Entity

Time filter

Source Type

Las Palmas de Gran Canaria, Spain

The University of Las Palmas de Gran Canaria, also known as the ULPGC is a Spanish university located in Las Palmas de Gran Canaria, the capital city of Gran Canaria island. It consists of five campuses: four in Gran Canaria and one in the island of Lanzarote, with Tafira being the largest. The University was created in 1989 after many years of petitions from the people of Gran Canaria. The university was incorporated through the University Reorganization Act of 1989. ULPGC was created as the aggregation of the teaching centers of former "Universidad Politécnica de Canarias", focused on engineering , and the centers from neighboring Universidad de La Laguna that were located in Las Palmas province. Wikipedia.


Caminero J.A.,University of Las Palmas de Gran Canaria
International Journal of Tuberculosis and Lung Disease | Year: 2010

Although the multidrug-resistant tuberculosis (MDRTB) epidemic is a very recent problem, many studies have attempted to understand it. We now have good estimates of the current burden (approximately 500 000 MDR-TB cases worldwide), and following the introduction of potential MDR-TB control strategies projections of these figures are being estimated. The projected trends in tuberculosis (TB) and MDR-TB incidence vary. Risk factors for resistance can be divided into two categories: 1) those facilitating the selection of resistance in the community and 2) the specific conditions that appear to increase some patients' vulnerability to resistance. The epidemiological situation varies greatly across countries, principally due to poor treatment practices and poor implementation of control programmes in the past-and even today, to a lesser degree-and recent data have suggested that national TB programmes that use existing drugs efficiently can postpone and even reverse the MDR-TB epidemic. Other factors that have also contributed to this epidemic situation are analysed in this article. The recognition of factors leading to the epidemic in some regions and the identification of populations at risk will assist in focusing case-finding efforts. From an individual perspective, treatment failures with first-line rifampicin-containing regimens and contacts of MDR-TB cases have the highest rates of resistance. Patients previously treated for TB and the other risk factors analysed in this article should be prioritised in case finding. © 2010 The Union. Source


Schallenberg-Rodriguez J.,University of Las Palmas de Gran Canaria | Haas R.,Vienna University of Technology
Renewable and Sustainable Energy Reviews | Year: 2012

Since 1998 the Spanish Government established a feed-in system where RES-E generators could choose between two alternatives: fixed feed-in tariff and premium. Nowadays, all RES-E1 can be sold in the electricity market (getting an additional premium) except for solar photovoltaic. One important novelty established in 2007 is a cap and floor system for facilities under the premium option. The aim of this paper is to analyze and compare these two alternative options, fixed-FIT and premiums, which coexist at the same time in Spain, describe the evolution of both systems and evaluate its performance. The introduction of this support system in Spain led to very good results in terms of RES-E deployment. The main advantage of the premium option is that it is a scheme integrated in the electricity market. One disadvantage is that it can occasionally lead to overcompensation; one way to try to avoid it is to set a cap value. In order to evaluate the performance of this dual support system not only RES-E deployment has been assessed but also the policy stability, the adequacy of RES-E production to the electricity demand pattern and the changes in the investors' behaviour. © 2011 Elsevier Ltd. All rights reserved. Source


Sousa C.,University of Barcelona | Tosoni S.,University of Barcelona | Tosoni S.,University of Las Palmas de Gran Canaria | Illas F.,University of Barcelona
Chemical Reviews | Year: 2013

Theoretical methods together with appropriate surface models are capable of treating very large oxide systems with an increasing predictive power, especially for the ground-state properties and chemical reactivity. In any case, the progress in CI (configuration interaction) methods specially designed to reproduce excitation energies, such as difference-dedicated configuration interaction (DDCI), together with the remarkable advances in DFT and TD-DFT methods, which are nowadays applicable to cluster or periodic surface models, has paved the way for the study of more realistic systems. The modeling of dye-sensitized solar cells (DSSCs) where the oxide surface, the adsorbed dye, and the effect of the solvent are all taken into account simultaneously to predict the absorption spectrum of the corresponding system constitute no doubt a landmark toward the theoretically assisted prediction and engineering of more efficient DSSCs. Source


Schallenberg-Rodriguez J.,University of Las Palmas de Gran Canaria
Renewable and Sustainable Energy Reviews | Year: 2013

The literature review shows a wide range of methodologies aiming at determining the photovoltaic (PV) potential. Very often, the methodology scale is too large (continents, countries or large regions) or too small (cities) or it is based on specific and non-commonly available software tools. This is why the proposed methodology to determine the PV roof potential in regions and/or islands can be useful. This methodology has been applied to the Canary Islands. Firstly, the available roof area for PV systems is determined, based on the total roof surface (using real data from the Spanish Cadastre) and utilization factors according to the municipality type. The methodology proposed to calculate the available roof surface is then compared to other well-known methods, including potential improvements using Geographical Information Systems. Secondly, the mean annual global solar radiation per municipality on inclined surfaces has been determined. To do so, a review of different methodologies has been assessed in a comprehensible manner, seeking for the ones that provide accuracy and simplicity. Thirdly, the yearly PV production per municipality has been calculated. For this, a step-by-step method to calculate the PV system efficiency, based on existing literature, has been detailed. Three different scenarios depending on the shared use of the available roof surface are defined and the corresponding PV production is calculated. A sensitivity analysis is also included, analyzing PV production in two cases: depending on back ventilation of the roof-mounted PV systems and on PV cell type (poly-crystalline to mono-crystalline). Finally, an economic assessment based on cost-resource curves is carried out. The spirit of the paper is to develop a methodology based on accuracy and, at the same, simplicity, understanding such as a method where all the calculations can be easily done using pen and paper, calculator and common office software programs. © 2012 Elsevier Ltd. Source


Schallenberg-Rodriguez J.,University of Las Palmas de Gran Canaria
Renewable and Sustainable Energy Reviews | Year: 2013

Wind energy represents an important energy source and, even more, it is called to play a crucial role in the future energy supply. In this context, it is crucial to estimate the technical and economical wind energy potential in different regions and areas. This paper includes an extensive review of methodologies proposed by several authors. Based on this review, a set of equations for the evaluation of wind energy production in a given area is proposed, being the input data: mean wind speed and shape factor at any height or even just the mean wind speed. To calculate the wind energy production, wind farm configuration (array efficiency/wake losses) and extrapolation/ interpolation of wind speed and shape factor of Weibull distribution to the hub height, have been the main issues discussed. The distances among wind turbines are determined according to economic criteria, where two different approaches have been considered: maximizing income or minimizing cost per kWh. Available wind data usually include mean wind speed and shape factor at certain heights but, very often, not at the hub height. Several methods for extra/interpolation of wind speed and shape factor have been reviewed and a set of equations has been proposed to calculate them at the hub height. A methodology to calculate the annualized wind generation cost (c€/kWh) is also proposed. One of the premises of this methodology has been that calculations should be able to be done simply using calculator and common office software programs. Another premise has been that the methodology proposed is not meant for a detailed evaluation of energy production of one particular windfarm, but to establish a general methodology to study relatively big areas, like islands or whole regions. A practical application of the methodology proposed has been carried out using wind data from the Canary Islands. © 2013 Elsevier Ltd. Source

Discover hidden collaborations