bluuebunny/crossref_metadata_2025 huggingface dataset:
IMPLEMENTATION OF MODERN TECHNOLOGIES TO ALLEVIATE
Authors: Заіменко Наталія , Дідик Наталія , Елланська Наталія , Росіцька Надія , Харитонова Ірина , Юношева Олена
Published: March 2021

Introduction. Urban perennial plantations are exposed to numerous anthropogenic pollutants, recreational load, etc. As a result, the physical and chemical properties of the soil deteriorate, the development of useful soil microflora is inhibited, the phytosanitary properties of soil ecosystems worsen, the intensity of mineralization processes and availability of macro- and micronutrients for plants drops down, and the concentration of toxic substances increases, which leads to soil sickness.
Problem Statement. Today, in Ukraine, the causes and features of soil sickness manifestation in urban ecosystems have been virtually unexplored, and there has been no environmentally sound approach to overcoming negative consequences of this phenomenon.
Purpose. To implement environmentally sound technology for overcoming soil sickness in urban green areas through the integrated use of the natural silicon containing mineral analcite and a synthetic analog of allelochemical (salicylic acid).
Materials and Methods. The experimental sites have been established in the most polluted and anthropogenically disturbed green areas of the Obolon District in Kyiv. The content of micro- and macro-elements, the main ecological-trophic groups of microorganisms have been evaluated, the directions of microbiological processes have been assessed with the use of mineralization and immobilization coefficients. Plant vitality has been determined by the degree of foliar injury, crown defoliation, photosynthetic pigment content, and activity of enzymatic antioxidants in leaves. Soil allelopathic activity has been determined by the bioassay technique.
Results. Physical, chemical, and biological processes related to soil-sickness in urban areas have been studied and approaches to control these processes have been determined. The innovative technology to alleviate soil sickness in urban green areas has been tested.
Conclusions. The advantage of the proposed technology is a complex synecological approach that which provides optimization of agrophysical, agrochemical, and biological characteristics of soil (optimal pH level, balanced content of mineral nutrients, elimination of toxicity), enhances the adaptive potential of cultivated plants to negative biotic and abiotic factors including phytopathogens.
Designing a system to synchronize the input signal in a telecommunication network under the condition for reducing a transitional component of the phase error
Authors: Berkman Liubov , Tkachenko Olga , Turovsky Oleksandr , Fokin Vaceslav , Strelnikov Vitaliy
Published: March 2021

The quality of reception, as well as the processing and demodulation of the input signal in the telecommunication systems' networks, are closely related to the quality indicators in the functioning of one of the subsystems of these networks, namely a phase synchronization system. This work has directly considered the issues related to improving the performance and reducing the transitional component of the phase error generated by transition processes in the combined synchronization system. A mathematical model has been built that makes it possible to synthesize a disrupted link in the synchronization system of a telecommunication network meeting the condition for a decrease in the transitional component of the phase error. It is shown that a simple disrupted link, synthesized under the condition of suppressing a slow-fading transition component, makes it possible to shorten the time of the transition process in the system while maintaining the initial order of astatism. When a complex link is synthesized, the transition process becomes oscillatory.
It was established that under the conditions of a phase jump or a frequency jump, it is possible to improve the dynamics of the system and reduce the transitional component of the phase error variance by making the parameters for the disrupted communication link influence the roots of the characteristic equation of the transition process. The features in synthesizing disrupted communication have been considered for the intervals of movement corresponding to areas with the positive and negative inclination of the phase discriminator's static characteristic. Such conditions have been devised that make it possible to determine the value and sign of the root in the characteristic equation of the transition process, which is introduced by the parameter of a disrupted communication link separately for areas of the stable and non-steady movement of the phase discriminator's static characteristic. The reported mathematical model of disrupted link synthesis has made it possible to derive reference results. They indicated that in order to suppress the slowly fading component of the phase error characteristic equation to "0", it is necessary to provide for a significant advantage, up to 10 times, of the roots introduced by the disrupted communication link over the roots of the specified component. By changing the value for a disrupted communication parameter, one can significantly, up to 5 times or larger, shorten the time of the transition process in the combined synchronization system at a simultaneous decrease of 18‒25 % in the initial value of the transition error
Development of model of a web-based information system control problem
Authors: Levykin Viktor , Ievlanov Maksym , Neumyvakina Olga , Рetrychenko Oleksandr
Published: March 2021

The object of research is the processes of operation of a web-based information system. The conducted research is based on the application of existing approaches to organizing the operation of IT products, as well as on the previously developed formal model of the problem of managing the operation of an information system. The existing assessment of the satisfaction degree of the requirements for the system was adopted as the main criterion for managing the operation of the information system. The main hypothesis of the study is the assumption that the main criterion for managing the operation of a web-based information system should be considered the efficiency indicator as the ratio of the degree of satisfaction of requests for changes in individual components of the information system and the total costs of operating the system. The analysis of the applicability of the criterion «Satisfaction of the requirements of users of the information system» is carried out and its incomplete objectivity is shown for describing the goals of managing the operation of the information system. The use of the management efficiency indicator is substantiated, the features of the use of this indicator for solving the problem of managing the operation of the information system are considered. The existence of two approaches to determining the efficiency of the operation of an information system is recognized. Based on the results obtained, a concept for managing the operation of a web-based information system is proposed. This concept represents the main task of managing the operation of a web-based information system as a special case of a multicriteria optimization problem, the solution of which will be a Pareto-optimal system. On the basis of the proposed concept, a mathematical model of the problem of effective management of a web-based information system has been developed. To describe the function of the goal in the course of developing the model, it is proposed to move from descriptions of requirements to knowledge-based models of requests for changing the information system. It is also proposed to divide the set of model constraints into two separate complexes – a set of technical management constraints and a set of operating process constraints. Application of the developed model will make it possible to create new information technologies for managing the operation of web-based information systems for enterprise management. In contrast to the existing ones, such technologies will allow formalizing and automating the work on the formation and approval of the most profitable for the participants in the operation of the information system of project plans for fulfilling requests for changes in the operating system.
Conveyorized implementation of ASWM image filter on PLD
Authors: Vasylchenkov Oleg , Liberg Igor , Mozhaiev Mykhailo , Salnikov Dmytro
Published: March 2021

The object of research is the adaptive switching weighted median image filter (ASWM) algorithm. This algorithm is one of the most effective in the field of impulse noise suppression. The computational complexity and algorithmic features of this adaptive nonlinear filter make it impossible to implement a filter that works in real time on modern PLD microcircuits.
The most problematic areas of the algorithm are the weight coefficient estimation cycle, which has no limit on the number of iterations and contains a large number of division operations. This does not allow implementing the filter on PLDs with a sufficiently effective method.
In the course of the research, the programming model of the filter in Python was used. The performance of the algorithm was assessed using the Peak Signal-to-Noise Ratio (PSNR) and Structural Similarity Index Measure (SSIM) metrics.
Modeling made it possible to find out empirically the number of iterations of the cycle for estimating the weight coefficients at different levels of noise density and to estimate the effect of artificial limitation of the maximum number of iterations on the filter performance. Regardless of the intensity of the noise impact, the algorithm performs less than 40 iterations of the evaluation cycle. Let’s also simulate the operation of the algorithm with different variants of the division module implementation. The paper considers the main of them and offers the most optimal in terms of the ratio of accuracy/hardware costs for implementation. Thus, a modified algorithm was proposed that does not have these disadvantages.
Thanks to modifications of the algorithm, it is possible to implement a pipelined ASWM image filter on modern PLDs. The filter is synthesized for the main families of Intel PLDs. The implementation, which is not inferior in terms of SSIM and PSNR metrics to the original algorithm, requires less than 65,000 FPGA logical cells and allows filtering of monochrome images with FullHD resolution at 48 frames/s at a clock frequency of 100 MHz.
Research and development of the structure of a vortex heat generator by the method of mathematical modeling
Authors: Yaris Vadim , Kuzyayev Ivan , Nikolsky Valeriy , Ved Viktor , Peter Chlens , Palagnyuk Andrii , Lobodenko Antonina , Reshetnyak Iryna
Published: March 2021

The object of research is a mathematical model of a new design of a vortex heat generator with translational-rotational flow in a variable geometry working space.
One of the most problematic areas in the development of new and promising designs of heat generators by the method of physical modeling is the search for its optimal operating-technological and instrumental-design parameters. The implementation of a preliminary analysis of such structures by the method of mathematical modeling will significantly reduce the time and material costs for the development of promising designs of heat generators.
The studies of the design of the new vortex heat generator, carried out by the method of mathematical modeling, made it possible to determine the range of its operation, to evaluate the operating-technological and hardware-design parameters that affect the efficiency of work. Studies of the hydrodynamics of the translational-rotational motion of a viscous fluid flow in the working space of a new vortex heat generator with a variable geometry of the working space made it possible to determine the critical velocity and pressure, the influence of the geometric parameters of the device on the generation of vortices that promote cavitation. Model studies were carried out in the range of fluid load changes in the range from 0.001 m3/s to 0.01 m3/s. The study of changes in the velocity field in the channels was carried out for the geometry of the channel with a taper angle  from 0° to 25°. The width of the working channel of the space Wn varied in the range of 130, 70 and 40 mm.
It has been established that a good axial symmetry and smoothness of the coolant flow in the vortex zone along the swirler screw provides the coolant inlet through a nozzle with a rectangular cross-section. The dependence of the influence of the flow area of the nozzle for introducing the coolant into the vortex zone on the energy efficiency of the vortex apparatus as a whole is found experimentally.
The research carried out makes it possible to design vortex heat generators with geometric parameters that meet modern energy efficiency requirements. The geometry of the swirler screw is determined, which increases the efficiency of the heat generator by 35 % in comparison with similar designs of vortex heat generators given in the literature.
Study of dust collection effectiveness in cyclonic-vortex action apparatus
Authors: Torsky Andrei , Volnenko Alexander , Plyatsuk Leonid , Hurets Larysa , Zhumadullayev Daulet , Abzhabparov Аbay
Published: March 2021

The object of research is the efficiency of dust collection of fine dust in an apparatus with an intense turbulent mode of phase interaction. One of the most problematic areas of the existing dust and gas cleaning equipment is the low efficiency of collecting fine dust. Effective cleaning of exhaust gases from dust involves the use of multi-stage cleaning systems, including wet and dry dust cleaning devices, which entails high capital and operating costs. These disadvantages are eliminated in the developed design of the cyclone-vortex dust collector with two contact zones. The device implements both dry and wet dust collection mechanisms, which allows for high efficiency of dust removal at high productivity.
The conducted studies of the total and fractional efficiency of dust collection when changing the operating parameters of the developed device showed that the efficiency of collecting fine dust is 98–99 %. The increase in the efficiency of dust collection in the dry stage of the device is due to an increase in centrifugal force. In the wet stage of contact, the efficiency reaches its maximum values due to the vortex crushing of the liquid in the nozzle zone of the apparatus. Studies of the fractional efficiency of the apparatus show that with an increase in the diameter of the captured particles, the efficiency of the dust collection process for dry and wet stages, as well as the overall efficiency, increases. With an increase in the density of irrigation, the overall efficiency of dust collection in the apparatus increases. It has been established that an increase in the efficiency of capturing highly dispersed particles occurs due to turbulent diffusion, the value of which is determined by the frequency of turbulent pulsations and the degree of entrainment of particles during the pulsating motion of packed bodies. To describe the results obtained, a centrifugal-inertial model for a dry contact stage and a turbulent-diffusion model of solid particle deposition for a wet contact stage are proposed, which make it possible to calculate the dust collection efficiency of the contact stages, as well as the overall efficiency of the cyclone-vortex apparatus.
The results obtained show the prospects of using devices of this design at heat power plants and other industries.
Analysis of the directions for improving the development systems for oil fields at the later stage
Authors: Doroshenko Volodymyr , Titlov Oleksandr
Published: March 2021

The object of research is oil fields at a late stage of their development. The most problematic issues in the development of oil fields are the formation and withdrawal of residual oil reserves. This problem is especially acute at the late or final stage, when the oil productivity of the wells decreases and the water cut of the production catastrophically increases. The most acceptable development system in such conditions is the use of methods for increasing oil recovery and, first of all, by injecting water into the reservoir. At the same time, the problematic issue is the lack of reliable information on the paths of water movement from injection to production wells and the imperfection of methods for aligning the injectivity profile in injection wells and the flow profile in production wells.
In the course of the study, statistically analytical methods were used to analyze the state of development of oil fields at a late stage and industrial approbation of methods for tracing water movement and substantiation of a reagent base to align the paths of water movement and oil inflow.
A set of reagents and technological methods for ensuring the regulation of the process of flooding of oil fields at a late stage of their development have been investigated and developed. It has been proven that a promising direction is the injection of a 0.1 % aqueous solution of the Polycar polymer together with water. This solution first of all penetrates into highly permeable, water-washed, formation intervals, contributing to the leveling of the injectivity profile, reducing the water cut of surrounding production wells and increasing their oil productivity.
Thanks to the research carried out, directions and means of improving the systems of field development at a later stage have been developed by organizing targeted (selective) waterflooding of oil deposits based on high-quality and comprehensive control of the movement of filtration flows in the reservoir. This will ultimately contribute to achieving and maintaining the design value of reservoir pressure, preventing a decrease in the rate of decline in oil production, obtaining the design value of the sweep efficiency by waterflooding, and withdrawing residual oil reserves.
Simulation of impulse current generator for testing surge arresters using frequency-dependent models
Authors: Trotsenko Yevgeniy , Brzhezitsky Volodymyr , Protsenko Olexandr , Haran Yaroslav
Published: March 2021

The object of research is the equivalent circuit of an impulse current generator designed for testing surge arresters. Calculation of the impulse current generator parameters when discharging a capacitor bank to a complex nonlinear load is a difficult task for an analytical solution. Until now, the application of surge arrester frequency-dependent models was limited to the problems of overvoltage computation. Surge arrester frequency-dependent models can predict the residual voltage with high accuracy. This is the reason to consider that surge arrester frequency-dependent models can be used for calculating the main parameters of impulse current generators designed for physical testing of surge arresters.
The task of determining the equivalent circuit parameters required for getting a discharge current of a given waveform and amplitude in an impulse current generator scheme with a nonlinear load was solved using circuit simulation.
This article presents the results of studying the processes in impulse current generator equivalent circuit. In the circuit a dynamic model of a surge arrester is used as the load model. For this, an equivalent circuit for the discharge path of the impulse current generator was drawn up. The parameters of the circuit elements (including the required number of capacitors and their charging voltage) are determined, which are necessary for getting a discharge current of a given standardized waveform and amplitude. The parameters of the discharge path are determined for surge arresters of three different voltage classes. It was found that the relative error when determining the residual voltage between the terminals of the surge arrester model does not exceed 3 %.
The work contributes to the further development of circuit simulation of surge arresters and the expansion of the scope of surge arrester dynamic models. As a result of the research performed, the possibility of using surge arrester frequency-dependent models for determining the discharge current waveform in impulse current generators is shown. The research performed is relevant due to the fact that surge arresters have become a main tool for protecting the insulation of electrical network equipment against external and internal overvoltages
Development and research of a model for optimizing the composition of a project-oriented forwarding company’ suppliers
Authors: Pavlova Nataliia , Onyshchenko Svitlana
Published: March 2021

The object of this research is the composition of the suppliers of a project-oriented transport and forwarding company. The work is aimed at determining the composition of the suppliers of a project-oriented transport and forwarding company, the purpose of which is to obtain a synergistic effect, which manifests itself in reducing the costs of performing individual operations of the transport process while meeting local requirements for each project.
This study proposes an optimization model that allows to determine the composition of suppliers of a project-oriented organization in order to obtain the maximum systemic effect – a synergistic effect. The proposed approach is based on the creation of a virtual project management office, the work of which is based on the corresponding information system. The proposed model is a flexible tool that allows to quickly form the composition of suppliers of a project-oriented company. The model is developed for the service sector and, in particular, for the transport industry, where suppliers are not responsible for material objects, resources, but for services, the set of which forms the essence of the project. Thus, the product of the project and its parameters in such a situation are directly formed due to the specifics of suppliers and the parameters of their services. For the transport industry, this approach has not been used before and can serve as a theoretical basis for building a project-oriented management system in the transport sector. The synergistic effect taken as a basis in this model provides the greatest difference between the «declared» delivery costs and the «actual» ones, which are formed taking into account the amount of work for all projects. Since the freight forwarding company is the «holder» of the portfolio of all deliveries/projects, a certain part of the synergy effect can be used to reduce delivery costs for customers in order to increase competitiveness and attractiveness.
Experimental studies have substantiated the reliability of the results of the developed model and confirmed its practical applicability. This model is quite universal and can be supplemented with restrictions that take into account the specifics of a project-oriented organization, its projects and requirements for suppliers.
Influence of TiC powder particles on structural features and mechanical properties of spark plasma sintered Ni3Al
Authors:   Tomsk State University (Tomsk, Russian Federation), Osipov D.A. , Smirnov I.V. ,   National Research Tomsk State University; Institute of Strength Physics and Materials Science of SB RAS, Grinyaev K.V. ,   National Research Tomsk State University; Institute of Strength Physics and Materials Science of SB RAS, Ditenberg I.A. ,   National Research Tomsk State University; Institute of Strength Physics and Materials Science of SB RAS, Korchagin M.A. ,   Institute of Solid State Chemistry and Mechanochemistry SB RAS
Published: March 2021

Intermetallic Ni3Al and Ni3Al+TiC composite specimens were consolidated by spark plasma sintering of the precursors obtained by preliminary mechanical activation of 3Ni-Al powder mixture in high-energy ball mills followed by the addition of TiC powder and without it. A comparative study of the influence of TiC was carried out by methods of structural investigation and measurement of mechanical properties. After consolidation, no effect of the introduced particles on the structure parameters of the intermetallic matrix was revealed. Under synthesis conditions and subsequent high-temperature annealings, TiC does not interact with the intermetallic matrix. The presence of coarse TiC particles contributes to the additional embrittlement of the Ni3Al+TiC composite at room temperature, while at high temperatures, a significant increase in strength and ductility is observed compared to pure Ni3Al. It was shown that an increase in the testing temperature leads to a change in the fracture mechanisms of the intermetallic matrix and coarse TiC particles.
Formation of luminescing high-temperature ceramics under powerful flux of high-energy electrons
Authors:   National Research Tomsk Polytechnic University, Lisitsyn V.M. , Lisitsyna L.A. ,   Tomsk State University of Architecture and Building, Golkovski M.G. ,   Budker Institute of Nuclear Physics of SB RAS, Mussakhanov D.A. ,   National Research Tomsk Polytechnic University, Ermolaev A.V. ,   National Research Tomsk Polytechnic University
Published: March 2021

It is shown that a synthesis of MgF2 and YAG: Ce ceramics is realized with a high rate from a charge of a low bulk density in the field of powerful electron flux with an electron energy of 1.4 MeV. The high efficiency of the synthesis is due to the formation under powerful radiation flux of radiolysis products which stimulate solid-phase and gas-phase reactions in the charge.
Holographic description of the early universe
Authors:   Tomsk State Pedagogical University, Makarenko A.N. , Timoshkin A.V. ,   Tomsk State University of Control Systems and Radioelectronics
Published: March 2021

The holographic principle is applied to the description of the Universe at an early stage of its evolution. As an example, we study a cosmological model with a bounce followed by a transition to the early stage of inflation. We study cosmological models of a viscous fluid with a generalized equation of state in terms of holographic cutoff proposed by Nojiri and Odintsov. Within these models, the infrared radius is calculated in terms of the particle horizon or event horizon. The laws of energy conservation are obtained from a holographic point of view. A viscous fluid describing bounce and early inflation is presented as generalized holographic energy
Theoretical investigation of frequency multiplier based on irregular quarter-wave microstrip resonator with thin magnetic film
Authors:   Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Belyaev B.A. ,   Siberian Federal University, Izotov A.V. ,   Kirensky Institute of Physics, Federal Research Center KSC SB RAS; Siberian Federal University, Leksikov An.A. ,   Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Solovev P.N. ,   Kirensky Institute of Physics, Federal Research Center KSC SB RAS; Siberian Federal University, Tyurnev V.V. ,   Kirensky Institute of Physics, Federal Research Center KSC SB RAS
Published: March 2021

The characteristics of a frequency doubler on a resonance microstrip structure with a thin magnetic film have been studied theoretically. The electrodynamic calculation of the structure was performed in the framework of the quasistatic approximation. Nonlinear response of the film magnetization was calculated by taking into account second-order terms in the Landau-Lifshitz equation. The amplitude-frequency characteristic of the microstrip resonator was calculated. It was shown that due to the use of the resonant design, high conversion efficiency of the input signal energy to the output signal at a double frequency was achieved. The optimum values of the external constant magnetic field magnitude and orientation, at which generation of the second harmonic peaked, were determined.
Properties of inertia of a solid body
Authors:   Kalmyk State University named after B.B. Gorodovikov, Goldvarg T.B. , Shapovalov V.N. ,   Kalmyk State University named after B.B. Gorodovikov
Published: March 2021

Definitions are given and properties of inertial characteristics of solid are formulated; the influence of geometric symmetry of the body on its characteristics is described. The geometric approach to the presentation of the material is used.
Measurement and calculation of the parameters of mechanical properties of silicone rubber
Authors:   A.I. Yevdokimov Moscow State University of Medicine and Dentistry, Muslov S.A. , Polyakov D.I. ,   A.I. Yevdokimov Moscow State University of Medicine and Dentistry, Lotkov A.I. ,   Institute of Strength Physics and Materials Science of SB RAS, Stepanov A.G. ,   A.I. Yevdokimov Moscow State University of Medicine and Dentistry, Arutyunov S.D. ,   A.I. Yevdokimov Moscow State University of Medicine and Dentistry
Published: March 2021

The measurement and calculation of the mechanical properties of silicone rubber used for the manufacture of a prosthesis for the auricle of patients based on dental CAD/CAM systems, using a hybrid technology that includes traditional and digital methods of manufacturing medical devices were performed. Mechanical tensile tests were carried out in a climatic chamber at various temperatures: -20; 0; 25; 40 °C. All mechanical characteristics of silicone rubber lay in a very limited range of values and monotonically decreased with increasing test temperature from -20 to + 45°C. At the same time, the elastic characteristics (elastic modulus) decreased by 1.55, deformation (fracture deformation) - by 1.98, strength (tensile strength) - by 2.37 times. The average values of tensile strength were 6.54 MPa, fracture deformation - 1480.61%, modulus of elasticity - 0.53 MPa, and temperature gradient: 0.08 MPa/deg, 14.8%/deg and 0.004 MPa/deg, respectively. In the framework of the Mooney - Rivlin hyperelastic model, the coefficients of the model C 01 and C 10 are determined, which can be used as parameters when performing simulation modeling of the stress-strain state of prostheses. Based on the data obtained, an assessment was made of the cross-linked density of the silicone rubber material as a synthetic polymer. It turned out to be equal to 0.49.
Relaxation mode of macroscopic plastic deformation in metals
Authors:   Institute of Strength Physics and Materials Science of SB RAS, Khon Yu.A. , Zuev L.B. ,   Institute of Strength Physics and Materials Science of SB RAS
Published: March 2021

The relaxation of elastic energy during macroscopic plastic deformation in a strict formulation is determined by the solutions of the system of nonlinear equations of mechanics of a deformable solid. Using the methods of the theory of nonlinear systems, a nonlinear parabolic equation is obtained for the amplitude of an unstable mode, which describes plastic deformation at large spatial and temporal scales.
No rastro do "indiferente jurídico": ensaio de antropologia do direito a propósito de um movimento grevista de professores
Authors: Pazello Ricardo Prestes
Published: March 2021

Resumo: O presente ensaio busca realizar uma reflexão sobre a noção gramsciana de "indiferente jurídico" a propósito de uma greve de professores universitários. Tendo por ponto de partida o campo da antropologia jurídica, em diálogo com perspectivas críticas do direito, o texto apresentará uma concepção ampliada do fenômeno jurídico como relações sociais em contraponto ao normativismo, a fim de problematizar as ambiguidades da cultura jurídica. Por fim, a proposta analisará a produção de documentos no contexto da greve docente de 2012, demonstrando o lugar da mesma no "indiferente jurídico" e a existência da hegemonia de ideologia jurídica de harmonia coerciva do "acordo sem acordo".Palavras-chave: antropologia jurídica; indiferente jurídico; teorias críticas do direito.Abstract: This essay aims to reflect on the Gramscian notion of "juridical indifferent" regarding a strike by university professors. Starting from the field of legal anthropology, in dialogue with critical perspectives of Law, the text will present an expanded conception of the legal phenomenon as social relations in opposition to normativism, in order to problematize the ambiguities of legal culture. Finally, the proposal will analyze the production of documents in the context of the 2012 professors strike, demonstrating its place in the "juridical indifferent" and the existence of the hegemony of legal ideology of coercive harmony of the "agreement without agreement".Keywords: legal anthropology; juridical indifferent; critical theories of Law
Micro Grid Operation Mode With Different MPPT Controller
Authors: Mizher Baht Ihsan , Al Sarhan Farah Fahem , Nicolae Petre-Marian , Bahat Nameer
Published: March 2021

The extent to which current is minimized helps in ensuring that the island to grid-connected mode transition is effectively controlled. This applies not only in the short-term but also in the long-term. This is also useful because it helps in maintaining the required level of flexibility as far as the framework of controlling island to grid-connected mode transition is concerned. The integration of interconnectors can also be useful with regard to control of island to gridconnected mode transition. This is because interconnectors can help in identification of shortcomings and existing gaps as far as the framework of island to grid-connected mode transition is concerned. A major reason why the use of interconnectors can help in controlling the island to grid-connected mode transition is that they facilitate continuous monitoring of the grid. This implies that the relevant changes can be identified and incorporated into the island to grid-connected mode transition, in this paper also comparative between two type of the algorithm control MPPT based on the fixed irradiance and temperature.
Express Methods and Procedures for Determination of the Main Egg Quality Indicators
Authors: Alikhanov Jakhfer , Moldazhanov Aidar , Kulmakhambetova Akmaral , Shynybay Zhandos , M. Penchev Stanislav , D. Georgieva Tsvetelina , I. Daskalov Plamen
Published: March 2021

The article considers the methods, procedures and results of experimental studies of the main egg quality indicators. The offered express methods and the automated installation provide definition of the weight, the form and density of egg. Based on the results of experimental studies of egg parameters, the express method of determining the volume of the egg through the area of the longitudinal section and the small diameter of the egg is substantiated. The express method for density determination by direct mass measurement and volume calculation gives minimal absolute error and provides a six time increase in performance, compared to the direct method.
Assessing the Maturity of Corporate Social Responsibility Practices: An Applied Study on Telecom Companies in KSA
Authors: Ahmed Laghouag Abderrazak , Farhi Faycal , Zafrah Faiz Bin
Published: March 2021

Corporation social responsibility (CSR) practices are, nowadays, inescapable and more needed than ever considering the growing environmental institutional requirements as well as performance indicators that are increasingly including CSR issues to evaluate companies. CSR should not be considered as cost center, it is a vital source of company value and reputation. Actually, companies operating in KSA are not an exception of this CSR matter. This paper aims mainly to evaluate and analyze the maturity of CSR practices through an empirical study for Telecom companies in KSA, namely STC, Zain and Mobily. From a deepen literature review, four main CSR practices have been identified, namely: economic, ethical, legal and philanthropic practices. A questionnaire has been developed to test and validate research hypothesis. The results show a high level of CSR practices, except for the philanthropic practices.
Approaches to the Organization of International Accounting in Russian Enterprises
Authors: V. Surkova Ekaterina , A. Skachko Galina , K. Nikandrova Larisa , M. Starkova Maria , F. Sakharova Nina
Published: March 2021

The article discusses current issues of transformation of accounting information in accordance with international financial reporting standards (IFRS). This study is primarily aimed at developing approaches that determine the need for Russian enterprises to provide accounting information comparable at the international level. The authors analyze methods of transferring data from the Russian Accounting Standard (RAS) to IFRS. The methods used to form financial statements in accordance with IFRS are discussed. The issues of the application of these methods, as well as their advantages and disadvantages, are discussed. The author's approach to the selection of the optimal method of transformation is proposed taking into account the individual needs of organizations.
Cytotoxicity and Antibacterial Activity of Toothpastes and Mouthwashes Available in the Iranian Market
Authors: Shahidi Zahra , Tavakol Davani Shiva , Noori Faranak , Hasani Tabatabaei Masoumeh , Sodeif Fatemeh , Etemadi Ardavan , Chiniforoosh Nasim , Moradi Zohreh
Published: March 2021

Objectives: Toothpastes and mouthwashes contain chemicals that may be harmful to oral tissues. This study assessed the cytotoxicity and antibacterial activity of toothpastes and compare the Iranian and foreign toothpastes and mouthwashes available in the Iranian market in this respect.
Materials and Methods: Twenty samples (13 toothpastes and 4 mouthwashes) were selected. The cytotoxicity of 1, 10, and 50 mg/mL of toothpastes and 0.05, 2 and 10 µL of mouthwashes was measured after 1, 15 and 30 min of exposure to human gingival fibroblasts, each in triplicate. The methyl thiazolyl tetrazolium (MTT) assay was used for cytotoxicity testing. The serial dilution method was utilized to determine the minimum inhibitory concentration (MIC) of each sample against Lactobacillus acidophilus (L. acidophilus) and Streptococcus mutans (S. mutans). Two-way ANOVA and Tukey’s test were used for data analysis.
Results: A significant difference in cytotoxicity was noted among different products (P=0.00). The difference in cytotoxicity of each sample was not significant at 1, 15 and 30 min (P=0.08). The obtained MIC for all toothpastes and mouthwashes was between 0.0039 mg/mL and 0.0156 mg/mL, except for Sensodyne toothpaste and Oral B mouthwash.
Conclusion: Some brands of toothpastes have higher cytotoxicity due to their composition, and their cytotoxicity should not be overlooked. The antibacterial activity of the samples was almost equal when they were in contact with L. acidophilus and S. mutans except for the Irsha mouthwash, Sehat, Darugar and Bath toothpastes. The antibacterial effect of toothpastes and mouthwashes increased with an increase in exposure time.
Studying COVID-19 Disease Management: A Review Study
Authors: Najafi Marziye , Nazari Mortez , Pouragha Behrooz , Mohammadi Ali Jamal , Baghian Najmeh , Ashrafi Ensieh , Rajaee Roya
Published: March 2021

Background: This study has been examined in order to examine the studies conducted on disease management in the field of coronavirus caused disease in the type of COVID-19 in the form of area review regarding the development of coronavirus caused disease as a significant challenge in the 21st century and the importance of managing and controlling this disease.
Methods: This study was conducted in the form of a field review to identify non-clinical and non-laboratory aspects of coronavirus in both Persian and English and the keywords such as "corona", "coronavirus", COVID-19 " were searched in the databases from "Scopus", "Web of Science", "PubMed", "SID" as well as "Google Scholar" search engines since the beginning of 2020.
Results: The contents were searched in the adopted databases, and a total of 1257 studies were discovered, and eventually, 18 main papers were extracted and applied after applying the inclusion and exclusion criteria. As the results obtained by the studies explain, a high percentage of the papers focused on stress management, crisis control, and management, focusing on employees and providing the solutions to decrease stress, including exercise, establishing beneficial relationships with relaxation, and so on.
Conclusion: It is better governments provide remote health care services for patients to diagnose and treat this disease due to the speedy spread of coronavirus, lack of definitive treatment, and absence of sufficient quarantine infrastructure for developed patients. Crisis conditions cause all populations engaged in society to share a common purpose and utilize common values in a cooperative movement and progress.
Randomized Primality Tests
Authors: Kozachok Oleksandra
Published: March 2021

Randomization and probabilistic approach in the algorithms development occupy prominent place.Due to limited computing resources and complexity many tasks in some cases it’s impossible to obtain accurate results or it’s too costly, so the results may contain some uncertainty. There are also cases when the indeterminacy of the algorithm is its advantage, for example in cryptography problems, or a useful characteristic: in simulations of processes containing undefined parameters.In this paper, we consider the basic concepts and statements concerning randomized algorithms for checking numbers for simplicity, we present the necessary theorems.
Constraints and Management Practices of Dairy Farming during COVID-19 Pandemic Situation
Authors: Saravanan K.P. , Silambarasan P. , Manivannan A. , Sasikala V. , Sivakumar T.
Published: March 2021

Background: The COVID-19 pandemic and subsequent lockdown have created unprecedented emergency and sudden distress on all sectors in India including the livestock sector. Among livestock sectors, dairy farming is more sensitive due to the handling of an essential and perishable commodity of milk. Methods: Under this pandemic situation, the aim of the study to know the constraints confronted and management practices followed by dairy farmers during the COVID-19 pandemic situation. The study was conducted in July 2020 in Cuddalore district of Tamil Nadu. Thirty dairy farmers were selected randomly and data were collected by a personal interview method through a well-structured interview schedule. Socio-economic data were analyzed by statistical methods viz. percentage, mean and standard deviation. Constraints of dairy farming were analyzed and ranked by Mean Weighed Score method and percentage analysis was used for analyzing and ranking management practices. Result: Socio-economic characterstics revealed that more than 86.66 per cent of dairy farmers were belonged low to medium groups and utilized different mass media tools for retrieving information. The constraints analysis revealed that high cost of concentrate feed foremost constraint with Mean Weighed Score of 50.00 were ranked first. Dairy farmers expressed difficultly in the procurement of concentrate, shortage of wheat bran supply and elevated wheat bran cost (MWS 44.44) second important constraints. Dairy farmer’s made alterations in the concentrate feed composition, consulted veterinary doctors over the phone and direct selling of milk as management practices to manage the pandemic situation.
Effect of Different Levels of Organic and Inorganic Fertilizers on Maize (Zea mays L.)
Authors: Singh Sukhjinder , Misal N.B.
Published: March 2021

A field experiment was carried out in randomized block design, consists of seven treatments with three replications at Agricultural Research Farm, Lovely Professional University, Jalandhar, Punjab during kharif season of year 2016. The combined application of FYM, vermicompost and chemical fertilizers (50% Recommended dose of NPK + 25% FYM + 25% Vermicompost) gives significantly higher results in growth parameters (plant height 238.47 cm, stem girth 12.3 cm, number of green leaves 15.33 and number of internodes 18.10) and yield attributes (1.33 cobs per plant, cob length 15.72 cm and 459 grains per cob) as well as yield (grain yield 5400 kg ha-1) as compared to rest of treatments as well as control.
Assessment of Maturity over Seasons using Various Indices in Groundnut (Arachis hypogaea L.)
Authors: Vishnuprabha R. Sangeetha , Viswanathan PL , Manonmani S. , Rajendran L. , Selvakumar T.
Published: March 2021

Background: Groundnut is a crop with puzzling nature of maturity. The ability to determine the correct data of harvest in groundnut is strongly affecting factor of the economic return from the crop. Among the different methodologies suggested for calculating the maturity index in groundnut, those which could be used at field level and with ease includes: shell out method, seed hull ratio maturity index, hull scrape method and maturity profile board (MPB) method. The present study was taken up to evaluate the efficiency of these methods in determining the maturity duration. Methods: The maturity indices were calculated in the varieties CO 7, ICGV 07222, VRI 6, VRI 8, GPBD 4, VRI 3, Chico, Gangapuri, ICGV 91114 and ICGV 93468 cultivated during 2018-19, at Tamil Nadu Agricultural University, Coimbatore. Result: In shell out and hull scrape method maturity indices ranging from 70-80% and in Seed hull ratio maturity index the range 2.9-3.6 revealed the highest number of matured pods with maximum weight. The correlation study results showed highest efficacy of hull scrape method in predicting the correct date of harvest in groundnut. The method establishes that the colour of mesocarp exactly reveals maturity status of groundnut pods. Thus, maturity index in groundnut is more reliable when calculated by hull scrape method. In case when the maturity index is below 70% the pods could be arranged on a maturity profile board (MPB) to determine the days until digging.
Development of Project-Based Learning Materials on Heat and Temperature to Train Student’s Scientific Skills
Authors: Labiiq 'Aisyah Ummu , Sukardiyono Sukardiyono
Published: March 2021

This research aims to produce project-based learning materials on temperature and heat, which are suitable for use in improving scientific skills and learning outcomes in cognitive aspects. The research and development method is carried out in seven steps: a preliminary study, planning, product draft development, limited trial, product draft revision, wider trial and initial product revision. Products are rated by seven validators. Limited trials were carried out on eight subjects, and more extensive trials were carried out on 32 subjects at Madrasah Aliyah Negeri Yogyakarta III using a one-group pretest-posttest design. The results of the study have shown that the product development Education Unit Level Curriculum version lesson plans, 2013 Curriculum version lesson plans, Project-Based Student Books and project appraisal sheets) are feasible. This use can improve scientific skills in learning but cannot significantly improve the test subjects' cognitive aspects' learning outcomes. Thus, Project-Based Student Books can be used as a learning medium by the teacher. However, it needs further improvement and research in order to improve scientific skills in learning.