The possibilities of using volcanic tuff as an additive in pressed cement-mineral composites intended for road construction are studied. The influence of low-modulus mineral additives of trepel, granulated blast furnace slag and volcanic tuff on the physical and mechanical properties of hardened composites is studied. The rational compositions of the molding masses of the optimal structure of cement-mineral composites providing the improvement of physical and mechanical properties are determined.

Keywords: small-piece pressed products, hard pressing, cement-mineral composites, paving slabs, screenings, volcanic tuff, trepel, granulated blast furnace slag, structure-forming additive, decaying strength

The problem of increasing the coding and decoding speed of Reed-Solomon codes (RS-codes) is considered. The implementation of the Open JPEG encoding system library was chosen as a base implementation for comparison. This task is considered for an x86-64 environment. The paper proposes ways to improve performance both when using a standard set of instructions and when using vector instructions from the SSSE3 and AVX2 sets. A technique for comparing the speed of encoding / decoding RS-codes is described using the example of the developed library and the basic implementation in Open JPEG. An experimental study of the relationship between the parameters of RS-codes, the encoding / decoding rate, and the set of instructions used is carried out. It is shown that for any RS-code it is possible to significantly increase performance even on a standard set of instructions. A method is proposed for the dynamic selection of the encoding acceleration method depending on the instructions supported by the target computer and the parameters of the used RS-code.

Keywords: anti-noize coding, Reed-Solomon codes, speed, vector instructions

The article offers schemes and models that allow using formal parameters and procedures to expand the capabilities of cognitive modeling and increase the level of adequacy of decisions made based on the results of modeling. The paper presents various variants of modeling schemes, which allows the researcher to perform a more versatile analysis of the system, including the analysis of dynamic effects, as well as the selection of parameters of control actions that provide the desired level of system response.

Keywords: dynamic influence, control, simulation, formal cognitive model, formal neurocognitive network of f-euroconcept

Based on the results of engineering and geological survey of real construction sites in Rostov-on-Don and the Republic of Kalmykia, the dynamics of subsidence processes on laboratory samples of loess soil tested for compression according to the "one curve" scheme according to GOST 23161-2012 was studied.

Keywords: subsidence, compression compression, odometer, loess soil, subsidence pressure, surveys, geomechanics, soil mechanics

A method for increasing the production efficiency of ultra-lightweight refractory products is proposed, by optimizing the technology for preparing foam, which allows to release the products from the forms immediately after they are installed for drying. The plastic-viscous characteristics and stability of the foam can be increased by its mineralization, i.e. by introducing fine mineral substances into the foam-forming solution

Keywords: foam mass, mineralization, ultimate shear stress, plastic-viscous characteristics, ultra-light refractories, aluminum-potassium alum

the article describes a variant of setting sequential algorithms in the form of bipartite graphs by further defining them, which makes it possible to work with algorithms using graph theory methods in the future. Two forms of the task are considered: modular and functional-predicative. The possibility of setting the algorithm in table-predicate form is shown. It is concluded that in addition to the generally accepted methods of setting the algorithm, it can be set in matrix-predicate or table-predicate form, which allows using methods of matrix theory and methods of predicate theory when working with algorithms. setting the algorithm in matrix-predicate form avoids isomorphism when performing algebraic and set-theoretic operations on it.; setting algorithms in matrix-predicate form allows you to perform almost any operations on them

Keywords: graph-algorithm scheme, sequential algorithm, predicative block, functional block, pre-definition, bipartite graph, table-predicative form, graph theory, isomorphism

There is an analysis of the urban development location and the capacity of public spaces for cultural and educational purposes was carried out using the example of cultural centres for Volgograd. The normative and actual material security is determined separately for each administrative district and whole sity. There are suggestions on the advisability of erecting new cultural objects.Dynamics of modern cities is taking into account.

Keywords: planning, cultural centre, cultural and social structure, standard of material security, actual material security

The paper is based on a review of the scientific publications released from May through October 2019, the greater part of which, namely 14 papers, is included in the Web of Science scientometric database. The authors of the papers analyzed explore the construction industry problems over the past 5 years. The foreign studies listed in the reference section were based on the analysis of reviews falling in the above-mentioned timeline. The purpose of this paper is to identify the problems hindering the implementation of BIM technologies in the construction sector, not only in the foreign countries, but also in Russia.

Keywords: building information modeling, construction organizations, critical problems, external factors, absence of organizational support

The calculation algorithm is given and various options for solving the problem are considered when changing the parameters of the design scheme of the rod system on the example of a beam in the MS Excel software environment together with the MathCAD package. The proposed approach allows you to combine formulas, graphics, and calculation results on a single sheet, which is especially useful in the educational process. It contributes to a more conscious perception of the calculation process by students, allows them to implement various forms of distance learning in information technologies.

Keywords: the core of the system, algorithm, modelling, integration, information technology

The directions of modern research in the field of adaptive error correction, which can be applied when transmitting images in JPEG 2000 format over a noisy channel, are examined. Adaptive correction at the network level allows you to maintain a given percentage of packet delivery. Uneven protection at the application level is intended for use in broadcast broadcasts and allows the consumer to receive an image of various quality depending on the state of the network. Adaptive uniform protection at the application level is focused on point-to-point transmission and is aimed at receiving the maximum image quality by the receiver. The network layer tools discussed can be combined with the application layer tools.

Keywords: adaptation, noise-proof coding, forward error correction, noisy channel, JPEG 2000

The article considers the results of development of water treatment technology for household drinking water in Semey, presents a comparative analysis of widely used disinfectants, and considers technological schemes for water disinfection with chlorine dioxide and a combined disinfectant " chlorine dioxide and chlorine".

Keywords: household drinking water, disinfectants, chlorine

To date, the socio-economic situation in the country creates for the population quite significant obstacles in the implementation of tasks for the purchase of housing and other real estate through mortgage lending. However, when it comes to collecting the amounts owed on the loan, banks are faced with an analysis of the prospects for the sale of mortgaged property, as a result of which, in most cases, come to the conclusion that the original sale price of the mortgaged property with the realities of the market. In the article, the authors consider the judicial practice of determining the initial price of the mortgaged property and analyze the situation in which there is a need for judicial value examination, as well as give the main aspects of the methodology of this type of expertise. The purpose of the article is to form a clear idea of the reader about the process of resolving the dispute arising from the breach of obligations under the loan agreement.

Keywords: expert, forensic examination, subject of pledge, cost examination, assessment report, methodology

The construction of social infrastructure is an integral part of improving the quality of life. The study systematized the main problems faced by the developer and the state in the construction of social infrastructure, provides an approximate list of measures that can improve the situation.

Keywords: social infrastructure, state, developer, economy, residential complex, public-private sector, housing construction, state, operation

The mining industry, as well as the socio-economic development of this sector, makes a significant contribution to the development of the economy of some low-and middle-income countries rich in non-fuel minerals, as evidenced by the modified mining contribution Index (IVGP-BP). 10 of the 20 countries in which the mining industry contributes the most (the highest GPI-BP) rose one or two positions higher, according to the world Bank's country classification, between 1999 and 2019. Based on detailed data from the mining sector, such as mining, exports, prices, rents for mineral resources, mineral exploration expenditures, and state budget revenues, the current situation for 2019 is analyzed, as well as trends regarding the contribution to the development of the socio-economic level of the mining industry for 1999-2019.

Keywords: mining, minerals, industry, economy, export, mineral rent, gold, coal

The article deals with organizational and technological features of construction project management based on BIM-modeling. The methodological approach with the use of information modeling technologies, based on the account of time and resource constraints, which will improve the efficiency of construction project management, is proposed

Keywords: Organizational and technological features, construction projects, BIM-modeling, management, efficiency, planning, construction organization