We present measurements of the clustering of hot and cold patches in the microwave background sky as measured from the W ilkinson M icrowave Anisotropy Probe (WMAP) five-year data. These measurements are compared with theoretical predictions which assume that the cosmological signal obeys Gaussian statistics. We find significant differences from the simplest Gaussian-based prediction. However, ...

The self-focusing/defocusing of Hermite-sinh-Gaussian (HshG) laser beam in underdense inhomogeneous plasmas is studied by using higher-order approximation theory. It found that Hermite mode index and the fluctuation periodic plasma density have a significant effect on dielectric constant self-focusing/self-defocusing. With increase index, high-order HshG beneficial to suppress self-focusing enh...

Observations show that there are twisted magnetic flux tubes and plasma flow throughout the solar atmosphere. The main purpose of this work is to obtain damping rate sausage modes in presence twist flow. We dispersion relation for slow continuity an inhomogeneous layer under conditions pores, then we solve it numerically. For selected density profile, field, as a function radius across layer, e...