Manejo da pesca e a interdisciplinaridade

The present state of world fisheries shows that fishery management is unable to sustain yields andresolve the conflicts between conservation and development. Fishery science recognized the importance of multi-disciplinarity long ago, particularly in subjects like stock recruitment, abundance fluctuations and trophic relationships. In order to attain a better level of understanding and efficiency, fishery management needs to incorporate and integrate an interdisciplinary approach, where important aspects as sociology and economics of the different actors and stakeholders must be weighted and considered

Geometrical statistics of the vorticity vector and the strain rate tensor in rotating turbulence

We report results on the geometrical statistics of the vorticity vector obtained from experiments in electromagnetically forced rotating turbulence. A range of rotation rates $\Omega$ is considered, from non-rotating to rapidly rotating turbulence with a maximum background rotation rate of $\Omega=5$ rad/s (with Rossby number much smaller than unity). Typically, in our experiments ${\rm{Re}}_{\lambda}\approx 100$. The measurement volume is located in the centre of the fluid container above the bottom boundary layer, where the turbulent flow can be considered locally statistically isotropic and horizontally homogeneous for the non-rotating case, see van Bokhoven et al., Phys. Fluids 21, 096601 (2009). Based on the full set of velocity derivatives, measured in a Lagrangian way by 3D Particle Tracking Velocimetry, we have been able to quantify statistically the effect of system rotation on several flow properties. The experimental results show how the turbulence evolves from almost isotropic 3D turbulence ($\Omega\lesssim 0.2$ rad/s) to quasi-2D turbulence ($\Omega\approx 5.0$ rad/s) and how this is reflected by several statistical quantities. In particular, we have studied the orientation of the vorticity vector with respect to the three eigenvectors of the local strain rate tensor and with respect to the vortex stretching vector. Additionally, we have quantified the role of system rotation on the self-amplification terms of the enstrophy and strain rate equations and the direct contribution of the background rotation on these evolution equations. The main effect is the strong reduction of extreme events and related (strong) reduction of the skewness of PDFs of several quantities such as, for example, the intermediate eigenvalue of the strain rate tensor and the enstrophy self-amplification term.Comment: 17 pages, 6 figures, 3 table

Improved Fine Particles Monitoring in Smart Cities by Means of Advanced Data Concentrator

Traffic reduction and air-quality improvement are among the main goals of several projects worldwide. This article presents a fine particle monitoring based on heterogeneous air quality mobile sensors and an advanced data concentrator (AdDC), so that the level of pollution in the urban area, where few accurate fixed measurement stations are present, can be assessed with better accuracy. Some urban buses are used to carry low-cost sensors, thus implementing a mobile sensor network and increasing the time and space resolution of air quality information. The data obtained by these low-cost sensors are significantly affected by uncertainties, also due to atmospheric factors, such as humidity. The proposed AdDC processes all the obtained measurements and exploits the information obtained by the accurate fixed stations to improve the accuracy of the low-cost mobile sensors. In particular, a new compensation methodology, specifically targeted to the fine particles monitoring, is proposed. The monitoring of relative humidity is added, with the relevant on-the-fly calibration, so that the measured values can be used to correct the effects of humidity on PM2.5 sensors. The validity of the proposed system is proven by means of simulations performed on an appropriate set up

Classical bridge functions in classical and quantum plasma liquids

Bridge functions, the missing link in the exact description of strong correlations, are indirectly extracted from specially designed molecular dynamics simulations of classical one-component plasma liquids and accurately parameterized. Their incorporation into an advanced integral equation theory description of Yukawa one-component plasma liquids and a novel dielectric formalism scheme for quantum one-component plasma liquids leads to an unprecedented agreement with available molecular dynamics simulations and new ab initio path integral Monte Carlo simulations, respectively.Comment: 6 pages, 4 figures, 2 table

In whose name? : political representation and civil organisations in Brazil

There is now considerable evidence that civil organisations have become de facto and de jure representatives of particular segments of the population and interests in the design, implementation, and monitoring of public policy. This paper explores two questions that are becoming increasingly important in the debate on the role of “civil society” in contemporary democracy: Who do civil organisations represent when they act as representatives in the polity; and, in what terms is this representation constructed? The role of civil organisations in political representation has received little or no attention in the research agendas on the reconfiguration of representation or on the democratising of democracy. Furthermore, there are no wellestablished theoretical models beyond the classic electoral or membership ones which set out how civil organisations could establish their representativeness. The vast majority of civil organisations in middleand low-income countries, however, are not membership based and few make use of electoral procedures to authorise a mandate or establish accountability. This paper examines which organisations define themselves as political representatives and the forms of representation they are constructing. It also explores some of the possible consequences of different forms of representation for democracy. The paper draws on findings of a survey of civil organisations – that is, neighbourhood or community associations, membership organisations, NGOs, and coordinators of networks of these organisations – in the city of São Paulo, Brazil. We find that organisations that publicly claim to be representatives of particular publics in fact do engage in extensive representation activities; and, that the dynamics of representation among civil organisations are closely related to those of traditional political channels of representation. Furthermore, we find that the congruency arguments civil organisations make publicly to support their representativeness are crystallising around a small number of notions of representation. The most common are mediation, proximity, and services. The least common are identity, electoral, and membership

The 2009 EU Industrial R&D Investment SCOREBOARD

The 2009 "EU Industrial R&D Investment Scoreboard" (the Scoreboard) presents information on the top 1000 EU companies and the top 1000 non-EU companies ranked by their investments in research and development (R&D). The Scoreboard data are drawn from the latest available companies' accounts, i.e. the fiscal year 2008 . In the last part of this reporting period, the world economy entered into a strong financial and economic crisis that affected companies throughout the world. Some of the effects of the crisis are already reflected in these company results, namely on indicators such as sales, operating profits and market capitalisation. However, the full effects of the crisis, especially on R&D, tend to lag and are not yet captured in this Scoreboard.JRC.J.3-Knowledge for Growt