In this paper, we address energy savings on a Cloud-based opportunistic infrastructure. The infrastructure implements opportunistic design concepts to provide basic services, such as virtual CPUs, RAM and Disk while profiting from unused capabilities of desktop computer laboratories in a non-intrusive way. We consider the problem of virtual machines consolidation on the opportunistic cloud comp...

We present results of lattice computations using overlap fermions on a twisted mass background. N f = 2 full QCD gauge configurations have been produced by the ETM Collaboration with very light pions (down to less than 300 MeV), with small lattice spacing (a ≈ 0.09 fm) and large volumes (V/a4 = 243 ×48). By profiting of the good chiral properties of the overlap operator for the valence quarks, ...

Abstract High-energy $$\gamma \gamma $$ γ colliders constitute a potential running mode of future lepton such as the ILC and CLIC. We study sensitivity high-energy collider to Higgs portal scenario hidden sector above invisible decay threshold. show that collisions could allow probe exi...

This paper discusses methodologies for analyzing relations between social inequalities, marginalization, prejudice, and vulnerability to HIV/AIDS, highlighting current difficulties and alternative research strategies. It also reviews the international and Brazilian literature, emphasizing: economic and macropolitical dimensions in the spread of HIV/AIDS; the role of drug policies and consumptio...

Given is a problem sequence and a probability distribution (the bias) on programs computing solution candidates. We present an optimally fast way of incrementally solving each task in the sequence. Bias shifts are computed by program prefixes that modify the distribution on their suffixes by reusing successful code for previous tasks (stored in non-modifiable memory). No tested program gets mor...

Self-Localization is a crucial task for mobile robots. It is not only a requirement for auto navigation but also provides contextual information to support human robot interaction (HRI). In this paper we present an active vision-based localization method for integration in a complex robot system to work in human interaction scenarios (e.g. home-tour) in a real world apartment. The holistic feat...

The paper deals with the analysis of informational efficiency of the European emissions trading scheme (EU ETS) with the goal of stating whether or not the system has been able to achieve its proclaimed cost-efficiency within the first two trading periods. The efficient market hypothesis suggests that profiting from predicting price behaviour is difficult as the market price should incorporate ...

In this paper we present a multiclassifier approach for multilabel document classification problems, where a set of k-NN classifiers is used to predict the category of text documents based on different training subsampling databases. These databases are obtained from the original training database by random subsampling. In order to combine the predictions generated by the multiclassifier, Bayes...