Search

Póster presentado a la XXX Astronomical Data Analysis Software and Systems Conference, celebrada online del 8 al 12 de noviembre de 2020 en la University of Maryland, College Park Campus, USA., [Aims]: to detect and to reconstruct the pulses that X-ray photons produce at TES (Transition Edge Sensor) detectors (like the one in the Athena/X-IFU instrument), using Deep Learning techniques. The dataset used contains simulations performed with the Athena official simulator SIXTE., [Methods]: We construct and train a Convolution Neural Network (CNN) to differentiate between single, double and triple pulses. We use a hyper-parameter bayesian optimization to select the optimal CNN architecture., [Results]: we present the results of our CNN classification over 15,000 simulated pulses achieving excellent performance metrics., AHEAD (Integrated Activities for the High Energy Astrophysics Domain).

Trabajo presentado al Exploring the Hot and Energetic Universe: The second scientific conference dedicated to the Athena X-ray observatory, celebrado del 24 al 27 de septiembre de 2018 en Palermo (Italy)., SIRENA is the software aimed at performing the on board event energy triggering and reconstruction for the Athena calorimeter X-IFU in the Event Processor (EP) of the Digital Readouts Electronics (DRE) unit. After demodulation (DRE-DEMUX) and hardware trigger stages, SIRENA implements different detection and reconstruction algorithms to provide arrival time, spatial location and energy of each event., This work has been funded by the Spanish Ministry MINECO under project ESP2016-76683-C3-1-R, co-funded by FEDER funds.

Trabajo presentado a la XXVII Astronomical Data Analysis Software and Systems Conference, celebrada del 22 al 26 de octubre de 2017 en Santiago de Chile, Chile., The X-ray Observatory Athena (Nandra et al. 2013) was proposed in April 2014 as the mission to implement the science theme "The Hot and Energetic Universe" selected by ESA for L2 (the second Large-class mission in ESA’s Cosmic Vision science programme). One of the two X-ray detectors designed to be onboard Athena is the X-IFU (Barret et al. 2016), a cryogenic microcalorimeter based on Transition Edge Sensor (TES) technology that will provide spatially resolved high-resolution spectroscopy. X-IFU will be developed by an international consortium led by IRAP (PI), SRON (co-PI) and IAPS/INAF (co-PI) and involving ESA Member States, Japan and the United States., The X-ray photons absorbed in X-IFU generate intensity pulses that must be detected and reconstructed on-board to recover their energy, position and arrival time. The software prototype package (SIRENA 1) in development as an anticipated contribution of IFCA/Spain to X-IFU through the Digital Readout Electronics (DRE) unit (Ravera et al. 2014), is currently testing a set of processing algorithms with the aim of finding the best compromise between performance and availability of on-board computing resources., The optimal filtering has recently been chosen as the baseline algorithm but other techniques are still under study in an effort to get the better results at the lower computing cost. In particular at IFCA, we are currently investigating the performance of the Extreme Learning Machine (ELM) algorithm for single-hidden layer feedforward neural networks (SLFNs) for the reconstruction of the pulses in the X-IFU data signal., This work has been funded by the Spanish Ministry MINECO under project ESP2014-53672-C3-1-P, co-funded by FEDER funds.

Objetivos: estimar el porcentaje de pacientes con EPOC adiestrados en la consulta para el manejo de inhaladores en la provincia de León. Métodos: estudio epidemiológico, transversal, multicéntrico (30 centros de salud de la provincia de León). Incluyó pacientes mayores de 35 años diagnosticados y tratados de EPOC. Variables a estudio: edad, sexo, hábitat, datos antropométricos, estado nutricional, tabaquismo, espirometría postboroncodilatadora, disnea (mMRC), reagudizaciones, gravedad (Índice Bodex), hospitalizaciones, tratamiento, seguimiento y caracterización del fenotipo (GesEOPC 2014). Los resultados se expresan con sus IC al 95,5%. Resultados: se incluyeron 833 pacientes, el 85,8% varones, con edad media de 64,69 (53,66-75,61) años y 20,65 (4,47-36,8) años evolución de la EPOC. Empleaban 1,88 (1,64-2,16) dispositivos inhaladores de media, p = 0,006, (57% de forma correcta, 23% regular y el 20% incorrecta). El 20,9% no recibieron adiestramiento para usar inhaladores frente al 79,1% adiestrados, p < 0,001, (9,4% por neumólogos, 20,3% enfermeras y 43,5% médicos familia, p = 0,002). Los pacientes bien adiestrados realizan mejor el tratamiento, en el 60,60% (58,91-62,29), p = 0,002. No hubo diferencias significativas en el adiestramiento por tabaquismo, gravedad, ingresos hospitalarios, ni calidad de vida, obteniendo una reducción significativa del número de agudizaciones, siendo de 1,59 (1,12-2,15) reagudizaciones medias en el grupo adiestrado frente a 3,29 (2,50-4,11) en los no adiestrados, p = 0,002. Conclusiones: el nivel de adiestramiento en el uso de inhaladores en los pacientes con EPOC es insuficiente en nuestro medio. La mejor formación de los profesionales y la simplificación de los dispositivos contribuirán a que un mayor número de pacientes realicen el tratamiento de forma adecuada.

Introducción y objetivos: El tabaco es la principal causa de enfermedad pulmonar obstructiva crónica (EPOC). El objetivo de este estudio es estimar la prevalencia del tabaquismo y analizar cómo se diagnostican y se trata a los fumadores diagnosticados de EPOC. Métodos: estudio epidemiológico, transversal, multicéntrico (30 centros salud de la provincia de León). Incluyó pacientes mayores de 35 años diagnosticados y tratados de EPOC. Variables analizadas: edad, sexo, hábitat, datos antropométricos, tabaquismo, número de paquetes/año, cooximetría, dependencia (escala analógico-visual), motivación (test de Fagerström), autoeficacia, estado anímico, intentos previos, terapia cognitivo-conductual, tratamiento farmacológico (TSN, bupropión, vareniclina) y recaídas. Los resultados se expresan con sus IC al 95,5%. Resultados: se incluyó a 833 pacientes, el 85,8% varones, edad media: 64,69 (53,66-75,61) años y 20,65 (4,47-36,8) años de evolución de la EPOC. El 86,67% (80,30-93,30) tenían antecedentes de tabaquismo (n = 722), de 35,26 (17,87-52,64) años de evolución, con consumo medio 28,36 (9,60-46,86) paquetes año, p < 0,001, siendo el 58% fumadores severos. El 57,4% (53,90-60,60) son exfumadores. El 29,3% (26,40-32,70) fumadores activos declarados vs. 35,11% (33,90-37,12) fumadores diagnosticados por cooximetría p < 0,05. Los 288 fumadores activos, presentaban baja motivación (49,80%), alta dependencia (49,5%), actitud negativa (52,60%), bajo estado de ánimo (32,05%), con 2,72 (1,74-3,67) intentos para dejar de fumar, p < 0,0001. La terapia conductivo-conductual (TCC) combinado con tratamiento farmacológico se realizó en el 55,8% (52,2-54,9), p < 0,05; La intervención más efectiva fue TCC combinada con vareniclina logrando una abstinencia del 29,86%. En total dejaron de fumar un 51,05% (49,49-52,70) de los pacientes con EPOC, p < 0,001. Conclusiones: la prevalencia de tabaquismo en la EPOC en nuestro medio continúa siendo inadmisiblemente elevada. Es necesaria una mayor implicación para disminuir su impacto en la salud de estos pacientes.

Póster presentado a la XXV Astronomical Data Analysis Software and Systems Conference, celebrada en Sydney, Australia del 25 al 30 de octubre de 2015., SIRENA is the software aimed at performing the on board event energy reconstruction for the Athena calorimeter X-IFU. This on board processing will be done in the X-IFU Digital Readout Electronics (DRE) unit and it will consist in an initial triggering of event pulses followed by an analysis (with the SIRENA package) to determine the energy content of such events., This work has been funded by the Spanish Ministries MICINN and MINECO under projects ESP2006-13608-C02-01, AYA2009-08059, AYA2010-21490-C02-01, AYA2012-39767-C02-01,ESP2013-48637-C2-1-P,ESP2014-53672-C3-1-P.

Trabajo presentado a la Conferencia: Exploring the Hot and Energetic Universe: The first scientific conference dedicated to the Athena X-ray observatory; celebrada en Madrid (España) del 8 a 10 de septiembre de 2015.-- et al., We are using end-to-end simulations to quantify the bright source capabilities of the Athena WFI and X-IFU instrument. For this purpose source images and spectra are used as input to fully simulate the predicted events on the detector, which are then converted to event lists, spectra, and images. This contribution will explain the different pile-up effects for both instruments and analyse their impact on the efficiency of the detector and the spectral shape. With this approach we are able to estimate limiting fluxes, below which spectra are not significantly affected by pile-up effects. Additionally, the direct impact of pile-up on estimated parameters for core science cases such as measuring the spin of black holes or absorption by the WHIM is investigated., This work has been funded by the Bundesministerium für Wirtschaft und Energie under Deutsches Zentrum für Luft- und Raumfahrt grant 50 QR 1402.

Trabajo presentado a la Conferencia: Exploring the Hot and Energetic Universe: The first scientific conference dedicated to the Athena X-ray observatory; celebrada en Madrid (España) del 8 a 10 de septiembre de 2015., This contribution describes the status and technical details of the SIRENA package, the software currently in development to perform the on board event energy reconstruction for the Athena calorimeter X-IFU. This on board processing will be done in the X-IFU DRE unit and it will consist in an initial triggering of event pulses followed by an analysis (with the SIRENA package) to determine the energy content of such events.The current algorithm used by SIRENA is the optimal filtering technique (also used by ASTRO-H processor) although some other algorithms are also being tested.Here we present these studies and some preliminary results about the energy resolution of the instrument based on simulations done with the SIXTE simulator (http://www.sternwarte.uni-erlangen.de/research/sixte/) in which SIRENA is integrated., This work has been funded by the Spanish Ministries MICINN and MINECO under projects ESP2006-13608-C02-01, AYA2009-08059, AYA2010-21490-C02-01, AYA2012-39767-C02-01, ESP2013-48637-C2-1-P, ESP2014-53672-C3-1-P.

Trabajo presentado a la Conferencia: Exploring the Hot and Energetic Universe: The first scientific conference dedicated to the Athena X-ray observatory; celebrada en Madrid (España) del 8 a 10 de septiembre de 2015.-- et al., The focal plane assembly of the Athena X-ray Integral Field Unit (X-IFU) includes as the baseline an array of ~4000 single size calorimeters based on Transition Edge Sensors (TES). Other sensor array configurations could however be considered, combining TES of different properties (e.g. size). In attempting to improve the X-IFU performance in terms of field of view, count rate performance, and even spectral resolution, two alternative TES array configurations to the baseline have been simulated, each combining a small and a large pixel array. With the X-IFU end-to-end simulator, a sub-sample of the Athena core science goals, selected by the X-IFU science team as potentially driving the optimal TES array configuration, has been simulated for the results to be scientifically assessed and compared. In this contribution, we will describe the simulation set-up for the various array configurations, and highlight some of the results of the test cases simulated.

Astronomical Data Analysis Software an Systems XXIV., The processing of the X-ray events detected by a TES (Transition Edge Sensor) device (such as the one that will be proposed in the ESA AO call for instruments for the Athena mission (Nandra et al. 2013) as a high spectral resolution instrument, XIFU (Barret et al. 2013)), is a several step procedure that starts with the detection of the current pulses in a noisy signal and ends up with their energy reconstruction. For this last stage, an energy calibration process is required to convert the pseudo energies measured in the detector to the real energies of the incoming photons, accounting for possible nonlinearity effects in the detector. We present the details of the energy calibration algorithm we implemented as the last part of the Event Processing software that we are developing for the X-IFU instrument, that permits the calculation of the calibration constants in an analytical way., This work has been funded by the Spanish Ministry of Science and Innovation (MICINN) and Spanish Ministry of Economy and Competitiveness (MINECO) under projects ESP2006-13608-C02-01, AYA2009-08059, AYA2010-21490-C02-01, AYA2012-39767-C02-01.

Las relaciones públicas han revolucionado el mundo empresarial con la aparición de la tecnología 2.0. y con fenómenos como las redes sociales y los blogs. Esta investigación analiza el uso de los medios sociales que hace el sector turístico, en concreto, las cadenas hoteleras de la Costa del Sol. En cada uno de los hoteles se han analizado y seguido los perfiles en las principales redes sociales: Facebook, Twitter, Linkedin, Flickr y Youtube; y el uso de blog (en caso de tenerlo). Destacan los perfiles en redes sociales de importantes cadenas nacionales presentes en la capital malagueña como AC, Room Mate, NH, Vincci o Meliá, y los blogs de cadenas como NH y hoteles como Monte Málaga, entre otros. Por su parte, en la lista de los medios sociales, el blog es uno de los más interesantes a la hora de comunicar ya que su formato permite extenderse más y presentar información más completa. Sin embargo, su uso no está muy extendido en el sector hotelero malagueño. Internet y las redes sociales han revolucionado el sector turístico y ese hecho es notable también en el sector hotelero presente en la Costa del Sol. La mayoría de empresas (cadena y hoteles) tienen presencia en medios sociales y están empezando a gestionar las posibilidades comunicativas que estos les ofrecen.

Póster presentado al X Scientific Meeting of the Spanish Astronomical Society (SEA), celebrado en Valencia del 9 al 13 de julio de 2012., The XMS (X-ray Microcalorimeter Spectrometer) is an instrument prototype with imaging capability in X-rays and high-spectral resolution. This instrument is a microcalorimeter based on transition edge sensors. As part of the Spanish contribution to the advancement of the XMS, we present the work carried out by the X-ray astronomy group at the Instituto de Física de Cantabria in collaboration with The Netherlands Institute for Space Research. The main work hereby presented includes the development and testing of software for this prototype with the purpose of instrument calibration and characterization, X-ray pulse detection and energy resolution calculations.