1,799 research outputs found

    Water Management Adaptation to Climate Change in Mediterranean Semiarid Regions by Desalination and Photovoltaic Solar Energy, Spain

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    [EN] Integration of renewable energy sources and water production technologies is a must when facing water scarcity problems in semiarid regions, such as Mediterranean regions. The use of additional water resources and production methods, such as reclaimed water and, more specifically, desalinated water, means present and necessary water resources to introduce in the water balances to attend to water demands within a global warming and droughting scenario. These solutions have the inconvenience of energy/power needs and costs. However, the development of renewable energies like photovoltaic solar energy, with lower and lower costs and greater efficiency, makes these economically feasible facilities, reaching competitive production costs for marine or sea desalinated water by around 50% of reduction in energy costs and 20¿30% of savings in final water production cost. This paper presents a practical project or action focused on the integration of renewable energies and new water resources by introducing a Photovoltaic Energy Plant (PVEP) as an energy source to feed a Seawater Desalination Treatment Plant (SWDTP). The PV facility is designed to cover all the energy demanded using the SWDTP during the day, and even studying the possibility of selling the energy production exceeds and injecting them into the energy supply network, covering the needs of buying energy needed during the high period where there is no photovoltaic energy production. Thus, savings related to energy costs and even incomes coming from energy sales mean an important reduction in operation costs or expenditures (OPEX), which makes economically feasible and sustainable the investment and the final price of water produced within the Mutxamel SWDTP. The final reduction cost in water desalination reaches 25% on average.Gómez Martínez, G.; Pérez-Martín, MÁ. (2023). Water Management Adaptation to Climate Change in Mediterranean Semiarid Regions by Desalination and Photovoltaic Solar Energy, Spain. Water. 15(18):1-28. https://doi.org/10.3390/w15183239128151

    Mesa redonda sobre instrucción de las causas penales por el Ministerio fiscal

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    Comparative study between nail retraining with gauze bandaging and the nail remodeling with acrylics as a conservative treatment for stage I and IIa onychocryptosis

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    Objective: Onychocryptosis is one of the most prevalent onychopathies, being a frequent reason for consultation in podiatric clinical practice. Conservative treatments are the first therapeutic choice, with nail remodeling using clotrimazole gel emerging as an alternative, although its medium-term effectiveness is unknown. The objective of this study was therefore to compare the efficacy of the technique of nail retraining using gauze bandaging with that of nail remodeling for the conservative treatment of stage I and IIA onychocryptosis. Methods: An analytical, randomized clinical trial study was performed following a longitudinal and prospective design. A sample was selected of 20 subjects presenting stage I and IIA onychocryptosis. Of these, 10 cases formed the group of nail retraining using gauze bandaging, and the other 10 the nail remodeling group. The presence of recurrence in a 3-month period was evaluated. Results: Before the intervention, the patients in the retraining group presented pain of 6.7 ± 1.9 vs. 6.8 ± 1.6 in the remodeling group, with no significant difference between the two (p = 0.900). After the 3-month follow-up period, seven of the retraining group patients presented recurrence of onychocryptosis vs. only one in the remodeling group. Conclusion: The technique of nail remodeling has a lower recurrence rate than that of nail retraining with gauze bandaging, with the pain, inflammation, and infection reported being less, and with greater patient satisfactio

    Calibration of a wind wave hindcast (1958-2008) in the Western Mediterranean using buoy data

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    Trabajo presentado en la EGU General Assemby 2012, celebrada del 22 al 27 de septiembre de 2012 en Viena (Austria)Peer Reviewe

    Are You Really Your Own Boss? Flexi-Vulnerability and False Consciousness of Autonomy in the Digital Labor Culture of Riders

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    In the European Union, over 28 million people work through more than 500 available digital platforms, and it is estimated that by 2025, this number will reach 43 million. However, we lack up-to-date and sufficient data on employed individuals, as platforms practice a policy of non-disclosure of data. This paper focuses on the so-called location-based platforms and specifically the figure of the rider, understood as the individual who, through a commercial or labor relationship with a company, performs tasks such as the delivery of goods to end customers. By conducting 143 surveys and 15 in-depth interviews with riders, we identified a series of characteristics that allow us to analyze this archetype of contemporary work–digital relations and delve deeper into relevant questions related to this figure, which have to do with the modality linked to the performance of their activity (self-employed or salaried), the levels of job satisfaction with respect to their activity, or the strategies for work or personal conciliation. Specifically, we focus on those discourses that refer to the characteristics of flexibility and autonomy inherent to this type of work, analyzing a heterogeneity of discourses that explain, on the one hand, a situation of precariousness and, in other cases, a job opportunity and a self-employment strategy, introducing the idea of flexi-vulnerability understood as a concept that captures the dual nature of flexibility and vulnerability experienced by individuals who work as self-employed in the so-called “gig” economy.This research received funding from Consejo Económico y Social de la Región de Murcia (Spain)

    Assessing the communication quality of CSR reports. A case study on four Spanish food companies

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    This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license.This article belongs to the Section Economic, Business and Management Aspects of Sustainability.Sustainability reports are tools for disseminating information to stakeholders and the public, serving the organizations in the dual purpose of communicating CSR and being accountable. The production of these reports has recently become more prevalent in the food industry, despite the fact this practice has received heavy criticism on two fronts: The quality of the tool for communication, and the extent of accountability. In addition to these criticisms, organizations must overcome the additional challenge of publishing sustainability reports that successfully meet the demands of a multi-stakeholder audience. In light of the importance of this practice, this paper presents a method to assess the communication and accountability characteristics of Spanish food companies' sustainability reports. This method is based on the method Analytic Network Process (ANP) and adopts a multi-stakeholder approach. This research, therefore, provides a reference model for improving sustainability reports, with the aim of successfully meeting their communication objectives and the demands of all stakeholders.This research has been conducted within the research activities of the Master in Corporate Social Responsibility at the Universitat Politècnica de València (http://www.master-rsc.upv.es/).We acknowledge support by the CSIC Open Access Publication Initiative through its Unit of Information Resources for Research (URICI).Peer Reviewe

    Estudio de la correlación de marcadores lipídicos y Proteínas de Fase Aguda mediante técnicas moleculares

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    Los productores de leche y derivados se enfrentan desde hace un siglo al reto de responder a la demanda de la sociedad europea de disponer de garantías de una producción con bienestar animal. Durante los últimos años se han adoptado medidas para mejorar las condiciones de los animales en las explotaciones y desarrollado sistemas de evaluación que permiten certificarlas, como el protocolo Welfare Quality®. Sin embargo, se continúan buscando herramientas y determinaciones objetivas que garanticen el efecto positivo de las modificaciones adoptadas sobre los animales. Entre los marcadores que se utilizan para ello destacan las proteínas de fase aguda siendo la haptoglobina la más relevante en leche. Las muestras analizadas han presentado un veinticinco por ciento de animales sanos con niveles indicativos de estrés o fase aguda en la leche indicando una pérdida de bienestar en las explotaciones lecheras. Una de las estrategias para reducir esta ratio, es la prevención y la detección temprana. Dado que los lípidos son una fracción de gran importancia en este alimento, el estudio de su lipidoma mediante la espectrometría de masas resulta de gran interés. En este estudio se han identificado dos especies lipídicas que se presentan como potenciales biomarcadores del estado sanitario de las vacas lecheras, permitiendo discriminar tanto la leche de animales enfermos como aquella con una concentración de haptoglobina indicativa de estrés o fase aguda. Adicionalmente, mediante el estudio lipidómico de estas muestras se han podido determinar biomarcadores lipídicos que permiten identificar el origen de la muestra en función del grado de libertad del que disponen los animales en la granja. Este grado de libertad de los animales y su capacidad de movimiento repercute directamente en el bienestar animal, postulándose así la lipidómica como una potente herramienta en el apoyo de toma de decisiones para prevención y el control sanitario de las explotaciones ganaderas de producción láctea.<br /

    Indigeneidad performada. Apuntes etnográficos de dos festivales de cine indígena en Colombia y Panamá

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    El objetivo de este artículo es contribuir al análisis del cine indígena haciendo énfasis en su circulación y consumo en los festivales indígenas. Para ello partimos de un estudio etnográfico de dos festivales celebrados en 2018 (Daupará en Colombia y Jumara en Panamá), centrado en cómo se performa lo indígena en estos eventos. Lo que trataremos de argumentar es que una etnografía de los festivales indígenas nos permite acercarnos a unas puestas en escena que muestran cómo se está configurando lo indígena en la modernidad. Estos festivales tienen tres dimensiones: 1) constituyen una performance de lo indígena a través del cuerpo y la palabra. 2) revelan unas formas de organización interna que muestran un tejido social y político relacionado con linajes y liderazgos al interior de los grupos que organizan los festivales. 3) permiten entender cómo se configura lo indígena no sólo en relación con los propios territorios concretos de cada grupo, sino también a partir de unos intercambios y unas agendas globales

    Effectiveness of short sales bans in Spain

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    URL del artículo en la web de la Revista: https://www.upo.es/revistas/index.php/RevMetCuant/article/view/2776Este trabajo estudia la influencia que han tenido en España las prohibiciones de ventas en corto en su mercado bursátil, siendo su objetivo conocer si dicha medida correctiva verdaderamente ha presentado efectos positivos en el mercado. Para determinar dicha influencia, hemos estudiado la rentabilidad, el riesgo y la liquidez del Ibex 35 en el periodo comprendido entre el 11 de noviembre de 2008 y el 31 de mayo de 2013, diferenciando en este periodo las dos restricciones establecidas en España durante la crisis. Para medir el impacto de estas prohibiciones, se han diseñado modelos econométricos de regresión lineal entre el volumen de préstamo de valores y rentabilidad del Ibex 35, llegándose a la conclusión de que las prohibiciones de las ventas en corto implantadas no han corregido las caídas en las cotizaciones y la volatilidad. Se observa, sin embargo, un significativo descenso en el volumen de negociación durante los periodos en los que la prohibición estaba vigente.This paper studies the influence of short sales bans on the Spanish stock market, and its objective is to know if this corrective measure has had positive effects on the market. To determine this influence, we have studied the profitability, risk and liquidity of Ibex 35 in the period between November 11, 2008 and May 31, 2013, distinguishing in this period between the two restrictions established in Spain during the crisis. To measure the impact of these bans, econometric linear regression models have been designed between securities lending volume and profitability of Ibex 35, concluding that the bans on short sales implemented have not corrected the falls in quotations or the volatility. However, there is a significant decrease in the volume of trading during the ban periods.Universidad Pablo de Olavid

    One model to find them all deep learning for multivariate time-series anomaly detection in mobile network data

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    Network monitoring data generally consists of hundreds of counters periodically collected in the form of time-series, resulting in a complex-to-analyze multivariate time-series (MTS) process. Traditional time-series anomaly detection methods target univariate time-series analysis, which makes the MTS analysis cumbersome and prohibitively complex. We present DC-VAE (Dilated Convolutional -Variational Auto Encoder), a novel approach to anomaly detection in MTS data, leveraging convolutional neural networks (CNNs) and variational autoencoders (VAEs). DC-VAE detects anomalies in MTS data through a single model, exploiting temporal information without sacrificing computational and memory resources. In particular, instead of using recursive neural networks, large causal filters, or many layers, DC-VAE relies on Dilated Convolutions (DC) to capture long and short-term phenomena in the data. We evaluate DC-VAE on the detection of anomalies in the TELCO TELeCOmmunication-networks dataset, a large-scale, multi-dimensional network monitoring dataset collected at an operational mobile Internet Service Provider (ISP), where anomalous events were manually labeled by experts during seven months, at a five-minutes granularity. We benchmark DC-VAE against a broad set of traditional time-series anomaly detectors from the signal processing and machine learning domains. We also evaluate DC-VAE in open, publicly available datasets, comparing its performance against other multivariate anomaly detectors based on deep learning generative models. Results confirm the advantages of DC-VAE, both in terms of MTS data modeling, as well as for anomaly detection. For the sake of reproducibility and as an additional contribution, we make the TELCO dataset publicly available to the community and openly release the code implementing DC-VAE.Este trabajo ha sido parcialmente apoyado por la ANII-FMV, Proyecto con referencia FMV-1-2019-1-155850 Anomaly Detection with Continual and Streaming Machine Learning on Big Data Telecommunications Networks, por CSIC Proyecto I+D con referencia 22520220100371UD Anomaly Detection in Time Series : Generalization and Domain Change Adaptation, por Telefónica, y por el Austrian FFG ICT-of-the-Future project DynAISEC – Adaptive AI/ML for Dynamic Cybersecurity Systems – project ID 887504. Gastón García fue apoyado por la beca ANII POS-FMV-2020-1-1009239, así como por CSIC, en el marco del programa Movilidad e Intercambios Académicos 2022
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