Dynamic viscosities of mixtures of n-butyraldehyde and isobutyraldehyde over wide ranges in the state parameters

Dynamic-viscosity measurements are reported for liquid mixtures in the system formed by n-butyraldehyde and isobutyraldehyde.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 48, No. 2, pp. 321–322, February, 1985.     

Increase in the filtration capacity of the bottomhole zone in the reservoir by wave impact for well stimulation

The possibility of well stimulation via wave impact has been studied. The effect of an increase in the filtration capacity of the bottomhole zone in a reservoir observed during treatment with high-frequency waves has been surveyed.     

Problems of machine mechanics and technology. Prospects of the development of the Blagonravov Institute of Engineering Science

This article presents materials from the presentation made by researchers at the scientific conference of the Institute of Engineering Science (IES RAS). Here, only fragments of nonlinear wave mechanics and wave technologies that give a general understanding are presented very briefly. The second part of the article (which will be published in the next edition) will be devoted to new trends in technology and machine mechanics based on the results of nonlinear wave mechanics and technology, as well as on conventional research areas developed in various subdivisions of Blagonravov IES RAS.     

Obtaining fine emulsions of a controlled level of dispersion by wave methods

New results of experimental studies performed at the Scientific Center of Nonlinear Wave Mechanics and Technology of the Russian Academy of Sciences (NTs NVMT RAN) on the investigation of wave processes in dispersed media, aimed at the application of wave effects for processing and obtaining microheterogeneous emulsions, are presented. The possibility of controlling the drop sizes of the dispersed phase due to variations in the wave processing mode is shown using the example of cosmetic creams. The energy efficiency of the wave method for processing and obtaining the microheterogeneous emulsions is presented.     

Properties of silicon solar cells with a holographic concentrator

The processes of photovoltaic conversion in the silicon solar cells (SE) with р ⁺–n–n ⁺ structure have been studied while lighting with the holographic concentrator. The dependences of the open-circuit voltages, short circuit current of the solar cell on the lighting level in the range of the solar flux concentration 1–10 units without special cooling.     

Some problems in measuring thermal conductivity using the coaxial cylinders method. II

The results of an investigation of the thermal conductivity of five liquids using an apparatus based on the absolute coaxial cylinders method are presented. The measurements are made using three different measuring gaps. Procedural problems in measuring thermal conductivity are considered.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 33, No. 2, pp. 275–279, August, 1977.     

Explanation of Non-linear In-Plane Resistivity and Hall Coefficient in the Normal State of Cuprates: Polaronic Approach

We present a theoretical study of the in-plane resistivity ρ _{a b} (T) and Hall coefficient R _H (T) within the polaronic model and precursor pairing scenario by considering a two-component charge carrier picture in the normal state of high-temperature superconducting cuprates (HTSC). Here, we use a Boltzmann-equation approach and extended BCS-like model to compute ρ _{a b} (T) and R _H (T) in the τ-approximation. The opening of the pseudogap (PG) in the normal state of the cuprates should affect their transport properties. We have found that the transition to the PG regime and the effective conductivity of charge carriers in the normal state are responsible for the pronounced non-linear temperature dependence of ρ _{a b} and R _H . With the two-component model analysis, we conclude that the opening of the BCS-like PG, while the non-linear temperature dependence of ρ _{a b} and R _H could be understood as a consequence of pairing fluctuations in the PG state of cuprate superconductors. The calculated results for ρ _{a b} (T) and R _H (T) were compared with the experimental data obtained for various hole-doped cuprates. For all the considered cases, a good quantitative agreement was found between theory and experimental data. We also show that the energy scales of the binding energies of charge carriers are identified by PG crossover temperature on the cuprate phase diagram.