15 citations
- National and Kapodistrian University of AthensGR5 papers
- Alexander Technological Educational Institute of ThessalonikiGR1 paper
- Aryabhatta Research Institute of Observational SciencesIN1 paper
- Astronomical Observatory of RomeIT1 paper
- ETH ZurichCH1 paper
- European Synchrotron Radiation FacilityFR1 paper
- Institute of Astrophysics and Space SciencesPT1 paper
- Janssen (France)FR1 paper
- Laboratoire d’études spatiales et d’instrumentation en astrophysiqueFR1 paper
- Laboratory for Solid State PhysicsCH1 paper
- Max Planck Institute for Solar System ResearchDE1 paper
- National Astronomical Observatory of JapanJP1 paper
9 papers
Distribution-Free Modal Logics: Sahlqvist -- Van Benthem Correspondence
Chrysafis, Hartonas
We present an extension and generalization of Sahlqvist--Van Benthem correspondence to the case of distribution-free modal logic, with, or without negation and/or implication conne…
Analysis of full-disc H alpha observations: Carrington maps and filament properties in 1909-2022
Theodosios Chatzistergos, Ilaria Ermolli, Dipankar Banerjee +14
Full disc observations of the Sun in the H line provide information about the solar chromosphere and in particular about the filaments, which are dark and elongated features tha…
Reciprocity-driven Sparse Network Formation
Konstantinos P. Tsoukatos
A resource exchange network is considered, where exchanges among nodes are based on reciprocity. Peers receive from the network an amount of resources commensurate with their contr…
Local lattice distortions vs. structural phase transition in NdFeAsO1-xFx
M. Calamiotou, D. Lampakis, N. D. Zhigadlo +5
The lattice properties at low temperatures of two samples of NdFeAsO1-xFx (x=0.05 and 0.25) have been examined in order to investigate possible structural phase transition that may…
Collision Avoidance in TV White Spaces: A Cross-layer Design Approach for Cognitive Radio Networks
Fotis Foukalas, George Karetsos
One of the most promising applications of cognitive radio networks (CRNs)is the efficient exploitation of TV white spaces (TVWSs) for enhancing the performance of wireless networks…
Cross-layer Design of CSMA/CA with Spectrum Sensing for Cognitive Radio Networks
F. Foukalas, G. T. Karetsos, P. Chatzimisios
We devise a cross-layer design (CLD) of carrier sensing multiple access with collision avoidance (CSMA/CA) at the medium access control (MAC) layer with spectrum sensing (SpSe) at…