bluuebunny/crossref_metadata_2025 huggingface dataset:
Producing compressive stresses in the surface layer of spheroidal graphite cast iron by laser hardening
Authors: Maloveczky Anna , Filep Ádám , Buza Gábor , Vida Ádám
Published: August 2020

The purpose of the examined laser beam induced surface modification technology was to produce compressive stresses in the surface layer of the workpiece. The presence of residual compressive stresses increases the fatigue limit. The compressive stresses generated by investigated laser surface treatment were compared to shot peening technology results, and has been found to be equivalent.
Application of Rietveld refinement in orientated material structures
Authors: Nagy E , Kristály F , Mertinger V
Published: August 2020

The phase analysis based on the X-ray diffraction method is a well-known procedure for determining the phases crystalline in the sample. The phase identification is simple in case of the isotropic powder samples, however the standard investigation protocol cannot always be used, e.g. in case if the presence of anisotropy like preferred orientation (PO) is observed. In case of steels, the diffracted intensity of a given phases is influenced by the directional phase development having a needle character caused by the martensitic transformation; some reflections can even disappear from the diffractograms as a consequence of the strong PO. One impacting consequence of PO is over quantitative evaluation, percentages close to actual values are obtained only if diffracted intensity is integrated for the whole measured 2θ range for each phase and anomalous intensities caused by PO are corrected.

Incorrect quantitative values were obtained by using the full-profile analysis method in the course of our earlier investigations, because no correction method had been available for the recognition and evaluation of the orientated structures in phase-identification of metals. By using the Rietveld refinement method for whole measured 2θ range, both the PO and the size-strain broadening effects are accounted for. Strain results from stress developing in the lattice and can be taken into consideration in the calculated model and results are corrected to accurately describe the real structure. In the course of our research work, orientated, complex structures developing in the Cu-base alloys were investigated by using the Rietveld refinement method. The quantity of phases was determined in the different samples in which clear signs of the used technological processes could be observed in the structures. The character of orientation appearing in the structure was observed, evaluated and the necessary corrections were performed.
The effect of different grain sizes and heat input on the gas pressure inside artificial resin-bonded sand cores
Authors: Mádi L , Budavári I , Varga L
Published: August 2020

Sand cores are used to form the cavities of the castings. The quality of castings is directly affected by the quantity of the gases released from the cores. During our research, the effect of different grain sizes and heat input on the pressure of the gases evolved from the cores was investigated. The granulometric properties of the sand used for making the cores have a significant impact on the pressure of the gases. Because of the uneven particle size distribution of multi fraction sands, the gas flow conditions in the cores can be different. The gas pressure in the cores made from sieved sands can be changed between 6 and 9 mbar. According to the recorded cooling curve of the melt, it can be established, that in the case of the presented pouring conditions, a solid metal layer with adequate strength could not be developed before the gas could pass through the core/casting interface. This phenomenon may result in gas blowhole defects on the casting surface.
Lightweight Manufacturing of Automotive Parts
Authors: Wadas T , Tisza M
Published: August 2020

In this paper, some material developments and its demands in sheet metal forming for automotive industry will be overviewed. It is not easy to match and meet good performance, low consumption, low emission and high safety with comfort simultaneously, only by applying conventional materials and processes. Due to these factors and needs, continuous material and technological developments in sheet metal forming are required.
Effect of the homogenization and cold deformation on the mechanical performance of Al8006 aluminium alloy
Authors: Pázmán J , Fehér K , Gonda V , Verö B
Published: August 2020

In our study, the base material was the aluminium alloy of Al8006. Its application area covers amongst others the material for multilayer tubes. This alloy has been subjected to different technological paths consisting heat treatments (homogenization) and mechanical strengthening technologies: multiple forging, equal channel angular pressing. The aim of the technological paths was to refine the primary phase structure, and to look for the technology sequence that assures the highest strength and the highest toughness at the same time. To determine this, a complex performance index has been created that integrates these property characteristics.
Mechanical properties of AlSi10MnMg matrix syntactic foams filled with lightweight expanded clay particles
Authors: Szlancsik A , Kincses D , Orbulov I N
Published: August 2020

Compression tests measured the mechanical properties of AlSi10MnMg matrix syntactic foams filled with lightweight expanded clay particles (LECAPs). The metal matrix syntactic foams were produced by low-pressure liquid state infiltration method. Two types of LECAPs were used during production. One with ∼3 mm diameter and the other type with ∼9 mm diameter. The samples were machined and heat treated. The T6 heat treatment caused a significant increase in the properties in terms of plateau strength and absorbed energy. Also, the heat treatment caused a different failure mode in the case of the LECAP-9, which is why the absorbed energy increased by ∼50% compared to the as-cast sample.
Influence of pack cementation time on the microstructure of Cu nanofoams processed by dealloying
Authors: Péter Jenei , Han Gigap , Tran Hung Pham , Choe Heeman , Gubicza Jenő
Published: August 2020

Copper nanofoams were processed by dealloying for a prospective application as a Li-ion battery anode. The precursor material was produced by pack cementation. The effect of length of pack-cementation time on the pore structure and the microstructure of the struts was investigated in this study. It was found that for high pack-cementation times a hierarchical pore structure with nano- and micro-sized pores was formed. In addition, the longer the pack-cementation time, the lower the crystallite size and the dislocation density in the struts. A very high twin fault probability was also detected, irrespective of pack-cementation time.
Flame retardancy of recycled PET foam
Authors: Szabó V A , Dogossy G
Published: August 2020

Although significant marketing efforts have been made in recent years to reduce polymer use, the number of plastic bottles being discarded is increasing worldwide. The global environmental-socio-economic problem posed by polyethylene terephthalate (PET) bottles can only be solved by expanding large-scale recycling opportunities, while reducing the use of pure raw materials. In this article on the large quantities product of PET was upcycled with chemical foaming. During the experiments 2 m% chain extender and 4 m% chemical blowing agent and different amount of brominated flame retardant was used. The invested materials were examined with standard mechanical tests, scanning electron microscopy and UL-94 standard flammability test. After the investigation it was found that the crystallized blue PET bottle re-granulate can be used forming a flame retardant closed cell foam structure.
Investigation of the interfacial adhesion of glass bead-filled multicomponent injection moulded composites
Authors: Suplicz A , Boros R , Semperger O V
Published: August 2020

Polymeric materials are often combined with fillers and reinforcements, which modify their properties. The goal can be for example the improvement of thermal and mechanical properties or a reduction in costs. On the other hand, these materials can have negative effects too. In multicomponent injection moulding or in the case of products with weld lines, bonding problems can occur. In this research project, we analysed the effect of glass fibre and glass beads, and the most important technological parameters, melt temperature and holding pressure on the bonding strength between multicomponent injection moulded parts. The test samples were produced with a special injection mould, and the tear-off tests were performed on a tensile testing machine with a grip we developed.
Fatigue tests of zinc aluminium matrix syntactic foams filled with expanded perlite
Authors: Kemény A , Katona B , Movahedi N , Fiedler T
Published: August 2020

Metal matrix syntactic foams (MMSFs) are cellular materials which have high specific energy-absorbing properties accompanied by lower density compared to the bulk material. A special type of closed-cell metal matrix foams (MMFs) is the metal matrix syntactic foam. In this research, fatigue tests were carried out of ZA27 zinc aluminium matrix syntactic foams filled with expanded perlite. The stress levels were defined from the plateau stress of the quasi-static upsetting tests (90; 70; 50 and 30%) with R=0.1 stress ratio and f=10 Hz frequency. The results were evaluated statistically.
Investigation of VVER-1200 reactor pressure vessel’s material
Authors: Kovács Dorina , Kemény Dávid
Published: August 2020

At high temperature and pressure, the reactor materials are exposed to various radiation. Irradiation causes significant changes in the crystal structure and their mechanical properties. The mechanical properties of low alloy steels generally do not change so much with temperature. The aim of this research is to prepare the basic measurements to investigate 15Cr2NiMoVA steel, according to MSZ EN ISO 148-1:2017. Charpy impact test was made at different temperatures from -75 °C to 200 °C. Potentiodynamic tests were used to determine the corrosion rate. During the optical microscopy measurement, MnS inclusions were found in the examined material.
Neutron Irradiation of Zirconium Alloys in the Budapest Research Reactor
Authors: Szenthe I , Gillemot F , Horvath M , Hózer Z
Published: August 2020

Sustainable and increasingly safe operation is one of the constant goals of various technical and economic developments related to nuclear reactors. Reliability of the fuel elements cladding is basic for the safe and economic operation, to select the best fuel clad large number of simulations must be carried out in different operational conditions and supported by experimental results. Two types of cladding tube material had been irradiated in the a BAGIRA irradiation loop at to obtain aged clad properties. The special design of the irradiation target holder allowed the specimens to be irradiated with different fluences and at a prescribed temperature. The irradiated specimens will be tested and the measured properties will be used to simulate the aged fuel clad behaviour. This paper introduces the design, preparation and implementation of the irradiation of fuel clad materials.
The influence of the base material - filler metal pairing on the fatigue crack propagation of 700 MPa strength category welded joints
Authors: Lukács J , Mobark HFH
Published: August 2020

In the field of welding of high-strength structural steels, the 700 MPa strength category represents a kind of boundary. Overmatched (OM) consumables are also available, but the behavior of various mismatch types under cyclic loading condition is not yet clear. In order to know the fatigue crack propagation resistance of 700 MPa strength category steels and their gas metal arc welded joints fatigue crack growth tests were performed on statistically representative samples. Matching/overmatching (M/OM) mismatch type was tested, the tests results were analyzed and fatigue crack propagation limit curves were determined. The different mismatch types, our and previous results were compared. It can be concluded that M type is the optimal and M/OM type is more beneficial than simple OM type.
Examination of correlation between the granulometric properties of molding and core sand mixtures and their production parameters
Authors: Hudák Henrietta , Varga Dr. László
Published: August 2020

Foundry technology uses a lot of several natural materials. The chemically bonded sand mixtures main component is the foundry sand approx. 90-98%. Sand properties depend on it has chemical and mineralogical composition; mainly particle-size distribution and shape of grains and its size and sand surface texture. A comparative measurement of 3 foundry sand with different surface quality was carried out. Chemically bonded sand mixtures were prepared to measure their gas permeability and 3-point bending strength. A new qualifier number, CQi was used to compare our investigations.
On the analysis of the stress state of a pipeline’s bend by its height position
Authors: Abdrazakov F K , Mirkina E N , Mikheeva O V , Orlova S S , Pankova T A
Published: August 2020

When underground laying, the pipeline bends in accordance with the terrain under the influence of its own weight and an overlying layer of soil. The article provides calculations of the radius of curvature of the pipe and its comparison with the allowable one. Thus, it can be seen from the above calculations that the obtained radii are less than the minimum permissible radius of curvature. Calculations showed that the radii in the horizontal and vertical planes are acceptable.
Materials used in the construction of roads
Authors: Aleroeva L S , Magomadov I Z , Mamasurov S Kh , Mamatsuev R A , Aptaev Kh Kh , Aisungurov N D , Istamulov A M , Bekishev A L
Published: August 2020

There is a huge variety of materials and technologies used in the implementation of construction and restoration work. They are also used in the construction of roads. It is impossible to consider all their varieties and give them a description. Therefore, we consider only the most effective in our opinion. This article describes and reviews some types of modern building materials and technologies used in the restoration of roads. Some varieties of these materials are listed. Their brief description is given. Their advantages and disadvantages are considered. The introduction contains the significance of materials in construction work. The optimal and most economical materials to use are listed in the summaries and conclusion. Certain types of materials and technologies are described in the article.
Adsorption of aromatic nitro and amino compounds with modified bentonite
Authors: Atamanova O V , Tikhomirova E I , Podoxenov A A , Vedeneeva N V , Grishin M A
Published: August 2020

Wastewater of many types of industries contribute to the entry into open water bodies of toxic organic compounds, the concentrations of which in some cases exceed the Maximum Permissible Concentration for Water in Commercial Fishery Reservoirs. Typical representatives of toxic organic pollutants in the aquatic environment are aromatic nitro and amino compounds. Currently, a significant number of wastewater treatment methods have been developed. One of the most promising methods of water treatment are adsorption methods. Of considerable interest is the use of natural clay minerals as sorption materials for wastewater treatment. The object of the study is model solutions of nitro and amino compounds, the adsorption of which was studied on different versions of modified bentonites. In this work, the adsorption capacity of modified bentonite with five different acid activation variants upon extraction ofn-dinitrobenzene ando-phenylenediamine from solutions was studied. The adsorption parameters of the studied variants of bentonite, such as the adsorption value G, mg/g; interfacial distribution coefficient Kd, mg/dm3; degree of adsorption recovery S, %. The constructed adsorption isotherms made it possible to identify the most effective variants of modified bentonite with additional activation by acid to extract aromatic nitro and amino compounds from solutions. The best adsorption ability upon extraction of p-dinitrobenzene from a solution was shown by glycerin-modified bentonite, subjected to heat treatment at 550 °C, the average fraction of granules, after activation with 9 % HCl solution and 30 % CaCl2solution. The best adsorption ability upon extraction of o-phenylenediamine from a solution was shown by glycerin-modified bentonite, subjected to heat treatment at 550 °C, the average fraction of granules, after activation with 18 % HCl solution and 38 % CaCl2solution.
Quaternary reciprocal system Li, K, Pb // Cl, WO4
Authors: Kochkarov Zh A , Baysangurova A A , Khasbulatova Z S , Khubaeva M V , Abubakarova Z Sh , Maglaev D Z
Published: August 2020

There is a topology of the four-component reciprocal system Li, K, Pb ǁ Cl, WO4, its phase diagram was triangulated and stable tetrahedra revealed, the dominant chemical reactions of mutual exchange and complexation were determined. There are chemical synthesis of lead tungstate and lead oxide tungsten bronzes in ionic melts of the Li, K, Pb ǁ Cl, WO4 system carried out. A synthesis technology for lead tungstate in ionic melts is proposed based on the results.
Preparation and stereochemistry of nickel phosphine complexes
Authors: Bisergaeva R A , Hasbulatova Z S , Sirieva Y N
Published: August 2020

The Nickel (II) ion forms many stable complexes as predicted by the Irving Williams series. This experiment is about preparation and stereochemistry of nickel phosphine complexes. The nickel phosphine complexes, which were prepared are NiBr2(PPh3)2 and NiBr2(PCy3)2. The first part of the experiment is to prepare the nickel complexes. After preparing nickel phosphine complexes NiBr2 (PPh3)2 and NiBr2 (PCy3)2, the complexes have been analyzed for structural determination. The complexes were analyzed by the Magnetic Moments of solids-The Johnson Matthey Balance, UV-visible (electronic spectra), Infrared spectra (normal range) and Far-infrared spectra (which were supplied in the practical booklet).
Starogroznensky oil and gas field: historical background and current status
Authors: Daykaev A A , Aydamirova Z G , Abubakarova E A , Shaipov A A , Movlaeva A M , Bachaeva T Kh , Zakriev Kh I , Dzharnagaliev R Z
Published: August 2020

The paper is devoted to one of the largest deposits of the North Caucasus, i.e. Starogroznenskoye field. There are identified the main development stages of this field, i.e. well production, development of the Miocene and Mesozoic deposits, and the current stage. Well production continued almost until the end of the 19th century. At the Miocene stage, the production was carried out from thrust and subthrust sand formations of Karagan and Chokrak. The paper also mentions the experimental adit on Mamakayevskaya gill. Which was headed by mining engineers A.A. Klushin and A.E. Yeronin. The beginning of the Mesozoic stage dates to the end of the 1940s. The main production was associated with the Upper Cretaceous sediments. At the end, an assessment of the current state of the structure of proven reserves is given. In conclusion, an assessment of the opportunities aimed at further development of the field associated with the additional exploration and additional development of the Miocene and Lower Cretaceous deposits is given.
Strength and deformation characteristics of fiber concrete modified with a peat additive
Authors: Demyanenko O V , Gorlenko N P , Sarkisov Yu S , Kopanitsa N O , Gorynin G L , Ikonnikova K V
Published: August 2020

Dry mixtures are widely used in modern construction. Development of new modifying agents for improving of dry mixtures performance characteristics and increasing its economic efficiency is an important problem. The paper presents study results of the effect of additives based on thermo modified peat on properties of cement mortars. It is established that introduction of additives in the mortars compositions provides improving of their strength and deformation properties.
Solution of multidimensional system with XY differentiation of probability density equations for identification of silver nanoparticles on fibers
Authors: Emelyanov V M , Dobrovolskaya T A , Emelyanov V V
Published: August 2020

The article presents the results of compiling and solving a system of multidimensional differential correlation equations of probability densities for identifying colloidal silver nanoparticles on polyester fibers with multidimensional correlation components of Raman polarization spectra. A method is proposed for increasing the accuracy and speed of identification of silver nanoparticles on polyester fibers, taking into account the longitudinal and transverse polarization of laser radiation over the entire range of the Raman spectrum with the analysis of two peaks sequentially and in order at the same time along the X-side and along the Y-side of the fibers. To implement the method, a program was developed in the Mathcad software. When solving the system using the nonlinear quadratic and differential equations with respect to XY, the probability density equations of distribution ellipses obtained very high accuracy p0 and p1 up to 10−16.
Geophysical prospecting and well reliability indicators
Authors: Fedorova N G , Dimitriadi Yu K , Muradkhanov I V , Kaverzin S A , Akopov A S , Chernenko K I , Ryapolov N A , Voropaeva E D
Published: August 2020

The paper considers the issues of well reliability indicators (strength, durability, safety) determined using the results of geophysical prospecting of the technical condition of the support as initial data. It is shown that it is possible to establish (recognize) the technical condition of bearing elements of well support, if according to the results of instrument studies, the types of damages are identified, their dimensions are established and actual strength parameters are calculated. Forecasting of service life is connected with the identification of a support element limiting service life of wells and determination of dominant mechanism of its damage for predicted operation period. The definition of well safe operation life is connected with the development of well reliability system. An example of elements included in the well reliability system is given, each of which is assigned a corresponding significance factor. The evaluation algorithm of the impact of properties of reliability system elements on its safe operation life is shown.
Studies of vertical position of building walls via surveying method
Authors: Gairabekov I G , Pimshin I Yu , Mintsaev M Sh , Gairabekov M-B I , Gayrabekova A I , Mishieva A T , Ibragimova E I
Published: August 2020

It is impossible to get a truthful overview of the strain-stress state of any object using the methods recommended by the current regulatory documents to determine the roll of buildings and structures. This paper implements the proposed method of determining the set of roll values by vertical sections of the object. Such a method allows obtaining a detailed picture of deformations, on the basis of which it is possible to develop a qualitative project to restore its design geometry. The paper presents the implementation of methods for determining the complex of values of building rolls with both classical and hinged ventilated facades. The rolls were determined according to 17 vertical sections (9 measurement cycles in total) for a building with a classic facade and 53 vertical sections (53 measurement cycles in total) for a building with a hinged ventilated facade. The results are presented in graphical and tabular form.
Study of static and dynamic geometric characteristics of buildings
Authors: Gairabekov I G , Pimshin I Yu , Mintsaev M Sh , Gairabekov M-B I , Gayrabekova A I , Mishieva A T , Ibragimova E I
Published: August 2020

It is impossible to get a truthful overview of the strain-stress state of any object using the methods recommended by the current regulatory documents for determining deformations. This paper implements the proposed method of determining the spatial geometry of an object. Such a method allows obtaining a detailed picture of deformations, on the basis of which it is possible to develop a qualitative project to restore its operational reliability. The rolls were determined according to 38 vertical sections (9 measurement cycles in total) for a building with a classic facade and 53 vertical sections (2 measurement cycles in total). Besides, five cycles of determination the settlement of structure were performed. The trigonometric leveling was used to control the horizontal position of different level building structures (top of window aperture of the 2nd floor). Elevations of horizontal building structures were determined in different conditional systems of heights. Elevations of horizontal building structures were determined in a single conditional system of heights. The results of the method are presented in graphical and tabular form.
Development of a digital surface model and a digital terrain model based on ERS data
Authors: Gairabekov I G , Hamzatov A I , Mishieva A T , Ibragimova E I , Gairabekov M-B I , Gayrabekova A I
Published: August 2020

The paper considers the development methods of a digital surface model and a digital terrain model of the Dead City territory. The work utilizes the Phantom 4 PRO UAV with high flight stability and excellent shooting quality (camera 20Mg/px) with 4K resolution that allows creating qualitative DSM, DTM with a possibility of storage, processing, transfer on various platforms in different formats.
A new method for controlling the quality of technological products
Authors: Karmishin A M , Orlik L K , Zhukova G S
Published: August 2020

The problem of conformity of products to the requirements of technical control or between products of different batches puts the methods of experimental determination of product properties high on the agenda. The measurement of the parameters of these properties is stochastic. Some product properties can only be determined in specially designed experiments. Thus, in the production of powders, their dispersion can be normalized, the specific charge of condenser powders can increase, the location of magnetic granules of nanoparticles on information carriers can be controlled, the content of physiologically active substances in drugs can be controlled, and the spectrum of mobilities of atmospheric particles can be analyzed. Possible approaches to solving the problem of checking a batch of products for compliance with the requirements of technical specifications (TS) are considered using the example of powder dispersion. For the first time, a method has been proposed for comparing product properties, which are continuous random variables, by determining the joint area under their differential curves. The decision on the conformity of the measured product properties to the requirements of technical specifications is based on a comparative assessment with the directive established joint area under the distribution density curves. The technique of determining the probability of correspondence of normal distribution laws to each other is described. A final analytical solution is obtained for two exponential distribution laws.
Force modeling of interparticle pair interaction of spheroid in composite cement
Authors: Khalyushev A K , Scherban E M , Stelmakh S A , Nalimova A V , Egorochkina I O , Sysoev A K , Zholobova E A
Published: August 2020

The paper discusses the modeling of the forces of interparticle pair interaction of spheroidal agglomerate in composite cement. Based on the calculation of the autohesion forces that make up the spheroidal agglomerate, i.e. the Portland cement (“carrier particles”) and silica fume (“guest particles”), it was found that for uncharged particles the magnitude of the electric interaction forces is negligible in comparison with molecular van der Waals and capillary forces. The bipolar charging of particles in the corona discharge field at a corona electrode potential of +18 and –18 kV sharply increases the electric component of the autohesion force, which in value approaches the value of capillary forces. In this case, the Coulomb attractive forces between oppositely charged particles begin to act before the direct contact of the particles, which contributes to the agglomeration of particles. These calculations are confirmed by the results of scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) of composite cement samples containing Portland cement (75 %) and dry gas purification silica fume (25 %), the number of angular particles of irregular shape decreases for a mixture of these materials processed in the device for surface modification.
Diagnostic ratios of individual polycyclic aromatic hydrocarbons for their identifiaction in soils of power station
Authors: Sushkova S , Minkina T , Batukaev A A , Dudnikova T , Batukaev A A , Shavanov M V , Adymkhanov L K , Barakhov A
Published: August 2020

the article presents the study of the content of organic ecotoxicants – polycyclic aromatic hydrocarbons in the soils of the impact zone of the energy industry enterprise of Novocherkasskaya power plant (NPP) – the largest producer of electricity in southern Russia. The study showed a high level of total PAH content in the soils of the studied territory, compared to the background territories. The degree of contamination of soils in the zone of influence of the energy industry enterprises with Benzo(a)pyrene is classified as highly contaminated soils. The diagnostic relationships of individual PAHs showed a significant effect of the NchGRES on the soils of sites located along the line of the prevailing wind from NPP. For these sites, the pyrogen-coal origin of PAHs was established.
Magnetic and magnetoelastic properties of rare earth intermetallides based on TbFe2
Authors: Umkhaeva Z S , Ilushin A S , Nikitin S A , Aleroeva T A , Pankratov N Yu , Tereshina I S
Published: August 2020

The paper presents the results of the study of magnetic and magnetostrictive properties of rare-earth intermetallides based on TbFe2compound: Tb1-xZrxFe2, Tb1–xSmxFe2and (Tb1–xYx)0.8Sm0.2Fe2. These alloys have a cubic crystal structure of the Laves phase C15 throughout the substitution region. For the system of alloys Tb1–xZrxFe2the single-phase area is limited to the replacement parameter 0 < x < 0.2 and 0.8 < x < 1.0. The compounds of the Tb1–xSmxFe2system were studied via X-ray dilatometry. The magnetostriction of alloys within the Tb1–xZrxFe2and (Tb1–xYx)0.8Sm0.2Fe2systems was studied in the temperature range of 80-320 K in magnetic fields of up to 17 kOe via a strain-gauge method. It was found that each system has the phenomenon of sign inversion of magnetostriction constants: in the system Tb1–xZrxFe2in the area of replacement parameter x = 0.8, in Tb1–xSmxFe2- in the area x = 0.45, and in the system of alloys (Tb1–xYx)08Sm02Fe2at x = 0.6. It was demonstrated that magnetic compensation and spin reorientation phenomena occur in these systems. The obtained results are discussed in the model of alloys with competing exchange interactions.
On reasons for the deterioration of the bottomhole formation zone and recommendations for maintaining reservoir properties
Authors: Dubinskiy G S , Andreev V E , Kanzafarov F Y , Mukhametshin V S
Published: August 2020

The literature on the deterioration of reservoir properties of the bottomhole zone during various operations in the wells and when acting on the reservoir is reviewed. It was revealed that bullhead well control operations and impacts on the bottom-hole formation zone have a very large negative impact if the current geological and physical conditions of the object are not taken into account. Laboratory and field tests of several hydrocarbon-based emulsion formulations were performed. Experiments and tests have shown the effectiveness of the proposed formulations and allow recommend them for use in well repair.
Increased production of oil reserves in low production deposits of West Siberian oil and gas province
Authors: Stenkin A V , Kotenev Yu A , Sultanov Shamil Khanifovich , Mukhametshin V V , Kuleshova L S , Safiullina A R
Published: August 2020

The paper considers the issues of assessing the influence of various factors on the production of oil reserves of Jurassic deposits of Shaimsky oil and gas region. The study states the influence of the network of disjunctive tectonics dividing the deposit onto the network of blocks on the degree of oil recovery. Trace research was conducted. Dependencies showing that hydrodynamic connectivity between wells takes place along fault lines or close to them, which is caused by the formation of decompression zones with increased permeability, are obtained. It was found that in the central blocks of the deposit there are large effective oil-saturated thicknesses with higher reservoir properties, which does not allow faults with low displacement amplitude to disrupt the connectivity.
The choice of the correlating function of capillary pressure curves under conditions of reservoirs in Western Siberia
Authors: Akhmetov R T , Mukhametshin V V , Kuleshova L S , Mingulov Sh G , Malyshev P M
Published: August 2020

The article considers the approximation of capillary pressure curves of productive formations in Western Siberia. The relationship between the correlating functions of capillary pressure curves is shown: the Leverett J-function and the Brooks-Corey function. In this case, the Brooks-Corey function is the same Leverett function but used for water saturation of the effective part of the void space (reduced water saturation). The authors recommend choosing a correlation function for a given reservoir, depending on the tightness of the correlation between capillary pressure and volumetric or reduced water saturation. In this case, the Leverett function should be preferred, since it depends only on two parameters (permeability and porosity).
Modern specific of Japanese urbanism as a result of the country’s cultural mentality distinctiveness
Authors: Shevtsova G V , Gorbyk O O , Kubko A Y
Published: August 2020

The article analyzes the urbanistic experience of modern Japan in terms of the country’s architectural history. The following features of Japanese modern urbanistic are highlighted: dynamism and mobility – the ability of permanent development and modification (so called architectural metabolism); communicativeness of city space; the cohesion of the concepts of interior and exterior; freedom and novelty of architectural forms; humane and psychological comfort of urban environment. Based on the analysis of the unique climatic and seismological conditions of Japan, its geographical, ethnic and historical characteristics, it is revealed that all indicated above modern urbanistic features originate in the prerequisites of Japanese mentality formation directly related to architectural traditions. Since ancient times, Japanese culture has easily adapted to new circumstances modifying both obsolete traditional phenomena and foreign influences to a fundamentally different level. During the industrial revolution, thanks to the active borrowing of European and American engineering experience, such an approach leads in Japan to a qualitative leap of urbanism and design, forming an imaginary gap between the historical and modern architecture. In reality, urban planning and architecture of modern Japan demonstrate a deep genetic connection with historical tradition, which is present here as a permanent global evolutionary vector of ideas.
The influence of traditional architecture on the design of social housing by masters of modernism
Authors: Kudryashova I , Martynenko A , Remizova O
Published: August 2020

The work is devoted to the study of the influence of folk architecture on the professional practice of housing design by modern architects. The study focuses on the use of traditional heritage techniques in the design of social housing in modernism in the period 1910-1970. The procedure of reproducing the experience of traditional (vernacular) architecture is described as a process of translation, which involves the decoding of folk heritage by professional architects in order to identify the characteristics and techniques relevant to the “modern movement”. The task of designing housing for the working class is observed throughout the period of modernism in various regional areas, from European countries and America to Egypt, Algeria and India. Historical analysis of the architecture of modernism helped to identify such valuable for its representatives’ qualities and properties of traditional architecture as: functionality, utilitarianism and archetypal. It has been proven that modernists were inspired by the architecture of traditional Mediterranean cities. It is shown that in the period of modernism, along with engineering innovations, architects introduced traditional design systems, materials, technologies and rethought their compositional potential, which significantly diversified the morphology of social construction and enriched its symbolic language. Thanks to the borrowing of traditional features, modern architecture has become clear to the consumer, and such morphological elements as a flat roof, white walls, simple rectangular columns and so on have become a new and quite understandable language of modern architecture.
Information Field of the Modern city silhouette
Authors: Martyshova L S
Published: August 2020

A modern city in all its aspects is a product of diverse information and semantic features that have been expressed in different ways in different times. Time continuum of urban existence and globalization are leading to universalization of rules and methods, on the one hand, and to the destruction of the identity and integrity of the landscape and architectural urban environment, on the other. They are demolishing the system of conceptual references and transforming historic time-tested cultural codes. Today the system information balance is intensively evolving under the influence of time and objective information reality, shifting historically tested and conventional highlights. The information field of the city silhouette is considered as integrity, having a universal algorithm and code, whose revealing and defining promote the recognition and proper interpretation of the most typical features of the contemporary urban environment in the city silhouette structure. The use of the algorithm and code as design and analytical tools for city planning enables to create integrated structures and unify conceptual information on the city silhouette, which form the system of landmarks for human world perception.
Types of ecological relationships in the system “nature, artificial environment, humans”. Peculiarities of modern eco interior development
Authors: Zymina Svitlana
Published: August 2020

The article addresses the main ecological trends of the environmental protection in the field of architectural design and construction, which are united under the common name of eco-construction. The article analyses various types of environmental relationships according to the degree of harmfulness of their impact on the artificial environment, nature and humans because of their construction activities. A graphical model is proposed, which clearly demonstrates how ecological relations (harmless, conditionally harmful and harmful) interact with nature, humans and the artificial environment. The human being as a component in the chain of relationships is present in all these spheres; in the artificial environment factor - as motivation and the main driving force, and in the natural factor - as part of its creation, it always balances between nature and the artificial environment. The search for a solution to the global environmental problem has led to the emergence of such concepts as ecological interior and eco-style. Based on the author’s classification, the peculiarities of the formation of a modern ecological interior are explained. The difference between the concepts of ecological interior and ecostyle is revealed, a new kind of ecostyle is proposed in the classification of eco-directions - pseudo-ecostyle, its features are considered.
Architectural and City-Planning Aspects of Innovation Hubs Formation in the Context of Creative Urban Regeneration (On the Case of Ukrainian Cities)
Authors: Holubchak K T , Sleptsov O S , Tomlins R
Published: August 2020

Cities have become the key arenas of territorial competitiveness in the context of creative economy development and continuous innovation processes in all the spheres of social life. Functioning as a community of knowledge, innovation, creativity and learning, modern cities are becoming more dynamic, complex, diverse and open. In this context, new urban strategies and trends need to be taken into account. The concepts of “innovation hub” and “creative city” as a result of the process of creative urban regeneration are covered in the paper. The article states that innovative creative spaces provide unique opportunities to accelerate the generation and diffusion of innovation, especially through effective communication channels and a positive innovation ecosystem. The article covers the topic of architectural and functional aspects and design tendencies of innovative hubs in the structure of a creative city. The research material includes the architectural analysis of existing innovation hubs in Ukraine.
Innovations in the Architectural Environment: the Impact of Society on the Positive Perception and Conflict of the Incomprehensible
Authors: Mezhenna Nataliia , Filippova Daria
Published: August 2020

The article is focused on issue of human perception of new objects of architecture and design, overcoming people’s commitment to the old and familiar. New ideas often face a negative reaction from society. Modern architecture, any projects of modern style, cause not only curiosity in its viewers but irritation, stress, negativity, psychological aversion as well. Original and common information of perception of the architectural environment is characterized by a dialectical unity. With complete originality there is a conflict of the incomprehensible. With complete commonness – the conflict of oversaturation. Unapprehensiveness generates the transfer of functions, the transfer of an object to another functional group. The more developed the society and the specific observer are, the easier it is to perceive new forms and technologies for them. There is a larger amplitude scale at the stage of information filtering. The development of society brings perception to a new stage, new forms and styles transform into typical ones, a psychological adaptation occurs. Crisis situations in a country and the general perception of life as critical, non-positive notion forms a negative reaction to new proposals. The situation is similar to “Seligman’s dogs”, the so-called learned helplessness. The psychological impossibility of non-action is the impossibility of thought, the unwillingness to look for analogies and images that would lead to metaphorical matches. Often the perception of a new object can be influenced in advance by technologies and mass media. In order to resist these technologies, to have his own, personal opinion, a person needs a high level of knowledge, world outlook, synthesis of information about the object. The formation of new human values, raising living standards lead to an adequate perception of the new architectural environment.
Conceptual modeling to control the quality parameters of the BIM model
Authors: Kysil Olga , Mikhalchenko Sergii , Tovbych Valery
Published: August 2020

This study pays attention to the quantitative and qualitative analysis of the project in the BIM (building information model) form, as well as the relevance to this scientific topic. The definition of ETR (Electronic Terms of Reference) is given. The working hypothesis of the research is described, which consists of several main stages. The novelty of the application of quantitative and qualitative analysis to BIM is emphasized and the method of its automation is described. An example of a typical object is chosen, on which the practical stage of assembling the ETR is carried out and an algorithm for quantitative and qualitative analysis on this basis is developed.
The conception and development tendencies of the helicourts network design in the world
Authors: Semyroz N H , Kysil S S , Sleptsov O S , Safronova O O , Bulhakova T V
Published: August 2020

The article analyses the origin and development of helicourts [1,2]. This is the new type of constructions which located on top of the roofs of skyscrapers and designed for users of air transport. Historical analysis was performed on the topic of cities design within the vertical plane, including the idea of traffic separation. The modern tendencies of how this issue is resolved were analyzed on the example of São Paulo and Kyiv. It is established, that in modern metropolitan areas there is ongoing new technological revolution, which aims at a radical change of transportation mode in cities, leading to the emergence of the modern aircraft. The main principles of formation of helicourt design decisions within the structure of high-rise buildings in metropolitan areas are: structurality, dominance and form. It has been determined, that the preservation of historical development, natural areas, and improvement of both transport connectivity and the environment where human activity is concentrated in cities can be solved by the introduction of a complex of structures that serves helicopter aviation, and that are located within the structure of multi-storey buildings.
Innovative concepts in the Kharkiv projects of J. Steinberg of the capital period
Authors: Maimeskul O V , Mamon A S , Rusanova M V
Published: August 2020

The innovative concepts of Jacob Steinberg, one of the leaders of constructivism architecture, the head of the Society of Modern Architects of Ukraine (OSAU) are considered. The projects of J. Steinberg by the purity of functionalist literacy are comparable to the projects of leading OSA masters. Among Steinberg’s Kharkiv projects - recognized as masterpieces of constructivism - the Builders’ Club, the building of the Central Committee of the CP(b)U, a complex of the Kharkiv Civil Engineering Institute on Shatilovka, a residential complex on the Pushkinskyi entrance. The unique Steinberg’s objects, that were revolutionary for their time, weren’t taken under protection and today they have been lost, rebuilt, or are in ultimate limit state. His legacy is still waiting for his collectors, organizers and researchers. Comprehensive research is needed, on the basis of which it will be possible to develop a strategy for documenting and preserving the Kharkiv objects of an outstanding Ukrainian architect. This applies to the possibility of complete restoration of the houses at the Pushkinskyi entrance, removal of distortions introduced into the building of the Builders’ Club during the post-war restructuring, graphic reconstruction of the lost Central Committee building and irreversibly rebuilt complex of ex. KhICE. The report discusses the prospects for the formation of citywide and national programs for research, documentation and preservation of the architectural heritage of interwar modernism.