bluuebunny/crossref_metadata_2025 huggingface dataset:
An elusive ritual or a weave of adverse environmental conditions? From a research on the issue of a small number of sepulchral objects in the Trzciniec culture
Authors: Adamik-Proksa Joanna , Stanek-Tarkowska Jadwiga
Published: September 2021

Over the past dozen years or so, there has been a significant increase in the pace of research on the phenomenon of the Trzciniec cultural circle. This is due to a snowballing increase of the source base, which was obtained as part of modern excavations, currently being conducted in a wide spatial scope (research on routes of planned motorways). A number of synthesis publications have also appeared. Coherent periodizations of development of this cultural circle has been worked out for many regions. It should be noted, however, that these are mainly systematics created on the basis of materials originating from settlements. The number of sepulchral discoveries that have been made so far is incomparably smaller than those of settlement-type objects. The problem of the scale of occurrence of cemeteries seems to be very clear, because in some thoroughly researched areas, no single confirmed grave has yet been discovered. The areas of the San, Vistula and Wisłoka river interfluves, the central Warta region and the sandy areas of the Nida Basin can, among others, be considered as such regions. This article is an attempt to address this problem more broadly. It is also a search for possible explanations the indicated irregularity of an absence of grave sites. The work analyses three aspects of this issue: the degree of excavation reconnaisance of the Trzciniec ecumen, environmental conditions and cultural factors. For the purposes of the analyses, a current list of sepulchral sites of the Trzciniec culture in Poland has been created and all relevant information has been collected. Selected aspects have been illustrated with various types of mapping, specific examples from selected Trzciniec culture sites or groups remote territorially or remote in time, chemical analyses of soil for phosphorus content and radiocarbon facts.
Az idősödő társadalom pénzügyi kontextusa
Authors: Kuti Mónika
Published: September 2021

A TANULMÁNY CÉLJA

A tanulmány célja, hogy az idősödő társadalom hatására megjelenő komplex pénzügyi folyamatokat áttekintse. Az idősödő társadalom jelentős mértékben átformálja a pénzügyek világát, hatással van a kockázati attitűdre, a kockázat-megtérülés viszonyrendszereire, a megtakarítási hajlandóságra, beruházásokra, produktivitásra, fogyasztásra, az eszközárakra, a pénzügyi közvetítőrendszerre, valamint a fiskális egyensúlyra és monetáris politikára egyaránt.

ALKALMAZOTT MÓDSZERTAN

Alkalmazott módszertant tekintve a cikk elsősorban szakirodalom-kutatás, melynek célja, hogy rendszerezze a nemzetközi kutatások fontosabb irányait és kutatási kérdéseit.

LEGFONTOSABB EREDMÉNYEK

A cikk legfontosabb eredménye, hogy rámutat arra, hogy az idősödő társadalom költségvetési egyensúlyproblémákat okoz, a monetáris transzmisszó hatékonyságán módosít, a kockázatmentes befektetések iránti keresletet fokozza, a bankszektorban a bankbetét-állomány növekedéséhez vezet, a nyugdíjbiztosítási rendszert kihívások elé állítja. Az egészségügyi kockázatok miatt az idősek háztartási vagyonportfóliójában az egészségügyi kiadások mint negatív tőke egyre jelentősebb mértékben jelentkeznek, a családon belüli transzferek jelentőségét fokozzák az alacsonyabb jövedelemmel rendelkező társadalmi rétegekben.

GYAKORLATI JAVASLATOK

A kutatási eredmények alapján megfogalmazható gyarkolati javaslatok közé tartozik, hogy a pénzügyi közvetítő rendszer számára fontosak olyan metrikák kialakítása, melyek számszerűsítik a fenti generációs kockázatokat.

Köszönetnyilvánítás: Az „EFOP-3.6.1-16-2016-00004. Átfogó fejlesztések a Pécsi Tudományegyetemen az intelligens szakosodás megvalósítása érdekében” című pályázat támogatásával. (Időskori döntéshozatal projektelem, 11. téma)
Finite Element Analysis to Determine Stiffness, Strength, and Energy Dissipation of U-Shaped Steel Damper under Quasi-Static Loading
Authors: Satria E. , Son L. , Bur M. , Dzul Akbar M.
Published: September 2021

In seismic areas, the application of structural dampers becomes compulsory in the design of buildings. There are various types of dampers, such as viscous elastic dampers, viscous fluid dampers, friction dampers, tune mass dampers, yielding/ metallic dampers, and magnetic dampers. All damper systems are designed to protect structural integrities, control damages, prevent injuries by absorbing earthquake energy, and reduce deformation. This paper is a part of research investigating the behaviour of the U-shaped steel damper (as one type of metallic damper) that can be applied to the buildings in seismic areas. The dampers are used as connections between the roof and supporting structure, with the two general purposes. The first is to control the displacement of roof under an earthquake, and the second is to absorb seismic energy through the plasticity of some parts in dampers. If a strong earthquake occurs, the plasticity will absorb the seismic energy; therefore, heavy damage could be avoided from the roof’s mainframes. In this paper, several models of U-shaped steel dampers are introduced. Several parameters, such as elastic stiffness, maximum strength, and energy dissipation, are determined under two conditions. Firstly, static analysis of the proposed damper under variation of U-steel plate configurations, searching the model with more significant energy dissipation. Secondly, static analysis of the unsymmetrical and symmetrical damper under different loading directions. An in-house finite element program that involves both geometrical and material nonlinearities is developed as a problem solver. A quasi-static lateral loading is given to each model until one cycle of the hysteresis curve is reached (in the displacement range between -20 mm to +20 mm). The above parameters are calculated from the hysteresis curve. From the results, the behaviour of the U-steel damper can be described as follows. Firstly, increasing the energy dissipation in the lateral direction can be done by increasing the lateral stiffness of the damper. However, it can reduce the maximum elastic deformation of the damper. Secondly, under the random direction of loading, a symmetrical shape can increase the energy dissipation of the damper.
Optimisation of an Algorithm for Automatic Control of Transmission in a Wheeled Tractor
Authors: Hoodorozhkov Sergey I. , Krasilnikov Andrey A. , Gubachev Matvey S.
Published: September 2021

The paper considers a digital model of a wheeled agricultural tractor, as well as algorithms for automatic control of the engine and transmission. Simulation of the working conditions was performed in MATLAB and its applications, Simulink, Sim-scape. The tractor model is based on a systemic approach and includes such subsystems as the engine, transmission, undercarriage, hook load, and control actions from the operator, as well as functions of logic and optimisation for gear shifting. With the help of fundamental blocks of the Matlab package, models of tractor physical components are created. The fundamental blocks of the package serve to model the physical components of the tractor: engine, transmission control system, the transmission that includes friction clutches, gears, shafts ties with the necessary characteristics. Simulation of the working processes of a tractor unit is performed with optimisation of the laws of engine and transmission control according to the criterion of fuel efficiency and maximum power usage. The control system parameters were optimised in the transport mode, as well as in the maximum power mode in the traction range. As an illustration of the use of this analysis method, a solution to the problem of optimisation of an agricultural wheeled tractor operating modes is given. The results of this mathematical simulation are presented in this paper. Parameters of tractor operation control algorithm, which provide minimum fuel consumption in tractor operating cycles, are given. The research results showed the effectiveness of the proposed algorithms and the digital model. The presented digital model allows to debug the operating tractor control algorithms and offers an engineering practice for optimising automatic control of the agricultural tractor engine and transmission.
Investigation of Convective Heat Transfer and Friction Factor in Corrugated Channels with Different Inclination Angles Using Computational Fluid Dynamics
Authors: Aslan Erman , Kepekci Haydar
Published: September 2021

Convective heat transfer and friction factor properties for periodic undulating channels are numerically investigated. The finite volume method (FVM) was used in the numerical study. Three different Reynolds averaged numerical simulation (RANS) based turbulence models, shear stress transport SST k-ω and transition SST model were used and compared with each other. Two different channels were used; the first geometry is a sharp corrugated channel with a 30° inclination angle, and the second geometry is a sharp corrugated channel with a 45° inclination angle. The Reynolds number varies in the range of 2000-7500. The Prandtl number was kept constant at 0.7. Nusselt number, friction factor, Reynolds number, and variations of the good factor were investigated. The effect of inclination angle and pitch are discussed.
Experimental apparatus for measurement of photoneutrons from linear accelerator with energy of 16 MeV
Authors: Silva Marcelo Vilela da , Cardoso Domingos D'Oliveira , Vellozo Sergio de Oliveira
Published: September 2021

Particle accelerator technology has a deep impact on society. Its applications are well established mainly in the treatment of cancer and other diseases. This work aims to develop an experimental apparatus with 3He detectors for 16 MeV photoneutron measurements. The apparatus allows us to obtain multienergetic neutrons with the use of a 22 cm diameter spherical attenuator associated with different shield thicknesses. The microscopic processes of the fast and thermal neutrons in the detector were described by the two energy-group diffusion equation. The Detector Response  Dose Rate results show a directly proportional relationship between these two variables with a degree of reliability attested by the linear correlation coefficient .Particle accelerator technology has a deep impact on society. Its applications are well established mainly in the treatment of cancer and other diseases. This work aims to develop an experimental apparatus with 3He detectors for 16 MeV photoneutron measurements. The apparatus allows us to obtain multienergetic neutrons with the use of a 22 cm diameter spherical attenuator associated with different shield thicknesses. The microscopic processes of the fast and thermal neutrons in the detector were described by the two energy-group diffusion equation. The Detector Response  Dose Rate results show a directly proportional relationship between these two variables with a degree of reliability attested by the linear correlation coefficient .
Image quality in chest tomography employing three different equipment technologies
Authors: Silva Kátia Pedrosa , Nogueira Maria do Socorro
Published: September 2021

Computed tomography represents the largest portion of the population´s exposure to ionizing radiation related to medical imaging. This article aims to assess the quality of the images through the analysis of radiologists in routine chest protocols, performed at one hospital and two diagnostic imaging clinics, and employing three equipment with different technologies. A total of 1,088 criteria were analyzed with the three imaging techniques, and the average percentage of the observed structures were 95, 99 and 99% for each service. There was an excellent correlation between observers and even an absolute agreement in some cases for the most modern technologies. The three studied devices provided acceptable dose values and images with a quality close to 100%, reducing the exposure and improving the radiological protection of patients.
TRANSFORMATION VECTORS OF LEGAL REGULATION IN THE FIELD OF ENERGY USE OF WASTE
Authors:   State Organization “V. Mamutov Institute of Economic and Legal Research of NAS of Ukraine”, Kyiv, Ukraine, Trehub О.A.
Published: September 2021

The present article examines the problem of transformation of legal regulation in the field of energy use of waste taking into account both external and internal factors of influence. The main purpose of the article is to specify the vectors of this transformation. One of the vectors is the strengthening of energy specialization of the waste legislation. Within the framework of this issue, the innovations proposed by the draft Law of Ukraine on waste from 04.06.2020 are being considered. Special attention is given to such innovations as waste hierarchy, requirements for incineration and co-incineration of waste, as well as criterion of energy efficiency for incineration facilities. The place of particular energy operation with waste in the waste hierarchy depends on its environmental, resource-saving, energy efficient and other characteristics. The problems of legal regulation in the field of the management of waste from extractive industries with a high energy value are also studied. Another important transformation vector of legal regulation in the field of energy use of waste is a more complete reflection of waste specificity in the energy legislation. The analysis of the laws of Ukraine “On Alternative Energy Sources” and “On Alternative Fuels” shows that the specificity of waste as an energy source is not fully reflected in them. There are new approaches of the Directive (EU) 2018/2001 on the promotion of the use of energy from renewable sources to the regulation of relations in the field of waste as a type of biomass. It is advisable to apply some of these approaches in Ukraine. It is noted that the development of legal regulation along these vectors will contribute to the harmonization of goals of the waste legislation and the energy legislation.
THE “POLYGRAPH SHARIKOV” CONCEPT: PROBLEMATIC ISSUES OF UPDATING THE CIVIL LEGISLATION OF UKRAINE
Authors:   State Organization “V. Mamutov Institute of Economic and Legal Research of NAS of Ukraine”, Kyiv, Ukraine, Koverznev V.O.
Published: September 2021

The article substantiated that by its legal nature the Concept of updating the Civil Code of Ukraine reflects exclusively the personal views of a small group of scientists, the authenticity of which is not confirmed by the results of scientific research; the document does not have the status of a scientific publication and has not passed the procedure for discussion in the professional environment. The private nature of the Concept preparation excludes its use as a basis for legislative work of the Verkhovna Rada of Ukraine. It has been proved that the Concept has methodological problems, and the proposals formulated in it contradict the Constitution of Ukraine, violate social guarantees and do not agree with the norms of the current legislation, in particular: the Law of Ukraine “On Local Self-Government in Ukraine”, the Tax Code of Ukraine, the Land Code of Ukraine, the Law of Ukraine “On Education”, the Law of Ukraine “On Protection of Economic Competition” etc. It was emphasized that the implementation of certain provisions of the Concept for updating civil legislation of Ukraine will lead to the impossibility of practical implementation by local self-government bodies of functions in the field of housing and communal services, consumer services; in the field of culture, health, education, physical education and sports and the commercialization of these services. This will lead to a rapid increase in the level of prices for housing and communal services, the complete destruction of the system of free medical care, as well as free preschool, complete general secondary and professional (vocational) education. Since more than 60% of the population of Ukraine is currently below the poverty line, a significant increase in prices for utilities, the transfer of healthcare institutions, as well as preschool, general secondary and vocational (vocational) education exclusively on the commercial basis of management will deprive the vast majority of the population of the financial opportunity to pay their market value, which will lead to a further decrease in living standards and deterioration of the demographic situation in Ukraine, which is already unsatisfactory. In addition, the population of Ukraine will be limited in access to the services of cultural, physical education and sports institutions. It was concluded that the refusal of the real right of economic management and the right of operational management will create preconditions for depriving territorial communities of communal property and the impossibility of fulfilling their constitutional powers, as well as to enrich a small group of persons of private law and the final impoverishment of the rest of the population of Ukraine.
Yakiv Fleishman. Nonparadic Portrait of the Head of the NKVD Special Department in the Dnipropetrovsk Region
Authors:   Institute of the History of Ukraine of the National Academy of Sciences of Ukraine, Bazhan Oleh , Zolotariov Vadym ,   Kharkiv National University of Radio Electronics
Published: September 2021

Abstract: The complete history of communist terror in Ukraine cannot be created without a thorough study of the state security bodies staff. The disclosure and characterization of the personnel management system in Soviet state security agencies, the revealing of the Chekist personnel selection and rotation principles allow to reconstruct to some extent the mechanisms for managing mass repressions in the Soviet era, to identify those «driving belts» that were used by the Party and Soviet nomenclature to carry out their goals. The research is dedicated to the Soviet state security bodies employee Yakiv Fleishman, whose professional activity was inextricably linked with the political repressions of the Great Terror in the then Dnipropetrovsk region. Keywords: NKVD, Yakiv Fleishman, Great Terror, Dnipropetrovsk region.
Contact Interaction of Steam Turbine Inner Casing Elements During Plastic Deformation
Authors:   JSC Turboatom, Palkov Serhii A. , Palkov Ihor A. ,   JSC Turboatom
Published: September 2021

A structure’s material plasticity influence on the pattern of contact interaction of its elements during operation is studied. The stress-strain state problem for the inner casing of a steam turbine high-pressure cylinder operating at supercritical steam parameters (over 240 atm and 565 °C) is solved. The problem is solved by using a finite-element software package. A model of thermoplasticity with kinematic and isotropic hardening is considered. In carrying out the study, experimental strain curves were used for the materials of the connection. The main dependencies used in solving the problem are given. The method of solving the thermal contact problem of interaction of flange connector elements in the conditions of plasticity is based on the application of a contact layer model. To be able to take into account changes in the load from the fastening in the process of combined strain of both the fastening and the casing, first proposed is a method of the three-dimensional modeling of the thermal tightening of the fastening of the horizontal casing connector by applying the linear coefficient of linear expansion of the material. The proposed approach allows modeling the stress of the initial tightening of studs by specifying a fictitious change (decrease) of the coefficient of linear expansion of a stud given as a separate body in the calculation scheme. The magnitude of the specified change in the coefficient of linear expansion is determined from the relationship between the stress of the initial tightening in the stud and the required, for its creation, elongation, which is implemented in the calculation scheme in the presence of different values of linear expansion of both the stud and the casing. To conduct the numerical experiment, an ordered finite-element grid of the casing design was constructed. A 20-node finite element was used in the construction of the casing grid and the fastening. The effect of force loads and the temperature field, in which the structural element under consideration is operated, is taken into account. An analysis of the results of distribution of equivalent stresses and contact pressure during operation is carried out. The difference between the obtained results and the results of solving the problem in the elastic formulation is noted.
Analysis of Stress-Strain State and Contact Pressures on Surfaces of Kaplan Runner Blade Bearing Bronze Bushes
Authors:   JSC Turboatom, Subotin Viktor H. , Burakov Oleksandr S. ,   JSC Turboatom, Dushyn Oleksii V. ,   JSC Turboatom, Iefymenko Viktor M. ,   JSC Turboatom, Korshunov Oleksii O. ,   JSC Turboatom, Khoryev Oleg M. ,   A. Pidhornyi Institute of Mechanical Engineering Problems of NASU
Published: September 2021

An analysis of the existing and prospective blade seal designs for Kaplan runners was performed. The selected design type provides the maximum ecological safety for Kaplan runners. A 3D model of runner hub sector with the trunnion, inner and outer bushes of blade trunnion was generated taking into account the cyclic symmetry of the runner design based on the modern automated design engineering system. A diagram of application of external loads from the blade and lever to the given 3D model of the Kaplan runner hub segment was developed. The contact problem was formulated to determine the stress-strain state as well as the contact pressures at the inner and outer bronze bushes of the Kaplan runner blade trunnions in different operating conditions. The problem was formulated for the finite element method, taking into consideration the diagram of external load application and contact restraints to the given 3D model of the Kaplan runner hub sector in the software package for engineering calculations. Using calculation results, principal stress distribution diagrams and the distribution diagram for the contact pressure at the outer and inner bronze bushes of blade trunnions were obtained. Strength calculation results were processed using the data of principal stress distribution diagrams, and the contact pressure values at the inner and outer bronze bushes of blade trunnions were determined. A methodology for further use of the given analytical model in the evaluation of stress-strain state of Kaplan runners involving modern automated design engineering systems and software package for engineering calculations was developed. The comparison of stress-strain states of the blade trunnion bushes was performed for the old and new designs of the Kaplan runner seal.
DISCREPANCY PARAMETERS OF APPROXIMATIONS OF DISCRETELY SPECIFIED DEPENDENCIES BY ANALYTICAL FUNCTIONS AND SEARCH CRITERIA FOR OPTIMAL VALUES OF THEIR COEFFICIENTS
Authors:   Institute of Electrodynamics of the National Academy of Sciences of Ukraine, pr. Peremohy, 56, Kyiv, 03057, Ukraine, Zakharchenko S.M. , Shydlovska N.A. ,   Institute of Electrodynamics of the National Academy of Sciences of Ukraine, pr. Peremohy, 56, Kyiv, 03057, Ukraine, Mazurenko I.L. ,   Institute of Electrodynamics of the National Academy of Sciences of Ukraine, pr. Peremohy, 56, Kyiv, 03057, Ukraine
Published: September 2021

Universal discrepancy parameters of approximations of discretely specified dependencies by analytical functions and search criteria for optimal values of their coefficients, as well as analysis of features of their application are described. Discrepancy parameters of approximations, which do not depend on the ranges of variation of the values of functions and the number of points of a discretely specified dependence, are proposed. They can be effective for objectively comparing the quality of approximations of any dependencies by any functions. Approximations of a discretely specified dependence of the mathematical expectation of the equivalent electrical resistance of a layer of aluminum granules during spark-erosion dispersion in water on the instantaneous values of the discharge current are carried out. As approximating functions, we chose a power function with an exponent factor –1 and a function based on exponential. Using the criteria of the least approximation error, the optimal values of the coefficients of both approximating functions are founded. It is shown in which cases it is advisable to use the combined search criteria for the optimal values of the coefficients of the approximating functions, and in which are enough simple one-component ones. Ref. 27, fig. 2, tables 2.
MATHEMATICAL MODELING AND ANALYSIS OF ELECTROMAGNETIC PROCESSES IN THE THYRISTOR CURRENT REGULATOR SYSTEM - SPECIAL TRANSFORMER INSTALLATION INSTALLATION IN BCF
Authors:   Institute of Electrodynamics of the National Academy of Sciences of Ukraine, pr. Peremohy, 56, Kyiv, 03057, Ukraine, Podeiko P.P. , Styazhkin V.P. ,   Institute of Electrodynamics of the National Academy of Sciences of Ukraine, pr. Peremohy, 56, Kyiv, 03057, Ukraine
Published: September 2021

Peculiarities of mathematical modeling are considered and electromagnetic processes in the system “thyristor current regulator - special transformer” (TRS-ST) are analyzed. An indirect method for measuring the temperature of a die plate, which is controlled by the primary current of the CT, is proposed. A simulation model of the TRS-ST system has been created, which makes it possible to take into account the nonlinearity of the characteristics of the transformer core material and the nonlinearity of the load resistance to achieve the required accuracy of electromagnetic processes. The results of simulation confirmed the effectiveness of the developed mathematical model as the difference between the curves of transients obtained by modeling and the curves obtained during research on the experimental setup is not more than 5% and allows to further optimize multi-loop control systems with interconnected and nonlinear parameters. Bibl. 9, fig. 13.
APPLICATION OF HVDC SYSTEMS FOR RES INTEGRATION AND POWER TRANSMISSION FROM THE PROFICIT SOUTH PART OF THE IES OF UKRAINE
Authors:   Institute of Electrodynamics of the National Academy of Sciences of Ukraine, pr. Peremohy, 56, Kyiv, 03057, Ukraine, Pavlovskyi V.V. , Prykhodko A.V. ,   Institute of Electrodynamics of the National Academy of Sciences of Ukraine, pr. Peremohy, 56, Kyiv, 03057, Ukraine
Published: September 2021

The analysis and estimation of advantages from implementation of HVDC systems in parallel to the loaded alternating current lines as a means of solving the problem of power output from surplus energy regions of the IES of Ukraine was presented. Such regions arise with the active development of new Renewable Energy Resources (RES). Two variants of installation of such systems are proposed and the corresponding analysis of electrical modes of IES of Ukraine with reliability criteria "N-1" was executed. References 11, figures 4, table 1.
STUDY OF VOLTAGE MODE IN THE LONG-DISTANCE AC TRANSMISSION LINE
Authors:   National Technical University of Ukraine Igor Sikorsky Kyiv Polytechnic Institute, pr. Peremohy, 37, Kyiv, 03056, Ukraine, Katsadze T.L. , Nastenko D.V. ,   National Technical University of Ukraine Igor Sikorsky Kyiv Polytechnic Institute, pr. Peremohy, 37, Kyiv, 03056, Ukraine, Panienko O.M. ,   National Technical University of Ukraine Igor Sikorsky Kyiv Polytechnic Institute, pr. Peremohy, 37, Kyiv, 03056, Ukraine, Iankovska O.M. ,   National Technical University of Ukraine Igor Sikorsky Kyiv Polytechnic Institute, pr. Peremohy, 37, Kyiv, 03056, Ukraine
Published: September 2021

The charging currents of EHV transmission lines cause the Ferranti effect, which causes an increase in voltage at intermediate points transmission line. The work aims to study the laws of the voltage distribution along the line route and to develop a method for determining the coordinates of a point with extreme voltage. Methodology. Mathematical modeling of long-distance transmission lines in Wolfram Mathematica allowed to form the laws of the voltage distribution along the line and determine the coordinate of the extreme point on the voltage. Results. It is shown that the application of the traditional model of idealized power transmission causes high modeling accuracy only in the modes of unloaded line and low loads. In the range of medium and high loads, the simulation error reaches unacceptably large values. The paper proposes more accurate models for determining the coordinate of an extreme voltage point: linearized and second- and third-order models. It is shown that the proposed models are characterized by higher accuracy in a wide range of loads. Increasing the degree of the model results in higher accuracy, but is associated with an increase in the cumbersomeness of the mathematical model. It is shown that first and second-order models provide sufficient accuracy for typical designs of 750 kV power transmission lines. It is shown that neglecting the losses on the corona has almost no effect on the accuracy of calculating the coordinates of the extreme point on the voltage, which simplifies the linear calculation model and models of the second and third-order. Originality. Mathematical models of the first, second and third orders have been developed for high-precision determination of the coordinate of a voltage-extreme point along a long-distance transmission line. Practical significance. The offered mathematical models are intended for application in problems of regulation and adjustment of parameters of flexible power transmissions. Ref. 12, figure, tables 4.
ANALYTICAL METHOD FOR DETERMINING OPTIMAL PARAMETERS AND SCHEMES FOR VOLTAGE-REGULATED INDUCTION MOTORS WITH SINGLE-PHASE POWER SUPPLY
Authors:   Institute of Electrodynamics of the National Academy of Sciences of Ukraine, pr. Peremohy, 56, Kyiv, 03057, Ukraine, Shurub Yu.V. , Tsitsyurskiy Yu.L. ,   National University of Life and Environmental Sciences of Ukraine, Heroiv Oborony str., 15, Kyiv, 03041, Ukraine
Published: September 2021

On the basis of the method of symmetric components, an analytical method is proposed for calculating the coefficients that determine the relationship between the components of the positive and negative sequences of the parameters of the operating mode of an induction motor and the parameters of its power supply for some circuits for the inclusion of voltage-controlled three-phase induction motors with phase-shifting capacitors powered by a single-phase network. On the basis of this technique, the optimal parameters of phase-shifting capacitors can be determined and rational schemes for connecting three-phase induction motors to a single-phase network can be selected. Ref. 7, fig. 3, tables 2.
ELECTRICAL LOAD FORECASTING ON HIERARCHICAL LEVELS OF IPS OF UKRAINE USING LSTM NEURAL NETWORK
Authors:   Institute of Electrodynamics of the National Academy of Sciences of Ukraine, pr. Peremohy, 56, Kyiv, 03057, Ukraine, Loskutov S.S. , Shymaniuk P.V. ,   Institute of Electrodynamics of the National Academy of Sciences of Ukraine, pr. Peremohy, 56, Kyiv, 03057, Ukraine
Published: September 2021

The scientific research presents the results of a study of one-factor forecasting of the total electrical load at three hierarchical levels of the integrated power system (IPS) of Ukraine using artificial neural networks, such as LSTM. Based on research, forecasting errors at each hierarchical level of the power system were analyzed. Methods for improving the quality and stability of forecasts were proposed. The obtained results are the basis for the study of the assessment of the accuracy of forecasting the summary electrical load in the IPS of Ukraine. Ref. 9, fig. 4, table.
REVIEW THERMOMETRIC METHODS CONTROL COMPRESSION STATOR CORE STATE OF POWERFUL TURBOGENERATORS
Authors:   Institute of Electrodynamics of the National Academy of Sciences of Ukraine, pr. Peremohy, 56, Kyiv, 03057, Ukraine, Zaitsev Ie. O. , Panchyk M. V. ,   Institute of Electrodynamics of the National Academy of Sciences of Ukraine, pr. Peremohy, 56, Kyiv, 03057, Ukraine
Published: September 2021

The article is devoted to the analysis of thermometric methods of control and diagnosis of the state of compression of the stator core of the turbogenerator (TG), which have found the greatest application. It is shown that ensuring effective and high-quality control of powerful electric machines, especially power plant generators, today is an integral part of ensuring the reliability and trouble-free operation of their work. As a result of the analysis, it is shown that ensuring high reliability of operation of the generating equipment is practically impossible without their equipping with modern means of control capable to work in real-time. Bibl. 34, fig. 4.
SINGLE-PHASE HYBRID FILTER FOR DECENTRALIZED POWER SYSTEMS
Authors:   Institute of Electrodynamics of the National Academy of Sciences of Ukraine, pr. Peremohy, 56, Kyiv, 03057, Ukraine, Hubarevych V.M. , Marunia Yu.V. ,   Institute of Electrodynamics of the National Academy of Sciences of Ukraine, pr. Peremohy, 56, Kyiv, 03057, Ukraine
Published: September 2021

The analysis of the single-phase hybrid filter of network current harmonics, which can be applied in the decentralized power system, was carried out. Mathematical modeling of such a system that feeds a bridge rectifier with a capacitive filter and the 10 kW active load was performed. A comparison of current spectrograms and current diagrams of different configurations of a hybrid filter implemented in the active part on the basis of an active corrector of the parallel type, and in the passive part - a broadband LMC filter with an additional winding Ld was carried out. The maximum current deviations from the shape of the first harmonic of the current consumption for different structures of the passive filter were determined, which is decisive for the calculation of the power part of the active filter. The installed power of the active filter was calculated, the harmonic coefficients of the current consumption of the power supply network were obtained. Ref. 11, fig. 5, table.
Neonatal Stress, Health, and Development in Preterms: A Systematic Review
Authors: van Dokkum Nienke H. , de Kroon Marlou L.A. , Reijneveld Sijmen A. , Bos Arend F.
Published: September 2021

CONTEXT

An overview of the full range of neonatal stressors and the associated clinical, laboratory, and imaging outcomes regarding infants’ health and development may contribute to the improvement of neonatal care.

OBJECTIVE

To systematically review existing literature on the associations between all kinds of neonatal stressors and the health and development of preterm infants.

DATA SOURCES

Data sources included Embase, Medline, PsycINFO, the Cumulative Index to Nursing and Allied Health Literature, and reference lists.

STUDY SELECTION

Studies were eligible if they included a measure of neonatal stress during the NICU stay, reported clinical, laboratory, and/or imaging outcomes regarding health and/or development on discharge from the NICU or thereafter, included preterm infants, and were written in English or Dutch.

DATA EXTRACTION

Two reviewers independently screened the sources and extracted data on health and development. Study quality was assessed by using the Newcastle-Ottawa Quality Assessment Scale.

RESULTS

We identified 20 articles that reported on neonatal stress associated negatively with clinical outcomes, including cognitive, motor, and emotional development, and laboratory and imaging outcomes, including epigenetic alterations, hypothalamic-pituitary-adrenal axis functioning, and structural brain development. We found no evidence regarding associations with growth, cardiovascular health, parent-infant interaction, the neonatal immune system, and the neonatal microbiome.

LIMITATIONS

The studies were all observational and used different definitions of neonatal stress.

CONCLUSIONS

Neonatal stress has a profound impact on the health and development of preterm infants, and physicians involved in their treatment and follow-up should be aware of this fact.
Occurrence of Escherichia coli producing extended spectrum β-lactamases in food-producing animals
Authors: Balázs Bence , Nagy József Bálint , Tóth Zoltán , Nagy Fruzsina , Károlyi Sándor , Turcsányi Ibolya , Bistyák Andrea , Kálmán Attila , Sárközi Rita , Kardos Gábor
Published: September 2021

Multidrug resistance due to the production of extended-spectrum beta-lactamases (ESBLs) is a major problem in human as well as in veterinary medicine. These strains appear in animal and human microbiomes and can be the source of infection both in animal and in human healthcare, in accordance with the One Health theorem. In this study we examined the prevalence of ESBL-producing bacteria in food-producing animals. We collected 100 porcine and 114 poultry samples to examine the prevalence of ESBL producers. Isolates were identified using the MALDI-TOF system and their antibiotic susceptibility was tested using the disk diffusion method. ESBL gene families and phylogroups were detected by polymerase chain reactions. The prevalence of ESBL producers was relatively high in both sample groups: 72 (72.0%) porcine and 39 (34.2%) poultry isolates were ESBL producers. Escherichia coli isolates were chosen for further investigations. The most common ESBL gene was CTX-M-1 (79.3%). Most of the isolates belong to the commensal E. coli phylogroups. The porcine isolates could be divided into three phylogroups, while the distribution of the poultry isolates was more varied. In summary, ESBL-producing bacteria are prevalent in the faecal samples of the examined food-producing animals, with a dominance of the CTX-M-1 group enzymes and commensal E. coli phylogroups.
Contamination by antimicrobial-resistant enterobacteria isolated from cell phones and hands in a veterinary hospital
Authors: Hespanha Ana Carolina Valentim , Minto Bruno Watanabe , Cardozo Marita Vedovelli , Menezes Mareliza Possa De , Tasso Júlia Banhareli , Moraes Paola Castro
Published: September 2021

Hospital infections are of great relevance in human and animal health, and fomites are important in the spread of pathogens in hospital units. The aim of this study was to investigate the frequency of enterobacteria in the operating room of a veterinary hospital, the potential cross-contamination of samples, and to characterise the susceptibility profile of the isolates to antimicrobials. Sixty-five samples were collected from five different surgical procedures. These samples came from the hands and cell phones of the surgical team and pet owners, operating tables, and patients. Species detection was performed through polymerase chain reaction, genetic diversity by pulsed-field gel electrophoresis (PFGE), and susceptibility to antimicrobials through an antibiogram.Escherichia coliandProteus mirabilisisolates were obtained from eight samples, from the hands of the anaesthesiologist, the pet owner, and the surgeon; the surgeon's, the nurse's and the anaesthesiologist's cell phones, and two surgical tables. Furthermore, PFGE showed high genetic diversity among the isolates, which showed multidrug resistance. The identification of multidrug-resistantE. coliandP. mirabilison cell phones of the surgical team is a major concern and, although no direct correlation was found, the isolation of these bacteria inside the clean area of the operating room shows the possibility of nosocomial transmission from cell phones to susceptible patients.
City of Mirrors: Songs of Lalan Sai, text, translation and commentary by Carol Salomon, edited by Keith E. Cantu and Saymon Zakaria.
Authors: Lorea Carola
Published: September 2021

City of Mirrors: Songs of Lalan Sai, text, translation and commentary by Carol Salomon, edited by Keith E. Cantu and Saymon Zakaria. New York: Oxford University Press, 2017. xxxiv + 611 pp., £117.50 (hb). ISBN 9780190680220.
Impersonations: The Artifice of Brahmin Masculinity in South Indian Dance, by Harshita Mruthinti Kamath
Authors: Sil Narasingha P.
Published: September 2021

Impersonations: The Artifice of Brahmin Masculinity in South Indian Dance, by Harshita Mruthinti Kamath. Oakland, CA: University of California Press, 2019. xv + 225 pp., $34.95 (pb). ISBN 9780520301665.
Vernacular Tantra? An Analysis of the Bengali Text The Garland of Bones
Authors: Ondračka Lubomír
Published: September 2021

The paper introduces the Middle Bengali text The Garland of Bones (Haramala) into Western scholarship, and poses the question of what milieu it was produced and transmitted in. The main subject matter of this work is Tantric yoga, particularly the concept of the body. Content analysis reveals that it draws from different known sources (East Indian Kaula Sanskrit Tantras and vernacular works), but also contains a substantial amount of material that seems to be unique. Although the study of this text is full of uncertainties, and several questions related to it remain unanswered, the paper concludes that The Garland of Bones was probably composed in seventeenth-century Chittagong in a vernacular Tantric milieu, which was separate from the mainstream Sanskrit-oriented Kaula tradition. Later, probably in the eighteenth century, the text was adopted by the householder Naths in the eastern parts of undivided Bengal, and became one of their most important scriptures.
Right to Pray
Authors: Dhar Ivy
Published: September 2021

Focusing on cultural restrictions on women’s access to the garbhagriha in specific Hindu temples in India, this paper attempts to contextualize the wider debates around gender in faith-based practices and the confrontation between the ‘right to pray’ movement and its opponents. It reviews the complexities of practising public religion in a democratic nation. In the ambit of the contemporary feminist movement, activism has been initiated for reclaiming space for women in the realm of religion and faith. This was most clearly demonstrated in the women-led right to pray movement. The movement has been continuously evolving in local spaces and remains diversified across public places of worship. Debates around the exclusion of women have required the judiciary to reinterpret the relation between public temples and the equality proclaimed by the Constitution. By looking at the Sabarimala and Shani Shingnapur temple protests, this paper reflects on the conflict between activism and faith traditions. It charts the legal outcomes, local responses, political tensions, and the associated gender subjectivity. It attempts to revisit the role of women as recipients rather than agents of religion in public spaces, while extending the arguments to other aspects of ritual.
Prognosis of severe cytomegalovirus infection in newborns
Authors: Kravchenko L. V.
Published: September 2021

Objective is to study the features of impaired activation of T and B lymphocytes in order to predicting severe cytomegalovirus infection in newborns. Materials and methods. 133 newborns with cytomegalovirus infection were examined. Immediately after diagnosing cytomegalovirus infection, all patients observed were immunologically ex amined, including assessing count of peripheral blood T and B lymphocytes, as well as their intercellular interaction by using flow cytometry immunostaining for CD3, CD3+CD28–, CD3+CD28+, CD3–CD28+, CD4, CD8, CD20, CD20+CD40+, CD28, CD40. The test was performed by using a Beckman Coulter Epics XL laser flow cytofluorometer. Depending on the condition severity, all children were divided into two groups: 1 — cytomegalovirus infection, severe form — 60 subjects (45.1%); 2 — cytomegalovirus infection, moderate form — 73 subjects (54.9%). Results of the entire set of studied indicators for cellular and humoral arms of immune system revealed statistically significant differences for the prognosis of severe cytomegalovirus infection: CD3+CD28–, CD20, CD20+CD40+, CD4. T lymphocytes with CD3+CD28+ activation markers, through which costimulating signals necessary for the activation of T helper cells are exerted cell-intrinsic features, serving as an important factor ensuring immune response. Using the “classification trees” method, we developed a differentiated approach to forecast severe cytomegalovirus infection in newborns. Systems of inequalities were obtained, four of which classify a subgroup of newborns with severe cytomegalovirus infection. The consistent application of the obtained inequalities makes it possible to isolate from the input stream of sick patients with a prognosis of the development of severe cytomegalovirus infection. The proposed diagnostic rules can be considered as screening markers for predicting a severe cytomegalovirus infection in newborns, which makes possible the timely onset of specific therapy.
The structure of the oropharyngeal genus Candida fungi community in HIVinfected patients
Authors: Voropaev A. D. , Yekaterinchev D. A. , Nesvizhsky Yu. V. , Zverev V. V. , Afanasiev S. S. , Volchkova E. V. , Afanasiev M. S. , Budanova E. V. , Boshjan R. E. , Likhanskaya E. I. , Urban Y. N. , Filina Yu. S. , Suleymanova M. E. , Voropaeva V. A.
Published: September 2021

At the present time virtually no data are available about the structure of the genus Candida fungus able to target HIV-infected patients and serve as an etiological factor of candidiasis. The aforementioned shaped the aim of the study: to examine structure of the Candida genus community colonizing the oropharynx in HIV-infected patients with clinical manifestations of oropharyngeal candidiasis. There was conducted a microbiological study of the oropharynx in 31 HIV-infected patients (51.6% males and 48.4% females) with clinical manifestations of oropharyngeal candidiasis treated at Moscow Infectious Clinic No. 2 inpatient department in the years 2015–2017. We confirmed the diversity of the oropharyngeal Candida spp. community found in HIV-infected patients. Total 52 isolates of the genus Candida were isolated. C. albicans dominated in 57.7% cases, whereas C. glabrata prevailed (21.1%) among non-albicans species. Minor components were represented by C. tropicalis (11.5%) and C. krusei (9.6%). C. albicans and C. glabrata were sensitive to polyenes, whereas minor community components — to itroconazole and clotrimazole. The vast majority of fungal strains were resistant to fluconazole. The genus Candida community reveals a unique architecture so that any member may exist in the oropharyngeal biotope of HIV-infected patients as a monoculture or in association: homogeneous, consisting of a single species strains, or heterogeneous, formed by several species. Candida fungi in 18 patients (58.1%) were isolated as a monoculture, whereas in 13 (41.9%) subjects — in association consisting of 34 isolates (65.4% of total number), of which 16 (30.8%) and 18 (34.6%) were isolated from homogeneous and heterogeneous associations, respectively. There were identified 9 two-component associations (69.2%), and 4 (30.8%) consisting of three or more components. It turned out that pattern of the examined community was mainly determined by species composition that agrees with previous data. Most common associations were presented by C. krusei (100%) and C. albicans (73.3%). Upon that, most often C. albicans (72.7%) formed a homogeneous type of associations. Sensitivity of Candida fungi to antimycotic drugs also depended on the architecture of related community. C. albicans isolates in heterogeneous associations revealed a wide range of resistance acquired by contact with non-albicans species.