Home – Home – Jornals – Advanced Search

The paper focuses on presumable sources of coarse carbonate material transported into the Visean Northern Kharaulakh basin. The sand to pebble components of the Krestyakh conglomerate unit originated by medium and distant transport by debris flows (turbidity currents) along submarine canyons from the place of their initial littoral deposition to relatively deep accommodation basins. The carbonate material was most likely derived from Ordovician, Silurian, and Devonian sediments, which are currently represented by their analogs in Kotelny Island. The sediments of the Northern Kharaulakh basin store a record of two geological events: (1) middle Visean collision of Siberia with the Laurussian supercontinent and rifting of some terranes off the Siberian сraton and (2) late Visean collision of the Kara terrane with the northern margin of Siberia.

This paper proposes a new method for investigating the elastic properties of bio-relevant films, based on the study of object deformation under the action of a steel ball, used as an intendor, placed in a magnetic field. Varying the distance between the magnet and the steel ball allows varying the amount of the applied force in a wide range, which opens up a great potential of the proposed method for studying a large class of biologically relevant objects. The capabilities of the proposed method are demonstrated by an example of determining Young's modulus of hydrogel films of different stiffness, made on the basis of gelatin.

In a new Russian kilogram mass standard based on the Watt balance, it is proposed to use an interferometer for measuring the displacements and velocities of the electromagnetic coil and the proofmass in the vertical direction. Based on the formalism of Jones matrices, the paper describes the optical scheme of a three-channel homodyne displacement interferometer with a quadrature principle of phase detection. The results of modeling an algorithm for compensating for nonlinear effects arising from quadratic detection of interference signals are considered. The results of experimental studies of the layout of a homodyne quadrature displacement interferometer are presented, and it is shown that the displacement measurement error according to the PV criterion does not exceed 0.2 nm.

Functioning of the system for automatic focusing of technological lasers on optical 3D surfaces, implemented in the optical recording head of the LGI-2 model laser image generator, is analyzed. The reasons for serious restrictions on the allowable inclination of the recording surface are discussed. An alternative solution is proposed that makes it possible to significantly increase the permissible angle of inclination of axisymmetric surfaces on which the topology of microstructures should be recorded.

For quantitative assessment of the spectral sensitivity of matrix photodetectors, the authors propose a method based on Fourier transforms for a more detailed analysis of characteristics in the frequency and time domains by the value of the broadband index, the shape of the pulse (time) characteristic curve, the degree of vibration, the value of the damping coefficient, and the energy losses. A strong influence of the electron-phonon interaction in a semiconductor on the formation of noise in matrix photodetectors relative to the human eye is found.

Based on the use of the methods of mathematical statistics, in combination with the use of evolutionary-genetic and systemic-cyclical approaches to the study of the dynamics of the average annual growth rates of indicators of innovation activity in the mega-regions of the United States in the space-time continuum, tendencies of mega-regionalization at all stages of the innovation cycle and implementation are revealed. innovative product. The quantitative accumulation of results characterizing the innovation process during periods of qualitative change in the structural phases of the American accumulation cycle and technological orders in 1961-2020, correlated with each other, contributes to the understanding of the evolution of the US mega-regions as self-sufficient entities that determine civilizationally necessary social phenomena - innovation and the knowledge economy.

The article presents a new method for constructing confidence intervals. A formula obtained on the basis of Chebyshev's inequality is used, it is applied in the recurrent method in the case of unknown variance. A new method for describing the direct and inverse Laplace functions is proposed. The developed methods can be used not only for normal distribution, but also for any other, as well as in the case when the type of distribution law of a random variable is unknown. The practical implementation is shown by a concrete example of calculating the confidence interval for the student's score obtained from the test results.

The article deals with the key theoretical aspects of concession agreements, domestic and foreign experience in the implementation of concessions. It presents the classification of countries by degree and number of concession agreements, as well as by type of contracts. The dynamics of concession agreements in Russia from 2016 to 2020 and the distribution of concluded contracts by socially important sectors of the economy of the Russian Federation from 2009 to 2019 are considered. Forecasts are given for the development of the concession market and possible ways of attracting private investment during the post-pandemic crisis caused by coronavirus (COVID-19).

The article considers the preferences received by all participants of financial transactions in the course of implementation of digital technologies. It identifies the opportunity to modify the general marketing banks strategy based on digitalization and, as a result, to change the entire bank system configuration towards the strengthening of corporate banking structures through the creation of digital ecosystems. It was proved that corporate reliability of digital ecosystem in the market of banking services was ensured by absolute minimization of credit and other financial risks, total elimination of bank fraud. The formation of digital ecosystem in DPR based on the institution of Central Republican Bank (CRB) was suggested. It is substantiated that creation of the CRB DPR ecosystem will secure working capital for enterprises and other business entities of this old industrial region and will increase the efficiency of local authorities in provision of social and other essential services to the public.

Small-serial and individual machine building enterprises, due to their specific features, often experience difficulties in implementing classical principles and the methods of management described in economic science, including the field of product sales management. Meanwhile, planning and organizing products sales are key functions of sales management to achieve primary goals of business. The article presents a methodology for the improvement of planning and organization of product sales through a detailed analysis of its indicators, according to data of the operating machine building enterprise.