Tino el espantapájaros cuida el huerto: un recurso educativo para Educación Infantil

El entorno natural, cada vez más alejado de las ciudades, despierta en los niños y niñas interés y ofrece a los docentes, a través de los huertos escolares, una herramienta educativa fundamental. Al cultivar huertos escolares, estamos cultivando mentes conscientes y responsables que se preocupan por el futuro no solo de nuestro planeta, sino también por el de la propia humanidad. El presente Trabajo de Fin de Grado tiene como objeto de estudio los beneficios de la educación a través de los huertos escolares. Se realiza así, en primer lugar, un análisis teórico para ofrecer después una propuesta didáctica con actividades que permitan introducir y trabajar correctamente esta temática de la manera más adecuada posible en el aula.The natural environment, increasingly distant from cities, awakens children's interest and offers teachers, through school gardens, a fundamental educational tool. By cultivating school gardens, we are cultivating conscious and responsible minds that care about the future not only of our planet, also of humanity itself. The aim of this Final Degree Project is to study the benefits of education through school gardens. Firstly, a theoretical analysis is carried out in order to offer then a didactic proposal with activities that allow this subject to be introduced and worked on correctly in classroom in the most appropriate way possible.Grado en Educación Infanti

Escuela y ecología, dos herramientas clave para un futuro sostenible

Uno de los grandes retos a los que la humanidad se enfrenta es el cambio climático. Debe haber un cambio de mentalidad, actitudes y valores que debe impulsarse desde las escuelas. La educación ha de ser la herramienta principal con la que atajar este problema de raíz, proporcionando a los jóvenes la formación necesaria para entender la necesidad de medidas políticas y acciones individuales respecto al cambio climático que estamos viviendo. El presente Trabajo de Fin de Grado tiene como objeto de estudio el planteamiento de la Ecología en la Educación española. Se realiza así, en primer lugar, un análisis teórico para ofrecer después una propuesta didáctica con actividades que permitan introducir y trabajar correctamente esta temática de la manera más adecuada posible en el aulaGrado en Educación Primari

Possible Mechanisms of Action of Two Pseudomonas fluorescens Isolates as Probiotics on Saprolegniosis Control in Rainbow Trout (Oncorhynchus mykiss Walbaum)

© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).[EN] Probiotics have been proposed as one of the alternatives to the chemical treatments currently used in aquaculture. Recently, the possible usefulness of certain microorganisms, mainly bacteria, has been highlighted as a potential biocontrol for saprolegniosis. In the present work we investigated the possible mechanisms of action of two isolates of Pseudomonas fluorescens (LE89 and LE141) with proven ability to reduce Saprolegnia parasitica infection in rainbow trout under experimental conditions when they are added to the tank water. The stimulation of the innate immune response and the production of siderophores and bioactive substances inhibiting S. parasitica present in cells and supernatants of LE89 and LE141 were studied. Regarding the immune response the only noteworthy points were the increase in the phagocytic activity of macrophages and the concentration of serum proteins when LE141 was administered. Both bacteria produced siderophores. When analyzing the protein substances present in supernatants, it was observed that in both isolates the proteins with inhibitory activity present might be siderophores. In LE141, besides siderophores, a protein of 66 kDa was identified in the fraction responsible for inhibition. To sum up, the two P. fluorescens isolates might be usable for biocontrol of saprolegniosis and that the mode of action of these bacteria is likely to be related to the production of siderophores.SIThis research was funded by “Ministerio de Ciencia e Innovación” (AGL2010-18562) and co-financed through the European Regional Development Fund (ERDF). C.G.P. was awarded a predoctoral contract by the “Consejería de Educación” of the regional government “Junta de Castilla y León”, co-financed through the European Social Fund.The authors are grateful for the technical assistance provided by Gloria Fernández-Bayón, Leandro Rodríguez Aparicio, and Maria Camino López Fierro of the University of León. The fish farm Los Leoneses, in León, supplied the rainbow trout

Performance Evaluation of a VLC Transmitter Based on the Split of the Power

IEEE Applied Power Electronics Conference and Exposition, San Antonio, (Estados Unidos de Norteamérica), marzo de 2018Visible Light Communication (VLC) has gained relevance during last years. It consists in using High-Brightness LEDs (HB-LEDs) both for lighting and for transmitting information changing the light intensity rapidly. However, there are some bottlenecks that are slowing down the deployment of this technology. One of the most important problems is that the HB-LED drivers proposed for addressing high data rates in VLC achieve poor power efficiency. Since these HB-LED drivers must be able to reproduce fast current waveforms, the use of Linear Power Amplifiers (LPAs) has been adopted, which clearly damage the power efficiency of HB-LED lighting. In order to alleviate this problem, a HB-LED driver made up of two DC-DC power converters is presented in this work. One of them is responsible for performing the communication functionality by operating at high switching frequency (10 MHz), whereas the second one fulfills the illumination functionality by ensuring a certain biasing point. The split of the power allows to minimize the power delivered by the fast-response DC-DC power converter. Thus, the efficiency can be maximized for scenarios with changing conditions (i.e., mobile transmitter and/or receiver, presence of mobile obstacles, etc.). In this sense, how the lighting level and the communication signal power affect both the power efficiency and the communication efficiency is deeply analyzed. The implemented prototype achieves an overall efficiency around 90%. In addition, the proposed VLC transmitter is able to reproduce a wide range of digital modulation schemes, including Orthogonal Frequency Division Multiplexing (OFDM

Artificial Intelligence for a Fair, Just, and Equitable World

From the 1970s onward, we started to dream of the leisure society in which, thanks to technological progress and consequent increase in productivity, working hours would be minimized and we would all live in abundance. We all could devote our time almost exclusively to personal relationships, contact with nature, sciences, the arts, playful activities, and so on. Today, this utopia seems more unattainable than it did then. Since the 21st century, we have seen inequalities increasingly accentuated: of the increase in wealth in the United States between 2006 and 2018, adjusted for inflation and population growth, more than 87% went to the richest 10% of the population, and the poorest 50% lost wealth [1] . Following the crisis of 2008, social inequalities, rights violations, planetary degradation, and the climate emergency worsened and increased (see [2] ). In 2019, the world's 2153 billionaires had more wealth than 4.6 billion people [3] . The World Bank estimates that COVID-19 will push up to 150 million people into extreme poverty [4]

In memorian del ilustre entomólogo danés Johann Christian Fabricius (7-I-1745* / 3-III-1808†) en el bicentenario de su fallecimiento

Aspectos relevantes de la vida y obra del entomólogo danés Johann Christian Fabricius 1745-180

Carl von Linné :tres siglos de un polifacético naturalista

Perfil biográfico del naturalista sueco Carl von Linné o Carlos Linneo en su traducción española, con motivo del tercer centenario de su nacimiento, celebrado el 23 de mayo de 200

Mixed germ cell-stromal testicular neoplasia in a crucian carp (Carassius carassius L.): a case report

p. 114-119This report documents a case of spontaneously occurring gonadal neoplasm in a crucian carp (Carassius carassius L.) caught in the wild. On the basis of the histopathological findings, the neoplasm was diagnosed as a mixed germ cell-stromal testicular neoplasia (gonadoblastoma).S