University of Extremadura
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ART. 43 Cesión de trabajadores. ART.44 Sucesión de empresa. ART.45 Causas y efectos de la suspensión. ART.46 Excedencias. ART.47 Suspensión del contrato o reducción de jornada por causas económicas, técnicas, organizativas o de producción derivadas de fuerza mayor. ART.47BIS Mecanismos RED de flexibilidad y estabilización del empleo. ART.48 Suspensión con reserva de puesto de trabajo. ART.48BIS Derecho individual de las personas trabajadoras, hombres o mujeres. ART.49 Extinción del contrato. ART.50 Extinción por voluntad del trabajador.
No full textCuadros sinópticos del Estatuto de los Trabajadores, en concreto, de los artículos: ART.44 sucesión de empresa. ART.45 Causas y efectos de la suspensión. ART.46 Excedencias. ART.47 Suspensión del contrato o reducción de jornada por causas económicas, técnicas, organizativas o de producción derivadas de fuerza mayor. ART.47BIS Mecanismos RED de flexibilidad y estabilización del empleo. ART.48 Suspensión con reserva de puesto de trabajo. ART.48BIS Derecho individual de las personas trabajadoras, hombres o mujeres. ART.49 Extinción del contrato. ART.50 Extinción por voluntad del trabajador
Novel Graphitic Oxynitrides as Photocatalysts for Sustainable H2 Production and CO2 Valorization. The Importance of Self-Assembly for Catalytic Activity
No full textThe field of carbocatalysis, often portrayed by paradigmatic graphitic carbonaceous structures, has become a booming topic tailored for multiple applications. To this end, a new metal-free carbocatalyst has been constructed from simple prebiotic monomers such as cyanamide and glyoxal. The resulting material shows an excellent performance as photocatalyst for H2 production and CO2 valorization, thus unveiling its real value to tackle sustainable goals. The unique oxygen-rich carbonaceous structure has been characterized in detail, which is consistent with a graphitic layered network. The described performance in two major societal concerns along with a facile preparation from C1/C2 platforms, makes this type of overlooked oxynitride carbocatalysts promising for real-life environmental endeavors.This research was funded by the Autonomous Government of Extremadura and the European Regional Development Fund (ERDF/FEDER) through Grant No. IB20042.peerReviewe
Crude protein as an indicator of pasture availability and quality: a validation of two complementary sensors
No full textThis study evaluated the possibility of using two complementary electronic sensors (rising plate meter (RPM) and active optical sensor (AOS)) to obtain a global indicator, pasture crude protein (CP) in kg ha⁻¹. This parameter simultaneously integrates two essential dimensions: pasture dry matter availability (dry matter (DM) in kg ha⁻¹) measured by RPM, and pasture quality (measured by AOS), and supports management decisions, particularly those related to the stocking rates, supplementation, or rotation of animals between grazing parks. The experimental work was carried out on a dryland biodiverse and representative pasture, and consisted of sensor measurements, followed by the collection of a total of 144 pasture samples, distributed between three dates of the pasture vegetative cycle of 2023/2024 (Autumn—December 2023; Winter—February 2024; and Spring—May 2024). These samples were subjected to laboratory reference analysis to determine DM and CP. Sensor measurements (compressed height (HRPM) in the case of RPM, and normalized difference vegetation index (NDVI) in the case of AOS) and the results of reference laboratory analysis were used to develop prediction models. The best correlations between CP (kg ha⁻¹) and “HRPM × NDVI” were obtained in the initial and intermediate phases of the cycle (autumn: R² = 0.86 and LCC = 0.80; and Winter; R² = 0.74 and LCC = 0.81). In the later phase of the cycle (spring), the accuracy of the forecasting model decreased dramatically (R² = 0.28 and LCC = 0.42), a trend that accompanies the decrease in the pasture moisture content (PMC) and CP. The results of this study show not only the importance of extending the database to other pasture types in order to enhance the process of feed supplement determination, but also the potential for the research and development of proximal and remote sensing tools to support pasture monitoring and animal production management.This work was funded by National Funds through FCT (Foundation for Science and Technology) under project UIDB/05183/2020. This work was also supported by project “SUMO—Sustentabilidade do Montado” (ref. PRR-C05-i03-I000066-LA 6.2).peerReviewe
Assessing effect of irrigation frequency on evaporation and transpiration in vineyards using SIMDualKc simulation model with measured wet fraction
No full textIrrigation efficiency is important for the environment and the economy. SIMDualKc has been effectively used to calculate evaporation and transpiration separately in vineyards for different irrigation strategies, but not to analyze the impact of irrigation frequency. This study was conducted for the in-field adjustment of the soil wetted fraction (“wf”) with a time domain reflectometry (TDR) sensor as a function of different irrigation frequency treatments (T03, T07, and T15 with irrigation every 3, 7, and 15 days, respectively). Evaporation and transpiration values were estimated separately with the SIMDualKc model for different irrigation frequencies with the adjusted “wf”, comparing them with vineyard field measurements and analyzing the effect of different irrigation frequencies on vineyard yield. The wf in T15 was higher than that in T07, which in turn was higher than that in T03. SIMDualKc indicates the most unfavorable treatment to be the T07, with higher evaporation and lower transpiration than T15 and T03, while T15 had higher evaporation and lower transpiration than T03. Although stomatic conductance also indicates the most unfavorable case to be T07, no clear differences were found between T03 and T15. No statistically significant differences were obtained in yield. The results indicate that the differences observed between irrigation frequencies are not reflected in yield but do show up in water use efficiency.This research was funded by Project PID2019-105039RR-C41/MCIN/AEI /10.13039/501100011033 and the AGROS 2022 project, subsidized by the Regional Government of Extremadura cofinanced by the ERDF, and the Ministry of Universities of Spain for University Professorship Training (FPU20/07314).peerReviewe
Maintenance challenges in maritime environments and the impact on urban mobility: Machico Stayed Bridge
No full textEste artículo investiga los desafíos de mantener el puente atirantado de Machico en un entorno marino, centrándose en sus implicaciones para la movilidad urbana. El principal problema abordado es el impacto de las duras condiciones marinas en la integridad estructural del puente, lo que plantea importantes desafíos para el mantenimiento y la seguridad continuos. La investigación destaca aspectos únicos como los efectos de la exposición al agua salada en los materiales y la interacción entre la infraestructura y la dinámica del tránsito urbano. Al enfatizar estos temas críticos, este estudio tiene como objetivo proporcionar información sobre estrategias de mantenimiento efectivas y contribuir al discurso más amplio sobre la movilidad urbana en las regiones costeras.This article investigates the challenges of maintaining the Machico Cable-Stayed Bridge in a marine environment, focusing on its implications for urban mobility. The primary problem addressed is the impact of harsh marine conditions on the structural integrity of the bridge, which poses significant challenges for ongoing maintenance and safety. The research highlights unique aspects such as the effects of saltwater exposure on materials and the interplay between infrastructure and urban transit dynamics. By emphasizing these critical issues, this study aims to provide insights into effective maintenance strategies and contribute to the broader discourse on urban mobility in coastal regions.This research was funded by Machico City Council and the Consejería de Economía, Ciencia y Agenda Digital from Junta de Extremadura, and by the European Regional Development Fund of the European Union through the reference grants GR21135.peerReviewe
Disadvantages and challenges in applied linguistics research in the framework of open science
No full textIn this chapter, we will address the issue of OS (Open Science) in ALr (Applied Linguistics research) as a common area of work for different specializations in the Humanities (e.g., Compared language studies, Classic Philologies, and Spanish Philology, among others). The chief reason is that, in our university, we share a research institute with other Humanities specializations, all with common interests in ALr. Thus, the LINGLAP center (described below) at University of Extremadura, Spain, was created.peerReviewe
A spectral theorem for a non-Archimedean valued field whose residue field is formally real
No full textIn this paper, we will prove a spectral theorem for self-adjoint compactoid operators. Also, we will study the condition on which the coefficient field must be imposed. In order to get the theorems, we will use the Fredholm theory for compactoid operators. Moreover, the property of maximal complete field is important for our study. These facts will allow us to find that the spectral theorem depends only on the residue class field, and is independent of the valuation group of the coefficient field. As a result, we can settle the problem of the spectral theorem in the case where the residue class field is formally real.This work was supported by JST, the establishment of university fellowships towards the creation of science technology innovation, Grant Number JPMJFS2102.peerReviewe
Educación para el futuro y ciudadanía democrática en la Educación Primaria
No full textEsta comunicación presenta los resultados de una investigación en la que analizamos las representaciones sociales sobre el futuro de los niños y las niñas de Educación Primaria, a partir de una serie de actividades sobre aspectos personales y sociales. Lo anterior se concretó en un dossier de actividades en el que se les preguntó: «¿cómo te sientes al pensar en el futuro?», «cuándo seas mayor, ¿cómo crees que será tu pueblo o ciudad?», «¿cómo crees que será el futuro?». Los resultados que se presentan en este trabajo corresponden a respuestas a estas tres preguntas del dossier. Este análisis corresponde a la primera fase de la recolección de los datos y, por lo tanto, es de carácter exploratorio, para el que se aplicó estadística descriptiva. Los hallazgos muestran que las imágenes del futuro, que tienen los y las estudiantes en general, son esperadas con un sentimiento positivo, son fundamentalmente tecnológicas y, a nivel personal, consideran que será mejor para ellos y ellas. Estas respuestas deben ayudarnos a reflexionar sobre la educación para formar una ciudadanía más responsable, crítica y divergente y, en última instancia, para construir cultura democrática.Este capítulo es resultado del proyecto «Educación para el futuro y esperanza en la democracia. Repensar la enseñanza de las ciencias sociales en tiempos de cambio (EpF+ED) (PID2019-107383RB-100)», proyecto financiado por el Ministerio de Ciencia e Innovación. Investigador principal: Dr. Antoni Santisteban Fernández (Universitat Autònoma de Barcelona).peerReviewe
Álgebra lineal y aplicaciones.
No full textEl presente manual es la 2ª edición del primero publicado en 2020 por el Servicio de Publicaciones de la UEx. Esta obra es un texto de referencia del curso de Álgebra Lineal I del Grado en Química de la UEx. Esta asignatura es obligatoria en los grados de Biología, Estadística, Física, Química, Matemáticas, etc., de la Facultad de Ciencias. Tiene también muchos contenidos comunes con Matemáticas I de Ingeniería Industrial.
El autor ha procurado escribir un texto apropiado para todas ellas, de modo que el estudiante o profesor pueda escoger o resaltar aquellas partes que considere más convenientes. Así, un estudiante de matemáticas dará más importancia a las demostraciones, a la coherencia y desarrollo de la teoría y un estudiante de ingeniería a las aplicaciones.
El manual está divido en cuatro temas. En cada tema se incluye una lista de problemas (con sus soluciones), prácticas de cálculos con ordenador y la biografía de un matemático relevante (en inglés).peerReviewe
Environmental noise pollution and sources
No full textPre-production version of a chapter published in: Nanotechnology to Monitor, Remedy, and Prevent Pollution (pp. 99-121). Elsevier. https://doi.org/10.1016/B978-0-443-15660-1.00030-7. The final version is Elsevier's copyright.Environmental noise is a pollutant agent with a significant impact on the health and wellbeing of people and wildlife. Means of transport are the sources of noise to which the population is most exposed, with road traffic being the main sound source. Noise pollution is often associated with air pollution due to emissions from transportation. Other sources of noise such as industrial, construction, leisure and urban waste collection activities also generate annoyance and sleep disturbances, although to a lesser extent. In order to design and plan effective mitigation measures, it is essential to have an independent knowledge of both the impact of each noise source and the different physical mechanisms through which each source generates noise. Reducing the number of people exposed to adverse noise levels is a priority objective for many countries.This work is part of the R&D&I project PID2020-114199RA-I00, funded by MCIN/AEI/10.13039/501100011033