Morocco at the European Neighbourhood Policy: The settlement of a privileged relationship

The current article analyses the EU–Morocco relationship in the framework of the European Neighbourhood Policy (ENP) during its first five years. The aim is to prove that Morocco has settled a privileged relationship with the EU due to its collaboration in the migration and security field. The paper analyses the unilateral European conception of the migration and security policy and its implementation within the bilateral framework of the ENP in the Euro-Moroccan relations. At the same time, the Moroccan strategies to consolidate the privileged relationship by cooperating in some fields and not in others are examinedEste artículo analiza las relaciones UE-Marruecos en el marco de la Política Europea de Vecindad (PEV) durante sus primeros cinco años. El objetivo es probar que durante este periodo Marruecos consiguió consolidar una relación privilegiada con la UE como consecuencia de su colaboración en los ámbitos de política migratoria y seguridad. El artículo analiza la concepción unilateral de la política migratoria y de seguridad por parte de la UE y aplicación dentro del marco bilateral de la PEV en el caso euro-marroquí. Igualmente, nos aproximaremos a las estrategias marroquíes con el fin de consolidar la relación de privilegio a través de la cooperación selectiva en ciertos ámbitos y no en otrosThis paper is part of the results of the research projects ‘The international dimension of the political transformations in the Arab-Islamic world’ (CSO2014-52998-C3-3-P L), financed by the Spanish Ministry of Economy and Competitiveness, and ‘Crisis and regimen change processes in the north of Africa. Implications for Spain’ (CSO2017-84949-C3-3-P), financed by the Spanish Ministry of Economy and Competitiveness, the Spanish National Agency for Research (AEI), and the European Regional Development Fund (ERDF

De la vida libre al biofilm y vuelta atrás

La alternancia entre un estilo de vida libre planctónico y la formación de comunidades estructuradas, altamente cooperativas y embebidas en una matriz polimérica, denominadas biofilms, es una característica central de la vida de las bacterias en el medio ambiente. La bacteria de suelo Pseduomonas putida es un organismo metabólicamente versátil que coloniza las raíces de las plantas, y ha sido propuesto como organismo modelo para el desarrollo de procesos biotecnológicos. El trabajo reciente de mi laboratorio se ha centrado en los procesos de regulación que ocurren durante la transición de la vida libre al biofilm y viceversa en Pseudomonas putida. Nuestro trabajo ha desvelado una red de regulación en la cual elementos reguladores globales y específicos interaccionan para cesar las funciones de movilidad características de la vida libre e iniciar el desarrollo del biofilm, y también para inducir la dispersión del biofilm y reiniciar la vida planctónica. En esta presentación mostraré evidencia de la implicación de los nucleótidos di-GMPc y ppGpp en estos procesos, y el papel de una amplia variedad de elementos reguladores en el establecimiento de una compleja red que coordina la transición ordenada entre estos dos estilos de vida en función de distintas señales fisiológicas y ambientales.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Defect of an extension, key polynomials and local uniformization

International audienceFor all simple and finite extension of a valued field, we prove that its defect is the product of the effective degrees of the complete set of key polynomials associated. As a consequence, we obtain a local uniformization theorem for valuations of rank 1 centered on an equicharacteristic quasi-excellent local domain satisfying some inductive assumptions of lack of defect

Role of stringent response in Pseudomonas putida biofilm dispersal

In natural environments bacteria predominantly exist as part of complex surface-associated communities known as biofilms. The study of biofilms has become an important topic in microbiology due to the deep impact they have in many important areas in society. Biofilms are structured polymeric matrix-encased communities of microorganisms associated to a surface or interphase, which provide bacteria with many different advantages in contrast to the planktonic lifestyle. Biofilm development is a cyclic process, including: attachment, proliferation, maturation and dispersal. Biofilm dispersal in the soil bacterium Pseudomonas putida is regulated by environmental cues, such as overall nutrient availability, specifically carbon limitation, that indirectly regulate the intracellular concentration of c-di-GMP. Although the effector mechanisms of this response are already solved, the elements involved in sensing and transducing the starvation signal to control the c-di-GMP pool are as of yet unknown. Therefore, a screening for mutants with defects in biofilm dispersal is described as well as the genetic and phenotypic characterization of a a mutant obtained with this methodology.  A possible regulatory mechanism of starvation-induced biofilm dispersal is proposed

Key polynomials for simple extensions of valued fields

Let $\iota:K\hookrightarrow L\cong K(x)$ be a simple transcendental extension of valued fields, where $K$ is equipped with a valuation $\nu$ of rank 1. That is, we assume given a rank 1 valuation $\nu$ of $K$ and its extension $\nu'$ to $L$. Let $(R_\nu,M_\nu,k_\nu)$ denote the valuation ring of $\nu$. The purpose of this paper is to present a refined version of MacLane's theory of key polynomials, similar to those considered by M. Vaqui\'e, and reminiscent of related objects studied by Abhyankar and Moh (approximate roots) and T.C. Kuo. Namely, we associate to $\iota$ a countable well ordered set $$\mathbf{Q}=\{Q_i\}_{i\in\Lambda}\subset K[x];$$ the $Q_i$ are called {\bf key polynomials}. Key polynomials $Q_i$ which have no immediate predecessor are called {\bf limit key polynomials}. Let $\beta_i=\nu'(Q_i)$. We give an explicit description of the limit key polynomials (which may be viewed as a generalization of the Artin--Schreier polynomials). We also give an upper bound on the order type of the set of key polynomials. Namely, we show that if $\operatorname{char}\ k_\nu=0$ then the set of key polynomials has order type at most $\omega$, while in the case $\operatorname{char}\ k_\nu=p>0$ this order type is bounded above by $\omega\times\omega$, where $\omega$ stands for the first infinite ordinal.Comment: arXiv admin note: substantial text overlap with arXiv:math/060519

Monomial discrete valuations in k[[X]]

Let v be a rank m discrete valuation of k[[X1,...,Xn]] with dimension n-m. We prove that there exists an inmediate extension L of K where the valuation is monomial. Therefore we compute explicitly the residue field of the valuation