Deep float experiment final evaluation

Research Project co-funded by the European Commission Research Directorate-General 7th Framework Programme Project No. 312642This document details the experiment and analysis carried out with the Argo Deep floats in the framework of the E-AIMS project The IEO is leading task 2.2 Test of new deep float and testing one prototype of deep Argo floats designed by Ifremer that are capable of reaching depth greater than 4000 dBar. These prototypes are now commercialized by NKE who is in charge of performing the industrialization tasks. The float tested in the framework of task 2.2 was part of the first batch of prototypes and of the second generation of floats. The test were carried out in the Canary Basin.European Union, Instituto Español de Ocenografí

Lattice effects and current reversal in superconducting ratchets

Competition between the vortex lattice and a lattice of asymmetric artificial defects is shown to play a crucial role in ratchet experiments in superconducting films. We present a novel and collective mechanism for current reversal based on a reconfiguration of the vortex lattice. In contrast to previous models of vortex current reversal, the mechanism is based on the global response of the vortex lattice to external forces.Comment: 12 pages, 7 figure

Comparação de resultados antes e depois da implantação das normas nbr para extrativos totais e lignina insolúvel.

Resumo

Recent Mediterranean Outflow Water and Atlantic Meridional Overturning Circulation correlations

The Atlantic Meridional Overturning Circulation (AMOC) is the main contributor to the heat interchange in the North Atlantic, carrying around 1.5 PW at 25°N, which helps to regulate the climate, especially in Europe. Any slowdown of the AMOC would produce an important decrease in the temperature in the regions around the North Atlantic and also in other parts of the world. A factor that affects the strength of the AMOC is the input of water. While an input of freshwater would produce a reduction in the transport of the AMOC, a supply of salty water, such as the Mediterranean Outflow Water (MOW), would enhance the formation of deep water, strengthening the AMOC, and even stabilizing it. The aim of this work is to determine if the variation of the volume of the MOW is having any effect in the fluctuation of the transport of the AMOC. In order to achieve this, we developed a method to estimate the volume of MOW in the North Atlantic using the Roemmich-Gilson Argo Climatology and compared it with the observations of the AMOC from the RAPID array. Although statistically, there was a low correlation, the similarities between the MOW and RAPID time series were evident, especially for the period 2012-2017. A possible explanation of this resemblance is that the changes that occur in the AMOC also affect the interchange between the Atlantic and the Mediterranean, and therefore the volume of MOW in the Atlantic

Identificación y descripción de procesos reales en la universidad EAFIT bajo la perspectiva de sistemas dinámicos

Este trabajo está enfocado hacia el estudio de los sistemas dinámicos en la universidad EAFIT, a partir de visitas realizadas a los laboratorios de la universidad, haciendo una breve descripción de máquinas y procesos bajo la teoría de los sistemas dinámicos, teniendo en cuenta las características más importantes de un sistema dinámico como lo son: entrada, salidas, posibles perturbaciones. Dejando así un importante apoyo para quienes después se puedan interesar tanto en describir como llegar a un posible control de algunos de los procesos, dada la necesidad en la universidad por personas interesadas en este tipo de estudios, pues en las visitas realizadas a dichos laboratorios se pudo observar la falta de interés tanto de los estudiantes como de la misma universidad para realizar un mejor estudio de los procesos, viendo así como muchos de los procesos no son desarrollados de la mejor manera. Hecha la descripción de los procesos, se procederá a un estudio mucho más detallado de dos de estos procesos reales empezando con la modelación y simulación del mismo, bajo la teoría de los sistemas lineales usando como herramienta de simulación MATLAB SIMULINK