bluuebunny/crossref_metadata_2025_split huggingface dataset:
Influence of samarium and europium on Al+1.9%Mn alloy phase composition and microstructure
Authors: Umarova T M , Normahmedov O 
Published: August 2020

Abstract
The experimental results were proposed on the base of the research of the X-ray phase and microstructural analysis of eutectic structured aluminum-manganese alloy, modified by samarium and europium (up to 0.10 wt. %). The optimal concentration of europium was determined by the metallographic microscopy in order to obtain a fine dispersed structure. The results of microstructural analysis indicate the effectiveness of modifying the aluminum-manganese alloy of the eutectic composition with samarium and europium, especially Eu, in the existence of which the primary precipitates become compact, leading to a spherical shape, which allows us to consider the synthesized Al-1.9% Mn-0.05% Eu alloy in the future as a more promising (compared with the Al + 1.9% Mn alloy doped by samarium) structural material with improved physicochemical properties.
Electromechanical installation based on a powerful current pulse generator for materials treatment
Authors: Kuznetsov V A , Kuznetsova E S , Gromov V E , Peregudov O A , Rubannikova Yu A 
Published: August 2020

Abstract
The electromechanical device containing an electromagnetic solenoid with a piston operating in the reciprocating motion mode was developed. Technologies with similar operating modes are widely used in various industries. Economical generator of powerful unipolar current pulses with unique systems is used in the electromechanical device. It allows its main parameters to be regulated in a wide range and with high speed: pulse reproduction frequency and amplitude. The principle of generator operation is based on the periodic discharge of pre-charged capacitors to a low-resistance active-inductive load. The parameters of the mechanical and electrical parts of the electromechanical device are calculated: the initial coordinate of the piston, the magnetomotive force resulting from a change in the inductance L(x), the spring elasticity, the resistance force of the piston proportional to its speed, amplitude, duration and frequency of current pulses. A simulation model of the device in the environment of Matlab-Simulink was developed. Plots of transients during the device idling and under load were constructed. The analysis of the device operating modes was performed. The developed electromechanical installation allows the process parameters to be adjusted.
Testing experimental parts of metallurgical units for wear and impact in industrial conditions
Authors: Issagulov A Z , Kvon Sv S , Kulikov V Yu , Aubakirov D R , Chsherbakova Ye P , Dostayeva A M 
Published: August 2020

Abstract
The paper presents the results of industrial testing parts made of experimental wear-resistant alloys. Cast iron was smelted with a high content of nickel and vanadium and steel with alloying elements, which vary widely over from 15% to thousandths. The prototypes wear resistance was increased by about 30-34%. The work was performed at Karaganda State Technical University. These studies were carried out as a part of the grant of the Science Committee of the Ministry of Education and Science of the Republic of Kazakhstan BR05236295 “Designing, Developing and Implementing Technologies of Producing and Machining New Generation Wear-Resistant Materials for Obtaining Parts of Metallurgical Units”.
High-temperature gas corrosion of cast-iron sections of the EcoSøderberg cell collecting bell
Authors: Temlyantsev M V , Pinaev E A , Deev V B , Temlyantseva E N , Kuvshinnikova N I 
Published: August 2020

Abstract
Investigations of the structure, chemical, mineralogical and phase composition of corrosion products of cast-iron sections of the EcoSøderberg cell collecting bell were carried out. Structural features of the scale were established using electron microscopy. The mechanism of corrosion products formation in the form of loose scale was proposed and scientifically substantiated.
Numerical modeling and optimization of geometric parameters of a composite bracket
Authors: Akhmadullina Guzel , Shmelev Gennady , Antonov Anatoliy , Gimazetdinov Aivaz , Fahrutdinov Rinat 
Published: August 2020

Abstract
The article presents the development and research results of the stress-strain state of a new composite bracket structural solution. The basic scheme of the invention and its application in hinged facade systems are described. The main feature of the developed design solution is the production of various shapes profiles made of aluminum alloys: a U-shaped profile with a wall thickness that varies along the length and an L-shaped uneven profile. Both parts of the bracket are made of aluminum alloys using extrusion method, which allows producing a profile of different shape on terms of area. The results of numerical modeling and selection of optimal geometric and physical-mechanical characteristics of the developed composite bracket in the software package are presented. The actual loads, impacts and operating conditions are taken into account. Based on the results of numerical studies, it is found out that the developed type of the bearing bracket meets the requirements of strength, rigidity and stability. The additional optimization allows reducing the weight of the bracket compared to the original model without significantly reducing the bearing capacity.
Experimental research of masonry arches under the influence of the movement of supports
Authors: Pavlov Valerii , Khorkov Evgeny , Mirsayapov Ilshat 
Published: August 2020

Abstract
The authors of the article investigate new design solutions for the restoration of damaged masonry vaults and arches. The article presents the results of experimental studies of the deformability of reinforced and unreinforced masonry arches on lime-sand solutions during normal operation with a fracture factor (horizontal and vertical movement of the support). During the study numerical and physical experiments were carried out. The article also presents the results of observations of the basement floor of the building of the Kazan Hotel on Bauman Street, Kazan, Russia. The study allowed authors to determine the deformation and crack formation of masonry arches. The experiment included a test of an unreinforced arch, until damage was obtained when a support movement occurred. At the second stage of the experiment, the damaged arch was strengthened by the developed method, and its further testing was carried out. The study allowed authors to determine the vertical displacement of the arch before and after amplification. According to the test results, one can make an assumption about the change in the deformability and destruction of the reinforced masonry arch. The reason for this may be a halt in the development of cracks that have appeared and a change in vertical displacements.
Numerical study on masonry vaults reinforced by composite
Authors: Fabrichnaya Ksenia 
Published: August 2020

Abstract
The article describes numerical study of masonry vaults, based on steel beams, reinforced with carbon fiber composites. Two amplification systems were investigated: a solid mortar with an embedded grid and a discrete one in the form of tapes (stripes). Numerical simulation based on nonlinear analysis revealed the amplification efficiency under different arrangements, cracking and destructive load, the stress-strain state of the vaults. Many models are considered: not strengthening; not strengthening with damage; reinforced without damage, reinforced with damage. The simulation results in ANSYS PC were compared with each other to assess changes in the bearing capacity and the nature of the destruction of the samples. The span of steel beams is 5 meters, the span of the arch is 1.1 meters, the rise of the arch is 120 mm, the thickness is 120 mm. The load on the vaults is applied evenly distributed. The material of the vaults is ceramic solid brick on a lime-cement mortar. The experimental results on unreinforced structures are compared with those obtained on the strengthened ones in terms of failure mode, maximum load, stiffness and ductility.
Studying fatigue life of macadam and mastic asphalt concrete with various binders
Authors: Kuznetsov Dmitry , Burmistrova Olgs , Burgonutdinov Albert , Vysotskaya Marina 
Published: August 2020

Abstract
The article shows the results of fatigue life tests of macadam and mastic asphalt concrete made with use of a bituminous binder of various PG marks. The optimal compositions of the samples of macadam and mastic asphalt concrete characterized by close residual porosity to exclude its effect on the physical and mechanical properties and indicators of fatigue life are selected. A Cooper CRT-SA4PT-BB-16 testing machine was used to evaluate the fatigue life of macadam and mastic asphalt concrete, testing beam specimens for four-point bending. The following test protocol was used in the work: a loading frequency of 10 Hz, a test temperature of + 20 ° C, a decrease in the rigidity of the samples to 50% of the initial value and the number of cycles was recorded. Based on the analysis of the obtained dependences: strength indicators, mixture stiffness and fatigue life, it is shown that there is no linear relationship between the mark of bitumen binder and the fatigue life of a road composite made on its basis, therefore, focus on PG mark of bitumen to design the composites of durable asphalt concrete with predetermined properties is not enough.
Multivariate model of construction project operational efficiency
Authors: Shagiakhmetova Elvira , Borovskikh Olga , Nizamova Adilya , Kazymova Tatiana 
Published: August 2020

Abstract
Economic efficiency during the entire life cycle of a property is crucial when making a decision on an investment. The resulting performance indicators are influenced by various underlying factors. The purpose of the study is to determine the degree of the factors influence on the final result. The study considers an apartment building and 50 variants of the project implementation according to the chosen factors, which are construction period, selling price per square meter, discount rate, land plot cost and construction cost of one square meter. The net present value of the project (NPV) and internal rate of return (IRR) were selected as the resulting indicator. When performing the calculations, following method were used: project net present value calculation method (NPV); method for calculating the discounted payback period (PP); method for calculating the internal rate of return (IRR), sensitivity analysis, multiple correlation and regression analysis (multiple regression). We found that the selling price and construction cost of one square meter of the property affect the most on the net present value of the project (NPV). The obtained model can be used by investors to simulate various options for the effective projects implementation in changing environment.
Development of innovative phosphogypsum processing technologies as a factor of import substitution in the rare-earth metal market
Authors: Kukin Leonid , Okolelova Ella , Kukina Olga , Zolotukhin Sergey , Eremin Andrey , Volokitin Vladimir 
Published: August 2020

Abstract
An innovative method for the differentiated processing of the phosphogypsum chemical production is proposed. It consists in the simultaneous paving materials production in the form of paving slabs and a concentrate of non-radioactive rare earth metals. Russia currently does not perform large-scale mining of rare-earth metals; its share in the world market is a little over 1%. Today, China is the undisputed world leader in rare earth metals trading. Therefore, production of these necessary for high-tech industries elements of phosphogypsum waste allows the most important current tasks solution, the problem of import phaseout. The experimental studies have shown that the profitability index of the proposed innovative technology production will be more than 50%, which suggests its high economic efficiency. All manufacturers using new technologies and materials in their activities are concerned about the risks. In the studied case, the technology is so low-cost and highly profitable that the impact of risks is almost completely leveled. The technology developed by the authors is based on the formation of the regulation and self-organization principles in the phosphoric acid and mineral fertilizers production. This scientific research contributes to the efficiency improvement of the corporate mechanism used in the innovative technology for phosphogypsum waste processing.
About explosive technology of building road embankments, tunnels, canals
Authors: Tuktamyshov Nail 
Published: August 2020

AbstractPerforming different works (construction of road embankments, canals, tunnels, moving some soil mass in a given direction), as well as construction of various towers, power transmission supports, foundations for bridge supports, special pits for anchors is carried out by explosive technologies. When carrying out excavation works related to the construction of road embankments, trenches, wells, cord charges are used. From the mathematical point of view, the calculation of such charges presents the problem of determining the movement of soil particles in the plane perpendicular to the axis of the corded charge. Calculation of geometrical characteristics of the above construction works is based on impulse-hydrodynamic setting, having “liquid” and “solid-liquid” varieties. The work gives two examples of calculations within both productions. In the first problem, within the framework of the solid-liquid model, the entire boundary of the channel is determined in the case of an explosion of a square charge, while in the second problem the explosion of two charges, when there is a circular cylinder in the ground, is investigated.
Determination of the real energy efficiency of the inlet ventilation air heater and air curtain
Authors: Mozgova Anna , Shennikova Tatyana 
Published: August 2020

Abstract
The energy efficiency of the heater depends on the U-value at certain energy costs. The article considers the calculation method for the heater performance efficiency in the inlet ventilation and air curtain of the garages for 100 and 75 motor vehicles of the largest industrial enterprise rendering transport services in transportation of loose cargoes, including ores and metal-containing products, large-sized and heavy cargoes, hazardous cargoes etc. The ventilation systems of the surveyed garages are combined with air heating. In order to determine the efficiency of the air handling units, the heat carrier flow through the heater, heat carrier temperature and the air temperature at the inlet and outlet of the air heater, the flow of heated air and the phase currents through the fan motor have been measured. Basing on the instrumental measurements carried out, the calculation results for the air heater thermal performance and the air consumption have been presented, and the determination method for the real U-value and the thermal efficiency of the examined heaters has been provided. Recommendations have also been made to improve their performance. This method is an important hands-on recommendation for the engineers serving air handling units and for the departments developing energy-saving activities for industrial enterprises.
The environmental component of construction projects in the aspect of sustainable development
Authors: Dzhidzhelava Diana , Fedina Anastasiya 
Published: August 2020

Abstract
The authors of the article pay special attention to the environmental component in substantiating the significance of construction projects and focuses on the synthesis of such aspects as: social, economic and environmental in formulating the concept of «sustainable development». A comprehensive assessment of these aspects and their quantitative expression can serve as a basis for establishing causal relationships that determine the ecological situation in a particular territory, and can also be used to develop measures for environmental protection, and as a result, for the harmonious implementation of the construction project in the formation of a comfortable urban environment. The article summarizes the results of the analysis of causal relationships, revealing the direction of eliminating the negative impact of factors on the environment and developing environmental measures for inclusion in the design documentation of the construction project. In the south of the Tyumen region, the determining direction for improving project documentation should be the VIII section of the Technical Project, which, in turn, requires the implementation of strict control over the implementation of declared environmental measures in terms of reducing emissions of pollutants into the atmosphere.
Sustainable cities: major challenges and trends
Authors: Afanasyeva Albina , Safma Roza , Kursina Irina 
Published: August 2020

Abstract
The world community begins realizing that human activity in urban systems has led to a socio-ecological crisis over the course of the development of civilization. The way out of this crisis is possible only through the formation of a new approach to the development of a sustainable habitat for existing population groups, excluding the possibility of large-scale destruction of the natural environment as a result of meeting human needs. In this regard, the term “sustainable city (eco-city)” appears in scientific circulation, which currently does not have a clear agreed definition. Generally, development experts agree that a sustainable city must meet the needs of the population without sacrificing the ability of future generations to meet their own needs. The ambiguity in this idea leads to large variations in how cities perform in their attempts to become sustainable. In these conditions, the task of creating an effective mechanism for managing urban sustainability becomes complex, including work on creating a concept, strategy and program for sustainable development of all subsystems of the city. Thus, the idea of sustainable eco-city development can and should become our national idea and play an important role in determining state priorities and prospects for further economic growth.
Availability of innovative housing from the perspective of sustainable construction
Authors: Afanasyeva Albina , Fedorova Svetlana , Yulbarisova Guzalia 
Published: August 2020

Abstract
One of the most pressing socio-economic tasks of modern Russia, on which the prospects for its modernization depend, is the development of sustainable construction as a factor in improving the quality of life of the population. The achievement of this goal is largely mediated by the solution of the housing issue, its comfort, environmental friendliness and innovation. In this regard, the current and future dynamic development of housing construction requires the use of only advanced energy-efficient and innovative technologies and building materials.
Socio-economic accessibility is a fundamental factor in the development of ecological construction using innovative technologies. However, the use of expensive technologies, on the one hand, is primarily associated with a long payback period, which means complete rejection of mass construction, and on the other hand, the increase in the cost of housing, which means an increase in the availability coefficient. Indeed, today more Russian citizens have an increasing problem of purchasing housing, while the availability of innovative housing remains a priority only for a select category of citizens. This article analyzes the problems of socio-economic accessibility of innovative housing from the perspective of sustainable construction through the prism of implementation of legislative norms and strategies.
Sustainable Development of Civil and Residential Real Estate Based on the Construction Waste Recycling
Authors: Avilova Irina P. , Krygina Alevtina M. , Krygina Natalya M. , Koshlich Yuri A. , Oberemok Marina I. 
Published: August 2020

Abstract
The work is devoted to assessing the environmental and economic efficiency of construction waste recycling concerning the sustainable development of civil real estate. The crisis processes in the micro-and macro-level economy has a negative impact on the Russian investment and construction complex, which threatens the national task performance to provide affordable housing within implementation of the investment programs financed by municipal and federal budgets. It is shown that one of the directions of sustainable reproduction of real estate objects in modern socio-economic conditions is the optimal design and selection of materials using innovative recycling technologies. Low rates of retiring areas replacement and a steady trend of growth in the volume of construction industry waste is observed. This approach is focused on solving two global problems: the economic benefits of using resources and the elimination of environmental pollution. Proposed algorithms evaluate the potential effectiveness of the property manager’s activities and the practical implementation of the techniques in management software.
Stylistic devices and expressive means in ted talks lectures on architecture and construction
Authors: Konovalova Elena , Nizamieva Maria 
Published: August 2020

Abstract
We analyze the specific genre of public lectures in English – the TED Talks. Being very popular nowadays these science lectures contain a lot of professionally oriented lexis and are a useful tool to enrich the vocabulary bank and improve listening skills. The characteristic traits of these lectures are briefness, appropriateness, convincingness, clear and rigid structure, careful preparatory work, high extent of the orientation to the audience. The language of TED talks lectures on architecture is characterized by the abundance of professional terms, collocations, expressive means and stylistic devices, such as simile, metaphor, personification, hyperbola etc. Interrogative and imperative forms and personal pronouns are widely used. They help speakers establish the contact with the audience, create the expressive and emotional speech, emphasize the main idea or make listeners think about the important points of the information. The idioms, coarse lexis and lexical repetitions create vivid and meaningful performance. Also we noted the upbeat mood and high emotionality of this genre of public speech.
Specific features of high-speed railway construction projects
Authors: Grakhov Valery , Mohnachev Sergey , Simakova Ulyana , Kislyakova Yuliya , Saidova Zarina , Armyanin Aleksej 
Published: August 2020

Abstract
The most important condition for the integration of the Russian transport infrastructure into the global logistics chain is the design and construction of high-speed railways. In the course of this research, the problems of implementation of high-speed highway “Moscow-Kazan” project by “High-speed Rail Lines” Joint stock Company were considered, and the necessity of large scale projects realization on high-speed railways construction was defined.
Then, the aggregate demand values were determined, and the distribution of traffic between different transportation modes was predicted. Finally, the induced demand value was forecasted. Based on the predicted passenger flow characteristics, the indicators of train traffic were calculated.
The passenger traffic on the road segment between Moscow and Kazan was studied. The methodology for passenger traffic calculation included the calculation of the induced demand, the possibility of passengers choosing the railway over other modes of transportation, and the evaluation of the demand fluctuations dynamics.
The scientific novelty of this study is the application of an improved method of statistical analysis in the calculation of passenger traffic. Along with the theoretical results, the carried out research has an utmost practical importance-its results can be applied in the design of main railways.