Dynamic behavior of HTSC opening switch models controlled by short over-critical current pulses

Dynamical properties of thin epitaxial film of YBa₂Cu₃O₇ HTSC-opening switch models under action of short overcritical current pulses were measured to test this method of control of fast (of nanosecond range) high-power opening switches for accelerator applications

Singular potentials and annihilation

We discuss the regularization of attractive singular potentials $-\alpha _{s}/r^{s}$, $s\geq 2$ by infinitesimal imaginary addition to interaction constant $\alpha_{s}=\alpha_{s}\pm i0$. Such a procedure enables unique definition of scattering observables and is equal to an absorption (creation) of particles in the origin. It is shown, that suggested regularization is an analytical continuation of the scattering amplitudes of repulsive singular potential in interaction constant $\alpha_{s}$. The nearthreshold properties of regularized in a mentioned way singular potential are examined. We obtain expressions for the scattering lengths, which turn to be complex even for infinitesimal imaginary part of interaction constant. The problem of perturbation of nearthreshold states of regular potential by a singular one is treated, the expressions for level shifts and widths are obtained. We show, that the physical sense of suggested regularization is that the scattering observables are insensitive to any details of the short range modification of singular potential, if there exists sufficiently strong inelastic short range interaction. In this case the scattering observables are determined by solutions of Schrodinger equation with regularized potential $-(\alpha_{s}\pm i0)/r^{s}$. We point out that the developed formalism can be applied for the description of systems with short range annihilation, in particular low energy nucleon-antinucleon scattering.Comment: 10 page

Forming of precision thin-wall hollow electron beams for microwave generators

The electron gun producing the precision hollow relativistic electron beam for coherent microwave generator applications has been developed and tested. It is based on the large non-adiabatic compression of the beam emitted by ring-shaped cathode with an active surface big enough to produce a wanted current level. Further improvement of beam quality is possible by decreasing of the width of the annular emitter and increasing its emissive power

Digitalization of housing and communal services using the example of apartment buildings

The possibility of digitalization of housing and communal services is mathematically considered using the example of apartment buildings. The approaches discussed in the paper can be used in the construction of new apartment complexes, as well as in the overhaul of the existing housing stock. In addition, the applied approaches can be easily adapted for use in office buildings and business centers

Artificial intelligence in agriculture as a basis for increasing the competitiveness of Russian enterprises

Digital technologies ensure the competitiveness of agriculture and have the ability to attract investment. They are needed to increase milk yield and improve the quality of dairy products. "Smart Farm" is a fully robotic facility that analyzes the feasibility of production. For example, this analysis indicates the economic feasibility of breeding certain breeds of farm animals. Now milking robots are used all over the world. If the average milk productivity of cows is 5,000 liters per year, then due to the introduction of modern technologies, the result can be up to 12,000 liters per year. Another plus is the fact that the production process can take place without the presence of an operator. A smart farm is a fully automated process. Such a farm can independently calculate the economic profitability of its production, where the necessary digital technologies are used. Based on the analysis, a decision is made to optimize the production process

Employment in rural areas

Currently, labor relations in modern Russia are regulated on the basis of the Constitution of the Russian Federation (1993), the norms of the Labor Code of the Russian Federation, and other regulatory legal acts adopted at the federal level and in the subjects of the Russian Federation. Legal acts containing employment and labour statutes were also adopted by local self-government bodies until 2006. The rural area is a place of labor and economic activity mainly for residents of rural settlements. The spheres of labor relations are usually agriculture and forestry, and in some regions, subsurface resources management and other types of economic activity. The main legal document regulating the complex of relations, including labor relations, in agriculture is the Federal Law “On the Agriculture Development” and legal acts of agrarian legislation adopted at the level of federal authorities and in the subjects of the Russian Federation. Labor activity in the field of forest management is regulated by the Forest Code of the Russian Federation and regulatory legal acts of forest legislation. Labor relations in other spheres of economic activity in rural areas are regulated by relevant legal acts at the federal level and at the level of the subjects of the Russian Federation. In addition to production organizations in rural areas, there are non-profit entities in which rural residents work. A significant number of the rural population is employed in private subsidiary farmings

Personal subsidiary plots as agricultural producers in the modern regional agrarian economy

Federal Law 264-FZ of December 29, 2006 “On the Development of Agriculture” in article three defines the concept of “agricultural commodity producer”, which recognizes an organization, an individual entrepreneur engaged in the production of agricultural products, their primary and subsequent (industrial) processing (in including on leased fixed assets) in accordance with the list approved by the Government of the Russian Federation, and the sale of these products, provided that the share of the total income of agricultural producers from the sale of these products is at least seventy percent during the calendar year. The following are also recognized as agricultural producers: citizens running personal subsidiary plots, in accordance with the Federal Law of July 7, 2003 No. 112-FZ “On personal subsidiary plots”

A Cerenkov free electron laser with high peak power

A Cherenkov FEL can be a suitable source for radiation from the millimeter wavelength region down to the far infrared. With only a few different dielectric materials the laser can range from 6 mm down to ¿ 600 ¿m. Nonlinear theory shows, for an amplifier configuration, power levels of about 100 kW in the far infrared up to several MW at millimeter wavelengths. Good coupling with the evanescent wave supported by the dielectrically lined waveguide requires a thin walled annular beam of good quality. The characteristics of such an electron gun, a special design for a Cherenkov FEL with parameters given in this paper, will be presented