Cross-Correlation from BOSS

We measure the large-scale cross-correlation of quasars with the Lyman \alpha\ forest absorption in redshift space, using ~ 60000 quasar spectra from Data Release 9 (DR9) of the Baryon Oscillation Spectroscopic Survey (BOSS). The cross-correlation is detected over a wide range of scales, up to comoving separations r of 80 Mpc/h. For r > 15 Mpc/h, we show that the cross-correlation is well fitted by the linear theory prediction for the mean overdensity around a quasar host halo in the standard \Lambda CDM model, with the redshift distortions indicative of gravitational evolution detected at high confidence. Using previous determinations of the Lyman \alpha\ forest bias factor obtained from the Lyman \alpha\ autocorrelation, we infer the quasar bias factor to be b_q = 3.64^+0.13_-0.15 at a mean redshift z=2.38, in agreement with previous measurements from the quasar auto-correlation. We also obtain a new estimate of the Lyman \alpha\ forest redshift distortion factor, \beta_F = 1.1 +/- 0.15, slightly larger than but consistent with the previous measurement from the Lyman \alpha\ forest autocorrelation. The simple linear model we use fails at separations r < 15 Mpc/h, and we show that this may reasonably be due to the enhanced ionization due to radiation from the quasars. We also provide the expected correction that the mass overdensity around the quasar implies for measurements of the ionizing radiation background from the line-of-sight proximity effect.Comment: 24 pages, 6 figures, published in JCA