bluuebunny/crossref_metadata_2025_split huggingface dataset:
The role of local plastic deformation in the formation of structure and properties of materials under extreme heating
Authors: Brover A V , Brover G I , Moysova O B 
Published: December 2019

Abstract
Based on the physical processes analysis in the areas of pulsed laser applied on metals, the research reveals the peculiarities in self-organization of the structure, which leads to the formation of non-trivial properties of surface layers. Structural features of the hardening process during high-speed laser processing depend on the resulting level of strains in the processing zones, that is, on the ratio of plastic deformation processes during heating under the influence of thermal and phase strains and energy dissipation by polygonization and recrystallization. As a result, the effect of material strengthening is achieved not only by martensitic transformation, microchemical heterogeneity, but also by high-temperature riveting, increasing the density of crystal structure defects, plastic shifts under the strain of different nature.
Conditions and mechanisms of the defects formation in vacuum ion-plasma coatings
Authors: Varavka V N , Kudryakov O V , Zabiyaka I Yu , Shvedchikova O V , Yadrets E A 
Published: December 2019

Abstract
The results of studies of various structural features of vacuum ion-plasma PVD-coatings qualified by the authors as coating defects, are presented. Defects include a large volume of porosity, deformation of crystallites, exfoliation, etc. The systematization of defects is presented, depending on the nature of their nucleation (droplet, substructural, and growth defects) and on the character of their distribution in the coating (regular and stochastic). Coatings of various chemical composition were obtained by the method of ion-plasma deposition using both arc and magnetron evaporators. Experimental results are presented, the main array of which was obtained using a double-beam (ion / electron) electron microscope. A separate study on specific substructural defects was conducted. Statistical data on their geometrical dimensions and distribution in coatings is presented. Defects of this type have micron sizes (up to 5 μm in diameter) and a cylindrical shape with an axis perpendicular to the surface of the coating. A hypothesis about the dislocation mechanism of their nucleation on screw dislocations and the spiral mechanism of their growth has been put forward and substantiated.
Modernized RC4 encryption algorithm
Authors: Semenov V , Makov S , Grinev I 
Published: December 2019

Abstract
A modernized RC4 encryption algorithm with implementation of the resulting algorithm in program for encrypting files is proposed. The program has simple and intuitive interface Testing showed that the modernized encryption algorithm is slower for 4 milliseconds than the standard RC4, which is explained by a more complex key expansion algorithm. Proposed algorithm can replace RC4 without substantial loss in file encryption.
A mathematical model of switched-reluctance motor drive for electrical spindle in synthetic yarn machine
Authors: Kolpakhchyan P , Kochin A , Lobov B , Peregudov O 
Published: December 2019

Abstract
The article deals with the modeling of switched-reluctance drive motor for electrical spindle in synthetic yarn machine. We propose to use the backward differentiation formula to solve a system of algebraic-differential equations that governs electromagnetic processes in switched-reluctance electrical machine. The considered approach allows us to avoid the use of numerical differentiation of current and turning angle dependence of the phase flux linkage. As a result, the mathematical model does not significantly depends on basic data and has good convergence. This article shows the switched-reluctance electrical machine modeling. The use of method proves the correctness of the chosen approach
Probabilistic-entropy approach to ensure the operational reliability of the seaport berth elec-trical contact bollards
Authors: Lobov B , Kolpakhchyan P , Litskevich S 
Published: December 2019

Abstract
Reliability analysis of the gradual failure of high current contacts connecting the con-veying units with the seaport power supply electrical network is largely based on deterministic ideas about their degradation. The use the seaport contact electrical equipment indicates the limitations and inaccuracies of such an approach. The long-term studies show that the high marine humidity, turbulent air moisture with aggressive chemical compounds play a substantial role in the wear and tear of electric contacts of seaport berth electrical bollards. The impact of these factors leads to the occasional wear of electric contacts. Thus, we need adequate mathematical apparatus of probability theory and random processes for the reliable results.
Model and numerical experiment for calculating the theoretical current-voltage characteristic in electro-membrane systems
Authors: Urtenov M Kh , Kovalenko A V , Sukhinov A I , Chubyr N O , Gudza V A 
Published: December 2019

AbstractThis work is devoted to problems of numerical calculation of the theoretical current-voltage characteristics (CVC) and galvanography of electromembrane systems in the potentiometric mode. The purpose of this work is the derivation of the formula for calculating the CVC and galvanography of electromembrane systems in the potentiometric mode, which allows calculating stable relative to random errors and rounding errors in over-limiting current densities. To use the formulas, it is necessary to create a mathematical model for calculating the local current density. In this paper, as this model model is used transport of ions in binary salt in the desalination channel, taking into account electroconvection. The electromembrane systems have been used for water medium preparing in mobile mini systems for generating heat and electrical energy as well as vapour producing. The quality of clean water influences on reliability and life time of these systems, including vapour generator and dam-vapour turbine. The obtained formula in the form of a double integral of the local current density is derived, which allows calculating them steadily with respect to random errors and rounding errors. The formulas allowing considering CVC stably with respect to random errors and rounding errors are obtained, and the physical meaning of these formulas is clarified. The calculation of the theoretical CVC with the use of a mathematical model of ion transfer binary salts given electroconvection and shows that it qualitatively coincides with the experimental current-voltage curves. The quantitative difference can be explained by the fact that the mathematical model does not take into account the reaction of water dissociation / recombination, gravitational convection and other transport mechanisms.
Substantiation of parameters of the heat-shielding product for disabled people by using the system analysis and alternative synthesis
Authors: Babenko L G , Molev M D , Mikhailov A B , Savelyeva N Yu 
Published: December 2019

Abstract
The article deals with topical issues of the development theory of heat-protective clothing for people with limited moving capabilities. In particular, the results of the study based on of the interaction of elements in the dynamic system «man – environment – heat protection product» are presented. The aim of the work was the scientific substantiation of heat-protective clothing parameters by means of using the author’s model of the thermal state of the human lower limbs. The relevance of research work is due to the increased need for special heat-shielding products and insufficient knowledge of thermal processes in space and time. At the same time, the main difference of the proposed methodology is the solution of the problem within the framework of the analysis of the interaction of the human lower limbs and the product. In the process of solving the problem, the analysis of scientific publications and experimental results of the research conducted by the authors was carried out. At the same time to obtain complete and objective information, modern methods of mathematics and prognostics, including system analysis, alternatives synthesis, modeling and mathematical statistics are used. As part of the research work, an algorithm for evaluating the interaction of the elements of the «human – environment – heat-resistant product» system was substantiated and a model for predicting the thermal state of the human lower limbs was developed. As a result, temperature criteria were determined for the package of materials of an adaptation bag for people with limited moving capabilities. Scientific development has got experimental verification, which showed the effectiveness of the idea underlying the design. The obtained results represent a scientifically based and technically feasible method of selecting parameters and materials of a heat-shielding product. The implementation of the outlined development will contribute to improving the life quality of people with disabilities.
Modeling of competition between agents of the same level in a multi-level system with information asymmetry
Authors: Gurtuev A , Dovletmurzaeva M , Chazhaev M 
Published: December 2019

Abstract
We propose a game-theoretic model of resource-based competition between agents of the same level in a multi-level system with information asymmetry. It is shown that under conditions of uncertainty, the optimism of agents leads to non-optimal solutions and an increase in the loss of the total added value in the system due to resource waste. The mechanisms of optimistic shifts in agent estimates and agent’s Bayesian adjustment are described. Equilibrium conditions are obtained in the proposed model.
Some specifics of modeling multi-level agent systems with uncertainty using Groves mechanisms
Authors: Gurtuev A , Dovletmurzaeva M , Yalmaev R 
Published: December 2019

Abstract
Uncertainty is often named among the most significant factors impeding decision making in systems with partially independent agents, both technical and social. Among such systems, multilevel systems can be distinguished as a hard case, as uncertainty problem there is combined with the problem of agent opportunism. A special class of mechanisms — the Groves mechanisms that satisfy the requirements of truthfulness in dominant strategies and efficiency — has been well studied in the literature. The article shows how, under conditions of multilevel multi-agent systems with uncertainty, the implementation of Groves mechanisms can solve the problem of systematic distortion of the agents behaviour.
Development of a new method of management of ergo-technical system on the basis of its dynamics monitoring
Authors: Kramarov S O , Groshev A R , Khramov V V , Belyaev A V 
Published: December 2019

Abstract
This paper explores the state assessment and management of complex human-machine systems that ensure that results are quickly obtained with the desired accuracy. The problem is solved by monitoring the real parameters of the process and comparing them with the results of the simulation, taking into account their fuzziness, incompleteness and lack of definition. The proposed method of solving control problems can be used in a number of subject areas (robotics, aero-space monitoring, etc.).
Geometric conditions of mathematical modeling of human heat exchange processes with the environment for CAD systems creating heat-shielding clothing
Authors: Cherunova I , Tashpulatov S , Davydova Yu 
Published: December 2019

Abstract
In the article research results are presented, which aim to provide of automation algorithm mathematical model of designing technology clothing of the cold protection. The method of calculating heat transfer in the &quot;human - environment&quot; system takes into account the variable thermal parameters and the geometric dimensions of the elements, the presence of internal heat sources and convective heat transfer with the heat-carrier flow along the layers and between the calculated elements . Then the problem is reduced to a one-dimensional heat conduction problem with a variable thermal conductivity coefficient. When modeling a human body, we assume that each element of the model is represented as a set of elliptical cylinders forming the inner layers. Four main concepts of the geometric representation of the outer and inner solutions of the human body model have been developed to simulate the problems of human heat exchange with the environment. An algorithm is proposed for determining the type and structure of a mathematical model for use in CAD systems of protective clothing designing. The research was made in Don State Technical University within the framework of State Assignment of the Ministry of education and science of Russia under the project 11.9194.2017/BCh.
Multi-View Images Fusion Model
Authors: Zhdanova M M , Voronin V V , Sizyakin R A , Minkin M S , Zelensky A A 
Published: December 2019

Abstract
The tasks of recognition actions and classification objects are fundamental in computer vision systems. Even subtasks, such as recognition of atomic motion and single objects form the basis for understanding the situation in the work area and the scene in general. This is especially important in video surveillance systems designed to ensure security. Thus, the effectiveness of recognition and classification methods is one of the primary tasks of computer vision. But the visual methods implemented in similar video surveillance systems, encounter some difficulties, such as inhomogeneous background, uncontrolled operating environments, irregular illumination, etc. To address these drawbacks, the paper presents a model for combining visible range images and depth images. This model allows to improve the quality of recognized images, provides the construction of a more informative descriptor, which also positively affects the recognition efficiency. Our results show that it has good performance in fusion visible image and depth map.
Mathematical Modeling of the Image Processing in Television Systems
Authors: Bezuglov D A , Voronin V V 
Published: December 2019

Abstract
Modern vision systems include a television image processing system. Improving the technical characteristics and expanding the capabilities of modern devices for recording television images makes it necessary to develop and create highly efficient algorithms for processing television images. Such systems process large amounts of information, therefore, the requirements for the reliability of processing large amounts of data at limited time intervals are constantly increasing. The rapid development of high-performance computing systems has recently created the conditions for expanding the range of tasks that can be solved with the help of vision systems. The research for improving the efficiency of methods and algorithms for digital image processing significant. Currently, the processing of television images is divided into several steps. The first step is the formation of a digital representation of the image (discretization, quantization and input of the image into the computer memory). The second step is the pre-processing of images (restoration and filtering). The third step is the formation of a graphic preparation of the image (segmentation and contour detection). One of the most complex and relevant is the scientific and technical task of the contour detections of objects in television images on the background with additive noise. The purpose of this study is the development of the contour detection method on the image with impulse noise using mathematical modeling.
Solving the problem transform of size images on series base points found on frames in the problem of stitching images
Authors: Semenishchev E , Shraifel I , Voronin V , Nadykto A , Marchuk V 
Published: December 2019

Abstract
Stitching several images into a single content is an important task for many areas, including video analytics, machine vision, security, etc. The operation of combining is based on the solution of a number of operations related to the allocation of local features, the selection of transformation matrices of objects, changing the scale and saturation of the image. The process fixing frames is he’s with a number of difficulties, includes the appearance of a noise component in the image, blurring, various non-linear effects of the optical system, as well as problems associated with incorrect operation of data preprocessing software. To select the key points used as alignment points is a complex problem, the solution of which is the subject of many works. However, the transformation of coordinate systems of images with combination frames is a difficult problem, since the system is nonlinear.
The article discusses the solution to the problem of changing the position of points in clusters, under conditions of their nonlinearity. The method and algorithm that implements the procedure of nonlinear transformations size over the entire image is presented. Operations include vector analysis, as well as the results of changing the scale of a group of pixels. The set of test data shows the possibility of applying these approaches to change one of the images according to the specified combination points by the operators.
Ways to optimize the prediction of vascular events in patients with acute coronary syndrome and atherosclerotic lesions of the renal arteries
Authors: Kobzeva N , Terentev V , Zolotuhina I 
Published: December 2019

Abstract
Using the logistic regression equations obtained during the work, forecast tables were developed to assess the risk of developing vascular events in the long term. The proposed forecasting model is an independent method for assessing the risk of fatal and non-fatal vascular events. The consistency of the model has a scientific and practical justification. The proposed original risk model can be used in a comprehensive examination of patients with acute coronary syndrome and atherosclerotic lesions of the renal arteries.
The use of blockchain to support sustainable supply chain strategy
Authors: Parung J 
Published: December 2019

Abstract
This paper aims to identify, and analyze how the use of blockchains technology can support sustainable supply chain management strategies. This support is seen from environmental, economic, and social aspects. In addition, it explains the various advantages of using Blokchain technology to reduce the use of transportation and other resources that have the potential to damage the environment. From an economic aspect, this technology has the potential to increase the efficiency of cost and time. Blockchain technology also has the potential to provide social benefits for the companies involved because of the increasingly good reputation of the organization. Three examples of implementation of the blockchain in three different industries are also provided in this paper. This paper also points out the potential disadvantages of using this technology for supply chains that can threaten supply chain sustainability.
Xylanase production from combined Reutealis trisperma with potato dextrose broth by Tricodherma reesei: the effect of pretreatment
Authors: Agustin Y E , Riadi L , Utami T P 
Published: December 2019

Abstract
Xylanase is an important enzyme in pulp and paper, food, feed, and textile industries. It is produced by fermentation process with Tricodherma reesei as fungi, which grows on several carbon sources such as cellulose and xylan. Reutealis trisperma (kemiri sunan) have been used for biodiesel production after being mechanically pressed. The solid waste, which is called Reutealis trisperma cake (RTC) contains carbon and nitrogen sources which are valuable to be used for xylanase production by T. reesei. Shake flask systems were used to grow T. reesei in medium consists of RTC and Potato Dextrose Broth (PDB). The systems were maintained at 28°C, 200 rpm at initial pH of 6.0 for 84 hours. Two forms RTC used in this study were natural and alkaline pretreated. The RTC fermentations were performed for different concentration of PDB (15g/L and 20 g/L) and also for different concentration of RTC (13.33 g/L; 16.67 g/L and 20 g/L). Pretreated systems gave better yield of xylanase production compared to natural systems. Higher concentration of PDB for pretreated system was found to yield lower xylanase production. The highest xylanase activity (198.1 U/mL) was obtained in media containing 15 g/L PDB and 20 g/L pretreated RTC.
The solubility correlation of azobenzene derivatives in supercritical carbon dioxide: a short review
Authors: Alwi R S , Iryani A S 
Published: December 2019

Abstract
This short review highlights the solubility and correlation of four azobenzene derivatives, which have similar chemical structures, available in the literature. At the same phase equilibrium (at the temperature of 353.15 K), the solubilities of four azobenzene derivatives in supercritical carbon dioxide followed in the order of Disperse Red 82 > Disperse Red 13 > Disperse Blue 79:1 > Disperse Red 1. Five different kinds of density-based models were used to correlate the solubility data. Moreover, the solubilities of four azobenzene derivatives were also correlated thermodynamically by the model of the regular solution with the Flory–Huggins theory. It was found the Sung-Shim model (four parameters) has the lowest median AARD of 12.02 % of the solubility data over the entire conditions.
Formulation and characterization of chitosan-alginate freeze dried matrices loaded with oleoresin extract of red ginger
Authors: Krisanti E A , Safiya A , Mulia K 
Published: December 2019

Abstract
A simple method of encapsulation of bioactive compounds that does not involve washing, heating, and degradation of active substance is desired. The encapsulation of red ginger oleoresin in the chitosan-alginate matrix was developed using the freeze drying method to achieve higher matrix yield and loading capacity in the matrix. Bioactive substances that are encapsulated in the chitosan-alginate matrix aim to be released in the colon. Oleoresin red ginger extract was obtained from maceration of dried rhizome powder in ethanol. A mixed solution consisting of chitosan, oleoresin extract, Tween 80 as a surfactant and alginate was lyophilized at -50 C at a vacuum pressure of about 20 atm for 48-72 hours. The X-ray diffraction pattern of the formed matrix shows that the crystalline chitosan and alginate peaks disappear in the chitosan-alginate matrix which shows compatibility. In the Infra Red matrix spectrum the interaction between chitosan and alginate in the matrix is shown by the change of peak height at 1520 and 1385 cm−1. Release assay showed that the matrix with a weight ratio of chitosan: alginate of 1: 0.5 slightly released phenolic compounds from oleoresin in the simulated gastric fluid but highly released in the simulated intestinal and colon fluids.
Preparation and characterization of polyvinyl alcohol-chitosan-tripolyphosphate hydrogel for extended release of anti-tuberculosis drugs
Authors: Mulia K , Chadarwati S A , Rahyussalim A J , Krisanti E A 
Published: December 2019

Abstract
Polyvinyl alcohol (PVA)-chitosan-tripolyphosphate hydrogels were prepared using a solvent casting-evaporation method to obtain anti-TB drugs extended release formulations. X-ray diffraction and scanning electron microscope results indicated that chitosan reduced the crystallinity of PVA hydrogels and the polymers formed homogeneous mixtures. The added chitosan reduced the encapsulation efficiency, and, the rate of drug release. The profile release of the four drugs indicated that the formulation of 80% PVA-20% chitosan hydrogel matrix had the highest drug release rate in a short period of time in phosphate buffer solution of pH 7.4. The maximum drug loading efficiency was obtained in a matrix formulation contain only PVA, while the addition of sodium tripolyphosphate increased the drug loading efficiency and also reduced the amount of drug released. The hydrogel matrix formulation of PVA-chitosan-tripolyphosphate showed its potential to be used as an extended delivery system for anti-TB drugs.