Recurrencia y tasa de supervivencia en el Alzacola (Cercotrichas galactotes)

S'analitzen les dades de captura-recaptura de 1123 cuaenlairats anellats al llarg de 10 anys en una localitat del sud d'Espanya. Es van recuperar un total de 73 ocells (6,5%) en anys posteriors. El nombre màxim d'anys entre la primera i l'última recuperació fou 6 anys. Els ocells adults (20,8%) es van recuperar més sovint que els immaturs (1,8%). La taxa de supervivència segons el model A del programa JOLLY fou de 0,57 (se=0,10, test de Goodness, Chi2=4,57, p=0,4694). Aquesta taxa no és significativament diferent d'altres calculades per a algunes espècies sedentàries. Això suggereix un alt grau de fidelitat a l'àrea de cria en aquesta espècie

An improved method for the identification of galaxy systems: Measuring the gravitational redshift by Dark Matter Haloes

We introduce a new method for the identification of galaxy systems in redshift surveys based on the halo model. This method is a modified version of the K-means identification algorithm developed by Yang et al (2005). We have calibrated and tested our algorithms using mock catalogs generated using the Millennium simulations (Springel et al. 2005) and applied them to the NYU-DR7 galaxy catalog (based on the SDSS datasets). Using this local sample of groups and clusters of galaxies we have measured the effect of gravitational redshift produced by their host dark matter haloes. Our results shows radial velocity decrements consistent with general relativity predictions and previous measurements by Wojtak et al (2011) in clusters of galaxies.Comment: Accepted for Publication in MNRAS Letters, 2 figures. arXiv admin note: text overlap with arXiv:astro-ph/0405234, arXiv:astro-ph/0406593 by other author

A comparison of BPMN 2.0 with other notations for manufacturing processes

In order to study their current practices and improve on them, manufacturing firms need to view their processes from several viewpoints at various abstraction levels. Several notations have been developed for this purpose, such as Value Stream Mappings or IDEF models. More recently, the BPMN 2.0 standard from the Object Management Group has been proposed for modeling business processes. A process organizes several activities (manual or automatic) into a single higher-level entity, which can be reused elsewhere in the organization. Its potential for standardizing business interactions is well-known, but there is little work on using BPMN 2.0 to model manufacturing processes. In this work some of the previous notations are outlined and BPMN 2.0 is positioned among them after discussing it in more depth. Some guidelines on using BPMN 2.0 for manufacturing are offered, and its advantages and disadvantages in comparison with the other notations are presented

Galaxy Morphological Segregation in Clusters: Local vs. Global Conditions

We study the relative fraction of galaxy morphological types in clusters, as a function of the projected local galaxy density and different global parameters: cluster projected gas density, cluster projected total mass density , and reduced clustercentric distance. Since local and global densities are correlated, we have considered different tests to search for the parameters to which segregation show the strongest dependence. Also, we have explored the results of our analysis applied to the central regions of the clusters and their outskirts. We consider a sample of clusters of galaxies with temperature estimates to derive the projected mass density profile and the 500 density contrast radius ($r_{500}$) using the NFW model and the scaling relation respectively. The X-ray surface brightness profiles are used to obtain the projected gas density assuming the hydrostatic equilibrium model. Our results suggest that the morphological segregation in clusters is controlled by the local galaxy density in the outskirts. On the other hand, the global projected mass density, shows the strongest correlation with the fraction of morphological types in the central high density region, with a marginal dependence on the local galaxy density.Comment: 10 pages, 8 figures, Accepted AJ (February 2001 issue

Inference of performance annotations in web service composition models

High-quality services must keep working reliably and efficiently, and service compositions are no exception. As they integrate several internal and external services over the network, they need to be carefully designed to meet their performance requirements. Current approaches assist developers in estimating whether the selected services can fulfill those requirements. However, they do not help developers define requirements for services lacking performance constraints and historical data. Manually estimating these constraints is a time-consuming process which might underestimate or overestimate the required performance, incurring in additional costs. This work presents the first version of two algorithms which infer the missing performance constraints from a service composition model. The algorithms are designed to spread equally the load across the composition according to the probability and frequency each service is invoked, and to check the consistency of the performance constraints of each service with those of the composition

Workflow and tools to track and visualize behavioural data from a Virtual Reality environment using a lightweight GIS

[EN] Evaluating user behaviour in Virtual Reality is a challenge for every re-searcher involved in designing and executing experiments in immersive envi-ronments. Behavioural information could lead to relevant findings in pres-ence, engagement or, for example, the mood of the player during a VR ex-perience. Saving this kind of information and exploding it in an appropriateway could lead researchers or even game designers to identify relevant be-havioural patterns or correlations. In this article, we are proposing a simple,replicable workflow and a set of scripted tools in order to acquire user¿s navi-gational data and visualize it using the inherent capabilities of a GeographicInformation System. Our workflow goes from data acquisition in Unity3Dwith C to the final representation in a map using Leaflet, an open-sourceGIS JavaScript based, passing through the pre-processing of XML files. Us-ing a GIS to visualize navigational data is a flexible, ecological and effectivesolution that improves productivity and awareness on data storytelling ca-pabilities.This work was supported by the Spanish Ministry of Science, Innovation and Universities funded project ATHENEA-DPI2017-91537-EXP and by the European Commission project RHUMBO H2020-MSCA-ITN-2018-813234.Soler-Domínguez, JL.; Contero, M.; Alcañiz Raya, ML. (2019). Workflow and tools to track and visualize behavioural data from a Virtual Reality environment using a lightweight GIS. SoftwareX. 10:1-6. https://doi.org/10.1016/j.softx.2019.100269S161

Measuring the dark matter equation of state

The nature of the dominant component of galaxies and clusters remains unknown. While the astrophysics community supports the cold dark matter (CDM) paradigm as a clue factor in the current cosmological model, no direct CDM detections have been performed. Faber and Visser 2006 have suggested a simple method for measuring the dark matter equation of state that combines kinematic and gravitational lensing data to test the widely adopted assumption of pressureless dark matter. Following this formalism, we have measured the dark matter equation of state for first time using improved techniques. We have found that the value of the equation of state parameter is consistent with pressureless dark matter within the errors. Nevertheless, the measured value is lower than expected because typically the masses determined with lensing are larger than those obtained through kinematic methods. We have tested our techniques using simulations and we have also analyzed possible sources of error that could invalidate or mimic our results. In the light of this result, we can now suggest that the understanding of the nature of dark matter requires a complete general relativistic analysis.Comment: 4 pages, 2 figures, accepted for publication in Monthly Notices of the Royal Astronomical Society Letters. Minor revision as suggested by refere

Low X-ray Luminosity Galaxy Clusters. III: Weak Lensing Mass Determination at 0.18 << z << 0.70

This is the third of a series of papers of low X-ray luminosity galaxy clusters. In this work we present the weak lensing analysis of eight clusters, based on observations obtained with the Gemini Multi-Object Spectrograph in the $g'$, $r'$ and $i'$ passbands. For this purpose, we have developed a pipeline for the lensing analysis of ground-based images and we have performed tests applied to simulated data. We have determined the masses of seven galaxy clusters, six of them measured for the first time. For the four clusters with availably spectroscopic data, we find a general agreement between the velocity dispersions obtained via weak lensing assuming a Singular Isothermal Sphere profile, and those obtained from the redshift distribution of member galaxies. The correlation between our weak lensing mass determinations and the X-ray luminosities are suitably fitted by other observations of the $M-L_{X}$ relation and models