Heat transfer on boiling a Freon-22-dibutyl phthalate solution

Experimental data on the boiling heat transfer of a Freon-22-dibutyl phthalate solution have been obtained on a special apparatus. The dependence of the heat-transfer coefficient on the heat load, pressure, and solution concentration has been established.     

Geometric relationship between parallel hyperplanes, quadrics, and vertices of a hypercube

In a space of dimension 30 we find a pair of parallel hyperplanes, uniquely determined by vertices of a unit cube lying on them, such that strictly between the hyperplanes there are no vertices of the cube, though there are integer points. A similar two-sided example is constructed in dimension 37. We consider possible locations of empty quadrics with respect to vertices of the cube, which is a particular case of a discrete optimization problem for a quadratic polynomial on the set of vertices of the cube. We demonstrate existence of a large number of pairs of parallel hyperplanes such that each pair contains a large number of points of a prescribed set.     

Upgrade of the resonance ionization laser ion source at ISOLDE on-line isotope separation facility: new lasers and new ion beams

The resonance ionization laser ion source (RILIS) produces beams for the majority of experiments at the ISOLDE on-line isotope separator. A substantial improvement in RILIS performance has been achieved through a series of upgrade steps: replacement of the copper vapor lasers by a Nd:YAG laser; replacement of the old homemade dye lasers by new commercial dye lasers; installation of a complementary Ti:Sapphire laser system. The combined dye and Ti:Sapphire laser system with harmonics is capable of generating beams at any wavelength in the range of 210-950 nm. In total, isotopes of 31 different elements have been selectively laser-ionized and separated at ISOLDE, including recently developed beams of samarium, praseodymium, polonium, and astatine.     

Gas-Phase Treatment of Metallurgical Fly Ash in Nitrating Media to Increase the Recovery of Valuable Components Using the Example of Fly Ash Produced by MMC Norilsk Nickel

Theoretical Foundations of Chemical Engineering - A new approach is proposed to increase the recovery of Ni and Cu from the fly ash formed by roasting the copper–nickel matte in the...     

Correction to: “Measuring the Speed of Data Exchange in Memory Cards Using Programmable Logic Integrated Circuits”

Measurement Techniques - The affiliation of the first author, E. V. Kostikova, is incorrect