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Santiago de Compostela, Spain

The University of Santiago de Compostela - USC is a public university located in the city of Santiago de Compostela, Galicia, Spain. A second campus is located in Lugo, Galicia. It is one of the world's oldest universities in continuous operation.The university traces its roots back to 1495, when a school was opened in Santiago. In 1504, Pope Julius II approved the foundation of a university in Santiago but "the bull for its creation was not granted by Clement VII until 1526". In 1555 the institute began to separate itself from strictly religious instruction with the help of Cardinal Juan Álvarez de Toledo and started to work towards developing other academic fields, including the emerging science fields.Today the university's facilities cover more than 1,300,000 square meters . In terms of human resources, the university has more than 2,000 teachers involved in study and research, over 42,000 students, and more than 1,000 people working in administration and services. Moreover, in 2009, the University received the accreditation of Campus of International Excellence by the Ministry of Education , recognising USC as one of the most prestigious universities in Spain.The university ranks 5th in Spain's best universities ranking by Complutense University of Madrid and IAIF and 4th amongst public universities. Wikipedia.

Ferreiro E.G.,University of Santiago de Compostela
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Year: 2015

Recent results from proton(deuteron)-nucleus collisions at RHIC and LHC energies have shown an unexpected suppression of excited quarkonium states as compared to their ground states. In particular, stronger suppression of the ψ(2. S) relative to the J/ψ has been detected. Similar observations were made at lower energies and were easily explained by nuclear absorption. At higher energies, a similar explanation would violate the Heisenberg principle, since the calculations based on the uncertainty principle lead to a charmonium formation time expected to be larger than the nuclear radius, which results in identical nuclear break-up probability for the ψ(2. S) and J/ψ. On the contrary, this behavior is naturally explained by the interactions of the quarkonium states with a comoving medium. We present our results on J/ψ and ψ(2. S) production for d. +. Au collisions at s=200 GeV and for p. +. Pb collisions at s=5.02 TeV. © 2015 The Author.

Baselga A.,University of Santiago de Compostela
Global Ecology and Biogeography | Year: 2010

Aim: Beta diversity (variation of the species composition of assemblages) may reflect two different phenomena, spatial species turnover and nestedness of assemblages, which result from two antithetic processes, namely species replacement and species loss, respectively. The aim of this paper is to provide a unified framework for the assessment of beta diversity, disentangling the contribution of spatial turnover and nestedness to beta-diversity patterns. Innovation: I derive an additive partitioning of beta diversity that provides the two separate components of spatial turnover and nestedness underlying the total amount of beta diversity. I propose two families of measures of beta diversity for pairwise and multiple-site situations. Each family comprises one measure accounting for all aspects of beta diversity, which is additively decomposed into two measures accounting for the pure spatial turnover and nestedness components, respectively. Finally, I provide a case study using European longhorn beetles to exemplify the relevance of disentangling spatial turnover and nestedness patterns. Main conclusion: Assigning the different beta-diversity patterns to their respective biological phenomena is essential for analysing the causality of the processes underlying biodiversity. Thus, the differentiation of the spatial turnover and nestedness components of beta diversity is crucial for our understanding of central biogeographic, ecological and conservation issues. © 2009 Blackwell Publishing Ltd.

Reboredo J.C.,University of Santiago de Compostela
Energy Economics | Year: 2011

This paper examines the dependence structure between crude oil benchmark prices using copulas. By considering several copula models with different conditional dependence structures and time-varying dependence parameters, we find evidence of significant symmetric upper and lower tail dependence between crude oil prices. These findings suggest that crude oil prices are linked with the same intensity during bull and bear markets, thus supporting the hypothesis that the oil market is 'one great pool'-in contrast with the hypothesis that states that the oil market is regionalized. Our findings on crude oil price co-movements also have implications for risk management, hedging strategies and asset pricing. © 2011 Elsevier B.V.

Ferreiro E.G.,University of Santiago de Compostela
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Year: 2014

We present our results on charmonium production at the Large Hadron Collider energies within the comover interaction model. The formalism includes both comover dissociation of J/ψ's and possible secondary J/ψ production through recombination. The estimation of this effect is made without involving free parameters. The comover interaction model also incorporates an analytic treatment of initial-state nuclear shadowing. With these tools, the model successfully describes the centrality, transverse momentum and rapidity dependence of the experimental data from PbPb collisions at the LHC energy of s=2.76 TeV. We present predictions for PbPb collisions at s=5.5 TeV. © 2014 Elsevier B.V.

Baselga A.,University of Santiago de Compostela
Global Ecology and Biogeography | Year: 2012

Aim Beta diversity can be partitioned into two components: dissimilarity due to species replacement and dissimilarity due to nestedness (Baselga, 2010, Global Ecology and Biogeography, 19, 134-143). Several contributions have challenged this approach or proposed alternative frameworks. Here, I review the concepts and methods used in these recent contributions, with the aim of clarifying: (1) the rationale behind the partitioning of beta diversity into species replacement and nestedness-resultant dissimilarity, (2) how, based on this rationale, numerators and denominators of indices have to match, and (3) how nestedness and nestedness-resultant dissimilarity are related but different concepts. Innovation The rationale behind measures of species replacement (turnover) dictates that the number of species that are replaced between sites (numerator of the index) has to be relativized with respect to the total number of species that could potentially be replaced (denominator). However, a recently proposed partition of Jaccard dissimilarity fails to do this. In consequence, this partition underestimates the contribution of species replacement and overestimates the contribution of richness differences to total dissimilarity. I show how Jaccard dissimilarity can be partitioned into meaningful turnover and nestedness components, and extend these new indices to multiple-site situations. Finally the concepts of nestedness and nestedness-resultant dissimilarity are discussed. Main conclusions Nestedness should be assessed using consistent measures that depend both on paired overlap and matrix filling, e.g. NODF, whereas beta-diversity patterns should be examined using measures that allow the total dissimilarity to be separated into the components of dissimilarity due to species replacement and dissimilarity due to nestedness. In the case of multiple-site dissimilarity patterns, averaged pairwise indices should never be used because the mean of the pairwise values is unable to accurately reflect the multiple-site attributes of dissimilarity. © 2012 Blackwell Publishing Ltd.

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