bluuebunny/crossref_metadata_2025_split huggingface dataset:
Application of Case-study for solving problems of measuring the level of phenol pollution of the Orel River in the training of future ecologists
Authors: Yekimov Sergey , Ershova Irina , Morozov Alexander , Fedorchuk Yulia , Revazov Vladimir , Philippov Victor , Telesh Andrey , Plyushch Irina 
Published: May 2021

Abstract
In the modern world, rapid changes are taking place in many areas of human activity. The processes of globalization and the acceleration of scientific and technological progress require the search and introduction of new educational teaching technologies in the educational process. The requirements for teaching methods and their quality are steadily increasing. The methods of professional training used in the 20th century cannot provide the necessary level of quality in the new conditions, this creates the need for a constant search for even more effective approaches to the professional training of future specialists, including environmentalists. Motivating students to actively participate in the educational process, increasing their creative activity is important for them to gain new knowledge and skills. The most important condition for the formation of motivation is a close correlation between the educational process and the professional activities of future specialists. Case-study is, in our opinion, one of the most effective tools for improving the quality of training of modern specialists. Its functional capabilities largely meet the requirements that society imposes on the modern education system.
Modeling database management systems in medicine
Authors: Rakhimov Bakhtiyar S , Rakhimova Feroza B , Sobirova Sabokhat K 
Published: May 2021

Abstract
Nowadays, the role of computer and information technology in medical education is very important. Increasingly, information pressures are on the agenda for improving the methods of selecting, sorting and utilizing information for optimal, constructive, rational organization and management. To modeling database, fill it with new information, and use it, you need specific database management software - these are called database management systems. The theoretical basis of the spent researches is made by the theory of the functional analysis, methods of splines-functions and modeling, variation and difference methods, methods of the numerical integration, the generalized spectral methods, the theory of numbers and matrixes, and also the theory of parallel computing processes in database medical system. Computer technology in today’s world is the most modern mean of creating, maintaining, and storing new data. Database formation is based on the visualization, meaning, structure and volume of the object under investigation.
Development of a module for identifying a person by photography to improve the quality of the machine-engineering plant in remote mode
Authors: Shabalina D A , Yurkov S A , Masharova T V , Gerasimova E K , Pichugin S S 
Published: May 2021

Abstract
A machine vision performs a variety of face verification tasks in different infrastructure environments. A facial recognition system is technically implemented as an image recognition program. It serves to automatically identify a face in an image, and then identify the person by comparing and analyzing the biometric data of the human face. Cameras are able to capture an image at a distance, which is perfect for building monitoring systems and contactless biometrics. Such software systems are particularly important in the context of remote work of employees of industrial enterprises. The purpose of research is to develop and implement a facial recognition web service for the staff department of a machine-engineering enterprise. The web service should work in conjunction with the existing data bank. Tasks of research are: to consider the fundamental algorithms of facial recognition, to formulate the basic requirements for the development and implementation of the corresponding automated web service. The significant result of research is that the developed module uses library of computer vision algorithms, image processing and general-purpose numerical algorithms with open-source code. Identification system was checked by testing on the company’s website.
Two problems about calculating the number of palindromes with different numbers of digits
Authors: Lyubimov V V , Melikdzhanyan R V 
Published: May 2021

Abstract
The aim of this work is to obtain two types of regularities for calculating the number of palindromes. The main results of the work are presented by solving two problems. In the first problem describes how to find the total number of different locations of palindromes in binary digits that do not exceed the given numbers of digits. The second problem is devoted to determining the number of palindromes of an arbitrary number system that have the same numbers of digits. The theoretical results of the work are accompanied by examples of the application of the described regularities to obtain the total number of locations of the binary palindromes with the number of digits that do not exceed the specified, as well as to calculate the number of palindromes of different number systems with predetermined numbers of digits. The considered regularities are supposed to be applied in the analysis of numerical and computer data.
System for automated process parameters adjustment of packed absorbers intended for selective gas emissions treatment
Authors: Merentsov N A , Persidskiy A V , Golovanchikov A B , Lebedev V N , Groshev V V 
Published: May 2021

Abstract
The article represents the system for automated process parameters adjustment of packed mass exchange apparatuses intended for selective gas emissions treatment. It describes the flow chart and algorithm of adjustment program of the packed mass exchange apparatus. It also outlines the identification technique for required (optimal) flow dynamic operating modes of the mass exchange packed absorbers. The data obtained through automated adjustment of process parameters serve (are needed) for functioning of the self-adaptable automated mode control system of industrial absorbers for selective gas emissions treatment.
Role of MOOCs in teaching Mathematics to students majoring in Engineering
Authors: Vagaeva O A , Galimullina N M , Liksina E V , Efremkina I N , Lomakin D E 
Published: May 2021

Abstract
The research is dedicated to the features of providing mathematical training to would-be engineers through using the potential of mass open online courses. The article reveals the importance of mathematical training as the basis for forming the professional competence of engineers. A sociological poll among the participants of the educational process at Russian technical universities revealed high awareness of the professors about MOOCs (93.3%), while only 45.4% of students knew about such platforms. The undisputed leader by popularity among both professors (53.3%) and students (34.5%) is the project “National platform of open education”. The reasons impeding the use of mass open online courses are: the lack of spare time, the lack of skills of working in such format, and the lack of regulation for introducing the results of studying at MOOC into the formal educational process. At the same time, analysis of Coursera, EdX, Open Education, Intuit, Lektorium and Stepik platforms showed that, as of January 2021, 150 courses were available in the broad and specific mathematical domains. Intensification of using MOOCs in preparing for academic sessions may increase the efficiency of mastering knowledge and skills in solving practical mathematical tasks, which would improve training of the would-be engineers.
Digital twin in advanced training of engineering specialists
Authors: Masaev S N , Minkin A N , Yu Troyak E , Khrulkevich A L 
Published: May 2021

Abstract
A review of scientific literature showed the relevance of the issue of assessing the training of an engineering specialist. Engineering includes a variety of works that relate to production issues. To assess the training of an engineering specialist, the digital twin of the enterprise is used. The digital twin of an enterprise includes all major pre-production, production and production support processes. A method for assessing the competencies received by an engineering specialist has been selected. The set of competencies is associated with the ongoing processes of the digital twin of an industrial enterprise. The normal mode of execution of the enterprise production processes is measured. The mode of operation of the processes was measured taking into account the new competencies of an engineering specialist. The study proposes a methodology for assessing the competence of an engineering specialist. The assessment of the effectiveness of the training passed by him.
Optical properties of polycrystalline films of lead telluride with distributed stichiometry
Authors: Akhmedov T , Otajonov S M , Usmonov Ya , Khalilov M M , Yunusov N , Amonov A K 
Published: May 2021

Abstract
In this article, the optical properties of polycrystalline thin films based on PbTe with disturbed stoichiometry are considered. It is shown that in PbTe films with a lead excess of 1.2 wt %, the intrinsic absorption edge is shifted to shorter wavelengths of the spectrum, and this is due to the presence of shallow levels in the forbidden band. It was found that in the band of p-type PbTe spectra with an excess of tellurium of 2.8 and 3.8 wt %, there are additional bands with the cutoff energy hw=0.132 eV, which are associated with the presence of free tellurium.
Justification of the parameters of parts of a walnut cracking machine
Authors: Barakaev N , Mirzaev O , Toirov B , Alimov A 
Published: May 2021

Abstract
The article describes the design of the working drum in a nut grinding machine and its design. Depending on the size of the nut and as a result of the experiments, the structure and dimensions of the parts of the nut grinder are determined and the basic procedure for preparing the parts in accordance with the structure is expressed. The rotation speed of the drum was determined taking into account the weight of the nut and centrifugal force. The speed with which the nut enters the device is calculated depending on the speed of rotation of the drum. The determination of this speed allows the machine to work normally, and at the same time increases its efficiency.
Increasing the surface stability of the cutting tool through complex machining
Authors: Fedorov Sergey , Sharipov Jamshid , Abrorov Akbar 
Published: May 2021

Abstract
Nowadays, the application of multilayer coatings is widely used to increase the abrasion resistance of cutting tools. Before applying the multilayer coating, the selected cutting tool was purified in a bath with a disc cutting surface from quick-cutting steel and carried out the process of ion-nitriding or chemical-thermal treatment. In this case, nitrogen and argon ions diffuse over the surface of the disc cutter. Ion alloying using low-energy high-precision electron beams followed this process. The processing was carried out on a single-chamber two-system magnetron installation “RITM-SP-M”. Finishing was carried out by disc milling with Swiss Platit π311 ((TiCr)N-(TiAl)N-(CrAlSi)N+ion nitriding, (TiCr)N-(TiAl)N-(CrAlSi)N(nATCRo3)), (TiAl)N+ion nitriding + ion alloying (NbHf), (TiAl)N, (TiAl)N+ion nitriding, diamond-like coatings).Such multilayer coatings were tested at the Navoi mining and metallurgical plant “Navoi machine-building plant”. Machined disc cutters have been tested on 34XH1MA which is difficult to machine.
The diffusion problem
Authors: Volodina E V , Mikishanina E A 
Published: May 2021

Abstract
The study of diffusion processes is relevant in various fields: chemistry, physics, metallurgy, medicine, and others. The paper considers and solves the problem of diffusion of charged particles under the action of an electromagnetic field in a semi-infinite thin tube. The mathematical formulation is a boundary value problem for an inhomogeneous partial differential equation of the parabolic type. To obtain an accurate analytical solution, the operator method is used. The solution is initially obtained in the form of an image, and then the solution of the original problem is obtained using the inverse Laplace transform. The solution of the test example is obtained, a graphical image of the desired function is constructed in the MatLab software package.
Theoretical background for simulation of the interfacial layer “liquid-gas”
Authors: Ignatyev A A , Gotovtsev V M , Razgovorov P B 
Published: May 2021

Abstract
The study shows that macroscopic approach to the description of surface phenomena used to simulate the interfacial layer as a membrane using Laplace equation allows to calculate the shape of liquid meniscus regardless of the determination of height of liquid elevation in a capillary. The use of van der Waals statements to describe the state of the medium in the interfacial layer makes it possible to estimate the distribution of molecular pressure along the layer thickness. The tensor of interfacial stresses, represented by a set of ball and deviator parts, is determined based on continuous medium equilibrium conditions. The stresses that form the surface tension of the fluid are deviator components of the tensor. As a result, the study provides the expression linking the parameters of interfacial layer thickness and surface tension of liquid.
Reinforcing of polyethylene with carbon nanofibers: an approach to improve CNF distribution via pre-coating of CNF surface by PE
Authors: Petukhova E S , Fedorov A L , Bauman Yu I , Zdanovich A A , Mishakov I V , Matsko M A 
Published: May 2021

Abstract
The article describes a method of the synthesis of carbon nanofibers (CNFs) and a technique for obtaining masterbatches, which are represented by CNFs with a layer of pre-synthesized polyethylene (PE) on their surface. Using scanning electron microscopy, it was shown that in-situ ethylene polymerization over the catalyst anchored on the CNF surface allow to evenly cover CNFs surface by PE. Pristine and pre-coated CNFs were introduced to commercial PE matrix. It has been found that the reinforcing of PE with CNFs leads to improved mechanical properties and two times higher resistance to abrasive wear. The application of the proposed approach makes it possible to reduce significantly the carbon filler’s effective concentration and distribute uniformly the filler throughout the composite.
Parallel algorithms for the creation of medical database
Authors: Rakhimov Bakhtiyar S , Mekhmanov Mukhiddin S , Bekchanov Bakhtiyar G 
Published: May 2021

Abstract
Analysis of parallel algorithms for graphics processors allows you to determine the bottlenecks of the algorithm that affect its performance on a particular computing system. Algorithms can be analyzed both at the AGM level and at the level of the CPU-GPU system. Despite the fact that the model does not reflect the overlap of the execution of computational operations and operations of access to the global memory, but estimates the upper limit of the execution time of the algorithm on the AGM, in any parallel algorithms for the AGM it is necessary to reduce this parameter of the algorithm due to the large number of clock cycles spent by the multiprocessor to implement global memory access operations.
Electromagnetic field influence on the calcium carbonate crystallization in the iron ions Fe2+ presence in mineralized aqueous media
Authors: Alimbekova S R , Ishmuratov F G , Nosov V V , Voloshin A I , Alimbekov R I , Dokichev V A 
Published: May 2021

Abstract
The influence of electromagnetic field (EMF), created in the frequency range from 100 to 200 kHz, on the calcium carbonate crystallization from supersaturated aqueous solutions on the model system CaCl2 - NaHC O3 - FeSO4 at 80°C at a molar ratio of CaCl2:FeSO4 (100:1), on the steel surface and in bulk was studied. It was found out that iron ions reduce the poorly soluble scales formed total mass (mainly CaCO3) by ∼12%, both adhered to the steel surface and in the solution volume. Under the EMF influence, the adhered crystals amount on the steel surface in the Fe2+ ions presence decreases by 40% and in the absence by 14%. In volume, under the EMF influence, on the contrary, the crystals’ number increased by 15% in the iron ions’ presence, in the iron ions absence it decreased by ∼ 6%. In the Fe2+ ions presence and under the EMF influence, a decrease in the aragonite formation was noted while the calcite and vaterite content increased.
Solving the circuit equations using tensor decompositions
Authors: Lantsov V N 
Published: May 2021

Abstract
Tensor decomposition methods are widely used for solving high-dimensional and multi-dimensional problems. These approaches have a huge potential for reducing computational costs in the simulation of electronic circuits and in the CAD systems for electronics. Simulation of modern radio-frequency (RF) circuits, especially for RF integrated circuits, is one of the areas of extensive scientific research and development. The main problem of analysis methods for circuit design of RF electronics is the significant computational costs associated with the high dimensions to be solved. This paper shows that the computational costs of circuit design are largely determined by the costs of solving a system of linear algebraic equations (SLAE). The problems of the solving of SLAE are indicated in the paper. Further development of methods for solving and reducing computational costs requires the use of new approaches, one of which is proposed in this paper. The article presents the developed algorithm for converting a second-order matrix into a higher-order tensor. In this paper algorithms and software tools for tensor decompositions, as well as methods for solving SLAE in the representation of equations in tensor format are investigated. The results of numerical experiments and the results of comparison with traditional methods are presented.
The impact of engineering students’ communication behavior on the teams’ performance (case study: Chemical process engineering classes)
Authors: Ibatullina A R , Mingaliev R R , Khusainova G R , Bronskaya V V , Kharitonova O S , Krasina I V , Yakimova J Y , Parsanov A S 
Published: May 2021

Abstract
The activity of modern engineer requires the ability to work in a multi-discipline team and the ability to hand over clearly the professional information to the other team members who are specialists from another field. Therefore, according to the researches graduates from engineering universities lack skills of business communication and team work interaction. That is why the organization of work of future engineers in small groups fulfilling different team roles and the use of moderation methods for the achievement of the effective team cooperation will enable the achievement of the goal of necessary cooperation skills development.
Technologies and services in solving the problem of creating a common digital space of scientific and educational organizations
Authors: Losev V V , Kovalev I V , Saramud M V , Lifar A S 
Published: May 2021

Abstract
The article discusses conceptual approaches to the use of technologies and services for creating a common digital space for scientific and educational activities. The description of the basic processes is given taking into account the application of new approaches. The possibilities of the cognitive model of a participant in the scientific and educational process are considered.
New information technologies in the estimation of the third type systems
Authors: Grigorenko V V , Filatov M A , Nazina N B , Chempalova L S , Tretyakov S A 
Published: May 2021

Abstract
In the middle of the 20th century, W. Weaver, one of the founders of information theory, propose a hypothesis about special systems of the third type (living systems). In the article, W. Weaver directly points out the inability to describe living systems within the framework of determinism and stochastics. However, no one even tried to study the third type systems from these positions over the past 70 years. 20 years ago, we proved the Eskov-Zinchenko effect in the form of a lack of statistical stability of samples of human movement parameters. A new mathematical apparatus is now proposed to accurately describe the behavior of such systems. It is based on an analogue of Heisenberg’s uncertainty principle.
Environmental monitoring of water quality in the interstate Ural river
Authors: Yessenamanova M S , Kulzhanova G , Tlepbergenova A E , Yessenamanova Zh S , Batyrbayeva G 
Published: May 2021

Abstract
This article analyzes the content of biological oxygen demand, chemical oxygen demand, heavy metals using the example of the content of copper and zinc and oil products in the Ural River, which is transboundary and runs along Bashkiria, Chelyabinsk and Orenburg regions, as well as in The Republic of Kazakhstan, West Kazakhstan and Atyrau regions. An excess is noted for all indicators. So the content of biological oxygen demand exceeds from 2 to 15 maximum permissible concentration, the content of chemical oxygen demand on the territory of the Russian territory exceeds about 2 maximum permissible concentration. The content of heavy metals copper and zinc ranges from 1.5 to 6.3 maximum permissible concentration, while the highest values are typical for the Kazakhstani territory, which is a consequence of the accumulation received from the Russian territory. The content of petroleum products exceeds for the most part up to 2 maximum permissible concentration and more, only in the territory of the village of Makhambet and the village of Bogdanovskoye is it lower than the maximum permissible concentration.
Features of the synthesis of information and measurement systems using machine learning for conducting of environmental monitoring
Authors: Avdeev Yu M , Pakhomova A I , Zolkin A L , Munister V D , Kalyakina V M 
Published: May 2021

Abstract
The article is dedicated to the consideration of new methods for the synthesis of digital environmental monitoring systems, inclusive to the analysis through the methodology of machine learning. The role of circuit components proposed for implementation is considered. Attention is paid to the specifics of the analysis of already measured data and to the memory device of information-measuring systems. The importance of using MS-triggers and logistic regression in analysis of the stability of sensors is justified.
Model of spatial microeconomic samples for assessing of distributed industrial networks performance
Authors: Poskryakov I A , Munister V D , Zolkin A L , Kuzmin M A , Zavialova N F 
Published: May 2021

Abstract
The article is dedicated to the consideration of the basic principles of cybernetics and to definition of a discrete model of microeconomic equivalents of samples of longitudinal (panel) data. The efficiency of the work of elements of industrial production (which have the properties of emergence in relation to each other) is substantiated. The author’s panel model of metric data for the economic subsystems of the enterprise is presented.
Modelling of the reliability of the protection system against voltage dips
Authors: Gladkikh T D 
Published: May 2021

Abstract
Oil and gas production facilities place high demands on the reliability of the power supply system. In the event of a failure of the electrical networks of such consumers, significant economic damage occurs and there is a high probability of threat to the environment. To improve the reliability of oilfield electrical networks, it is necessary to introduce automated systems to eliminate violations in power supply modes. Automatic control systems for operating modes of electrical networks must have high reliability indicators. The paper proposes to assess the reliability of the automatic control system using the event tree method. The development of an event tree makes it possible to evaluate the efficiency of the automatic control systems, to identify elements and control algorithms that do not meet the reliability requirements.