bluuebunny/crossref_metadata_2025 huggingface dataset:
A Bibliometric Analysis of Drought Indices, Risk, and Forecast as Components of Drought Early Warning Systems
Authors: Yildirim Gokhan , Rahman Ataur , Singh Vijay
Published: January 2022

In this study, we apply a bibliometric analysis to characterize publication data on droughts, mainly focusing on drought indices (DIs), drought risk (DR), and drought forecast (DF). Data on publications on these selected topics were obtained through the Scopus database, covering the period from 1963 to June 2021. The DI-related publications, based on meteorological, soil moisture, hydrological, remote sensing, and composite/modeled Dis, accounted for 57%, 8%, 4%, 29%, and 2% of the scientific sources, respectively. DI-related studies showed a notable increase since the 1990s, due perhaps to a higher number of major droughts during the last three decades. It was found that USA and China were the two leading countries in terms of publication count and academic influence on the DI, DR, and DF studies. A network analysis of the country of residence of co-authors on DR and DF research highlighted the top three countries, which were the USA, China, and the United Kingdom. The most productive journal for the DI studies was found to be the International Journal of Climatology, whereas Natural Hazards was identified as the first-ranked journal for the DR and DF studies. In relation to individual researchers, Singh VP from the USA was found to be the most prolific author, having the greatest academic influence on DF study, whereas Zhang Q from China was identified as the most productive author on DR study. This bibliometric analysis reveals that further research is needed on droughts in the areas of risk management, water management, and drought management. This review maps trends of previous research in drought science, covering several important aspects, such as drought indices, geographic regions, authors and their collaboration paths, and sub-topics of interest. This article is expected to serve as an index of the current state of knowledge on drought warning systems and as guidance for future research needs.
DIAGNOSTICS OF FRONTAL STRUCTURES BASED ON MECHATRONIC SYSTEMS
Authors: GORIN A.V. , USIKOVA I.G. , TOKMAKOV N.V. , RODICHEVA I.V.
Published: January 2022

The article considers the use of a mechatronic system for monitoring and diagnostics of frontal structures of buildings. Structural and functional diagram of the mechatronic control and diagnostics system of the frontal structure is presented. Calculation of frontal structure element based on finite element method is considered. The results of the theoretical calculation of the thermal flow of the frontal structure are presented. Recommendations are given on the use of the finite element method for calculating frontal structures according to various parameters.
ASSESSMENT OF THE IMPACT OF IMPROVING THE QUALITY OF MANAGEMENTTHERMAL AND HYDRAULIC MODES ON THE EFFICIENCY OF COMBINED SYSTEM DISTRICT HEATING SYSTEM
Authors: PETROV S.P. , PODMASTERYEV K.V. , MARKIN N.I. , MARKOV V.V. , NIKITENKO O.S.
Published: January 2022

The issues of assessing the impact of improving the quality of thermal and hydraulic control on the efficiency of a combined district heating system are considered.
RESONANCES AND ANTI-RESONANCES OF FORCES AND VELOCITIES
Authors: POPOV I.P.
Published: January 2022

To study resonance and near-resonance phenomena, a symbolic (complex) method was used, which makes it possible to significantly increase productivity, simplify and formalize mathematical transformations. Parallel and sequential connections of elements of a mechanical system with a source of force or a source of speed as a source of external mechanical harmonic action are considered. Four modes are described - resonances and antiresonances of forces and velocities. The use of the symbolic (complex) method has significantly simplified the study of resonance and near-resonance phenomena, in particular, it has made it possible to deeply unify and formalize the consideration of various mechanical systems. The cumbersome and time-consuming operations associated with the preparation and solution of differential equations have been replaced by simple algebraic transformations. The method is based on the mechanical analogue of Ohm's law in a complex representation and the concept of mechanical reactance, resistance, impedance, susceptance, conductance and admittance.
CALCULATION OF THE VARIABILITY OF THE VARIABLE FACTORS OF THE MATHEMATICAL MODEL OF FLATNESS DEVIATION IN FACE MILLING OF HIGH-CARBON HARDENED STEEL
Authors: MAKAROV V.F. , SEDININ I.N.
Published: January 2022

The enterprise carried out theoretical and experimental studies of face milling of hardened steel by the method of experiment planning. One of the tasks was to determine the deviation from the flatness of the processed surface of the samples and the construction of graphs and surfaces of the function of the mathematical model. For the tests, a milling machine and measuring equipment of increased accuracy, as well as a cutting tool with carbide plates, were used. As a result, a full factorial experiment was carried out, as independent variables were taken: cutting speed, feed per tooth and depth of cut. When determining the coefficients of the polynomial equation, a central compositional orthogonal design of the second order was used. Regression analysis was performed using Microsoft Excel, Wolfram Alpha and Statistica programs and a mathematical model of deviation from flatness was found, and the results of calculations were entered into the final table. On the basis of a mathematical model, in Microsoft Excel and Mathcad programs, graphs and hypersurfaces of a function are built for various interactions of variables. Significant variables were calculated for one-factorial and two-factorial influence on the response function.
CONCEPT OF A MECHATRONIC INSTALLATION FOR RESEARCHING THE RHEOLOGICAL PROPERTIES OF PHYSIOLOGICAL FLUIDS
Authors: KORNAEVA E.P. , KORNAEV A.V. , STEBAKOV I.N. , POPOV S.G. , STAVTSEV D.D. , DREMIN V.V.
Published: January 2022

The properties of physiological fluids, blood primarily, contain important information about the state of a body. This article deals with the development of a new portable device of inertial viscometer for the physiological fluids. Based on the analysis of mathematical and simulation models of viscous media flows in capillaries, recommendations for the choice of design parameters are formulated. Processing the data of a video capillaroscopy for the intralipid flow under conditions close to the conditions for measuring blood viscosity showed the possibility of using the laser speckle contrast imaging method to determine the velocity profile over the channel thickness. The results obtained have created sufficient grounds for the design of a mechatronic test rig and its information-measuring system.
ESTIMATION OF THE QUALITY OF FILM ANTIFRICTION COATING USING A REGRESSION MODEL
Authors: GRYADUNOVA E.N. , RODICHEV A.Yu. , TOKMAKOVA М.А.
Published: January 2022

The article presents the results of processing experimental studies of the quality of a film antifriction coating applied to a sliding bearing. A diagram of the forces acting on a film particle during the application of an antifriction coating is shown. A method for processing experimental data based on regression analysis is described. Several independent factors have been identified that affect the quality of the film antifriction coating. Recommendations are given for the rational change of the distance from the nozzle to the surface of the part, the angle of spraying and the rotation speed of the part that influenced the adhesion of the film antifriction coating to the workpiece.
STRESS-STRAIN STATE AXISYMMETRICAL DIE
Authors: LUZGIN L.A. , GAZIZOV H.SH. , VALIEV R.SH.
Published: January 2022

The ways to increase strength and durability of axisymmetric pre-stressed multilayer cylinders were studied in this article. Cold forging dies for extrusion of complex shape parts is an example of such equipment. The process of complex shape part cold extrusion was modeled; the internal contact pressure along the interface between die and forged part is studied. In the result, the design procedure and specialized software were developed to allow automated design of complex multilayer equipment and structures. Several approaches and recommendations are proposed for multilayer cylinders design in order to increase it durability
CHANGES IN THE PHYSICAL AND CHEMICAL PROPERTIES OF NANOCERAMIC COMPOSITIONS BASED ON PYROPHYLLITE-CONTAINING RAW MATERIALS
Authors: MUKHAMEDZYANOVA A.A. , SHAYAKHMETOV U.Sh. , AZAUGILDINA N.Kh. , IKHSANOV I.A.
Published: January 2022

The use of the pyrophyllite mineral in the production of ceramics and refractories is determined by a number of valuable technological properties: good machinability, high chemical resistance, low content of alkali metal oxides and coloring oxides, use as a thinning additive, etc. The results of a study of physico-chemical processes occurring when heating compositions based on pyrophyllite-containing raw materials by various instrumental methods are presented. The temperatures of dehydration of diaspore, sericite and kaolinite, the formation of mullite from kaolinite and the transition of γ→α-aluminum oxide are determined. The temperatures of the beginning of deformation of ceramic compositions based on pyrophyllite-containing raw materials were determined when the samples were heated to 750°C and 1300°C. The coefficient of expansion of a ceramic material based on pyrophyllite-containing raw materials is calculated. As a result, an annealing-free technology of thin-walled reinforced tubular products using a phosphate binder was created.
DEVELOPMENT OF A MATHEMATICAL MODEL OF A CONTROLLED INJECTION MOLDING PROCESS WITH CRYSTALLIZATION UNDER PRESSURE
Authors: DENISOV M.S.
Published: January 2022

Various types of impacts, which in terms of the process approach are aimed at creating value, at giving metal products a complex of higher consumer properties, change the value of thermodynamic parameters. These include temperature, pressure, enthalpy, entropy, Gibbs energy, etc. Processing processes are associated with energy costs, with movement, and therefore control problems can be represented as problems of dynamics, solved using differential equations. The paper proposes a mathematical model of the casting process with crystallization under pressure, where the pressure acts as a factor that can be varied widely at different stages of the process. The controlled process model is based on phase coordinates. The evolution of the state of the system under consideration is represented by differential equations. A block diagram of the control system has been developed.
MODELING OF DEFORMATION FOR THE POLYMER ACETABULAR LINER DURING MATING WITH THE HEAD OF A TOTAL HIP REPLACEMENT
Authors: PAKHALIUK V.I. , POLIAKOV A.M.
Published: January 2022

In this work, we propose a design of the acetabular component (liner) of the spherical joint of a total hip joint replacement (THR), which simplifies its design with an increase in the degree of fixation of the femoral head in it, which reduces the likelihood of its dislocation from the liner, leading to obvious revision intervention. At the same time, a fairly large range of joint mobility is also preserved. To ensure the reliability of mating, the opening of the liner through which the head is installed, it is desirable to be located as far as possible from its diametrical plane. However, in such cases, it is necessary to ensure sufficiently large deformations of the liner during the installation of the head. The work evaluates the efforts applied to the head required for its mating with the liner; the results of numerical simulation of elastic deformation of a liner with a groove during the installation of the head are presented.
A SET OF SOFTWARE AND HARDWARE TOOLS FOR AUTOMATING SEWING PRODUCTION PROCESSES
Authors: RUSSKIN A.V.
Published: January 2022

The article describes an approach to creating an automated software and hardware complex for monitoring and processing data to perform the functions of planning and managing production processes in the enterprise of the clothing industry. Data collection from automated workplaces, taking into account the individual characteristics of the working activity of the companys employees, centralized data processing, allow you to monitor the functioning of the enterprise in real time and to perform forecasting of terms and cost of manufacturing new types of products.
INFORMATION AND MEASUREMENT SYSTEM FOR MONITORING THE RESERVE TIME OF CONSCIOUSNESS PRESERVATION BY AIRCRAFT PASSENGERS IN HIGH–ALTITUDE FLIGHT
Authors: MARKOV N.A.
Published: January 2022

The article considers the information and measurement system for monitoring the reserve time of consciousness retention by aircraft passengers in high–altitude flight, which is based on the indicator of the reserve time of consciousness retention by a person in high–altitude flight, which provides the calculation of the reserve time estimate in real time.
DETECTION OF OIL PRODUCT LEAKS AT THE OBJECTS OF THE AGRO–INDUSTRIAL COMPLEX ON THE BASIS OF PHASOMETRIC GEOELECTRIC SYSTEMS
Authors: SURZHIK D.I. , KUZICHKIN O.R. , VASILIEV G.S. , BAKNIN M.D. , PANKINA E.S.
Published: January 2022

The article discusses an approach to the detection of leaks of oil products at the facilities of the agro–industrial complex based on the results of processing phase images of geodynamic processes during local geoecological monitoring. It is shown that the modern agro–industrial complex is a combination of several different sectors of the economy, the quality and safety of products of which for consumers largely depends on the effectiveness of solving the problem of maintaining the ecological safety of the lands used, as well as monitoring their condition, early detection and prevention of possible pollution, including include emergency leaks of oil products from on–site storage and processing facilities. To monitor and control the state of these objects, it is proposed to use geoecological monitoring based on the phase–metric geoelectric control method, which has increased sensitivity and noise immunity compared to amplitude methods. On its basis, a structural diagram and functional model of a two–channel detector of geodynamic events (with two solvers and a three–alternative hypothesis for each) have been developed, the efficiency of which is confirmed by the results of experimental studies using a specially developed monitoring system and a mock–up model of an areal object of the fuel and energy complex.
DEVELOPMENT OF EFFICIENCY CRITERION FOR OPTIMIZING THE STRUCTURES OF MACHINE UNITS
Authors: KHARCHENKO A.O. , NOVOSELOV Yu.K. , KHARCHENKO A.A.
Published: January 2022

The article discusses the process of developing an efficiency criterion when solving problems of synthesizing the structures of machine modules. When solving problems of the synthesis of structures at the initial stages, it is recommended to apply the method of morphological analysis based on the use of the morphology of objects and allowing to organize and systematically analyze the space of their changes. Along with the actually possible combi–nations of characteristics, the method gives a large number of incompatible options, an objective assessment of the effectiveness of each of which is difficult. In order to evaluate the preferred module option for automated design, it is necessary to develop an optimality criterion that takes into account the probabilities of trouble–free and commis–sion–free operation of the technological system. A particular objective optimization function is determined, to evaluate the optimality of solutions when choosing from comparable options, an integral higher level criterion is proposed, which explicitly associates the total annual efficiency of equipment operation when meeting the require–ments for product quality with total costs for its creation and operation. Describes the method of selection of technological elements of equipment and the approach to the evaluation of the preferred option module with computer–aided design.
TURNING MODEL FOR SHAPED SURFACES WITH OPPOSITE CUTTERS
Authors: VOZHZHOV A.A.
Published: January 2022

The analysis of the technological scheme of double–cutter shaped turning with opposed placement of cutters is carried out. An unstable form of oscillations of the cutter – workpiece system during turning is considered. Dependences are presented that allow estimating the magnitude of oscillations during processing and a number of experimental studies that confirm theoretical assumptions.
EVALUATION OF THERMAL EFFICIENCY WHEN DESIGNING HEAT–EXCHANGING DEVICES OF SYSTEMS FOR PROVIDING THERMAL REGIME OF POWER INSTALLATIONS
Authors: ABLAEV A.R. , ABLAEV R.R.
Published: January 2022

A method is given for assessing the thermal efficiency of heat exchangers using a computational experiment based on a refined model of thermal and hydrodynamic calculation.
TYPICAL CASES OF SHOCK LOADING OF VIBRATION–PROOF SYSTEMS OF AGGREGATES AND COMPONENTS OF VEHICLES
Authors: LAZUTKIN G.V. , BOYAROV K.V. , ANTIPOV V.A. , BERESNEV V.L. , NAZAROVA N.V.
Published: January 2022

Using the previously developed mathematical model of a vibration isolator with an elastic–hysteresis element made of metal–rubber material and the obtained approximate solutions of the nonlinear differential equation of the aircraft motion based on the Bubnov–Galerkin methods and a small parameter, the dependences for constructing shock–insulating characteristics for rectangular and semi–sinusoidal pulses are derived. It is shown that the error of these solutions in comparison with the exact solutions for some elastic characteristics, in particular, with a significant nonlinearity in the form of a cubic parabola, does not exceed 3.5%.
INVESTIGATION OF NEAR–RESONANT MODES OF FORCED VIBRATIONS OF VIBRATION–PROOF SYSTEMS WITH STRUCTURAL DAMPING UNDER HARMONIC EXCITATION
Authors: LAZUTKIN G.V. , DAVYDOV D.P. , BOYAROV K.V. , ANTIPOV V.A. , DOVGIY V.A.
Published: January 2022

Using the previously developed mathematical model of a vibration isolator with an elastic – hysteresis element made of metal–rubber material and on the basis of the Bubnov–Galerkin method, the solution of the equation of forced vibrations of vibration protection systems (VS) under harmonic excitation is obtained. The obtained theoretical results are used to construct generalized dynamic characteristics of vibration isolators with structural damping, in particular, vibration isolators with an elastic–hysteresis element made of MR material. As a result, a simple and fairly general procedure for calculating the generalized vibration–isolating characteristics of the aircraft for the case of harmonic linearization is obtained.
ALGORITHM FOR DIVIDING A VOLUME MODEL INTO CURVILINEAR LAYERS FOR 3D PRINTING
Authors: KUTS V.V. , GRECHUKHIN A.N. , OLESHITSKY A.V. , PRIVALOV F.S. , SHCHERBAKOV P.S.
Published: January 2022

The article is devoted to the development of the theoretical foundations of the additive shaping of products using the FDM technology. The analysis is carried out by research in this area. It was revealed that the formation of products using the additive FDM technology has significant drawbacks. They are primarily associated with the anisotropy of the physical and mechanical properties of products in the longitudinal and transverse directions. This affects the level of performance of these products. One of the directions for solving the problem of the formation of anisotropy, as well as its control, is the formation of the structure of the product by spatial curvilinear layers. Algorithms for dividing a digital model into curvilinear spatial layers for 3–D printing are proposed here, namely, the layers are divided into cylindrical, conical, spherical. This will provide the formation of products using the FDM technology with spatial curved layers. The results represent the implementation of the developed algorithms for dividing a digital model into spatial curved layers for 3D printing. The application of the proposed algorithms will improve the physicochemical properties of products by forming spatial curvilinear layers.
INFLUENCE OF NUMBER OF THE HYDROSTATIC BEARINGS WITH AN INCOMPLETE RANGE ANGLE POCKETS ON STATIC AND DYNAMIC CHARACTERISTICS
Authors: VASILIEV A.A.
Published: January 2022

Comparative analysis of the design of the working surface of the hydrostatic bearings with an incomplete range angle for the static and dynamic characteristics of the bearings. Rectangular pockets with two variants of the number of pockets: two, three and four were considered as constructive designs. The following were considered as static characteristics: load capacity, power losses for pumping and flow rate of the working fluid. As dynamic characteristics were considered: stiffness and damping coefficients. For the models, mathematical calculation models were used based on the joint solution of the basic equations of hydrodynamics: the Reynolds equation, the heat balance equation, the flow rate equation and a dynamic model developed for the "flexible rotor – hydrostatic bearings with an incomplete range angle" scheme, including the calculation of dynamic coefficients and the definition stable support work.
DETERMINING LOAD DISTRIBUTION UNEVENNESS RATIO BETWEEN ROWS OF ROLLING BODIES IN HARMONIC GEAR WITH INTERMEDIATE ROLLING BODIES
Authors: ABDULIN R.R. , PODSHIBNEV V.A. , SAMSONOVICH S.L.
Published: January 2022

The work is devoted to the topical problem of designing rotary actuators based on harmonic gears with intermediate rolling elements (HGR). The theoretical dependences are presented, which make it possible to determine unevenness ratio of the load distribution between the rows of rolling elements in the HGRE. The results of service life tests of the HGRE and modeling by the finite element method, characterizing the uneven distribution of the load between the rows of rolling elements, are given. A refined dependence of the calculation of the diameter of the rolling bodies in the HRGE is proposed, which makes it possible to consider the uneven distribution of the load between the rows of rolling elements.
VARIABLE CLEARANCE SLIDE BEARING: CALCULATION OF HYDRODYNAMIC FORCES
Authors: KORNAEV A.V. , KAZAKOV Yu.N.
Published: January 2022

The article is devoted to the development and verification of a mathematical model of a tapered bearing with axial lubricant supply. A feature of the bearing design is the dependence of the average clearance on the axial displacement of the rotor, which makes it possible to use simple actuators to control the properties of rigidity and damping of the lubricant layer. The model is based on a generalization of the Reynolds equation by integrating simplified equations of motion and continuity in cylindrical coordinates. Numerical solution of the generalized Reynolds equation by the finite difference method showed good agreement with the results of other authors
CONTROLLED DRY FRICTION DAMPER AS AN ELEMENT OF A MECHATRONIC SYSTEM
Authors: SAVIN L.A. , KOZYREV D.L. , GORIN A.V.
Published: January 2022

The article presents a brief analysis of controlled dampers. The main types of controlled dry friction dampers are presented. Their classification of power signals in dry friction dampers is given. A functional diagram of a mechatronic controlled dry friction damper is presented. An algorithm for the operation of a dry friction mechatronic damper is described. Conclusions are drawn and recommendations are given on the formation of the algorithm for the operation of the friction damper.
STUDY OF THE CHARACTERISTICS OF THE FLAP BEARING WITH FILM ANTI–FRICTION COATING
Authors: RODICHEV A.Yu. , POLYAKOV R.N. , GORIN A.V. , ТOKMAKOVA М.А.
Published: January 2022

The article contains a brief analysis of the applied film antifriction coatings used in mechanical engineering. The design diagram of a petal bearing with an antifriction film coating is presented. The mathematical apparatus for modeling the operating parameters of a petal bearing with an antifriction film coating is shown. The results of calculating some operating modes and parameters of a petal bearing with an antifriction film coating are presented. Recommendations are given for the further use of a petal bearing with an antifriction film coating.
A VARIANT OF THE INVERSE PROBLEM OF BEAM DYNAMICS BASED ON PARSNIPS
Authors: PODDUBNY А.A. , GORDON V.A. , POTURAEVA T.V. , LEONOV D.S.
Published: January 2022

The paper presents a mathematical model of a dynamic process initiated in a constructively nonlinear system – a statically loaded beam on an elastic Pasternak foundation – by the sudden formation of a defect in the form of subsidence of a part of the foundation. The equations of static deflection, natural and forced vibrations are presented in matrix form using multicomponent state vectors and matrices of the influence of the initial parameters on the state of the beam sections. It is shown that a certain combination of mechanical characteristics of the «beam – two–parameter foundation» system and parameters of damage to the foundation (localization and dimensions) leads to forced nonharmonic vibrations with a frequency expressed in fractions of the frequency of a free or fully supported beam. The values of the increments of internal efforts, caused by the factor of suddenness of the formation of damage, have been determined.
SELECTION OF KEY CONTROL ZONES IN THE GEOTECHNICAL MONITORING SYSTEM
Authors: PANKINA E.S. , DOROFEEV N.V.
Published: January 2022

In this paper, we propose an algorithm for identifying key zones of geotechnical monitoring based on the data of an information and analytical system. The proposed algorithm is based on the analysis of the stability of individual sections of the geotechnical system, group stability using a neural network approach and a basic model. The training sample is formed on the basis of the geotechnical system model and a priori information. To isolate homogeneous reactions of a geotechnical system at different values of its parameters, the data clustering procedure is used. The correction of the permissible limits of the output of the controlled parameters is proposed to be carried out taking into account the results of the bifurcation analysis. The practical verification of the proposed algorithm was carried out on the monitoring data of a three–story building. The results obtained during the processing of the data of the information and analytical system of geotechnical monitoring by the proposed algorithm are consistent with the measurement and modeling data.
SOME PROBLEMS OF OPTIMAL MANAGEMENT OF PURPOSEFUL ACTIVITY OF AN INDUSTRIAL ENTERPRISE IN THE FIELD OF QUALITY
Authors: IVAKHNENKO A.G. , ANIKEEVA O.V.
Published: January 2022

A model of dynamics for targeted quality management is presented. A feature of the very formulation of the optimization problem associated with the definition of boundary conditions is revealed. An integral optimality criterion is proposed, which includes taking into account the costs associated with deviations of each quality goal during the planned time period and the costs associated with the implementation of control actions to achieve the set goals. The results of modeling when solving a problem with fixed boundaries and a free boundary on the example of an industrial enterprise are presented. The features of solutions to these problems are revealed, taking into account the nature of changes in the quality goals themselves and control actions. The comparison of these solutions with target management with step–by–step control action is given, which allows the management to choose those that most correspond to the management style, as well as the existing or emerging culture of the enterprise.
METHODOLOGY AND MODEL FOR DETERMINING THE RATIONAL NOMENCLATURE OF MEASURING INSTRUMENTS FOR THE IMPLEMENTATION OF METROLOGICAL SUPPORT OF MODERN DIGITAL SYSTEMS, NETWORKS AND COMMUNICATION COMPLEXES
Authors: DAVYDOVA N.V. , IVANOV Y.N. , REMIZOV Y.A. , IVANOV V.O.
Published: January 2022

The article presents a methodological approach to solving the problem of determining the nomenclature and composition of measuring instruments for the implementation of metrological support of modern digital systems, networks and complexes. A functional model of the choice of measuring instruments is proposed, particular selection criteria are formed and an expression is obtained for determining a generalized indicator of the effectiveness of measuring instruments, according to the values of which measuring instruments can be ranked and, accordingly, a rational nomenclature can be formed.
MOVEMENT PLANNING OF MODULES OF AN ACTIVE TRANSFEMORAL PROSTHESIS USING A MODIFIED MINIMUM TORQUE CHANGE MODEL
Authors: BUGAYOV P.A. , POLIAKOV A.M. , PAKHALIUK V.I.
Published: January 2022

It is known that limb movements during human motor activity are very stereotyped, which suggests that the effects of Bernsteins motor synergies are realized under the influence of the central nervous system. In this regard, a hypothesis was proposed about the possibility of synthesizing the so–called synergetic systems for controlling artificial limbs in order to eliminate the problem of their motor redundancy. One of the ways to synthesize such systems is based on the use of experimentally substantiated models that allow optimizing the movements of limb elements or their artificial analogs – prostheses. It was previously shown that the minimum jerk model, the minimum torque change model, and a number of other models, under boundary conditions describing a fixed position in space of the final target point of motion, are quite effective for modeling biosimilar movements of upper limbs. However, such models do not allow taking into account the possible change in the position of the target point in space during the movement. In this work, we evaluated the results of planning the movements of active transfemoral prosthesis at a non–fixed location in the space of the end target point using a modified model of the least change in torques. The use of such a model can be effective, for example, when an obstacle suddenly appears in the path of a disabled person and his intention is to bypass this obstacle. The results of numerical experiments indicate that the modified model of the smallest change in torques makes it possible to plan biosimilar movements of the lower extremities and their artificial analogs – prostheses.
PROBLEMS OF THE DEVELOPMENT OF SOLID-LIQUID METAL PRESSURE CASTING IN RUSSIA
Authors: SEMENOV A.B.
Published: January 2022

The methods of powder and granular metallurgy are rapidly improving, granulation and spheroidization of solid phase particles is carried out “in–situ” at the stage of alloy preparation, which precedes the casting stage, and on this basis, a new generation of technologies is born and developed. dubbed Thixo – (casting, molding, forming) and PowderInjectionMolding (РIM (МIM, СIM)) technologies. All of the above technologies are united by the term Semi–Solid Processing (SSP), and the mandatory code prefixes Semi–Solid Metal (SSM) and MetalInjectionMolding (MIM) have appeared in the designations of alloys prepared for processing in a solid–liquid state.
DEVELOPMENT OF LIQUID BREATHING TECHNOLOGIES TO ENSURE LONG–TERM DEEP–SEA RESEARCH
Authors: GAYNULLINA Ya.N. , PASHKOV E.V. , KALININ M.I. , POLIVTSEV V.P.
Published: January 2022

The paper discusses the features of new liquid respiration technologies for specific tasks of deep–sea research, in particular, a long stay of researchers in an underwater autonomous module.
THEORETICAL JUSTIFICATION OF COATING ADHESION DURING GAS–THERMAL SPRAYING
Authors: KUZNETSOV YU.A. , KRAVCHENKO I.N. , SHAMRIN A.V. , PANKOV G.B. , SELEMENEVA E.M.
Published: January 2022

The article provides a brief overview of modern methods of thermal spraying. Particular attention is paid to high–speed flame spraying. The theoretical substantiation of the adhesion of coatings formed on machine parts using the methods of thermal spraying is presented.
JUSTIFICATION OF THE DESIGN SEQUENCE COMBINED SUPPORTS WITH VARIABLE CHARACTERISTICS
Authors: POLYAKOV R.N. , VNUKOV A.V. , TOKMAKOVA M.A. , RODICHEVA I.V.
Published: January 2022

The paper summarizes the state of the art of mechatronic systems with non–contact seals. There are two types of non–contact sealing devices for rotary bearing assemblies. A schematic diagram of the connection of a non–contact sealing device on a test bench is proposed. Shown is the information and measurement system of the experimental stand for the study of contactless sealing devices. Recommendations are given for the further use of non–contact sealing devices in the design of rotary support units.
APPLICATION OF THE BARKHAUSEN EFFECT IN MECHATRONIC QUALITY CONTROL SYSTEMS OF ELECTRICAL STEEL
Authors: TSYBRIY I.K. , IGNATENKO V.I. , VYALIKOV I.L. , RODICHEV A.Y.
Published: January 2022

Residual magnetic anisotropy of isotropic electrical steel adversely affects the performance of electrical machines. Mechanical stresses and deformations arising during the manufacture of parts lead to an increase in the anisotropy of the magnetic properties. The aim of this work is to develop a method that makes it possible to assess the degree of residual magnetic anisotropy in finished products. For this, the paper considers the possibility of using the parameters of the Barkhausen effect (EB), reflecting the dynamics of the magnetic structure of the material in alternating magnetic fields. As samples for the study, a set of ready–made stamped plates of the core of a toothed rotor of an electric machine was used. The microstructure of the samples was investigated using a Neopfot–21 metallographic microscope. The studies of the magnetic structure were carried out using the original Barkhausen device for recording magnetic noise, which includes a magnetic noise sensor, a system of amplifying–converting units, and a digital processing unit for measuring information. The results of measurements of the area of the envelope around the circumference of the average diameter and along the teeth of the rotor plate are given, which make it possible to estimate the level of residual anisotropy of isotropic steel by scanning the surface of the tooth rotor plates with a magnetic noise sensor. The data obtained can serve as the basis for the development of a method for controlling the level of magnetic anisotropy of isotropic electrical steels induced in finished products as a result of mechanical processing.
THE ANALYSIS OF THE TRAJECTORIES OF MOTION OF HIGH–SPEED ROTOR IN THE CONICAL LIQUID FRICTION BEARINGS WITH MULTI–LAYER STEEL DAMPERS
Authors: KORNEEV А.YU. , SYTIN A.V. , MISHCHENKO E.V.
Published: January 2022

The calculation procedure of the trajectories of motion of high–speed rotor in the conical liquid friction bearings with multi–layer steel dampers is offered. The equations set of motion is written for two–bearing rotor in the conical liquid friction bearings with multi–layer steel dampers. The results are illustrated by the plots of trajectories for the conical bearings with oil lubricant.
Analisis Peranan Literasi Teknologi dan Informasi Sebagai Variabel Moderating Dalam Hubungan Openness To Expereience, Conscientiousness, Agreeableness, Serta Neuroticism Dengan Perencanaan Karier Pada Generasi Z di Universitas Dharma Andalas
Authors: Hastini Lasti Yossi , Chairoel Lucy , Yan Fitri Mellyna Eka
Published: January 2022

Perencanaan Karier pada Generasi Z yang masih berada di bangku perkuliahan dan sedang bersiap menghadapi dunia kerja perlu diteliti. Perencanaan karier dapat ditinjau dari pendekatan kepribadian diantaranya adalah Openness to Experience, Conscientiousness, Agreeableness, dan Neuroticism. Selain itu Perencanaan Karier juga dapat ditinjau dari kemampuan yang dimiliki Generasi Z untuk memasuki dunia kerja salah satunya yaitu Literasi Teknologi dan Informasi. Penelitian ini bertujuan untuk memberikan bukti empiris mengenai peranan Literasi Teknologi dan Informasi sebagai variabel moderasi dalam hubungan masing-masing dari  keempat variabel kepribadian tadi dengan Perencanaan Karier. Penelitian ini dilakukan pada 243 orang mahasiswa aktif Universitas Dharma Andalas dan merupakan penelitian dengan desain  kuantitatif korelasional. Data dianalisis dengan aplikasi SPSS. Hasil penelitian memperlihatkan Literasi Teknologi dan Informasi memiliki peran moderasi yang berbeda-beda untuk masing-masing hubungan Personality dengan Perencanaan Karier. Hanya pada  hubungan Neuroticism dengan Perencanaan Karier, Literasi Teknologi dan Informasi yang tidak berperan sebagai variabel moderasi.

Kata Kunci: Literasi Teknologi dan Informasi; Moderating; Perencanaan Karier; Openness to Experience; Conscientiousness;  Agreeableness; Neuroticism
Pengaruh Dimensi Service Quality Terhadap Kepuasan Pasien di Bagian Rawat Inap Rumah Sakit Immanuel Bandung
Authors: Iskandar Albert , Februadi Agustinus
Published: January 2022

Penelitian ini bertujuan untuk mengetahui pengaruh dari dimensi-dimensi dalam Service Quality Parasuraman terhadap Kepuasan Pasien di Bagian Rawat Inap Rumah Sakit Immanuel. Populasi penelitian ini adalah pengguna jasa rawat inap di Rumah Sakit Immanuel, sedangkan sampelnya adalah pengguna jasa rawat inap di rumah sakit tersebut pada periode April – Mei 2021. Metode pengambilan sampel dengan menggunaan Purposive Sampling dengan total sampel  sebanyak 150 sampel. Teknik analisis datanya menggunakan PLS-SEM yang dibantu oleh Software SmartPLS versi 3.2.9. Hasil penelitian menunjukan bahwa dimensi yang paling berpengaruh terhadap Kepuasan Pelanggan di Bagian Rawat Inap adalah dimensi Empathy, sedangkan dimensi service quality lainnya tidak.

Kata Kunci: Mutu Layanan, Kepuasan Pelanggan, Structural Equation Modelling, Analisis Jalur
Analysis of Consumer Behavior on Buying Decision at the Online Shop, Easy Shopping Indonesia
Authors: Jusuf Dewi Indriani
Published: January 2022

Know the effect of the consumer behavior of online shop, Easy Shopping Indonesia on the consumers’ buying decision. The quantitative approach, descriptive and verified design are used. As much as 100 consumers of Essay Shopping in Bandung are selected as respondents using a purposive method. The instrument of data collection is questionnaire. The data analysis used is Structural Equation Modeling based on Partial Least Square (PLS SEM). The research results show that the consumer behavior of Easy Shopping online shop affects the consumer buying decision significantly.  The biggest effect of the consumer behavior dimension on the buying decision variable is a personal factor; the second one is a psychological factor; the third one is a social factor and the fourth one is a cultural factor. The biggest effect of the consumer behavior variable is on the dimension of payment method; then the second one is distribution selection; the third one is on brand selection; the fourth one is on buying time and the last one is on product selection. Those findings are the antecedents of the online buying decision which finally affect the changes of the buying decision from the conventional buying process into the online one.

Key Words : consumer behavior, cultural factors, social factors, personal factors and psychological factors, buying decision, product selection, brand selection, distribution selection, payment method and timing.
Platelet Membrane-Coated Nanocarriers Targeting Plaques to Deliver Anti-CD47 Antibody for Atherosclerotic Therapy
Authors: Chen Liang , Zhou Zhongyi , Hu Cheng , Maitz Manfred F. , Yang Li , Luo Rifang , Wang Yunbing
Published: January 2022

Atherosclerosis, the principle cause of cardiovascular disease (CVD) worldwide, is mainly characterized by the pathological accumulation of diseased vascular cells and apoptotic cellular debris. Atherogenesis is associated with the upregulation of CD47, a key antiphagocytic molecule that is known to render malignant cells resistant to programmed cell removal, or “efferocytosis.” Here, we have developed platelet membrane-coated mesoporous silicon nanoparticles (PMSN) as a drug delivery system to target atherosclerotic plaques with the delivery of an anti-CD47 antibody. Briefly, the cell membrane coat prolonged the circulation of the particles by evading the immune recognition and provided an affinity to plaques and atherosclerotic sites. The anti-CD47 antibody then normalized the clearance of diseased vascular tissue and further ameliorated atherosclerosis by blocking CD47. In an atherosclerosis model established in ApoE
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mice, PMSN encapsulating anti-CD47 antibody delivery significantly promoted the efferocytosis of necrotic cells in plaques. Clearing the necrotic cells greatly reduced the atherosclerotic plaque area and stabilized the plaques reducing the risk of plaque rupture and advanced thrombosis. Overall, this study demonstrated the therapeutic advantages of PMSN encapsulating anti-CD47 antibodies for atherosclerosis therapy, which holds considerable promise as a new targeted drug delivery platform for efficient therapy of atherosclerosis.
Potensi Debit Kali Brondong untuk Pembangkit Listrik Tenaga Mikrohidro di Desa Brondong, Purworejo, Jawa Tengah
Authors: Trisdawati Rani , Purnamawati Dwi Indah , Agoes Wiloso Danis
Published: January 2022

Energi listrik sangat mempengaruhi peradaban manusia, membuat kebutuhan listrik semakin meningkat dari tahun ke tahunnya. Demi menjaga keseimbangan alam dan kehidupan, maka perlu dicari alternatif untuk mengganti bahan bakar dari energi fosil dengan sumber daya alam terbarukan salah satunya yaitu air.  Penelitian ini bertujuan untuk mengetahui besar daya yang dapat dihasilkan dari debit aliran Kali Brondong untuk penerapan mikrohidro. Metode penelitian terbagi menjadi 3 tahap diantaranya tahap pendahuluan yaitu interpretasi peta topografi dan peta pola aliran. Tahap pengumpulan data diantaranya pengukuran debit, tinggi terjunan dan terakhir tahap pengolahan data. Pengukuran debit Kali Brondong di bulan Oktober 2020 diperoleh Q1 sebesar 0,399 m3/s  dan di bulan Februari 2021 Q2 sebesar 1,393 m3/s, head setinggi 4,25 m, jenis turbin yang digunakan yaitu turbin crossflow dan daya listrik yang dapat dihasilkan sebesar 10,801-37,711 kW.
SISTEM JARINGAN PERPIPAAN AIR LIMBAH INDUSTRI KERUPUK KULIT SECARA KOMUNAL (STUDI KASUS PADA SENTRA INDUSTRI KERUPUK KULIT DUSUN CEGOKAN, DESA WONOLELO, KECAMATAN PLERET, KABUPATEN BANTUL)
Authors: Hastutiningrum Sri , Suseno Hadi Prasetyo , Ramadhan Topo Rahmat
Published: January 2022

Dusun Cegokan, Desa Wonolelo, Kecamatan Pleret, Kabupaten Bantul terdapat 11 industri kerupuk kulit (krecek) rumahan yang melakukan produksi hampir setiap hari dengan menghabiskan bahan baku berupa kulit kerbau maupun sapi sebanyak ± 2 kwintal/hari, dan menghasilkan limbah rata-rata sebesar 16,438 m3/hari. Air limbah yang dihasilkan dibuang ke sungai tanpa dilakukan proses pengolahan air limbah. Beberapa industri belum mempunyai sistem perpipaan untuk menyalurkan limbah yang dihasilkan. Tujuan penelitian ini adalah untuk mendapatkan sebuah perencanaan Sistem Perpipaan Air Limbah untuk mengatasi permasalahan tersebut.

Tahap perencanaan sistem perpipaan air limbah meliputi perencanaan sistem perpipaan, pengambilan data kondisi topografi, perhitungan diameter pipa, perhitungan dimensi bak kontrol, merancang gambar peta wilayah, lokasi industri, jalur pipa, serta menghitung rencana anggaran biaya yang diperlukan.

Sistem perpipaan air limbah direncanakan secara gravitasi. Jenis pipa direncanakan pipa PVC tipe AW dengan diameter pipa sambungan 2,5 inci, pipa utama berdiameter 3 inci dengan panjang pipa utama 867 m. Bak kontrol direncanakan berbentuk persegi berjumlah 7 unit bak dengan dimensi meliputi: Bak kontrol untuk 1 industri berjumlah 5 unit (panjang = 0,4 m, lebar = 0,4 m, tinggi = 0,4 m). Bak untuk 2 industri berjumlah 1 unit (panjang = 0,48 m, lebar = 0,48 m, tinggi = 0,48 m). Bak kontrol untuk 4 industri berjumlah 1 unit (panjang = 0,6 m, lebar = 0,6 m, tinggi = 0,6 m).
INVESTIGATION OF THE RELATIONSHIP BETWEEN BIOMETRIC PARAMETERS OF SCOTS PINE JUVENILE SEEDLINGS FROM CONDITIONED SEEDS WHEN ASSESSING THE RESULTS OF REFORESTATION
Authors: Petrishchev E.
Published: January 2022

It is necessary to know the degree of relationship between the biometric parameters of Scots pine juvenile trees grown from conditioned seeds to assess the results of reforestation and the full use of the above algorithms and the development of new ones. Descriptive statistics were calculated for direct and indirect measurements of the biometric characteristics of single Scots pine trees (container-grown 1 + 0.2017 fall plants, seed spectrometric separation) grown from conditioned seeds on a linear plot of the experimental area (51. 49 '45.605200 "; 39. 20 '33.046700"). Direct measurements of the height and diameter of the root collar of seedlings were carried out directly in the field. Indirect Image J-measurements of the biometric parameters of seedlings were carried out on the basis of low-altitude photographs in plan, obtained from a camera mounted on an unmanned aerial vehicle with a four-rotor aerodynamic scheme. Pearson correlation tests were used to quantify the correlation between young tree height with root collar diameter and crown area. Biometric parameters were as follows: seedling height - 53.9 ± 16.2 cm (mean ± standard deviation); diameter of the root collar - 7.7 ± 2.9 mm; endurance coefficient - 73.8 ± 17.8; crown area - (229.111 ± 139.494) ×103 mm2. The height and diameter of the root collar of the seedling strongly positively correlated with each other (r = 0.807 at the p = 0.01 significance level) and with the crown area (r = 0.830 and 0.875, respectively, at the p = 0.01 significance level). The endurance coefficient had an inverse correlation with the diameter of the root collar (r = -0.621 at the significance level of p = 0.01), crown area (r = -0.407 at the significance level p = 0.01) and had no correlation with seedling height.
ASSESSMENT OF THE STATE OF THE ACTIVATED SLUDGE BIOCENOSIS WHEN FUNCTIONING IN AN ENVIRONMENT WITH A HIGH CONTENT OF PROTEIN-LIPID COMPONENT
Authors: Dochkina Yuliya , Plyakina Alina , Korchagin Vladimir
Published: January 2022

The study of the effect of protein-lipid components on the vital functions of activated sludge is promising from the standpoint of developing recommendations for preliminary treatment of highly concentrated effluents entering the biological oxidation line. Objects of research: 1. Active sludge (sludge index 92.0-125.0 cm3/g; mass concentration 4.0-5.5 g/dm3; sedimentation rate 0.5-0.6 cm3/min), 2. Enzymatic dry peptone for bacteriological purposes (13805-76 State Standard). Research methods: FR 1.31.2008.04397, FR 1.31.2008.04398, FR 1.31.2008.04400, microscopic examination of specimens for the purpose of hydrobiological research, laboratory installation, including a container for dosing waste water, aeration tank - mixer, a container for settling excess activated sludge, a compressor. The conditions under which the biooxidation was carried out were as follows: the flow rate into the aeration tank was 0.5 dm3/h, the air consumption for aeration of one aeration tank was 2 dm3/min, the operating mode was continuous, the aeration was fine-bubble, uniform, intensive, the study time was 5 weeks. The study of the effect of the content of the protein-lipid component in the effluents on the main hydrochemical and hydrobiological indicators of the state of the activated sludge biocenosis was carried out using model waste water containing enzymatic peptone C = 500 mg/dm3, C = 1000 mg/dm3, C = 2000 mg/dm3, C = 3000 mg/dm3, C = 4000 mg/dm3. The data obtained indicate an irreversible negative effect on the hydrochemical and hydrobiological parameters of activated sludge biocenosis with a protein-lipid component content of 3000 mg/dm3 and more. However, when the content of the protein-lipid component is less than 1000 mg/dm3, stable dynamics is observed both in hydrochemical and hydrobiological indicators