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An overview of ancillary services in Spain
(2008-03-01)Under a deregulated environment, ancillary services (AS) are defined as the set of products separated from the energy production, which are related to security and reliability of a power system. Ancillary services can be ... -
An overview of natural gas network tariffs design considering the regulatory principles as guiding criteria
This paper analyses current approaches and proposals for gas network tariffs design at international level. Current challenges are examined so as to establish specific guidelines for natural gas tariff design considering ... -
An overview on electricity markets: International experiences
(Sin editorial (Vilamoura, Portugal), 2003-07-03)At the very beginning, the electricity industry was a fragmented sector. Later on, the increasing economies of scale and the view of electricity as a public service made governments consider the sector as a natural monopoly, ... -
An ultra-capacitor for frequency stability enhancement in small-isolated power systems: models, simulation and field tests
(2015-01-01)The most relevant issue in operation of isolated power systems is frequency stability. Frequency stability is concerned with the ability of generators to supply the loads at an acceptable frequency after a disturbance. ... -
An uncertainty reduction technique for short-term transmission expansion planning based on line benefits
In this article we provide a novel uncertainty reduction technique to deal with uncertainties associated to Renewable Energy Sources (RES) in Transmission Expansion Planning (TEP). For the sake of simplicity, we assume ... -
An updated biostratigraphy for the late Aragonian and the Vallesian of the Vallès-Penedès Basin (Catalonia).
(03/10/2016)The Vallès-Penedès Basin (Catalonia, Spain) is a classical area for the study of the Miocene land mammal faunas and includes one of the densest and most continuous records in Eurasia. Furthermore, it is the type area for ... -
An “Effective multilateralism”: the case of the European Union
(2022)La Unión Europea ha sido, desde su creación, uno de los principales ejemplos de multilateralismo en el ámbito internacional en su conjunto y, como tal, se ha convertido en uno de sus más importantes promotores. La creación ... -
Ana MALLEN y María Pilar GARCÍA-GUADILLA. Venezuela Polarized Politics. The paradox of direct democracy under Chávez. London: First Forum Press, 2017. 171 pp. ISBN: 9781626375895
(02/12/2019)Reseña del libro: Ana MALLEN y María Pilar GARCÍA-GUADILLA. Venezuela s Polarized Politics. The paradox of direct democracy under Chávez. London: First Forum Press, 2017. 171 pp. ISBN: 9781626375895. -
Ana Martín Echagüe, Desenterrar a Dios. El proceso espiritual de Etty Hillesum, Sal Terrae, Santander 2021, 278 p. ISBN: 978-84-293-3036-6.
(06/11/2021)Itinerario espiritual de Etty Hillesum. -
"Ana Ponce de León (1527-1601)"
(31/12/2018)Repaso a la biografía de doña Ana Ponce de León, monja en Santa Clara de Montilla (Córdoba) y mística del siglo XVI -
Anaerobic co-digestion study and characterisation of different digesters to maximize biogas generation
(2022)La Unión Europea comenzó recientemente la Transición Energética, con el objetivo de alcanzar la neutralidad en carbono en el año 2050 cumpliendo con el Acuerdo de París. Para conseguirlo, los sectores básicos de la economía, ... -
Anaerobic co-digestion study and characterisation of different digesters to maximize biogas generation
(2022)La Unión Europea comenzó recientemente la Transición Energética, con el objetivo de alcanzar la neutralidad en carbono en el año 2050 cumpliendo con el Acuerdo de París. Para conseguirlo, los sectores básicos de la economía, ... -
Anaerobic digestion in wastewater reactors of separated organic fractions from wholesale markets waste. Compositional and batch characterization. Energy and environmental feasibility
(2020-07-15)La industria alimentaria es uno de los principales sectores industriales de Europa y España, y por tanto uno de los mayores emisores de residuos, especialmente los orgánicos que se pueden clasificar en tres fracciones ... -
Anaerobic digestion in wastewater reactors of separated organic fractions from wholesale markets waste. Compositional and batch characterization. Energy and environmental feasibility
(15/07/2020)La industria alimentaria es uno de los principales sectores industriales de Europa y España y, por tanto, uno de los principales emisores de residuos, especialmente los ecológicos que se pueden clasificar en tres fracciones ... -
Anaerobic digestion in wastewater reactors of separated organic fractions from wholesale markets waste. Compositional and batch characterization. Energy and environmental feasibility
(2020-07-15)The food industry is one of the major industrial sectors in Europe and Spain, and therefore one of the major waste emitters, especially organic ones that can be classified into three different fractions (fruit and vegetables, ... -
Anaerobic digestion of organic fraction combinations from food waste, for an optimal dynamic release of biogas, using H2 as an indicator
(2023-01-20)El objetivo de este estudio es evaluar los efectos de mezclar las tres fracciones de residuos orgánicos elementales (fruta y verdura, carne y pescado) durante la digestión anaeróbica. Los experimentos por lotes se llevaron ... -
Anaerobic digestion of organic fraction combinations from food waste, for an optimal dynamic release of biogas, using H2 as an indicator
(2023-01-20)The objective of this study is to assess the effects of mixing the three elemental organic waste fractions (fruit and vegetable, meat, and fish) during anaerobic digestion. Batch experiments were carried out with fraction ... -
Un analisis comparativo de las estrategias competitivas de los operadores de telecomunicaciones europeos y estadounidenses desde la crisis financiera global
(01/09/2020)El objetivo de este trabajo es analizar las diferentes estrategias competitivas empleadas por los Operadores de Telecomunicaciones (OTs) europeos y estadounidenses dependiendo del papel de las instituciones, la dinámica ...