We present the results of simultaneous optical multi-color observations of BL Lac object 0716+714 in November 2014 and February 2016. The intra-day variability (IDV) varies from 0.04 to 0.3 mags. Both achromatic and bluer-when-brighter (BWB) color behaviors were detected. A probable quasi-periodic oscillation overlapping on a significant flare was also observed. We used the interpolated cross-c...

This paper presents results derived from analysis of new spectroscopic and photometric observations of the chromospherically active binary system CF Tuc. New high-resolution spectra, taken at the Mt. John University Observatory in 2007, were analyzed using two methods: cross-correlation and Fourier–based disentangling. As a result, new radial velocity curves of both components were obtained. Th...

Several physical properties and the isobaric vapour-liquid equilibria at 101.32, 50, 30 kPa were measured for binary system consisting of acetone ionic liquid 1-ethyl-3-methyl-imidazolium acetate. Liquid-liquid equilibrium data also temperatures from 298.15 up to 328.35 K atmospheric pressure. An hourglass-shaped miscibility gap was found. The simultaneous correlation both VLE LLE regions 101.3...

Abstract The discovery of superconductivity in hole-doped infinite layer nickelates, R NiO 2 ( = Nd, Pr, La) has resulted sustained interest the field. A definitive picture low-energy many-body states not yet emerged. Here we provide insights into physics, based on our embedded dynamical mean-field theory calculations, and propose a correlation U )-temperature T ) phase diagram. key features ar...

Previous first-principles calculations of the melting properties of Si, based on the local-density approximation ~LDA! for electronic exchange-correlation energy, underpredict the melting temperature by ;20 %. We present new first-principles results indicating that a large part of this problem is due to noncancellation of exchange-correlation errors between the semiconducting solid and the meta...