Mathematical modelling of pulverized coal furnaces

The goal of this paper is to show how mathematics and computational science can help to design not only the geometry but also the operation conditions of different parts of a pulverized coal power plant

Lesiones por humedad. Revisión de conocimientos

Incontinence-associated dermatitis, a clinical manifestation of moisture-associated skin damage, is a condition characterized by irritation and inflammation, and is a common consideration in patients with fecal and/or urinary incontinence. Due to the location and appearance of “moisture lesions”, they are often mistaken for pressure ulcers.Objective: To perform a literature review about the term “moisture lesions”.Methods: We conducted a search of data through the metasearch Gerion Andalusian Public Health System. The term used for search centered on the concept: "moisture lesions". Data extraction was performed by a single person. We identified and analyzed 18 articles in which the term “moisture lesions” is treated.Results and conclusions: Differential diagnosis, usually based on visual examination, can help determine whether incontinence-associated dermatitis or a pressure ulcer is present.Treatment goals include protection of the skin from further exposure to irritants and establishment of a healing environment.This review of literature underscores the scant amount of evidence-based information available and highlights the need for further studies. This should encourage nurses to pay closer attention to moisture lesions and its assessment and treatment.La dermatitis asociada a la incontinencia, una manifestación clínica de lesiones de la piel asociadas a la humedad, es un estado caracterizado por irritación e inflamación, y es una consideración común en pacientes con incontinencia urinaria y/o fecal. Debido a la localización y apariencia de estas “lesiones por humedad”, a menudo se confunden con las úlceras por presión.Objetivo: Llevar a cabo una revisión bibliográfica acerca del término “lesiones por humedad”.Método: Se realizó una búsqueda de datos mediante el metabuscador Gerion del Sistema Sanitario Público de Andalucía. El término empleado para la búsqueda fue el concepto "lesiones por humedad" en inglés (“moisture lesions”). La recolección de datos fue realizada por una sola persona. Se identificaron y analizaron 18 artículos en los que se trata el concepto “lesiones por humedad”.Resultados y conclusiones: El diagnostico diferencial, usualmente basado en el examen visual, puede ayudar a determinar si está presente una úlcera por presión o una lesión por humedad. Los objetivos del tratamiento incluyen proteger la piel de un daño adicional por la exposición a irritantes y establecer un ambiente orientado a la curación.Esta revisión de la literatura subraya la escasa cantidad de información basada en la evidencia disponible y destaca la necesidad de realizar más estudios.Esto debería alentar a las enfermeras a prestar más atención a las lesiones por humedad y a su evaluación y tratamiento.

Examining the ability of CMIP6 models to reproduce the upwelling SST imprint in the Eastern boundary upwelling systems

Knowing future changes in the sea surface temperature (SST) is of vital importance since they can affect marine ecosystems, especially in areas of high productivity such as the Eastern Boundary Upwelling Systems (EBUS). In this sense, it is key to have fine resolution models to study the SST patterns as close as possible to the coast where the upwelling influence is greater. Thus, the main objective of the present work is to assess the ability of 23 General Circulation Models (GCMs) from phase six of the Coupled Model Intercomparison Project (CMIP6) in reproducing the upwelling SST imprint in the EBUS through a comparison with the Optimum Interpolation of Sea Surface Temperature (OISST ¼) database of the National Oceanic and Atmospheric Administration for the common period of 1982–2014. The results have shown that most of the CMIP6 GCMs overestimate nearshore SST for all the EBUS with the exception of Canary. Overall, the models with better resolution showed lower Normalized Root Mean Squared Error (NRMSE) and Normalized Bias (NBias), although the ability of the models is dependent on the study area. Thus, the most suitable models for each EBUS are the CNRM-HR, GFDL-CM4, HadGEM-MM, CMCC-VHR4, and EC-Earth3P for Canary; CESM1-HR, CMCC-VHR4, ECMWF-HR, and HadGEM-HM for Humboldt; and HadGEM-HH and HadGEM-HM for California. In the case of Benguela, no model adequately reproduces the SST imprint under the conditions established in the present study.Xunta de Galicia | Ref. ED431C 2021/44Xunta de Galicia | Ref. ED481B-2021-108European Union | Ref. MAR-02.01.01-FEAMP-0022European Union | Ref. PRTR-C17.I1Fundação para a Ciência e Tecnologia | Ref. UIDP/50017/2020Fundação para a Ciência e Tecnologia | Ref. UIDB/50017/2020Portugal 2020 | Ref. MAR-02.01.01-FEAMP-002

Projected changes in the season of hot days in the Middle East and North Africa

Financiado para publicación en acceso aberto: Universidade de Vigo/CISUGThe present study analyses changes in the timing and duration of the hot days season over the Middle East and North Africa region from 1970 to 2099 using model simulations of 11 regional models from the Coordinated Regional Climate Downscaling Experiment under the RCP8.5 scenario. In general, a non-symmetrical lengthening of the hot days season is projected, with a tendency to extend more into spring than into autumn. By the end of the century and the RCP8.5 scenario, Western Africa and the Persian Gulf display a hot days season starting 60 days earlier than in the historical period (1970–1999) (May vs. July, respectively). Southernmost latitudes are the most affected by a later retreat of the hot days season, of up to 60 days with respect to the historical period (October vs. August). The length of the extreme season is projected to increase between 100 and 120 days for the southernmost latitudes and the Persian Gulf resulting in nearly four more months with hot days conditions.Comisión Europea | Ref. INTERREG‐POCTEP 2014‐2020Comisión Europea | Ref. 0034‐RISC_ML_6_EXunta de Galicia | Ref. ED431C 2017/6

STEMbach Experiences at Higher Education

This work was performed in the scope of the “STEM is inspiring future careers” project (2021-1-ES01-KA220-SCH-000031524), Erasmus + Program.[Abstract]: The aim of this work is to describe several experiences of STEMbach in different areas: engineering, economics, materials, etc. The STEMbach is a program carried out by high school students during their two years of study to obtain their High School Diploma (equivalent to A-levels), designed for both the Humanities and Sciences modalities, and created alongside the Galician strategy for digital education. It encourages the vocation of the scholars towards scientific and technological research and allows a connection directly with the college education. The STEM works explained in this work were developed between the University of A Coruña and several high schools located in the region of Galicia (North-West of Spain). Results were very constructive for promoting STEM careers

Measurement of the cosmic ray spectrum above 4×10184{\times}10^{18} eV using inclined events detected with the Pierre Auger Observatory

A measurement of the cosmic-ray spectrum for energies exceeding $4{\times}10^{18}$ eV is presented, which is based on the analysis of showers with zenith angles greater than $60^{\circ}$ detected with the Pierre Auger Observatory between 1 January 2004 and 31 December 2013. The measured spectrum confirms a flux suppression at the highest energies. Above $5.3{\times}10^{18}$ eV, the "ankle", the flux can be described by a power law $E^{-\gamma}$ with index $\gamma=2.70 \pm 0.02 \,\text{(stat)} \pm 0.1\,\text{(sys)}$ followed by a smooth suppression region. For the energy ($E_\text{s}$) at which the spectral flux has fallen to one-half of its extrapolated value in the absence of suppression, we find $E_\text{s}=(5.12\pm0.25\,\text{(stat)}^{+1.0}_{-1.2}\,\text{(sys)}){\times}10^{19}$ eV.Comment: Replaced with published version. Added journal reference and DO

Energy Estimation of Cosmic Rays with the Engineering Radio Array of the Pierre Auger Observatory

The Auger Engineering Radio Array (AERA) is part of the Pierre Auger Observatory and is used to detect the radio emission of cosmic-ray air showers. These observations are compared to the data of the surface detector stations of the Observatory, which provide well-calibrated information on the cosmic-ray energies and arrival directions. The response of the radio stations in the 30 to 80 MHz regime has been thoroughly calibrated to enable the reconstruction of the incoming electric field. For the latter, the energy deposit per area is determined from the radio pulses at each observer position and is interpolated using a two-dimensional function that takes into account signal asymmetries due to interference between the geomagnetic and charge-excess emission components. The spatial integral over the signal distribution gives a direct measurement of the energy transferred from the primary cosmic ray into radio emission in the AERA frequency range. We measure 15.8 MeV of radiation energy for a 1 EeV air shower arriving perpendicularly to the geomagnetic field. This radiation energy -- corrected for geometrical effects -- is used as a cosmic-ray energy estimator. Performing an absolute energy calibration against the surface-detector information, we observe that this radio-energy estimator scales quadratically with the cosmic-ray energy as expected for coherent emission. We find an energy resolution of the radio reconstruction of 22% for the data set and 17% for a high-quality subset containing only events with at least five radio stations with signal.Comment: Replaced with published version. Added journal reference and DO