bluuebunny/crossref_metadata_2025_split huggingface dataset:
МОДЕЛЬ ЭЛЕКТРОННЫХ ПИСЕМ В ЗАДАЧЕ ОБНАРУЖЕНИЯ СПАМА
Authors: Корелов С.В. , Петров А.М. , Ротков Л.Ю. , Горбунов А.А. 
Published: February 2025

В статье предложена генетическая модель электронных писем, учитывающая их содержание, для обнаружения спама. В качестве базового подхода для формирования модели электронных писем был выбран генетический подход к формированию математических моделей текстов, зарекомендовавший себя для решения различных задач.
Introduction. Currently, one of the popular information delivery methods and an important communication means is email message that exhibits numerous advantages like accessibility, efficiency and low cost, and can convey large amounts of data of various types. One of the typical business risks associated with emails is spam. Existing spam detection algorithms are typically based on the proven basic statistical processing and do not completely take into account the content of emails.
исследование влияния толщины тонких плЁнок РАЗЛИЧНОГО СОСТАВА, получаемых методом магнетронного распыления, на их оптическиЕ спектры пропускания
Authors: Козырев А.Г. , Мороз А.В. , Филимонов В.Е. 
Published: February 2025

В работе представлены измеренные оптические спектры пропускания плёнок графита, нитрида алюминия и оксида меди различной толщины, полученных методом магнетронного распыления. Показана зависимость оптического спектра пропускания плёнок графита от их толщины. Также приведены спектры пропускания комбинаций плёнок нитрида алюминия и оксида меди.
Introduction. The existing methods for calculating thin-film interference filters are based on the priori known data on the thickness and refractive index values for each layer. The increasingly widespread method of magnetron sputtering for producing thin-film interference filters exhibits a number of features - one of them is that the refractive index of a thin film can vary within a fairly wide range. Thus, the aim of the research, which is to experimentally measure the optical transmission spectra of graphite, aluminum nitride and copper oxide films of various thicknesses, produced by magnetron sputtering, is topical. To achieve the aim, a number of tasks were posed: 1) Studying transmission spectra of thin films of aluminum nitride (AlN), copper oxide (CuO) and graphite (C) of various thicknesses, produced by magnetron sputtering; 2) Measuring thickness and surface structure of the thin films with the use of atomic force microscopy; 3) Studying transmission spectra of combinations of the produced films. Experimental technique. AlN, CuO, C thin films of various thicknesses were produced on K-8 glass substrates by magnetron sputtering. The transmission spectra of the thin films were recorded with the use of the SF-2000 spectrophotometer. Findings. Studies showed that graphite films change their optical characteristics, in particular, the short-wavelength boundary of the transmission spectrum at 218 nm, depending on the thickness in the range from 125 to 350 nm. These changes can be caused by the change in their crystal structure during growth. On the other hand, in AlN and CuO films produced by the method of reactive magnetron sputtering, this tendency was not observed, despite the fact that the range of thicknesses of these films overlaps the range of thicknesses of carbon films. These films are characterized only by a decrease in the transmittance with an increase in their thickness. The obtained transmission spectrum for combinations of aluminum nitride and copper oxide with graphite films allows to shift the transmission boundaries in the short-wavelength and long-wavelength parts of the spectrum and, due to this, increase the selectivity of the spectra of these thin-film structures.
О ВЗАИМОСВЯЗИ ПОКАЗАТЕЛЕЙ ХАОТИЧЕСКОЙ ДИНАМИКИ И СТАТИСТИЧЕСКИХ ХАРАКТЕРИСТИК ПСЕВДОСЛУЧАЙНЫХ СИГНАЛОВ НА ОСНОВЕ НЕЛИНЕЙНЫХ СИСТЕМ ЛОРЕНЦА И ЧУА
Authors: Зуев М.Ю. , Кафаров К.М. , Логинов С.С. 
Published: February 2025

В данной работе представлены статистические характеристики двоичных последовательностей, полученных на основе модифицированных с использованием квазирезонансных воздействий на параметры временной сетки динамических систем Лоренца и Чуа. Выполнена оценка старшего ляпуновского показателя данных систем. Проведён анализ автокорреляционных и взаимно корреляционных функций двоичных последовательностей, формируемых на основе исследуемых систем, получены оценки уровней их боковых лепестков, а также выполнены тесты качества последовательностей FIPS-140. Результаты работы могут быть использованы для разработки современных систем связи и решения задач статистического моделирования.
Introduction. Currently, systems with dynamical chaos are used to describe nonlinear processes in various fields of physics, biology, engineering, and radioelectronics. Generation of pseudorandom sequences based on the chaotic system is topical for state-of-the-art data transfer systems. The aim of the research is to analyze the relation between the high order Lyapunov exponent and the statistical characteristics of binary pseudo-random signals formed on the basis of dynamical Lorentz and Chua systems under conditions of quasi-resonant effects on the time grid parameters. Findings of the mathematical modeling. The statistical characteristics of pseudo-random signals which are generated on the basis of dynamical Lorentz and Chua systems with quasi-resonant effect were analyzed. The high order Lyapunov exponent for different variations of the modulation depth was estimated. The probabilities of passing the FIPS 140-2 tests were calculated. Conclusions. As a result of the work, there was established a qualitative relation between the high order Lyapunov exponent of the dynamical systems of Lorenz and Chua and the statistical characteristics of binary pseudo-random signals formed on their basis under conditions of quasi-resonant influences on the time grid parameters.
ПОМЕХОУСТОЙЧИВОСТЬ СИСТЕМЫ СВЯЗИ С ДВОИЧНОЙ АПЛИТУДНОЙ МАНИПУЛЯЦИЕЙ В УСЛОВИЯХ ДЕЙСТВИЯ КОМПЛЕКСА ПОМЕХ ПРИ НЕЛИНЕЙНОЙ ОБРАБОТКЕ СИГНАЛА В ДЕМОДУЛЯТОРЕ
Authors: Есипенко В.И. , Жаринов Ф.В. , Сюваткин А.Д. 
Published: February 2025

Проведён анализ помехоустойчивости системы связи с двоичной амплитудной манипуляцией при переходе на вторую гармонику полезного сигнала до детектирования аддитивной смеси сигнала, гауссовского шума и сосредоточенной по спектру помехи. Приведены результаты компьютерного моделирования. Показано, что при переходе на вторую гармонику помехоустойчивость существенно улучшается.
Problem statement. Protection against interferences is one of the main problems of radio engineering, radio physics, various communication systems and other technical areas of data transmission and reception. Various organizational and technical measures have been developed to reduce the harmful effect of interferences. However, the rapid increase in the number of communication systems and especially in the presence of a cluster of interferences, including deliberate ones (radio jamming), have boosted the urgency of the problem. The aim of the work is to show that digital communication systems open up new opportunities towards the high noise immunity of useful signal reception: in particular, the use of nonlinear processing of a signal and noise mixture in a demodulator, followed by narrowband filtration at the second harmonic of the carrier of the useful signal. Findings.There is carried out an analysis of the noise immunity of a communication system with binary amplitude-shift keying (BASK) during the tuning to the second harmonic of the useful signal before the detection of an additive mixture of signal, Gaussian noise and narrowband interference. The results of computer simulation are presented. It is shown that tuning to the second harmonic significantly improves the noise immunity. Practical significance. The proposed method for processing a useful signal in the presence of a cluster of interferences can be used as a basis for the development of promising systems for data transmission and reception.
Разработка модели гибридной системы обнаружения вторжений
Authors: Золотарев А.И. , Пуртов Д.Н. , Сидоркина И.Г. 
Published: February 2025

В статье представлено развитие сигнатурного подхода обнаружения вторжений на основе кластеризации и дерева решений. Также предложен оригинальный способ разработки аномального подхода к обнаружению вторжений, разработана модель функционирования гибридной системы обнаружения вторжений, отличающаяся от известных большей точностью обнаружения, меньшим процентом ложных тревог, приоритезацией сетевых пакетов для анализа, а также решающей основные недостатки аномального и сигнатурного подхода.
Introduction: Alongside the development of the Internet, network security has become a crucial requirement. Bugs in software and operating systems result in an increasing number of previously unknown intrusions discovered every day. The harm caused by these intrusions is becoming more and more dangerous. Firewalls can't ensure a complete protection of the network, because they prevent external threats and don't maintain internal attacks. Intrusion detection systems (IDS) solve this problem. The aim of the research is to develop a model of a hybrid intrusion detection system that will use a combination of improved detection methods based on anomalous and signature approach to increase detection accuracy and reduce the level of false alarms. Tasks: development of an improvement for the signature detection method, development of a unique anomaly detection method, development of a unique hybrid model of the intrusion detection system. Methods. To improve the signature detection method, we used machine learning, in particular the C5 algorithm, as well as decision trees. In addition to this, there are presented: storing signature rules with their partial structure in the MongoDB database, the process of clustering rules, building and detecting with the use of a decision tree. There are presented a unique method for detecting anomalies in network traffic with the use of machine learning methods and the theory of finite automata. Besides, there are shown: the detection process with the use of the sliding window technique, machine learning and time automaton; storage of trained models in the MongoDB database, the process of loading anomalies into the signature database with the use of RabbitMQ. Findings. The hybrid IDS with increased detection accuracy and reduced false alarm rate was developed. The developed system was compared with the well-known open-source solutions Snort and Suricata. The signature detection method was improved with machine learning and decision trees, and a unique anomaly detection method that uses machine learning and a time automaton was presented. It allows to detect previously unknown attacks. The practical significance of the work is the partial implementation of the developed system for the Infologistik24 LLC company.
Политипные модификации упорядоченной коаксиальной нанотрубки
Authors: Валеева Д.Н. , Халитов З.Я. , Файзуллин Р.Р. 
Published: February 2025

Предлагается концепция построения номенклатуры политипов упорядоченной коаксиальной нанотрубки, развитая на основе их развёрток с использованием подхода традиционной кристаллографии плоских слоистых кристаллов. Рассматриваются сдвиговые, хиральные и радиальные политипы как наборы цилиндрических решёток, эквивалентных идеальным решёткам соответствующих политипов. Получены координаты атомов политипных модификаций.
Introduction. Current experience in the synthesis of nanotubes and the study of their electronic properties, as well as successful implementation of nanoelectronic elements based on them, have risen the necesity to select nanotubes of the required structure to supply appropriate enterprises; the selection is made according to the diffraction patterns of nanotubes in the field of an electron microscope. The most important structural parameter of a nanotube, which determines the nature of its diffraction pattern, is the polytype modification, which depends on the mutual packing of the layers. Meanwhile, the available descriptions of coaxial cylindrical gratings are fragmentary and unsystematic, and there is no complete nomenclature of their polytypes. The aim of the research was to develop a concept for constructing polytype modifications of ordered coaxial nanotubes based on their unfolding with the use of the approach of traditional crystallography of flat layered crystals. Thus, the objectives of the study were to identify the nomenclature of possible polytypes, their correct crystallographic determination, and to obtain the cylindrical coordinates of atoms. An analysis of the problem allowed us to distinguish three groups of polytype modifications of right-handed and left-handed multilayer cylindrical gratings: chiral, shear, and radial. We obtained cylindrical coordinates of atoms of the indicated polytype modifications of the coaxial nanotube. Conclusions. Three groups of T-layer polytype modifications of ordered coaxial nanotubes have been identified: chiral, shear, and radial; their unambiguous crystallographic definition and cylindrical coordinates of atoms have been obtained. Research findings allowed to select nanotubes of the required structure, where the chiral polytype determines, among other things, the types of conductivity of the tube layers, the shear polytype determines the spatial symmetry group, that is, the nature of the electronic spectrum, and the radial polytype determines, among other things, the band gap.
Организация защищённой системы видео-конференц-связи с использованием квантовой коммуникации
Authors: Глозштейн Д.А. , Сидоркина И.Г. 
Published: February 2025

В статье предложена экспериментальная схема применения квантового ключа в традиционной системе видео-конференц-связи. В соответствии с этой схемой, в традиционную систему видео-конференц-связи был встроен квантовый шлюз. Благодаря этому данные, передаваемые через систему видео-конференц-связи, могут быть зашифрованы квантовым ключом, генерируемым таким шлюзом. Небольшая скорость генерации квантового ключа компенсируется применением процедуры его расширения, что позволяет сохранять нормальное качество видеоизображений.
Introduction. Ensuring the security of video conferencing (VC) against various forms of attacks is crucial. Utilizing quantum communication for generating encryption keys presents a potential solution for enhancing the security of video conferencing. This research aims at developing a comprehensive design for a secure video conferencing system that incorporates both classical and quantum communication. The primary objectives involve designing a classical video conferencingsetup, integrating tools for establishing a quantum data transmission channel, selecting an efficient and versatile quantum key distribution (QKD) protocol, and addressing the challenges of matching data transfer rates and encryption key generation while maintaining video quality. Methodology. The adoption of QKD technology is proposed to achieve secure video conferencing due to its inherent data transmission security. A dedicated key generation algorithm is proposed for this technology. Results. The creation of a simple video conferencing topology involved the integration of a three-node quantum communication network with a classical network. In the context of a video conferencing system, a "one-time pad" mechanism was proposed for implementing quantum keys. An evaluation of the key consumption volume for video conferencing revealed an insufficiency in key generation volume. To address this limitation, a key expansion procedure based on the "sliding window" principle was introduced to meet system's requirements. The algorithm's efficacy in video data transmission was assessed by analyzing the impact of the quantum key error rate on the quality of video image transmission. The quality of video images was measured using the peak signal-to-noise ratio (PSNR) for both the original and decoded images. The findings showed that the quality of video images remained acceptable before and after encryption and decryption. Conclusion. The feasibility of utilizing a quantum key within video conferencing systems has been successfully demonstrated. This serves as a foundational concept for establishing more intricate video conferencing systems incorporating quantum key encryption.
ПРИМЕНЕНИЕ РОСТОВЫХ ВЕЩЕСТВ ДЛЯ ВЫРАЩИВАНИЯ ПОСАДОЧНОГО МАТЕРИАЛА СОСНЫ ОБЫКНОВЕННОЙ
Authors: Кабанова С.А. , Данченко М.А. , Шишкин А.М. , Крижановская Е.И. 
Published: February 2025

Целью исследований являлось определение оптимальных способов предпосевной обработки семян сосны обыкновенной и повышения плодородия почвы в лесном питомнике Северного филиала Республиканского лесного селекционного центра, расположенного в Акмолинской области. При изучении качества семян выявлено, что они давали дружные всходы и энергия прорастания практически не отличалась от всхожести. Первые ранги по всем изученным показателям роста сеянцев заняли варианты опытов с поливом почвы Гуматофосфатом и ЭридГроу, и посевом сухих семян. Определено, что повышение плодородия почвы путём внесения ростовых веществ больше влияет на рост сеянцев, чем только замачивание семян в стимуляторах в ходе предпосевной обработки, хотя неплохие результаты показывают и данные варианты.
The goal of the research.The purpose of the studies was to determine the optimal methods of presowing processing of the seeds of Pinussylvestris L. and to increase the fertility of the soil in the forest nursery. Objects Oneyearold see dlings of Pinussylvestris L. grown from the improved selective seeds in the nursery of Northern branch of Republican Forest Selection Centre, located in Akmola region, were the object of the studies. Results. When studying the quality of the seeds it was revealed that they gave quickly developing plantlets and the energy ofintergrowth almost did not differ from the germinating ability. The variants with steeping of the seeds in Humatophosphate Trichocyne for 122 hours (93), Humate 7 for 6 hours (91), in Baikal Trichocyne (1 2 hours) (90) and Humate 7 Trichocyne (62 hours) (90) hadthe maximal laboratory germinating ability. The variants of the experiment, having high laboratorygerminating ability of the seeds, also differed by big indices of the height of the seeds. It indicates a prolonged effect of presowing cultivation of the seeds including on the growth of the seedlings. The variants of experiments with watering of the soil byHumatophosphate and AridGrow and sowing of dry seeds took the first ranks on all the studied indices of growth of the seedlings. The seedlings which were grown from the seeds steeped in Baikal (1.5 hours), Zircon (3 hours), Zircon Trichocyne (62 hours) andHumatophosphate (12 hours) had bigger values of height, length and mass of stipes and roots. Conclusions. It was determined that the increase of fertility of the soil by means of application of growth substances influenced more upon the growth of the seedlings than only steeping of the seeds in stimulants in the course of presowing processing, although these variants showed quite good results.
ОЦЕНКА АНТИМИКРОБНОЙ АКТИВНОСТИ ЭКСТРАКТА КОРЫ ОСИНЫ
Authors: Конюхова О.М. , Дегтярева К.А. , Михайлова Е.Н. , Пачкунов Д.М. 
Published: February 2025

Приведены данные лабораторных исследований по поиску растительных препаратов, обладающих антибактериальным действием. Обнаружено наличие высокой чувствительности четырёх видов бактерий (Escherichia coli C 600, Pseudomonasae ruginosa, Salmonella, Bacillus cereus) к водному раствору спиртового экстракта коры осины (Populus tremula L.), который можно рекомендовать в качестве перспективного источника биологически активных веществ. Установлены значения минимальной подавляющей концентрации (МПК) препарата для всех исследованных микроорганизмов.
Introduction. The work was aimed at studying the antimicrobial activity of aspen extract, which has an antibacterial effect depending on the boundary values (herbal medicinal raw materials taken from four test areas in relation to the cardinal directions). The problem of the influence of secondary metabolites in relation to the sides of the tree trunk light on the antimicrobial activity of the Populus Tremula is not touched upon. The aim of the study is to compare the antimicrobial activity in the extract of the aspen bark (Populus tremula) with respect to the cardinal directions for further rational harvesting of bark with a high content. Materials and methods. As the object of study, samples of aspen bark of Populus tremula, harvested by hand from different sides of the tree trunk in AugustOctober 2016 in the Shulka forest area of the Orsha district of the Republic of Mari El, were used. Results. The study revealed the effect of aspen bark extract on the growth of strains of microorganisms (gramnegative bacteria Escherichia coli C600, Pseudomonasae ruginosa, Salmonella and grampositive Bacillus cereus), which increased in proportion to the concentration of rutin in the cells. Significant antimicrobial activity of the extract is due to its high content of phenolic compounds such as rutin. In the studied aspen bark, taken from the North side, the content of flavonoids in terms of rutin was 0.196 , which in relation to other parts of the plant bark, is higher. It can be assumed that the flavonoids that make up the extract of aspen, determine its significant antimicrobial properties. The least inhibitory effect on the growth of strains of microorganisms was observed in the extract of aspen bark collected from middleaged plants (trial area 2), which suppressed the growth of microorganisms only at a high concentration of 6. Conclusion. It is of interest to further study the mechanism and spectrum of antimicrobial action of aspen bark extract, as well as the direction of selection of extraction conditions under which the sum of the isolated substances will have maximum antimicrobial activity. Aspen bark extract can be recommended as a promising source of biologically active substances with antimicrobial activity, which can be used as a prevention of infectious diseases, both animals and humans.