A 2.5D BEM-FEM using a spectral approach to study scattered waves in fluid–solid interaction problems

42nd International Conference on Boundary Elements and other Mesh Reduction Methods, BEM/MRM 2019; ITeCons-University of Coimbra, Coimbra; Portugal; 2 July 2019 through 4 July 2019. - Publicado en WIT Transactions on Engineering Sciences, Volume 126, 2019, Pages 111-123This work presents a two-and-a-half dimensional (2.5D) spectral formulation based on the finite element method (FEM) and the boundary element method (BEM) to study wave propagation in acoustic and elastic waveguides. The analysis involved superposing two dimensional (2D) problems with different longitudinal wavenumbers. A spectral finite element (SFEM) is proposed to represent waveguides in solids with arbitrary cross-section. Moreover, the BEM is extended to its spectral formulation (SBEM) to study unbounded fluid media and acoustic enclosures. Both approaches use Lagrange polynomials as element shape functions at the Legendre–Gauss–Lobatto (LGL) points. The fluid and solid subdomains are coupled by applying the appropriate boundary conditions at the limiting interface. The proposed method is verified by means of a benchmark problem regarding the scattering of waves by an elastic inclusion. The convergence and the computational effort are evaluated for different h-p strategies. Numerical results show good agreement with the reference solution. Finally, the proposed method is used to study the pressure field generated by an array of elastic fluid-filled scatterers immersed in an acoustic mediumMinisterio de Economía y Competitividad BIA2016-75042-C2-1-

Aplicación de control de movimientos y recopilación de datos de contexto para un robot móvil.

En la actualidad la electrónica está en completo auge. Las posibilidades que ofrece el correcto uso de ciertos microcontroladores y sus módulos abre las puertas al desarrollo de cualquier sistema que se pueda imaginar. A modo de puesta en práctica de los conocimientos adquiridos a lo largo de la carrera y con la intención de reunirlos todos bajo un mismo proyecto, se propone llevar a cabo un robot de reconocimiento de entorno controlado remotamente. Aunque este proyecto tenga un fin méramente educativo, no deja de ser un desarrollo completo que no queda lejos de cualquier robot comercial. Consistirá en un vehículo robot basado Raspberry Pi y Python mediante el cual se tomarán distintos datos del entorno a través varios periféricos. A lo largo del proyecto se estudiarán los aspectos teóricos necesarios, se diseñará y se realizará el montaje del sistema, se programará el código necesario para el microcontrolador Raspberry Pi y se realizarán una serie de tests que demuestren su correcto funcionamiento.Universidad de Sevilla. Grado en Ingeniería de las Tecnologías de Telecomunicació

Context-aware Assessment Using QR-codes

In this paper we present the implementation of a general mechanism to deliver tests based on mobile devices and matrix codes. The system is an extension of Siette, and has not been specifically developed for any subject matter. To evaluate the performance of the system and show some of its capabilities, we have developed a test for a second-year college course on Botany at the School of Forestry Engineering. Students were equipped with iPads and took an outdoor test on plant species identification. All students were able to take and complete the test in a reasonable time. Opinions expressed anonymously by the students in a survey about the usability of the system and the usefulness of the test were very favorable. We think that the application presented in this paper can broaden the applicability of automatic assessment techniques.The presentation of this work has been co-founded by the Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

ANALYSIS OF THE THERMAL BHEAVIOR OF CERAMIC SEMIMETALLIC AND ORGANIC BRAKE PADS AS A FUNCTION OF THE BRAKING DISTANCE UNDER THE ECE - 13H REGULATION

The aim of this research was to analyze the thermal behavior of organic, semi-metallic and ceramic brake pads as a function of the stopping distance according to international standards. The chemical formulation of each of them is identified by micrography. The experimentation is carried out from the selection of the vehicle of the categories M1, N1. It is based on statistics from the AEADE and the selection of marketable brake pads in the Ecuadorian market that comply with the INEN 2185 Regulation.  These  pads  are  subjected  to  braking tests, the procedure and the selection of the necessary parameters for the braking tests are based on the ECE 13 - H regulation, verifying the minimum standards that are detailed there. The data is collected by means of a pyrometer and stored for statistical analysis to determine the behavior of the temperature generated in the brake pads with the different treatments. A variation of 34.49 °C in the organic type, 48.64 °C in the semi-metallic type and 52.98 °C in the ceramic was obtained. To validate the experiment, a multiple comparison analysis is performed using ADEVA to the temperature and stopping distance data of the treatments. The result is a probability ≤ 0.0001 for the validation of the null hypothesis. Thus, the alternative hypothesis was affirmed, the data was reliable, and the study validated.  It  is  concluded that  ceramic-type pads offer better performance with a temperature of 78.92 °C when braking at a braking speed of 50 km/h and 127.56 °C at a braking speed of 100 km/h, it was obtained an efficient braking distance at different initial braking speeds. It is recommending the use of ceramic type pads that guarantee the safety of the vehicle occupants

Coping and depressive symptoms in family carers of dependent adults aged 18 and over: A systematic review and meta-analysis

Being a family carer is associated with increased risk of experiencing depressive symptoms. Despite many decades of research investigating the association between coping strategies and depressive symptoms in carers results across studies remain contradictory. The objective of this study was to systematically review evidence on the association between depressive symptoms and coping strategies in carers of dependent people aged 18 and over and investigate potential sources of heterogeneity of findings. The study design was a systematic review and meta-analysis. We searched Pubmed, CINAHL, PsycINFO and LILACS up to April 2021. We performed meta-analyses following the PRISMA statement and several subgroup analyses to investigate whether cause of caring dependency, study design, and controlling for several biases influenced results. Fifty-nine studies met our inclusion criteria. We found a robust and statistically significant association between greater use of dysfunctional coping and higher depressive symptoms. Greater use of emotion-focused coping was associated with fewer depressive symptoms only in studies controlling for confounding bias. Use of problem-focused coping was related to fewer depressive symptoms in carers of frail older people. The combined use of both problem-focused and emotion-focused coping was associated with lower symptoms of depression. Our review concludes that the broad domain of dysfunctional coping is consistently associated with higher levels of depressive symptoms in carers. After controlling for confounders, emotion-focused coping and several of its individual strategies were consistently associated with fewer depressive symptoms. Whilst problem-focused coping and some of its individual strategies are also associated with lower depressive symptoms, these strategies may not be as helpful in all caregiving groups.Clinical Impact Statement: fcBoth broad dimensions of coping and individual coping strategies are important correlates of depressive symptoms in family carers, and should be utilized in informing and improving the effectiveness of future caregiving interventions

Negative-epsilon conditions in the dispersive LiNbO3-Ag nanoparticles composites

The silver (Ag)-embedded lithium niobate (LiNbO3) composites are theoretically analyzed under the effective medium Maxwell-Garnett approximation to account on the optimal conditions through which such composites present negative epsilon conditions. The dielectric function of Ag nanoparticles (NPs) is described by Drude theory with an additional Lorentz oscillator term to take into account the interband electronic transitions which typically occur in noble metals. The LiNbO3 dielectric function is evaluated through the Sellmeier equations. Once the effective dielectric function (epsilon(eff)) is evaluated, we investigate the negative epsilon condition (epsilon'(eff) < 0) as a function of the frequency. The results showed that, for given volumen fraction values, the negative epsilon (NE) condition is satisfied for critical sizes of Ag NPs. This condition defines an interval of energies, called NE range. That NE range enlarges for increasing radius and becames narrower for decreasing volume fractions. Furthermore, the calculated Frohlich frequency is nearly close to the lower-energy limit of NE range. In addition, the calculated extinction spectra of the composite are analyzed in terms of the radius of Ag NPs.This work is partially supported by Spanish MINECO under grants MAT2013-46649-C4-4-P, MAT2015 71070 REDC and TECHNOFUSION (II)-Comunidad de Madrid: CM (52013/MAE-2745

Clustering subsecuencial de series de tiempo: Evidencia de patrones temporales en el tipo de cambio UsdMxn

Este trabajo es sobre Clustering SubSecuencial de Series de Tiempo, una técnica que busca agrupar subsecuencias contenidas dentro de una misma serie de tiempo, por medio del cálculo de un término de distancia euclidiana a manera de medida de similitud entre los datos. Hacemos uso del algoritmo MASS (Mueen's Algorithm for Similarity Search), para la identificación de patrones temporales en la subsecuencia de precios intradía del tipo de cambio Dólar americano Vs Peso Mexicano (UsdMxn). Una búsqueda quasi-exhaustiva de evidencia es conducida utilizando 10 años de información, 14.5 Millones de precios (OHLC de cada minuto), 36,000 mediciones de indicadores macroeconómicos. Los resultados que mostramos son consistentes y documentamos las condiciones bajo las cuales no se cumple la Hipótesis del Mercado Eficiente.ITESO, A.C

The contribution of microfluidics to the fight against tuberculosis

The high mortality associated with tuberculosis brings forward the urgency of developing new therapies and strategies against the disease. With the advance of drug-resistant strains, traditional techniques have proven insufficient to manage the disease appropriately. Microfluidic devices have characteristics that can enhance treatment prescription and significantly advance our knowledge about the disease and its interaction within the human body. In addition, microfluidic systems provide advantages in terms of time and costs, which are particularly important in countries with low income and resources. This review will highlight how microdevices can help bridge the gaps in disease management, including their use for drug testing and development, drug susceptibility, basic research, and novel approaches to anti-TB vaccines and organ-on-chip studies.This project has received funding from the Innovative Medicines Initiative 2 Joint Undertaking (JU) under grant agreement No. 853989. The JU receives support from the European Union's Horizon 2020 research and innovation programme and EFPIA and Global Alliance for TB Drug Development non-profit organisation, Bill & Melinda Gates Foundation and University of Dundee. This work was partially funded by Ministerio de Ciencia, Innovación y Universidades, Agencia Estatal de Investigación, under grant PID2019-109820RB-I00, MCIN/AEI/10.13039/501100011033/, co-finance by European Regional Development Fund (ERDF), "A way of making Europe

MODELOS DE INTERVENCIÓN EN LA CONDUCTA SUICIDA SEGÚN DIFERENTES PROFESIONALES SANITARIOS EN ESPAÑA: RESULTADOS DEL PROYECTO EUREGENAS

According to the WHO (World Health Organization) and the European Union, suicide is considered to be a health problem of prime importance and to be one of the principal causes of unnatural death. In Spain, the number of suicides has increased 12% since 2005 . The Research Project “European Regions Enforcing Actions against Suicide (EUREGENAS), funded by the Health Program 2008-2013, has as main objective the description of an integrated model of Mental Health orientated to the prevention of suicide. The differences that allow distinguishing the meaning of prevention in suicide behavior are described and explained through a qualitative methodological strategy and through the creation of discussion groups formed by different groups of health professionals. The results highlight the existing differences between the diverse health professionals who come more in contact with this problem and it shows as well the coincidence of meaning that suicide has to be considered as a priority in the field of health.Según la OMS y la Unión Europea, consideran el suicidio un problema de primer orden y una de las principales causas de muerte no natural. En España, la tasa ha aumentado un 12% desde 2005(1). El Proyecto de Investigación Euroepan Regions Enforcing Actions against Suicide (EUREGENAS) financiado por Health Progam 2008-2013, tiene como principal objetivo describir un modelo integrado de Salud Mental orientado a la prevención de suicidio. A través de una estrategia metodológica cualitativa y mediante la elaboración de grupos de discusión con distintos colectivos profesionales de la salud se describen e interpretan las diferencias que permiten discriminar el significado de la prevención de conductas suicidas. Los resultados ponen en evidencia las diferencias existentes entre los diferentes profesionales de la salud más relacionados con este problema y la coincidencia en considerar el suicidio como una prioridad en el ámbito de la salud.De acordo com a OMS e a União Europeia o suicídio é considerado um problema de primeira ordem e uma das principais causas de morte não natural. Em Espanha, a taxa aumentou 12% desde 2005 (INE, 20014). O projeto de investigação Regiões Europeias Promovendo Acções contra o Suicídio (EUREGENAS), financiado pelo Programa de Saúde 2007-2013, tem como objetivo principal promover um modelo integrado de saúde mental para prevenir o suicídio. Através de uma estratégia metodológica qualitativa e do desenvolvimento de grupos de discusão com diferentes profissionais de saúde, são descritas e interpretadas as diferenças que permitem identificar como discriminar o significado da prevenção de comportamentos suicidas. Os resultados evidenciam as diferenças entre os pontos de vista e práticas dos diferentes profissionais da saúde relacionados com este problema, e a ideia reconhecida em considerar o suicídio como uma prioridade no campo da saúde