A comparative analysis of the lighting conditions of school premises was carried out based on design solutions for lighting devices from three Russian lamp manufacturers. All projects were carried out using lighting devices based on recommendations to manufacturers to use their range of lamps to illuminate various school premises. The design was carried out using the DIALux program. Each of the three manufacturers is widely known to specialists and has established itself as a reliable manufacturer of domestic lighting products, ready to offer a full range of lamps for various school premises. A technical and economic comparison of the total present costs for all lighting installations (using the example of one entire school) made it possible to conduct a comparative analysis and determine the most profitable options. An analysis of the current state of the Russian market of lighting devices recommended by manufacturers for classroom lighting has been carried out, their characteristics have been reviewed, and their compliance with current energy efficiency requirements has been assessed. Conclusions and forecasts have been made for the further development of lighting equipment with LEDs for lighting classrooms, based on the need to constantly improve the modern range of lighting devices in terms of their energy efficiency and competitiveness.

Keywords: technical and economic comparison, levelized cost method, comparative analysis, school lighting, lighting device, lighting modeling, energy efficiency

This article examines the security of currently popular corporate instant messaging applications (messengers). A comparative analysis of the security of some solutions for corporate use has been carried out. The main result of the review is the conclusions about the advantages and disadvantages of the considered systems, which can be used by organizations to choose the appropriate solution.

Keywords: Information security, corporate messenger, messaging, internal communications, instant messaging systems, end-to-end encryption

Wood as a building material has ancient roots and a long history of use. With the development of technology and the desire to live in better environmental conditions, interest in using wood to construct multi-story buildings is growing. This article is devoted to the prospects for the development of wooden multi-story buildings in Russia, in particular with the use of CLT panels, the popularity of which is growing all over the world. Comparative, statistical and logical analyzes were used as research methods. The article discusses modern methods and technologies for the construction of multi-story wooden buildings, including their advantages in terms of ecology, energy efficiency and design, conducts a comparative analysis of buildings made of reinforced concrete and CLT panels, and proposes a technological scheme for the reconstruction of buildings using CLT panels, including adding additional floors. Challenges and prospects for further development of this technology are highlighted, strategic solutions are proposed to reduce the cost of CLT panels

Keywords: clt-panels, wood construction, wooden structures, reconstruction, renovation, high-rise wooden construction

One of the most important points in increasing the conversion component of a web resource is identifying the most attractive places for the site user. To identify these locations, a site user activity data visualization tool was created that provides a visual representation of each user action on a site page.

Keywords: heat map, site, oculograph, fixation, priority area

The proposed work considers two types of neural network models for describing fire risks depending on the size of the population and preventive measures. Neural network models make it possible to consider fire risks integrally, taking into account the type of municipality or separately for each of the three existing types. Based on these models, a response surface for fire risks - population and prevention has been implemented, which allows you to assess the magnitude of risks based on input data to optimize decisions made. For a given value of the standard risk, the dependence of optimal prevention was obtained depending on the number of deposits in the municipality, which makes it possible to guarantee fire risks less than or equal to the standard indicators. The article analyzes and evaluates the effectiveness of preventive measures using neural networks. The input data for training the neural network includes fire data collected in Vietnam and Russia (population, number of fires, number of deaths, number of preventive measures). Based on these indicators, the effectiveness of preventive measures is predicted. Based on the forecasting results, decisions can be made to ensure fire safety in the state. The results obtained indicate the possibility of predicting the absolute value of the effectiveness of preventive work based on quantitative and categorical variables. A relatively large forecast error is associated, on the one hand, with the need to take into account a larger number of input parameters, and on the other hand, with the need to increase the size of the neural network training base. After refining the model, the results obtained allow us to evaluate the effectiveness of preventive measures for provinces and cities.

Keywords: fire safety, preventive measures, neural network, management decision support, prediction model

The public education project ""Dream School"", implemented in support of the federal school overhaul program, attracts students of architectural and design schools in the regions, which will allow them to simultaneously acquire applied competencies in the learning process. During the development of the design project, the need for specialists to conduct a preliminary design analysis was revealed, since one of the five schools did not meet the standards in terms of their spatial planning parameters. It is proposed to carry out the reconstruction of this educational institution. The premises of the dining room and the assembly hall are transferred to the annex block.

Keywords: school design project, school renovation, school recreation, public education project "Dream School", school reconstruction

В статье представляется совершенствование технологии гидроизоляции с помощью инъектирования. Специально для этих технологий разработана полимерцементная композиция для инъекционной гидроизоляции. The article presents the improvement of waterproofing technology by injection. A polymer cement composition for injection waterproofing has been developed specifically for these technologies.

Keywords: technology, production, injection waterproofing, injection method, repair and restoration work, polymer cement composition

The article contains the methodology and results of theoretical and experimental studies of the stress-strain state of a conical radial-beam dome with triangular shell elements. The results obtained by various methods are analyzed and compared. The triangular membrane panel is part of the radial beam dome structure and consists of a support frame and a steel membrane in the shape of a triangle. The shape of the triangle forming the membrane panel can be different and depends on the number of ribs in the radial beam dome. The supporting contour is a compressed-bending element of the dome and is made, as a rule, from a rolled steel profile with a channel section. The membrane is made of thin steel sheet and attached to the upper flange of the channel with self-tapping screws or spot welding. To assess the strength and deformability of a steel membrane sheet, its operation under the action of a uniformly distributed snow load, an unevenly distributed snow load and a concentrated installation load was considered. Several options for nonlinear static calculations in various computer systems are shown.

Keywords: building structures, wooden structures, membrane panel, stress-strain state, radial beam dome, dome, membrane, design, experimental study

The features of the (m,m) implementation scheme of visual cryptography are considered, which differs from the existing ones by the formation of shadow images (shares) of an image containing a secret. The proposed approach is based not on the decomposition of the secret image into shares, but on their step-by-step transformation by multiplication by orthogonal Hadamard matrices. The images obtained during each transformation of the stock are noise-resistant in the data transmission channel.

Keywords: image with a secret, image decomposition, image transformation, orthogonal Hadamard matrices, two-way matrix multiplication, noise-resistant image encoding

The application of orthogonal matrices in information processing and transformation systems is considered. A method is proposed for assessing the results of protective masking of audio information using Walsh-structured quasi-orthogonal Mersenne matrices.

Keywords: orthogonal matrix, message masking, masking/unmasking algorithm, amplitude-frequency response, white noise, root mean square error, signal-to-noise ratio

The issue of using the screen of an aircraft's collimator system as a means of providing a help to the pilot about the vertical profile of the flight path in poor visibility conditions at low and extremely low piloting altitudes is being considered.

Keywords: low flight altitude, extremely low flight altitude, threat of collision, collimator, virtual elevation map, virtual reality, augmented reality, artificial intelligence, data fusion, pilot assistance system

The article examines the epoch-making buildings of the city of Nalchik, which include the educational campus (LUG) and Stalin's dacha. The work provides historical information on these objects, architectural, artistic and planning solutions, their significance for the city. The main purpose of epoch-making buildings, according to the authors, is to preserve these objects for citizens and residents of the republic, as the historical and cultural heritage of the people, which must be recreated for future generations and preserve the recognizable unique image of the city.

Keywords: architecture, epoch-making buildings, facade, plan, building, school, Stalin's Dacha, Dacha N5, bay window, gazebo, brick, brick-wooden house

Issues of the quality of university spaces have not been fully studied at present. Rapid transformations and the growing role of universities in city life require a serious scientific approach to organizing the environment of university campuses. This article examines the artistic and semiotic properties of façade architecture and spatial environments identified by various researchers. Based on the theoretical analysis performed, the aesthetic and informative qualities that are most important for organizing the image of a university campus are formulated. As an example of the practical use of the identified qualities, a developed design solution for one of the buildings of Volgograd State Technical University is presented.

Keywords: university campus, aesthetics of the university environment, informative qualities of facades, reconstruction of educational buildings, architectural semiotics

The main defects of railway structures are identified, the damage of defects is characterized by the degree of influence based on the quality indicators of building structures, a mathematical model for assessing risk and damage is created, expert surveys are conducted on the nature of the conditions for the probability of defects and bringing them to damage, an algorithm for implementing the results on the construction site is presented.

Keywords: risk assessment, probability conditions, concrete works, risk-oriented approach, risk identification

The article deals with a unique historical structure of Karachay-Cherkessia, the Adiyukh Tower, which several centuries ago was surrounded by an inaccessible wall of the settlement of the same name. In the article, in connection with the history of the construction of the tower, the era is analyzed, and the importance of this building in the life of the population living in the surrounding area is determined. The relevance of the study lies in the fact that the historical monuments of Karachay-Cherkessia remained unstudied until a certain time, although they certainly reflected the life and culture of the people. Reconstructing the past by excavating and studying the ruins left behind by external destruction and located in the North Caucasus has long been a priority for many local (and not only) scholars, particularly archaeologists and historians. The main result of the research was a detailed description of the structural and cultural features of the Adiyukh Tower, which is naturally one of the most important values of the history and culture of Karachay-Cherkessia.

Keywords: Adiyukh tower, Karachay-Cherkessia, legend, North Caucasus, settlement, architectural structure, fortress, loophole, window openings, parapet