University of the Aegean

About: University of the Aegean is a education organization based out in Mytilene, Greece. It is known for research contribution in the topics: Population & Context (language use). The organization has 2818 authors who have published 8100 publications receiving 179275 citations. The organization is also known as: UAEG.

Vector evaluated differential evolution for multiobjective optimization

Abstract: A parallel, multi-population differential evolution algorithm for multiobjective optimization is introduced. The algorithm is equipped with a domination selection operator to enhance its performance by favouring non-dominated individuals in the populations. Preliminary experimental results on widely used test problems are promising. Comparisons with the VEGA approach are provided and discussed.

Search for strong production of supersymmetric particles in final states with missing transverse momentum and at least three b-jets at √s = 8 TeV proton-proton collisions with the ATLAS detector

Abstract: This paper reports the results of a search for strong production of supersymmetric particles in 20.1 fb(-1) of proton-proton collisions at a centre-of-mass energy of 8 TeV using the ATLAS detector at the LHC. The search is performed separately in events with either zero or at least one high-p (T) lepton (electron or muon), large missing transverse momentum, high jet multiplicity and at least three jets identified as originated from the fragmentation of a b-quark. No excess is observed with respect to the Standard Model predictions. The results are interpreted in the context of several supersymmetric models involving gluinos and scalar top and bottom quarks, as well as a mSUGRA/CMSSM model. Gluino masses up to 1340 GeV are excluded, depending on the model, significantly extending the previous ATLAS limits.

Patterns of beta diversity in Europe: the role of climate, land cover and distance across scales

Abstract: Aim We test the prediction that beta diversity (species turnover) and the decay of community similarity with distance depend on spatial resolution (grain). We also study whether patterns of beta diversity are related to variability in climate, land cover or geographic distance and how the independent effects of these variables depend on the spatial grain of the data. Location Europe, Great Britain, Finland and Catalonia. Methods We used data on European birds, plants, butterflies, amphibians and reptiles, and data on British plants, Catalonian birds and Finnish butterflies. We fitted two or three nested grids of varying resolutions to each of these datasets. For each grid we calculated differences in climate, differences in land-cover composition (CORINE) and beta diversity (bsim, bJaccard) between all pairs of grid cells. In a separate analysis we looked specifically at pairs of adjacent grid cells (the first distance class). We then used variation partitioning to identify the magnitude of independent statistical associations (i.e. independent effects in the statistical sense) of climate, land cover and geographic distance with spatial patterns of beta

Implementing the Strategy

Abstract: Although confident that the international climate was receptive and the time ripe for a more forthcoming policy vis-a-vis Turkey, Greek decision makers271 had to test the new strategy against the interests of certain European Union (EU) countries. In other words, the lifting of Greece’s veto and the granting of candidate status to Turkey should be followed by a series of conditions to which Greece’s EU partners should concede. To this end, an unofficial Task Force was established at the Ministry of Foreign Affairs with the aim of sounding out EU partners’ response to an eventual U-turn in Greece’s policy vis-a-vis Turkey,272 while a series of diplomatic initiatives (official and unofficial contacts and discussions) were undertaken beginning in September 1999 by some of the key figures of Greece’s new strategy apparatus.273 Some of those meetings between Greek decision-makers and key political figures of certain EU partners succeeded in putting forward Greece’s new argumentation in a convincing way and, most importantly, in outlining the conditions that should be fulfilled in order for the Greek government to concede to the granting of a candidacy status to Turkey.