Entropy production for coarse-grained dynamics

Systems out of equilibrium exhibit a net production of entropy. We study the dynamics of a stochastic system represented by a Master Equation that can be modeled by a Fokker-Planck equation in a coarse-grained, mesoscopic description. We show that the corresponding coarse-grained entropy production contains information on microscopic currents that are not captured by the Fokker-Planck equation and thus cannot be deduced from it. We study a discrete-state and a continuous-state system, deriving in both the cases an analytical expression for the coarse-graining corrections to the entropy production. This result elucidates the limits in which there is no loss of information in passing from a Master Equation to a Fokker-Planck equation describing the same system. Our results are amenable of experimental verification, which could help to infer some information about the underlying microscopic processes

The Regulatory Framework of Export Restrictions in WTO Law and Regional Free Trade Agreements. IES WORKING PAPER 8/2013

The use of export restrictions has become more and more common in recent years, evidencing the substantial loopholes existing in the WTO regulation on the matter. As a result of this deficient legal framework, the WTO membership experiences important losses of welfare and increasing political tensions. The multilateral negotiations for an updated discipline on export restrictions, in the context of the Doha Development Round, are blocked. Consequently, members have established a set of preferential bilateral and multilateral agreements to relieve the negative effects of these measures. Likewise, some recent WTO members have committed to stricter regulations as part of their Accession Protocols. Nevertheless, these methods have evidenced some important flaws, and the multilateral scene remains the optimum forum to address export restrictions. This Working Paper proposes a number of measures to improve the legal framework of the quantitative export restrictions and export duties, as well as their notification procedures

Navegación de UAVs con Deep Learning

La Navegación es una de las tareas más complejas de la robótica. Esta involucra problemas de localización, para el punto de destino y del UAV, creación de trayectorias y movimiento para llegar al punto final. El objetivo de este proyecto es crear una red neuronal capaz de proporcionar referencias en velocidad para hacer que el UAV llegue a la posición de destino. Para realizar esta tarea, se necesita cierta información, como las posiciones o imágenes, para así estrenar la red y hacer que el robot se mueva a través de entornos desconocidos. El UAV no solo tendrá que llegar a la posición final, también deberá esquivar cualquier obstáculo que se encuentre en el camino. Para obtener los resultados, se ha hecho uso de ROS y Gazebo, los que nos permiten interaccionar con entornos de simulación realistas. Con ellos se han podido hacer experimentos para entrenar al agente y probar el funcionamiento del mimo en un entorno.Navigation is one of the most difficult tasks in robotics. It involves a location problem, for the target point and the UAV itself, path creation and movement in order to reach the final point. The aim of this project is to create a neural network able to provide velocity references to make the UAV reach the final point. To perform this task, we need to feed it with some data, such as positions or images from the surroundings, so that the network can process all this information and move the robot through an unknown environment. Not only does it need to reach the final point, but it must avoid any collisions within the journey. In order to get the results, it has been used ROS and Gazebo which enables us to interact with a realistic environment. With them we can make some experiments that we will use to train the agent, and later, test how was its performance.Universidad de Sevilla. Grado en Electrónica, Robótica y Mecatrónic

Non-Relativistic Maxwell Chern-Simons Gravity

We consider a non-relativistic (NR) limit of $(2+1)$-dimensional Maxwell Chern-Simons (CS) gravity with gauge algebra [Maxwell] $\oplus \ u(1)\oplus u(1)$. We obtain a finite NR CS gravity with a degenerate invariant bilinear form. We find two ways out of this difficulty: To consider i) [Maxwell] $\oplus\ u(1)$, which does not contain Extended Bargmann gravity (EBG); or, ii) the NR limit of [Maxwell] $\oplus\ u(1)\oplus u(1)\oplus u(1)$, which is a Maxwellian generalization of the EBG.Comment: 19 pages, 1 table, subsection 3.3 added, abstract and references modifie

Juan Emar. La pereza del escritor y la apertura del tiempo

Este artículo reflexiona la pregunta por la posibilidad de apertura del tiempo en las vanguardias estéticas, donde todo lo sido es en lo contemporáneo revestido como lo nuevo en una actualización del pasado en diálogo con el presente. Se utiliza la obra de Juan Emar para problematizar la periodización de la vanguardia, donde las obras ya no permiten entender las épocas en orden teleológico, con lo que se lleva a cabo una fuerte crítica a las teorías del progreso a través de una escritura desbordante que persigue la apertura del tiempo

Investigation of Wind and Temperature Dependence for Dimensioning of Laminated Inserts

This study proposes a review of different design approaches allowing to dimension a laminated insert connection. It focuses on façade assemblies, where the critical load is due to wind, and where the stiffness relies on a highly viscoelastic material SentryGlas®. The high variability of material stiffness is considered using three different approaches. The first approach determines critical wind speeds and temperature values using a site-specific probabilistic analysis. The second approach uses the First Order Reliability Method to perform a probabilistic design. The final approach suggests a method for evaluating the wind and temperature dependence. This method is based on the Monte-Carlo simulation method and shows potential for optimizing the dimensioning of such façade connections