To manage current network environments we have to change the existent network and systems management paradigms, if we even can admit that one exists. Network Management shouldnot be restricted to protocols, MIB definition, and associated instrumentation. In the end, what is really important is to satisfy user application requirements. One should note that blindly monitoring raw MIB data values ...

Sensitive surveys of the X-ray universe have been limited to small areas of the sky due to the intrinsically small field of view of Wolter-I X-ray optics, whose angular resolution degrades with the square of the off axis angle. High angular resolution is needed to achieve a low background per source, minimize source confusion, and distinguish point from extended objects. WFXT consists of three ...

Observers can generally make reliable judgments of surface color in natural scenes despite changes in an illuminant that is out of view. This ability has sometimes been attributed to observers' estimating the spectral properties of the illuminant in order to compensate for its effects. To test this hypothesis, two surface-color-matching experiments were performed with images of natural scenes o...

Numerous studies have analyzed existing irradiance models for estimating sky diffuse on tilted planes. However, few evaluated the suitability of these in obstructed environments, specifically considering effects obstacles. In this study, three —one them with five variants— planes located urban environments were evaluated. All been adapted to consider effect an canyon received a plane through vi...

This paper presents a search for radio transients at a frequency of 73.8 MHz (4 m wavelength) using the all-sky imaging capabilities of the Long Wavelength Demonstrator Array (LWDA). The LWDA was a 16-dipole phased array telescope, located on the site of the Very Large Array in New Mexico. The field of view of the individual dipoles was essentially the entire sky, and the number of dipoles was ...

A decrease in stratospheric ozone may result in a serious threat to plants, since biologically active short-wavelength ultraviolet-B (UV-B 280–320 nm) radiation will increase even with a relatively small decrease in ozone. Numerous investigations have demonstrated that the effect of UV-B enhancements on plants includes reduction in grain yield, alteration in species competition, susceptibility ...

Various spherical radiative transfer (SRT) computer codes that model ultraviolet (UV) sky intensities incident at the Earth’s surface are compared for clear-sky (Rayleigh scattering and ozone absorption) and hazy-sky (stratospheric volcanic aerosol, Rayleigh scattering, and ozone absorption) atmospheric conditions. Calculated sky intensities using Dave vector (pseudospherical), Dave scalar (pse...

1 Non-strategic point of view Arrow Harsanyi and utilitarianism Interpersonal comparison of utilities 2 Strategic aspects and game theory Strategic voting, and G-S " Small worlds " Computational issues 3 A broader picture Great confusion under the sky: excellent situation! To put the cart before the horses Non welfarist approaches F. Patrone Preference aggregation and GT Non-strategic point of ...

The growing emissions of artificial light to the atmosphere are producing, among other effects, a significant increase of the night sky brightness (NSB) above its expected natural values. A permanent sensor network has been deployed in Galicia (northwest of Iberian peninsula) to monitor the anthropogenic disruption of the night sky darkness in a countrywide area. The network is composed of 14 d...