bluuebunny/crossref_metadata_2025 huggingface dataset:
DEVELOPMENT OF PROPOSALS FOR SELECTING AN ENSEMBLE OF BROADBAND SIGNALS SATELLITE COMMUNICATION SYSTEMS WITH MULTI-STATION ACCESS AND CODE DIVISION OF CHANNALS
Authors:   Bauman Moscow state technical university, Filatov Vladimir I. , Julego Vitaly A. ,   The Military Academy of Strategic Rocket Troops after Peter the Great, Balakirev Valery U. ,   The Military Academy of Strategic Rocket Troops after Peter the Great, Ushakov Sergey S. ,   The Military Academy of Strategic Rocket Troops after Peter the Great
Published: October 2021

When designing satellite communication lines and calculating service areas, any unfavorable combinations of signal propagation conditions are taken into account, which, during operation of the repeater, leads to a significant underestimation of the calculated signal level in comparison with the actually provided one. Under these conditions, control of the compliance of the declared characteristics with the real level of the power flux density created by the satellite repeater at the earth’s surface in order to ensure electromagnetic compatibility is the most priority task. When conducting radio monitoring of satellite communication lines using active diagnostic methods, it is necessary to rationally determine the parameters of diagnostic signals so that they meet the conflicting requirements for their confident reception after being relayed by a satellite without disrupting (reducing the capacity) of the functioning of satellite communication lines. Mathematical modeling of the retransmission path of diagnostic signals in the multi-station repeater mode, taking into account the relative spatial location of the satellite, the service area and the radio monitoring station, has been carried out. The model takes into account most of the known factors and features of the propagation of radio signals in satellite communication lines in relation to various statistical phenomena in the atmosphere (refraction, signal depolarization), as well as the instability of the position of the satellite in orbit and the associated variability of the boundaries of the coverage area. As a result of the simulation, it was concluded that under conditions of a priori uncertainty about the polarization parameters used on board the monitored satellite of the antennas, there is a fundamental possibility of active diagnostics of the repeater shafts without weakening the diagnostic signal due to polarization mismatch.
THE PROBLEM OF PROJECT MANAGEMENT AS A SOCIO-ECONOMIC SYSTEM
Authors:   Bryansk State Technical University, Bannikov Artur I.
Published: October 2021

In the article, the author considers project management as a socio-economic system, which has characteristics that are different from other projects. The definition of project management and its essence as a socio-economic system are revealed. The main problems that arise in project management are highlighted, and solutions are proposed that will effectively implement this process. The article provides an overview of the role of educational programs in the development of the competence of professionals in the field of project management. The problems facing project management training and possible solutions are considered, and current trends in project management training are considered.
MATHEMATICAL MODELS AND RECOGNITION METHODS FOR MOBILE SUBSCRIBERS MUTUAL PLACEMENT
Authors:   Moscow Technical University of Communications and Informatics, Ziyadinov Vadim V. , Tereshonok Maxim V. ,   Moscow Technical University of Communications and Informatics
Published: October 2021

The challenge of mobile subscribers’ groups and crowd’s behavior prediction during the mass events is now increasingly important. Operative methods application of this task solution is difficult; accordingly, development and application of technical methods is necessary. The method of this problem solution consists of subscribers’ telephone conversations recording in a zone of mass action, and the following speech recognition, the semantic analysis and statistical processing application. However, there is a tendency demand decrease for mobile systems voice services with simultaneous demand growth for data traffic nowadays. The purpose of this paper is to create a mathematical model of mobile networks subscribers’ mutual placement types, applicable for automatization of the subscribers’ activities nature prediction systems. The research method consists of mathematical simulation model development for pseudo-random examples generation of subscribers’ mutual placement types set, creation of training dataset, convolution neural network training and usage of training results to recognize the new examples. The results obtained. A mathematical model is proposed allowing to create a representative training and validation dataset of mobile networks subscribers’ mutual placement types for neural network training and testing. The convolution neural network trained using these samples has shown high classification accuracy results with a wide class of subscribers’ mutual placement types.
OPTIMIZATION OF THE STRUCTURE OF A MULTI-FREQUENCY MODEM
Authors:   Moscow Technical University of Communications and Iinformatics, Alyoshintsev Andrey V.
Published: October 2021

The paper considers the solution to the problem of increasing the spectral efficiency of a digital transmission system with multifrequency modulation and optimal finite signals that do not cause intersymbol interference in various channels of a multifrequency modem. Applying the method of multi-frequency data transmission based on two-dimensional signal processing, high-speed data transmission is organized over frequency-limited communication channels based on wired technologies of the xDSL standard. The well-known and new modem, which is superior in efficiency to similar modems, are presented. In this paper, the modernization of a multifrequency modem with optimal finite signals based on quadrature amplitude modulation (QAM) is considered. The peculiarity of this structure is as follows: the use of new, synthesized optimal finite OFS-2 signals with increased noise immunity; in the application of the new structure of the multi-frequency modem MFM3; in the use of a frequency-limited GCS in the UEP DCS at the reception in order to compensate for the amplitude and phase distortions introduced by it. Comparative results of calculations of the spectral-energy efficiency of the considered multi-frequency modulated modem MFM3 with OFS-2 and narrow-band subcarriers are illustrated by the graphs in Fig. and presented in Table . Implementation of the new modem in digital telecommunications systems will significantly increase their spectral efficiency. The proposed approach can be used to organize high-speed data transmission over frequency-limited communication channels based on wired technologies of the xDSL standard. For the first time, an adaptive multi-channel digital transmission system with a new multi-frequency modem and new optimal second-type finite signals with increased spectral and energy efficiency has been developed, taking into account optimal estimates of the parameters of the direct communication channel transmitted via the feedback channel and used both in transmission (in the modulator) and reception (in the demodulator).
CONSTRUCTION OF EXPERT-STATISTICAL MODELS FROM INCOMPLETE DATA
Authors:   Irkutsk State Transport University, Noskov Sergey I.
Published: October 2021

The article deals with the problem of constructing a linear regression model based on incomplete data containing gaps, using statistical and expert information. The reasons for the gaps in the data can be, in particular, a temporary malfunction (failure) of the measuring equipment when taking various technical characteristics, or negligence in the work of statistical services when fixing the reporting indicators. Very often, gaps arise when processing various kinds of sociological information in the form of questionnaires, when respondents refuse to answer a specific question (but answer others) or give an inadmissible, in particular, evasive answer. The approach proposed in the work involves filling the gaps with intervals, the boundaries of which are formed by experts, guided by both their experience and knowledge about the object of research, and using the well-known methods of point filling in the gaps. After that, the estimation of the parameters of the model, depending on the nature of the initial uncertainty in the data, is reduced to solving problems of linear or partially Boolean linear programming. The case is considered when the solution of the formalizing uncertainty in the initial data of the interval system of linear algebraic equations is not unique. The problem of constructing a linear regression equation for the influence of the volume of export of large-tonnage containers and the freight turnover of the PRC railway transport on the volume of import of large-capacity containers at the Zabaikalsk-Manchuria railway checkpoint is solved.
NCREASING IMMUNITY OF DECAMETER RADIO CHANNEL TRANSMISSIONS UNDER UNINTENDED INTERFERENCE
Authors:   Saint Petersburg State University of Aerospace Instrumentation, Dvornikov Sergey V. , Markov Evgeniy V. ,   Military academy of communications named after Marshal of the Soviet Union S.M. Budyonny, Manoshi Adjan A. ,   Military academy of communications named after Marshal of the Soviet Union S.M. Budyonny
Published: October 2021

The transmission of messages is a complex process, which is largely determined by the properties of the radio channel used. Decameter radio channels are the most difficult for organizing communication, since the ionospheric propagation of radio waves is associated with their significant attenuation, due to the significant length of the paths, as well as the presence of Rayleigh fading in the channel. However, the possibility of transmitting information over long distances without serious resource costs stimulates further research to improve the reliability of decameter radio communication. In this paper, we investigate the possibility of increasing the noise immunity of frequency-shift keying transmissions of decameter radio channels in conditions of unintentional interference due to the use of broadband signals. An analytical expression of the dependence of the probability of a bit error on the level of the ratio of the peak signal power to the peak interference power is considered; a graph of this dependence is presented. It is shown that the plot is consistent with the overall noise immunity estimate for Rayleigh fading channels using double FSK signals. The rationality of methods for obtaining the required reception quality in decameter radio channels is analyzed. It is shown that the most rational direction for increasing the noise immunity of FM-2 transmissions in decameter radio channels with Rayleigh fading in conditions of unintended interference is the use of broadband signals. In this case, for expansion, it is advisable to choose a value kf = 7, which makes it possible to increase the noise immunity by 9 dB. The conclusions are illustrated by graphs.
EVALUATION OF THE EFFECT OF TRAIN DRIVING ON THE EXTENDED ARM OF LOCOMOTIVE CREWS ON THE OPERATIONAL WORK OF THE STATION
Authors:   Irkutsk State Transport University (IrGUPS), Malovetskaya Ekaterina V. , Kozlovsky Alexey P. ,   Center for Simulation Modeling, JSC NIIAS
Published: October 2021

The presented work considers the method of qualitative evaluation of the change in the technological process of the Eastern landfill from the position of the railway station on the basis of simulation modeling of its work. As a proposed change in the landfill operation technology, the freight train traction service system on the Mezhdurechensk-Karymskaya traction arm was considered, which implies passing trains without stopping at Nizhneudinsk station instead of changing the locomotive and locomotive crews. Digital models of the station, formed using ISUZHT TS software (system of analysis, modeling and optimization of the station operation technology) of JSC NIIAS, became a tool for assessing the proposed traction maintenance technology and the impact on the operational performance of Nizhneudinsk station. Two digital models have been developed. On the basis of each of the digital models, a simulation study (simulation) of the operation of the station in a two-day period was carried out. Qualitative and quantitative parameters of operation of the station for each digital model are compared with each other. A cost estimate of the change in the landfill operation technology in the railway station section is given based on the economic expression of the change in the qualitative parameters of the work. The technology of organizing traction services on the traction arm Mezhdurechensk – Karymskaya made it possible to reduce the downtime of freight cars (without processing) at the station as part of transit trains by 10%, as well as reduce overhead times for locomotive crews and the average turnover time of a train locomotive at the station.
TECHNOLOGICAL MODEL AND SUSTAINABILITY ASSESSMENT METHODOLOGY OF THE MULTISERVICE COMMUNICATION NETWORK FUNCTIONING
Authors:   Institute for Networking Technology, Kudelya Viktor N. , Gel Valentine E. ,   Military Academy of Communications, Vovk Valeriy V. ,   General Directorate of communications
Published: October 2021

The modern development of multiservice communication networks (MÑN) is characterized by the desire of operators to provide users with an unlimited range of services with guaranteed quality of service (QoS). QoS is determined by the stability of the network’s functioning, that is, its ability to function without errors. The existing routing algorithms in modern networks focus the main load on the most productive sections, while the rest of the network is used quite poorly. This is confirmed by the results of studies [1,2], in which the structure of modern global communication networks is assigned to the class of small-world graphs. Obviously, that the increased connectivity of such networks determines high indicators of its stability, but at the same time, this route redundancy is poorly used by existing routing protocols to provide QoS when transmitting different traffic (triple-play: audio, video, and data) [3, 4]. There is also no work devoted to the analysis of the possibilities of sharing different routes (route parallelism) for the implementation of QoS enhancement mechanisms in the MÑN. This article discusses the technological concept of a network with route parallelism in communication networks built on the basis of the IP protocol family.
Technical principles for creating a wireless local network Wi-Fi
Authors:   Kazan National Research Technological University, Sharifullina Albina Y. , Galyamov Roman R. ,   Kazan National Research Technological University, Zaripova Rimma S. ,   Kazan National Research Technological University
Published: October 2021

This article discusses the stages of development, characteristics of a wireless local area network Wi-Fi, options for its topology and equipment used. Currently, there are such different types of wireless networks as Wireless Wide Area Network, Wireless Metropolitan Area Networks (Wireless Neighborhood Area Network), Wireless Local Area Network, Wireless Personal Area Network. Each of the listed wireless networks has its own specific range and application. Wireless LAN Wi-Fi refers to the Wireless Local Area Network. The first wireless LAN standard, Wi-Fi, was approved in 1997. From the moment of their appearance to the present day, the following standards of this network have appeared: 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac, 802.11ad, 802.11ax. For each standard, the speeds and frequency ranges at which the data transmission was carried out are indicated, and the technologies on which they are built are described. Wireless LAN Wi-Fi has three topologies: 1) Ad-Hoc (point-to-point) or Independent Basic Service Set; 2) Basic Service Set ("client / server") and 3) Extended Service Set ("extended service areas"). To build a Wi-Fi network, network adapters, access points, routers, ADSL modems, Wi-Fi phones, Wi-Fi antennas, Wi-Fi repeaters are used. Wi-Fi adapters are used by devices that do not have a built-in Wi-Fi module. Wi-Fi access points are designed for organizing wireless access within a local network. Wi-Fi routers are designed to route traffic on a computer network. ADSL modems are used to access the Internet over a telephone line. Wi-Fi repeaters are used to expand the coverage of a wireless network using already installed equipment. Wi-Fi phones are wireless IP phones. Wi-Fi antennas are used to extend the range of a wireless network.
Confirmation of ADS-B data in the aerodrome traffic zone by gating method
Authors:   Arkhangelsk air traffic management center, North-West Air Navigation branch, State Air Traffic Management Corporation of the Russian Federation, Kalintsev Andrey S. , Rubtsov Evgeny A. ,   Saint Petersburg State University of Civil Aviation, Plyasovskih Alexandr P. ,   All-Russian scientific research institute of radio equipment (JSC VNIIRA)
Published: October 2021

The low cost of ADS-B stations in comparison with radars and multi-position surveillance systems allows to consider them as promising means, including for the airfield zone. However, at present, the ICAO does not recommend the use of the ADS-B as the main means of observation, since confirmation of the accuracy of the received coordinate information is required. The article presents a method of algorithmic confirmation of the ADS-B data, while providing flights in the aerodrome traffic zone. It is suggested to use method of the gating to estimate the fidelity of the ADS-B data by selecting the area of space around he extrapolated coordinate of the aircraft. According to the required flight procedure, request of the enhanced surveillance a Mode S is transmitted to the aircraft. On the coordinates of assigned track, according to the maneuvering scheme, aircraft trajectory is built, relative to which the calculation of location errors is performed. Estimation of the mathematical expectation and the mean square deviation of the location error is performed for different levels of reliability. Based on the size of the gate area, a check is performed for compliance of the obtained interval estimates with the data validity condition. The check is performed sequentially for reliability levels 0.9, 0.95, and 0.999. On exit the values of estimate of the error beyond the limit of tolerance for a target level of reliability, information about the unreliability of the received data is displayed, which allows to detect large deviations of the measured coordinates for a smaller number of observations. When performing imitation modelling for the obtained data were set various inaccuracy values: the mathematical expectation from 10 to 48 m and the mean square deviation from 20 to 100 m. The error estimation for the reliability level of 0.999 required from 5 to 22 observations, which corresponds to a time interval of 3 to 11 s real time. At values systematic error of 10 m and mean square deviation of 70 m, the accepted coordinates will be identified as untrusted and will display the information on prohibiting the use of ADS-B and necessary to use other surveillance equipment.
Segment routing as a basis for software defined network
Authors:   MTUCI, Kalmykov Nikita S. , Dokuchaev Vladimir A. ,   MTUCI
Published: October 2021

In this article the structure, main components and functioning of Segment Routing (SR) are analyzed. Segment routing is a WAN traffic routing technique existing on MPLS and only-BGP networks. Segment routing is also considered as a way of improving the infrastructure performance and efficiency. The main advantages of SR are achieved through the implementation of the SDN concept approach, without changing the standard data transferring plane for each of the technologies, above which SR can be applied. The article also covers the main areas of SR technology application, interaction in a centralized and decentralized network. The article provides the examples of controllers for SDN implementation using SR. The presence of a controller in the network permits the realization of bandwidth on demand, traffic prioritize, selection of the most suitable route in the network for different types of traffic easier and more often without any protocols or devices. Another important advantage of controller's implementation on networks using SR can be a reduction of the services recovery time after a failure, because the route will be rebuilt faster (compared to MPLS). SR can be considered as an opportunity to refuse from such protocols as LDP or RSVP for situation when used on a network in tandem with a controller. IPv6 networks, using SR, are able to acquire additional capabilities in programmability and flexibility.
Selection of the operating frequency of the hydroacoustic system for reducing the underwater vehicle to the door module and proposals for the choice of its structure
Authors:   Novosibirsk State Technical University, Filippov Boris I.
Published: October 2021

The proposed work is a continuation (the second part) of the overall work on the development of the structure of the hydroacoustic navigation system (HNST) for bringing the autonomous underwater vehicle (AUV) to the docking module (DM). The first part was published in the previous issue of the magazine. The purpose of this is to develop and study a prototype of the equipment for a short-range high-frequency HNST to ensure the docking of AUV with a carrier. The expediency of constructing the equipment of a high-frequency hydroacoustic system for bringing the AUV to DM in the form of a combined information and navigation system combined on the basis has been substantiated. It can use hydroacoustic navigation systems with short and ultrashort antenna bases; it is proposed to use data signals as navigation signals, which are exchanged between the docking module and the autonomous underwater vehicle based on the results of measuring the mutual navigation characteristics. It is recommended to select the operating frequency in the lower part of the allocated frequency range 100 –: 200 kHz. It should be considered that the accuracy of determining the position of the AUV in the process of alignment can be a variable value: with an increase in the distance to the DM, the errors in estimating the spatial coordinates of the AUV can increase without compromising the functionality of the alignment system. Therefore, in order to select a scenario for the movement of the AUV in the process of alignment, it would be desirable to know the dependence of the errors in estimating its spatial coordinates, admissible when con-trolling the movement of the AUV, on the distance to the DM. In the absence of the indicated dependence, it is possible to take advantage of the somewhat overestimated requirements for the targeting zone for the estimation of the navigation characteristics of the targeting HNST. Then the alignment strategy can be reduced to the choice of the AUV motion scenario, which provides the maximum required accuracy of the estimation of its spatial coordinates in the entire alignment zone. A variant of building an HNST, consisting of unified basic sets of a docking module (BS – DM) and an underwater vehicle (BS - AUV), has been proposed. The basic set of the (BS – AUV) underwater vehicle is similar in structure and function to the basic set of the docking module. Its difference from the (BS-DM) is in the presence of a control unit for the underwater vehicle (CUV), through which signals are exchanged between the (BS - AUV) and the AUV autopilot.
Feature selection for predicting live migration characteristics of virtual machines
Authors:   MTUCI, Kirov Denis E. , Toutova Natalia V. ,   MTUCI, Vorozhtsov Anatoly S. ,   MTUCI, Andreev Iliya A. ,   MTUCI
Published: October 2021

Virtual machine migration is widely used in cloud data centers to scale and maintain the stability of cloud services. However, the performance metrics of virtual machine (VM) applications during migration that are set in the Service Level Agreements may deteriorate. Before starting a migration, it is necessary to evaluate the migration characteristics that affect the quality of service. These characteristics are the total migration time and virtual machine downtime, which are random variables that depend on a variety of factors. The prediction is based on the VM monitoring data. In this paper, we select the most suitable factors for forecasting five types of migrations: precopy migration, postcopy migration, and modification of precopy migration such as CPU throttling, data compression, and delta compression of modified memory pages. To do this, we analyzed a dataset that includes data on five types of migrations, approximately 8000 records of each type. Using correlation analysis, the factors that mostly affect the total migration time and the VM downtime are chosen. These characteristics are predicted using machine learning methods such as linear regression and the support vector machine. It is shown that the number of factors can be reduced almost twice with the same quality of the forecast. In general, linear regression provides relatively high accuracy in predicting the total migration time and the duration of virtual machine downtime. At the same time, the observed nonlinearity in the correlations shows that it is advisable to use the support vector machine to improve the quality of the forecast.
Queue analysis in the G/G/1 system based on hyperexponential distributions
Authors:   Povolzhskiy State University of Telecommunications and Informatics, Buranova Marina A.
Published: October 2021

For real-time applications, the change in packet delay, which is usually called delay jitter, is one of the most important parameters of quality of service in modern infocommunication networks when processing multimedia streams, along with the delay and the probability of packet loss. This article discusses approaches to assessing jitter in modern infocommunication networks when processing non-Poissonian traffic in the G/G/1 system. To approximate the system of an arbitrary queue G/G/1, a model based on hyperexponential distributions of the type H2/H2/1 was used. As a processed stream, the implementation of IP network traffic with the absence of mutual correlations between the time intervals between packets and the times of packet processing is used. An important task in this case is to determine the parameters of hyperexponential distributions for the time intervals between packets and packet processing times. The paper presents two methods for determining the parameters of hyperexponential distributions: using the method of moments and using the EM-algorithm. The paper analyzes the influence of the network load factor on the jitter value when using two models for determining the parameters of hyperexponential distributions. This analysis showed a slight increase in jitter with increasing network load both in the case of using the method of moments and in the case of the EM algorithm. It has been determined that the estimates of the jitter values in the case of applying the method of moments and the EM algorithm are quite close in value. The main result of the work is to obtain simple calculation formulas for the analysis of jitter in the G/G/1 system using hyperexponential distributions.
Shaping operator technique for modelling cyclostationary random processes
Authors:   Moscow Aviation Institute (National Research University), Shevgunov Timofey Ya.
Published: October 2021

The paper proposes the shaping operator technique for modelling cyclostationary random process (CSRP) which belong to the class of second-order processes being described by the parametric pulse train model. Generating CSRP is expressed as the propagation result of the specially chosen elementary CSRP through the linear time-invariant system with a known impulse response. The paper describes the approach to forming the elementary CSRP based on the train made of Dirac delta-function uniformly following in time domain with constant step and defining the desired structural periodicity of the process being modelled. The analytical expressions for the main characteristics used for describing cyclostationary properties of the elementary process, including two-dimensional, cyclic and spectral corelation functions, were obtained. In addition to the case of the elementary CSRP with correlated weighting coefficients of delta-functions, the case of statistically independent coefficients was considered. It was shown that utilization of the spectral correlation function (SCF) for describing the cyclic property reveals the explicit analytical relation between characteristics of the elementary and modelled CSRPs provided the filter frequency response is known. The paper presents the comparative example which describes the modelling of two CSRPs: one of them was chosen as the train of rectangle pulses which is pulse amplitude modulated by stationary random time series, while the other is considered as a signal formed by the method of direct sequence spread spectrum. The chosen short-length Barker sequence as the code allowed performing visual comparison between absolute value of SCF components taken at the cyclic frequencies multiple of the chip frequency and cyclic frequencies multiple of the symbol frequency. The future development of the methods proposed in the paper opens the road to improving the performance of modern radar and telecommunication systems by means of utilizing cyclic frequencies which are non-random parameters describing the structural properties of signals under processing.
The method and multiple device of a matrix search for simple and complex samples
Authors:   The Southwest State University, Titenko Evgeny A. , Schitov Alexey N. ,   The Southwest State University
Published: October 2021

The research consists in the development of hardware pattern search methods that use the principles of shared access and parallel data processing inherent in associative memory. Reducing the search time is achieved through the formation and parallel processing of a binary (characteristic) matrix of com parisons of pattern symbols and text. A composite pattern has been introduced, it allows flexible description of search terms. The characteristic matrix is in the form of a parallelogram; it consists of rows shifted to the right, starting from the first row. This form allows you to conduct a parallel search for simple and composite patterns on the diagonal elements of the matrix. The developed method supports hardware search in the characteristic matrix. It is distinguished by the simultaneous consideration of local and distributed relationships between the elements of the diagonals and rows of the matrix. Separate calculation of starting values along the diagonals of the matrix allows you to independently search for two types of samples by calculating in the cells of the diagonals of the characteristic matrix of two output search functions. The method has linear time and quadratic hardware complexity. The clock pulse duration is determined by the sum of the delays of the comparison circuit for a pair of symbols, a D-flip-flop and a two-input element I. The homogeneous structure of the matrix search device, the use of standard operations allow the device to be implemented on a promising FPGA element base, which determines its use in high-performance systems for processing and transmitting heterogeneous information.
The architecture of smart home internet of things
Authors:   Moscow Technical University of Communications  and Informatics, Zainal Al namer
Published: October 2021

Modern society lives in the age of high and smart technologies. Innovative technologies are included in every part of our life. Almost all people use the innovations of scientific and technological progress in order to reduce costs, effort and time. Smart technology – a new approach to the organization of its goals, which allows to combine all available information at an early stage, to determine the list of necessary materials, set deadlines for execution of works and perform the task and clear to all participants of the process. Smart Home is a solution in which the operation and control of all systems at the level of an individual household is automated, pro viding a specific room with a high level of security and all the necessary living conditions, while remotely without unnecessary interference from service organizations. The building is equipped with special monitors with sensors that help detect threats to both the system and the residents themselves. One of the popular and developing trends and technologies in the Internet of Things today is "Smart- Home Internet of Things" (smart home of the Internet of Things) – SH-IoTs, which is designed for the most comfortable life of people through the use of modern high-tech means. In the modern concept of the smart home system of the Internet of Things SH-IoTs, as a rule, they invest in the automation of everyday, routine actions. For example, in the event of a fire in a room with special sensors installed, the smart home system will de-energize all electrical appliances in this room, etc.
Development of a multipath routing algorithm in software-defined communication networks
Authors:   National Research University of Electronic Technology, Volkov Alexey S. , Baskakov Aleksandr E. ,   National Research University of Electronic Technology
Published: October 2021

The paper describes the development of routing algorithm in software-defined communication networks using the principle of multipath message delivery. The use of the OpenFlow protocol as the main one for connecting data- and control-plane devices between each other, that is, programmable switches with the controller, allows us to take the network topology presented in undirected weighted graph form as the initial data for the algorithm. There are known solutions to the problem of finding ways to transmit data in a communication network, as a rule, using the network resource reservation protocol, but additional restrictions are imposed on the network, since RSVP has a low degree of scalability, respectively, inappropriate consumption of computing resources and storage system resources of individual routers. In view of the above, an algorithm has been developed for finding a set of paths on a graph with the construction of an auxiliary graph based on the original one. Conditions are given under which an auxiliary graph can be constructed from the initial one. The algorithm takes into account the possibility of constructing several paths passing through one vertex, while meeting the requirements for the delay of the input data stream. To expand the functionality and possible areas of application of the algorithm for finding a set of paths, a criterion for the required total throughput by a set of data transmission paths is introduced. Conditions for constructing paths from a vertex to set of vertices are given. The algorithm presented in the work has an order of magnitude less time complexity, which allows you to quickly respond to changes in the data transmission network, while the most significant differences in the time spent on building a set of paths are noticeable with an increase in nodes in the data transmission network and the number of possible paths.
A model of governance in digital social and economic systems
Authors:   St. Petersburg University of the Ministry of Internal Affairs of Russia, Grachev Mikhail I. , Burlov Vyacheslav G. ,   Peter the Great St. Petersburg Polytechnic University (SPbPU)
Published: October 2021

In the modern world, rapid changes are taking place based on the introduction of modern information technologies, leading to the digitalization of ecosystems, including social and economic systems (SES). Modern web technologies, which represent a huge information system, have an increasing influence on human life. In the course of its functioning, the information environment is exposed to negative influences from outside, with the aim of destructive impact on it. To maintain the goal of functioning of the information component of the system, it is necessary to have a properly constructed system and an adequate model of response to external influences. The SES response model will be based on the consideration of three processes, namely: the problem formation process, the problem identification process, and the problem neutralization (elimination) process. An indicator of the effectiveness of the functioning of ecosystems will be the likelihood that each problem will be identified and neutralized. The simulation results confirm the main directions in the development and functioning of the SES. The need for the development and subsequent application of methods and techniques that allow to achieve the set goal in a shorter time remains relevant and in demand, respectively, they will always be relevant and in demand. For a rational approach to making management decisions, the head responsible for the operation of the SES can use network planning, which will serve as a plan for carrying out the entire cycle of processes for maintaining the information security of the SES as a whole. The presence of a response model for the head of the SES will allow him to use his available resources in a timely manner to counteract disruptions in work and increase the efficiency of managerial decision-making.
A mathematical model of demand management for carsharing
Authors:   Siberian Transport University, Koryagin Mark E. , Izvekov Vladislav S. ,   Siberian Transport University, Katargin Vladimir N. ,   Siberian Transport University
Published: October 2021

A significant increase of carsharing service in Russia and worldwide has led to need a formal description of the process orders fulfilling on the service. The paper presents a mathematical model for computation the distance between customers and free car, which is built on the basis of the "nearest neighbor-method. A model of demand generation is proposed. The demand depends on the potential number of customers and the probability of finding a car in the area of walking distance. The number of free cars is described as stochastic process, which is based on a birth and death process. The death intensity in the process depends on the probability of finding a car. The estimation of the average number of free cars, their average load and the probability of finding a free car in the walking distance are obtained. The combination of the presented models allows to assess the impact of the number of carsharing vehicles on demand. In particular, a numerical example shows that an increase in the carsheribg fleet can lead to increaseasing in the cars average load. Thus, we can conclude that a larger car-sharing project can be cost-effective only if the carsharing service consists of a large fleet of vehicles, i.e. the service contains a high density of free cars.
Processing echo signals reflected from unmanned aerial vehicles and received by radar
Authors:   Peter the Great St. Petersburg Polytechnic University, Petrov Ivan D. , Shkodyrev Viacheslav P. ,   Peter the Great St. Petersburg Polytechnic University
Published: October 2021

In the modern world, with the surge of usage of the unmanned aerial vehicles many tasks related to detection of aerial objects have arisen and also the determination of their type within the cities and the countryside. Such tasks are the recognition and classification of aerial objects using radar stations. Aerial objects that need to be detected usually are unmanned aircraft and birds. Processing the signal received by radar from the aerial object to obtain a proper spectral signature is needed to solve such tasks. The most informative detail for determining the type of the aerial object is the presence or absence of the micro-Doppler effect in the spectral signatures. The perpose of this paper is to carry out and compare two strategies for filtering echo signals from interference and obtaining their spectral signatures. The first strategy involves application of several methods for filtering the echo signal, followed by a standard spectral analysis. The second strategy adds to the previous one the use of an autocorrelation and calculating spectral density. Comparison of the of the applied strategies for processing echo signals from aerial objects showed that the use of the autocorrelation results in a more pronounced, regular and refined spectral signature relative to the first approach with only filtering and spectral analysis. The application of these strategies for processing signals reflected from aerial objects will be used in a future research to design a system with deep integration of the physical and computational components.
New pathogenic species in etiology of dermatophytosis in companion animals in Moscow region
Authors:   Researcher of Laboratory of Mycology and Antibiotics named after A. H. Sarkisov, Federal Scientific Center – All-Russian Research Institute of Experimental Veterinary Medicine named after K. I. Skryabin and Ya. R. Kovalenko of the Russian Academy of Sciences, Moscow, Russian Federation, Savinov V. A. , Ovchinnikov R. S. ,   Candidate of Biological Sciences, Leading Researcher of Laboratory of Mycology and Antibiotics named after A. H. Sarkisov, Federal Scientific Center – All-Russian Research Institute of Experimental Veterinary Medicine named after K. I. Skryabin and Ya. R. Kovalenko of the Russian Academy of Sciences, Moscow, Russian Federation, Yuzhakov A. G. ,   Candidate of Biological Sciences, Head of the laboratory of Biochemistry and Molecular Biology, Federal Scientific Center – All-Russian Research Institute of Experimental Veterinary Medicine named after K. I. Skryabin and Ya. R. Kovalenko of the Russian Academy of Sciences, Moscow, Russian Federation, Khabarova A. V. ,   Laboratory assistant of Laboratory of Mycology and Antibiotics named after A. H. Sarkisov, Federal Scientific Center – All-Russian Research Institute of Experimental Veterinary Medicine named after K. I. Skryabin and Ya. R. Kovalenko of the Russian Academy of Sciences, Moscow, Russian Federation, Gaynullina A. G. ,   Researcher of Laboratory of Mycology and Antibiotics named after A. H. Sarkisov, Federal Scientific Center – All-Russian Research Institute of Experimental Veterinary Medicine named after K. I. Skryabin and Ya. R. Kovalenko of the Russian Academy of Sciences, Moscow, Russian Federation
Published: October 2021

Dermatophytic fungi Nannizzia persicolor, Nannizzia fulva, Trichophyton benhamiae and Microsporum ferrugineum were isolated from pets (cats, dogs, guinea pig) in Moscow region. The species identification was confirmed by ITS sequencing. Their macro- and micromorphological agent of dermatophytosis in companion animals. A considerable phenotypic polymorphism among M canis isolates was revealed, thus obstructing species identification. A wide prevalence of dermatophytosis in companion animals (46%) was shown, with a predominance of the zooanthropophilic species M. canis (95%). This is the first confirmed cases of pet dermatophytosis caused by N. persicolor, N. fulva, T. benhamiae and M. ferrugineum in Russian Federation.
Study of the influence of lyophilization drying on the biological properties of museum strains of esherichia
Authors:   Researcher, Laboratory of Quality and Standardization of Bacterial Medicines, All-Russian State Center for Quality and Standardization of Medicines for Animals and Feed, Moscow, Russian Federation, Galiakbarova A. A. , Pimenov N. V. ,   Doctor of Biological Sciences, Professor of the Russian Academy of Sciences, Moscow State Academy of Veterinary Medicine and Biotechnology – MVA by K. I. Skryabin, Moscow, Russian Federation
Published: October 2021

The paper presents the results of a study of the biological properties of museum strains that are in the All-Russian collection of microorganism strains of the Federal State Budgetary Institution «VGNKI». Strains with the most valuable properties for further work were selected from the collection. Preparation and freeze drying of museum strains was carried out. The biological properties of the strains were studied on bacteriological analyzers before and after freeze drying.
Influence of AH1 fertility haplotype on breeding qualities of Ayrshire bulls
Authors:   Candidate of Agricultural Sciences, Senior Researcher of the Laboratory of Genetics and Breeding of Ayrshire Cattle Russian Research Institute for Farm Animal Genetics and Breeding – Branch of the L. K. Ernst Federal Science Center for Animal Husbandry, Pushkin, Russian Federation, Vasilyeva E. N.
Published: October 2021

In recent years, after the import of cattle and sperm of Ayrshire bulls from abroad, cases of the transfer of the AH1 haplotype carriage to bulls and cows in our herds have been recorded, which can negatively affect at the breeding value of animals. Fertility haplotype AH1 is an autosomal monogenic genetic defect inherited in a recessive manner. Information on the identification of the AH1 fertility haplotype in Ayrshire cattle has become available in foreign scientific sources since 2014. Studies of the influence of the AH1 haplotype on the breeding qualities of the Ayrshire bulls of RF were carried out on 73 tested bulls, of which 16 are carriers of this genetic defect (AH1C), and 57 are free (AH1F). In one-way analysis of variance, it was found that the factor of the carrier status of the fertility haplotype (36,7%) has the greatest influence on the BV of bulls of milk yield, then «the number of male AH1C ancestors in all ranks of the pedigree» – 16,8%, and then the factor «nearest rank of pedigree with a male ancestor АН1С» – 13,9%. It was found that among carriers of AH1 the number of bulls improving milk yield over +100 kg is significantly less compared to the group free from the haplotype (6,3% instead of 40,4%, respectively). The proportion of bulls with BV of milk yield over +100 kg sharply decreases with an increase in the AH1C ancestors from 1 to more than 3, as well as when the first AH1C ancestor approaches the proband. In order to control the spread of the AH1 fertility haplotype, when choosing bulls, it is advisable not to admit male ancestors in their pedigree – carriers of this genetic defect closer to the 4 rank, and also to avoid the accumulation of more than three AH1C males in all ranks of the pedigree.
PENGARUH BAGI HASIL PADA PRODUK TABUNGAN MUDHARABAH TERHADAP MINAT MENABUNG NASABAH DI BANK SYARIAH INDONESIA KCP KM 6 PALEMBANG
Authors: Putricia Siti Novira , Choiriyah Choiriyah , Muharir Muharir
Published: October 2021

In Indonesia, the majority are Muslims, so the demand for banks that operate in accordance with sharia has begun to emerge. This study aims to find out how the effect of profit sharing for mudharabah savings products on the interest in saving customers of Bank Syariah Indonesia Km 6 Palembang. The data collection technique in this study used a questionnaire/questionnaire with a population of several mudharabah savings customers. The research method used is simple regression analysis using SPSS software. The results obtained indicate that the profit sharing variable in the mudharabah savings product has a significant effect on the customer's interest in saving.
PENGARUH PELATIHAN DAN MOTIVASI TERHADAP KINERJA KARYAWAN PADA KOPILOKA 3.0 PALEMBANG TAHUN 2021
Authors: Prasetya N Juni Eliana , Faizal Moh. , Choirunnisak Choirunnisak
Published: October 2021

In this study, there are results that contradict the theory which states that the higher the level of training and motivation, the employee's performance should increase.  In this study, training had no effect and motivation had no positive effect. This study aims to determine the effect of training and work motivation on employee performance in Kopiloka 3.0.  The population in this study were all employees at Kopiloka 3.0, which amounted to 15 people with a sample of 15 people using saturated sampling.  The data analysis technique in this study used SPSS 24 software, which consisted of data quality test, classical assumption test, multiple regression analysis, and hypothesis testing. By using multiple regression analysis, the results of the study show that training has no effect on employee performance.  Motivation has a significant effect on employee performance.  Simultaneously (together) the independent variables of training and motivation have an effect on employee performance.