1,485 research outputs found
Forecasting Recharging Demand to Integrate Electric Vehicle Fleets in Smart Grids
Electric vehicle fleets and smart grids are two growing technologies. These technologies
provided new possibilities to reduce pollution and increase energy efficiency.
In this sense, electric vehicles are used as mobile loads in the power grid. A distributed
charging prioritization methodology is proposed in this paper. The solution is based
on the concept of virtual power plants and the usage of evolutionary computation
algorithms. Additionally, the comparison of several evolutionary algorithms, genetic
algorithm, genetic algorithm with evolution control, particle swarm optimization, and
hybrid solution are shown in order to evaluate the proposed architecture. The proposed
solution is presented to prevent the overload of the power grid
Teaching Innovation in Order to Integrate Self-Learning and Self-Evaluation in the Webct Platform
El concepto de docencia universitaria tradicional se ha visto modificado por los principios
definidos en el Espacio Europeo de Educación Superior. Un cambio metodológico que motiva
el concepto de autoevaluación y promueve todas aquellas actividades académicas que
faciliten el autoaprendizaje. En este escenario, es fundamental que los estudiantes adquieran
nuevos hábitos autoformativos. Nuestro trabajo presenta un método de enseñanza-aprendizaje
para que ésta pase a ser más activa y participativa. Este proyecto permite al alumno
disponer de un conjunto de recursos, que favorecen la autoevaluación y autoformación, a la
vez que facilita su trabajo personal y en equipo.In the European Higher Education Area (EHEA) the traditional teaching university concept
has changed. EHEA has introduced a methodological change in order to motivate selfevaluation
and to promote self learning academic activities. In this way students must acquire
new self learning practices. Our work presents a method to make more active and participatory
the teaching-learning process. This project provides students different tools in order to promote
the self-learning and self-evaluation. A set of teaching resources are presented to facilitate
both individual and collective students' work
Monitoring and Fault Location Sensor Network for Underground Distribution Lines
One of the fundamental tasks of electric distribution utilities is guaranteeing a continuous
supply of electricity to their customers. The primary distribution network is a critical part of these
facilities because a fault in it could affect thousands of customers. However, the complexity of
this network has been increased with the irruption of distributed generation, typical in a Smart
Grid and which has significantly complicated some of the analyses, making it impossible to apply
traditional techniques. This problem is intensified in underground lines where access is limited. As a
possible solution, this paper proposes to make a deployment of a distributed sensor network along
the power lines. This network proposes taking advantage of its distributed character to support new
approaches of these analyses. In this sense, this paper describes the aquiculture of the proposed
network (adapted to the power grid) based on nodes that use power line communication and energy
harvesting techniques. In this sense, it also describes the implementation of a real prototype that
has been used in some experiments to validate this technological adaptation. Additionally, beyond
a simple use for monitoring, this paper also proposes the use of this approach to solve two typical
distribution system operator problems, such as: fault location and failure forecasting in power cables.Ministerio de Economía y Competitividad, Government of Spain project Sistema Inteligente Inalámbrico para Análisis y Monitorización de Líneas de Tensión Subterráneas en Smart Grids (SIIAM) TEC2013-40767-RMinisterio de Educación, Cultura y Deporte, Government of Spain, for the funding of the scholarship Formación de Profesorado Universitario 2016 (FPU 2016
Increasing the Efficiency of Rule-Based Expert Systems Applied on Heterogeneous Data Sources
Nowadays, the proliferation of heterogeneous data sources provided by different
research and innovation projects and initiatives is proliferating more and more and
presents huge opportunities. These developments create an increase in the number
of different data sources, which could be involved in the process of decisionmaking
for a specific purpose, but this huge heterogeneity makes this task difficult.
Traditionally, the expert systems try to integrate all information into a main
database, but, sometimes, this information is not easily available, or its integration
with other databases is very problematic. In this case, it is essential to establish
procedures that make a metadata distributed integration for them. This process
provides a “mapping” of available information, but it is only at logic level. Thus, on
a physical level, the data is still distributed into several resources. In this sense, this
chapter proposes a distributed rule engine extension (DREE) based on edge computing
that makes an integration of metadata provided by different heterogeneous
data sources, applying then a mathematical decomposition over the antecedent of
rules. The use of the proposed rule engine increases the efficiency and the capability
of rule-based expert systems, providing the possibility of applying these rules over
distributed and heterogeneous data sources, increasing the size of data sets that
could be involved in the decision-making process
A Precise Electrical Disturbance Generator for Neural Network Training with Real Level Output
Power Quality is defined as the study of the quality of electric power
lines. The detection and classification of the different disturbances which cause
power quality problems is a difficult task which requires a high level of engineering
expertise. Thus, neural networks are usually a good choice for the detection
and classification of these disturbances. This paper describes a powerful
tool, developed by the Institute for Natural Resources and Agrobiology at the
Scientific Research Council (CSIC) and the Electronic Technology Department
at the University of Seville, which generates electrical patterns of disturbances
for the training of neural networks for PQ tasks. This system has been expanded
to other applications (as comparative test between PQ meters, or test of effects
of power-line disturbances on equipment) through the addition of a specifically
developed high fidelity power amplifier, which allows the generation of disturbed
signals at real levels.Ministerio de Ciencia y Tecnología DPI2006-15467-C02-0
Sobre los orígenes com erciales del C onsulado de Veracruz: com ercio libre y mercado interno a fines del siglo X V III (1778-1795)
What science education is promoted for primary education in Spain? An analysis of the national curriculum
Se analiza la educación científica promovida por el currículo oficial de primaria en Es
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paña. El análisis centra la atención en los aspectos siguientes relativos a la ciencia escolar: naturaleza y
sociología de la ciencia; axiología; psicología en el aprendizaje de la ciencia; objetivos, competencias,
contenidos y criterios de evaluación; actividades, recursos y estrategias de enseñanza. Los resultados
indican que las prescripciones del currículo oficial de la LOE para la educación científica en primaria
no sintonizan adecuadamente con las actuales tendencias en Didáctica de las Ciencias. A la vista de las
carencias detectadas, se hacen algunas recomendaciones que mejorarían la propuesta oficial al respectoScience education promoted by the national curriculum of primary education in Spain
is analyzed. The analysis pays attention to the following aspects regarding the school science: nature
and sociology of science; axiology; psychology in science learning; goals, competences, contents and
evaluation criteria; activities, didactic and methodological resources and teaching strategies. Results
indicate that primary school science proposed in the national curriculum does not completely adjust
with current trends in Science Education. In view of the lacks detected in the curriculum several recommendations
are proposed
Science education in the Andalusia’s official curriculum for Primary Education: a critical analysis
Se presentan los resultados de un análisis crítico, de corte interpretativo, sobre la educación
científica que se promueve desde el curriculum oficial de Primaria para Andalucía. Para ello, se aplicó
un protocolo de análisis, ya validado por los autores en estudios anteriores, que integra una relación
de estándares o posicionamientos predominantes en la Didáctica de las Ciencias actualmente. Como
estrategia de fiabilidad, el análisis se hizo combinando procesos inter- e intra-jueces. Los resultados
revelan que la educación científica sugerida oficialmente para Andalucía no sintoniza, en cierta medida,
con las actuales tendencias en Didáctica de las Ciencias. A la vista de las carencias detectadas, se
hacen algunas recomendaciones que mejorarían la propuesta oficial, al respecto.Science education promoted by Andalusia’s official curriculum for Primary Education is analyzed by
means of a critical and interpretative analysis. For this aim a protocol validated previously by the authors
is applied. The protocol includes a set of standards referred to the current trends in science education.
As a reliability strategy, the protocol was applied by means of both interjudge and intrajudge analysis
methods. Results reveal that science education suggested for Primary Education in Andalusia does not
completely fit with current trends in science education. In view of the weaknesses detected in the document,
several recommendations are made in order to improve it.Ministerio de Ciencia e Innovación EDU2009-12760EDUC (2009-2012),Junta de Andalucía y Fondos FEDER SEJ-5219 (2010-2014
What science education is suggested in the official curriculum of Andalusia for the childhood stage?
Se analiza la educación científica establecida por el actual curriculum oficial para la etapa 3-6 años en Andalucía. Para ello, se diseñó y aplicó un cuestionario de análisis con el que se valoró de qué modo el documento oficial atiende a las siguientes dimensiones relativas a la ciencia escolar: construcción de la ciencia escolar; axiología y psicología del aprendizaje de la ciencia; objetivos y competencias; contenidos; actividades, diseño y estrategias de enseñanza; recursos didácticos y evaluación. También se comparó el currículo de Andalucía con el estatal del que deriva, a fin de evaluar sus mejoras o carencias respecto a este último. Los resultados indican que la ciencia escolar sugerida en el curriculum oficial para Infantil en Andalucía sintoniza, en su mayor parte, con las actuales tendencias en Didáctica de las Ciencias. Asimismo, que éste hace una propuesta más completa y –en ciertos aspectos- más profunda que el currículo estatalScience education promoted by current official curriculum for stage 3-6 in Andalusia is analyzed. For this aim a questionnaire was designed and applied in order to value how the official curriculum pays attention to the following aspects regarding the school science: building of school scientific knowledge; axiology and psychology of science learning; aims and competences; contents; activities, teaching design and teaching strategies; pedagogical resources; and assesement. Also the curriculum of Andalusia was compared to Spanish curriculum in order to determine its improvements and lacks with regard to this one. Results indicate that science education suggested for the Andalusian childhood education majority agrees with the current trends in science education. Also the curriculum of Andalusia does a more complete proposal and –in some aspect- more deep than Spanish curriculum
Scientific literacy at the 3-6 year old stage: an analysis of Spain’s national curriculum
Se analiza la alfabetización científica promovida por la regulación de enseñanzas mínimas
para la etapa 3-6 años en España. Para ello, se diseñó y aplicó un cuestionario combinando
procesos de análisis inter- e intra-jueces como estrategia de validación y fiabilidad. Se valoró cómo el
documento atiende a las siguientes dimensiones, relativas a la ciencia escolar: construcción de la ciencia
escolar; axiología y psicología del aprendizaje de la ciencia; objetivos y competencias; contenidos;
actividades, diseño y estrategias de enseñanza; recursos didácticos, y evaluación. Los resultados indican
que la ciencia escolar sugerida en el documento no sintoniza, en una parte importante, con las tendencias
actuales de la Didáctica de las Ciencias. A consecuencia de las carencias detectadas, se hacen
algunas recomendaciones que mejorarían la propuesta oficial.An analysis is made of the scientific literacy promoted by Spain’s national curriculum
for the 3-6 year old stage. To this end, a questionnaire was designed and implemented combining
inter- and intra-rater processes of analysis as a strategy of validation and reliability. An evaluation was
made of how the official document addresses the following dimensions of science education at this
stage: the construction of school science; the axiology and psychology of learning science; objectives
and competences; content; teaching activities, design, and strategies; and teaching resources and evaluation.
The results indicate that the school science actually being put forward in the document is, to a
major degree, out of tune with current trends in Science Teaching. In view of the deficiencies identified
in the document several improvements are recommended
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