Localización de eventos en radiofrecuencia mediante una antena de alta directividad

En el presente trabajo se analizan las emisiones electromagnéticas producidas en la banda de ultra alta frecuencia UHF por la actividad de descargas parciales (DPs). El principal objetivo es la localización de la fuente de este fenómeno mediante un sistema que no precise de contacto eléctrico y analice un área en todo su conjunto, como puede ser una subestación. Así, se detectarían con mayor rapidez los equipos que presentan fallos en una instalación, puesto que se evitaría examinar cada elemento por separado. Para captar la radiación de las descargas parciales se emplea una antena directiva acoplada a un sistema móvil que permite adquirir las ondas en diferentes posiciones. Posteriormente, se realiza una serie de cálculos sobre estas señales y a partir de sus resultados se establece la procedencia del fenómeno. Este trabajo precisa tomar como base el proyecto Control mediante Arduino del movimiento de una antena directiva con un servomotor, que proporciona el sistema móvil en el que se acopla la antena y el sistema de adquisición de las señales. Este último consiste en la comunicación entre los datos recibidos por el sensor y el software empleado para el análisis a través de una tarjeta de adquisición.This document discuss the electromagnetic emissions in the ultra high frequency (UHF) band produced by partial discharge (PD) activity. The main objective is the location of the source of this phenomenon through a system that does not require electrical contact and analyse a wide area, such as a substation. Thus, equipments that present failures in their electrical installation would be detected faster, since it would avoid to examine each element separately. To capture the radiation of partial discharges, a directional antenna attached to a mobile system that allow to analyze the waves in different positions is used. Subsequently, a series of calculations on these signals is carried out, and the origin of the phenomenon is determined based on their results. This project requires the use as a basis the work Control with Arduino from the movement of a directive antenna with a servomotor, which provides the mobile system in which the antenna is coupled and the signals acquisition system. The latter consists of the communication between the data received by the sensor and the software used for the analysis of the signals through a data acquisition card.Ingeniería en Tecnologías Industriale

Fundamentals and application of voltammetric electronic tongues in quantitative analysis

Altres ajuts: acords transformatius de la UABElectronic tongues (ETs) are bioinspired analytical tools based on the synergies between (bio)sensors and chemometrics. Through the application of chemometrics, it is possible to infer underlying relationships between the measured analytical signals and the chemical properties of the samples, both for descriptive and predictive purposes, otherwise impossible to decipher. Research in voltammetric ETs during the last two decades has demonstrated the benefits derived from the use of sensor arrays with complementary response, together with advanced data treatment methods to enhance their overall performance. In this direction, the different approaches followed when developing voltammetric ETs and some relevant applications in quantitative analysis are reviewed herein

Análisis de la relación entre área de local comercial y espacios comunes de los centros comerciales de Porto Pi Centre, Vilamarina y La Maquinista

El objetivo general del trabajo es analizar la relación entre área de local comercial y espacios comunes de los centros comerciales de Porto Pi Centre, Vilamarina y La Maquinista. El estudio se orienta en forma específica a obtener una proporción media entre ambas áreas.Postprint (published version

Valoració de l’impacte urbanístic d’un conjunt de centres universitaris i de recerca implantats recentment en els municipis de Castelldefels, Cerdanyola del Vallès, Girona, Lleida, Tarragona i Reus. Anàlisis dels indicadors demogràfics: diagnòstic de la situació de partida i dinàmiques dels municipis.

Postprint (author’s final draft

Environmental drivers of large-scale movements of baleen whales in the mid-North Atlantic Ocean

© The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Perez-Jorge, S., Tobena, M., Prieto, R., Vandeperre, F., Calmettes, B., Lehodey, P., & Silva, M. A. Environmental drivers of large-scale movements of baleen whales in the mid-North Atlantic Ocean. Diversity and Distributions, 00, (2020): 1-16, doi:10.1111/ddi.13038.Aim Understanding the environmental drivers of movement and habitat use of highly migratory marine species is crucial to implement appropriate management and conservation measures. However, this requires quantitative information on their spatial and temporal presence, which is limited in the high seas. Here, we aimed to gain insights of the essential habitats of three baleen whale species around the mid‐North Atlantic (NA) region, linking their large‐scale movements with information on oceanographic and biological processes. Location Mid‐NA Ocean. Methods We present the first study combining data from 31 satellite tracks of baleen whales (15, 10 and 6 from fin, blue and sei whales, respectively) from March to July (2008–2016) with data on remotely sensed oceanography and mid‐ and lower trophic level biomass derived from the spatial ecosystem and population dynamics model (SEAPODYM). A Bayesian switching state‐space model was applied to obtain regular tracks and correct for location errors, and pseudo‐absences were created through simulated positions using a correlated random walk model. Based on the tracks and pseudo‐absences, we applied generalized additive mixed models (GAMMs) to determine the probability of occurrence and predict monthly distributions. Results This study provides the most detailed research on the spatio‐temporal distribution of baleen whales in the mid‐NA, showing how dynamic biophysical processes determine their habitat preference. Movement patterns were mainly influenced by the interaction of temperature and the lower trophic level biomass; however, this relationship differed substantially among species. Best‐fit models suggest that movements of whales migrating towards more productive areas in northern latitudes were constrained by depth and eddy kinetic energy. Main conclusions These novel insights highlight the importance of integrating telemetry data with spatially explicit prey models to understand which factors shape the movement patterns of highly migratory species across large geographical scales. In addition, our outcomes could contribute to inform management of anthropogenic threats to baleen whales in sparsely surveyed region.We are very grateful to Cláudia Oliveira, Irma Cascão, Maria João Cruz, Miriam Romagosa and many volunteers, skilled skippers, crew and spotters that participated in the tagging fieldwork. This work was supported by Fundação para a Ciência e Tecnologia (FCT), Azores 2020 Operational Programme and Fundo Regional da Ciência e Tecnologia (FRCT) through research projects FCT‐Exploratory project (IF/00943/2013/CP1199/CT0001), TRACE (PTDC/MAR/74071/2006) and MAPCET (M2.1.2/F/012/2011) co‐funded by FEDER, COMPETE, QREN, POPH, ESF, ERDF, Portuguese Ministry for Science and Education, and Proconvergencia Açores/EU Program. We also acknowledge funds provided by FCT to MARE, through the strategic project UID/MAR/04292/2013. SPJ was supported by a postdoctoral grant (REF.GREENUP/001‐2016), MT by a DRCT doctoral grant (M3.1.a/F/028/2015), MAS by an FCT‐Investigator contract (IF/00943/2013), FV by an FCT Investigator contract (CEECIND/03469/2017) and RP by an FCT postdoctoral grant (SFRH/BPD/108007/2015). LMTL modelling work has been supported by the CMEMS Service Evolution GREENUP project, funded by Mercator Ocean. We are grateful to Elliott Hazen for offering guidance and advice, and to two anonymous referees whose comments greatly improved this work

Effects of changes in UV-B radiation levels on biofilm-forming organisms commonly found in cultural heritage surfaces

Accurate measuring and monitoring methods available since the 1980s have shown that the amount of Ultraviolet B (UV–B) radiation reaching the Earth's surface has increased as a result of degradation of the ozone layer. Since the adoption of the Montreal Protocol in 1987, ozone levels have been recovering successfully. However, in the context of the current climate change, other factors such as changes in cloud patterns and an increased incidence of natural disasters (e.g. fires) may be disrupting this recovery. The present study aimed to investigate the effects of different UV-B radiation levels on biofilms colonising heritage monuments. For this purpose, the effects of current UV-B levels on a biofilm composed of Synechocystis sp. (a cyanobacterium), Bracteacoccus minor (a green alga) and Fusarium sp. (a fungus) were compared at three points along a South-North transect: Portugal, Galicia (NW Spain) and Ireland (from highest to lowest UV-B radiation, respectively). Increased levels of UV-B radiation caused changes in the growth, physiological state and composition of subaerial biofilms, with cyanobacteria being more resistant than green algae to high levels of UV-B. A reduction of fungal growth and extracellular polymer substances (EPS) production was also observed, related to the reduction of biofilm aggregation at high UV-B levelsThis study was partly financed through EU funding (project CGL 2016-79778-R: AEI/FEDER, EU) and the Xunta de Galicia (ED431 2018/32). E. Fuentes was financially supported by a PhD Fellowship-Contract MICINN-FPI (BES-2017-079927). D. Pérez-Velón acknowledges receipt of a grant in the Programa de Doutoramento Industrial (16_IN606D_2021_2608973) financed by the Xunta de GaliciaS

A distributed and energy‑efficient KNN for EEG classification with dynamic money‑saving policy in heterogeneous clusters

Universidad de Granada/CBUASpanish Ministry of Science, Innovation, and Universities under Grants PGC2018-098813-B-C31,PID2022-137461NB-C32ERDF fund. Funding for open access charge: University of Granada/ CBU

Impact real state value of urban and transportation projects, in the metropolitan area of Barcelona

Often, research has studied the urban impact through: urban development and transport projects. The results suggest that factors from the real estate products (surface useful, number of bedrooms and bathrooms, parking, swimming pools, air conditioning, age) and environmental factors (socioeconomic status of the resident population, the proximity to infrastructure road and rail, the diversity of economic activities) are included in the expectation of real estate value. In this paper we report the results of a study that tries to simulate an integrated manner, the effect produced by large urban interventions on the accessibility, land use and real estate value in the Metropolitan Area of Barcelona. Using integrated transport model (model double bounded distribution and network assignment model) and hedonic models in a specialized GIS platform will try to simulate at census tract scale, direct impacts in the area of implementation of a specific development project, and also the indirect impact that occurs in the system of interaction of the metropolitan area of Barcelona. The analysis suggests that each group of urban development (approximately 30), produce different effects on the dimensions analyzed. The effect of transport projects is significantly lower than the effect of urban interventions as a whole, in the value of supply. This is because urban interventions, in addition to reconfigure the structure of accessibility, change the intensity of the attractions and generations of the system, a fact that no occur with only the transportation projects. There are cases where the magnitude of urban development is significant; however there are no changes in property values.Peer ReviewedPreprin

Vampire: A Smart Energy Meter for Synchronous Monitoring in a Distributed Computer System

This paper presents the design and implementation of a low-cost system oriented to the synchronised and real-time surveillance and monitoring of electrical parameters of different computer devices. To measure energy consumption in a computer system, it is proposed to use, instead of a general-purpose wattmeter, one designed ad-hoc and synchronously collects the energy consumption of its various nodes or devices. The implementation of the devised system is based on the confluence of several technologies or tools widely used in the Internet of Things. Thus, this article the intelligent objects are the power meters, whose connections are based on the low-cost ESP32 microcontroller. The message transmission between devices is carried out with the standard message queuing telemetry transport (MQTT) protocol, the measurements are grouped in a database on an InfluxDB server that store the sensor data as time series, and Grafana is used as a graphical user interface. The efficiency of the proposed energy monitoring system is demonstrated by the experimental results of a real application that successfully and synchronously records the voltage, current, active power and cumulative energy consumption of a distributed cluster that includes a total of 60 cores.Spanish Ministry of Science, Innovation, and Universities under grants PGC2018–098813-B-C31 and PID2022–137461NB-C31ERDF fun