904 research outputs found
Optimal Scheduling of Energy Storage Using A New Priority-Based Smart Grid Control Method
This paper presents a method to optimally use an energy storage system (such as a battery)
on a microgrid with load and photovoltaic generation. The purpose of the method is to employ the
photovoltaic generation and energy storage systems to reduce the main grid bill, which includes
an energy cost and a power peak cost. The method predicts the loads and generation power of
each day, and then searches for an optimal storage behavior plan for the energy storage system
according to these predictions. However, this plan is not followed in an open-loop control structure
as in previous publications, but provided to a real-time decision algorithm, which also considers
real power measures. This algorithm considers a series of device priorities in addition to the storage
plan, which makes it robust enough to comply with unpredicted situations. The whole proposed
method is implemented on a real-hardware test bench, with its different steps being distributed
between a personal computer and a programmable logic controller according to their time scale.
When compared to a different state-of-the-art method, the proposed method is concluded to better
adjust the energy storage system usage to the photovoltaic generation and general consumption.Unión Europea ID 100205Unión Europea ID 26937
Tertiary of Central System basins
The rise of the Central System due to reactivation of late
Hercynian fault systems during the Alpine Orogeny directly affected
the strcture and stratigraphic framework of the basins nearby
that were being filled al the same time. The sedimentary record is the
essential key to understanding the tectonic and palaeo-morphological history, of the Central Range, and vice-versa. Relating the filling
of the basins with the definition of the mountain range, pre-arkosic,
arkosic and post-arkosic stages have been proposed. However, it is
difficult to support the previous idea that the arkosic stage continued
throughout the Late Tertiary to finish in Middle Pliocene.:
times withe the deposition of the Paramos(limestone). The arkoscs
of the Central System arc of Eocene-Oligocce age and the highest
alluvial fan deposits may be of Aragonian age. There is only a poor
record of the remaining Tertiary and Quaternary sediments.
boeause of active river incision during this lime in the hasins, the
ranges and elsewhere in the Spanish Meseta
Alpine tectonic framework of south-western Duero basin
The tectonic activity in the south-western area of the
Spanish Northern Meseta (Ciudad Rodrigo and Duero basins)
during most of the Tertiary was determined by u transpressive
regime that reactivated Hercynian to Late-Hercynian faults. The
record of the Alpine Orogeny is complex because the sedimentary
record indicates a compresive regime in the sour e areas coeval
with the extensionall to transpresive regime indicated by normal or
strike-slip faults. This duality is due 10 the geotectonics position of
this area between two compressive areas, the Cantabrian Range
and the Central System, and the extensional Atlantic margin
North-western Cainozoic record: present knowledge and the correlation problem
Tertiary deposits of the north-western Iberian Peninsula
are heterogeneous because they occur in several morpho-structural
positions as isolated and dispersed basins and outerops. The quality
of the palaeontological record is usually very poor and there are
scarce data. Correlation depends on a wide range of criteria which
arc not always equivalent:
palaeontology,
mineralogy and petrology,
geomorphology, tectonics and comparison with better-known
and better-dated facies in regions nearby. The results lack
homogeneity and there arc notable discrepancie
Propiedades psicométricas de la versión espanola de la escala de motivación deportiva
This study aimed to analyse the psychometric properties of the Spanish version of the échelle de Motivation dans les Sports (EMS). The sample was made up of 496 athletes: 314 men and 182 women. The confirmatory factorial nalysis confirmed the scales seven-factor structure with method effects, the construct validity was supported by the correlations among the subscales. Furthermore, the results showed satisfactory levels of internal consistency and significant differences between genders were obtained in the end. These results support the use of the Spanish version of the SMS in assessing motivation within the context of sport
The Rosenberg Self-Esteem Scale: Translation and Validation in University Students
El propósito de esta investigación ha sido traducir al español y analizar las propiedades psicométricas de la escala de autoestima de Rosenberg (RSES) en una muestra de estudiantes universitarios. El análisis factorial confirmatorio confirmó que el modelo que mejor se ajusta a los datos tanto en la muestra total como en las submuestras de hombres y mujeres tiene una estructura unifactorial con efectos de método en los ítems formulados en positivo. Los resultados indican correlaciones positivas y fuertes entre la autoestima y cinco dimensiones del autoconcepto. Además, la escala ha mostrado niveles satisfactorios de consistencia interna y estabilidad temporal tras un periodo de cuatro semanas. Finalmente, se han obtenido diferencias de género significativas. Estos resultados apoyan el uso de la RSES para evaluar la autoestima en el contexto educativo universitario.The aim of this study was to translate into Spanish and to validate the Rosenberg Self-Esteem Scale (RSES), completed by 420 university students. Confirmatory factor analysis revealed that the model that best fit the data, both in the total sample and in the male and female subsamples, was the one-factor structure with method effects associated with positively worded items. The results indicated high, positive correlations between self-esteem and the five dimensions of selfconcept. The scale showed satisfactory levels of internal consistency and temporal stability over a four-week period. Lastly, gender differences were obtained. These findings support the use of the RSES for the assessment of self-esteem in higher education
The building stone of the Roman city of Lixus (NW Morocco): provenance, petrography and petrophysical characterization
The characterization of building materials is a key tool to assess deterioration processes and improve potential restoration works of archaeological sites. The aim of this paper is to identify and characterize most important building stone used in the construction of the Roman city of Lixus (Larache, Morocco) by means of petrographic and petrophysical techniques. Based on the visual analysis of the monuments, three major building stones (i.e. lithotypes) have been identified: i) Oligocene sandstones, ii) Quaternary sandstones and iii) Quaternary conglomerates. Based on the analysis of the regional geology and exploitation marks, these three lithotypes have been recognised to crop out in the surroundings of Lixus and the quarries, presumably Roman in origin, recognized. The Oligocene sandstone is the primary building stone in Lixus as it forms and crops out extensively in the Tchemmis hill, at top of which the city is settled. The Quaternary sandstones and conglomerates, which represent nearshore deposits and eolianites, crop out along the Atlantic coast where they form part of the cliffs next to Larache. Petrographic results indicate that lithotypes differ notably in grain size, ratio of detrital to allochemical components, and the configuration of their porous system. Mechanical analysis show that the Oligocene sandstones are more resistant to compression than the Quaternary sandstones and conglomerates, the latter exhibiting relatively low compressive strength. The Oligocene sandstones, which display scarce porosity and permeability, show a hydric behaviour characterized by a very low degree of absorbing and desorbing water, likely resulting from a poor connectivity of the pore network. Contrary to the latter lithotype, the Quaternary sandstones, which exhibit very high porosity and permeability, display a hydric behaviour characterized by high degree of both absorbing and desorbing water. This is attributed to the low degree of cementation compared to porosity of this lithotype and the excellent connectivity of the porous network. Finally, the accelerated artificial aging test of the Oligocene and Quaternary sandstones do not show a significant weight loss after the accelerated artificial aging test, indicating that both are slightly affected by salt crystallization and presumably ice as well. Results indicate that the relatively fine state of conservation of the building rocks of Lixus is linked to intrinsic factors as mineralogy and petrophysical characteristics together with the favourable effect of the climatic condition of the study area.Peer ReviewedPostprint (published version
Gypsum mining spoil improves plant emergence and growth in soils polluted with potentially harmful elements
Purpose Soil pollution is a major problem worldwide.
Some anthropogenic activities, such as mining, may
exceed soil capacity, causing relevant health and ecosystem
hazards. The use of mineral amendments can
help reduce soil pollution. Gypsum mining spoil (GS)
is a waste material highly produced in gypsum mining
industry, which has never been used in soil remediation
despite its high potential as amendment of polluted
soils. In this study, we carried out an ex-situ experiment
to assess for the first time the capacity of GS to both
reduce the availability of Potentially Harmful Elements
(PHEs) in soils and promote seed emergence.
Methods Soils affected by residual pollution after
the Aznalcóllar mine spill were collected, treated with GS in three different proportions, and sown
with seeds of two non-genetically related species.
Seed emergence and biomass production were
monitored, and PHE content in soils and plants
were analysed.
Results We have observed a direct and very positive
relation between GS and both the reduction of PHE
availability and PHE uptake by plants, and the increase
of plant emergence and growth, especially with the
addition of the highest doses of the amendment.
Conclusion This study highlights the promising
results of GS as a novel soil amendment to be used
in the remediation of polluted soils and vegetation
recovery. Moreover, using GS as soil amendment
will bring the opportunity to sustainably manage this
waste material and reduce its social and environmental
impact parallelly to the mitigation of PHE hazards.KNAUF-GmbHMinistry of Science, Innovation and Universities RTI 2018-094327-B-I00Tatiana-Perez-de-Guzman-el-Bueno Foundation PhD grant Programme 201
Introducción a la estratigrafía del Terciario del SO de la Cuenca del Duero
Depto. de Geodinámica, Estratigrafía y PaleontologíaFac. de Ciencias GeológicasTRUEpu
Performance Evaluation of Neural Networks for Animal Behaviors Classification: Horse Gaits Case Study
The study and monitoring of wildlife has always been a subject of great
interest. Studying the behavior of wildlife animals is a very complex task due to
the difficulties to track them and classify their behaviors through the collected
sensory information. Novel technology allows designing low cost systems that
facilitate these tasks. There are currently some commercial solutions to this problem;
however, it is not possible to obtain a highly accurate classification due to the
lack of gathered information. In this work, we propose an animal behavior recognition,
classification and monitoring system based on a smart collar device provided
with inertial sensors and a feed-forward neural network or Multi-Layer Perceptron
(MLP) to classify the possible animal behavior based on the collected sensory
information. Experimental results over horse gaits case study show that the recognition
system achieves an accuracy of up to 95.6%.Junta de Andalucía P12-TIC-130
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