402 research outputs found

    Complete Dataset to be used as a workbench to evaluate the profitability of an offshore wind farm

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    The presented data collection has been used in the paper Multi-objective optimization of a uniformly distributed offshore wind farm considering both economic factors and visual impact, but can be used for a realistic evaluation of the annual energy production of an offshore wind farm and/or the calculation of the project investment cost. It contains realistic wind data, a bathymetric map, the definition of the coast shoreline and forbidden zones, as well as the acquisition and installation cost for the most important components influencing the investment and operation costs.CERVERA research program of CDTI under the research Project79 HySGrid+ CER-2019101

    Optimization of regular offshore wind-power plants using a non-discrete evolutionary algorithm

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    Offshore wind farms (OWFs) often present a regular configuration mainly due to aesthetical considerations. This paper presents a new evolutionary algorithm that optimizes the location, configuration and orientation of a rhomboid-shape OWF. Existing optimization algorithms were based on dividing the available space into a mess of cells and forcing the turbines to be located in the centre of a cell. However, the presented algorithm searches for the optimum within a continuous range of the eight parameters that define the OWF, which allows including a gradient-based local search operator to improve the optimization process. The study starts from a review of the economic data available in the bibliography relative to the most significant issues influencing the profitability of the investment in terms of the Internal Rate of Return (IRR). In order to address the distinctive characteristics of OWFs, specific issues arise which have been solved. The most important ones are: interpretation of nautical charts, utilization of the seabed map with different load-bearing capacities, and location of the shoreline transition

    Un análisis de la eficiencia de municipios turísticos españoles

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    The objective of this study is to know which exogenous factors condition the efficiency of the municipalities with tourist orientation. This study is one of the few publications based on the efficiency of tourism municipalities. Unlike most of the research that assesses municipal efficiency in general, it is believed that this document contributes to related literature by offering ideas to relatively inefficient tourism municipalities about improving efficiency.El objetivo de este estudio es conocer qué factores exógenos condicionan la eficiencia de los municipios con una marcada orientación turística. Este estudio es una de las pocas publicaciones basadas en la eficiencia de municipios turísticos. A diferencia de la mayoría de las investigaciones que evalúan la eficiencia municipal en general, se cree que este documento contribuye a la literatura relacionada ofreciendo ideas a los municipios turísticos relativamente ineficientes sobre la mejora de la eficiencia

    Studying The Consumption of IBM Quantum Computers

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    Quantum computing has been evolving noticeably and has become a huge revolution in computing. One of the effects of using quantum computers is that the energy required to solve high complexity problems is reduced, a crucial issue considering that there are estimations affirming that by 2030 the 20% of the global energy will be used by ICT. To the best of our knowledge, up to now there are no studies about quantum consumption. In this paper we check whether the consumption needed to execute a quantum program depends on the quantum computer used. We measured the energy required by some IBM’s quantum computers when executing an algorithm. As a result, we can state that (1) it seems that it is not needed to use a computer with the highest quantum volume for simple problems and (2) the computer processor seems to have an impact on the time and energy required

    Recommender system to identify students with learning deficiencies in assessments

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    [EN] Find areas and indicators of achievement where students need to reinforce their knowledge is a difficult task for teachers in schools. This article presents a decision-making support system that allows teachers to identify students with poor academic performance. The strategy is a Matrix Based Recommender System to rate assessments and share the results using statistical graphs. To validate this proposal we used focus group and daily meetings methodologies. The proposed strategy was tested in UGEL07-Lima-Perú with 135 schools and 25491 students in evaluation process. The evaluation results show that teachers agree with the proposed strategy, because it allows them to have assessment information everywhere and at every time. The results also highlight that using the tool users can have visual information in real time. Furthermore, the information shared through the application improves decision-making on corrective actions for poor academic performance in evaluated areas

    Propuestas sobre la enseñanza de la informática cuántica

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    Estamos asistiendo a una nueva revolución en la que la que los computadores cuánticos empiezan a ser una realidad para resolver problemas difíciles, no resolubles con los actuales computadores “clásicos”. La computación cuántica abre nuevos perfiles profesionales en la informática y aparecen ofertas de trabajo a todos los niveles. Este artículo trata la problemática de que la mayoría de los computing curricula no contemplan este nuevo tipo de paradigma, exceptuando algunos pocos planes de estudios y cursos de tipo MOOC (Massive Online Open Courses) ya ofrecen cierta formación en computación cuántica. En este artículo se presenta un análisis de la situación actual y se propone la inclusión de la materia de Informática Cuántica (y sus correspondientes asignaturas) en los planes de estudio de Ingeniería Informática.We are immersed in a new revolution in which quantum computers have become a real as these can solve difficult problems, not solvable with the current "classic" computers. Quantum computing opens up new professional profiles and roles in computer science, with many job positions offered at different levels. The problem addressed by this paper lies in the fact that most of the computing curricula do not reflect this change since these curricula do not encompass this new type of computation paradigm. Exceptionally, only some few curricula and MOOC courses (Massive Online Open Courses) already offer some training in quantum computing. This article presents an analysis of the current situation and proposes the inclusion of the subject of Quantum Computing in the Computer Engineering curricula.Este trabajo ha sido soportado por los proyectos BIZDEVOPS-Global (RTI2018-098309-B-C31) y ECLIPSE (RTI2018-094283-B-C31) financiados por el Ministerio de Economía, Industria y Competitividad (MINECO) & Fondo Europeo de Desarrollo Regional (FEDER)

    Pedogenic Processes in a Posidonia oceanica Mat

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    Scientists studying seagrasses typically refer to their substratum as sediment, but recently researchers have begun to refer to it as a soil. However, the logistics of sampling underwater substrata and the fragility of these ecosystems challenge their study using pedological methods. Previous studies have reported geochemical processes within the rhizosphere that are compatible with pedogenesis. Seagrass substratum accumulated over the Recent Holocene and can reach several meters in thickness, but studies about deeper layers are scarce. This study is a first attempt to find sound evidence of vertical structuring in Posidonia oceanica deposits to serve as a basis for more detailed pedological studies. A principal component analysis on X-Ray Fluorescence-elemental composition, carbonate content and organic matter content data along a 475 cm core was able to identify four main physico-chemical signals: humification, accumulation of carbonates, texture and organic matter depletion. The results revealed a highly structured deposit undergoing pedogenetical processes characteristic of soils rather than a mere accumulation of sediments. Further research is required to properly describe the substratum underneath seagrass meadows, decide between the sediment or soil nature for seagrass substrata, and for the eventual inclusion of seagrass substrata in soil classifications and the mapping of seagrass soil resourcesThis work has been funded by project SUMILEN (CTM2013- 47728-R, MINECO). C. Leiva-Dueñas was supported by a PhD scholarship funded by the Spanish Ministry of Science and Innovation (FPU15/01934); O. Serrano was supported by an ARC DECRA DE170101524. Authors would like to thank the use of RIAIDT-USC analytical facilities. This is a paper from the Group of Benthic Ecology 2014 SGR 120S

    Inclusión de los medios tecnológicos en el Plan de Inspección de Andalucía

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    Este artículo muestra parte de la investigación conducente a elaborar una tesis doctoral sobre la supervisión de la acción tutorial y la orientación educativa por la Inspección de Educación de Andalucía y el uso de los medios tecnológicos previstos en el Plan de Inspección para el curso 2016/2017. La  investigación se realizó con el fin de conocer en qué medida la puesta en práctica del Plan de Actuación de la Inspección Educativa está contribuyendo a la mejora de la acción tutorial y la orientación educativa y profesional, así como cuál es el grado de inclusión de los recursos TIC en las actuaciones. Para ello se diseñó un cuestionario “ad hoc” compuesto de veintisiete ítems, dividido en tres dimensiones,  el cual fue cumplimentado por 98 miembros del Servicio de Inspección en las diferentes provincias que componen la comunidad autónoma. Los resultados obtenidos nos permiten conocer que la herramienta más usada es la plataforma Séneca, seguida por la plataforma Inspectio, así como un uso minoritario de la videoconferencia.  A su vez, del análisis de los resultados se constata un nivel bajo de asesoramiento o supervisión sobre la integración de las TIC en relación con todos los agentes implicados en la acción tutorial (profesorado, orientadores de los IES y Servicios de Orientación Educativa).

    Incidence of Hypertension in a Cohort of Spanish University Graduates:The SUN Study

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    Hypertension is a major public health problem. However, no estimates of age- and sex-specific incidences are available for the Spanish population. Our objective was to estimate the incidence of hypertension in a cohort of university graduates in Spain. We followed up 5648 individuals aged 25-65 years who were initially free of hypertension, diabetes, and cardiovascular disease for a median of 30 months. New diagnoses of hypertension were identified using mailed questionnaires. We validated the self-reported diagnosis of hypertension. In 18 250 person-years of follow-up, we identified 248 new cases of hypertension. The unadjusted incidences of hypertension in women and men were 8.2 per 1000 person-years (95% CI, 6.7-10.1) and 21.8 per 1000 person-years (95% CI, 18.6-25.4), respectively. The cumulative probability of receiving a medical diagnosis of hypertension by the age of 65 years was 50% among women and 72% among men. In conclusion, we have provided new evidence confirming that hypertension is one of the most important public health problems in Spain

    Paleogene evolution of the External Betic Zone and geodynamic implications

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    Interdisciplinary studies combining field data (geological and tectonic mapping, lithostratigraphic reconstructions, lithofacies characterization, correlations and sampling) and laboratory analyses (biostratigraphy, chronostratigraphy, clay mineralogy and sandstone petrography) of eight Senonian-Paleogene successions from the Sierra de La Pila and Sierra de El Carche areas (Murcia province, SE Spain) belonging to the External Betic Zone are presented. Field evidence of tectonic activity (slumps, olistostromes, syn-genetic folds, lateral variability, changes in thicknesses, para- and unconformity boundaries, stratigraphic gaps, shallowing upward trends to emersion, etc.) was found in several Paleogene intervals. The results enable a better reconstruction of the stratigraphic architecture and chronostratigraphy of the Paleogene record, highlighting in particular: facies evolution, discontinuities, depositional sequences (Middle-Upper Maastrichtian, Upper Paleocene-Middle Eocene, Oligocene-Lower Aquitanian), environmental evolution (homogeneous conditions during the Late Cretaceous and successive realm diversification from platform to slope to basin) and correlations, along the Prebetic to Subbetic transition, which is a key sector to understand the northeastward variations of the South Iberian margin. A conclusive paleogeographic and geodynamic evolutionary model for the study area is proposed, hypothesizing that Paleogene compressive tectonics affected the eastern External Betic Zone. In addition, correlations with successions from the western External Betic Zone evidenced asynchronous deformation from east to west along the internalmost External Betic Zone. Moreover, a comparison with the external Tunisian Tell enables the recognition of similar sedimentarytectonic events, imposing new constraints in the Paleogene geodynamic reconstruction throughout the western Tethys.Research was supported by Urbino University found (responsible F. Guerrera), CGL2009-09249, CGL2011-30153-CO2-02 and CGL2012-32169 research projects (Spanish Ministry of Education and Science) and by Research Groups and projects of the Generalitat Valenciana from Alicante University (CTMA-IGA), and Junta de Andalucía (RNM-146)
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