Pulsating stars have given important information in classical astronomy and are still an active research field, e.g. asteroseismology or helioseismology. By studying the rich oscillation stellar spectra, optical astronomy makes predictions for the stellar equations of state (EOS), the evolutionary age of the stars, and in the case of Cepheids one can make exact predictions for the distance of t...

We present the results of a nonadiabatic, linear stability analysis of models of very low-mass stars (VLMSs) and brown dwarfs (BDs) during the deuterium burning phase in the center. We find unstable fundamental modes with periods varying between ∼5 hr for a 0.1 M⊙ star and ∼1 hr for a 0.02 M⊙ BD. The growth time of the instability decreases with decreasing mass and remains well below the deuter...

Recent observations at the magnetopause and of the high-latitude ionosphere, suggest that the cusp may be pulsed in nature. Specifically ground-based observations in the dayside auroral oval reveal transient optical features accompanied by bursts of enhanced plasma flow. Also, recent interpretation has shown cusp satellite data to be consistent with a burst of enhanced reconnection. In this pap...

Based on the Lifshitz theory we show that the illumination of one (Si) plate in the three-layer systems Au–ethanol–Si, Si–ethanol–Si and α-Al2O3–ethanol– Si with laser pulses can change the Casimir attraction to Casimir repulsion and vice versa. The proposed effect opens novel opportunities in nanotechnology to actuate the periodic movement in electroand optomechanical micromachines based entir...

Some ?weeks ago, a Constable came into hospital with the above ailment. The tumour was well defined, as large as a cricket ball, and situated above the umbilicus. I desired Sub-Assistant Surgeon Soorjee Narain Singh, at that time in charge of the dispensary, to diagnose and report upon the case, lie decided that it was a foecal tumour, lying upon the aorta, and pointed out with great clearness ...

When fluid flows through the underwater vehicles, flow separation occurs, and generates eddy currents, which in turn induce pulsating pressure on surfaces of generating noise making vehicle easy to expose. We conducted research this phenomenon, taking cone-column shell as object based Large Eddy Simulation (LES) theory. Additionally, calculation results each parameter such grid scale structural...

Topical drug delivery to poorly ventilated paranasal sinuses is challenging. Pulsating aerosols can improve the deposition of drugs like cortisol in sinuses. The current study compares effect Budesonid administered as pulsating aerosol comparison conventional nasal spray