In the conditions of construction, the tasks of laying, replacing or repairing underground utilities are unavoidable. Currently, the vast majority of these works are carried out in an open manner. Often, especially in urban construction, it is necessary to remove part of the asphalt pavement. Depending on the strength of the material, the thickness of the coating, the required amount of work and the resources of construction organizations, various machines and technologies for removing asphalt concrete are used. The vast majority of machines currently used for cutting process joints in asphalt concrete surfaces implement the working process of milling or abrasive cutting, which is characterized by high energy consumption, requires the use of special equipment and cutting tools. These and other factors have a significant impact on the cost of work.

The paper studies the effect of mechanochemical activation on the elemental composition of shungite rocks of the Koksu deposit. The use of nanostructured shungite powder in sorbents can lead to an improvement in their sorption properties. As a result of mechanochemical activation in samples of shungite rocks of carbonate and shale origin, the mass fraction of carbon decreases, and the mass fraction of silicon increases. The composition of the rocks also increases the content of oxygen, aluminum and iron, which improves the sorption properties of shungite. A decrease in the speed of rotation of the balls leads to a slight change in the content of elements, a decrease in the content of carbon, oxygen and sodium is observed, and the content of silicon, aluminum, iron and potassium increases. An increase in the ratio of the sample mass to the ball mass from 1:1 to 1:3 at a grinding

The main purpose of the work is the circuit simulation of failures of on-board electronic equipment of spacecraft (SC) for various purposes under specified conditions and the parameters of the transistors of the memory element during the passage of a single cosmic ray particle (CR). Actuality of the problem. It is known that during the operation of spacecraft for various purposes, as a result of the impact of cosmic rays (CR), on-board electronic systems fail, which leads to abnormal situations, and in some cases to the loss of satellites, for example, KazSat -1 and Phobos-Grunt. Therefore, this paper uses the method of circuit modeling, which is a highly efficient and relatively low-cost method that allows us to evaluate the circuit parameters of the transistors of the memory element during the passage of a single cosmic ray particle. In this paper, we present the results of circuit failure modeling (SEU and SEL) under radiation exposure to storage devices (memory), which was carried out on the CMOS structure, which is the dominant one in the manufacture of ICS.

A special design of the die was developed, which allows to implement the process of severe plastic deformation by high pressure torsion to deform ring blanks, which will be the starting material for creating high-strength piston rings. A special feature of the die design is the provision of torsion of the deforming tool with constant rectilinear movement of the press punch due to the composite deforming tool, which includes both displacement and rotation blocks. Using the obtained geometry, computer simulation of this process in the Deform program was performed in order to assess the possibility of a stable process flow. AISI-316 austenitic stainless steel was chosen as the material of the billet. The resulting strain force on the first two cycles was considered. On the first cycle, the force was equal to 464 kN, on the second cycle the force value was about 1200 kN. The obtained values are quite adequate, which indicates the possibility of multi-cycle deformation.

A mathematical model of a frequency-controlled asynchronous electric drive is proposed, which makes it possible to study electromagnetic and electromechanical processes in an electric drive with any drive mechanism. The block diagram of algorithms of calculations performed in the computer application "Mathcad", the results of modeling and their analysis are presented. Currently, the most massive consumers of electrical energy are electric drives based on asynchronous electric motors (AM). At the design stages of new and modernization of existing electric drives with IM, an important place is occupied by mathematical modeling of the object. The mathematical description of the electromagnetic and electromechanical processes of an asynchronous electric drive has been known for a long time. So, in [1], a model of an asynchronous drive for centrifugal mechanisms with a quadratic dependence of the moment of resistance on speed is proposed. The authors propose the universalization of the mathematical model of the electric drive in order to use it for mechanisms with any moment of resistance.

The article provides an overview of cloud computing and services provided on the basis of its virtual technologies. Technological progress has affected all areas of people's lives. In the world of information technology, several thousand services and projects are created every month. More and more companies are switching to cloud services to improve the performance of local projects, to improve their architecture and infrastructure of the company, to save budget and time. The massive transition to cloud computing creates the illusion of one hundred percent security of user’s personal data in cloud storage. Each user's personal information is confidential, so cloud systems must ensure the integrity and reliable protection of user data. This article analyzes security measures in cloud computing.

In this article, research is aimed at studying the quality and safety of non-traditional raw materials for the production of ethyl alcohol. Solving problems related to the environmental situation, and the final product, the cost and quality of which fully meets the requirements of consumers and determines its competitiveness, are essential criteria for the successful operation of the enterprise in a tough market competition. Assessment of the situation in the alcohol industry of the Republic of Kazakhstan shows that the main raw materials in the production of ethanol are various types of grain crops, the leading place is given to wheat and rye. Grain resources are widely used multifunctional raw materials, which leads to competition with other consumers, as a result of which distilleries may experience difficulties in supplying raw materials. In General, the alcohol industry is characterized by low profitability, significant energy and material consumption, and serious dependence on raw materials. This fact confirms the prospects for expanding the raw material base of the industry by involving non-traditional types of raw materials in production, which makes it possible to level the risks when purchasing raw materials.

This study presents the results of the selection of the most technologically and cost-effective compositions of wear-resistant Fe-C alloys for parts of industrial equipment and their production technologies. The article also considers the main types of existing wear-resistant steels and cast irons, shows their compositions and properties, describes the main advantages and disadvantages. From the point of view of economic benefits and simplicity of technology, one of the most effective for casting parts subjected to intense impact and abrasion is half nodular cast iron obtained as a result of low alloying with chromium and subsequent modification with a magnesium-containing additive. The main advantage of this alloy, which determines its high wear resistance, is that in this case, in the structure of the outer surface layer of the casting, carbon is in the form of finely dispersed carbide inclusions doped with chromium and manganese, which ensures high hardness and resistance to abrasive wear, and in the inner deep layers Castings carbon is in the form of spheroidal and vermicular graphite - this provides an increased impact toughness of the alloy.

This paper shows the applicability of the Bjerrum-Guggenheim osmotic coefficient for calculating the features of the crystallization fields of the Cr-Fe binary system. To determine the applicability of the Bjerrum-Guggenheim osmotic coefficient, the dissolution heats and activity coefficients of chromium and iron in a Cr-Fe melt with an atomic content of chromium in the range of 0-100% were calculated on the basis of the Cr-Fe system state diagram, in addition to the previously performed calculations, at temperatures from 2103 K to 1780 K (on the chromium side) and from 1812 K to 1780 K (on the iron side). The calculation predicts positive deviations of the Cr-Fe system from Raoul's law, as well as in the case of the osmotic coefficient, which confirms the reliability and adequacy of the approach from the perspective of the Bjerrum-Guggenheim concept when extracting information from state diagrams. It should be noted that calculations based on regular solutions can mainly be used for systems that do not form a series of solid solutions, which is also one of the disadvantages of this method.

Nanoporous membranes based on metal oxides are widely used for the formation of nanostructured materials, since it is possible to create materials with predetermined structural properties. In this research work, the structural features of nanoporous membranes based on titanium and aluminum oxides, which are combined by the production process, but differ in the growth of pores and their structure. Membranes based on metal oxides were synthesized at a voltage of U=80-140V, at room temperature T=17°C, in an acidic environment. The structural features of the synthesized membranes were studied using Quanta 200i 3D scanning electron microscopy (FEI). It was found that titanium dioxide films have a narrow pore distribution, the sizes of which are in the range of 40-115 nm. Structural differences between titanium oxide and aluminum oxide nanomembranes make it possible to be widely used in the field of nanotechnology and materials science.