76 research outputs found
Aplicación de estrategias de aprendizaje innovadoras para generar comprensión en la asignatura de Filosofía en los estudiantes de 11mo grado del Colegio Público 14 de Septiembre de Managua
La presente investigación consistió en la aplicación de estrategias de aprendizaje innovadoras en el proceso de enseñanza aprendizaje, con las cuales se pretende generar comprensión en los estudiantes de undécimo grado en la asignatura de Filosofía en el Colegio Público 14 de Septiembre de la ciudad de Managua. Cabe destacar que esta asignatura es poca atractiva para los estudiantes debido al rol del docente tradicionalista y a la carencia de enfoque que se le da en relación al ámbito social. Este trabajo se apoya en el enfoque constructivista, resaltando que al incorporar nuevas estrategias se producen cambios significativos en las estructuras mentales, estos cambios son progresivos y ayudan al estudiante a estar motivados a aprender y relacionar situaciones de la vida diaria con los conceptos que ya poseen, permitiendo un aprendizaje a largo plazo, es decir lograr un aprendizaje en conjunto que los ayude a desarrollar un criterio personal teniendo una mejor perspectiva del ambiente social en el que se encuentren. También se trabajó con diversas teorías constructivistas, se habla de la comprensión, desarrollo de competencias, visión tripartita de los contenidos y las estrategias didácticas innovadoras (es decir nuevas o adecuadas a los contextos), todo esto con el fin de mejorar los modelos y prácticas de enseñanza actuales, aplicados a una unidad didáctica. En este proceso de intervención didáctica se utilizó diarios de campo y cámaras fotográficas para tener mayor valide
Groundwater quality assessment using data clustering based on hybrid Bayesian networks
Bayesian networks have become a standard in the field of Artificial Intelligence as a means of dealing with uncertainty and risk modelling. In recent years, there has been particular interest in the simultaneous use of continuous and discrete domains, obviating the need for discretization, using so-called hybrid Bayesian networks. In these hybrid environments, Mixtures of Truncated Exponentials (MTEs) provide a suitable solution for working without any restriction. The objective of this study is the assessment of groundwater quality through the design and application of a probabilistic clustering, based on hybrid Bayesian networks with MTEs. Firstly, the results obtained allows the differentiation of three groups of sampling points, indicating three different classes of groundwater quality. Secondly,
the probability that a sampling point belongs to each cluster allows the uncertainty in the clusters to be assessed,
as well as the risks associated in terms of water quality management. The methodology developed could be applied to other fields in environmental sciences
Connection between the Jurassic oceanic lithosphere of the Gulf of Cádiz and the Alboran slab imaged by Sp receiver functions
We investigate the lithospheric structure beneath the Gibraltar arc (western Mediterranean) using S-wave receiver functions (SRFs). From a dense network deployed in the Ibero-Maghrebian region during different seismic surveys, we calculated ~11,000 SRFs that sample the upper mantle detecting the lithosphere-asthenosphere boundary (LAB). The observed seismic LAB belongs to different lithospheric domains: Iberian and African forelands, Alboran domain, and Atlantic Ocean. Common conversion point (CCP) migrated profiles show the geometrical relation among them. Under the Strait of Gibraltar, we observe a deep LAB (~150 km). It can be associated with Jurassic-age lithosphere of ~120 km thickness, one of the thickest ever reported in oceanic environments. There is an abrupt offset between the oceanic LAB and the shallow (80-km-deep) continental LAB of the Iberian foreland, suggesting displacement along a former transform fault. The northwestern African continental LAB is 90–100 km deep. The oceanic LAB under the Gibraltar arc continues to ~180 km depth beneath the Alboran Sea, showing the connection between the Alboran slab and the oceanic lithosphere in the central Gulf of Cádiz. This geometry agrees with an ~200-km-wide corridor of oceanic lithosphere between the central Atlantic and the Alpine Tethys, developed during the Middle–Late Jurassic. Our results support the proposed westward rollback of an oceanic east-dipping slab, which has continuity at least to the central Gulf of Cádiz.This work was supported by the Spanish national projects CGL2015-67130-C2-2-R/FEDER and CGL2012-31472
The Role of Technology in Greenhouse Agriculture: Towards a Sustainable Intensification in Campo de Dalías (Almería, Spain)
Campo de Dalías, located in southeastern Spain, is the greatest European exponent of greenhouse agriculture. The development of this type of agriculture has led to an exponential economic development of one of the poorest areas of Spain, in a short period of time. Simultaneously, it has brought about a serious alteration of natural resources. This article will study the temporal evolution of changes in land use, and the exploitation of groundwater. Likewise, this study will delve into the technological development in greenhouses (irrigation techniques, new water resources, greenhouse structures or improvement in cultivation techniques) seeking a sustainable intensification of agriculture under plastic. This sustainable intensification also implies the conservation of existing natural areas
From ancient olice agroforestry systems to modern conventional and organic olive monocultures: historical evolution of greenhouse gas emissions
info:eu-repo/semantics/publishedVersio
Embodied energy in agricultural inputs. Incorporating a historical perspective
Este documento de trabajo analiza la energía asociada a los inputs agrarios en perspectiva histórica. El estudio se basa en una amplia revisión bibliográfica, que se ha complementado con estimaciones propias para crear una base de datos coherente que incluye toda la energía directa e indirecta asociada a los principales insumos agrícolas con el máximo nivel de desagregación posible. Estos insumos incluyen mano de obra, vectores energéticos como combustibles y electricidad, materiales, maquinaria, fertilizantes y pesticidas de síntesis, insumos orgánicos, material de propagación, insumos asociados al regadío, edificaciones, invernaderos, transporte y servicios no materiales. Para cada insumo se describe su evolución histórica desde la perspectiva energética, las metodologías más comúnmente empleadas en la literatura para el cálculo de su energía asociada, y se proporcionan series temporales sobre la evolución de esta energía. Las series temporales incluyen todo el siglo XX y la primera década del siglo XXI, y están expresadas en cortes decenales. Los valores ofrecidos son promedios globales o referidos a las principales regiones productoras. Los resultados muestran los grandes cambios que han ocurrido en la eficiencia energética de la producción de insumos agrícolas, subrayando la necesidad de emplear coeficientes dinámicos en el análisis energético de la evolución histórica de los sistemas agrícolas.This working paper analyzes the energy embodied in agricultural inputs from a historical perspective. The study is based on a wide literature review, which has been complemented with own estimations in order to create a coherent database including all direct and indirect energy associated to the main agricultural inputs with the maximum possible level of disaggregation. The inputs studied include human labour, energy carriers such as fuels and electricity, materials, machinery, synthetic fertilizers and pesticides, organic inputs, propagation material, irrigation inputs, buildings, greenhouses, transport and non-material services. For each input we describe its historical evolution from an energetic perspective, the most common methods used for the calculation of its embodied energy published in the literature and temporal data series on the historical evolution of this energy. The temporal data series are expressed in 10-year time-steps and, in the majority of cases, they cover the whole 20th century and the first decade of the 21st century. The values provided are global averages or covering the main producing regions. The results show the large changes that have occurred in the energy efficiency of the production of agricultural inputs, underlining the need for the use of dynamic coefficients in historical energy analyses of agricultural systems
Focal Mechanisms for Subcrustal Earthquakes Beneath the Gibraltar Arc
Earthquakes below 50‐km depth are usually associated with active
subduction, and the direction of faulting is aligned with the orientation of the subduction zone. Faulting
in 42 earthquakes beneath the Gibraltar Arc and Alboran Sea shows different characteristics. The most
abundant solutions show horizontal slip, in agreement with relative plate motion between Africa and
Europe. Further solutions are associated with shortening and suggest compression from the basal drag of the
Earth's mantle on the moving plates. In turn, no signature of active subduction was found. Images of the
Earth's interior from teleseismic waves suggest a relation between the earthquakes and a stalled remnant of
~150‐Ma‐old oceanic material that once formed the connection between two oceans and later has been
buried beneath the Gibraltar Arc.We received financial
support through Mineco/Feder Project
CGL2015‐67130‐C2‐2‐R and Junta de
Andalucía research group RNM 10
Preservation of the Iberian Tethys paleomargin beneath the eastern Betic mountain range
We are grateful to the staff involved in the TransCorBe project. The Geophysical Instrument Pool at GFZ-Potsdam provided most of the seismic equipment. We are grateful to Christian Haberland for his support. We want to thank two anonymous reviewers for the careful reading of the manuscript and the interesting and constructive criticism they provided. This work was funded by the Spanish State Research Agency (SRA) under the grant PID2019-109608GB I00/SRA/10.13039/501100011033, FEDER/MINECO project CGL2015-67130-C2-2-R, FEDER/Junta de Andalucia project A-RNM-421-UGR18 and research group RNM104 of the Junta de Andalucia. The Granada University/CBUA funding for open access charge.We obtain P-wave receiver functions from teleseismic earthquake recordings at a dense seismic broadband
transect, deployed along 170 km across the Betic mountain range in southeastern Spain.
Migrated images show the crustal structure of the orogen in detail. In particular, they reveal the situation
of the subducted Iberian paleomargin, with full preservation of the proximal domain and the 50 km
wide necking domain. Crustal thinning across the necking domain affects mainly the lower continental
crust. The Variscan crust of the Tethys margin is bending downward beneath the Betics, reaching
45 km depth, and terminates abruptly at a major slab tear. The distal domain of the paleomargin cannot
be reconstructed, but the migrated section suggests that material has been exhumed through the subduction
channel and integrated into the Betic orogen. This supports an origin of the HP-LT Nevado-Filabride
units from subducted, hyperextended Variscan crust. According to our profile, the present-day eastern
Betics appear to have a much more significant contribution from metamorphic Iberian crust than previously
thought.Geophysical Instrument Pool at GFZ-Potsdam - Spanish State Research Agency (SRA) PID2019-109608GB I00/SRA/10.13039/501100011033Spanish Government CGL2015-67130-C2-2-RFEDER/Junta de Andalucia project A-RNM-421-UGR18
RNM104Junta de Andaluci
Edible film based on candelilla wax to improve the shelf life and quality of avocado
In this study the effect of addition of ellagic acid (at three different concentrations) into candelilla wax matrix on shelf life and quality of whole avocados was studied. Control treatments were avocados coated with candelilla wax without ellagic acid and avocados without coating. The fruits were chosen for their maturity, size, free from infection and physical defects. All those samples were inoculated with a concentrated suspension of spores of Colletotrichum gloeosporioides, the main phytopathogenic fungus for avocados. Experiments were carried out completely divided into randomized groups. Changes in appearance, solids content, pH, aw, lightness (L* value) and weight loss were monitored during 6 weeks every 8 days. A sensory evaluation of avocados coated with the best edible film was also performed. Edibel films were able to reduce significantly the damage caused by C. gloeosporioides, reducing also significantly the change in appearance and weight loss in the fruits. Use of ellagic acid as part of the edible film has an important effect to improve the quality and shelf life of avocado. With this work we found that using this new protection system the negative effects of C. gloeosporioides can be successfully reduced
Applications of serum albumins in delivery systems: Differences in interfacial behaviour and interacting abilities with polysaccharides
One of the major applications of SerumAlbumins is their use as delivery systems for lipophilic compounds in biomedicine.
Their biomedical application is based on the similarity with Human Serum Albumin (HSA), as a fully
biocompatible protein. In general, Bovine Serum Albumin (BSA) is treated as comparable to its human homologue
and used as a model protein for fundamental studies since it is available in high amounts and well understood.
This protein can act as a carrier for lipophilic compounds or as protective shell in an emulsion-based
vehicle. Polysaccharides are generally included in these formulations in order to increase the stability and/or applicability
of the carrier. In this review, themain biomedical applications of Albumins as drug delivery systems are
first presented. Secondly, the differences between BSA andHSA are highlighted, exploring the similarities and differences
between these proteins and their interaction with polysaccharides, both in solution and adsorbed at interfaces.
Finally, the use of Albumins as emulsifiers for emulsion-based delivery systems, concretely as Liquid
Lipid Nanocapsules (LLNs), is revised and discussed in terms of the differences encountered in the molecular
structure and in the interfacial properties. The specific case of Hyaluronic Acid is considered as a promising additivewith
important applications in biomedicine. The literatureworks are thoroughly discussed highlighting similarities
and differences between BSA and HSA and their interaction with polysaccharides encountered at
different structural levels, hence providing routes to control the optimal design of delivery systems.This work has been funded by the following projects, which are
gratefully acknowledged: MAT2017-82182-R and RTI2018-101309-BC21
(Ministerio de Ciencia e Innovación). The authors also acknowledge
“Mancomunidad de los Pueblos de la Alpujarra Granadina” for the funds
raised and supplied for this research
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