Interplay of superexchange and orbital degeneracy in Cr-doped LaMnO3

We report on structural, magnetic and Electron Spin Resonance (ESR) investigations in the manganite system LaMn_{1-x}Cr_{x}O_{3} (x<=0.5). Upon Cr-doping we observe a reduction of the Jahn-Teller distortion yielding less distorted orthorhombic structures. A transition from the Jahn-Teller distorted O' to the pseudocubic O phase occurs between 0.3<x<0.4. A clear connection between this transition and the doping dependence of the magnetic and ESR properties has been observed. The effective moments determined by ESR seem reduced with respect to the spin-only value of both Mn^{3+} and Cr^{3+} ions

On the nature of verb–noun dissociations in bilectal SLI: a psycholinguistic perspective from Greek

We report on object and action picture-naming accuracy in two groups of bilectal speakers in Cyprus, children with typical language development (TLD) and children with specific language impairment (SLI). Object names were overall better retrieved than action names by both groups. Given that comprehension for action names was relatively intact for all children, this finding is taken to be the result of a breakdown at the interface of the semantic lexicon and phonological representations, or access to them. The results complement similar research on English, a minimally inflected language in contrast to Greek. Overall, cross-linguistic word class effects provide strong evidence for the hypothesis that grammatical category is an organizing principle shared across languages. Finally, our results suggest that bilectal children with SLI present with general lexical delay rather than a deficit in verb naming per se

Seismic Waveform Data from Greece and Cyprus: Integration, Archival, and Open Access

Abstract The National Observatory of Athens data center for the European Integrated Data Archive (EIDA@NOA) is the national and regional node that supports International Federation of Digital Seismograph Networks and related webservices for seismic waveform data coming from the southeastern Mediterranean and the Balkans. At present, it serves data from eight permanent broadband and strong-motion networks from Greece and Cyprus, individual stations from the Balkans, temporary networks and aftershock deployments, and earthquake engineering experimental facilities. EIDA@NOA provides open and unlimited access from redundant node end points, intended mainly for research purposes (see Data and Resources). Analysis and quality control of the complete seismic data archive is performed initially by calculating waveform metrics and data availability. Seismic ambient noise metrics are estimated based on power spectral densities, and an assessment of each station’s statistical mode is achieved within each network and across networks. Moreover, the minimum ambient noise level expected for strong-motion installations is defined. Sensor orientation is estimated using surface-wave polarization methods to detect stations with misalignment on particular epochs. A single data center that hosts the complete seismic data archives with their respective metadata from networks covering similar geographical areas allows coordination between network operators and facilitates the adhesion to widely used best practices regarding station installation, data curation, and metadata definition. The overall achievement is harmonization among all contributing networks and a wider usage of all data archives, ultimately strengthening seismological research efforts in the region.</jats:p