177 research outputs found

    Evolución del espacio natural de la cabecera de las Lagunas de Ruidera siglos XVIII y XIX) a partir de la cartografía (Albacete, España)

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    En este trabajo se aborda el análisis de las variaciones experimentadas tanto en los vasos lacustres, como en las vertientes y orillas del tramo superior del sistema fluvio-lacustre de Ruidera a lo largo de los siglos XVIII y XIX. Este paraje, conforma uno de los conjuntos de lagunas más bellos y espectaculares de Europa. Se emplaza entre las provincias de Albacete y Ciudad Real, en la Comunidad autónoma de Castilla-La Mancha, y forma parte de la Demarcación del río Guadiana. El seguimiento de esta evolución se ha apoyado en el examen diacrónico de diferentes conjuntos cartográficos elaborados a lo largo de ambas centurias, así como de múltiples fuentes documentales, numerosas obras bibliográficas y el reconocimiento de campoThe aim of this work is the analysis of the variations in the upper section of the fluviolacustrine system of Lagunas de Ruidera-Ruidera´s Lakes- (Spain) in the eighteenth and nineteenth centuries: in their vessels, slopes and banks. Monitoring of these developments has been supported by the diachronic examination of different cartographic elaborate sets over two centuries, and multiple document sources, numerous literature works and field reconnaissance. This place, forms one of the most beautiful sets and spectacular lakes in Europe. It is located between the provinces of Albacete and Ciudad Real, in the autonomous community of Castilla-La Mancha, and is part of the Demarcation of the Guadiana rive

    Enzymatic method of producing 4-O- β-D-galactopyranosyl-D-xylose, 4-O- β-D-galactopyranosyl-D-xylose obtained using said method, compositions containing said and the use thereof in evaluating intestinal lactase

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    Filing Date: 2002-06-14.-- Priority Data: ES 200101419 (2001-06-18).-- International Publication Number: WO_2002103038 (20021227).An enzymatic process to obtain 4-O-β-D-galactopyranosyl-D-xylose useful in compositions or solutions in the in vivo evaluation of intestinal lactose activity in humans, that comprises the steps of preparing a reaction mixture of D-xylose, a β-D-galactopyranoside and a reaction medium that comprises water buffered to a pH between 5.0 and 9.0; adding 10 to 1,000 units of β-D-galactosidase per gram of β-D-galactopyranoside; subjecting the reaction mixture to a reaction or a temperature between a temperature higher than the freezing point of the reaction mixture and 45ºC, for 2 to 48 hours; for the reaction by deactivation of the β-D-galactosidase; and to isolate and crystallize the fractions that contain 4-O-β-D-galactopyranosyl-D-xylose from a crystallization mixture selected between mixtures of acetone/methanol in a ratio between 5/1 to 20/1 and mixtures of acetone/water in a ratio between 5/1 to 20/1

    Critical Theory and the Loneliness of the Tax Prof

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    This essay, prepared for a symposium on critical theory and tax law, has two goals: to suggest why feminist theory and critical race theory are spreading in taxation and to discuss some dangers of that criticism. The author evaluates three examples of the new criticism: an article on critical race theory by Professors Moran and Whitford; an article on feminist statutory interpretation by Professor Handelman; and a book, Taxing Women, by Professor McCaffery

    Wide Area RTK: a satellite navigation system based on precise real-time ionospheric modelling

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    The Wide Area Real Time Kinematic (WARTK) is an augmentation system concept for multi-frequency users based on precise real-time ionospheric modeling. It is able to provide a high accuracy and integrity GNSS positioning service over continental areas using the infrastructure of a network of permanent ground monitor stations, such as the European Geostationary Navigation Overlay Service (EGNOS) network of Ranging and Integrity Monitoring Stations (RIMS) in Europe. In this way, it allows an additional benefit to be obtained from these reference stations, that is, the network has the potential to support two independent systems: a satellite-based augmentation system, such as EGNOS, and a high-precision positioning service, based on WARTK. Indeed, thanks to the accuracy of the ionospheric corrections provided, WARTK users have available in real-time an extra constraint per satellite between the carrier phase ambiguities, which helps solve them quickly. Once such ambiguities have been solved, the GNSS user obtains navigation accurate to within 20 cm at the 95th percentile (about 10 cm RMS). Moreover, this precise positioning is achieved in a few minutes (with two frequency signals) or in a single epoch, after initial convergence of the tropospheric delay (with three frequency signals), even up to hundreds of kilometers away from the nearest reference station. While previous WARTK research has been devoted to implementing the concept and assessing its feasibility, considering in particular the accuracy achievable, the work reported in this paper focused on consolidating the results by analyzing a large and representative data set, and on deeper analysis of the integrity issue. It was carried out in the context of the Multi-constellation Regional System (MRS) project, within the European Space Agency GNSS Evolution Programme, with the aim of designing a high accuracy service for GPS and/or Galileo. Three months of actual data, from more than 25 permanent GPS stations in Europe, have been processed (some of them as a roving user), for high-, mid- and low-solar cycle conditions (in 2002, 2004 and 2006 respectively). In addition, several ionospheric storms occurred during the selected periods, with Dst values reaching up to −150 nT. Results based on these data show that user domain integrity was maintained for baselines of up to 400 km. At the 95th percentile, the daily horizontal and vertical position errors were 20 and 30 cm, respectively, and the corresponding protection levels were about 1 and 2 m. The convergence time was around 5 minutes with actual GPS constellation data. The benefits of using a multi-constellation system were also studied, with simulated GPS and three-frequency Galileo data, showing that it is possible to reduce the convergence time to a few seconds.Postprint (published version

    Effectiveness of the Natura 2000 network in protecting Iberian endemic fauna

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    The Iberian Peninsula is a major European region of biodiversity, as it harbours more than 30% of European endemic species. Despite a number of studies having evaluated the ability of nature reserves to protect certain taxa, there is still a lack of knowledge on how Iberian endemic fauna are represented in these reserves. We detected biodiversity hotspots of Iberian endemicity and evaluated the effectiveness of the Natura 2000 network (N2000) in representing 249 endemic species from eight animal taxonomic groups (amphibians, mammals, freshwater fishes, reptiles, water beetles, butterflies, lacewings and dung beetles). We found that only the 10% of these Iberian endemic species are considered species of community interest (i.e. species included in the Annexes of the Habitats Directive). We conducted gap analyses and null models of representativeness in N2000. Generally, N2000 is effective in its representation of Iberian endemic fauna, although we detected species and few hotspots of endemism that were still not represented. It is necessary to declare a few new protected areas, thus enhancing N2000's effectiveness in the conservation of the Iberian endemic fauna. Although the aim of N2000 is to protect species listed in the Birds and Habitats Directives, the conservation status of endemic species from one of the most important areas of Europe in terms of biodiversity, could be also a concern for the European Union. Our results are useful in the context of the recent European Commission mandate calling for a ‘fitness check’ of the Birds and Habitats Directives. This approach could be also applicable to other regions with high value of endemicity.DS‐F was supported by a post‐doctoral contract funded by Universidad de Castilla‐La Mancha and the European Social Fund (ESF). PA was supported by a ‘Ramón y Cajal’ contract (RYC‐2011‐07670, MINECO). This research was partially funded by project POII11‐0277‐5747 (Junta de Castilla‐La Mancha).Peer Reviewe

    c-Src functionality controls self-renewal and glucose metabolism in MCF7 breast cancer stem cells

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    Deregulation of Src kinases is associated with cancer. We previously showed that SrcDN conditional expression in MCF7 cells reduces tumorigenesis and causes tumor regression in mice. However, it remained unclear whether SrcDN affected breast cancer stem cell functionality or it reduced tumor mass. Here, we address this question by isolating an enriched population of Breast Cancer Stem Cells (BCSCs) from MCF7 cells with inducible expression of SrcDN. Induction of SrcDN inhibited self-renewal, and stem-cell marker expression (Nanog, Oct3-4, ALDH1, CD44). Quantitative proteomic analyses of mammospheres from MCF7-Tet-On-SrcDN cells (data are available via ProteomeXchange with identifier PXD017789, project DOI: 10.6019/PXD017789) and subsequent GSEA showed that SrcDN expression inhibited glycolysis. Indeed, induction of SrcDN inhibited expression and activity of hexokinase, pyruvate kinase and lactate dehydrogenase, resulting in diminished glucose consumption and lactate production, which restricted Warburg effect. Thus, c-Src functionality is important for breast cancer stem cell maintenance and renewal, and stem cell transcription factor expression, effects linked to glucose metabolism reduction.This work has been supported by grand SAF2016–75991-R (MINECO, AEI/FEDER, UE) to Jorge Martín-Pérez and ISCIII [grand PI 16/00789] to Miguel Ángel Fernández-Moreno. Víctor Mayoral-Varo was supported by the grand SAF2016–75991-R (MINECO, AEI/FEDER, UE). We acknowledge support for publication fee by the CSIC Open Access Publication Support Initiative through its Unit for Information Resources for Research (URICI)

    Optimizing automatic morphological classification of galaxies with machine learning and deep learning using Dark Energy Survey imaging

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    There are several supervised machine learning methods used for the application of automated morphological classification of galaxies; however, there has not yet been a clear comparison of these different methods using imaging data, or a investigation for maximising their effectiveness.We carry out a comparison between several common machine learning methods for galaxy classification (Convolutional Neural Network (CNN), K-nearest neighbour, LogisticRegression, Support Vector Machine, Random Forest, and Neural Networks) by using DarkEnergy Survey (DES) data combined with visual classifications from the Galaxy Zoo 1 project(GZ1). Our goal is to determine the optimal machine learning methods when using imaging data for galaxy classification. We show that CNN is the most successful method of these ten methods in our study. Using a sample of _2,800 galaxies with visual classification from GZ1, we reach an accuracy of _0.99 for the morphological classification of Ellipticals and Spirals. The further investigation of the galaxies that have a different ML and visual classification but with high predicted probabilities in our CNN usually reveals an the incorrect classification provided by GZ1. We further find the galaxies having a low probability of being either spirals or ellipticals are visually Lenticulars (S0), demonstrating that supervised learning is able to rediscover that this class of galaxy is distinct from both Es and Spirals.We confirm that _2.5% galaxies are misclassified by GZ1 in our study. After correcting these galaxies’ labels, we improve our CNN performance to an average accuracy of over 0.99 (accuracy of 0.994 is our best result)
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