208 research outputs found

    Magnetic domains on magnetite islands: from XMCD-PEEM to micromagnetism

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    Oral presentation given at the 13th European Conference on Surface Crystallography and Dynamics, held in Donostia-San Sebastián, Spain, on June 19-21th, 2017.Magnetite nanostructures and thin films have been grown in spintronic devices such as spin valves in order to take advantage of the high Curie temperature, stability, and predicted half-metal character. However, thin films present magnetic properties which are rather different from the properties of bulk magnetite: high coercive fields, high saturation fields, out-of-plane magnetization, superparamagnetism in ultrathin films, or unexpected easy-axes. An explanation for these effects are growth defects, among which antiphase domain boundaries (APBs) are the best example. In the present work, we study the magnetic domains on flat single-crystal magnetite and other mixed spinels grown on Ru(0001) by molecular beam epitaxy [1,2]. As each island grows from a single nucleus, there are expected to be free of APBs. We have measured with nanometer-resolution the 3D magnetization of the islands by combining x-ray magnetic circular dichroism images acquired in a photoemission electron microscope at different azimuthal angles. The 3D magnetization maps have been used as the initial magnetization configuration for micromagnetic simulations of islands with the same lateral and vertical dimensions as the experimental ones. The Mumax3 software has been used to perform the micromagnetic simulations. By comparing the evolution of the micromagnetic simulations with the experimental behavior of the islands after annealing, we seek to validate the material parameters that define their magnetic behavior and to identify cases where defects or other effects play a role

    Resultados de la reparación quirúrgica Del ligamento deltoideo en las fracturas equivalentes bimaleolares

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    ObjetivoEl objetivo de este estudio es evaluar los resultados de la reparación quirúrgica del ligamento deltoideo en fracturas equivalente bimaleolares.Material y métodoEntre 2002 y 2009 fueron intervenidos 49 pacientes con fractura del maléolo peroneo y signos clásicos de lesión del ligamento deltoideo; finalmente se recuperaron para la revisión 44 pacientes. Se dividieron en 2 grupos: grupo A con 33 casos, en los que se reparó el ligamento deltoideo, y grupo B con 11 casos, donde el deltoideo fue tratado conservadoramente. Las fracturas fueron clasificadas según Lauge-Hansen y la AO/OTA. Para la valoración clínico-funcional se usó la escala de la American Orthopaedic Foot and Ankle Society (AOFAS) para el tobillo. Se registraron las complicaciones y reintervenciones.ResultadosTras un seguimiento medio de 12 meses, se obtuvo un resultado satisfactorio en ambos grupos, con una puntuación media final de 95 puntos en el grupo A y una de 94 en el grupo B, según la escala AOFAS. Hubo 2 infecciones, 1 intolerancia de la sutura medial, 1 algodistrofia y 4 casos precisaron retirada de material.ConclusionesNuestros resultados sugieren que la lesión del ligamento deltoideo puede ser reparada con buenos resultados funcionales. Y entendemos que, aunque los signos clásicos nos ayudan a sospechar la lesión, no son predictores fiables de la necesidad de reparación del lado medial.PurposeThe purpose of this study is to evaluate the result of surgical repair of deltoid ligament in fracture of the distal fibula upper or at the syndesmotic level.Materials and methodsBetween 2002 and 2009, 49 patients with distal fibula fractures and classical signs of deltoid ligament incompetence were operated, 44 were available for follow-up. Two groups: group A included 33 cases in whom deltoid ligament was treated by surgical repair, and group B, 11 cases who were treated conservatively. All fractures were classified according to Lauge-Hansen and AO/OTA. The AOFAS ankle score was used for clinical and functional evaluation. Complications and reinterventions were recorded.ResultsAt a mean follow-up of 12 months, a satisfactory functional result was obtained in both groups, with a mean final score of 95 points in group A and 94 in group B on the AOFAS scale. There were 2 infection, a medial suture intolerance, an algodystrophy and 4 hardware removed.ConclusionsOur findings suggest that a ruptured deltoid ligament can be repair with goods functional result. And we understand that although the classical signs help us to suspect a torn ligament, are not reliable predictors for surgical revision of the medial side

    SmartEx: a case study on user profiling and adaptation in exhibition booths

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    An investigation into user profiling and adaptation with exhibition booth as a case study is reported. First a review of the field of exhibitions and trade fairs and a summary introduction to adaptation and profiling are given. We then introduce three criteria for the evaluation of exhibition booth: effectiveness, efficiency and affect. Effectiveness is related the amount of information collected, efficiency is a measurement of the time taken to collect the information, and affect is the perception of the experience and the mood booth visitors have during and after their visit. We have selected these criteria to assess adaptive and profiled exhibition booths, we call smart exhibition (SmartEx). The assessment is performed with an experiment with three test conditions (non-profiled/non adaptive, profiled/non-adaptive and profiled adaptive presentations). Results of the experiment are presented along discussion. While there is significant improvements of effectiveness and efficiency between the two-first test conditions, the improvement is not significant for the last test condition, for reasons explained. As for the affect, the results show that it has an under-estimated importance in people minds and that it should be addressed more carefully

    Integración de nuevas soluciones plásticas con propiedades antioxidantes en sistemas de irrigación destinados a la reutilización de agua en agricultura de precisión. Póster

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    El uso cada vez más frecuente de aguas de alta actividad biológica, como son las aguas procedentes de depuradoras municipales, agudizan los problemas de obstrucción del emisor, lo cual conlleva para el agricultor situaciones complejas que pueden generar proliferación microbiana con reducción en la uniformidad del riego y por ende una disminución de la producción agrícola. Desde hace años, la aplicación de nuevas tecnologías en el sector agrícola está dirigida a conseguir mayor producción trabajando con mayor precisión y control con los sistemas utilizados en riego. El desarrollo en otros sectores, como el industrial, de nuevas tecnologías puede servir como impulso en la velocidad de incorporación a la agricultura de estas soluciones. La introducción en el sector agrícola de nuevos materiales con funcionalidades antimicrobianas contrastadas puede convertirse en una línea estratégica para el desarrollo de barreras de protección frente a la obstrucción de los sistemas de irrigación sometidos a trabajar con aguas de mala calidad. Se plantea una metodología basada en el testeo comparativo de diferentes materiales que transformados en emisores serán evaluados en la evolución del caudal emitido con agua regenerada. Una vez determinada la validez de la metodología se plantea la discriminación de los eventos necesarios para asegurar el mantenimiento de la instalación, para lo cual, se requiere continuar con el testado de los materiales

    RITA: a 1U multi-sensor Earth observation payload for the AlainSat-1

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    The Remote sensing and Interference detector with radiomeTry and vegetation Analysis (RITA) is one of the Remote Sensing payloads selected as winners of the 2nd GRSS Student Grand Challenge in 2019, to fly on board of the 3U AlainSat-1. This CubeSat is being developed by the National Space Science and Technology Center (NSSTC), United Arab Emirates University. RITA has been designed as an academic mission, which brings together students from different backgrounds in a joint effort to apply very distinct sensors in an Earth Observation mission, fusing their results to obtain higher-accuracy measurements. The main payload used in RITA is a Total Power Radiometer such as the one on board the FSSCat mission. With these radiometric measurements, soil moisture and ice thickness will be obtained. To better characterize the extensive Radio-Frequency Interferences received by EO satellites in protected bands, several RFI Detection and Classification algorithms will be included to generate a worldwide map of RFI. As a novel addition to the 3Cat family of satellites and payloads, a hyper-spectral camera with 25 bands ranging from 600 to 975 nm will be used to obtain several indexes related to vegetation. By linking these measurements with the soil moisture obtained from the MWR, pixel downscaling can be attempted. Finally, a custom- developed LoRa transceiver will be included to provide a multi-level approach to in-situ sensors: On-demand executions of the other payloads will be able to be triggered from ground sensors if necessary, as well as simple reception of other measurements that will complement the ones obtained on the satellite. The antennas for both the MWR and the LoRa experiments have been developed in-house, and will span the entirety of one of the 3U sides of the satellite. In this work, the latest development advances will be presented, together with an updated system overview and information about the operations that will be conducted. Results obtained from the test campaign are also presented in the conference

    Early to mid-Holocene spatiotemporal vegetation changes and tsunami impact in a paradigmatic coastal transitional system (Doñana National Park, southwestern Europe)

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    Ministry of Economy and Competitiveness, Spanish National Park Autonomous Organism, Ministry of Natural, Rural and Marine Environment and Fundación Sénec

    EL TRASTORNO LÍMITE DE PERSONALIDAD: LA FILOSOFÍA DIALÉCTICA COMO BASE DE LA INTERACCIÓN ENFERMERO PACIENTE

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    Borderline personality disorder was defined in the nineteenth century as the boundary between psychosis and neurosis. It has three major clinical components: a shaky sense of self, a high level of impulsivity and high affective instability. Due in part to the lack of knowledge of the underlying dynamics, working with patients with BPD is often difficult for nursing staff. The present study aims to propose guidelines that encourage interactive psychotherapy in the care of patients with this disorder. To this objective we conducted a bibliographic search in Nursing and other health science databases (Cochrane, Tripdatabase, Medline, CINAHL and care), using Mesh descriptors: "Borderline personality disorder" AND "therapy" and “Borderline Personality" AND "nursing cares", indexed from 01/01/2000, finally selecting a total of 17 studies for their relevance and relationship to the subject under study. Based on the results, we suggest the use of dialectical philosophy, the basis of dialectical-behavioral therapy developed by Marsha Linehan, a tool that will lead to a better nurse-patient relationship, greater adherence to treatment and greater efficiency in managing time and resources. El trastorno límite de personalidad fue definido ya en el siglo XIX, como límite entre la psicosis y la neurosis. Presenta tres componentes clínicos principales: un inestable sentido del yo, un alto nivel de impulsividad y una elevada inestabilidad afectiva . Debido en parte, a la falta de conocimiento de la dinámica subyacente, el trabajo con pacientes con TLP resulta a menudo difícil para el personal de Enfermería.El presente estudio tiene por objeto proponer orientaciones psicoterapéuticas que favorezcan la interacción en el cuidado de pacientes con este trastorno. Para este fin se lleva a cabo una búsqueda bibliográfica en las principales basos de datos de Enfermería y del resto de ciencias de la salud (Cochrane, Tripdatabase, Medline, CINAHL y CUIDEN), empleando los descriptores Mesh: “Borderline personality disorder” AND “therapy” y“Borderline personality” AND “nursing cares”, indexados a partir del 01/01/2000, seleccionando finalmente un total de 17 estudios por su relevancia y relación con el tema.Atendiendo a los resultados obtenidos, proponemos el empleo de la filosofía dialéctica, base de la terapia dialéctico-comportamental desarrollada por Marsha Linehan, como herramienta que va a conducir a una mejor relación enfermero-paciente, una mayor adherencia al tratamiento y una mayor eficiencia en la gestión de tiempo y recursos

    Plataforma de supervisión y control de riego localizado en cultivos leñosos

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    La interpretación de sensores de humedad y la automatización del riego permiten una gestión rápida del cultivo, manteniendo unas condiciones óptimas en la zona de las raíces garantizando un adecuado crecimiento del mismo. Este trabajo trata de exponer como poner en valor las herramientas de digitalización en un cultivo leñoso regado por goteo, tomando como ejemplo el mandarino. Para ello se ha diseñado una plataforma web que permite recoger, visualizar y tomar decisiones. En concreto, gracias a la plataforma web se puede ver el comportamiento de diferentes sondas de humedad de tipo capacitivo, así como hacer un seguimiento de las lecturas de riego aplicado. Los resultados muestran que a pesar de que las sondas muestren variabilidad entre ellas, debido a sus características inherentes o propiedades del terreno en que se instalan, lo interesante es su respuesta frente al riego o un evento meteorológico y su tendencia a largo plazo. Además, se observó que durante el periodo de tiempo evaluado el caudal apenas experimentó variaciones respecto al valor teórico (0.96% en riego superficial y 0.926% en riego subterráneo). Finalmente, gracias al conocimiento adquirido en esta instalación, se pondrá poner en práctica en otros cultivos
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