Optimization of Energy Distribution in Solar Panel Array Configurations by Graph Theory and Minkowski’s Paths

Nowadays, the development of the photovoltaic (PV) technology is consolidated as a source of renewable energy. The research in the topic of maximum improvement on the energy efficiency of the PV plants is today a major challenge. The main requirement for this purpose is to know the performance of each of the PV modules that integrate the PV field in real time. In this respect, a PLC communications based Smart Monitoring and Communications Module, which is able to monitor at PV level their operating parameters, has been developed at the University of Malaga. With this device you can check if any of the panels is suffering any type of overriding performance, due to a malfunction or partial shadowing of its surface. Since these fluctuations in electricity production from a single panel affect the overall sum of all panels that conform a string, it is necessary to isolate the problem and modify the routes of energy through alternative paths in case of PV panels array configuration.

Phases Dynamic Balancer

Most of the current domestic installations are single phase, with contracted power equal to or less than 15 kW and with a potential difference of 230 V. When consumption is expected to be higher you choose to use three different alternating currents with a difference voltage of 400 V between them, which are called phases. This enables the subdivision of the installation in different single-phase circuits, fed independently with the neutral installation. These couples have, in turn, a difference in voltage of 230 V. The neutral is common for all three phases so that, if the system is balanced, no current flows through it. The problem with these installations is that they are designed to work in an offset manner, using phase loads, and simultaneously an equal amount of energy consumed by the three phases of the network. Connection to each of the phases makes independent single-phase loads or disturbance of the operation of the original phase circuit and, consequently, the corresponding increases in consumption, heating of engines, etc.

CAISL: Simplification Logic for Conditional Attribute Implications

In this work, we present a sound and complete axiomatic system for conditional attribute implications (CAIs) in Triadic Concept Analysis (TCA). Our approach is strongly based on the Simplification paradigm which offers a more suitable way for automated reasoning than the one based on Armstrong’s Axioms. We also present an automated method to prove the derivability of a CAI from a set of CAI s.

Ultrafast transient absorption spectroscopy: principles and applications

The study of photophysical and photochemical processes crosses the interest of many fields of research in physics, chemistry and biology. In particular, the photophysical and photochemical reactions, after light absorption by a photosynthetic pigment-protein complex, are among the fastest events in biology, taking place on timescales ranging from tens of femtoseconds to a few nanoseconds. Among the experimental approaches developed for this purpose, the advent of ultrafast transient absorption spectroscopy has become a powerful and widely used technique.[1,2] Focusing on the process of photosynthesis, it relies upon the efficient absorption and conversion of the radiant energy from the Sun. Chlorophylls and carotenoids are the main players in the process. Photosynthetic pigments are typically arranged in a highly organized fashion to constitute antennas and reaction centers, supramolecular devices where light harvesting and charge separation take place. The very early steps in the photosynthetic process take place after the absorption of a photon by an antenna system, which harvests light and eventually delivers it to the reaction center. In order to compete with internal conversion, intersystem crossing, and fluorescence, which inevitably lead to energy loss, the energy and electron transfer processes that fix the excited-state energy in photosynthesis must be extremely fast. In order to investigate these events, ultrafast techniques down to a sub-100 fs resolution must be used. In this way, energy migration within the system as well as the formation of new chemical species such as charge-separated states can be tracked in real time. This can be achieved by making use of ultrafast transient absorption spectroscopy. The basic principles of this notable technique, instrumentation, and some recent applications to photosynthetic systems[3] will be described. Acknowledgements M. Moreno Oliva thanks the MINECO for a “Juan de la Cierva-Incorporación” research contract. References [1] U. Megerle, I. Pugliesi, C. Schriever, C.F. Sailer and E. Riedle, Appl. Phys. B, 96, 215 – 231 (2009). [2] R. Berera, R. van Grondelle and J.T.M. Kennis, Photosynth. Res., 101, 105 – 118 (2009). [3] T. Nikkonen, M. Moreno Oliva, A. Kahnt, M. Muuronen, J. Helaja and D.M. Guldi, Chem. Eur. J., 21, 590 – 600 (2015).

El community manager y la comunicación de los valores de marca de destino a través de los medios sociales.

El objeto de esta comunicación trabajo es analizar la comunicación de los valores de marca de destinos que proyectan los principales destinos turísticos en España. Se parte de la hipótesis de que, hasta la fecha, los territorios no explotan lo suficiente sus valores de marca, ya que utilizan más los social media para comunicar atractivos, a pesar de que los usuarios prefieren compartir más las experiencias y lo emocional. Para ello, el trabajo se apoya en una encuesta a los responsables de la comunicación digital o community managers de diferentes destinos turísticos, así como en el análisis de contenido de los mensajes compartidos en las principales redes sociales (Twitter y Facebook). Como principales resultados, se observa que salvo excepciones, los destinos turísticos españoles optan por compartir más información sobre atributos tangibles frente a los valores de marca que en realidad, suelen ser señas de identidad que definen la personalidad de un destino, y que son en general más valorados por los viajeros en los medios sociales.

Persistencia del virus de la enfermedad de linfocistis (LCDV) en agua

El virus de la enfermedad de linfocistis (LCDV), perteneciente al género Lymphocystivirus (familia Iridoviridae), es el agente etiológico de la enfermedad de linfocistis (LCD), principal patología de origen vírico descrita en doradas en la acuicultura marina mediterránea. Aunque esta enfermedad es muy frecuente, las vías de transmisión de su agente etiológico no se han dilucidado completamente, considerándose el contacto directo entre peces o la ruta hídrica las principales vías de entrada del virus en los sistemas acuícolas. Aunque el LCDV puede transmitirse vía hídrica, al menos de forma experimental, no existen resultados sobre su persistencia en agua de mar, lo que es esencial para determinar la importancia del agua como ruta de transmisión del virus en las piscifactorías marinas. En el presente trabajo se ha abordado el estudio de la capacidad de persistencia del LCDV en agua de mar sometida a diferentes tratamientos, observándose el efecto de los factores bióticos y abióticos sobre dicha persistencia. Para el estudio se utilizó un stock vírico de la cepa de colección ATCC VR-342, usando agua de mar artificial y agua de mar sometida a tratamientos (esterilización por calor húmedo y filtración) para eliminar microorganismos y materia orgánica presentes en el agua, evaluándose el efecto de estos tratamientos, así como la temperatura (18°C y 22°C) y la carga viral, en la infectividad del virus. Se determinó el título infectivo de las suspensiones víricas en las muestras a diferentes tiempos mediante ensayo en cultivos celulares, aplicando el método de dilución final de efecto citopático (TCID50) y ensayo ICC-RT-PCR (Integrated Cell Culture-RT-PCR). Los resultados obtenidos indican que los factores abióticos presentes en el agua sometida a esterilización por filtración y calor no afectan significativamente a la persistencia del virus. Sin embargo, se ha demostrado que tanto la temperatura como la carga vírica son factores determinantes de la persistencia del LCDV en agua.

Relación de la enzima alfa-amilasa salivar con la presencia de sintomatología psicopatologica internalizada auto- y hetero-observada en una muestra de niños y niñas de entre 7 y 12 años de edad: un estudio piloto.

Introducción: La medición de la actividad enzimática (AAAs) y del flujo de secreción (FSAAs) de la enzima alfa-amilasa salivar han sido propuestos por diversos grupos de investigación como posibles marcadores biológicos indirectos, no invasivos, y de bajo coste, del nivel de actividad noradrenérgica periférica/central. Dicha actividad noradrenérgica se sustenta, esencialmente, gracias a la actividad preponderante del denominado Sistema Locus Coeruleus-Noradrenalina (LC-NA), un sistema básico en la modulación de diversas funciones atencionales, cognitivas ejecutivas, así como en la regulación de los estados de ánimo. Material y Método: En nuestro estudio piloto (N = 13; 9 niños, 4 niñas; Edad media ± DT = 10,23 ± 1,53) se analizó la relación entre ambos marcadores salivares junto al parámetro flujo de secreción salivar total (registrados a lo largo de un proceso de evaluación neuropsicológica escolar) y diversas medidas auto (CDI; ansiedad, depresión y depresión total) y hetero-reportadas (escalas de psicopatología internalizada del TRF: ansiedad- depresión, depresión-aislamiento, alteraciones psicosomáticas y psicopatología internalizante total). Resultados: Los análisis estadísticos basados en el cálculo de coeficientes de correlación producto-momento de Pearson (de tipo parcial al controlar el efecto de la variable IMC), revelaron correlaciones estadísticamente significativas y directas entre el FSAAs y las puntuaciones en la escala ansiedad-depresión (p < 0,039) y psicopatología internalizante total del TRF (p < 0,012), así como una tendencia a la significación en el caso de las puntuaciones para la escala de alteraciones psicosomáticas (p = 0,054) de esa misma prueba. Del mismo modo, se observaron tendencias a la significación en la asociación directa entre las subescalas ansiedad-depresión (p = 0.065) y psicopatología internalizante total (p = 0.083) y la medida del flujo salivar total. Por otro lado, se observaron asociaciones inversas estadísticamente significativas entre la variable flujo salivar total y las puntuaciones de ansiedad (p < 0.01) y depresión total (p < 0.01) obtenidas a través del CDI. Discusión: Estos resultados preliminares de este estudio piloto abren una interesante línea de trabajo en nuestro laboratorio acerca de la utilidad de la medición de la AAAs, FSAAs y FST como posibles marcadores biológicos, no invasivos, y de bajo coste, aptos para su empleo con poblaciones pediátricas. Dichos marcadores, están relacionados con el grado de actividad noradrenérgica periférica/central desarrollada por el sistema LC y con la actividad del SNV, que a su vez están implicados en la regulación de los estados afectivos. Estudios recientes han mostrado bajos niveles basales de alfa-amilasa salivar en el caso de pacientes jóvenes diagnosticados de su primer episodio depresivo (Cubala y Landoski, 2014) y en participantes infantiles con mayor sintomatología depresiva heteroobservada (Vigil et al., 2006; Maldonado et al., 2014; Maldonado, enviado). Estos resultados complementan las observaciones realizadas anteriormente por nuestra laboratorio (Maldonado et al., 2014; Maldonado, enviado).

WordPress as a framework for automated data capture, filtering and structuring processes

The Exhibitium Project , awarded by the BBVA Foundation, is a data-driven project developed by an international consortium of research groups . One of its main objectives is to build a prototype that will serve as a base to produce a platform for the recording and exploitation of data about art-exhibitions available on the Internet . Therefore, our proposal aims to expose the methods, procedures and decision-making processes that have governed the technological implementation of this prototype, especially with regard to the reuse of WordPress (WP) as development framework.

Multivalent reuse of web data about temporary art exhibitions: The Exhibitium Project

Our proposal aims to display the analysis techniques, methodologies as well as the most relevant results expected within the Exhibitium project framework (http://www.exhibitium.com). Awarded by the BBVA Foundation, the Exhibitium project is being developed by an international consortium of several research groups . Its main purpose is to build a comprehensive and structured data repository about temporary art exhibitions, captured from the web, to make them useful and reusable in various domains through open and interoperable data systems.

A discrete-time queueing system with feedback and optional service

Queueing systems constitute a central tool in modeling and performance analysis. These types of systems are in our everyday life activities, and the theory of queueing systems was developed to provide models for forecasting behaviors of systems subject to random demand. The practical and useful applications of the discrete-time queues make the researchers to con- tinue making an e ort in analyzing this type of models. Thus the present contribution relates to a discrete-time Geo/G/1 queue in which some messages may need a second service time in addition to the rst essential service. In day-to-day life, there are numerous examples of queueing situations in general, for example, in manufacturing processes, telecommunication, home automation, etc, but in this paper a particular application is the use of video surveil- lance with intrusion recognition where all the arriving messages require the main service and only some may require the subsidiary service provided by the server with di erent types of strategies. We carry out a thorough study of the model, deriving analytical results for the stationary distribution. The generating functions of the number of messages in the queue and in the system are obtained. The generating functions of the busy period as well as the sojourn times of a message in the server, the queue and the system are also provided.

Materials design for ambipolar devices: tuning orbital energetics in oligothiophene-naphthalimides semiconductors

Ambipolar organic field-effect transistors (OFETs), which can efficiently transport both holes and electrons, using a single type of electrode, are currently of great interest due to their possible applications in complementary metal oxide semiconductor (CMOS)-like circuits, sensors, and in light-emitting transistors. Several theoretical and experimental studies have argued that most organic semiconductors should be able to transport both types of carrier, although typically unipolar behavior is observed. One factor that can compromise ambipolar transport in organic semiconductors is poor solid state overlap between the HOMO (p-type) or LUMO (n-type) orbitals of neighboring molecules in the semiconductor thin film. In the search of low-bandgap ambipolar materials, where the absence of skeletal distortions allows closer intermolecular π-π stacking and enhanced intramolecular π-conjugation, a new family of oligothiophene-naphthalimide assemblies have been synthesized and characterized, in which both donor and acceptor moieties are directly conjugated through rigid linkers. In previous works we found that oligothiophene-napthalimide assemblies connected through amidine linkers (NDI derivates) exhibit skeletal distortions (50-60º) arising from steric hindrance between the carbonyl group of the arylene core and the sulphur atom of the neighbored thiophene ring (see Figure 1). In the present work we report novel oligo- and polythiophene–naphthalimide analogues NAI-3T, NAI-5T and poly-NAI-8C-3T, in which the connections of the amidine linkage have been inverted in order to prevent steric interactions. Thus, the nitrogen atoms are directly connected to the naphthalene moiety in NAI derivatives while they were attached directly to the thiophene moiety in the previously investigated NDI-3T and NDI-5T. In Figure 1 is depicted the calculated molecular structure of NAI-3T together with that of NDI-3T showing how the steric interactions are not present in the novel NAI derivative. The planar skeletons in these new family induce higher degree of crystallinity and the carrier charge transport can be switched from n-type to ambipolar behaviour. The highest FET performance is achieved for vapor-deposited films of NAI-3T with mobilities of 1.95x10-4cm2V-1s-1 and 2.00x10-4cm2V-1s-1 for electrons and holes, respectively. Finally, these planar semiconductors are compared with their NDI derivates analogues, which exhibit only n-type mobility, in order to understand the origin of the ambipolarity in this new series of molecular semiconductors.

Tutorial de R-Text Mining Solution

R.TeMiS (R Text MIning Solution) (Bouchet-Valat & Bastin, 2013) es un paquete de R (RcmdrPlugin.temis) (Bouchet-Valat, 2016), concebido como plugin de R Commander, que permite analizar, manipular y crear corpus de textos (Garnier, 2014). La arquitectura estadística de RTemis corre a cargo del paquete tm desarrollado por Ingo Feinerer (Feinerer, 2008 ; 2011 ; Feinerer, Hornik y Meyer, 2008). R.TeMiS se ha completado con otros paquetes clásicos de R, como el paquete para la representación de los análisis factoriales de correspondencias de Nenadic y Greenacre (2007). También se han desarrollado paquetes específicos para facilitar el uso de R.TeMiS en los estudios de prensa, por ejemplo para la gestión de los corpus de artículos de prensa de la base de datos Factiva. R.TeMiS se presenta como un plugin de R Commander, desarrollado por Fox (2005), lo cual facilita su utilización para los no usuarios de R.

Observación Sistemática y Análisis de Contextos

Material docente para la asignatura de Observación sistemática y análisis de Contextos donde se intenta ver qué es la Observación en la Educación Infantil, la necesidad del uso de la misma para la práctica educativa, así como usarla para recoger datos, interpretarlos y elaborar un informe de Observación

Violencia de Género: Detección y Pautas de Actuación

En este curso se contempla la violencia de género desde una perspectiva humana, social, asistencial y jurídica. Se matizarán las principales diferencias y características entre violencia de género y violencia doméstica así como las posibles respuestas a los casos que se nos planteen Así se destacarán las pautas de actuación ante una víctima de violencia de género y un maltratador.

Adapting Victorian Gypsies for the Screen: Ethnicity, Otherness and (In)visibility in Neo-Victorian Popular Film

This paper aims at analysing the presence of gypsy characters in two neo-Victorian popular films, namely Joe Johnston’s The Wolfman (2010) and Guy Ritchie’s Sherlock Holmes: Game of Shadows (2011). The cultural construction of nineteenth-century gypsies, those “Others within Europe” (Boyarin 433) whose presence in Victorian fiction was peripheral, spectral and at times invisible (Nord 3-4), is simultaneously exploited and contested by these two neo-Victorian screen narratives to raise issues of otherness and invisibility on the screen. Setting off from the premise that screen texts, just like print texts, can also be participant in the neo-Victorian project of reimagining the underside of Victorian culture for contemporary audiences (Whelehan 273), this paper traces how the adaptation of Victorian gypsies for the screen, true to the palimpsestuous potential inherent to the process of adaptation (Hutcheon 6) and sharing the double drive between past and present which characterises the neo-Victorian genre (Arias and Pulham xiii; Shiller 539), hybridises our cultural memory of the Victorian Age on the screen while concurrently raises concerns over the persistent liminal status of gypsies in contemporary European culture. In particular, this paper illustrates how the tropes prototypically associated to gypsies (namely their nomadic lifestyle, mysticism, alienated existence or their perceived association to criminality) which can be traced back to Victorian culture are deployed on the neo-Victorian popular screen (with varyingly succesful outcomes) to comment on their (in)visibility in the European popular imagination.