Estimating Energy Dissipation Rate from Breaking Waves Using Polarimetric SAR Images.

The total energy dissipation rate on the ocean surface, ϵt (W m-2), provides a first-order estimation of the kinetic energy input rate at the ocean-atmosphere interface. Studies on the spatial and temporal distribution of the energy dissipation rate are important for the improvement of climate and wave models. Traditional oceanographic research normally uses remote measurements (airborne and platforms sensors) and in situ data acquisition to estimate ϵt; however, those methods cover small areas over time and are difficult to reproduce especially in the open oceans.

[Assessment of drinking water quality in Avellino (Italy) by multivariate analysis].

The aim of this study was to assess the quality of the drinking water supply in the district of Avellino (Italy), by evaluating physico-chemical parameters and presence of contaminants. A multivariate approach was used to analyse data and to evaluate compliance to norms and standards. Study results indicate that statistical modeling is a powerful descriptive method to identify qualitative temporal trends in water quality and, if repeated in time, allows an evaluation of representativeness of the sampling points.

Differences between partial polarizations in the space-time and space-frequency domains.

The time-domain degree of polarization of a stationary, random optical beam, in general, differs from that in the frequency domain. We elucidate the origin of their differences and consider several examples in which the two degrees of polarization either are or are not the same.