Abstract: Electric vehicles (EV) offer a great potential to address the integration of renewable energy sources (RES) in the power grid, and thus reduce the dependence on oil as well as the greenhouse gases (GHG) emissions. The high share of wind energy in the Portuguese energy mix expected for 2020 can led to eventual curtailment, especially during the winter when high levels of hydro generati...

We consider the convexity of chance constraints with random righthand side. While this issue is well understood (thanks to Prékopa’s Theorem) if the mapping operating on the decision vector is componentwise concave, things become more delicate when relaxing the concavity property. In an earlier paper, the significantly weaker r-concavity concept could be exploited, in order to derive eventual c...

Data replication places physical copies of a shared logical item onto different sites. Optimistic replication (OR) allows a program at some site to read or update the local replica at any time. An update is tentative because it may conflict with a remote update. Such conflicts are resolved after the fact, in the background. Replicas may diverge occasionally but are expected to converge eventual...

A conflict is a common phenomenon that results from the interaction between both individuals and groups of individuals. For the development of knowledge-based systems, one needs to multiply sources of expertise, so that one may be able to generate several types of conflicts from these sources. The classical approach which avoids dealing with conflicts is not suitable. Therefore, in order to cap...

Distributed services that are accessed by widely distributed clients are becoming common place (e.g., especially services targeted to the home). Such services cannot be provided at the needed level of performance and availability(1) without replicating the service at multiple nodes, and (2) without allowing a \relatively" weak level of consistency among replicated copies of the state of a servi...

An earlier reported method for revealing latent periodicity of the nucleotide sequences has been considerably modified in a case of small samples, by applying a Monte Carlo method. This improved method has been used to search for the latent periodicity of some nucleotide sequences of the EMBL data bank. The existence of the nucleotide sequences' latent periodicity has been shown for some genes....

We introduce and test several novel approaches for periodicity detection in unevenlyspaced sparse datasets. Specifically, we examine five different kinds of periodicity metrics, which are based on non-parametric measures of serial dependence of the phase-folded data. We test the metrics through simulations in which we assess their performance in various situations, including various periodic si...

Striae periodicity refers to the number of cross-striations between successive lines of Retzius in tooth enamel. A regular time dependency of striae periodicity, known as the circaseptan interval, has been proposed. Previous studies on striae periodicity have been carried out on both modern and early humans given its potential applications in forensic age estimations and anthropology. Neverthel...