Subjects -> ELECTRONICS (Total: 209 journals)
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 International Journal of Electronics and TelecommunicationsJournal Prestige (SJR): 0.216 Citation Impact (citeScore): 1Number of Followers: 13     Open Access journal ISSN (Print) 0867-6747 - ISSN (Online) 2300-1933 Published by Polska Akademia Nauk  [10 journals]
• Grid Fault Diagnosis Based on Information Entropy and Multi-source
Information Fusion

• Authors: Xin Zeng, Xingzhong Xiong, Zhongqiang Luo
Pages: 143 - 148
Abstract: In order to solve the problem of misjudgment caused by the traditional power grid fault diagnosis methods, a new fusion diagnosis method is proposed based on the theory of multi-source information fusion. In this method, the fault degree of the power element is deduced by using the Bayesian network. Then, the time-domain singular spectrum entropy, frequency-domain power spectrum entropy and wavelet packet energy spectrum entropy of the electrical signals of each circuit after the failure are extracted, and these three characteristic quantities are taken as the fault support degree of the power components. Finally, the four fault degrees are normalized and classified as four evidence bodies in the D-S evidence theory for multi-feature fusion, which reduces the uncertainty brought by a single feature body. Simulation results show that the proposed method can obtain more reliable diagnosis results compared with the traditional methods.
PubDate: 2021-04-30
Issue No: Vol. 67, No. 2 (2021)

• Miniaturized Wearable Fractal Patch Antenna for Body Area Network
Applications

• Authors: Vikas Jain, Balwinder Singh Dhaliwal
Pages: 149 - 154
Abstract: This article presents the design of a miniaturized wearable patch antenna to be utilized for the body area network (BAN) applications. To reduce the size of the antenna a crown fractal geometry antenna design technique has been adopted, and which resulted in a size reduction of 26.85%. Further, the polyester cloth has been used as the substrate of the antenna to make the proposed antenna a flexible one, and suitable for wearable biomedical devices. The designed antenna functions for the 2.45 GHz ISM band and has the gain and bandwidth of 4.54 dB and 131 MHz respectively, covering the entire ISM band. The antenna characteristics like return loss (S11), directivity and radiation pattern have been simulated and analyzed. Specific absorption rate (SAR) and front to back ratio (FBR) of the proposed antenna at the human body tissue model (HBTM) in the planer and different bending conditions of the antenna have also simulated and analyzed, and the proposed antenna fulfils the desired design standards.
PubDate: 2021-04-30
Issue No: Vol. 67, No. 2 (2021)

• The stability interval of the set of linear system

• Authors: Waldemar Wójcik, Talgat Mazakov, Sholpan Jomartova, Gulzat Ziyatbekova, Nurgul Karymsakova, Aisulu Tursynbai
Pages: 155 - 161
Abstract: The article considers the problem of stability of interval-defined linear systems based on the Hurwitz and Lienard-Shipar interval criteria. Krylov, Leverier, and Leverier-Danilevsky algorithms are implemented for automated construction and analysis of the interval characteristic polynomial. The interval mathematics library was used while developing the software. The stability of the dynamic system described by linear ordinary differential equations is determined and based on the properties of the eigenvalues of the interval characteristic polynomial. On the basis of numerical calculations, the authors compare several methods of constructing the characteristic polynomial. The developed software that implements the introduced interval arithmetic operations can be used in the study of dynamic properties of automatic control systems, energy, economic and other non-linear systems.
PubDate: 2021-04-30
Issue No: Vol. 67, No. 2 (2021)

• Intelligent system in the context of business process modelling

• Authors: Elena M. Kuzmina, Nataliia B. Savina, Konrad Gromaszek, Bakhyt Yeraliyeva, Gauhar Borankulova
Pages: 163 - 168
Abstract: The article deals with the features and characteristics of intelligent systems for modelling business processes. Their classification was made and criteria for comparison were developed. According to the comparative analysis of existing expert systems for intelligent analysis, a reasonable choice of system for modelling business processes of a particular enterprise has been carried out. In general, it was found that the introduction of intelligent systems for modelling business processes of the enterprise and forecasting its activities for future allows management of the company to obtain relevant and necessary information for the adoption of effective management decisions and the development of a strategic plan
PubDate: 2021-04-30
Issue No: Vol. 67, No. 2 (2021)

• Using of entropy at estimation business risks

• Authors: Nataliia B. Savina, Nina V. Slyusarenko, Maryna S. Yakobchuk, Konrad Gromaszek, Saule Smailova, Kuanysh Muslimov
Pages: 169 - 174
Abstract: The possibility and expediency of estimation of risk factors based on fundamental positions of information and entropy are grounded. In accordance with the principle of addiction, the possibility of using the H-criterion as an indicator of business uncertainty is shown. The algorithm of risk estimation of these investments is offered
PubDate: 2021-04-30
Issue No: Vol. 67, No. 2 (2021)

• Efficient Wireless Sensor Network for Radiation Detection in Nuclear Sites

• Authors: Sherief Hashima, Imbaby Ismail Mahmoud
Pages: 175 - 180
PubDate: 2021-04-30
Issue No: Vol. 67, No. 2 (2021)

• Cycles in Bayesian Networks

• Authors: Alexander Litvinenko, Natalya Litvinenko, Orken Mamyrbayev, Waldemar Wójcik, Dusmat Zhamangarin
Pages: 181 - 186
Abstract: The article is devoted to some critical problems of using Bayesian networks for solving practical problems, in which graph models contain directed cycles. The strict requirement of the acyclicity of the directed graph representing the Bayesian network does not allow to efficiently solve most of the problems that contain directed cycles. The modern theory of Bayesian networks prohibits the use of directed cycles. The requirement of acyclicity of the graph can significantly simplify the general theory of Bayesian networks, significantly simplify the development of algorithms and their implementation in program code for calculations in Bayesian networks.
PubDate: 2021-04-30
Issue No: Vol. 67, No. 2 (2021)

• Design of wearable EEG device for seizures early detection

• Authors: Viktoriia Gaidar, Oleksandr Sudakov
Pages: 187 - 192
Abstract: This paper presents the design of a wearable electroencephalography device and signal processing algorithm for early detection and forecasting of the epileptiform activity. The availability of the examination of functional brain activity for a prolonged period, outside of the hospital facilities, can provide new advantages in early diagnosis and intervention systems. In this study, the low-cost five-channel device is presented. The system consists of two main parts: the data acquisition and transmission units and processing algorithms. In order to create the robust epileptiform pattern recognition approach the application of statistical sampling and signal processing techniques are performed. The discrete wavelet and Hilbert-Huang transforms with principal component analysis are used in order to extract and select a low-dimension feature vector.
PubDate: 2021-04-30
Issue No: Vol. 67, No. 2 (2021)

• Arithmetic using compression on elliptic curves in Huff's form and
its applications

• Authors: Robert Dryło, Tomasz Kijko, Michał Jakub Wroński
Pages: 193 - 200
Abstract: In this paper for elliptic curves provided by Huff's equation $H_{a,b}: ax(y^2-1) = by(x^2-1)$ and general Huff's equation $G_{\overline{a},\overline{b}}\ :\ {\overline{x}}(\overline{a}{\overline{y}}^2-1)={\overline{y}}(\overline{b}{\overline{x}}^2-1)$ and degree 2 compression function $f(x,y) = xy$ on these curves, herein we provide formulas for doubling and differential addition after compression, which for Huff's curves are as efficient as Montgomery's formulas for Montgomery's curves $By^2 = x^3 + Ax^2 + x$. For these curves we also provided point recovery formulas after compression, which for
a point $P$ on these curves allows to compute $[n]f(P)$ after compression using the Montgomery ladder algorithm, and then recover $[n]P$. Using formulas of Moody and Shumow for computing odd degree isogenies on general Huff's curves, we have also provide formulas for computing odd degree isogenies after compression for these curves.
Moreover, it is shown herein how to apply obtained formulas using compression to the ECM algorithm. In the appendix, we present examples of Huff's curves convenient for the isogeny-based cryptography, where compression can be used.
PubDate: 2021-04-30
Issue No: Vol. 67, No. 2 (2021)

• ID-based, proxy, threshold signature scheme

• Authors: Jacek Pomykała, Henryk Kułakowski, Piotr Krzysztof Sapiecha, Błażej Grela
Pages: 201 - 205
Abstract: We propose the proxy threshold signature scheme with the application of elegant construction of verifiable delegating key in the ID-based infrastructure, and also with the bilinear pairings. The protocol satisfies the classical security requirements used in the proxy delegation of signing rights. The description of the system architecture and the possible application of the protocol in edge computing designs is enclosed.
PubDate: 2021-04-30
Issue No: Vol. 67, No. 2 (2021)

• Cryptographically Strong Elliptic Curves of Prime Order

• Authors: Janusz Szmidt, Rafał Gliwa, Marcin Barański
Pages: 207 - 212
Abstract: The purpose of this paper is to generate cryptographically strong elliptic curves over prime fields Fp, where p is a Mersenne prime, one of the special primes or a random prime. We search for elliptic curves which orders are also prime numbers. The cryptographically strong elliptic curves are those for which the discrete logarithm problem is computationally hard. The required mathematical conditions are formulated in terms of parameters characterizing the elliptic curves.We present an algorithm to generate such curves. Examples of elliptic curves of prime order are generated with Magma.
PubDate: 2021-04-30
Issue No: Vol. 67, No. 2 (2021)

• Crisis remote education from the perspective of one-year experience of

• Authors: Milosz W Romaniuk, Joanna Teresa Łukasiewicz-Wieleba
Pages: 213 - 219
Abstract: The article presents the results of the questionnaire research carried out after the first and repeated after the second semester of crisis distance education, conducted at the Academy of Special Education. Academic lecturers participating in the study indicate a significant decrease in the level of commitment, activity, the regularity of work and the quality of performing tasks presented by students. Lecturers benefit from training and technical support organized by the university. They feel an acute inability to contact students personally, but appreciate the time savings and no need to travel to work. The respondents point to the problem of controlling student integrity during remote examinations. Growing experience in remote education results in higher IT competences and conviction to this type of teaching.
PubDate: 2021-04-30
Issue No: Vol. 67, No. 2 (2021)

• Crisis remote education from the perspective of one-year experience of
students

• Authors: Milosz W Romaniuk, Joanna Teresa Łukasiewicz-Wieleba
Pages: 221 - 227
Abstract: The article presents the results of the questionnaire research carried out after the first and repeated after the second semester of crisis remote education, conducted at The Maria Grzegorzewska University. Students participating in the study indicate a significant increase in their IT competences and the level of remote education. They declare a similar, high level of commitment and independence during classes. They indicate that commitment, activity, contact with the lecturers, regularity and quality of work, as well as the adequacy of the grades given are better during traditional education, although their timeliness is higher during distance education. The computer equipment of students and the way of accessing the Internet have not changed significantly. 20% of respondents admitted to using unauthorized assistance during exams. In the statements of students, on the one hand, there is a desire to return to social contacts and traditional classes, and on the other hand, a desire to maintain remote education, associated with the comfort of home-based learning and independence.
PubDate: 2021-04-30
Issue No: Vol. 67, No. 2 (2021)

• STRESS TESTING MQTT SERVER FOR PRIVATE IOT NETWORKS

Pages: 229 - 234
Abstract: The rapid development of the Internet of Things (IoT) and the wide area of application rise the IoT concept to be the future of the internet. Indeed, IoT environment has a special nature with a lot of constraints in term of resource consumption. Moreover, the data exchanged between things and the internet is big data. In order to achieve efficiency in IoT communication, many technologies and new protocols based on these technologies have been developed. This paper aims to study the performance of Message Queuing Telemetry Transport (MQTT) by implementing this protocol on test-bed network infrastructure and analyzing the performance properties such as delay jitter, packet loss and throughput for real time and non-real time scenarios. Finally, future research issues in MQTT protocol are suggested.
PubDate: 2021-04-30
Issue No: Vol. 67, No. 2 (2021)

• Modeling of the user’s identification security system of on the 2FA
base

• Authors: Waldemar Wójcik, Olga Ussatova, Saule Nyssanbayeva
Pages: 235 - 240
Abstract: The article describes methods of user identification using authentication based on the second factor. Known algorithms and protocols for two-factor authentication are considered. An algorithm is proposed using mobile devices as identifiers and generating a temporary password based on the hash function of encryption standards. For an automated control system, a two-factor authentication model and a sequential algorithm for generating a temporary password using functions have been developed. The implementation of the system is based on the Node.js software platform using the JavaScript programming language, as well as frameworks and connected system libraries. MongoDB, an open source database management system for information storage and processing was used.
PubDate: 2021-04-30
Issue No: Vol. 67, No. 2 (2021)

• Inertial sensors in the stabilization system of the balancing vehicle

• Authors: Stanisław Chudzik
Pages: 241 - 246
Abstract: The article presents the possibilities of using popular MEMS inertial sensors in the object tilt angle estimation system and in the system for stabilizing the vertical position of the balancing robot. Two research models were built to conduct the experiment. The models use microcontroller development board of the STM32F3 series with the Cortex-M4 core, equipped with a three-axis accelerometer, magnetometer and gyroscope. To determine the accuracy of the angle estimation, comparative tests with a pulse encoder were performed.
PubDate: 2021-04-30
Issue No: Vol. 67, No. 2 (2021)

• Basic Logic Gates in Two Dimensional Photonic Crystals for All Optical
Device Design

• Authors: Mahesh V Sonth, G. Srikanth, Pankaj Agrawal, B. Premalatha
Pages: 247 - 253
Abstract: The research carried out in the field of optics and photonics with an idea to design and develop the all optical logic devices in the fascinating material known as photonic crystals (PhCs). The structural investigation reveals that the two dimensional (2-D) PhCs is more suitable for fabrication of optoelectronic components. In this article we have designed basic logic gates in 2-D PhCs as they are the building blocks for the construction of optical devices and in these, refractive index is periodically modulated with the wavelength. The understanding of light behaviour in complex PhCs helps in creating photonic band gap (PBG) that can prevent light of certain wavelength propagating in crystal lattice structure. For the selected geometry structure, three PBG bands will exists out of which two of them are transverse electric (TE) and one is transverse magnetic (TM) mode. The PBG bands in the TE mode ranges from 0.31(a/λ) to 0.46(a/λ) , 0.61(a/λ) to 0.63(a/λ) and TM mode ranges from 0.86(a/λ) to 0.93(a/λ). The free space wavelength of 1550 nm is set for the finite difference time domain (FDTD) simulation of the structure. The response time and computational overhead required for the proposed OR gate is 0.128ps and 4.4MB is obtained. Also we calculated the extinction ratio for AND gate and NOT gate as 6.19 dB and 10.21 dB respectively.
PubDate: 2021-04-30
Issue No: Vol. 67, No. 2 (2021)

• Impact of Dimming LED Street Luminaires on Power Quality

• Authors: Tomasz Lerch, Michał Rad, Igor Wojnicki
Pages: 255 - 260
Abstract: More and more street lighting deployments use LED technology as a light source. Unfortunately, the new technology also brings some challenges with it that remain unnoticed until installed at scale. This article presents issues related to capacitive reactive power consumed by LED luminaires. The problem is even more profound if the luminaire is dimmed, because it consumes capacitive reactive power, which is very undesirable in the power system. Countermeasures in terms of reactive power compensation for a luminaire working with variable power and their effects are also presented. The article also contains the results of the harmonic analysis of the LED luminaires current for full power and dimmed operation.
PubDate: 2021-04-30
Issue No: Vol. 67, No. 2 (2021)

• Development of data-mining technique for seismic vulnerability assessment

• Authors: Waldemar Wójcik, Markhaba Karmenova, Saule Smailova, Aizhan Tlebaldinova, Alisher Belbeubaev
Pages: 261 - 266
Abstract: Assessment of seismic vulnerability of urban
infrastructure is an actual problem, since the damage caused by
earthquakes is quite significant. Despite the complexity of such
tasks, today’s machine learning methods allow the use of “fast”
methods for assessing seismic vulnerability. The article proposes
a methodology for assessing the characteristics of typical urban
objects that affect their seismic resistance; using classification and
clustering methods. For the analysis, we use kmeans and hkmeans
clustering methods, where the Euclidean distance is used as a
measure of proximity. The optimal number of clusters is
determined using the Elbow method. A decision-making model on
the seismic resistance of an urban object is presented, also the
most important variables that have the greatest impact on the
seismic resistance of an urban object are identified. The study
shows that the results of clustering coincide with expert estimates,
and the characteristic of typical urban objects can be determined
as a result of data modeling using clustering algorithms.
PubDate: 2021-04-30
Issue No: Vol. 67, No. 2 (2021)

• Optimal Ensemble Learning Based on Distinctive Feature Selection by
Univariate ANOVA-F Statistics for IDS

• Authors: Shaikh Shakeela, Nandigama Sai Shankar, P Mohan Reddy, T Kavya Tulasi, M Mahesh Sai
Pages: 267 - 275
Abstract: Cyber-attacks are increasing day by day. The generation of data by the population of the world is immensely escalated. The advancements in technology, are intern leading to more chances of vulnerabilities to individual’s personal data. Across the world it became a very big challenge to bring down the threats to data security. These threats are not only targeting the user data and also destroying the whole network infrastructure in the local or global level, the attacks could be hardware or software. Central objective of this paper is to design an intrusion detection system using ensemble learning specifically Decision Trees with distinctive feature selection univariate ANOVA-F test. Decision Trees has been the most popular among ensemble learning methods and it also outperforms among the other classification algorithm in various aspects. With the essence of different feature selection techniques, the performance found to be increased more, and the detection outcome will be less prone to false classification. Analysis of Variance (ANOVA) with F-statistics computations could be a reasonable criterion to choose distinctives features in the given network traffic data. The mentioned technique is applied and tested on NSL KDD network dataset. Various performance measures like accuracy, precision, F-score and Cross Validation curve have drawn to justify the ability of the method.
PubDate: 2021-04-30
Issue No: Vol. 67, No. 2 (2021)

• A Comparison of Proximity Sensors for a Bicycle-to-Car Distance
Rangefinder

• Authors: Bartłomiej Michał Zieliński
Pages: 277 - 282
Abstract: In the article, three types of proximity sensors that might be used in bicycle rangefinder to measure the distance between the bicycle and an overtaking car are compared. The influence of various factors on the accuracy of the distance measurements obtained using ultrasonic, infrared and laser sensors is tested, among others, light conditions, car surface type and colour, rain, pollination and vibrations.
PubDate: 2021-04-30
Issue No: Vol. 67, No. 2 (2021)

• Corona discharge based meters for manufacturing of conducting microwires

• Authors: Aliya Sovetzhanovna Tergeussizova, Shabden Abuovich Bakhtaev, Waldemar Wójcik, Maxat Orunbekov, Gulzada Dauletbekovna Mussapirova, Aynur Zhumakhanovna Toigozhinova
Pages: 283 - 288
Abstract: Różnorodność kształtów elektrod i ich rozmieszczenie względem siebie, a także możliwość wyładowania koronowych w otaczającym powietrzu, stworzyły przesłanki do szeregu nowych metod i przetworników wyładowań koronowych do pomiaru parametrów mikroprzewodów i liniowych. wymiary różnych obiektów. Zasadniczo nowa metoda kontroli bezkontaktowego badania na podstawie wartości prądu wyładowania koronowego od drutu ulotowego umieszczonego wewnątrz komory wyładowczej. Ten artykuł zawiera przegląd tej metody.
PubDate: 2021-04-30
Issue No: Vol. 67, No. 2 (2021)

• An Enhanced IEEE1588 Clock Synchronization for Link Delays Based on a
System-on-Chip Platform

• Authors: Xiaohan Wei, Xingzhong Xiong, Zhongqiang Luo, Jianwu Wang, Kaixing Cheng
Pages: 289 - 294
Abstract: The clock synchronization is considered as a key technology in the time-sensitive networking (TSN) of 5G fronthaul. This paper proposes a clock synchronization enhancement method to optimize the link delays, in order to improve synchronization accuracy. First, all the synchronization dates are filtered twice to get the good calculation results in the processor, and then FPGA adjust the timer on the slave side to complete clock synchronization. This method is implemented by Xilinx Zynq UltraScale+ MPSoC (multiprocessor system-on-chip), using FPGA+ARM software and hardware co-design platform. The master and slave output Pulse Per-Second (PPS) signals. The synchronization accuracy was evaluated by measuring the time offset between PPS signals. Contraposing the TSN, this paper compares the performance of the proposed scheme with some previous methods to show the efficacy of the proposed work. The results show that the slave clock of proposed method is synchronized with the master clock, leading to better robustness and significant improvement in accuracy, with time offset within the range of 40 nanoseconds. This method can be applied to the time synchronization of the 5G open fronthaul network and meets some special service needs in 5G communication.
PubDate: 2021-04-30
Issue No: Vol. 67, No. 2 (2021)

• An overview of the methods of synthesis, realization and implementation of
orthogonal 3-D rotation filters and possibilities of further research and
development

• Authors: Paweł Poczekajło
Pages: 295 - 300
Abstract: In the paper, an overview of the methods and algorithms of synthesis, realization and implementation used by the author to obtain orthogonal 3-D filters with a structure made of Givens rotations has been presented. The main advantage of orthogonal filters, which may have a lower sensitivity to quantization of the coefficients, was indicated. The author proposed a number of possible changes and modifications of individual stages, which may result in obtaining filters with even better parameters. The work will be the basis for the direction of further research.
PubDate: 2021-04-30
Issue No: Vol. 67, No. 2 (2021)

• Centralized Spectrum Sharing and Coordination Between Terrestrial and
Aerial Base Stations of 3GPP-Based 5G Networks

• Authors: Kamil Bechta
Pages: 301 - 308
Abstract: The objective of this paper is to estimate performance of a new approach for spectrum sharing and coordination between terrestrial base stations (BS) and On-board radio access nodes (UxNB) carried by Unmanned Aerial Vehicles (UAV). This approach employs an artificial intelligence (AI) based algorithm implemented in centralized controller. According to the assessment based on the latest specifications of 3rd Generation Partnership Project (3GPP) the newly defined Unmanned Aerial System Traffic Management (UTM) is feasible to implement and utilize an algorithm for dynamic and efficient distribution of available radio resources between all radio nodes involved in process of optimization. An example of proprietary algorithm has been described, which is based on the principles of Kohonen neural networks. The algorithm has been used in simulation scenario to illustrate the performance of novel approach of centralized radio channels allocation between terrestrial BSs and UxNBs deployed in 3GPP-defined rural macro (RMa) environment. Simulation results indicate that at least 85% of simulated downlink (DL) transmissions are gaining additional channel bandwidth if presented algorithm is used for spectrum distribution between terrestrial BSs and UxNBs instead of baseline soft frequency re-use (SFR) approach.
PubDate: 2021-04-30
Issue No: Vol. 67, No. 2 (2021)

• Optimized Inter Prediction for H.264 Video codec

• Authors: T. Bernatin, G. Sundari, A. Sahaya Anselin Nisha, M.S. Godwin Premi
Pages: 309 - 314
Abstract: Transmisja wideo w wysokiej jakości jest jeden z głównych współczesnej komunikacji. Zmieniające się możliwości dostosowania się do oferowanych rozwiązań przez standardy kodeków. H.264 wymagania dotyczące kompresji wideo. W tej pracy poszukito próbę optymalizacji wzajemnego proponowania wraz z ulepszeniem prognozy wewnętrznej, aby zapewnić dostępność danych portyfikacyjnych, a tym samym poszerzoną szerokość pasma standardowego, co jest poprawne w aplikacji w aplikacji. W intrapredykcji, wygoda 9 trybów z blokami luminancji 4 * 4 wybierany jest tylko tryb predykcji DC, opłata licencyjna złożoność kodowania w kierunku optymalnego wykorzystania logiki w celu obsługi typowej płytki FPGA do implementacji sprzętowej. Najbardziej najbardziej zaawansowany,Przewidywaniesystemowe jest przeprowadzane z zastosowaniem efektywnie bloków M9K z odpowiednią synchronizacją taktowania w celu opóźnienia operacji kodowania. Układ eksperymentalny składający się z dwóch płytek Altera DE2-115 połączonych kablem Ethernet zademonstrował transmisję wideo. Te analityczne etapy predykcji intra i predykcji pośredniej spowodowały poprawę poprawy kompresji wideo przy dobrej jakości subiektywnej i zwiększonej kompresji wideo.
PubDate: 2021-04-30
Issue No: Vol. 67, No. 2 (2021)

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