The aim of the present work is to investigate efficiency flat-plate solar panels in Greece for delivering energy. In this study, are mounted on a two-axis tracker, which follows daily path sun. context, annual energy sums estimated such surfaces from hourly horizontal radiation values at forty-three locations, covering all Greece. embedded typical meteorological years sites obtained PVGIS tool....

UHECRs are roughly isotropic and attain very large energies, E ∼> 3×10 20 eV . Conventional models fail to explain both facts. I show here that acceleration of UHECRs in GRBs satisfies both observational constraints. Using Mészáros and Rees’ (1994) model of GRBs as due to hyperrelativistic shocks, I show that the highest energies that can be attained thusly are E ≃ 10 θ−5/3n 1 eV , explaining t...

We study asymptotic behavior of the global attractors to the Boussinesq system for Rayleigh-B enard convection at large Prandtl number. In particular, we show that the global attractors to the Boussinesq system for Rayleigh-B enard convection converge to that of the in nite Prandtl number model for convection as the Prandtl number approaches in nity. This o ers partial justi cation of the in ni...

In the course of the comprehensive CFRS redshift survey to I AB = 22.5 (see Lilly et al, these proceedings) with the CFHT MOS/SIS spectrograph, we have observed ∼25 field galaxies with z > 1. However, it is clear that almost an equal number, predominantly red galaxies, have likely been missed largely because of limitations in the observed wavelength range. The properties of the observed galaxie...

We apply the multipole vector framework to full-sky maps derived from the first year WMAP data. We significantly extend our earlier work showing that the two lowest cosmologically interesting multipoles, l = 2 and 3, are not statistically isotropic. These results are compared to the findings obtained using related methods. In particular, we show that the planes of the quadrupole and the octopol...

We develop a method to study the anisotropy of a cosmic-ray angular distribution, using both the right ascension and the declination of the arrival directions. It generalises the full-sky coverage method of Sommers (2001) to partial-sky coverage experiments. When the angular distribution consists of a dipolar modulation of an otherwise isotropic flux, the method allows one to reconstruct the di...

A stochastic gravitational-wave (GW) background consists of a large number weak, independent and uncorrelated events astrophysical or cosmological origin. The GW power on the sky is assumed to contain anisotropies top an isotropic component, i.e., angular monopole. Complementary LIGO--Virgo--KAGRA (LVK) searches, we develop efficient analysis pipeline compute maximum-likelihood anisotropic maps...

We investigate the properties of the (complex) coefficients obtained in a spherical harmonic representation of temperature maps of the cosmic microwave background (CMB). We study the effect of the coefficient phase only, as well as the combined effects of phase and amplitude. The method used to check for anomalies is to construct a “random walk” trajectory in the complex plane where the step le...