Las imágenes de la historia en la obra de Stanley Kubrick.

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Control of a robotic arm for transporting objects based on neuro-fuzzy learning visual information

[Abstract] New applications related to robotic manipulation or transportation tasks, with or without physical grasping are being developed. To perform these activities di erent kind of perceptions are need. One of the key perceptions in robotics is vision. However, camera-based systems have inherent errors which a ect the quality of the information obtained. Image distortion slows down information processing and defers data availability to last processing stages, decreasing performance. In this paper, a new approach to correct diverse sources of visual distortions on images in early stages of the data processing is proposed. The goal of the proposed system/algorithm is the computation of the tilt angle of an object transported by a robot. After capturing the image, the computing system extracts the angle using a Fuzzy Filter that corrects all distortions at only one processing step. This filter has been developed by means of Neuro-Fuzzy learning techniques, using data obtained from real experiments. In this way, computing time can be decreased and the performance of the robotic application can be increased. The resulting algorithm has been tried out experimentally in robot transportation tasks in the humanoid robot TEO (Task Environment Operator).Ministerio de Economía y Competitividad; DPI2013-47944-C4-1-RComunidad de Madrid; S2013/MIT-274

Los estilos educativos de los padres y la competencia psicosocial de los adolescentes

This study examined the relationship between parenting styles and adolescents' psychosocial competence. Parents of 372 students between 11 and 15 years old were classified according to the student perception in four groups: pemissive, authoritative, authoritarian and neglectful. Several aspects related to the students' psychosocial competence were assessed through self-report measures. Results showed that both adolescents perceiving their parents as permissive and adolescents perceiving their parents as authoritative obtained the highest scores in perceived social competence and self-esteem. Moreover, their behavior in the classroom was more positive, and they were less rejected by their  classmates. These jindings are discussed in tems of the dimensions of acceptance and control underlying rhe various parenting styles.Este estudio analiza las relaciones entre los estilos educativos de los padres y algunas variables relacionadas con la competencia psicosocial de los adolescentes. Para ello se clasificó a los padres de 372 estudiantes de 11 a 15 años en cuatro grupos: permisivos, democráticos, autoritariose indiferentes. Los estudiantes cumplimentaron autoinformespara evaluar distintos aspectos relacionados con su competencia psicosocial. Los resultados indican que los adolescentes que consideran a sus padres como permisivos o democráticos obtienen puntuaciones más altas en sus percepciones de competencia social y en autoestima. Sus profesores consideran que su conducta en clase es más positiva, y reciben menos rechazo de sus cornpañeros. Estos resultados se discuten considerando las dimensiones de afecto y control que subyacen a los distintos estilos educativosde los padres

Evaluation of effectiveness of silicoorganic treatments using hydric properties

14 páginas, 1 tablaIn this work, the effectiveness of silicoorganic treatments for the consolidation, with or without waterproofing, of silicified stones (one conglomerate and four sandstones) from Zamora is analyzed, provided that these treatments are applied in the same way. Changes in the following properties have been monitored: total and free porosity, real and apparent density, absorption coefficient, imbibition coefficient, and capillary absorption coefficient. These intrinsic stone properties and the treatments employed have a significant effect on changes in these variables and lead to differences in the transport of fluid in the stone. This is the first time that the Canonical Biplot has been applied to this type of data to determine the control of the effectiveness of silicoorganic treatments applied to rocks. It was observed that the double action treatment RC80, which includes both waterproofing and consolidating, is more effective than the consolidating treatment RC70.The authors are grateful for financial support for this work from the Ministry of Education and Science (CGL2007-62168BET and FEDER funds) and Ministry of Science, Innovation (MAT2010-20660) and Ministry of Science, Innovation and Universities (PGC2018-098151-B-100).Peer reviewe

Consistency of cosmic shear analyses in harmonic and real space

Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UA

The first Hubble diagram and cosmological constraints using superluminous supernovae

Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UA

Mechanical Behaviour of Air-plasma Sprayed Functionally Graded YSZ-Mullite Environmental Barrier Coatings: A Study via Instrumented Indentation

6 páginas, 7 figuras, 1 tabla.-- Comunicación presentada al 33th International Thermal Spray Conference & Exposition 2010; Thermal Spray: Global Solutions for Future Applications.-- et al.Mullite (Al6Si2O13) is the basis of efficient environmental barrier coatings (EBCs) for protecting Si-based ceramic matrix composites (CMCs) selected to replace specific hot-section metallic components in advanced gas turbines. Furthermore, YSZ-mullite multilayer architectures with compositional grading between the bond coat and YSZ top coat were envisioned as solutions to ease their coefficient of thermal expansion (CTE) mismatch induced stress. Consequently, a proper understanding of the mechanical properties such as the elastic modulus, hardness or plastic/elastic recovery work serve for an efficient design of such refractory oxide multilayers. In this work, three different mullite powder morphologies (fused and crushed, spray-dried and freeze-granulated) were employed. Using depth-sensing indentation with loads in the range 100 – 500 mN, the role of the microstructure and morphology of the powder feedstock on the mechanical behaviour of air plasma sprayed mullite bond coats deposited on SiC Hexoloy substrates was investigated. Fully crystalline as-sprayed mullite coatings were engineered under controlled deposition conditions. Mechanical properties were measured for the as-sprayed coatings as well as for coatings heat-treated at 1300oC, in water vapour environment, for periods up to 500 h. Both E and H values of the coatings are found to be highly dependent on the morphology of the starting powders.This work has been supported by NRC-CSIC program (project 2007CA003).Peer reviewe

The role of temperature in the magnetic irreversibility of type-I Pb superconductors

Evidence of how temperature takes part in the magnetic irreversibility in the intermediate state of a cylinder and various disks of pure type-I superconducting lead is presented. Isothermal measurements of first magnetization curves and magnetic hysteresis cycles are analyzed in a reduced representation that defines an equilibrium state for flux penetration in all the samples and reveals that flux expulsion depends on temperature in the disks but not in the cylinder. The magnetic field at which irreversibility sets in along the descending branch of the hysteresis cycle and the remnant magnetization at zero field are found to decrease with temperature in the disks. The contributions to irreversibility of the geometrical barrier and the energy minima associated to stress defects that act as pinning centers on normal-superconductor interfaces are discussed. The differences observed among the disks are ascribed to the diverse nature of the stress defects in each sample. The pinning barriers are suggested to decrease with the magnetic field to account for these results

A Critical Review of the Application of Electrochemical Techniques for Studying Corrosion of Mg and Mg Alloys: Opportunities and Challenges

In order to elucidate the corrosion mechanism of Magnesium (Mg), assess its corrosion rate and evaluate the viability of effective corrosion protection methods, a number of different and complementary techniques are required. Aqueous corrosion is, in nature, an electrochemical process and as such electrochemical methods represent a powerful tool for the study of Mg corrosion. In this chapter the main electrochemical techniques used to study the corrosion of Mg are reviewed along with other simple non-electrochemical methods such as weight loss and hydrogen evolution measurements. The electrochemical techniques covered in this review include conventional DC and AC electrochemical techniques and the latest advances in local electrochemical methods for the evaluation and characterization of Mg corrosion. Each technique presented will be discussed, and its major advantages and drawbacks for the study of Mg corrosion will be commented. Applications range from studies of influence of the impurities in catalytic activity of high purity Mg towards hydrogen evolution, the determination of corrosion rate for Mg and Mg alloys by electrochemical methods and electrochemical study of sol-gel films as pre-treatment for Mg alloys

Dark Energy Survey Year 3 results: A 2.7% measurement of baryon acoustic oscillation distance scale at redshift 0.835

Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UAMWe present angular diameter measurements obtained by measuring the position of baryon acoustic oscillations (BAO) in an optimized sample of galaxies from the first three years of Dark Energy Survey data (DES Y3). The sample consists of 7 million galaxies distributed over a footprint of 4100 deg2 with 0.6 < zphoto < 1.1 and a typical redshift uncertainty of 0.03 (1 + z). The sample selection is the same as in the BAO measurement with the first year of DES data, but the analysis presented here uses three times the area, extends to higher redshift, and makes a number of improvements, including a fully analytical BAO template, the use of covariances from both theory and simulations, and an extensive preunblinding protocol. We used two different statistics; angular correlation function and power spectrum, and validate our pipeline with an ensemble of over 1500 realistic simulations. Both statistics yield compatible results. We combine the likelihoods derived from angular correlations and spherical harmonics to constrain the ratio of comoving angular diameter distance DM at the effective redshift of our sample to the sound horizon scale at the drag epoch. We obtain DM(zeff = 0.835)/rd = 18.92 ± 0.51, which is consistent with, but smaller than, the Planck prediction assuming flat ΛCDM, at the level of 2.3σ. The analysis was performed blind and is robust to changes in a number of analysis choices. It represents the most precise BAO distance measurement from imaging data to date, and is competitive with the latest transverse ones from spectroscopic samples at z > 0.75. When combined with DES 3x2pt þ SNIa, they lead to improvements in H0 and Ωm constraints by ∼20