Computer security is one of the key tasks of our time. Attacks on equipment in the network are constantly and leave large damages in the integrity of the data. There are many methods of computer security, one of which is the method of security through obscurity. The article analyzes the actions of system administrators to ensure server security using the “security through obscurity” method.

Keywords: computer security, security through obscurity, cryptography, decoding, setting up web servers

Fire-retardant gypsum solutions on exfoliated vermiculite were studied using volcanic ash and the multi-functional additive D – 5. It was revealed that the introduction of the D-5 additive by weight from the binder significantly speeds up the setting time of the composite gypsum solution on the expanded vermiculite. gypsum-vermiculite solutions with additives of Portland cement and D – 5 have a higher water resistance.The compositions of composite gypsum solution on exfoliated vermiculite and ash have been developed. It has been established that volcanic ash of a fraction of 0.0–0.315 mm can be replaced by expanded vermiculite without a noticeable increase in average density. Additives of Portland cement and D – 5 increase the strength of the gypsum composite vermiculite solution with ash, the softening coefficient of the composite increases to 0.75.

Keywords: gypsum, portland cement, expanded vermiculite, volcanic ash, additive D-5, fire protection, gypsum vermiculite solution, tensile strength at bending and compression, average density, softening coefficient

The article deals with the problem of pedestrian crossings and congestion of highways of the city of Volgograd. It described the situation on the highways and solutions to eliminate congestion on the road. Car traffic was conditionally divided into 3 categories: transit, the transit from the center and the car flow moving into the center. Studied the question of the safety of pedestrians on the road, because, except for pedestrians with the intersection increases their safety. The study and analysis of all previously implemented measures was proposed construction of underground pedestrian tunnels. Several embodiments of tunnel junctions have been considered. Analysis of the current transport situation revealed the busiest places in the city center.It was noted that the construction of underpasses solve the problem of vehicular traffic in the city center and pedestrian safety, and the city will have new underground space.

Keywords: Сar flow,highway, tunnel transition, transit transport, carriageway, longitudinal,security,road traffic

The task of real-time identification of control objects is relevant and in demand at the stages of auto-tuning and self-tuning of regulators. Modern industrial controllers have sufficient computational capabilities to implement adaptive control. The article discusses two approaches to obtaining the impulse transfer function of an object: by the least squares method and directly by the transient response. Least square identification is applicable for a wide class of objects, including oscillatory objects. But this method requires a fairly large amount of computational resources, which imposes a limitation on the speed of the object. The direct identification method for transient response requires significantly less computational resources, but is applicable for aperiodic objects. Algorithms are implemented in the form of programs for industrial controllers and can be used both at the stages of preliminary identification of control objects and at the stages of autotuning typical PID controllers and controllers in the state space.

Keywords: adaptive control, pulse transfer function, least squares method, transient response, PID controller, programmable logic controller, state variables control, programming language ST, prorgamming language C, CoDeSys

The results of the calculation of installations for reducing the level of air pollution from dust and gas emissions from the Bzugu wastewater treatment plant are given. The aerodynamic calculation of pipelines of the system for cleaning dust and gas emissions and the calculation of prevented environmental damage during the implementation of the proposed environmental measures have been performed.

Keywords: dryers, dust and gas emissions, dust, ammonia, turboscrubber, Yatagan gas convector, axonometric scheme

The features of natural water reagent treatment are considered. The evaluation of the efficiency of coagulants, the most frequently used in the Russian Federation, rational methods of their introduction into the treated water is given. A method of water treatment is proposed, which allows to use the advantages and minimize the disadvantages of mineral coagulants. Experimental data confirming the effectiveness of the proposed method of concentrated coagulation using a mixed coagulant are presented.

Keywords: water of superficial sources, coagulant, sulfate aluminum, aluminum polyoxychloride, the concentrated input of a coagulant

The article proposes the use of a table processor to reduce the complexity of applying the probabilistic paper. Based on the written methodology, the measurement results were processed. Further ways of developing the methodology are suggested.

Keywords: metrological assurance, probabilistic paper, normal distribution law, OpenOffice Calc, MS Excel

the article presents a possible concept of improving the flat solar collector in order to intensify the heat exchange process, which increases the quality and efficiency of the equipment under consideration. A brief description of the proposed configuration of the device is given. The positive aspects of such technology are described

Keywords: energy saving, heat exchange process intensification, independent heating circuit, irrational energy consumption

the article considers the possibility of increasing the efficiency of the solar collector by improving its heat exchange panel, which is implemented by optimizing the heat exchange processes using the concept of combining the thermal properties of different metals. The positive aspects of this method are described. A brief description of the comparative analysis is given

Keywords: heat exchange panel, energy saving, solar installation, alternative energy sources, thermal properties, heat transfer optimization, solar collector, heat exchange intensification

The article reveals the role of the information space in modern education. The conclusion is made that it is important to correctly assess the possibilities of a new type of information-digital space, fight not only its shortcomings, but also create the necessary conditions within the framework of pedagogical education for actualizing and shaping the future teachers of positive, socially significant features that are in demand in the 21st century .

Keywords: information, information-digital space, information technology, student, digital literacy, technological tools, computer programs, digital technology, multimedia product

The following work is concentrated on the analysis of dynamic pressure distribution of a brake pad by using ANSYS software. A non-linear contact analysis of brake disc has been performed using Finite Element Method. The finite element model of disc and pads have been developed, and followed by an inclusive simulation of the contact analysis of disc brake system using ANSYS software. A detailed finite element model of a disc brake assembly was developed. Contact analysis was done to determine the pressure distribution, interfacial contact area and normal contact forces under both frictionless (μ=0) and frictional braking conditions. The influence of varying friction coefficients and the brake hydraulic pressure on squeal occurrence is examined. The results illustrated that the contact pressure distribution and the magnitude of normal contact pressures are far greater towards the leading edge of the pads comparing to the trailing edge.

Keywords: метод конечных элементов, распределение давления, контактное давление, шум, тормозная система , нелинейный контактный анализ

The analysis of the influence of heating on the depth of polymerization of composite materials of light curing is carried out. An electronic micrometer was used to measure the polymerization depth. The greatest difference in the depth of polymerization before and after heating was obtained from Filtek ULTIMATE "3M ESPE" composite material. The smallest difference in the depth of polymerization before and after heating of Nexcomp "MetabioMEDCo". After heating, the plastic and flow properties of the materials are improved, which improves the adaptation to the walls of the cavity during the restoration.

Keywords: Light-cured composite materials, polymerization, heating of composites, micrometre

The paper presents the characteristics of wind and solar resources of the Southern Federal District on the basis of which the assessment of the prospects for introducing innovative innovations such as perovskite photovoltaic cells and Vertical-axis wind turbines into the process of district energy production is given.

Keywords: Vertical-axis wind turbines, alternative energy source, wind power, wind turbine, renewable energy source, perovskite photocell, solar battery, solar energy, energy resources of the Southern Federal District, energy saving

In this paper, an analysis of the problems and tasks arising from the design of situational awareness tools has been carried out. As a result, it has been established that the approaches in this area do not satisfy the requirements for modern intelligent tools for operational decision support for the reasons for the lack of methods and tools reflecting the dynamics of information processes and a distributed information processing architecture with weakly structured properties. The methods of operating and extracting knowledge from semistructured dynamic information are proposed.

Keywords: Situational awareness, poorly structured data, temporal information, dynamic structures, intellectual analysis

The analysis of reliability of systems of an electricity transmission during which the main causes of the power outage in the consumer were identified. With the help of computer simulation, the results of operation of autonomous inverters are obtained with different number of voltage levels. The prospects of using the devices for balancing the incomplete-phase regimes on the basis of multilevel voltage inverters, which improve the reliability of power supply to consumers, are considered.

Keywords: analysis, stream of the failure, electricity, the balancing device, emergency operation, recovery time, failure, reliability, multilevel inverter, power line, user