bluuebunny/crossref_metadata_2025_split huggingface dataset:
Stabilization of the soil bases contaminated with peracetic acid
Authors: Levenko H M 
Published: December 2019

AbstractThe solution of the urgent problem, which is connected with the substantiation and development of the method of fastening of soil bases, acidified by industrial flows of food industry enterprises, is formulated and substantiated. It was established that in the food industry widespread use was made by washing and disinfectant Oxonia Active-150 on the basis of 25 % peracetic acid. This substance as a result of leakage and sewage emissions, getting into the soil basis, reacts with the chemically active substances of the soil, which leads to swelling of the base. It has been found out that the most effective way of stabilizing the behavior of soils of the bases contaminated with industrial effluents is the injection methods of fixation, in particular, silicification. It is established that for today there is no method of fixing soils contaminated with solutions of peracetic acid, which would solve the problem not only improving the mechanical characteristics of contaminated soils, but also would take into account the environmental aspect of the problem. For this purpose, the main approaches to solving the problem of fastening and ecological cleaning of soils contaminated with solutions of peracetic acid have been developed and substantiated. A scientifically and experimentally grounded method for calculating the chemical fixation of soils, which are prone to contamination with solutions of peracetic acid, is proposed. The model of the grounded choice of method of fastening and clearing of soils, which takes into account all requirements, which are advanced to arrays of fixed soils, is offered. The basic technological and chemical criteria for choosing a method for fixing a contaminated soil mass are determined.
On the issue of water activation for Portland cement
Authors: Nikolaev A P , Kondrachenko E V , Kondrachenko V I 
Published: December 2019

Abstract
The articles is devoted to the problem of Portland cement activity increase by changing its mixing water structure due to mechanical, magnetic, electromagnetic and certain other treatments. Known facts are analyzed on specific condition and behavior of cement grout liquid phase which is determined by the effect of crystalline field of the surface of cement minerals. The authors substantiated that this condition is more important for cement behavior under hardening than the consequences of eventual structural changes in its pretreated mixing water. An original method for controlling the hardening of cement paste based on measuring the hardness of cement samples is proposed. The method allows you to control the behavior of the material itself without taking into account the influence of the size and shape of the analyzed samples.
Mechanism of formation of microstructure of thin-layer coating based on Portland cement
Authors: Plakhotnikov K V , Demina O I , Bondarenko O I , Plakhotnikova I A , Miroshnichenko S V 
Published: December 2019

Abstract
Coatings based on mineral binders with inorganic hollow microfillers are effective thermal insulation materials. However, they have poor physical and mechanical characteristics, and this prevents from their extensive practical use. The purpose of the work is to develop the composition of a thin-layer thermal insulation coating based on Portland cement with addition of a complex additive intended to improve its physical and mechanical properties. The use of this additive facilitated the additional on-surface synthesis of microspheres of crystalline hydrates in the form of aggregate gels, ettringite needles and laminar structures, as well as the compacting of the structure of a thin-layer thermal insulation coating with crystalline hydrates formed during the clinker aluminate phase. These structural changes contributed to the improvement of physical and mechanical parameters of the thermal insulation coating.
The role of the crystallo-chemical factor in the evaluation and improvement of the nanomodification efficiency of mortar and concrete
Authors: Pushkareva K K , Gonchar O A , Kaverin K O 
Published: December 2019

Abstract
The article presents a new approach to the control of the processes of structure formation of binder systems, taking into account the achievements of nanotechnologies. The possibilities of managing the structure of the material at the nanoscale and the micro-level by introducing primary nanoscale additives or forming nanoscale objects in the bulk of the material are considered. The peculiarities of contact zone formation and microstructure of artificial stone based on nanomodified Portland cement and alkaline binder systems are investigated. The role of the crystallo-chemical factor and its influence on the strength formation of all levels of concrete structure are shown. It is proved that when using micro silica modifying additives, their efficiency at the micro level is higher than at the meso- and macro-levels. At the same time, the modification of the binding systems by artificial zeolites provides a more pronounced effect in concrete at the macro-level – due to the crystallo-chemical similarity of additives, products of hydration and minerals of the aggregate. Taking into account the crystal-chemical similarity of the new formation opens new possibilities for the choice of nano additives, considering not only the principle and nature of their action at the level of nanoscale and microstructure, but also the influence on the peculiarities of the formation of the contact zone at the meso- and macro-levels, which will have a decisive influence not only on the strength, but also on the special properties of concrete.
The electric surface interaction in the soil-slag-biological solids system
Authors: Trykoz L V , Panchenko S V , Bondarenko D O , Plugin A A , Borziak O S 
Published: December 2019

Abstract
The issue of wastes reclaiming in large cities is really a pressing problem today. First of all, the wastes which occupy wide areas of land need to be reclaimed. The metal production slag and waste water sediments are typical examples of such waste products. They create a wide area of ecological and social discomfort when collected and accumulated in large quantities after treatment. The purpose of this study is development of new soil materials which include waste products. The material properties can be influenced in a level of electric-surface interaction of the studied system components. The phase boundary presence and high degree of dispersion of the components require considering the sign of the charge of the particle surface and the particle size, influence of the charge on the nature of interaction between the surfaces and thus allows defining possible methods of modifying the surface properties in order to obtain materials needed. This includes modification of the surface of the aggregates and filling agents, activation of the functional groups, dispersed system stability, coagulation control, etc.
Concrete as a self-organizing system
Authors: Vyrovoy V M , Korobko O O , Sukhanov V G , Posternak O O 
Published: December 2019

Abstract
All levels of the product heterogeneities, including the product itself, are open complex systems, which are organizing themselves in autopoiesis mode. Such order of structure formation assumes a certain selectivity of the organization of the system while maintaining its openness to the influence of the environment. Factors of control may only initiate structural changes, but do not determine in what ways they will occur. The mechanisms of the structure organization at the selected levels of heterogeneities are qualitatively differing. Individual complex of processes and the phenomena is realized at each level; however, all heterogeneities are in the multi-scale co-ordination and influence each other, causing the interconnected structural variations. This supports the self-organization of the material structure. The mutual influence of the structural self-organization of individual levels of heterogeneities at the formation of the integral concrete structure is analyzed. Deformations determine the structure formation and functioning of concrete. Controlling the manifestation of deformation allows providing a directed structure of the material. For receiving the given sets of active elements, the factors controlling the processes of organization of micro- and macrostructures of concrete are accepted.
Dependence of Lamé transformation for concrete pipeline design calculation
Authors: Younis B , Saienko L 
Published: December 2019

Abstract
Determination of concrete strength and wall thickness for low pressure concrete pipe underground pipeline by possible way to identifications of the known dependencies by entering the correlation “wall diameter/wall thickness” and transformation of the Lamé formula. The conversion of the known dependencies, allowing to determine the normal hoop stress from the external equivalent load and internal pressure according to the Lamé dependence, allowed us to obtain new transformed dependencies for calculating the stresses in pipes under the combined action of internal pressure and external (reduced) load. Using the obtained equations allows you to determine the range of application of concrete (without metal reinforcement) pipes and select the concrete composition for the pipe production. It was determined in this study the stresses in the walls of concrete pipes under the combined action of an external (compressing pipe) load (the pipeline depth – the magnitude of the working fluid pressure) and internal pressure from the fluid transported under pressure.
Stress-strained state of steel-adhesive bonding on the acrylic adhesives
Authors: Zolotov S , Pustovoitova O , Firsov P , Kais Husain , Kamchatna S 
Published: December 2019

Abstract
Experimental results of determination of strength and deformation properties of acrylic glues of different compositions at short term, long term and cycle loading, as well as the character of their destruction are given in the article. Since acrylic adhesives are commonly used in construction activity, their physical-mechanical properties were determined, taking into account the type of action of the forces on them in the bonding of building constructions and elements. These forces include: compression, extension and shear. In the process of experiments in the composition of the acrylic adhesive the ratio of polymer, hardener and filler was taken into account.
The use of data by smart systems for price forecasting in the context of building customer relationships on the Lublin real estate market
Authors: Bojanowska A , Lipski J 
Published: December 2019

Abstract
This article aims to show how to design a functional application as an intelligent tool for forecasting real estate prices, among others, based on historical data. Real estate dealers or clients in this market are rarely aware of the possibility of using such a tool in the real estate valuation. This paper presents how the artificial neural network can be used for this purpose. The selected area of the Lublin real estate market has been covered by research carried out for this study. As input data for the smart system, historical data of transactions and variables characterising real estate were used, such as location of the property, its condition or size. Using the developed model, in the neural network, the sensitivity of the real estate price to selected features was carried out. It was also indicated how the use of this tool can facilitate purchasing decisions and customer relationship management on such a market.
Gas network improvement proposal using numerical simulation
Authors: Jurek T , Iwanek M 
Published: December 2019

Abstract
Simulation software packages are very useful tools for evaluating hydraulic conditions in gas systems, and therefore for supporting the design process, network maintenance and decisions about rerouting or modernisation of a network. In the range of this paper, a model of a real branched gas network covering 3 towns was created in the GAZNET software. At first, actual hydraulic conditions of gas flow in the pipes were simulated to evaluate distributions of flow velocity and pressure in the pipes. The obtained results indicated meaningful pressure drops and increase in flow velocity in some sections of the model, which not only constitutes a threat to provide required parameters of gas to consumers, but also forecloses connecting new consumers to the network. Thus, two variants of improvements were proposed: (1) expanding the network by building two additional sections or (2) increasing the number of gas sources by building additional pressure reduction and measuring unit. Conducted simulations indicated that changes of the network proposed in both variants clearly improve hydraulic conditions in the network model. However, the first variant was chosen as a better alternative, because distribution of hydraulic parameters in the model was more homogeneous than in the second variant, as well as because of economic considerations.
IT support for optimisation of abrasive water cutting process using the TOPSIS method
Authors: Radomska-Zalas A , Perec A , Fajdek-Bieda A 
Published: December 2019

Abstract
Modern production processes are becoming increasingly complex. At the same time, customers require high-quality products at the lowest price. This situation increases the importance of optimisation of production processes from the preparation of production to its implementation. Various methods of process optimisation have been devised to respond to the emerging phenomena including organisational aspects, device design, quality engineering and process automation. The TOPSIS method is used to make multi-criteria decisions. In this paper, a methodological study of this method was carried out, indicating conditions of applicability, assumptions and limitations, and the use of the TOPSIS method in the IT system supporting the optimisation of industrial processes on the example of waterjet cutting optimisation.
Numerical model for thermal calculation analysis of the wheel hub motor for electric car verified by laboratory tests
Authors: Bedkowski B , Dukalski P , Jarek T , Wolnik T 
Published: December 2019

Abstract
The article concerns the thermal analysis of an electric motor for mounting in a wheel hub of an electric car. The CFD model was calibrated on the basis of the results of laboratory tests of the prototype electric motor. The analysis was aimed at recognizing the possibility of increasing the load capacity of an electric motor through the use of dielectric materials with higher thermal conductivity than those used in the actual prototype. The authors presented the problem of heat removal from motors in wheel hubs, construction of the electric motor, the calculation model and analysis of calculation results.
Study of operating parameters of a plate conveyor used in the food industry
Authors: Caban J , Nieoczym A , Misztal W , Barta D 
Published: December 2019

Abstract
Internal transport (means of continuous transport) is an inseparable element of technological processes in the food industry. The selection of appropriate parameters of the transport equipment depends on the product being manufactured, its design features, packaging and transport conditions. The paper presents the characteristics of a plate conveyor, selection of operating parameters in the juice transport process in a glass bottle. The paper presents selected test results depending on the linear speed of the plate conveyor, the angle of inclination of the load mass transport module and the position of the gravity centre. The work defined the linear speed ranges of the conveyor and the angle of inclination of the conveyor transporting module for transported glass bottles filled with juice.
Analytical method for projecting the buckling form of composite palates with a cut-out
Authors: Falkowicz K , Szklarek K 
Published: December 2019

Abstract
The work focused on the original concept of a thin-walled plate element with a cutout, for use as a spring or a load-bearing element. The subject of the study were rectangular plates with a cut-out with variable geometrical parameters and with a variable angle of fibre arrangement, made of a carbon-epoxy composite with high strength properties in an asymmetrical lay-up, subjected to uniform compression. The paper presents a method of predicting the buckling form of composite plates with a cut-out ensuring the stable nature of the structure’s work. The influence of geometrical parameters of the cut-out and the angle of fibre arrangement on the value of the critical load of the structure and buckling form was investigated. The commercial ABAQUS programme using the finite element method was used to develop the discrete model and perform numerical calculations.
Numerical evaluation of friction effects on the energy absorption of square profiles under bending load
Authors: Estrada Q , Szwedowicz D , Vergara-Vazquez J , Rodriguez-Mendez A , Silva-Aceves J , Wiebe LC , Escarcega L 
Published: December 2019

AbstractFriction is often associated with undesirable effects on mechanical systems. However, friction could be useful to increase the energy absorption capacity of thin-walled structures subjected to bending loads. The current article proposes the use of friction as an additional energy dissipating mechanism to plastic deformation. For this purpose, three different friction fixtures are presented and numerically evaluated using Abaqus/Explicit software. The friction fixtures were placed at the ends of square profiles generating internal, external and combined friction. In all cases, the square profiles were made of aluminium 6063-T5. The reliability of the numerical results was experimentally validated by a modified three-point bending test with friction. The numerical results for the three arrangements were compared with the results obtained for a profile without friction. According to our results, in all cases friction improves the energy absorption performance of the square profiles in a range from 48.71% to 179.19%. Finally, the best crashworthiness performance was obtained when external friction is generated at the ends of the tube. An increase in the crush force efficiency (CFE) parameter up to 71.47% respect to a typical profile was computed. Thus, the effectiveness of the friction mechanism was demonstrated.
Numerical analysis of the thin-walled structure with different trigger locations under axial load
Authors: Rogala M , Gajewski J , Ferdynus M 
Published: December 2019

Abstract
This paper presents the results of the numerical analysis of thin-walled structures with a square cross-section. Aluminium models contain different types of triggers and distance to the base. Postbuckling analyses were compared with the form of the buckle to find the most beneficial location of the trigger. The study problem was approachedwith FEM Abaqus.Numerical analysis results are shown in theLoad–Shortening diagram. The data obtained during numerical analysis were used to determine the crushing efficiency indicators such as SE, CLE, TE. The aim of the research was to obtain the best efficiency indicators for the tested positions of triggers.
Milling process diagnosis using computational intelligence methods
Authors: Żabiński T , Piecuch G , Żyła R , Prucnal S 
Published: December 2019

Abstract
The paper presents the results of research aimed at developing a method for hard-to-machine metal alloy milling process diagnosis using computational intelligence methods. To diagnose the process, a signal from an accelerometer mounted on the spindle of a CNC machine was used. The data were recorded during milling of Inconel 625 alloy workpieces, performed by sharp and blunt cutters. The acceleration signal metrics, both in the time and frequency domains were used to develop the classifiers. Based on the experiments, it has been demonstrated that it is possible to effectively diagnose Inconel alloy workpieces milling process using shallow computational intelligence methods (decision trees, k-NN and linear support vector machines). Python was used for data processing and visualisation as well as classifiers development and testing.
Study of buoyant force acting on different fluids moving over a horizontal plate due to forced convection
Authors: Singh J , Singh C 
Published: December 2019

Abstract
In this paper, the effect of buoyancy force on heat transfer over flat plate due to forced convection is investigated numerically. The governing equations namely continuity, Navier-stokes and energy equations were discretized by using an explicit finite difference technique. Code generation has been done in FORTRAN-95 programming language. The testing of FORTRAN code has been done for different fluids at different grid points. The length of horizontal flat plate (x) was taken as 0.5 m. The inlet velocity of fluid (u) at the edge of plate was taken as 3 m/s. The kinematic viscosity (υ) of air and water at 323 K were taken as 17×10-6 m2/s and 66×10-7 m2/s respectively. The surface temperature (Ts
) of plate and flow temperature (To) of fluid were taken as 300 K and 323 K respectively. The grid was discretized by continuous method into 1001×101 (m×n) mesh points. The results show the boundary layer thickness, velocity and temperature evolutions, and heat transfer coefficient formed by different fluids. Also, the heat transfer coefficient to surrounding fluid across flat plate was found higher for air as compared to water. Results showed that buoyancy force acts from downward position so it was observed maximum at lower distance of plate. However, buoyancy effect reduces as the distance of x increases.
Selection of the optimal unit of analysis in assessing the structure of terrestrial arthropods assemblages
Authors: Kirichenko-Babko M , Danko Y , Majerek D 
Published: December 2019

Abstract
The article shows the use of statistical methods of multivariate analysis on the example of environmental data – the species composition of terrestrial arthropods. It is shown that the research results largely depend on the scale of observations made – whether it is a study conducted in a whole ecosystem or in a separate landscape element, type of habitat or, finally, an analysis of elementary samples. The results and their interpretations directly depend on the scale chosen by the researcher. We were mainly concerned with the reliability of using of multidimensional statistics in practical situations.
Synthesis of anisotropic Au–Cu alloy nanostructures and its application in SERS for detection of methylene blue
Authors: Singh Manish Kumar , Chettri Prajwal , Basu Joysurya , Tripathi Ajay , Mukherjee Bratindranath , Tiwari Archana , Mandal R K 
Published: December 2019

Abstract
Au–Cu alloy nanostructures have been synthesized in aqueous phase through co-reduction of HAuCl4.3H2O and CuCl2.2H2O by glucose in presence of hexadecylamine at ∼80 °C. By changing the synthesis conditions, nanostructures of various shapes such as nanowires, multiply twinned tripod, tetrapod, etc were observed. Systematic variation of the synthesis condition not only leads to change in size and particle morphology but also develops various other crystallographic characters in the nanoparticles. Alloying behavior of Au–Cu has been examined through transmission electron microscope operating in its conventional and analytical modes coupled with high resolution phase contrast microscopy. These results suggested that nanostructures are composed of homogeneous Au–Cu alloy. Preferential attachment along {111} and {100} crystallographic facets of Au–Cu alloy nanoparticles led to the formation of nanowires. Multiply twinned branched shape Au–Cu (width of branch ∼30 nm) nanostructures exhibit localized surface plasmon resonance maxima in the near-infrared region. The branched shape Au–Cu alloy nanostructures display better surface enhanced Raman scattering response in the detection of methylene blue as compared to spherical Au nanoparticles.