955 research outputs found
PREFACE: The Milky Way Unravelled by Gaia: GREAT Science from the Gaia Data Releases
International audiencePREFAC
EstimaciĂł de construccions compromeses per la presĂšncia de coves en el litoral del sud i llevant de Mallorca mitjançant lâĂșs de Sistemes dâInformaciĂł GeogrĂ fica (SIGs)
[cat] Sâexposen els resultats estimats de lâextensiĂł de construccions (habitatges) i infraestructures construĂŻdes sobre quatre cavitats cĂ rstiques a la franja litoral del Sud i Llevant de Mallorca a partir de lâĂșs de Sistemes dâInformaciĂł GeogrĂ fica (SIGs). Lâestudi sâha basat en lâanĂ lisi cartogrĂ fic en el que sâha contrastat la cartografia existent del recorregut de les coves, el mapa topogrĂ fic digital a escala 1/5.000, diverses col·leccions de fotografies aĂšries i la cartografia digital del cadastre. La informaciĂł manejada es troba disponible al visor cartogrĂ fic del Servei dâInformaciĂł Territorial de les Illes Balears S.A. i es pot visualitzar a qualsevol programa de SIG. La cartografia corresponent al recorregut de les cavitats es troba a les publicacions de la revista Endins, tambĂ© disponibles a internet. Els resultat es una estimaciĂł dels metres quadrats construĂŻts sobre les coves. Dâaquesta manera sâofereix una informaciĂł que podria esser una eina de consulta per a la presa de decisions i contribuir a la sostenibilitat de la zona costanera dâacord amb una concepciĂł integrada de les Ă rees costeres i marines.[eng] This work exposes the estimated results of the built area (homes and infrastructures) above four karstic caves located at the coastal fringe in the South and East of the Mallorca Island using Geographical Information Systems (GIS). The study has been based on the analysis of the cartography of the path/extension of the caves, 1/5.000 scale topographic maps, many collections of digital aerial photography and the cartography of the cadastre. The information managed is available in the map viewer of the Geographical Information Service of the Balearic Islands and can be displayed in any GIS program. Cartography of the paths of the caves are in the issues of Endins Journal, also available in internet. The result is an estimation of the square meters built above the caves. In this way, we offer a kind of information that could be a decision support tool to contribute to the sustainability of the coastal zone according with the concept of integrity of coastal and marine areas
IntroducciĂłn al estudio de las comunidades de oligoquetos acuĂĄticos del rĂo Turia (Teruel-Valencia, España)
Retos del Departamento de CardiologĂa
En los Ășltimos años la cardiologĂa ha experimentado enormes avances a nivel mundial. Las imĂĄgenes cardĂacas nos dan diagnĂłsticos cada vez mĂĄs exactos; los procedimientos invasivos en enfermedad coronaria, enfermedad cardĂaca estructural y arritmias cardĂacas nos permiten acceder a tratamientos que hasta hace algĂșn tiempo eran imposibles o, en todo caso, sumamente complicados. La prevenciĂłn y la rehabilitaciĂłn se han hecho parte de la prĂĄctica habitual. Del mismo modo, los progresos a nivel de los medicamentos dan a nuestros pacientes mĂĄs años de vida y de mejor calidad
A Multiinstitutional Spanish Masterâs Program in Ecosystem Restoration: Vision and Four-Year Experience
Since 2006, an innovative, multiinstitutional Spanish Master in Ecosystem Restoration (MER) is jointly offered by four major public universities in Madrid. In view of the high student demandâabout 900 applications this academic year for only 30 places, a remarkable 75% rate of professional poststudy employment in a period of economic crisis, and the high number (> 40) of prestigious organizations involved in the program, we consider the MER program, although still young, to be very promising for the long term. We explain the process to create the MER and achieve the results obtained thus far. We describe its organization, report its vital statistics in terms of students, and identify some strengths and weaknesses observed to date. The MER program has evolved as a network of knowledge and experience that links universities, lecturers, researchers, students, private and public companies, NGOs, and administration centers. Our aim is to help other groups that may want to launch similar graduate-level ecological restoration degree programs
Qualification and Start of Production of the Ultrasonic Welding Machines for the LHC Interconnections
The Large Hadron Collider (LHC) is presently under installation at CERN, Geneva. The approximately 4000 superconducting corrector magnets required by the machine are powered through copper-stabilized Nb-Ti busbars. To interconnect the magnets along the machine, about 50ĂÂ 000 joints between superconducting cables rated at 600 A have to be performed in-situ during the interconnection activities. An ultrasonic welding technique has been developed and optimised by CERN which led to the development of a dedicated machine which was qualified during the assembly of the STRING II, a 110-m chain of cryomagnets assembled as a prototype of the LHC. The realization of the Ăą series Ăą interconnections together with the procurement of the tooling based on functional specifications have been contracted to a consortium of firms. Qualification tests and acceptance criteria in terms of electrical contact resistance, mechanical resistance, reliability and reproducibility have been defined by CERN. This paper presents the tests and some results of the qualification process relevant to the industrialized tooling provided by the contractor. Results of pre-series junctions done in the LHC tunnel are presented together with the perspective for the continuation of the work
Can we identify non-stationary dynamics of trial-to-trial variability?"
Identifying sources of the apparent variability in non-stationary scenarios is a fundamental problem in many biological data analysis settings. For instance, neurophysiological responses to the same task often vary from each repetition of the same experiment (trial) to the next. The origin and functional role of this observed variability is one of the fundamental questions in neuroscience. The nature of such trial-to-trial dynamics however remains largely elusive to current data analysis approaches. A range of strategies have been proposed in modalities such as electro-encephalography but gaining a fundamental insight into latent sources of trial-to-trial variability in neural recordings is still a major challenge. In this paper, we present a proof-of-concept study to the analysis of trial-to-trial variability dynamics founded on non-autonomous dynamical systems. At this initial stage, we evaluate the capacity of a simple statistic based on the behaviour of trajectories in classification settings, the trajectory coherence, in order to identify trial-to-trial dynamics. First, we derive the conditions leading to observable changes in datasets generated by a compact dynamical system (the Duffing equation). This canonical system plays the role of a ubiquitous model of non-stationary supervised classification problems. Second, we estimate the coherence of class-trajectories in empirically reconstructed space of system states. We show how this analysis can discern variations attributable to non-autonomous deterministic processes from stochastic fluctuations. The analyses are benchmarked using simulated and two different real datasets which have been shown to exhibit attractor dynamics. As an illustrative example, we focused on the analysis of the rat's frontal cortex ensemble dynamics during a decision-making task. Results suggest that, in line with recent hypotheses, rather than internal noise, it is the deterministic trend which most likely underlies the observed trial-to-trial variability. Thus, the empirical tool developed within this study potentially allows us to infer the source of variability in in-vivo neural recordings
Catalytic surface promotion of highly active La0.85Sr0.15Cr0.8Ni0.2O3-delta anodes for La5.6WO11.4-delta based proton conducting fuel cells
[EN] La0.85Sr0.15CrO3-delta (LSC), La0.85Sr0.15Cr0.8Ni0.2O3-delta (LSCN) and LSCN infiltrated with Ni nanoparticles were tested as anodes for symmetrical cells based on La5.6WO11.4-delta (LWO) protonic electrolyte. These chromite-based electrode materials are compatible with LWO material, in contrast to the widely used NiO. Under typical anode reducing conditions, Ni is segregated from the LSCN lattice on the grain surface as metallic Ni nanoparticles, which are proved to be compatible with LWO in reducing conditions. These Ni nanoparticles become the catalytic active sites for the H-2 oxidation reaction in proton conducing anodes and the electrode performance is substantially improved regarding to pure LSC. Ni nanoparticle infiltration further improves the catalytic promotion of the anode, reducing the polarization resistance (R-p) previously limited by low frequency surface related processes. Indeed, the R-p, values achieved for LSCN infiltrated with Ni, e.g. 0.47 Omega cm(2) at 700 degrees C, suggest the practical application of this kind of anodes in proton conducting solid oxide fuel cells (PC-SOFC). (C) 2013 Elsevier B.V. All rights reserved.Funding from European Union (FP7 Project EFFIPRO - Grant Agreement 227560), the Spanish Government (ENE2011-24761, SEV-2012-0267 and CSIC Intramural 2008801093 grants) is kindly acknowledged. The authors thank M. Fabuel for sample preparation.Solis DĂaz, C.; Balaguer Ramirez, M.; Bozza, F.; Bonanos, N.; Serra Alfaro, JM. (2014). Catalytic surface promotion of highly active La0.85Sr0.15Cr0.8Ni0.2O3-delta anodes for La5.6WO11.4-delta based proton conducting fuel cells. Applied Catalysis B Environmental. 147:203-207. https://doi.org/10.1016/j.apcatb.2013.08.04420320714
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