In the optical spectra of cold post-AGB supergiant GSC 04050$-$02366, obtained with 6-meter BTA telescope a spectral resolution R$\ge$60000 on arbitrary dates over 2019$\div$2021, radial velocity variability is found. Heliocentric Vr based positional measurements numerous absorptions varies from date to standard deviation $\Delta$Vr$\approx$1.4 km/s about average value Vr=24.75 km/s, which may ...

Numerical simulation of structural response is a challenging issue in earthquake engineering and there has been remarkable progress in this area in the last decade. Endurance Time (ET) method is a new response history based analysis procedure for seismic assessment and structural design in which structures are subjected to a gradually intensifying dynamic excitation and their seismic performanc...

UNLABELLED Benign paroxysmal positional vertigo (BPPV) may compromise the balance of elderly subjects. OBJECTIVE To observe the effects of the Epley maneuver in elderly subjects with BPPV and assess clinical and functional aspects of body balance. METHOD This is a prospective clinical study. Patients diagnosed with BPPV (Dix-Hallpike test) were submitted to the Timed Up & Go (TUG) test, the...

This report presents a therapeutic procedure for refractory benign paroxysmal positional vertigo (antBPPV) of the anterior canal. Two patients with refractory antBPPV were treated by a prolonged forced position procedure (PFPP). The technique is based on the assumption that the pathophysiological mechanism of antBPPV is similar to that generating posterior canal canalolithiasis. The patients re...

the suppression of the regenerative chatter phenomenon in turning process via the variation of the frequency and amplitude of the spindle motor excitation is carried out in this research. a programmable inverter is employed for variable periodic excitation of the spindle motor. a set of turning experiments is designed and performed on a number of conical work pieces both in constant spindle spe...