Embedded Linux as a Platform for Dynamically Self-Reconfiguring Systems-On-Chip

We have previously argued the benefits of embedded Linux as an operating system platform for reconfigurable system-on-chip design. In this paper we describe our approach to building tools for the implementation of dynamically and self-reconfigurable systems, and show that embedded Linux is a natural and powerful platform on which to build these tools. We present examples and demonstrations that show how complex operations such as obtaining partial bit streams from remote servers and initiating reconfiguration are achieved with a single line of Linux shell script

Deracialization and Democracy

The United States suffers the conthiued costs of mahitainhig a racial hierarchy. Enhanced diversity and growhig realization of the economic costs of that hierarchy could lead to democratic pressure for reform. Yet, in the U.S., elites on the radical right seek to entrench themselves in power through the constriction of voting power and the strategic use of the racial hierarchy as a political tool. This Article traces the anti-democratic efforts of the radical right to limit the political power of the nation\u27s enhanced diversity, and to utilize archaic governance measures to entrench themselves politically, regardless of the costs of allowing the racial hierarchy to continue to fester. Antidemocratic efforts to limit voting power to assure non-democratic governance and outcomes recently scored significant success as recounted in this Article. The anti-democratic contrivances to limit the power of enhanced diversity requires comparable countermeasures to vindicate the core value of expanded democracy that find its roots in our history and in the Constitution\u27s trajectory towards ever greater democratic governance. This Article surveys countermeasures that could lead to the preservation and even expansion of democratic governance. It concludes that only through a renewed pursuit of expansive voting rights can we restore our democracy and move the nation away from its racist past

Temporal Evolution of Financial Market Correlations

We investigate financial market correlations using random matrix theory and principal component analysis. We use random matrix theory to demonstrate that correlation matrices of asset price changes contain structure that is incompatible with uncorrelated random price changes. We then identify the principal components of these correlation matrices and demonstrate that a small number of components accounts for a large proportion of the variability of the markets that we consider. We then characterize the time-evolving relationships between the different assets by investigating the correlations between the asset price time series and principal components. Using this approach, we uncover notable changes that occurred in financial markets and identify the assets that were significantly affected by these changes. We show in particular that there was an increase in the strength of the relationships between several different markets following the 2007--2008 credit and liquidity crisis.Comment: 15 pages, 10 figures, 1 table. Accepted for publication in Phys. Rev. E. v2 includes additional section

A real-time asymmetric multiprocessor-reconfigurable system-on-chip architecture

We propose an asymmetric multi-processor SoC architecture, featuring a master CPU running uClinux, and multiple loosely-coupled slave CPUs running real-time threads assigned by the master CPU. Real-time SoC architectures often demand a compromise between a generic platform for different applications, and application-specific customizations to achieve performance requirements. Our proposed architecture offers a generic platform running a conventional embedded operating system providing a traditional software-oriented development approach, while multiple slave CPUs act as a dedicated independent real-time threads execution unit running in parallel of master CPU to achieve performance requirements. In this paper, the architecture is described, including the application / threading development environment. The performance of the architecture with several standard benchmark routines is also analysed

The Common Assessment Framework (CAF) and the evaluation of Quality in a Public Service: Case Study of Academic Services of the University of Évora, Portugal

Society is more and more demanding on professional terms. Therefore, in order to achieve Excellence we need to go though processes of continuous improvement and we need to measure and to evaluate Quality which is increasingly seen as a competitive and distinguishing factor between institutions. And institutions from Public Sector like Universities are no exception. It’s urgent to evaluate their quality. But a question remains: how do we evaluate them? Why is it important? Should we evaluate the graduate and post-graduate degrees, the services that support all the University,…What? In Portugal it is compulsory to evaluate the quality of the degrees taught on a Higher Education Institution. For that purpose a set of legislation has been approved: Law n.º38/94 of 21st November, Decree-law n.º205/98 of 11th July and Law n.º1/2003 of 6th January. But if this is a compulsory procedure, shouldn’t the structures that support all the life of a Higher Education Institution also be evaluated? What happens if, for instance, the Academic Services don’t work properly or collapse? This service is considered as essential and fundamental on Higher Education Institutions

Influence of oxidative stress, diaphragm fatigue, and inspiratory muscle training on the plasma cytokine response to maximum sustainable voluntary ventilation

The influence of oxidative stress, diaphragm fatigue, and inspiratory muscle training (IMT) on the cytokine response to maximum sustainable voluntary ventilation (MSVV) is unknown. Twelve healthy males were divided equally into an IMT or placebo (PLA) group, and before and after a 6-wk intervention they undertook, on separate days, 1h of (1) passive rest and (2) MSVV, whereby participants undertook volitional hyperpnea at rest that mimicked the breathing and respiratory muscle recruitment patterns commensurate with heavy cycling exercise. Plasma cytokines remained unchanged during passive rest. There was a main effect of time (P < 0.01) for plasma interleukin-1 (IL-1) and interleukin-6 (IL-6) concentrations and a strong trend (P = 0.067) for plasma interleukin-1 receptor antagonist concentration during MSVV. Plasma IL-6 concentration was reduced after IMT by 27 + 18% (main effect of intervention, P = 0.029), whereas there was no change after PLA (P = 0.753). There was no increase in a systemic marker of oxidative stress [DNA damage in peripheral blood mononuclear cells (PBMC)], and diaphragm fatigue was not related to the increases in plasma IL-1 and IL-6 concentrations. A dose-response relationship was observed between respiratory muscle work and minute ventilation and increases in plasma IL-6 concentration. In conclusion, increases in plasma IL-1 and IL-6 concentrations during MSVV were not due to diaphragm fatigue or DNA damage in PBMC. Increases in plasma IL-6 concentration during MSVV are attenuated following IMT, and the plasma IL-6 response is dependent upon the level of respiratory muscle work and minute ventilation

Dynamic communities in multichannel data: An application to the foreign exchange market during the 2007--2008 credit crisis

We study the cluster dynamics of multichannel (multivariate) time series by representing their correlations as time-dependent networks and investigating the evolution of network communities. We employ a node-centric approach that allows us to track the effects of the community evolution on the functional roles of individual nodes without having to track entire communities. As an example, we consider a foreign exchange market network in which each node represents an exchange rate and each edge represents a time-dependent correlation between the rates. We study the period 2005-2008, which includes the recent credit and liquidity crisis. Using dynamical community detection, we find that exchange rates that are strongly attached to their community are persistently grouped with the same set of rates, whereas exchange rates that are important for the transfer of information tend to be positioned on the edges of communities. Our analysis successfully uncovers major trading changes that occurred in the market during the credit crisis.Comment: 8 pages, 6 figures, accepted for publication in Chao