bluuebunny/crossref_metadata_2025 huggingface dataset:
Synthesis and cytotoxic activity investigations of DNA-tropic 4-dimethylaminostyryl derivatives of N-methyl-pyrimidobenzimidazolium iodides
Authors: Paponov B. V. , Sokolova A. N. , Zdereva P. S. , Tsymbal S. A. , Shemchuk O. S. , Maystrenko D. N. , Molchanov O. E. , Semenov K. N.
Published: December 2024

Introduction. The creation of new compounds with pronounced cytotoxic activity is one of the priority goals in modern medicinal chemistry due to the emergence of multidrug resistance (MDR) to existing chemotherapy drugs for many types of tumour diseases.

The objective was the synthesis of DNA-tropic heterocyclic systems containing a quaternized nitrogen atom and one or two styryl moieties as side chains. The synthesized compounds must have pronounced cytotoxic activity and moreover bind with DNA macromolecules effectively.

Methods and materials. In this paper, 2 new compounds containing a 10-methyl substituted pyrimidobenzimidazolium core and 1 or 2 4-dimethylaminostyryl moieties as side chains were synthesized. The structures of targeting compounds were confirmed using mass spectrometry and NMR spectroscopy methods. The electronic spectra of these compounds were studied in this work. The investigations of targeting compounds proved their ability to bind with DNA macromolecules. The cytotoxicity of the synthesized compounds was studied on four cell lines.

Results. The target compounds were obtained in four-stage synthetic procedure. The purity of the target products was confirmed using NMR spectroscopy and mass spectrometry. The synthesized compounds are effective cyanine dyes with absorption maxima in the dark red and dark violet regions of the visible spectrum for mono and bis 4-dimethylaminostyryl derivatives, respectively in the its electronic absorption spectra. Both of the synthesized compounds can form a stable complex with DNA macromolecules with a significant deepening of the colour in the solutions. The compounds showed pronounced cytotoxic activity in in vitro experiments on a number of cancer-transformed cell lines. The target compounds were shown a high cytotoxic activity against triple-negative breast cancer cells, which are extremely resistant to chemotherapy.

Conclusion. 4-Dimethylaminostyryl derivatives of N-methyl-pyrimidobenzimidazolium iodides require a further study as new promising compounds with pronounced antitumor activity.
Parent concern and awareness of topical corticosteroid use in pediatric patients with atopic dermatitis in Makkah region
Authors: Al-hayli Ahmed , Alsohabi Dima , Mahfouz Huda , Alrizqi Rudhab , Alfaqih Mohammad , Alrashdi Atheer , Alshreef Salma , Algallaf Sarah , Alamri Layla , Alkalash Safa
Published: December 2024

Objective: This study aimed to assess parents' concerns and awareness about using topical corticosteroids for their children with eczema in the Makkah Region, Saudi Arabia.
Methods: In the Makkah region, a cross-sectional study was carried out using a convenient sample of 221 parents. To gather the research data, a structured online questionnaire that required consent and ensured data confidentiality was employed.
Results Mothers represented 71% (n = 157) of the sample. The main source of information about topical corticosteroids was dermatologists (71%, n = 157). Half of the sample used topical corticosteroids for children for 3 months or more. The most common indication for topical corticosteroids was eczema (69.2%, n = 153). About 81% (n = 178) had concerns about their application to specific skin, like the eyelid. Widowed was associated with a significantly lower overall steroid phobia score (95% CI = -9.23 to -1.79, p = 0.004). Highly educated participants exhibited a significantly higher overall steroid phobia score (95% CI = 1.05-7.78, p = 0.011). Mothers demonstrated a significantly higher behavior score (95% CI = 0.36-1.55, p = 0.002).
Conclusion: The study identified average levels of parental fears and knowledge regarding topical corticosteroid treatment in pediatric patients in the Makkah region. Corticosteroid fear was more prevalent among mothers and educated parents. Additional study is needed to better understand and treat corticosteroid phobia in various groups and contexts.
Assessment of quality-of-life among type 2 diabetic population in Saudi Arabia: a national cross-sectional study
Authors: Alharbi Jaber , Alotaibi Shoug , Alghamdi Esraa , Almasoudi Manal , Aleid Fatimah , Alghanmi Nawaf , Alshehri Reema , Alshakhs Mohammed , Albarqi Mohamed
Published: December 2024

Objective: This study aimed to assess the quality of life (QoL) among diabetic patients in Saudi Arabia using a validated Arabic Diabetes Quality of Life (DQoL) questionnaire.
Methods: A cross-sectional survey was conducted in March 2024 using convenience sampling across Saudi Arabia. Diabetic participants completed an online survey via social media and Google Forms. The DQoL questionnaire included demographic information and 29 questions across satisfaction, impact, and worry domains.
Results: The study included 366 participants, predominantly male (67.8%) and aged 25-34 years (27.3%). Overall, 87.2% reported high QoL. High satisfaction, impact, and worry ratings were reported by 65.8%, 64.8%, and 67.8% of participants, respectively. Significant factors influencing QoL included gender, education level, social status, and income (p-value < 0.05), with better QoL associated with males, higher education, married status, and higher income.
Conclusion: Diabetic patients in Saudi Arabia generally reported high QoL, influenced by sociodemographic factors. Targeted interventions are needed to improve QoL in specific subgroups, such as females and those with lower education or income levels. Further research should explore the underlying factors affecting QoL in diabetic patients.
Impact of random blood glucose on visual acuity in Riyadh, Saudi Arabia
Authors: Badawi Amani , Albatati Abdulaziz , Hussamuldin Abdulrahman , Alanazi Razan , Alotaibi Layan , Alshathri Fahda , Alsaleem Abdullah , Alrowili Fahad , Alkhudairy Suliman , Alomari Abdulaziz , Alshelwi Mohammed
Published: December 2024

Objective: This study aimed to determine the effect of hyperglycemia on visual acuity in Saudi Arabia.
Methods: A cross-sectional survey was conducted by volunteers from Al-Maarefa University at a mall in Riyadh, involving a sample of 148 visitors, including both male and female participants as well as individuals with or without diabetes. The study included adults aged 18 years and older. Participants were interviewed to obtain information regarding their age, gender, and diabetes status.
Results: The average age of participants was 38 years, with a mean random blood glucose (RBG) level of 112.81 mg/dl, revealing a diabetes prevalence of 12.84% among the cohort. Regarding visual acuity in the affected eye, the predominant measurement recorded was 6/9. A statistically significant correlation was observed between age and RBG levels in nondiabetic participants (p-value = 0.015).
Conclusion: The findings demonstrated a significant statistical correlation between age and RBG levels. Additional research is warranted to elucidate the factors contributing to hyperglycemia and enhance awareness of the complications associated with prolonged hyperglycemic states.
Efficacy of telemedicine versus face-to-face intervention in management of obesity: a systematic review and meta-analysis
Authors: Mohamad Rofayda , Alhuail Sadeem , Alazmi Alhanouf , Alazmi Amal , Ibrahim Mohammed , Alaseel Hussain , Almutairi Rasha , Alnajdi Raghad , Alblaihi Sultan , Alshalwi Sultan , Khalifah Abdulaziz
Published: December 2024

Obesity is a serious public health issue that requires appropriate management solutions. Telemedicine might be a viable alternative to traditional face-to-face therapies; however, its effectiveness in obesity management is unknown. This systemic review aimed to assess the efficacy of telemedicine versus in-person therapies for obesity management, with an emphasis on weight loss, related health outcomes, and cost-effectiveness. A systematic review and meta-analysis were conducted to look into randomized controlled trials comparing telemedicine with face-to-face interventions for obesity management. The primary outcomes included weight loss, body mass index (BMI) decrease, systolic blood pressure (SBP) reduction, and HbA1c reduction. Secondary results included cost-effectiveness. Four studies, totaling 2,374 participants, were included. Overall, no statistically significant differences were seen between telemedicine and face-to-face therapies in terms of weight loss, BMI decrease, SBP reduction, or HbA1c reduction. However, variation was detected in the cost-effectiveness assessments, indicating that the economic ramifications of telemedicine might differ. Telemedicine can be regarded as a realistic and successful alternative to in-person therapy for obesity control. While further study is needed to determine the cost-effectiveness of telemedicine, the results of this meta-analysis suggested that it is a potential way to combat the obesity pandemic.
Exploring the potential of vitamin C in complex regional pain syndrome
Authors: Almutawa Ahmed , Almutawa Sarah , Ahmed Ibrahim
Published: December 2024

Complex regional pain syndrome (CRPS) is a debilitating disease that frequently follows trauma or injury and is marked by autonomic dysregulation, chronic pain, and altered sensory perception. Though our understanding of its etiology has advanced, effective therapies are still unclear. Growing research has been done on the potential benefits of vitamin C for preventing CRPS. Vitamin C supplementation may prove to be a useful addition to the treatment of this disabling condition as our understanding of CRPS develops. The purpose of this narrative review is to provide an overview of the state of the field and investigate possible pathways that may underlie vitamin C's therapeutic benefits in CRPS. A comprehensive review was conducted using PubMed and Google Scholar with the keywords "CRPS," and "Vitamin C." Inclusion criteria were peer-reviewed, English language articles focusing on the role of Vitamin C in CRPS. Relevant studies were identified through database searches and manual reference checks. In conclusion, CRPS presents a complex clinical challenge, with its causes and mechanisms not clearly understood. Although pain management can offer partial relief, many patients still suffer from significant pain and impairment.
Dynamics of a Centrifugally Confined Fusion Plasma in Space Propulsion Applications
Authors: Carson Jerry , Sedwick Raymond
Published: December 2024

In centrifugal-mirror (CM) confinement, electric and magnetic fields are combined to confine the plasma within a rapidly rotating annulus of burning plasma fixed between two mirror magnets. This confinement scheme can be applied to a direct-fusion-drive propulsion system. Reactor dynamics refers to the thermodynamic and transport characteristics of fusion plasma confined by the centrifugal mirror. The objectives of the paper are to describe 1) the CM well potential and its relation to momentum confinement time, 2) the reactor power balance, 3) the role of electric and magnetic fields in power deposition necessary to affect the plasma rotation, 4) the characteristics and derivation of the critical Mach number for plasma rotation speed, 5) plasma transport in the vicinity of the critical Mach number, and 6) propulsion performance of CM plasmas. The development of these objectives is based on observations and analysis of results from a zero-dimensional (0-D)-model reactor model, where the 0-D model assumes constant properties in the plasma. The principal results are that the power needed to self-power the reactor can be estimated from knowledge of the applied magnetic and electric fields, and the reactor delivers the highest power density when operating near the critical Mach number.
Conceptual Design of Aircraft System Routing Architectures Using a Bio-Inspired Algorithm
Authors: Taneich Jumpei , Rinoie Kenichi
Published: December 2024

The increasing complexity of aircraft systems and the shift toward electrical aircraft are driving the introduction of entirely new concepts in aircraft systems and airframe design; it is therefore likely that the evaluation of aircraft systems and their integration with the airframe in the conceptual design phase will play an ever more crucial role in determining the feasibility of a newly proposed aircraft. This paper proposes a bio-inspired design algorithm for allocating space within the airframe to interconnections that supply aircraft systems. The proposed method is an adaptation of an existing pathfinding algorithm, with a novel mechanism to avoid overlap between systems that require segregation. The input required for the proposed method is likely to be available at the conceptual design phase. A detailed description of the proposed method is given, followed by a demonstration using a design problem based on an existing aircraft. Results of the demonstration show that the proposed method is capable of handling redundant systems and their segregation by reducing the overlap between different systems.
Planform Mesh Requirements for Fixed and Rotating Wing with Separation
Authors: Kolpitcke Amanda Grubb , Smith Marilyn J.
Published: December 2024

Grid generation techniques for unsteady finite wings and rotating blades with significant separation and dynamic stall analyses are largely based on infinite wing grid generation techniques, where span or radial spacing is considered of secondary importance to airfoil section spacing and can be large compared to the section longitudinal-normal spacing. An extensive finite wing planform mesh refinement, assessed for conditions where flow separation is present, indicates that there are recommended limits in the planform mesh aspect ratios related to the normal-chord cell aspect ratios, computed at the midchord location. The mesh recommendations have also been analyzed with respect to the accuracy provided by turbulence methods that are routinely applied today. These findings have been analyzed primarily for a translating wing but have been confirmed for a rotating system (rotor) with dynamic stall and separation present.
Enhancing Lattice Kinetic Schemes for Fluid Dynamics with Lattice-Equivariant Neural Networks
Authors: Ortali Giulio , Gabbana Alessandro , Atmodimedjo Imre , Corbetta Alessandro
Published: December 2024

A new class of equivariant neural networks is presented, hereby dubbed lattice-equivariant neural networks (LENNs), designed to satisfy local symmetries of a lattice structure. The approach develops within a recently introduced framework aimed at learning neural network-based surrogate models’ lattice Boltzmann collision operators. Whenever neural networks are employed to model physical systems, respecting symmetries and equivariance properties has been shown to be key for accuracy, numerical stability, and performance. Here, hinging on ideas from group representation theory, trainable layers are defined whose algebraic structure is equivariant with respect to the symmetries of the lattice cell. The presented method naturally allows for efficient implementations, in terms of both memory usage and computational costs, supporting scalable training/testing for lattices in two spatial dimensions and higher (in which the size of symmetry group grows). The approach is validated andtested considering 2D and 3D flowing dynamics, both in laminar and turbulent regimes. It is compared with group-averaged-based symmetric networks and with plain, nonsymmetric, networks, showing how the presented approach unlocks the (a posteriori) accuracy and training stability of the former models and the train/inference speed of the latter networks. (LENNs are about one order of magnitude faster than group-averaged networks in 3D.) The work in this paper opens toward practical use of machine learning-augmented lattice Boltzmann CFD in real-world simulations.
Hybrid Noise Control in Helicopter Cabin with Piezoelectric Stack Periodic Strut
Authors: Yue Huiyu , Xue Hongtao , Yang Dongpo , Wang Fengjiao , Lu Yang
Published: December 2024

Improving the vibration isolation performance of the helicopter’s main gearbox strut can reduce the vibration level transmitted to the aircraft body and the level of structural noise radiation. This article proposes a piezoelectric stack periodic strut (PSPS) scheme based on the piezoelectric stack and rubber periodic arrangement. Piezoelectric stack actuators can achieve active vibration and noise control, and the periodic structure of the piezoelectric stack actuators and rubber also has wideband stopband characteristics for reducing vibration and noise. Therefore, PSPS has active and passive hybrid control capabilities, which has advantages in vibration and noise reduction performance, the power of active control, volume and mass, etc. This article presents a full-parameter model that can describe the electromechanical coupling dynamic performance of PSPS. The correctness of the model was verified by the finite element software, and the concept of optimal isolation potential of PSPS was proposed and evaluated. Finally, the hybrid control capability of PSPS for single-frequency and wide-frequency noise was verified through experiments. The results show that compared with the noise level of the cabin using an ordinary strut, PSPS has wideband vibration reduction and noise reduction performance above 500 Hz, with a maximum noise attenuation exceeding 25 dB. When applying active noise control to the PSPS on the helicopter model, a control effect of 12.63–15.56 dB at 900 Hz was achieved.
Kripto Para Çalışmalarının Literatürdeki Eğilimi: Bibliyometrik Bir Analiz
Authors: Çomuk Pınar
Published: December 2024

Dijitalleşmenin bir sonucu olarak yeni bir teknolojiye ve potansiyele dayanan kripto para birimi günümüzde oldukça önemli bir olgudur. Kripto para sistemi, genel veya sınırlı amaçlı bir değişim aracı olarak kullanılması amaçlanan ve kriptografiden faydalanarak dijital bir defter kullanılarak muhasebeleştirilen bir sistemdir. Bu alanda yapılmış çalışmaların sayısı gün geçtikçe artmaktadır. Kripto para biriminin literatürünün kapsamlı bir şekilde incelemesi şu anki mevcut durumu göstermek ve gelecek vaat eden araştırma konularının anlaşılmasına yardımcı olacağı düşünülmektedir. Bu araştırmanın amacı, bibliyometrik analizi yöntemlerini kullanarak kripto para birimi literatürünün sistematik bir incelemesini sunmaktır. Bu bağlamda çalışmada, Web of Scince veri tabanındaki SCI-Expanded, SSCI ve AHCI indekslerinde taranan kripto para literatürü 2014-2021 yılları arasındaki 1258 döküman Excel ve VOSviewer yazılımları kullanılarak analiz edilmiştir. Çalışmadan elde edilen bulgular, SCI-Expanded, SSCI ve AHCI indekslerinde taranan dergilerde kripto para konulu yayınların son 4 yılda önceki dört yılın yaklaşık 13 katı bir sayıya ulaştığı ve kripto para konulu yayınlara yapılan atıfların sayısı son 4 yılda önceki 4 yıla göre yaklaşık 41 kat artış gösterdiğini ortaya koymaktadır.
A novel model of age estimation in mixed dentition population in Western India – A retrospective study
Authors: Karwa Harsha Rajendrakumar , Sardar Manisha Ahire , Chettiankandy Tabita Joy , Srivastava Surabhi , Adhane Yogita , Tadvi Salma
Published: December 2024

Objectives:

Age estimation is an integral part of legal investigations for forensic purposes. When the chronological age of the individual is not documented or he/she is under the conflict of the law, age estimation comes into play. The need for age estimation may arise in various legal incidences involving children, and juveniles, for civil aspects such as adoption, child labor, or other criminal proceedings such as rape, kidnapping, and illegal immigration. An accurate and dependable method, that can estimate age with high probability, can aid in narrowing down the list of possible victims or even play a decisive role in such cases. The reliability of the method and the probability of correct age estimation play a decisive role in the court of law. Bedek et al’s model (2019) was recently developed and tested in Croatian and South Indian populations with satisfactory results. As there is no evidence of study in the Western Indian population, looking into the accessibility of the population group, the present study aims to evaluate the validity and reliability of the Bedek method in the Western Indian population.

Materials and Methods:

Approval was sought from the Institutional Ethical Committee. Five hundred and twenty-five orthopantomographs (OPG) of patients aged 5–15 were obtained. A double-blinded study was done, where the radiographs were analyzed using ImageJ software, independently by two investigators. The data were tabulated and subjected to statistical analysis for accuracy of age estimation and intra- as well as inter-observer reliability.

Results:

There was an underestimation by a range of −1.3038 to −0.74536. There was underestimation in all the models of Bedek with P < 0.005, for all the teeth models except, the three- and two-teeth model (P > 0.005).

Conclusion:

In our study, we found that the accuracy of age estimation increases significantly with the number of teeth used. Seven four-teeth models were the most suitable for age estimation on OPG. All models except the three-teeth model and two-teeth model were found to be more accurate.
Применение автоматизированного сбора информации из сообществ социальных сетей для выявления активных пользователей
Authors: Низомутдинов Б.А. , Видясова Л.А.
Published: December 2024

В статье представлен разрабатываемый авторами метод определения наиболее активных подписчиков сообществ в социальных сетях. Объектом изучения выступили 18 официальных групп районных администраций Санкт-Петербурга ВКонтакте. В работе описывается реализация алгоритма сбора и анализа данных. В ходе исследования было определено общее количество комментариев в каждом сообществе и выделены наиболее активные подписчики, оставляющие больше всего комментариев под постами. С применением автоматизированного инструментария парсинга данных социальных сетей проведен анализ социальнодемографических характеристик активных пользователей. Все собранные данные были деперсонализированы. Результаты исследования показали существование в каждом сообществе ядра активных пользователей, которые оставляют больше всего реакций на посты, публикуемые в группах. Сделан вывод о большом потенциале, который можно извлечь из применения автоматизированного сбора данных из социальных сетей.

The article presents a method developed by the authors to determine the most active subscribers of communities in social networks. The object of study was 18 official groups of district administrations of St. Petersburg VKontakte. The paper describes the implementation of an algorithm for data collection and analysis. The study determined the total number of comments in each community and identified the most active subscribers who leave the most comments under posts. The analysis of socio-demographic characteristics of active users was carried out using automated tools for parsing social network data. All collected data has been depersonalized. The results of the study showed the existence in each community of a core of active users who leave the most reactions to posts published in groups. The conclusion is made about the great potential that can be extracted from the use of automated data collection from social networks
Сетевые СМИ в современном Таджикистане: социально-экономический анализ
Authors: Салимов Д.М.
Published: December 2024

В статье рассматривается положение сетевых СМИ как новый вызов для Таджикистана. При этом главный акцент делается на формирование сетевого общества и его влияние на трансформацию общественно-политической жизни страны в целом. На этой основе определяются основные тенденции развития сетевых СМИ и сформированная по отношению к ним медийная стратегия, создающая соответствующее коммуникацион-ное пространство, ориентированное на сохранение информационной безопасности. Выявляются социальные и экономические основы стратегии контроля над сетевыми СМИ. Результаты и выводы предлагаемого исследования опираются на оригинальные источники, эмпирические данные и сравнительные исследования Таджикистана в контексте стран среднеазиатского региона. Данный аспект включает в себя исследование социологических и журналистских расследований, как региональных, так и международных организаций. Эмпирической базой исследования также являются материалы сетевых СМИ и содержания законов, определяющие интернет-контент в стране.

The article examines the situation of online media as a new challenge to the ideology of the Tajik state. At the same time, the main emphasis is on the formation of a network society and its impact on the transformation of the political life of the country as a whole. The social and economic foundations of the strategy of control over online media are revealed. On this basis, the main trends in the development of online media and the media strategy formed in relation to them are determined, creating an appropriate communication space focused on preserving information security. The results and conclusions of the proposed study are based on original sources, empirical data and comparative studies of Tajikistan in the context of the countries of the Central Asian region. This aspect also includes the study of sociological and journalistic investigations, both regional and international organizations. The empirical basis of the study is also the materials of online media and the content of laws that define Internet content in the country. The conceptual basis of the study is that the emergence of online media in modern Tajikistan has contributed to the establishment of a less regulated information network space in the country, but the political regime of censorship and control over the media seeks to make this system integrative and sends all opposition views to the periphery.
Обработка научно-технической информации в междисциплинарных исследованиях методами математико-лингвистического направленного поиска на примере области изучения биоматериалов для тканевой инженерии
Authors: Антонов Е.В. , Артамонов А.А. , Орлов А.В. , Николаев В.С. , Захаров В.П. , Хохлова М.В. , Концевая Ю.С. , Бонарцев А.П. , Воинова В.В.
Published: December 2024

Разработка новых эффективных методов обработки научно-технической информации в междисциплинарных исследованиях с применением математико-лингвистического направленного поиска является актуальной проблемой в таких научных направлениях как изучение биоматериалов для тканевой инженерии из-за необходимости обрабатывать большие объемы информации, разнообразия источников информации и терминологической путаницы. Авторами проведено исследование по анализу входящего потока публикаций на предмет соответствия их тематическому направлению пользователя. В качестве исходного массива взята персональная база данных, собранная за 20 лет профессиональной деятельности научной группой «Медицинские биополимеры», размер которой составляет 3650 статей, который сравнивался с данными, собранными автоматизированным способом с 3-х высокорейтинговых изданий – Acta Biomaterialia, Biomaterials, Materials Today Bio. Для определения схожести текстов использовалась программная библиотека difflib, основанная на алгоритме Ратклифа–Мезнера. По итогам исследования выявлено, что разработанный подход смог адекватно выявить публикации соответствующие интересам лидера научной группы «Медицинские биополимеры», но также был выявлен ряд проблем, которые планируется решить на следующих этапах исследования.

The development of new effective methods for processing scientific technical information in interdisciplinary research using mathematical-linguistic targeted search is an urgent problem in such scientific field as the biomaterials for tissue engineering, because of the need to process large information volume, the diversity of information sources and terminological confusion. The authors have conducted a study to analyze the incoming flow of research papers for their relevance to the user's subject area. A personal database of 3,650 articles collected over 20 years of professional activity by the “Medical Biopolymers” scientific group was taken as an initial dataset. It was compared with the data collected by automated method from 3 highly ranked journals - Acta Biomaterialia, Biomaterials, Materials Today Bio. The software library difflib, based on the Ratcliffe-Mezner algorithm, was used to determine the similarity of the texts. According to the results of the study it was found that the developed approach was able to adequately identify the publications corresponding to the interests of the leader of the scientific group "Medical Biopolymers", but it also revealed a number of challenges, which are planned to solve at the next stages of the study.
Telegram каналы глав субъектов Российской Федерации: тестирование исследовательского инструментария
Authors: Чугунов А.В. , Низомутдинов Б.А. , Будяк А.А.
Published: December 2024

В работе анализируются каналы глав регионов Российской Федерации. Исследование каналов было разделено на 4 этапа: отбор каналов, сбор статистической информации, выгрузка сообщений и обработка текстовой информации. Для сбора данных был использован инструмент TGStat. Вся полученная информация была сохранена в единую базу для сравнительного анализа. Фиксировались такие параметры, общее количество подписчиков, индекс цитирования, средний охват одной публикации, общее количество публикаций, доля читающих подписчиков. Дополнительно, были проанализированы даты создания каналов и установлено, что более половины исследуемых каналов было создано в марте 2022 года. Итоговая база выгруженных сообщений составила 98,5 тыс. постов. Была поставлена задача автоматически определить, какие темы упоминаются в текстах имеющегося набора данных. Для этого был применен алгоритм решения задач кластеризации текста. В результате кластерного анализа сообщений были выделены 13 тематических кластеров, описанных ключевыми словами. Таким образом, полученные данные позволяют оценить основные темы, которые освещаются в аккаунтах официальных лиц. Пилотное исследование проведено в рамках проекта РНФ, реализуемого в Центре технологий электронного правительства Института дизайна и урбанистики Университета ИТМО, ориентированного на изучение специфики электронного взаимодействия органов власти с гражданами на региональном уровне.

The paper analyzes the channels of the heads of regions of the Russian Federation. The research of channels was divided into 4 stages: selection of channels, collection of statistical information, unloading of messages and processing of text information. The TGStat tool was used to collect data. All the information received was stored in a single database for comparative analysis. The following parameters were recorded: the total number of subscribers, the citation index, the average coverage of one publication, the total number of publications, the share of reading subscribers. Additionally, the dates of channel creation were analyzed and it was found that more than half of the studied channels were created in March 2022. The total base of unloaded messages amounted to 98.5 thousand posts. The task was set to automatically determine which topics are mentioned in the texts of the existing dataset. For this, an algorithm for solving text clustering problems was applied. As a result of cluster analysis of messages, 13 thematic clusters were identified, described by keywords. Thus, the data obtained allow us to evaluate the main topics that are covered in the accounts of officials. The pilot study was carried out as part of the RSF project, implemented at the E-Governance Center of the Institute of Design and Urban Studies ITMO University, focused on studying the specifics of electronic interaction between authorities and citizens at the regional level.
Синтез нелинейного наблюдателя для оценивания динамических сбоев с применением спектральной H∞-оптимизации
Authors: Князькин Я.В.
Published: December 2024

В представленной работе рассматривается задача синтеза наблюдателей - фильтров для оценивания воздействия аддитивных динамических сбоев в системах с липщицевой нелинейной частью. За счет выбора параметров асимптотического наблюдателя-фильтра обеспечивается его невосприимчивость к внешнему возмущению, в том числе обладающему известными спектральными свойствами. В основе предложенного метода лежит специальный спектральный подход в частотной области, использующий параметризацию множества передаточных функций замкнутой системы, дробно-рациональную матричную интерполяция и условие асимптотической устойчивости нулевого положения равновесия динамики ошибки оценивания. Предложен новый метод аналитического синтеза адаптивного нелинейного наблюдателя для оценивания воздействия динамических сбоев, эффективность которого продемонстрирована на практическом примере – движении морского судна в горизонтальной плоскости с постоянной скоростью под действием морского волнения. Для проведения имитационного моделирования динамики судна используется среда MATLAB.

The presented paper is devoted to the problem of the fault estimation observers design in case of plants with the Lipschitz system nonlinearity. Insensitivity of the observer to external disturbances, including ones with the given spectral properties, is to be guaranteed by the choice of its parameters. The proposed method is based on the special spectral approach in frequency domain, using parametrization of the set of transfer functions of the closed-loop system, Nevanlinna-Pick rational function interpolation and the condition of asymptotic stability of the zero equilibrium position of the estimation error dynamics. A novel approach to analytical synthesis of the adaptive nonlinear fault estimation observer is proposed, and its effectiveness is demonstrated on the practical example – the marine ship horizontal motion with the constant longitudinal speed under the sea waves action. The MATLAB package is used for numerical simulation of the ship dynamics.
Определение максимального множества независимых простых путей между вершинами графа
Authors: Терентьева Ю.Ю.
Published: December 2024

В настоящей статье излагается алгоритм определения максимального количества независимых простых путей, а также самих путей, между заданными вершинами графа. Данная задача крайне важна в теории связи, решение ее необходимо для обеспечения устойчивости сети связи. В то же время эта задача не рассматривается отдельной задачей в теории графов. Актуальность решения ее обусловлена, во-первых, как уже отмечалось, необходимостью повышения устойчивости сети связи, и, во-вторых, тем фактом, что для реальных сильно разветвленных сетей связи использование традиционных алгоритмов для поиска независимых маршрутов, основанных на поиске кратчайших путей, становится неэффективным. Неэффективность объясняется тем, что при наличии, например, двух независимых маршрутов в крупномасштабных сетях связи традиционные алгоритмы поиска кратчайших путей могут обнаружить только один из-за того, что между имеющимися независимыми простыми путями существуют пути, через которые пройдет найденный стандартным алгоритмом (нахождения кратчайшего пути) путь, захватив при этом части двух имеющихся независимых маршрутов. Аналогичный эффект может быть и при наличии более двух независимых простых путей, когда стандартные алгоритмы поиска кратчайшего пути могут "потерять" все простые пути сверх одного. Предмет настоящей статьи посвящен устранению данной проблемы.

This article presents an algorithm for determining the maximum number of independent simple paths, as well as the paths themselves, between the given vertices of the graph. This task is extremely important in the theory of communication, its solution is necessary to ensure the stability of the communication network. At the same time, this problem is not considered a separate problem in graph theory. The urgency of solving it is due, firstly, as already noted, the need to increase the stability of the communication network, and, secondly, the fact that for real highly branched communication networks, the use of traditional algorithms for finding independent routes based on finding the shortest paths becomes ineffective. The inefficiency is explained by the fact that in the presence, for example, of two independent routes in large-scale communication networks, traditional algorithms for finding the shortest paths can find only one due to the fact that between the available independent simple paths there are paths through which the found by the standard algorithm (finding the shortest path) path, capturing parts of two available independent routes. A similar effect can be observed in the presence of more than two independent simple paths, when standard algorithms for finding the shortest path can "lose" all simple paths in excess of one. The subject of this article is about fixing this problem.
Развитие гибкости мышления студентов при вычислении константы Фейгенбаума с помощью информационных и коммуникационных технологий
Authors: Секованов В.С. , Ивков В.А. , Пигузов А.А. , Рыбина Л.Б.
Published: December 2024

В предлагаемой статье рассматривается методика развития гибкости мышления студентов за счет объединения различных подходов к выполнению учебных математических заданий. Рассматривается задача вычисления константы Фейгенбаума с помощью символической динамики и с помощью метода Ньютона. Строятся математические модели вычислительного процесса. Приведены алгоритмы и их реализация на языке программирования. Показано, что при решении задачи различными методами, мы приходим к одному результату. Предполагается, что при решении поставленной задачи у студентов проявляется интерес как к математическим методам исследования, так и к их реализации с помощью средств программирования. Гибкость мышления формируется за счет объединения аналитических математических исследований и вычислительных алгоритмов, реализованных на компьютере. Предлагаемая методика проведения учебных занятий рассматривалась авторами ранее при реализации выполнения многоэтапных математико-информационных заданий. На каждом этапе решения поставленной задачи студент может почувствовать себя как в роли математика-исследователя, так и в роли математика-программиста, экспериментатора. Такая интеграция математических методов и информационно-коммуникационных технологий предоставляет возможность организовывать творческую математическую и творческую информационную деятельность студентов, нацеленную на формирование гибкости мышления и креативных качеств.

The proposed article examines the methodology for developing students' thinking flexibility by combining various approaches to the implementation of educational mathematical tasks. The problem of calculating the Feigenbaum constant using symbolic dynamics and using Newton's method is considered. Mathematical models of the computational process are being built. Algorithms and their implementation in the programming language are presented. It is shown that when solving the problem by different methods, we come to the same result. It is assumed that when solving the problem, students are interested in both mathematical research methods and their implementation using programming tools. Flexibility of thinking is formed by combining analytical mathematical research and computational algorithms implemented on a computer. The proposed methodology for conducting training sessions was considered by the authors earlier in the implementation of the implementation of multi-stage mathematical and informational tasks. At each stage of solving the problem, the student can feel himself both in the role of a mathematician-researcher, and in the role of a mathematician-programmer, experimenter. Such integration of mathematical methods and information and communication technologies provides an opportunity to organize creative mathematical and creative information activities of students, aimed at the formation of flexibility of thinking and creative qualities.
Новый этап международной стандартизации ИТ-образования
Authors: Сухомлин В.А. , Зубарева Е.В.
Published: December 2024

Статья посвящена анализу современного состояния процессов международной стандартизации, формирующих методические основы для решения задач подготовки профессиональных кадров по информационным технологиям (ИТ), исторически получивших в университетском окружении академическое название «компьютинг» (computing). Формирование таких методических основ системы ИТ-образования рассматривается в виде трех взаимосвязанных процессов стандартизации, а именно, стандартизации цифровых навыков/компетенций, индустриальных (профессиональных) сводов знаний (BoK), куррикулумов по направлениям подготовки ИТ-кадров. По каждому из указанных процессов стандартизации рассматриваются современные достижения, как, например, в области цифровых навыков – стандарты SFIA 8, в сфере профессиональных знаний – SEBoK и CyBoK, в части стандартов куррикулумов – CC2020, IS2020, DS2021, КБ2021. Выполненный в статье анализ процессов международной стандартизации, связанных со сферой ИТ-образования, которое следует рассматривать как важнейший сектор образовательной деятельности вообще, показывает стремительное (лавинообразное) развитие этой деятельности на принципах системности, целостности, интеграции.

The article is devoted to the analysis of the current state of the processes of international standardization of the methodological foundations of the system for training professional personnel in the field of information technology (IT) known as "computing" in the academic environment. The article considers three interrelated standardization processes, namely, the standardization of digital skills / competencies, the creation of generally significant industry (professional) bodies of knowledge (BoKs), as well as the standardization of curricula in the areas of IT training. The analysis of international standardization processes that are directly related to the IT education system, which should be considered as the most important sector of educational activity, is carried out. This analysis showed the high rates of development of these processes on the principles of consistency, integrity, and integration.
Создание профиля "Кибербезопасность и искусственный интеллект" для направления подготовки ФИИТ на основе куррикулумного подхода
Authors: Сухомлин В.А.
Published: December 2024

Статья посвящена описанию основных характеристик профиля «Кибербезопасность и искусственный интеллект» для направления подготовки 02.03.02 Фундаментальная информатика и информационные технологии (ФИИТ). Рассмотрены концепция и история создания базового направления ФИИТ, его назначение как многопрофильного стандарта, предназначенного для подготовки высококвалифицированных ИТ-профессионалов по широкому спектру ИТ-направлений. Отмечается, что ФИИТ отвечает современным тенденциям развития области ИТ и ИТ-образования, в частности, духу документов Computing Curricula 2005 и Computing Curricula 2020. Рассмотрены основные принципы разработки и архитектура свода знаний куррикулума дисциплины «Кибербезопасность», на основе которого разработан профиль «Кибербезопасность и искусственный интеллект». Приведено описание общих характеристик данного профиля, включая: цели, миссию, профессиональные компетенции как ожидаемые результаты обучения. Архитектурный подход к проектированию свода знаний куррикулума кибербезопасности позволил системным образом выявить набор знаниевых доменов, определяющих содержание программ подготовки бакалавров кибербезопасности.

The article describes the main characteristics of the profile "Cybersecurity and artificial intelligence" for the direction of training 02.03.02 Fundamental Informatics and Information Technology (FIIT). The concept and history of the creation of the basic direction of FIIT, its purpose as a multidisciplinary standard designed to train highly qualified IT professionals in a wide range of IT areas are considered. It is noted that FIIT meets modern trends in the development of IT and IT education, in particular, the spirit of the documents Computing Curricula 2005 and Computing Curricula 2020. The main principles of development and architecture of the code of knowledge of the curriculum of the discipline "Cybersecurity" are considered, on the basis of which the profile "Cybersecurity and Artificial Intelligence" is developed. A description of the general characteristics of this profile is given, including: goals, mission, professional competencies as expected learning outcomes.
Устойчивость различных стационарных точек при малых колебаниях аэродинамического маятника в потоке квазистатической среды
Authors: Беляков Д.В.
Published: December 2024

В статье построена и исследована математическая модели малых колебаний аэродинамического маятника в потоке движущейся среды. В качестве модели воздействия среды на тело принята модель квазистатического обтекания пластинки средой. Согласно этой гипотезе, аэродинамические силы, действующие на тело, прикладываются в центре давления. В нашей задаче центр давления является подвижным относительно пластинки. Получены уравнения движения для рассматриваемого тела. Проведен переход к новым безразмерным переменным. Показано нарушение единственности при определении угла атаки. Проведен параметрический анализ областей неоднозначности. Найдены все стационарные точки, являющиеся решениями уравнений равновесия. Показано, что в наиболее характерном положении равновесия, соответствующем состоянию покоя областей неоднозначности нет. Проведено исследование устойчивости различных нетривиальных положения равновесия, в которых реализован критерий Гурвица и изображены области устойчивости. Показано, что силы аэродинамического воздействия для тел с одними формами могут способствовать развитию автоколебаний, а для других затуханию. В математическом пакете MATLAB 18 написан комплекс программ, позволяющий находить стационарные точки, строить области устойчивости для каждой из них и проводить численное интегрирование уравнений, описывающих колебания тела, для того, чтобы подтвердить адекватность построенной математической модели.

In the article, a mathematical model of small oscillations of an aerodynamic pendulum in the flow of a moving medium is constructed and investigated. As a model of the effect of the medium on the body, the model of quasi-static flow around the plate by the medium is adopted. According to this hypothesis, the aerodynamic forces acting on the body are applied at the center of pressure. In our problem, the pressure center is movable relative to the plate. The equations of motion for the body under consideration are obtained. The transition to new dimensionless variables has been carried out. The violation of uniqueness in determining the angle of attack is shown. The parametric analysis of the ambiguity areas is carried out. All stationary points that are solutions of the equilibrium equations are found. It is shown that there is no ambiguity in the most characteristic equilibrium position corresponding to the state of rest. A study of the stability of various non-trivial equilibrium positions in which the Hurwitz criterion is implemented, and the stability regions are depicted is carried out. It is shown that the forces of aerodynamic action for bodies with some shapes can contribute to the development of self-oscillations, and for others to attenuation. The mathematical package MATLAB 18 contains a set of programs that allows you to find stationary points, build stability regions for each of them and perform numerical integration of equations describing body vibrations in order to confirm the adequacy of the constructed mathematical model.