Proceedings of the 2nd Iberian Nuclear Astrophysics Meeting on Compact Stars

This volume contains most of the links to the presentations delivered at this international workshop. This meeting was the second in the series following the previous I Encuentro Ib\'erico de Compstar, held at the University of Coimbra, Portugal in 2010. The main purpose of this meeting was to strengthen the scientific collaboration between the participants of the Iberian and the rest of the southern European branches of the European Nuclear Astrophysics network, formerly, COMPSTAR. This ESF (European Science Foundation) supported network has been crucial in helping to make a broader audience for the the most interesting and relevant research lines being developed currently in Nuclear Astrophysics, especially related to the physics of neutron stars. The program of the meeting was tailored to theoretical descriptions of the physics of neutron stars although some input from experimental observers and other condensed matter and optics areas of interest was also included.Comment: Journal of Physics: Conference Series Volume 342 (2012), Proceedings of the 2nd Iberian Nuclear Astrophysics Meeting on Compact Stars, 22-23 September 2011, Salamanca-Spain. Editors, M. A. Perez-Garcia, J. Pons and C. Albertus Editor

Anisotropic thermal emission from magnetized neutron stars

The thermal emission from isolated neutron stars is not well understood. The X-ray spectrum is very close to a blackbody but there is a systematic optical excess flux with respect to the extrapolation to low energy of the best blackbody fit. This fact, in combination with the observed pulsations in the X-ray flux, can be explained by anisotropies in the surface temperature distribution.We study the thermal emission from neutron stars with strong magnetic fields in order to explain the origin of the anisotropy. We find (numerically) stationary solutions in axial symmetry of the heat transportequations in the neutron star crust and the condensed envelope. The anisotropy in the conductivity tensor is included consistently. The presence of magnetic fields of the expected strength leads to anisotropy in the surface temperature. Models with toroidal components similar to or larger than the poloidal field reproduce qualitatively the observed spectral properties and variability of isolated neutron stars. Our models also predict spectral features at energies between 0.2 and 0.6 keV.Comment: 18 pages, 19 figures, version accepted for publication in A&

Ankle sprain versus muscle strain injury in professional men's basketball: a 9-year prospective follow-up study

Peer ReviewedPostprint (author's final draft

Bollera identitatetik subjektu politikoaren egituraketara. Hego Euskal Herriko bollera taldeen diskurtso eta praktiketara bidaia

Ikerketa hau Hego Euskal Herrian lesbianismo politikoa bollera identitatearen bitartez nola egituratzen den aztertzeko saiakera da. Zaurgarritasuna erresistentzia politikorako tresna den ideiatik abiatuta, subjektu politikoaren ulerkera desberdinek militantzia bizitzeko forman eragina dutela planteatzera doa lan honek. Hala, elkarrizketatutako bollera taldeek Euskal Herriko Mugimendu Feministarekin dituzten adostasunak eta adostasunik ezak mahai gainean jarriko dira, bai eta bollera identitatek formula binomikoen kontra egiteko duen potentzialitatea, besteak beste

Bollera identitatetik subjektu politikoaren egituraketara. Hego Euskal Herriko bollera taldeen diskurtso eta praktiketara bidaia

Ikerketa hau Hego Euskal Herrian lesbianismo politikoa bollera identitatearen bitartez nola egituratzen den aztertzeko saiakera da. Zaurgarritasuna erresistentzia politikorako tresna den ideiatik abiatuta, subjektu politikoaren ulerkera desberdinek militantzia bizitzeko forman eragina dutela planteatzera doa lan honek. Hala, elkarrizketatutako bollera taldeek Euskal Herriko Mugimendu Feministarekin dituzten adostasunak eta adostasunik ezak mahai gainean jarriko dira, bai eta bollera identitatek formula binomikoen kontra egiteko duen potentzialitatea, besteak beste

Toward condition monitoring of damper windings in synchronous motors via EMD analysis

(c) 2012 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.[EN] Failures in damper windings of synchronous machines operating in real facilities have been recently reported by several authors and companies. These windings are crucial elements of synchronous motors and generators, playing an important role in the asynchronous startup of these machines as well as in their stability during load transients. However, the diagnosis of failures in such elements has barely been studied in the literature. This paper presents a method to diagnose the condition of damper bars in synchronous motors. It is based on the capture of the stator current of the machine during a direct startup and its further analysis in order to track the characteristic transient evolution of a particular fault-related component in the time-frequency map. The fact that the damper only carries significant current during the startup and little or no current, when the machine operates in steady state, makes this transient-based approach specially suited for the detection of such failure. The Hilbert-Huang transform (based on the empirical mode decomposition method) is proposed as a signal-processing tool. Simulation and experimental results on laboratory synchronous machines prove the validity of the approach for condition monitoring of such windings. © 2012 IEEE.This work was supported by the Spanish Ministerio de Ciencia e Innovacion (MICINN) in the framework of the VI Plan Nacional de Investigacion Cientifica, Desarrollo e Innovacion Tecnologica 2008-2011. (Programa Nacional de proyectos de Investigacion Fundamental, project reference DPI2011-23740). Paper no. TEC-00443-2011.Antonino-Daviu, J.; Riera-Guasp, M.; Pons Llinares, J.; Roger-Folch, J.; Perez, R.; Charlton-Perez, C. (2012). Toward condition monitoring of damper windings in synchronous motors via EMD analysis. IEEE Transactions on Energy Conversion. 27(2):432-439. https://doi.org/10.1109/TEC.2012.2190292S43243927

Mixed monolayer of DPPC and lysine-based cationic surfactants: An investigation into the antimicrobial activity

In this paper, we report studies which aim to elucidate the mechanisms involved in the antimicrobial activity of three cationic lysine-based surfactants: LLM, LALM, and C6 (LL)2. To this end, a simple membrane model (i.e., 1,2-dipalmitoyl-sn-phosphatidylcholine, DPPC) was used to explore the monolayer properties at the air/liquid interface. Compression π-A isotherms of mixtures of DPPC/lysine surfactants at different pH showed an expansion of the DPPC monolayer, suggesting cationic lysine surfactant/DPPC interactions, which strongly depend on surfactant structure and hydrophobic interactions. Antimicrobial activity of the three surfactants has also been assessed with transmission electron microscopy, observing the effects on Staphylococcus aureus and Escherichia coli. The three surfactants caused various kinds of damage to the bacteria tested, such as structural alterations, leakage of internal material, and cell destruction.Authors have been supported by the CICYT Spanish Research Agency under the projects CTQ2009-14151-C02-01 and CTQ2010-14897 and by AGAUR Research Agency of the Generalitat de Catalunya under the project 2009 SRG 246Peer reviewe

Detection of Broken Rotor Bars in Nonlinear Startups of Inverter-Fed Induction Motors

[EN] Fault detection in induction motors powered by inverters operating in nonstationary regimes remains a challenge. The trajectory in the time-frequency plane of harmonics related to broken rotor bar develops very in proximity to the path described by the fundamental component. In addition, their energy is much lower than the amplitude of the first harmonic. These two characteristics make it challenging to observe them. The Dragon Transform (DT), here presented, is developed to overcome the described problem. In this article, the DT is assessed with nonlinear inverter-fed startups, where its high time and frequency resolutions facilitate the monitoring of fault harmonics even with highly adjacent trajectories to the first harmonic path.Fernández-Cavero, V.; Pons Llinares, J.; Duque-Perez, O.; Morinigo-Sotelo, D. (2021). Detection of Broken Rotor Bars in Nonlinear Startups of Inverter-Fed Induction Motors. IEEE Transactions on Industry Applications. 57(3):2559-2568. https://doi.org/10.1109/TIA.2021.30663172559256857

A comparison of techniques for fault detection in inverter-fed induction motors in transient regime

"(c) 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works."[EN] Fault detection in induction motors operating in non-stationary regimes has become a need in today's industry. Most of the works published deal with line-fed motors. Nevertheless, the number of inverterfed induction motors has significantly increased in recent years. Therefore, several fault detection techniques have been proposed lately for this type of motors, based mainly on an adequate input signal processing to obtain fault signatures in the time-frequency domain. In this paper, a comparison of time-frequency techniques applied to fault detection in inverter-fed induction motors in a transient state is presented. For that purpose, the techniques are applied to two current signals acquired from two induction motors with two types of faults: bar breakage and mixed eccentricity. The paper shows the particularities and special difficulties of diagnosing under this type of feeding, reviewing the works related to each technique. The strengths and weaknesses of these techniques are discussed with the goal of providing a criterion for its application in an industrial environment and guidance for future developments in this field.This work was supported in part by the Spanish Ministerio de Economia y Competitividad and in part by the FEDER program in the framework of the Proyectos I+D del Subprograma de Generacion de Conocimiento, Programa Estatal de Fomento de la Investigacion Cientifica y Tecnica de Excelencia under Grant DPI2014-52842-P.Fernandez-Cavero, V.; Morinigo-Sotelo, D.; Duque-Perez, O.; Pons Llinares, J. (2017). A comparison of techniques for fault detection in inverter-fed induction motors in transient regime. IEEE Access. 5:8048-8063. https://doi.org/10.1109/ACCESS.2017.2702643S80488063

Manifestaciones periodontales en gestantes del Hogar Materno “Vilma Espín” del policlínico 30 de Noviembre

 Objective: Clinical and epidemiological characterization of pregnant women with periodontal disease at the “Vilma Espín” Maternal Home, from the “30 de Noviembre” Teaching Polyclinic. Materials and methods: A descriptive and cross-sectional study was carried out in 47 pregnant women with periodontal manifestations in the "Vilma Espín Guillote" Maternity Home, belonging to the "30 de Noviembre" Teaching Polyclinic, in the city of Santiago de Cuba, in the period from June to December 2018, with the objective of identifying the periodontal status of pregnant women and characterizing said prioritized group with periodontal disease in terms of clinical and epidemiological characteristics. The Russell Periodontal Index was used to determine the severity of the periodontal disease and the Simplified Green and Vermillion Oral Hygiene Index to specify the degree of oral hygiene. Results: It was obtained that 38.2% of the pregnant women with gingival disease were in the third trimester of pregnancy. Mild gingivitis was the one that predominated with 65.9% also in the third trimester. In 95.7% of the cases it was located. Conclusions: pregnant women with gingival disease predominated in the third trimester of pregnancy. Mild gingivitis was found in a higher percentage. Poor oral hygiene was present in a high number of pregnant women, which increased with the severity of the disease and the low level of schooling.  Objetivo: Caracterización clínica y epidemiológica de las gestantes con enfermedad periodontal del Hogar Materno “Vilma Espín”, del Policlínico Docente “30 de noviembre”. Materiales y métodos: Se efectuó un estudio descriptivo y transversal en 47 embarazadas con manifestaciones periodontales en el Hogar Materno “Vilma Espín Guillote”, perteneciente al Policlínico Docente "30 de Noviembre", en la ciudad de Santiago de Cuba, en el período comprendido de junio a diciembre de 2018, con el objetivo de identificar el estado periodontal de las gestantes y caracterizar dicho grupo priorizado con enfermedad periodontal en cuanto a características clínicas y epidemiológicas. Se utilizó el Índice Periodontal de Russell para determinar la severidad de la enfermedad periodontal y el Índice de Higiene Bucal de Green y Vermillion simplificado para precisar el grado de higiene bucal. Resultados: Se obtuvo que 38.2% de las gestantes con enfermedad gingival se encontraban en el tercer trimestre de embarazo. La gingivitis leve fue la que predominó con un 65.9% también en el tercer trimestre. En 95.7% de los casos fue localizada. Conclusiones: Predominaron las gestantes con enfermedad gingival en el tercer trimestre del embarazo. La gingivitis leve se encontró en un mayor porcentaje. La higiene bucal deficiente se presentó en un elevado número de grávidas, el cual se incrementaba con la severidad de la enfermedad y el bajo nivel de escolaridad.