bluuebunny/crossref_metadata_2025 huggingface dataset:
Worker’s material and mental life in sustainable development of industrial zones
Authors: Nguyen Ai Nhan , Tran Xuan Thi
Published: May 2021

Since the implementation of the market economy, innovation and international integration, with the correct guidelines and policies of the Communist Party and the State, Vietnam has rapidly developed industrial parks, attracting a large number of foreign and domestic enterprises came to operate in industrial zones. Having a large number of employees, enterprises operating in industrial zones must pay attention to working conditions and other issues for workers. One of the most important issues of concern is the material and mental life of workers. A sufficient material life when ones’ needs for food, accommodation, clothes, etc. are satisfied allows workers to survive and regenerate their energy for work. A healthy mental life ensures brings positive mood, motivation, attitude and effective working behaviors. Inadequate material and mental life reduces workers’ productivity and thus influences firms’ growth. Ensuring material and mental life for workers in industrial zones is a prerequisite in boosting productivity and achieving sustainable development. This study use survey and interview data to examine the quality of material and mental life of workers in industrial zones in Vietnam. Low income was the main hindrance to a sufficient material life and a rich mental life of workers. In addition, low quality of meal and working conditions had significant impacts to their health. The results were discussed in relation to previous studies on the life of workers in industrial parks.
Labor disputes and illegal strikes in sustainable development of Vietnam’s industrial parks
Authors: Vu Dung , Tran Tuan Minh
Published: May 2021

A survey of 69 foreign-invested enterprises in six industrial parks in southern Vietnam found that strikes occurred at all enterprises with the participation of the majority of employees. Strikes left negative impacts on production and business activities of enterprises as well as the sustainable development of industrial parks. The fundamental cause of illegal strikes was workers’ limited knowledge about strikes, the Labor Code, their rights and interests during strikes, low discipline, and mismatch between personal values and industrial working environment. Employees were also easily provoked when it comes to personal interests; as a result, they can cause chaos when provoked.
University as an analogue of the neural network
Authors: Suleimenov Ibragim , Bakirov Akhat , Niyazova Guliyash , Shaltykova Dina
Published: May 2021

A mathematical model is proposed, which allows to estimate the number of successful university graduates based on parameters characterizing the effectiveness of vertical (lectures, seminars) and horizontal (peer education) training. It is shown that with low effectiveness of vertical learning, an effective means of improving the quality of education in general is the targeted formation of horizontal groups within which information is exchanged. It is shown that with extremely low quality of vertical learning, the behavior of the “university” system is characterized by phase transitions: with a smooth increase in the parameter characterizing the intensity of horizontal learning, there is an abrupt increase in the number of successful graduates. It has been established that with the existence of pronounced links between individual lecture courses, the “university” system becomes an analogue of a neural network.
Technique for accounting for the decrease in labor productivity due to workspace overcrowding
Authors: Undozerov Vadim
Published: May 2021

In civil engineering, delays are ubiquitous. They cause significant economic damage. One way to prevent deadline disruption is to lower the duration of tasks by increasing the number of workers on critical path activities. However, when the number of workers increases above a certain level, the duration stops decreasing due to the interference between workers that occurs in a limited work space. This situation is called “work space overcrowding”. To determine the number of workers at which work space overcrowding occurs, as well as to improve activity scheduling accuracy, the author has developed a technique for accounting for labor productivity decline due to work space overcrowding. During the development of this technique, an analysis of existing approaches was carried out. Their shortcomings in practice are revealed. Then, the factors of productivity decline associated with overcrowding are identified. These factors are divided into two categories: “spatial” and “socio-psychological”. Two models are developed based on a mathematical formalization of these categories. The criterion for choosing between the two models is the intensity of workers' movements. The technique was successfully verified using peer review by specialists in nuclear power plant construction. It was found that the technique accurately reflects the general nature of labor productivity dependence on the number of workers: constant levels of productivity up to a certain number, followed by decreasing levels of productivity, at accelerating rates, above that number. However, application of the technique provides only a rough approximation of this dependence in quantitative terms. This is compensated for by the technique’s simplicity, requiring a limited number of inputs to produce a meaningful result. Finally, applying the technique to two specific cases, a recommended limit of the increase in the number of workers is determined for both. In the future, the technique can be applied to a wider range of construction activities.
Indefiniteness Effect on Meaning Regulation in the Young Female Students Trained in Psychology
Authors: Abakumova Irina , Ponomarev Peter , Kolesina Karina , Godunov Mikhail
Published: May 2021

Life-purpose orientations and self-reflection are important factors in person-al meaning regulation. Anyone living in the transitive society of today does not exercise full control over his or her life activity due to various factors of indefiniteness. The coronavirus (COVID-19) pandemic, starting at the beginning of 2020, swept the world and is now considered to be a global indefiniteness factor. Life indefiniteness that grew with the pandemic is a supplementary stress factor, the one that can be treated as either distress or eustress. This article is aimed at showing the results of an empirical study of differences in the life-purpose orientations and self-reflection in young unmarried females being trained in psychology in the city of Rostov-on-Don in March 2017 (n=53) and in October 2020 (n=43), that is prior to and during the pan-demic, which may be considered as different indefiniteness effects in life. D.A. Leontyev’s “life-purpose orientations” test and I.A. Stetsenko’s self-reflection questionnaire were implied in the study. Growth of all mean indicators in both tests during the pandemic against the same indicators prior to the pandemic, was revealed. Differences in all parameters are statistically veratious, which was stated by the Mann-Whitney test. The empirical study established that the pandemic may be viewed in respect of the examined acmeologically homogenous category as eustress, i.e. an overcomable indefiniteness factor. The above eustress resulted in a positive reconstruction of meaning regulation processes and in psychological adaptation, which lead to the growth of the level of life orientation meaningfulness and self-reflection among the respondents.
Psychological Microclimate of Student Groups, Studying in Different Instructional Formats
Authors: Dikaya Liudmila , Shipitko Olesya , Borokhovski Eugene
Published: May 2021

The article discusses psychological microclimate of a student group under different instructional formats (teaching and learning face-to-face, online, or blended). The main objective of the study was to explore factors that contribute the microclimate formation in connection with the changes that the formal postsecondary education undergoes because of the COVID-19 pandemic. One hundred and sixty-six students of several higher education institutions in Rostov-on-Don, Russia took part in the study. To fulfill the study objective, data about various individual characteristics of participating students and their subjective rating of the psychological microclimate in the respective student groups were collected by means of psychological testing and subjected first to the ANOVA and then to the multiple regression analyses. ANOVA revealed no statistically significant differences across instructional formats either in the microclimate scores or in the respondents’ psychological characteristics. The follow-up multiple regression analysis explored models of joint contribution of the predictor variables to the formation of the microclimate in student groups. Specifically, it found that the relationship between the microclimate and emotional tone is negative, whereas generosity and leadership inclinations are positive predictors of the psychological microclimate in student groups. Better understanding what factors determine dynamic interactions among students in various instructional formats could be instrumental in optimizing microclimate in students group, undoubtedly affected by rather dramatic changes in all aspects of our social lives, caused by the current epidemiological situation in the world. Psychological microclimate in a group is, in turn, capable of seriously impacting on students’ learning performance and psychological wellbeing.
Teachers’ Ideas about their Appearance and Features of Non-Verbal Communication with Pupils During the Distance Learning
Authors: Korochentseva Anna , Terekhin Vyacheslav
Published: May 2021

The article is devoted to the problem of teachers’ attitude to their appearance and features of non-verbal communication with pupils, during in the distance learning. A comprehensive analysis of quantitative and qualitative indicators of teachers ‘ attitude to their appearance, the degree of satisfaction with various components of their appearance, such as face, body, expressive movements, is carried out. The ideas of teachers about the correspondence of their external appearance to age and professional role are described. The satisfaction with their appearance among teachers is compared depending on age. The level of reflection of teachers in relation to their external appearance and their readiness to change it are described. In addition, the article describes the results of a questionnaire aimed at identifying difficulties in non-verbal communication and interaction, between teachers, pupils and parents that arise in the conditions of remote work.
Digital Skills of Teachers
Authors: Serezhkina Anna
Published: May 2021

The aim of the work is to analyze the digital skills of teachers of Russian universities a year after the COVID-19 pandemic. The latest research on the digitalization of education, analysis of the digital competencies of teachers and tools to evaluate the digital skills of educators has been conducted. The results of a study conducted on a sample of Russian teachers are described. It has been revealed that teachers have an average level of digital literacy, and most educators are integrators and experts in the use of technology in the educational process. They are able to assess educational resources, create digital resources and share digital materials, cope with the problem of changing existing digital courses, etc. The findings are of interest both to the university’s professional development system, which develops the digital competence of its teachers, and for teachers who wish to improve their level of digital literacy through self-education.
Digital Technologies, as a Factor in the Search for a New Quality of Inclusive Education
Authors: Yaskevich Daniil
Published: May 2021

More than a billion people in the world have disabilities, and therefore face barriers in various areas of life. Digital technologies in inclusive education can help integrate these people into the active social and economic life of society. The purpose of this study was to analyze new educational technologies from the point of view of providing a new level of inclusive education. This article analyzes and presents visual graphs on the number of people with disabilities, their involvement in the higher education system of the Russian Federation, regulatory documents relating to people with disabilities and inclusive education. Studied the problems that arise in people with disabilities. Personal and professional requirements for teachers are formulated. An analysis of the requirements for educational institutions in the context of teaching people with disabilities was carried out, digital technologies and additional tools used in inclusive education, as well as the tasks they perform, the experience of implementing inclusive education and digital technologies in this area were analyzed. This article also proposes the concept of the Center for the Education of Persons with Disabilities under the President of the Russian Federation, the purpose of which is to implement the principles of humanism and economic expediency by developing the prospects of persons with disabilities with its further application. The main tasks of the Center are: modernization of the inclusive education system, modernization of the regulatory framework with the involvement of persons with disabilities, selection and special training of domestic teachers, attraction of a foreign professor-teacher for the development of inclusive education, involvement of Russian-speaking students in the Russian education system, regardless of citizenship , temporarily or permanently living abroad, stable stereotypes in a society with limited physical abilities, as limited, but not limited in the realization of oneself as a full-fledged member of society.
Semantic Features of Students’ Attitude to Interaction in the Digital Educational Environment
Authors: Shcherbakova Tatyana , Misirov Dynamutdin , Loseva Irina , Zhitnaya Inna
Published: May 2021

The characteristics of the main content of the resources and risks of the digital educational environment are considered. The features of understanding the nature and determinants of the success of the interaction of future specialists in the digital educational environment are shown. The article deals with the use of information resources and interaction in the network as a factor of professional and personal growth of students. An idea is given about the features of the semanticization of relations in the digital educational environment. The role of an adequate understanding of the semantic core of the problem in the productivity of students ‘ project activities is shown. The conditions and ways of achieving success in interaction in the information space within the framework of educational and professional activities are described. The relationship of success with information competence and semantic features of the attitude to interaction in the information space, the motivation of achievement and the expression of the desire for self-development is shown. The results of an empirical study of the peculiarities of students ‘ attitudes to interaction in the digital environment are described, and their ideas about the limitations and risks of this format of activity are shown. The article presents the material describing the main content of students ‘ ideas about the characteristics of a successful teacher and a successful student as subjects of interaction in the digital educational environment.
The Psychological Hardiness of Students with a High Insomnia Index During the Covid-19 Pandemic
Authors: Totskiy Dmitry , Alekhin Anatoly , Leonenko Natalia , Pultcina Christina , Belyaeva Svetlana , Guzi Lubomir
Published: May 2021

The combination of total uncertainty and forced self-isolation during the pandemic create a condition for stress reactions, mental and somatic disturbance of a large number of people around the world. Sleep quality has been validated as an indicator of well-being during a pandemic and a predictor of delayed risk. At this article demonstrate the interaction between psychological hardness and risk of insomnia in group of students of Herzen University during the period of remote education connected with COVID-19 pandemic. The hypothesis of the study was the assumption about the influence of hardness on the ability of students to cope with the challenge of complexity, the negative relationship of its characteristics with the index of insomnia and anxiety, as well as positive ones with the characteristics of life-meaning orientations and tolerance to uncertainty. The study show that level of psychological hardness can predict risk of insomnia and feeling of anxiety. The article demonstrate that psychological hardiness is connected with tolerance to the uncertainty. The practical significance is determined by the substantiation of indicators of potential risk and directions of development of resources for coping with the challenge of complexity in the student period. The article shows that resilience is associated with a tolerance for uncertainty.
Disability of enterprise employees in Chelyabinsk region of Russia due to poor environmental conditions
Authors: Taradanov Alexandr , Nevolin Vladislav , Doldo Natalia
Published: May 2021

The research is based on analysis of the survey for identification of reasons for injuries and following disability of staff which was organized in November and December 2020. Experts-respondents were 415 employees of 258 enterprises and organization in Chelyabinsk region. As the main reason for disability was named mental outside of work injuries. The second reason is physical outside of work injuries. The 3rd place in the list is physical injuries at work. The fourth reason is mental injuries at work. Thus, the working activity of respondents is 2.4 times less traumatic than outside of work activity. Experts named the reduction of attentiveness as the most valuable reason of injuries and following disability (24.3%). Then follow the omission of technical control over the content of materials, equipment performance and tool quality (19.2%), the omission of control over employees’ behavior (19.1%), risky behavior of employees at work (18.6%), problems of the legislative framework for safety and health (8.7%), no-fault incidents (5.8%).
Ecological assessment of the lake ecosystem sustainability as exemplified by Lake Gorkoye (Chelyabinsk Region)
Authors: Sibirkina Alfira , Likhachev Sergey , Dvinin Dmitry , Voitovich Georgiy , Trofimova Lyubov , Markova Lada , Mulyukova Oksana
Published: May 2021

The article is devoted to the assessment of the ecological sustainability of Lake Gorkoye in the Chelyabinsk region (Russia). The condition of aquatic ecosystems in industrial regions is mainly determined by the impact on them of anthropogenic factors. The ecological assessment of Lake Gorkoye was carried out according to organoleptic and hydrochemical indicators. The conducted physical and chemical analysis of water in Lake Gorkoye allows stating that water pH characterizes water as slightly alkaline and alkaline, water saturation with dissolved oxygen is within the norm for water fishery use. The excess of the norms of ammonium cations and nitrite ions, with normal levels of phosphate and nitrate ions, suggests that water in Lake Gorkoye belongs to the dirty water class, which is confirmed by the calculated ratio of nitrite-ions and ammonium cations (1.00:9.69). The revealed COD/BOD ratio is equal to 2.09, indicating that the biological purification process cannot fully occur. Lake Gorkoye is in an unstable state directly caused by business activities in the surrounding area.
System analysis of a polluted dynamic system of natural waters taking into account risks
Authors: Vertinsky Alexey
Published: May 2021

The purpose of the study. A systematic study of the urgent problem of pollution of the natural water system and the evolution of water protection zones (boundaries), taking into account their dynamism and risks. A systematic approach is important not only because of the complex consideration of problems, but also to ensure the task of making systemic environmental decisions. Methods. The article uses the methods of systems analysis, statistical analysis, modeling, decision-making, optimization, classification (taxonomy) and risk management systems. Results. A system analysis has been carried out, on the basis of which procedures (algorithms) for modeling the system, algorithmic evaluation of the effectiveness of monitoring of water protection zones, dynamic water systems have been developed. The identification of the linear form from the nonlinear basic functions of the contribution of each pollution factor is used, taking into account the weight coefficients. An approach to the classification of water protection zones according to “tension” (taxonomic analysis) is also proposed. Conclusion. The performed system analysis takes into account the behavior of key (control) factors. This is necessary for the study of all subsystems - organizational and legal, socio-economic, environmental, technological, methodological support (education, consulting, training), etc. The results of the analysis and algorithms will make it possible to evaluate the parameters of water protection works, to solve various practical problems (for example, identification of the contribution to total pollution of each pollutant).
Research of clean drinking water provision the population of the Kemerovo region-Kuzbass
Authors: Zaytseva Anna , Brel Olga , Makarov Kirill
Published: May 2021

Many regions of Russian Federation have serious problems with water supply. Despite the significant water resource potential, including ground, surface and mineral waters, not all the population of the Kemerovo region is provided with clean drinking water. Besides the location of heavy industry enterprises, especially coal mines and pits, within the boundaries of river basins affects the condition and quality of water from different water sources. The purpose of this paper is to provide a research of clean drinking water providing the population of the Kemerovo region-Kuzbass, formulate the main problems and identify possible areas of activity in the field of increasing the availability of clean drinking water for the population of Kemerovo region-Kuzbass.
Modeling the process of force load generation at the initial periodic change in pressure (a plane problem)
Authors: Khudjaev Mukhiddin , Nematov Erkin , Karimova Anorgul , Khurramov Doston , Khasanov Botir
Published: May 2021

The article deals with modeling the process of force load generation at an initial periodic change in pressure (a plane problem). The subject of research is a pulsating flow in a flat channel at an initial periodic pressure change. The determination of flow parameters with a periodic change in the inlet pressure; the changes in the structure of the working fluid associated with the release of various particles from the pipe walls, the addition of impurities to prevent leaks, and the high-speed modes, are given in the article considering the law of molecular and molar transfer between layers. Research methods are based on Newton’s rheological law, according to which molecular transfer is described by the law of proportionality of stresses to the derivative of the normal velocity; on the method of accounting for molar transfer by proportionality of stresses to the derivative of normal acceleration; on the method of mathematical modeling and the analytical method for their solutions, based on the provisions of operational calculus. An analytical solution to the problem of pulsating fluid motion in a plane-parallel channel is obtained with allowance for single and group transfer of molecules in the flow. The application of the analytical expressions obtained for the velocities is not limited to the critical Reynolds number, i.e. they are applied for any values of this number. Analytical expressions are obtained for the transverse and longitudinal components of the flow velocity. The resulting solution describes two zones of flow: in the first zone, two types of transfer occur, depending on the flow pattern, either molecular or molar transfer of fluid volumes between the layers prevails. In the second zone, only molecular transfer occurs.
Modeling fluid outflow from a channel consisting of three different segments
Authors: Karimov Kamolkhon , Khudjaev Mukhiddin , Akhmedov Azamat
Published: May 2021

The topic of the article is modeling fluid outflow from a channel consisting of three different segments. The subject of research is the outflow of fluid from a channel consisting of three different sections. The article discusses the parameters of the fluid flow in the channel segments of the converging flow section, the section of a constant radius and expanding flow section. Research methods are based on Newton's rheological law; the continuity equation and the Navier-Stokes equation, which are the basic equations of fluid flow; and on the method of mathematical modeling and analytical method of solution. Expressions of hydrodynamic parameters for each segment, with a successively located converging section, a section of a constant radius, and expanding flow sections, are determined in the article by analytical method. Analytical expressions are obtained for the pressure and average flow rate of the fluid in the channel where there are converging rectilinear inlet flow area, cylindrical average area, and expanding rectilinear outlet flow area. The solutions obtained make it possible to determine the flow parameters in the zone of the vibration baffle of pipeline transport of such a geometry that damps vibrations caused by the flow; in the transition sections of the channels of hydraulic drives and in other channels of the fluid flow, which are set to improve the hydrodynamic parameters of the flow.
The role of diatomite as a detoxifying agent in soil contamination with copper
Authors: Kulikova Alevtina , Isaichev Vitaly , Kozlov Andrey , Tsapovskaya Olga
Published: May 2021

The article presents the results of studying the toxic levels of mobile copper in typical chernozem by doing model field experiments with artificial soil contamination with copper sulfate at a level of 2 MPC Cu, 4 MPC Cu and 10 MPC Cu. It was shown that this increased the content of mobile copper from 1.4 (2 MPC Cu) to 2.0 times (10 MPC Cu) when copper was extracted from the soil, respectively, with an acetate-ammonium buffer solution of pH 4.8 and 1n HCl solution. The latter was accompanied by the loss of almost a third of the spring wheat yield (29%) and an increase in the entry of the element into produce (grain). The application of diatomite to the soil (dose 5 t / ha) as a detoxifying agent contributed to a decrease in the level of copper in the spring wheat produce by 8 (2 MPC Cu) and 35 (10 MPC Cu)%.
Environmental assessment of soil pollution by heavy metals within the boundaries of roadside areas
Authors: Antonenko Ekaterina , Melnichuk Aleksandr , Popovich Valentina
Published: May 2021

The work is devoted to the environmental assessment of degree of soil pollution with heavy metals on land plots, located within the boundaries of roadside territories. The study area is characterized by uneven anthropogenic load on different sections of the road. The article examines the indicator of lands ecological state, taking into account heavy metals content, their toxicity, excess of background level. As a result of the research, it was revealed that the excess of the MPC was recorded for two elements of the 1st hazard class - lead and zinc. Thus, the 5-meter zone belongs to the category of very strong pollution (2 MPC for lead, 1 MPC for zinc, and the zone from 25 to 50 m is slightly contaminated). This algorithm can be used for an integral and ecological-economic assessment of soils of land plots, located within the boundaries of roadside territories.
Improvement of organization of ecological housing construction in the Moscow region
Authors: Larionov Arkady , Nekrasova Tatiana
Published: May 2021

The paper substantiates that the development of ecological construction in Russia is currently progressing at an insufficiently high rate, which is primarily due to the lack of effective systemic support from the state at the legislative and executive levels. The author emphasizes that without the formation of a proper legislative base and state programs that stimulate ecological construction, all attempts to build by introducing innovative ecological solutions will not give the expected effect. The need for state incentives for business entities in the residential real estate market, the creation of legal and economic mechanisms that will be the engine of ecological housing construction in modern Russia is argued as a development perspective for the segment of the national economy studied in the work.
Frequency of using additional coefficients during the engineering-and-technical investigation of buildings
Authors: Doroshin Ivan , Perunov Aleksandr
Published: May 2021

For definition of cost of works on the engineering technical investigation we need to apply some correcting coefficients presented in the article. These coefficients are recommended and show the difficulty of real investigation. We have found some other coefficients, that reflect the conditions of investigation more exactly, based on real works in certain investigation organization, that are not recommended in standards. For each coefficient we bring the frequency of its use, based on the data of certain organization. If the coefficient is used rather often but not always, we think it possible to obtain the right value of the coefficient. The obtained results for the coefficients are compared to the new regulatory documents. The comparison lets us say, that coefficients, brought in different documents vary. Moreover, for certain cases, met rather often in the practice of investigation, there are no coefficient in the recommended sourcebook. So we propose to create the common system of coefficients, based on statistics of several investigative organizations.
Business Center construction project as the sustainable development model
Authors: Luchkina Veronika
Published: May 2021

Sustainable development means the ability of an object to maintain the required level of environmental, social and economic indicators while meeting the needs of not only the living, but also future generations. These standards suggest using a uniform estimated figure that considers economic, environmental and social indicators. Design with resource-saving technologies has become an important part of the developed Terms of Reference for the project, and environmental friendliness has become a key element of the business center marketing strategy. The research is aimed at developing a business center construction project as a sustainable development model. The research results are the following tasks: to perform calculations on the total cost of the building’s life cycle; perform the project economic efficiency assessment; consider technical solutions for power consumption systems, building heat supply and water consumption systems; analyze the sustainability of the project environment; identify the risk levels for the business center construction project development. The research itself develops a concept for the project implementation, project risk analysis was carried out, the categories for assessing the environmental sustainability were compared with possible technical solutions of the project construction. There were also considered technical characteristics on internal and external lighting, heat supply of the building, water treatment and re-use, and energy-efficient elevators. The conducted risk assessment revealed a low cumulative risk of this construction project development. With the factored level of incomes and expenses, the project can be recognized as efficient. Further research matters can be issues of a detailed study at the level of a comprehensive ESG risk assessment of contemporary construction companies.
Organizational-and-technological solutions for waterproofing joints of highly prefabricated coating panels
Authors: Zhadanovsky Boris , Sinenko Sergey , Slavina Anastasia
Published: May 2021

This paper describes the technology and organization of the production of works on waterproofing the joints of highly prefabricated coating panels on a soft roof. The process of manufacturing waterproofing works can be divided into three stages - preparatory, main and final ones. Each stage has its own technological features and rules for performing work. The quality of execution of each stage affects the quality of work as a whole, ultimately providing the necessary reliability and strength of the coating.
Reliability of the organizational-and-technological model of clusters of sustainable urban residential development
Authors: Semenenko Mikhail , Guryanov Nikita
Published: May 2021

The aim of this study is to determine the interpretation of the term “Cluster of urban residential development” used in the organization of reoriented urban enclaves, taking into account the organizational and technological model of the reliability of formation. In the implementation of such plans, a set of joint tasks of the organizational and technological structure is determined and a number of parameters are taken into account, (comfortable living, with meaningfully used free space; a combination of residential buildings with social, educational, cultural, household and entertainment facilities, etc.), and also - the basic principles of the formation of the reliability of the organizational and technological model of the cluster of urban residential development. The underlying scientific theory is that by using the methods of organizational and technological modeling and system engineering, the indicators of the total durability of construction design can be increased. As a result of the study, the characteristic properties of a cluster of urban residential development were established to be used in an integrated model.
Improving the manufacturability of floor slabs by pre-installing elements that partially replace reinforced concrete and formwork
Authors: Akimov Seyran , Balakchina Olga , Akimova Elvira , Malahov Vladimir , Shalenny Vasilij
Published: May 2021

The article discusses well-known and perspective constructive and technological systems for the installation of monolithic and precast-monolithic floor slabs of civil and industrial buildings. It shows examples and expediency of using all kinds of inserts made of plastic and other light materials and products for replacing a part of heavy monolithic reinforced concrete. An original resource-saving method for the installation of precast-monolithic floor slabs with a simultaneous increase in the degree of their construction readiness is proposed. This effect is achieved by reducing their own weight and the use of permanent formwork. Reduction in own weight of the precast-monolithic floor slab is ensured by the use of volumetric lightweight trapezoidal or rectangular inserts, preferably made of expanded polystyrene, during its installation. The use of permanent formwork will eliminate the need for the subsequent performance of labor-intensive finishing and insulation works. To confirm the effectiveness of using the proposed method of precast-monolithic floor slab installation, the operation of two floor slabs was modeled in the LIRA SAPR computing complex - the proposed reinforced concrete innovative slab and a solid reinforced concrete slab. Having analyzed the calculated forces, deformations and the corresponding consumption of reinforcement and concrete, comparative indicators were obtained for the proposed innovative slab and for a typical solid floor slab. As a result, significant savings in material and cost have been proven.
Problems of modelling the bond reinforcement in concrete
Authors: Tamrazyan Ashot
Published: May 2021

Traditional design research typically focuses on the design and construction of new structures, buildings and structures. A large proportion of existing concrete structures have wear problems. The longitudinal shear stress created by a load in reinforced concrete at the boundaries of concrete and reinforcement is considered. The parameters of numerous variables affecting this relationship are given, including the strength and cover of concrete, the type of reinforcement, the use of transverse reinforcement, the state of the reinforcement surface, the length of the anchorage, the stress state in the reinforcement, loading, and environmental influences. An empirical model obtained by the best comparison with test results is presented. The results of the mutual influence between loading and corrosion of reinforcing steel are presented. Research results show that loss of bond caused by structural failure becomes more critical compared to other types of failure as the life of the structure increases.
Development of a parametric model for the organization of scientific and technical support during construction
Authors: Kashirtsev Mikhail , Topchy Dmitry
Published: May 2021

The aim of the study is to create a parametric model, using which it will be possible to formulate a program of measures carried out during the scientific and technical support of construction (STSC) for each specific object, as well as increase the efficiency of construction production by preventing unaccounted indicators during design. The uniqueness of this model lies in the fact that it adapts to the conditions of any object of high-rise construction. As a result, it will be possible to simulate a set of measures for the implementation of STSC for each unique object. Since the construction of a unique high-rise building requires the use of STSC, the question arises of the application of various methods and methods at each object. The unique high-rise buildings and structures considered within the framework of the STSC are unique, therefore, each needs to apply its own parameters relevant to a particular facility. For example, we can say that any parameter associated with the monitoring of the bases will be different for each object, since the ground conditions for each building under construction are different. To create a model, a number of parameters were selected that are most necessary for inclusion in the STSC regulation for the construction of unique high-rise buildings, and each parameter has its own criterion that varies depending on changes in the characteristics of the construction object. All parameters are either related to actual data on the construction object, such as: air temperature, soil conditions, material of load-bearing structures, etc., or depend on and are regulated by the regulatory documents of the Russian Federation. In this case, one can avoid the subjective opinion that occurs when using the method of expert assessments. Also, avoiding the method of expert assessments can reduce the time spent on the study itself, obtaining a result, and making a forecast.
Application of vertical gardening technology in high-rise construction
Authors: Ischenko Alexander , Shishkunova Daria
Published: May 2021

In the modern world, urban areas are gradually replacing natural areas, which, in turn, negatively affects the environmental situation of the city. To solve this problem, people began to think about greening megalopolises in such a way that it did not occupy useful areas of the urban environment. The solution to this problem is possible by using vertical gardening technology in high-rise construction, which turns gray walls into vertical gardens. This technology allows not only decorating city streets, but also to significantly increase energy efficiency, create a natural environment, and have a positive impact on the psycho-emotional state of a person. This paper discusses various vertical gardening technologies for high-rise construction.
Modeling the balance of interests of the participants of an investment and construction project in the context of the use of BIM technologies
Authors: Oparina Lyudmila , Karasev Ivan
Published: May 2021

One of the most urgent areas of development of the construction industry is the introduction of BIM technologies in investment and construction projects. Nowadays, despite the active development of software, the issues of providing a regulatory and legal framework for the implementation of BIM technologies in the organization and management of investment and construction projects, as well as regulations for the interaction of participants both at the design and construction stages, remain insufficiently resolved. The issue of assessing the effectiveness of BIM implementation also remains relevant. To solve the above issues, it is advisable to model the balance of interests between the participants, since they often pursue multidirectional goals. Based on the analysis of modern modeling methods that allow describing the multidirectional interests of participants in investment and construction projects, the authors came to the conclusion that it is advisable to use the methodological apparatus of game theory. Also, it is possible to use the Nash equilibrium method, which, when applied to the organization of investment and construction projects, can be formulated as follows: all participants achieve the observance of their interests (win) without colluding. The systematic application of BIM technologies together with the balance of interests of the participants in investment and construction projects will increase the efficiency of their organization and management.
Development of technology for the construction of heat-efficient monolithic vaults from basalt fiber concrete
Authors: Kazakov Dmitry , Tkachenko Aleksandr , Arzumanov Arben , Bolotskikh Leonid , Mishchenko Andrey
Published: May 2021

The paper considers the issue of erection of structures of buildings and structures from monolithic dispersed-reinforced concrete, capable of performing not only a load-bearing, but also a protective function. The analysis of a number of dispersed-reinforced concretes with both structural and thermal insulation properties has been carried out. An increase in thermal efficiency is expected through the use of industrial porous aggregates. The technical indicators of samples of basalt-fiber-reinforced concrete with fillers: perlite and foam glass have been experimentally investigated. Experimental relationships are obtained that characterize the compressive and bending strength, as well as the thermal conductivity of the materials under study.
Determining the optimal construction method for basements using the Analytic Hierarchy Process
Authors: Maaruf Ali , Oleynik Pavel
Published: May 2021

In the construction industry, there are two methods for constructing basements (Top-Down) and (Bottom-UP). The difference between them lies in the sequence of works, since in the (Bottom-Up) method the end of the excavation work is the necessary condition for the beginning of the substructure construction, and this is different from the (Top Down) method where excavation and construction of the substructure and the superstructure are carried out in parallel, which significantly reduces the project duration but at the same time increases the construction cost. Also there is a difference in terms of use for each of these two methods, for example, it is preferable to use the (Top-Down) in dense urban areas, where there is not enough space for the construction and where there are concerns that the adjacent buildings may be deformed as a result of construction, and this is what the (Bottom-Up) method cannot provide. In order to determine the optimal method from a mathematical point of view, 7 main criteria and 25 sub-criteria were identified, and the Analytic Hierarchy Process was used to solve this multi-criteria problem. Using the Expert Choice software, we found that the (Top-Down) method is preferred by 14.8% more than (Bottom-Up), and a sensitivity analysis was performed to determine which criteria dominated our optimal result.
Heat transfer intensification during condensation of refrigerant with straight pipelines for a heat pump heating system
Authors: Fedosov Sergey , Fedoseev Vadim , Loginova Svetlana
Published: May 2021

The subject of this study is to improve the design of the condenser for an air heat pump system in order to increase the heat exchange of the walls of the collectors (torus) and condenser pipelines with water for the heating circuit and to reduce the energy consumption for its operation. The emergence of the need to improve the existing models is due to the fact that the use in some cases of devices based on Venturi tubes and vortex tubes with reagent supply coaxially or tangentially does not give the desired positive effect. When their geometric parameters change, a decrease in the hydraulic resistance of the fluid and the volume of the working fluid leads to new configurations of the device. In our proposed device, the effect is achieved by reducing the total hydraulic resistance, increasing the efficiency of the heat pump system in a wide temperature range using condensers containing collectors (tori) and a container around the straight-pipe apparatus, where the straight-pipe apparatus together with the container represents a single structure of the “pipe in pipe”.
System of indicators for planning and evaluating production capacity of a construction and installation organization
Authors: Abramov Ivan , Martyanova Anastasia
Published: May 2021

To assess the production capacity of a construction and installation organization, the actual volume of work performed for a certain period and planned indicators for the use of certain resources are used. Since the state of production facilities depends not only on the production program, but also on the current state of labor resources, the actual task is to choose the most effective criteria for planning and evaluating the production capacity of a construction and installation organization. In formulating the criteria, the author was guided by the theory, allowing to establish the relationship between the production capacity of building-assembling organizations and production program and capabilities assessment and planning of production capacity for the coefficients of their extensive and intensive use. The study made it possible to form a system of indicators for planning and evaluating the production capacity of a construction and installation organization. The purpose of forming a system of indicators for planning and evaluating production capacities is to take into account in the calculations not only the actual and planned volumes of construction and installation works, but also indicators that reflect the current state of labor resources. The study revealed that through the formation of a system of evaluation indicators, taking into account the impact on production capacity of quantitative and qualitative factors expressed in the structure of labor resources, their qualifications on the one hand, as well as the rhythm and load of the construction and installation organization on the other hand.