Infrared gluons, intrinsic transverse momentum and rising total cross-sections

We discuss the infrared limit for soft gluon kt-resummation and relate it to physical observables such as the intrinsic transverse momentum and the high energy limit of total cross-sections.Comment: 8 pages, 6 figures, Presented at Hadron Structure '09, Tatranska Strba, September 2009, Slovacchia, to be published in the Conference Proceeding

Asymptotic behavior of the Navier-Stokes system in a thin domain with Navier condition on a slightly rough boundary

We study the asymptotic behavior of the solutions of the Navier–Stokes system in a thin domain Ωε of thickness ε satisfying the Navier boundary condition on a periodic rough set Γε ⊂ ∂Ωε of period rε and amplitude δε, with δε rε ε. We prove that the limit behavior as ε goes to zero depends on the limit λ of δεε 1 2 /r 3 2 ε . Namely, if λ = +∞, the roughness is so strong that the fluid behaves as if we had imposed the adherence condition on Γε. If λ = 0, the roughness is too weak and the fluid behaves as if Γε were a plane. Finally, if λ ∈ (0, +∞), the roughness is strong enough to make a new friction term appear in the limit.Ministerio de Economía y Competitividad (España) MTM2011- 24457Junta de Andalucía FQM30

On the Navier boundary condition for viscous fluids in rough domains

In this paper we review some recent results concerning the study of the asymptotic behavior of viscous fluids in rough domains assuming Navier boundary conditions on the rough boundary. Our main interest is to study the relation between both the adherence and the Navier boundary conditions in the case of a boundary with weak rugosities. We show that the roughness acts on the fluid as a friction term. In particular, if the roughness is sufficiently strong, Navier condition implies adherence condition. This generalizes previous results of other authors.Ministerio de Ciencia e InnovaciónJunta de Andalucí

Soft Gluon kt-Resummation and the Froissart bound

We study soft gluon kt-resummation and the relevance of zero momentum gluons for the energy dependence of total hadronic cross-sections. We discuss a model in which consistency of the energy dependence of the cross-section with the limitation of the Froissart bound, is directly related to the behaviour of the strong coupling constant in the infrared region. Our predictions for the asymptotic behaviour are shown to be related to the ansatz that the infrared behaviour of the QCD strong coupling constant follows an inverse power law.Comment: To be published in Physics Letters B. This version is 25% shorter than the previous one, as requested by the restrictions on the number of pages for this Journal. Some equations have been skipped, some text has been summarized. The earliest version may be useful for a better understanding of some of the materia

Total cross-section and rapidity gap survival probability at the LHC through an eikonal with soft gluon resummation

New results are presented for total ${\rm pp}/ {\rm \bar p p}$ cross-sections, in the framework of our QCD based model (GGPS). This is an improved eikonal mini-jet model, where soft gluon radiation tames the fast energy rise normally present in mini-jet models. We discuss the variability in our predictions and provide a handy parametrization of our results for the LHC. We find that our model predictions span the range $\sigma_{tot}^{LHC}=100 ^{+10}_{-13} mb$. While this matches nicely with the range of most other models, it does not agree with recent ones which include a "hard" Pomeron, even though our model does include hard scattering. We compute the survival probability for Large Rapidity Gap (LRG) events at the LHC and at the Tevatron. These events are relevant, for example, for Higgs signal in the $WW$ fusion process. We also explore whether measurements of the total cross-sections at the LHC can help us sharpen the model parameters and hence estimates for these survival probabilities, further.Comment: 15 pages, 3 figures, LaTe

RODI: Benchmarking Relational-to-Ontology Mapping Generation Quality

Accessing and utilizing enterprise or Web data that is scattered across multiple data sources is an important task for both applications and users. Ontology-based data integration, where an ontology mediates between the raw data and its consumers, is a promising approach to facilitate such scenarios. This approach crucially relies on useful mappings to relate the ontology and the data, the latter being typically stored in relational databases. A number of systems to support the construction of such mappings have recently been developed. A generic and effective benchmark for reliable and comparable evaluation of the practical utility of such systems would make an important contribution to the development of ontology-based data integration systems and their application in practice. We have proposed such a benchmark, called RODI. In this paper, we present a new version of RODI, which significantly extends our previous benchmark, and we evaluate various systems with it. RODI includes test scenarios from the domains of scientific conferences, geographical data, and oil and gas exploration. Scenarios are constituted of databases, ontologies, and queries to test expected results. Systems that compute relational-to-ontology mappings can be evaluated using RODI by checking how well they can handle various features of relational schemas and ontologies, and how well the computed mappings work for query answering. Using RODI, we conducted a comprehensive evaluation of seven systems

Fluide visqueux dans un domaine de faible épaisseur vérifiant la condition de glissement sur une frontière lègèrement rugueuse

We consider a viscous fluid of small height ε on a periodic rough bottom Γε of period rε and amplitude δε, δε rε ε, where we impose the slip boundary condition. When ε tends to zero we obtain a Reynolds system depending on the limit λ of (δε √ε )/(rε √rε ). If λ = +∞, the fluid behaves as if we would impose the adherence condition on Γε. This justifies why this is the usual boundary condition for viscous fluids. If λ = 0 the fluid behaves as if Γε was plane. Finally, for λ ∈ (0,+∞) it behaves as if Γε was flat but with a higher friction coefficient.On considère un fluide visqueux de faible épaisseur ε sur un fond rugueux Γε, périodique de période rε et amplitude δε, δε rε ε, où on impose la condition de glissement. Quand ε converge vers zéro on obtient un système de type Reynolds qui dépend de la limite λ de (δε √ε )/(rε √rε ). Si λ = +∞, le fluide se comporte comme si on aurait imposé la condition d’adhérence sur Γε. Ceci justifie la condition usuelle pour un fluide visqueux. Si λ = 0 le fluide se comporte comme si Γε était plate. Enfin, pour λ ∈ (0,+∞), tout se passe comme si Γε était plate, mais avec un coefficient de frottement plus élevé

Insomnia Symptoms in Patients With Substance Use Disorders During Detoxification and Associated Clinical Features

Background: Insomnia is highly prevalent in patients with substance use disorders (SUD), and it has been related to a worse course of addiction. Insomnia during detoxification in a hospital has not been adequately studied. This study aims to compare sociodemographic, clinical, and psychopathological characteristics of SUD patients undergoing a detoxification program, by comorbidity and insomnia symptoms. Methodology: We recruited 481 patients who received pharmacological and psychotherapeutic treatment for detoxification. They were evaluated through semi-structured interviews, standardized questionnaires, and a specific sleep log. A bivariate and multivariate analysis of the data was performed. Results: Insomnia was reported by 66.5% patients, with sleep-maintenance insomnia the most frequent issue, followed by early morning awakening and sleep-onset insomnia. Patients with alcohol use disorder and cannabis use disorder had higher prevalence of sleep-onset insomnia. Patients with cocaine and heroin use disorder had higher prevalence of sleep-maintenance insomnia. Independent factors that allowed the identification of insomnia symptoms included being female (OR: 3.43), polysubstance use (OR: 2.85), comorbid anxiety disorder (OR: 2.02), and prior admission for detoxification (OR: 1.22). Conclusions: Insomnia symptoms are very prevalent in patients admitted for detoxification. The diagnosis and therapeutic strategies for the insomnia symptoms should be improved, especially in women and in patients with greater addiction severity and with anxiety disorders

De los movimientos sociales a las ecologías de acción política

En las últimas décadas han proliferado diversos colectivos sociales y políticos cuyos modos de organización y acción se diistinguen de las clásicas maneras de la acción política al caracterizarse por formas de encuentro horizontales y en red. Estas transformaciones locales dialogan con una serie de acontecimientos que se han llevado a cabo a nivel mundial definidos por la toma del espacio público, una fuerte participación en redes sociales, pluralidad de consignas y la importancia radical de colocar en el centro el cuerpo en sus formas más diversas. A partir del análisis de estos acontecimientos y sus repercusiones en las nuevas formas de la acción colectiva, discutimos sobre la ampliación de los sentidos de la conceptualización de los movimientos sociales introduciendo la noción de ecologías de acción política, con la intención de dar cuenta de la emergencia de estas modalidades prácticas contemporáneas que se diferencian de los modos precedentes de la acción colectiva