[Cognitive impairment in patients with arterial hypertension depending on the presence of risk factors for chronic kidney disease at the sanatorium stage].

Unlabelled: Vascular cognitive disturbances are widespread in patients with arterial hypertension, especially when attached to arterial hypertension of chronic kidney disease. Each of these diseases has a negative impact on brain vessels and may contribute to cognitive deficits.

The Purpose Of The Study: To evaluate the neuropsychological profile and determine the risk of cognitive impairment in patients with arterial hypertension depending on the presence or absence of risk factors for chronic renal disease at the sanatorium stage.

Deconvolution of astronomical images using SOR with adaptive relaxation.

We address the potential performance of the successive overrelaxation technique (SOR) in image deconvolution, focusing our attention on the restoration of astronomical images distorted by atmospheric turbulence. SOR is the classical Gauss-Seidel iteration, supplemented with relaxation. As indicated by earlier work, the convergence properties of SOR, and its ultimate performance in the deconvolution of blurred and noisy images, can be made competitive to other iterative techniques, including conjugate gradients, by a proper choice of the relaxation parameter.

Helioseismic measurement of solar torsional oscillations.

Bands of slower and faster rotation, the so-called torsional oscillations, are observed at the Sun's surface to migrate in latitude over the 11-year solar cycle. Here, we report on the temporal variations of the Sun's internal rotation from solar p-mode frequencies obtained over nearly 6 years by the Michelson Doppler Imager (MDI) instrument on board the Solar and Heliospheric Observatory (SOHO) satellite. The entire solar convective envelope appears to be involved in the torsional oscillations, with phase propagating poleward and equatorward from midlatitudes at all depths throughout the convective envelope.

The Seismic Structure of the Sun.

Global Oscillation Network Group data reveal that the internal structure of the sun can be well represented by a calibrated standard model. However, immediately beneath the convection zone and at the edge of the energy-generating core, the sound-speed variation is somewhat smoother in the sun than it is in the model. This could be a consequence of chemical inhomogeneity that is too severe in the model, perhaps owing to inaccurate modeling of gravitational settling or to neglected macroscopic motion that may be present in the sun.