Guest Artist Octubafest Recital: David Zerkel, tuba with Anatoly Sheludyakov, piano

KSU School of Music presents Guest Artist Octubafest Recital featuring David Zerkel, tuba and Anatoly Sheludyakov, piano.https://digitalcommons.kennesaw.edu/musicprograms/1288/thumbnail.jp

Optimizing of Cottonseed Oil Hydrogenation over Fixed Bed Catalyst with Use of Kinetic Simulation

Effect of temperature, hydrogen and oil flow rates on the quality of the products of cottonseed oil  hydrogenation was investigated for different Ni-Al catalysts promoted with Ti, Cr, Mo, Cu, Fe. Fixed bed  catalyst is used to exclude filtration stage from the technological flow sheet. Surface of the catalyst granules  was preliminary leached to increase the area. Linear correlation between melting point and iodine value of the products was revealed, and correlation coefficients for different catalysts have been established. It was found out that minimum melting point and maximum hardness corresponds to the products with the following fatty acid composition: 5% of stearic acid, 45% of oleic acid and 20% linoleic acid. Comparison criteria for the catalysts with use of kinetic model were discussed, and 60% conversion of linoleic acid was selected as the optimum level for hydrogenation process to target products. Introduction of copper, iron and molybdenum in the Ni-Al-Cr-Ti alloy (Basic alloy) allows increasing activity and selectivity of the catalysts. In optimum conditions at 180 °С the row of activity of the catalysts is as follows: Fe > Mo > Cu > Basic alloy and the row of selectivity: Cu > Fe > Bas > Mo

Guiding and Trapping Electron Spin Waves in Atomic Hydrogen Gas

We present a high magnetic field study of electron spin waves in atomic hydrogen gas compressed to high densities of 10^18 cm^-3 at temperatures ranging from 0.26 to 0.6 K. We observed a variety of spin wave modes caused by the identical spin rotation effect with strong dependence on the spatial profile of the polarizing magnetic field. We demonstrate confinement of these modes in regions of strong magnetic field and manipulate their spatial distribution by changing the position of the field maximum.Comment: 5 pages, 4 figure

Guiding and Trapping of Electron Spin Waves in Atomic Hydrogen Gas

We present a high magnetic field study of electron spin waves in atomic hydrogen gas compressed to high densities of similar to 10(18) cm(-3) at temperatures ranging from 0.26 to 0.6 K. We observed a variety of spin wave modes caused by the identical spin rotation effect with strong dependence on the spatial profile of the polarizing magnetic field. We demonstrate confinement of these modes in regions of strong magnetic field and manipulate their spatial distribution by changing the position of the field maximum

Searching for magnetostatic modes in spin-polarized atomic hydrogen

We consider a possibility of the magnetostatic type spin waves driven by a long-range magnetic dipole interactions, to account for the peaks in the ESR spectra observed in our previous work (Lehtonen et al 2018 New J. Phys. 20 055010). The Walker equation for magnetostatic modes is solved for a cylinder of atomic hydrogen, first in a uniform magnetic field and second in a linearly decreasing magnetic field. The frequency behavior of the solved modes with length of the cylinder and density of the gas is compared to experimental data. We conclude that magnetostatic modes are unlikely to account for the observed modulations of ESR spectra

Guiding and trapping of electron spin waves in atomic hydrogen gas

We present a high magnetic field study of electron spin waves in atomic hydrogen gas compressed to high densities of ∼1018cm -3 at temperatures ranging from 0.26 to 0.6 K. We observed a variety of spin wave modes caused by the identical spin rotation effect with strong dependence on the spatial profile of the polarizing magnetic field. We demonstrate confinement of these modes in regions of strong magnetic field and manipulate their spatial distribution by changing the position of the field maximum. © 2012 American Physical Society