bluuebunny/crossref_metadata_2025 huggingface dataset:
Lembaga Adat 19 Segalo Batin: Penyelesaian Konflik Pembagian Harta Warisan di Dusun Baru Kecamatan Tabir
Authors: Ridwan Ridwan , Delima Sukma , Chairiyah Sri Zul , Mahmud Amer
Published: January 2023

Penelitian ini bertujuan untuk peran Lembaga Adat 19 Segalo Batin dalam penyelesaian konflik pembagian harta warisan menurut perspektif adat Rantau Panjang Kecamatan Tabir Kabupaten Merangin dan mengetahui kendala Lembaga Adat 19 Segalo Batin dalam penyelesaian konflik pembagian harta warisan menurut perspektif adat Rantau Panjang Kecamatan Tabir Kabupaten Merangin. Metode yang digunakan dalam penelitian ini penelitian ini adalah metode penelitian kualitatif yang bersifat dengan studi deskriptif. Metode yang digunakan dalam penelitian ini penelitian ini adalah metode penelitian kualitatif yang bersifat dengan studi deskriptif. Teknik pemilihan informan yang digunakan oleh peneliti dalam penelitian ini adalah dengan menggunakan metode purposive sampling (teknik penentuan sampel dengan pertimbangan tertentu). Hasil penelitian menunjukan bahwa peran Lembaga Adat 19 Segalo Batin dalam penyelesaian konflik pembagian harta warisan menurut perspektif adat Rantau Panjang Kecamatan Tabir Kabupaten Merangin diantaranya dengan menjaga sistem kewarisan menurut adat rantau panjang dan dengan melakukan pengawasan pelaksanaan pembagian harta warisan. Kendala Lembaga Adat 19 Segalo Batin dalam penyelesaian konflik pembagian harta warisan menurut perspektif adat Rantau Panjang Kecamatan Tabir Kabupaten Merangin diantaranya adalah banyaknya masyarakat yang melakukan pembagian Warisan secara kekeluargaan dan ada juga yang melakukan pembagian Warisan secara Islami.
Pengaruh Kualitas Pelayanan, Harga Dan Kepercayaan Terhadap Loyalitas Pelanggan Melalui Kepuasan Pelanggan
Authors: Aprileny Imelda , Rochim Afzalur , Emarawati Jayanti Apri
Published: January 2023

This study aims to determine how much influence service quality, price and trust have on customer loyalty through customer satisfaction at Al Azhar 4 Islamic High School students.This study uses an associative research strategy which is measured by using the path analysis method with SPSS 22.00. The population of this study were students of SMA Islam Al Azhar 4 Kemang Pratama, Bekasi, with a total of 100 respondents. The data used in this study are primary data. Data collection techniques used two methods, namely library research and field studies by distributing questionnaires. The research results prove that 1). Service quality has a direct effect on customer satisfaction. 2). Price has no direct effect on customer satisfaction. 3). Trust has no direct effect on customer satisfaction. 4). Service quality has a direct effect on customer loyalty. 5). Prices have a direct effect on customer loyalty. 6). Trust has a direct effect on customer loyalty. 7). Customer satisfaction has no direct effect on customer loyalty. 8). The indirect effect of service quality on customer loyalty through customer satisfaction is not significant. 9). The indirect effect of price on customer loyalty through customer satisfaction is not significant. 10). The indirect effect of trust on customer loyalty through customer satisfaction is not significant.
Pengaruh Persepsi Kepercayaan, Persepsi Risiko, dan Persepsi Kemudahan Penggunaan terhadap Niat Pembelian secara Online pada Konsumen di Kota Bengkulu
Authors: Nursea Dian , Islamuddin Islamuddin
Published: January 2023

The purpose of this study was to determine the effect of perceived trust, perceived risk, and perceived ease of use on online purchase intentions on consumers in Bengkulu City. This research was conducted on consumers in Bengkulu City. The population of this research is consumers in Bengkulu City, while the sample of this research is Bengkulu City community totaling 170 people. Data collection techniques using observation, interviews, questionnaires. Data Analysis Techniques using Descriptive Analysis, Inferential Analysis It can be concluded that all variables Perception of Trust, Perception of Risk, and Perception of Ease of Use partially or simultaneously affect the Online Purchase Intention of Consumers in Bengkulu City.
Dampak Rasio Kesehatan Bank pada Kinerja Keuangan Bank Umum Syariah
Authors: Rusmini Cicih , Mubarokah Isro’iyatul
Published: January 2023

This study aims to examine whether there is an impact between bank health ratios and financial performance. In determining the sample using the Purposive Sampling Method so as to obtain 6 samples. Research data obtained from the annual reports of each bank. The technique used in this research is multiple linear regression analysis. The results of the research by t test, financial performance is not influenced by the Capital Adequacy Ratio (CAR), but is influenced by Non Performing Financing (NPF), Financing to Deposit Ratio (FDR), and Operating Costs and Operating Income (BOPO). The results of the study using the f test, the bank's health ratio affects the financial performance of Islamic commercial banks.
Pengaruh Harga, Kualitas Pelayanan dan Fasilitas terhadap Kepuasan Pelanggan
Authors: Suhardi Yusuf , Zulkarnaini Zulkarnaini , Burda Agustian , Darmawan Arya , Klarisah Adila Nur
Published: January 2023

Penelitian ini bertujuan untuk mengetahui pengaruh harga, kualitas pelayanan dan fasilitas terhadap kepuasan pelanggan di sekolah olah raga Binasehat di Bekasi. Penelitian ini menggunakan metode asosiatif dengan pendekatan kuantitatif. Dalam penelitian ini terdapat 3 variabel bebas yaitu: Harga (X1), Kualitas Pelayanan (X2), Fasilitas (X3) dan terdapat 1 variabel terikat yaitu Kepuasan Pelanggan (Y). Jumlah sampel yang diteliti dalam penelitian ini sebanyak 105 responden dan seluruh variabel diukur menggunakan skala Likert.  Teknik pengumpulan data menggunakan kuisioner yang telah di uji validitas dan reliabilitasnya. Analisis yang digunakan adalah Uji t dan koefisien determinasi menggunakan program SPSS versi 26. Hasil penelitian menunjukkan bahwa variabel harga berpengaruh terhadap Kepuasan Pelanggan, variabel Kualitas Pelayanan berpengaruh terhadap Kepuasan Pelanggan dan variabel Fasilitas berpengaruh terhadap Kepuasan Pelanggan. Kontribusi pengaruh harga terhadap kepuasan pelanggan yaitu sebesar 28,4%, pengaruh kualitas pelayanan terhadap kepuasan pelanggan sebesar 48,6% dan kontribusi pengaruh fasilitas terhadap kepuasan pelanggan sebesar 65,2%.
Carcinoma de tireoide associado à metástase pulmonar e efusão pleural em um gato: relato de caso
Authors: Lizardo Denis Henrique da Silva , Coelho Débora de Maio
Published: January 2023

O presente trabalho relata um caso de carcinoma de tireoide em um felino doméstico, SRD de 10 anos de idade, fêmea, em que foram realizados exames laboratoriais e de imagem no laboratório veterinário Delort em Jundiaí (SP). A paciente apresentava apenas perda de peso e aumento de volume em região cervical ventral no início do quadro. Durante os exames de ultrassom abdominal e radiografia torácica observou-se presença de efusão pleural e opacificação pulmonar por padrão miliar, o que sugeria um quadro metastático. Após os achados o paciente foi encaminhado para o oncologista, além de ser realizada a colheita de material para exame citológico, onde foi confirmado o diagnóstico de carcinoma.
PENGARUH KUALITAS PELAYANAN, FASILITAS DAN HARGA TERHADAP KEPUASAN KONSUMEN HOMESTAY PONDOK MERAPI SELO
Authors: Izzati Latifah , Rahayu Listyowati Puji , Lisdiana Nuning
Published: January 2023

This study aims to determine whether the quality of service, facilities and prices affect the satisfaction of homestay Pondok Merapi Selo customers. The population in this study were consumers who stayed at homestays in Pondok Merapi. Data collection technique through the distribution of questionnaires with a sample of 100 respondents. The research method is a quantitative method. Testing of data instruments is carried out with validity and reliability tests, for data analysis, normality tests, multicholinearity tests, heteroskedasticity tests, autocorrelation tests, and hypothesis tests are used to find out whether between variables have a significant relationship . The results showed that the service quality variable of calculated t value of 0.681 < t of table 1.984 and the sig value of 0.498 > of sig of 0.05 which means insignificant. While the facility variable partially t counts 2.879 > t table 1.984 and the sig value is 0.005 > 0.05 which means significant. And the price variable is partially calculated t value 2.879 > t table 1.984 and sig value 0.005 > sig 0.05 which means significant . The result of the F test calculated 36.634 > the value of the table F using the α ( alpha ) 0.05 or 5 % then Ho was successfully rejected and Ha was accepted. Ho's refusal is evidenced by the calculation results that the value of Sig ( 0.000 ) < of a ( alpha ) 0.05 so that it can be concluded that all independent variables simultaneously affect the independent variable, namely consumer satisfaction.
KINERJA PEGAWAI DITINJAU DARI PENGETAHUAN, PELATIHAN, KOMPETENSI DAN MOTIVASI PADA PETUGAS PEMADAM KEBAKARAN DI KABUPATEN KLATEN
Authors: Sumino Sumino , Sarsono Sarsono , Wulan Ida Aryati Diyah Purnomo
Published: January 2023

The purpose of this study or research is to prove and analyze how far the influence between variables, both simultaneously and partially, is on four variables, namely knowledge, training, competence and motivation for Firefighters in Klaten Regency, Central Java.
The design of this research or research uses descriptive quantitative research methods. The research population or research is all employees who are on duty or at the Klaten Regency Fire Department, Central Java, with a total of 35 (thirty five) people. The sample used in this study was the entire population in the Fire Department in Klaten Regency, Central Java. This data collection uses data in the form of questionnaires which are distributed to all respondents in the Fire Department in Klaten Regency, Central Java. The data analysis technique used was statistical analysis, namely multiple linear regression, F test, t test, and the coefficient of determination.
The results of this study indicate that the variables of knowledge, training, competence and motivation partially and significantly have a very significant effect on the performance of Firefighters in Klaten Regency, Central Java. Suggestions from this study, Firefighters in Klaten Regency are asked and expected to continue to improve the existing knowledge, training, competence and motivation so far, so that it is hoped that the performance of the employees will increase and be better than the previous office's vision and mission. Fire in Klaten Regency will be achieved. Thus, this research is expected to bring good changes in the Fire Department in Klaten Regency, Central Java for the better.
Efektivitas Penerapan Model Pembelajaran M-APOS dan Model Pembelajaran Langsung untuk Meningkatkan Kemampuan Pemecahan Masalah Matematis Pokok Bahasan Bentuk Pangkat, Akar, dan Logaritma pada Siswa Kelas X SMA Negeri 8 Sinjai
Authors: Syam Akbar
Published: January 2023

Tujuan dari penelitian ini adalah untuk mengetahui (1) Bagaimana kemampuan pemecahan masalah matematis siswa yang diajar dengan menggunakan model pembelajaran M-APOS (2) Bagaimana kemampuan pemecahan masalah matematis siswa yang diajar dengan menggunakan model pembelajaran Langsung (3) Apakah terdapat perbedaan yang signifikan tingkat kemampuan pemecahan masalah matematis siswa yang diajar dengan menggunakan model pembelajaran M-APOS dan model pembelajaran Langsung pada pokok bahasan bentuk pangkat, akar, dan logaritma siswa kelas X SMA Negeri 8 Sinjai. Penelitian ini merupakan penelitian eksperimen dengan jenis penelitian quasi experiment. Populasi penelitian adalah seluruh siswa kelas X SMA Negeri 8 Sinjai yang terbagi atas 5 kelas. Sampel diambil dengan metode Simple Random Sampling, yang terpilih menjadi kelas eksperimen adalah kelas X Mia 1 sebanyak 32 siswa dan kelas kontrol adalah kelas X Mia 2 sebanyak 33 siswa. Desain penelitian yang digunakan adalah pretest-posttest control group design. Teknik pengumpulan data dilakukan dengan menggunakan instrumen tes pemecahan masalah matematis berbentuk uraian sejumlah 5 nomor pretest dan 5 nomor untuk posttest. Soal uraian ini, sebelumnya telah diuji validitasnya dengan Content Validity serta lembar observasi yang digunakan untuk mengamati aktivitas siswa selama proses kegiatan penelitian berlangsung. Teknik analisis data dilakukan dengan analisis deskriptif dan analisis infrensial. Sedangkan pengolahan data menggunakan perangkat lunak Statistical Package for Social Sciences (SPSS) for Windows. Taraf signifikansi yang ditetapkan sebelumnya adalah 0,05. Sebelum perlakuan diperoleh hasil analisis statistik deskriptif rata-rata kemampuan pemecahan masalah matematis pada kelas eksperimen= 77.03 dan kelas kontrol = 75.44, setelah perlakuan diperoleh hasil analisis statistik deskriptif rata-rata kemampuan pemecahan masalah matematis kelas eksperimen = 88.56 dan kelas kontrol = 79.84. Hasil analisis inferensial data dengan menggunakan uji U-Mann Whiteney menunjukkan bahwa nilai sign yang diperoleh = 0,000 dalam artian bahwa sign = 0,000 < 0,05, hal ini menunjukkan bahwa terdapat perbedaan yang signifikan tingkat kemampuan pemecahan masalah siswa yang diajar dengan menggunakan model pembelajaran M-APOS dan yang tidak pada pokok bahasan bentuk pangkat, akar, dan logaritma siswa kelas X SMA Negeri 8 Sinjai.
ASSESSING EFFECT OF COMMUNITY PROBLEM SOLVING ON EVALUATION OF COMMUNITY SAFETY IN LAMU WEST SUB-COUNTY, KENYA
Authors: Madoya Micah  , Dr. George Wagah  , Dr. Isabella Asamba
Published: January 2023

Even though community policing elements such as community problem solving have been mentioned as a possible factor influencing monitoring and evaluation of community safety, there is limited research to ascertain this in Lamu West Sub County. The purpose of this study was to establish the effect of community problem solving on evaluation of community safety in Lamu West Sub-County. The study adopted quantitative design where data was collected from a sample of 405 respondents drawn from 32,873 of Lamu West Sub-County residents with the aid of a questionnaire. Correlation and regression analyses were adopted in data analysis to help in establishing the relationship between the dependent and independent variables. The findings of this study demonstrated that there was statistically significant positive relationship between community problem solving and monitoring and evaluating community safety (β=0.634; p<0.05). The study found that aspects such as consultation, participation, engagement, professionalism, problem identification, proactive problem solving and mediation improves community safety. It is recommended that community problem solving should be strengthened because it builds trust, enhances information flow, and leads to the discovery of new areas where the police and the community may work together. Finally, community leadership should be people centered in order to enhance accountability that seeks to promote community safety. The study concluded that community problem solving significantly influence monitoring and evaluating community safety The study recommends that effective collaborations between law enforcement and community stakeholders are critical to public safety, and its critical that government agencies, community organizations, nonprofits, companies, and private citizens all see public safety as a shared duty. Community leadership should be people centered in order to enhance accountability that seeks to promote community safety.
KEY WORDS: Community Problem Solving, Evaluation of Community Safety, Lamu West Sub-County
FEATURES OF NEUROLOGICAL DISORDERS IN CHILDREN WITH CONGENITAL AND ACQUIRED SENSORINEURAL HEARING LOSS
Authors: Sh. Sh. Shamansurov  , D.K. Makhkamova  , I. K. Abdukadirova
Published: January 2023

Sensorineural hearing loss is currently the most important medical and social problem and is an urgent problem of neurology. According to various researchers, from 6% to 36% of the worlds population suffers from ear pathology, of which 60-80% have sensorineural hearing impairment (damage to the cochleo-vestibular nerve receptor - the cochlea of the inner ear).Deafness is the most common defect in sensory systems in children and occurs in 1: 750 cases, and in adults 4-36% depending on age, which reflects the interaction of environmental factors and individual genetic predisposition (Tranebjaerg L., 2000).About 400 genetic syndromes that include hearing impairment have been described (Friedman T.V., Griffith A J., 2003).
KEY WORDS: sensorineural hearing loss, neurological disorders.
Purpose: to study clinical and neurological features in patients with sensorineural hearing loss.
EFFECTS OF INTERMITTENT FASTING IN BODY COMPOSITION ON OBESE PEOPLE: A SYSTEMATIC REVIEW
Authors: Rahul Dev Choudhury  , Dr. Neelam Sharma  , Sukanta Ch. Nath
Published: January 2023

This article has been developed to address the impact of intermittent fasting on the body composition of obese individuals. Presently there are about 650 million obesity-affected individuals worldwide. Intermittent fasting is primarily implemented and practised to contribute to better health conditions and weight loss. The prevalence is measured by a BMI above 25, identified as overweight and BMI above 30, identified as obese. This paper has a systematic literature review of relevant studies to develop understanding and idea development. Data extraction for this article has followed the PRISMA model extracting 25 relevant journals from 55 initial considerations. The findings have been represented following a thematic approach addressing the effects, strategies and challenges of intermittent fasting. The Twice-a-week Method, Alternate Day Fasting, Time Restricted Eating and the 24 Hour Fast respective intermittent fasting techniques have been evaluated. Calorie intake restrictions and fasting are fundamental contributing factors to developing hypoglycemia or “type 2 diabetes”, which is identified as an impact of intermittent fasting. Recommendations have been farmed addressing better practice and inclusion of intermittent fasting by Controlled Practice of Intermittent Fasting and Compliance with Medical Conditions.
KEYWORDS: Intermittent Fasting, Underwater Weighing, obesity, overweight, weight loss, body, composition
THE DEVELOPING OF CHATBOT FOR UNIVERCITY AND COOLEGE ADMISSION
Authors:   Moscow Technical University of Communication and Informatics, Stepanov M.S. , Popov V.G. ,   Moscow Technical University of Communication and Informatics, Fedorova N.K. ,   Moscow Technical University of Communication and Informatics
Published: January 2023

Today, customer service automation is one of the main business trends. The use of chatbots and other artificial intelligence tools replaces classic IVR (Interactive Voice Response) systems. Chatbot is a program that automatically answers customer requests by text or voice and, if necessary, routes it to an agent. Such solutions are actively used in contact centers of large companies (state institutions, banks, airlines, etc.). However, customers are not always satisfied with the service they receive. This can happen for various reasons, such as a limited number of communication scenarios, problems with recognizing customer questions, etc. In this article the development of a chatbot for university admission is considered. The goal is to improve customer experience and to increase the number of potential applicants through the use of modern customer service tools. The current state of affairs in the field of information support for applicants is analyzed. The main platforms of chatbots used in universities are considered, a comparison of their basic functions is given. The results of a sociological study to determine the questions most frequently asked by applicants are presented. Based on the collected data, the requirements for the functionality of the chatbot planned for development were determined. Plans for future work are given.
THE SYNTHESIS OF EXPLICIT ANALYTICAL FORMULAE FOR THE PROBABILISTIC MODELS OF SIGNALS USING FRACTION-OF-TIME APPROACH
Authors:   Moscow Aviation Institute (National Research University), Shevgunov T.Ya.
Published: January 2023

The paper presents the development of the theoretical foundations of the fraction-of-time approach which allows one to carry out constructing the probabilistic model of a random process based on its singular realization where a priori information of its ergodic property is absent. The synthesis of the analytical expression for time-varying FOT density was conducted in the form of an explicit function depending on two variables, which was based on the detailed analysis of its implicit initial expression. The resultant form was shown to be the sum consisting of no more than countable number of summands containing one-dimensional Dirac delta functions. The explicit analytical representation led to a significant simplification of the subsequent integration in time, which was conducted for the evaluation of the stationary component of FOT describing the statistical property of the signal being analyzed. In addition, it is shown in the paper that the intermediate result of the conducted derivation, namely, the time-value distribution, plays an important role in constructing nonlinear probabilistic models of signals within the framework of the FOT approach. The Fourier series representation of the time-value distribution was obtained by the example of a monoharmonic signal, where the Fourier series coefficients are derived in the form of explicit functions of the threshold variable. The Fourier series representation with explicit Fourier coefficients was also obtained for the time-varying indicator function. The properties of the stationary components, which are related to zero cyclic frequency, of the time-value distribution and time varying indicator function were shown to be resembling the properties of probability density and cumulative distribution function describing one-dimensional random variable, while the components related to non-zero cyclic frequencies exhibit different properties. The models developed in the current research are aimed at developing new methods of estimating probabilistic characteristics of analyzed signals which in turn leads to the synthesis of new digital signal processing algorithms.
3D MODELING IN THE ANSYS WORKBENCH SOFTWARE COMPLEX ON THE EXAMPLE OF AERODROME EQUIPMENT STRUCTURES CALCULATION
Authors:   Spetsagregat Plant LLC, Subachev E.V. , Nikitin D.A. ,   Moscow Automobile and Road Construction State Technical University, Ershov V.S. ,   Moscow Automobile and Road Construction State Technical University, Akulov A.A. ,   Moscow Automobile and Road Construction State Technical University, Taldykin D.S. ,   Moscow Automobile and Road Construction State Technical University
Published: January 2023

The use of modern computer technologies makes it possible to achieve high practical and economic results in various fields of industry. Information technologies used in design are also actively developing. There is an increasing number of various computer simulation programs. The article proposes a 3D model of the structure of a metal subframe with subsequent calculation of the loads acting on it in the ANSYS Workbench 16.2 software package using the Static Structural module. Loading diagrams are given and graphs of the movement of the structural unit under study are formed for four cases of movement of airfield special equipment. An analysis was made of the dynamic characteristics of the movement of the car and the coefficients of adhesion to the road, during which the numerical values suitable for the developed system were determined in order to calculate the contact and non-contact forces. In the course of research, for each type of movement, the numerical values of the loads along the three main axes were identified. Dangerous areas are indicated where cases of violation of the integrity of the structure are possible. On the basis of the data obtained, a conclusion was formed that allows developing the design of an airfield watering machine, while eliminating shortcomings and errors in the design of power units of equipment.
RESEARCH OF RISK MANAGEMENT METHODS IN THE INFOCOMMUNICATION SYSTEM OF THE ENERGY PRODUCING COMPANY OF THE ISLAMIC REPUBLIC OF IRAN
Authors:   Moscow Technical University of Communications and Informatics (MTUCI), Jahed Rahmani
Published: January 2023

Industry 4.0 is transforming the economy with new technologies and risks, which requires dealing with uncertainty. The purpose of this work is to summarize the main risk management standards used, analyze the general aspects of the evolution of risk management, enterprise risk management, integrated enterprise risk management, and propose a concept for an energy producing company in Iran, Noursun Energy Group. The proposed concept considers the organizational and hierarchical structure of an enterprise as complex, the risk management policy as a global one, the relevant directions as permanent, and the risk orientation as an adaptive one. The novelty of the study lies in the fact that within the framework of the study, based on statistical analysis, it is determined that information technologies have a significant impact on the efficiency of procurement of public corporations in the energy sector of Iran. The survey focused on public corporations in the energy sector. The sample of this survey was representative as the respondents were from large organizations in the energy sector.
PHYSICAL PROCESSES IN THE ATMOSPHERE IONIZED BY LASER RADIATION DURING THE CREATION OF A RADIO COMMUNICATION LINE
Authors:   Siberian state University of telecommunications and Informatics, Abramova E.S. , Balandin S.F. ,   Laboratory of Optical Location V.E. Zuev Institute of Atmospheric Optics SB RAS, Donchenko V.A. ,   National Research Tomsk State University, V. D. Kuznetsov Siberian Physical-Technical Institute at Tomsk State University, Myshkin V.F. ,   Tomsk Polytechnic University, Khan V.A. ,   Laboratory of Optical Location V.E. Zuev Institute of Atmospheric Optics SB RAS,   Division for Nuclear-Fuel Cycle Tomsk Polytechnic University, Pavlova M.S. ,   Siberian state University of telecommunications and Informatics
Published: January 2023

The results of studies of ionization processes in the atmosphere that occur under the action of laser radiation make it possible to consider the possibility of using directed laser beams for location or formation of a communication channel. To do this, with the help of laser radiation in the atmosphere, a channel with a weakly ionized wall is formed, into which radio emission is introduced. The mini mum electron concentration Ne in the ionized channel, which ensures the reflection of the transmitted electromagnetic wave, depends on its frequency. If the frequency of electromagnetic radiation propagating in the channel is less than the frequency of plasma oscillations in the medium, then the waves are completely reflected from the ionized layer. In the range of long waves (1000-3000 m), the effect of self-radiation of plasma centers can be used to transmit information. By changing the dimensions of the plasma source in space, by modulating the laser radiation, it is possible to vary the frequency and amplitude of the emitted electromagnetic waves in a given range. The main mechanisms of creation of weak ionization channels in the atmosphere by laser radiation are considered. A scheme for the transmission of electromagnetic energy is proposed and its parameters are calculated. A variant of electromagnetic energy transfer by creating a plasma mirror in the atmosphere is considered. The frequency, duration, and energy of laser pulses necessary to create weak ionization channels in the atmosphere and ionosphere are estimated. The calculations and experiments carried out showed that an IR laser sub nanosecond radiation source with a pulse repetition rate of 108 Hz and providing a breakdown or pre-breakdown ionization mode can be used to transfer electromagnetic microwave energy in the atmosphere. It has been established that in the atmosphere it is possible to use both the breakdown mode and the pre-breakdown mode for generating and transmitting long-wave and microwave electromagnetic radiation. It is shown that in the pre-breakdown mode of aerosol ionization, anomalous scattering on plasma particle halos may occur due to the formation of plasmons, which increase the scattering intensity by 2-3 orders of magnitude.
THE QUALITY OF ESTIMATION OF PARAMETERS OF A BROADBAND SIGNAL WITH NON-OPTIMAL RECEPTION UNDER CONDITIONS OF DISPERSION DISTORTIONS IN THE EARTH'S IONOSPHERE
Authors:   Moscow Technical University of Communications and Informatics, Lipatkin V.I. , Lobov E.M. ,   Moscow Technical University of Communications and Informatics, Lobova E.O. ,   Moscow Technical University of Communications and Informatics
Published: January 2023

In the article, analytical expressions are obtained that make it possible to calculate the variance of the estimates of the initial phase, frequency and delay of the signal, as well as the covariance functions of pairs of estimates under the conditions of dispersion distortions. At the same time, the evaluating device does not know exactly or does not know the level of dispersion distortions at all and does not try to evaluate them. Therefore, the estimation of the parameters is carried out by a non-optimal algorithm. The described conditions arise in practice, for example, when trying to estimate the above parameters of a broadband signal by a classical estimator that does not take into account dispersion distortions. The described conditions also occur when the true value of the slope of the dispersion characteristic of the channel deviates from the previously measured value over time or due to the use of inaccurate measurement results or an inaccurate prediction of the value of the slope of the dispersion characteristic of the channel. The article presents analytically obtained graphs for the root-mean-square deviations of the obtained phase, delay and frequency estimates for the case of complete absence of dispersion distortion compensation and the case of incomplete dispersion distortion compensation. In particular, it is shown that the degradation of the quality of delay estimation is due to two factors: a value decrease and an expansion of the correlation peak. In terms of energy, this degradation exceeds the acquisition or demodulation loss. The results of the obtained calculations are confirmed by simulation modeling.
OBSERVATION SYSTEM RESOURCE PLANNING IN PRESENCE OF ACCESS CONTROL BASED ON VOLUME OF RESOURCE OCCUPIED BY TRAFFIC FLOWS
Authors:   Moscow Institute of Physics and Technology (State University), Andrabi Umer Mukhtar , Kanishcheva M.G. ,   Moscow Technical University of Communication and Informatics, Stepanov S.N. ,   Moscow Technical University of Communication and Informatics
Published: January 2023

Due to various recent improvements in cellular technology, communication networks now offer information flows with a wide range of transmission speed and service quality characteristics. These characteristics are more highly noticeable in intelligent networks, particularly when IoT technology is used. Regulation and high-quality transmission of such massive volumes of data present severe issues among virtual operators engaged in the communications sector and utilizing cellular network infrastructure to provide video surveillance services for its consumers. Unfortunately, no single approach exists that enables the execution of high-quality incoming traffic flow maintenance and the allocation of information transmission resources in diverse networks. One of the methods to address these issues is mathematical modelling, which takes into consideration the unique characteristics of traffic flows that emerge and are approved for servicing. Our work addresses this problem by designing a resource allocation strategy for an isolated LTE network cell with heterogeneous traffic flows while sharing its radio resources. Traffic sources considered are operator surveillance system's video cameras that use cellular network infrastructure to deliver data to analytical centers. A mathematical model is used to study the process of sharing a resource, which takes into consideration the priority of real-time traffic, the elasticity property during file transfer, and the access restriction for all threads, based on the quantity of resource held by each thread. When sharing the resources of an isolated LTE network cell with heterogeneous traffic flows. Traffic sources are surveillance system operators' video cameras that use cellular network infrastructure to deliver data to analysis centers. Algorithms for evaluating the characteristics of the service of applications are constructed and the dependence of the characteristics on the restriction of access is investigated. Using the developed model, a scenario of dynamic distribution of the access node resource between incoming sessions has been developed, which allows creating conditions for differentiated servicing of heterogeneous traffic flows based on access restrictions and resource loading by each of the considered flows.
EVALUATION OF THE STEALTH OF OFDM-SIGNALS BASED ON BPSK MODULATION, USING NONLINEAR DYNAMICS METHODS
Authors:   National Research Nuclear University MEPhI, Gavrishev A.A. , Osipov D.L. ,   North-Caucasus Federal University
Published: January 2023

This article evaluates the stealth of signals based on the technology of orthogonal frequency discrete multiplexing (OFDM-signals) and BPSK modulation, using statistical methods for assessing stealth, represented by methods of nonlinear dynamics (Hurst exponent and BDS-statistics). As a result of the conducted studies, it was found that OFDM-signals based on BPSK modulation, in general, have insufficient stealth, since they can be detected using the Hurst exponent and BDS-statistics. The features of research using the Hurst exponent and BDS-statistics of OFDM-signals based on BPSK modulation are shown. Among such features, it should be noted that with an increase in the number of subcarriers, the values of the Hurst exponent and BDS-statistics also increase, in particular, the value of the Hurst exponent approaches values corresponding to the concept of white noise, and the value of BDS-statistics approaches values indicating that OFDM-signals with a large number of subcarriers can potentially be attributed to chaotic signals. From the above results, it can be seen that with an increase in the number of subcarriers OFDM-signals, some complication of the structure of the transmitted signals occurs, which, however, does not lead to an increase of stealth. The results obtained coincide with well-known studies from this field, which show that OFDM technology based on harmonic carrier modulation methods does not provide data transmission stealth. Further directions of research on the evaluation of the stealth of OFDM-signals using nonlinear dynamics methods are briefly described, in particular, the study of OFDM-signals with other types of modulation and a different number of subcarriers, as well as the study of OFDM-signals, which use additional methods to increase stealth.
DEVELOPMENT OF A CLASSIFICATION ALGORITHM BASED ON AN ACADEMIC DATA MODEL USING HYPERPARAMETRIC TUNING FOR HIRING TEACHERS AT IRAQI UNIVERSITIES
Authors:   Voronezh State Technical University, Zaidan Al-Dulaimi Omar
Published: January 2023

In this paper, the researcher proposes a classification method for any employment opportunity in Iraqi universities using complete placement data by category for a dataset of employment in Iraqi educational institutions. The analysis of the scientific literature shows that this problem has not been sufficiently investigated and requires its solution. Developing a classification method based on genetic algorithms to get the best results to solve the problem of hiring new professors in Iraqi universities, getting accurate results and comparing several methods to solve this problem. The researcher tries to study learning classification algorithms with a teacher, such as logistic regression, Support Vector Classifier (SVC), Closest Neighbors KNN, Gaussian Naive Bayes algorithm, decision tree, random forest, gradient boosting and linear factor analysis (LDA). Hyperparameter optimization is also used for controlled algorithms to achieve better results. According to the proposed algorithms, the reliability and accuracy of the results obtained was ensured by a five-fold check. Results. Experimental results have shown that by adjusting hyperparameters in Linear Discriminant Analysis (LDA), it is possible to increase the accuracy of the results, as well as get a better result compared to other algorithms. The analysis criteria such as average accuracy, average score, G-Mean and Average ROC AUC were taken into account. It is according to the first three criteria that linear discriminant analysis demonstrates the highest accuracy of evaluation. It is established that among all the classification algorithms used, the classification of linear discriminant analysis is comparatively more accurate in all other scenarios of classification algorithms. It was found that adding the lsqr parameter solver and 0.81 shrinkage to linear discriminant analysis can improve performance. The article proves that the proposed classification algorithm based on the academic data model is able to solve the problem of hiring teachers at the university.
METHOD FOR CALCULATION MAXIMUM THROUGHPUT HIDDEN CHANNELS IN SYSTEMS OF STEGANOGRAPHIC COMMUNICATIONS
Authors:   Azerbaijan Technical University, Ibrаhimov B.G. , Tahirova K.M. ,   National Defense University
Published: January 2023

An analysis of the performance indicators multiservice telecommunication networks using the sixth technological order based on the NGN (Next Generation Network) architectural concept and future FN (Future Networks) networks was carried out to build high-performance steganographic systems with increased covert channels through-put, ensuring the achievement of a certain level information security. Comprehensive criteria for the efficiency the functioning steganographic systems are considered and the channel capacity of the steganosystem as a communication system with packet switching is selected. On the basis of the study, a new approach to constructing a method for evaluating complex indicators of the quality of steganographic communication during embedding and extracting hidden data is proposed. The quality of steganographic communication refers to the properties steganocommunication to ensure the efficiency of the system, both timely and reliable transmission of messages. On the basis of the proposed approach, the effectiveness steganographic systems in the construction of covert channels for the transmission secret data transmitted over communication channels was studied. Taking into account the new entropy approach, a method for calculating the indicators of the latent throughput steganographic systems in packet- switched communication networks has been created. As a result of the study calculation method, important analytical expressions were obtained for evaluating complex indicators throughput steganographic systems, such as the throughput of covert channels, the maximum possible value of the performance of a binary source packets, the average packet transmission time with the proposed coding scheme, and the residual throughput of the communication channel. Based on the results obtained, covert channel performance in steganographic systems was simulated using the Communications Toolbox package, an extension of the standard Matlab environment designed for calculating and modeling communication systems. The table contains indicators of the residual throughput of the system and the parameters of covert channel, taking into account the lengths of the headers of the network and channel levels of the open systems interaction models. With the considered method counteraction, a graphical dependence of the maximum value residual system throughput on the covert channel parameter is plotted. On the basis of the analysis, actual problems are identified, recommendations are developed to improve the efficiency of the use steganographic systems architectures for multiservice telecommunication networks.
DETECTION OF GRADUAL FAILURES TAKING INTO ACCOUNT PREVENTIVE TOLERANCES AND COST-EFFECTIVE REDUNDANCY OF MEASUREMENT CHANNELS
Authors:   Military  Academy of communications named after S. M. Budyonny, Abramkin R.V. , Vinogradenko A.M. ,   Military  Academy of communications named after S. M. Budyonny, Slepov S.N. ,   16 Central research and testing Institute of the Russian Ministry of defense, Dross V.A. ,   Military  Academy of communications named after S. M. Budyonny
Published: January 2023

Currently, monitoring the technical condition of complex technical systems, such as electrical equipment of communication equipment, is a long and non-automated process that is carried out by operators directly at the control objects themselves. This circumstance has a negative impact on the timely detection of failures of the controlled object. One of the most difficult to detect is phasing out. For timely detection of the fact of its occurrence, it is necessary to create a control system that works in a permanent mode with pre-entered preventive tolerances. The purpose of the work is to develop a proposal for the formation of the optimal value of the preventive tolerance of the controlled parameter for detecting the fact of gradual failure and determining its probabilistic characteristics, taking into account the reservation of measurement channels. Methods used: detection of gradual failures is random and the best results are obtained using methods of statistical decision theory, the use of which assumes the presence of complete a priori information about the probability distributions of the output values of the controlled parameters. The novelty of the work is to increase the reliability and accuracy of monitoring the technical condition of complex technical objects to ensure their reliability by reserving measurement channels, which allows you to increase the accuracy of detecting gradual failure of the controlled object by optimizing the value of preventive tolerances. Result: the use of cost-effective redundancy of measurement channels, as well as the use of preventive tolerances, allows more accurate assessment of the technical condition of the control object and make a conclusion about the probability of gradual failure. Optimization of the threshold of preventive admission allows you to minimize the probability of making an erroneous decision. Practical significance: the results of the work can be used in the process of monitoring the technical condition of complex technical systems, which will avoid accidents.
SOFTWARE PACKAGE FOR MODELING HF-BAND PACKET RADIO NETWORKS
Authors:   JSC ", Dorogov A.Yu. ,   Information and telecommunication technologies (Inteltech)", Yashin A.I. ,   JSC "Information and telecommunication technologies (Inteltech)"
Published: January 2023

It is noted that the complexity and constant variability of the ionosphere structure, the presence of many factors affecting the propagation of radio waves in such an environment, as well as the complex topology of communication networks lead to the need the computer modeling of data transmission in HF-band networks. The existing models of representation of ionospheric processes and digital radio channels are described. It is shown that to solve the problems of designing a radio data transmission network, complex modeling is necessary, taking into account the network topology, signal propagation losses in the radio channel, noise level, type of digital modulation, and radio forecast of communication conditions. In this paper, we consider a modeling complex for packet radio networks of HF-band data transmission with changing communication conditions. The complex consists of a set of interacting models implemented in the Matlab software environment. The software model for predicting communication conditions complies with ITU-R recommendation P. 533–13 of the International Telecommunication Union (ITU). The description of the model for the "Point-to-point" and "Area" modes is given and the results of its application for calculating extended radio lines are shown. The initial data and system parameters of the model are described. A model of the HF-band digital radio channel is presented. The communications System Toolbox package, which is part of the Matlab software environment, is used for this modeling. The model's input and output data are described. A model of Ionospheric Wave Frequency Dispatcher service of the radio network has been developed. This model is intended for building a wave schedule for stable operation of HF radio lines in the network. The rules for building a two-frequency and multi-frequency wave schedule are described. A scheme for modeling the operation of a packet radio network under changing communication conditions is proposed. The complex allows you to evaluate the probabilistic and temporal characteristics of radio lines and zonal radio coverage depending on geographical coordinates, time, month, solar activity and selected system parameters for a period of up to one year. Examples of using the modeling complex are given. The purpose of this work is to formulate the problem of simulation of HF radio networks under changing communication conditions.
ALGORITHM FOR TRAJECTORY INFORMATION PROCESSING OF RADAR MEASURING COMPLEXES BASED ON K-MEANS CLUSTERING
Authors:   JSC «Kronshtadt technologies», Kondibaev N.S. , Kupriyanov N.A. ,   Mozhaisky  Military Space Academy, Kurakin S.Z. ,   Mozhaisky Military Space Academy
Published: January 2023

The problem situation caused by the need to improve the accuracy of determining the location of observed space objects by radar measuring complexes is considered. It is shown that the accuracy characteristics of radar measuring systems depend on the contribution of various measurement errors, the most significant of which for modern highly informative observation tools are atmospheric, determined by helio-geophysical conditions of operation. It is noted that the currently applied approaches to compensation of atmospheric measurement errors do not allow taking into account the heliogeophysical conditions of operation of radar measuring complexes with high time and spatial resolution. It is shown that when processing coordinate information, sporadic changes in heliogeophysical operating conditions are not fully taken into account, which leads to an increase in errors in measuring the location of space objects and a decrease in the information capabilities of radar measuring complexes. The idea of using the discrepancy of measurements by the radar measuring complex of the location of space objects for which there is a priori coordinate information is considered. The results of combining groups of space object location measurements using cluster analysis methods are shown. The results of computer modeling are presented and it is shown that the proposed approach allows us to determine the areas where the influence of heliogeophysical conditions increases the measurement errors. The main calculation relations are described and the stages of the algorithm for trajectory processing of information from radar measuring complexes based on clustering by the K-MEANS method are shown. Further directions of using the results of the algorithm are proposed, which con sist in using data on formed clusters for processing information about space objects for which there is no a priori coordinate information. It is shown that the proposed approach can be applied in order to improve the information capabilities of radar measuring systems.