bluuebunny/crossref_metadata_2025 huggingface dataset:
Process semantics of complex numbers
Authors: Surov I.A.
Published: October 2024

Perspective approaches to imitation of natural thinking build on waveand quantumlike models, overcoming the limitations of Boolean logic and classical probability calculus. Further development of these methods requires an explanation of the reasons for these advantages. This paper shows that such a reason is the affinity of fundamental principles of natural cognition to the algebra of complex numbers. The vector structure of these numbers, in particular, matches the universal cognitive model of processes in nature. First, different phases of the complex number correspond to the phases "novelty", "goal", "action", and "result" of the life cycle of the considered activity. Real and imaginary axes of the complex plane then describe the factual and potential dimensions of the process's result. Simplicity and universality allow this model to avoid the major difficulties of modern approaches to predictive coding of cognitive information. These features open ways to algorithmic imitation of process thinking and the development of naturelike computational systems.
Model of speaker gender recognition based on audio data
Authors: Mukhamatkhanova A.T. , Oparina T.M.
Published: October 2024

In this article considered the task of recognizing the speaker's gender based on audio data using the KNN method. The authors propose an algorithm for extracting features from spectrogram of audio recordings based on calculating the centroid, bandwidth, and decay of high frequencies. The extracted features are then used as input data for the KNN method. The results show that the proposed method allows achieving high accuracy in recognizing the gender of the speaker.
O Projeto político-pedagógico como um instrumento fortalecedor da Gestão Democrática
Authors: Preve Costa Janaina , Wagner Flávia
Published: October 2024

Este trabalho tem por objetivo investigar o papel que o Projeto político-pedagógico exerce nos espaços educacionais para auxiliar na efetivação da Gestão Democrática. Para tanto, foram realizadas consultas de produções científicas (teses e dissertações) sobre o referido tema nas bases de dados da Biblioteca Digital Brasileira de Teses e Dissertações e Catálogo de Teses e Dissertações da Capes. As buscas partiram do pressuposto de que o Projeto políticopedagógico é um dos instrumentos para o fortalecimento e a efetivação de uma Gestão Democrática e participativa nas escolas. Utilizamos como metodologia a revisão sistemática com análise qualitativa e partimos de critérios predefinidos para a inclusão e exclusão dos documentos para estudos. A amostra pesquisada compreende o período de 2015 a 2023. Foram selecionados oito trabalhos, sendo seis dissertações e duas teses. A partir do levantamento emergiram resultados relativos à importância da Gestão Democrática nos espaços educacionais, a (re)afirmação do Projeto político-pedagógico como um dos instrumentos para efetivação da democracia, bem como, documento norteador das projeções e ações no âmbito das escolas. Em contrapartida, surgiram questões relacionadas a elaboração do documento de forma antidemocrática, apenas para confirmar decisões tomadas individualmente e como mera formalização burocrática.
O Transtorno do Processamento Auditivo
Authors: Cacia Fachin Scramim Rita , Graff Patrícia
Published: October 2024

O Transtorno do Processamento Auditivo constitui uma alteração do sistema nervoso central que dificulta a compreensão das informações, interferindo na aprendizagem das crianças. A presente pesquisa buscou compreender os conhecimentos constituídos pelos professores do Ensino Fundamental sobre essa condição de existência e os modos como operam junto aos escolares que o apresentam. A pesquisa parte de uma revisão bibliográfica e de pesquisa de campo junto a professores da rede estadual de educação de um município do oeste de Santa Catarina. Os resultados mostram que tanto os professores como as redes de ensino desconhecem o Transtorno do Processamento Auditivo e, por consequência, as estratégias pedagógicas que podem beneficiar os estudantes com essa condição. As conclusões permitem afirmar que abordar essa temática com os profissionais da educação é fundamental para a inclusão de estudantes com essa condição, pois a falta de conhecimento sobre o tema dificulta a identificação e pode produzir lacunas nos processos de aprendizagem desses estudantes.
Design and teaching application of a virtual simulation training system for bridge engineering drawing recognition based on Unity3D
Authors: Jia Xiaodong
Published: October 2024

In response to the common issues in practical training in vocational engineering construction courses, such as dangerous operation of training equipment, insufficient number of training equipment, and ineffective teaching, a vivid and interactive virtual simulation training system was developed using Unity3D software, taking the U-shaped bridge abutment in the course of Bridge Engineering as an example. Detailed introduction to the development and design process of 3D model establishment, ZSpace device adaptation, file format conversion, model rendering and disassembly, model zooming in and out, script writing and function implementation, UI interface design, etc., in order to achieve immersive interaction functions such as free observation, assembly disassembly, and ZSpace integrated VR virtual experience in the virtual simulation training system. The practical results show that the interactive effect simulated through the simulation training system is superior to that of the physical system, which can enhance the sense of experience, improve learning enthusiasm, and deepen the understanding of the knowledge points in Bridge Engineering Drawing Recognition. After the system is successfully established and applied in the training and teaching process, it will provide an important reference for the training and teaching of relevant courses for students majoring in road and bridge engineering, and also enhance the cultivation of high-quality skilled personnel in engineering majors in vocational colleges.
Characteristics of sandstone unloading creep and modelling for safe tunnel construction under high perimeter pressure and high pore water pressure condition
Authors: Song Li , Tang Fujun , Kong Dehui
Published: October 2024

Research on the properties of sandstone in the tunnel environment has been conducted due to the building industry’s rapid development, which is gradually involving underground water. Sandstone used in tunnel construction is susceptible to high perimeter and water pressures as a result of the abundance of sand and gravel close to groundwater, which might result in mishaps resembling collapses. The modified Burgers Model for the Malm dataset is the foundation of this study, which aims to reduce the internal crack extension caused by sandstone’s unloading creep. First, the study increased the material’s Poisson’s ratio in accordance with the Mohr–Coulomb strength criterion and builds a triaxial loading model on its foundation. Next, it analyzed the extension of the fracture surface of sandstone while taking high peripheral pressure and high hydraulic pressure into account. Finally, it discretized the unloading creep of sandstone using the improved Burgers model. On the basis of the model put forward in the study, experimental validation was then done on the Malm dataset. The sandstone would reach the final rupture area without any protection measures in just 10 days, but the model suggested in the study can delay this time to 200 days, while the effects of the other three models would delay this time by 75, 60, and 41 days, respectively. The model’s breadth was indicated by the linear fit value of 0.9827 for 36 experiments. The experimental findings demonstrated that the model suggested in the study can successfully lower the rate of sandstone unloading creep and increase worker safety.
Seismic performance of an assembled monolithic concrete column
Authors: Li Shufeng , Li Hexiang , Zhao Di
Published: October 2024

A prefabricated concrete column-to-column structure connected by high-strength bolts is proposed. To explore the seismic performance and failure form of the structure, the finite element analysis software is used to simulate the low-cycle repeated load test. The hysteretic curve and skeleton curve of the structure are obtained, and the stiffness degradation law, ductility and energy dissipation capacity of the structure are quantitatively analyzed to evaluate the seismic performance of the structure. The results show that the ductility coefficient of the structure is basically between 2.19 and 4.97, and the ductility coefficient of most specimens is greater than 3.0, indicating that the structure has good ductility and deformation capacity. The equivalent viscous damping coefficients of the specimens are in the range of 0.21–0.29, indicating that the structure has good energy dissipation capacity. In a certain range, increasing the thickness of the end plate has no significant impact on the energy consumption capacity of the structure. The compressive strength of the concrete in the core area is greatly improved under the constraint of the end plate bolts, and end plate bolt connection can well realize the transmission of force and give full play to the performance of materials.
The building application of foam concrete combined with PCM in cold regions and its energy efficiency
Authors: Wang Huifang
Published: October 2024

Building performance in cold regions greatly affects the quality of people living in the building. With the further development of the construction industry, how to improve the energy efficiency of buildings in cold regions has become one of the key issues. The study introduces paraffin phase change capsules as aggregate components on the basis of foam concrete, and then designs a matching energy efficiency analysis method to regulate the concrete parameters, and finally tests the performance of the research method and conducts an application analysis. The experimental results show that in performance simulation testing, the internal surface temperature decreases to 288.2 K at the minimum when the external temperature is 0°C to 4°C. It shows that the research method can effectively analyze the building performance, and the analysis method can optimize the performance of the foam concrete materials proposed in the research, and obtain building materials with better thermal insulation performance than the existing conventional materials. Research can provide certain technical references for building energy conservation in cold regions.
Influence of weak acid salts and curing condition on supersulfated cement mortar
Authors: Khanh Son Nguyen , Tri Huynh Nguyen Ngoc , Imjai Thanongsak , Al Bakri Abdullah Mohd Mustafa , Błoch Katarzyna
Published: October 2024

This study explores the impact of weak acid salt agents (citrate and tartrate) in the mixture and various curing conditions on the properties of supersulfated cement (SSC) mortar. Compressive strength tests were conducted on prism-shaped samples measuring 4 × 4 × 16 cm. A comprehensive analysis of the phase assemblage of hardened products was carried out using X-ray diffraction (XRD), differential scanning calorimetry (DSC), and scanning electron microscopy (SEM) coupled with energy-dispersive X-ray spectroscopy (EDS). The results reveal the abundant formation of ettringite (E) and hydrotalcite (Ht) when weak acid salt agents are added, especially in chloride and sulfate-rich curing solutions, leading to a notable increase in compressive strength, up to 200% compared to the control sample. Furthermore, the study demonstrates a substantial improvement in early and overall strength under temperature-stimulated curing conditions, accelerating the hydration reaction of SSC. These findings provide deeper insights into the factors influencing SSC hardening and strength development, offering valuable information for enhancing the efficiency and utilization of SSC in the construction industry, aligning with the goals of sustainable development.
Propuesta para delimitar el concepto de “contenido dañino en línea” a partir de la experiencia del Reino Unido
Authors: Tisné Niemann Jorge
Published: October 2024

El uso masificado de internet ha provocado que los usuarios estén expuestos a una gran cantidad de conductas ofensivas por parte de terceros, lo que suele incidir en la vulneración de los derechos y libertades de las personas. Con el objeto de promover un espacio seguro, distintas iniciativas legislativas comparadas han comenzado a regular los daños en línea, exigiendo a las plataformas ciertos deberes de moderación de dicho contenido. Sin embargo, el concepto de daño en línea es subjetivo, especialmente si se considera que incluye aquel contenido que sin ser ilegal, es considerado nocivo o perjudicial. A propósito de lo anterior, este trabajo tiene por objeto estudiar las distintas conductas que pueden subsumirse en el concepto de daño legal pero perjudicial a la luz de la taxonomía de daños ofrecida en el Libro Blanco de Daños en Línea del Reino Unido, para luego proponer una definición de daño en línea que sirva de base para una regulación orgánica y coherente de las conductas que deben ser atenidas y controlados en entornos digitales.
The Transformative Role of Digital Tools in Comic Book Preservation
Authors: Popov Vladimir
Published: October 2024

Traditionally viewed as static repositories, archives are now seen as dynamic entities capable of continuous reconfiguration and reinterpretation. This study examines how digital practices in comic book archiving maintain historical and emotional integrity, while making these artefacts relevant to contemporary audiences. This paper explores the theories of Wolfgang Ernst, Michel Foucault, Lev Manovich, and others in order to explain digital archiving as a dynamic and interpretive act that shapes historical narratives and cultural memory. Digital restoration of comic books focuses on preserving the original aesthetic and historical context, while recoloring revitalizes visual elements to enhance appeal. Reimagining involves comprehensive reinterpretation and aligns with new media theories in order to offer fresh perspectives on historical narratives. The discussion shows how these practices democratize access to cultural heritage, transforming archives into active sites of cultural engagement and potentiality. By balancing technical precision and interpretive insight, digital artists and archivists aim at ensuring that comic books remain vibrant and meaningful cultural treasures for future generations.
ANALISIS KEBUTUHAN E-MODUL MULTIMODAL BERKEARIFAN LOKAL MADURA UNTUK MENULIS TEKS CERPEN
Authors: Farahiba Ayyu Subhi , Puspitasari Mega
Published: October 2024

Multimodal e-modules develop students' abilities in understanding a variety of multimodal texts which encourage intellectual quality and broader learning experiences. Multimodal-based learning can be integrated with local wisdom as an effort to preserve cultural values. The aim of the research is to determine the need for a multimodal e-module based on Madurese local wisdom for writing short story texts. This research is aqualitative descriptive research oriented towards the development of a product. The data collection technique was carried out through a questionnaire distributed to Indonesian language teachers and also to students at two high schools in Pamekasan Regency via Google Forms. Data were analyzed using descriptive analysis and the percentage of the total number of answers given was divided by the total number of respondents multiplied by 100%. The results of this research show that learning to write short story texts has never been carried out using e-modules, the use of multimodal teaching materials has never been done, and the short story texts presented in learning have not been based on local Madurese wisdom. Based on these results, it can be concluded that the development of a multimodal e-module based on local Madurese wisdom is really needed by students so it needs to be developed to support the short story writing skills of class XI high school students.
ANALISIS KONTEN HOTS DALAM BUKU SIMPAY BASA SUNDA KELAS VIII
Authors: Mauludi Nugraha , Nurjanah Nunuy , Isnendes Retty
Published: October 2024

The goal of 21st century learning is that students are expected to have higher order thinking skills. But in fact, students' high-level thinking skills in Indonesia are still worrying. Based on that, this study aims to understand aspects of higher order thinking and describe its application in the content contained in textbooks in schools. In analyzing and describing content that has high-level thinking content, (1) cognitive level, (2) stimulus elements, and (3) contextual elements will be analyzed. This research method uses descriptive analytic method with a qualitative approach. The techniques used in this research are documents and notes. The text book used in this study is the Simpay Basa Sunda book at the VIII grade junior high school level. The results of this study contained 413 data whose details were (1) various cognitive levels in the book there were 72.39% at level 1 (knowledge and understanding), 9.68% at level 2 (application), and 17.91% at level 3 (reasoning). (2) the stimulus elements in this book are dominated by verbal stimuli totaling 323 stimuli, then visual stimuli totaling 1 stimulus. (3) there are 114 contextual elements in this book with a percentage of 28%. It can be concluded that this book can support the development of higher-order thinking skills, and can also support the ongoing 21st century learning process. However, it must be noted that this can be developed further by increasing the content containing HOTS.
KAJIAN SEMIOTIKA PIERCE PADA FOLKLOR BATU KUDA
Authors: Firmansyah Arif , Mutmainnah Rizqi Nur Hanifah , Ramadhan Ardhia Khrsna
Published: October 2024

This study aims to obtain and describe the moral value of the oral tradition of Horse Stone folklore based on Pierce's semiotics in classifying objects based on the classification of symbols, icons, and indices. Pierce's use of semiotics is related to the uses possessed by folklore itself. All types of folklore, whether oral folklore, partly oral folklore or non-oral folklore, have uses or functions that are very important for human life.  This makes folklore in life can describe the way a person involves himself in the midst of community life. The method used qualitative method with a semiotic approach, because the results of data that have been generated and collected on the Horse Stone folklore will be described in the form of written data. Finally, the results of data processing are used as a proposal for literature teaching materials in high school based on the Independent Curriculum in the form of modules. Learning folklore or folklore has a very important role in efforts to preserve noble values and local cultural wisdom. In education, folklore can be used as a learning medium and can be used as learning material for students. The use of folklore as an educational medium can be utilized in various disciplines, which of course the selection of folklore used must be right with the subject matter to be delivered. The use of folklore as an educational medium also acts as one step in preserving existing local culture. Therefore, getting used to delivering lessons through teaching materials is an effort to preserve folklore as part of culture, both protection, utilization and development of folklore in the future.
First sighting of a pair of Ryukyu robin Larvivora komadori Temminck, 1835 (Aves, Passeriformes) during breeding season on Jeju Island, Republic of Korea: a nesting attempt?
Authors:   Federal Scientific Center of the East Asia Terrestrial Biodiversity, Far East Branch of the Russian Academy of Sciences, Vladivostok, 690022, Russia, Nazarenko Alexander A. , Pavlenko Marina V. ,   Federal Scientific Center of the East Asia Terrestrial Biodiversity, Far Eastern Branch of the Russian Academy of Sciences, Vladivostok 690022, Russia, Gamova Tatiana V. ,   Federal Scientific Center of the East Asia Terrestrial Biodiversity, Far East Branch of the Russian Academy of Sciences, Vladivostok, 690022, Russia
Published: October 2024

The Ryukyu robin (Larvivora komadori Temminck, 1835) is an endemic inhabitant of the Ryukyu Archipelago, Japan. In 2018, we made several birding excursions to Jeju Island, Republic of Korea. Within the 1100 Altitude Wetland protected area on May 28 and May 30 we encountered a pair of birds, which, according to reference literature and bird guides we identifi ed as Larvivora komadori. That was the fi rst visual sighting of the Ryukyu robin during the breeding season on Jeju Island, which is separated from the nearest breeding site by more than 200 kilometers of open sea. This fact can be regarded as a potential ability for this endemic island species to spread to new islands. Possible pathways for natural introduction of the Ryukyu
COMPUTER MODELING DEVELOPMENT OF DEVELOPMENT OF BUILDINGS SETTLEMENT BASED ON VERTICAL REINFORCEMENT
Authors: БОГДАНОВА Е.О. , КЛЕВЕКО В.И.
Published: October 2024

При возведении зданий на фундаментной плите, основанием которой служат слабые водонасыщенные грунты, могут возникать сверхнормативные осадки, которые становятся причиной деформаций несущих конструкций здания. В статье представлен прогноз поведения здания на неоднородном основании. Моделирование осуществлялось в программном комплексе Plaxis. В ходе исследования получены результаты последовательностей укрепления основания и произведено сравнение с данными геотехнического мониторинга. ©Богданова Е. О., Клевеко В. И., 2017

There are excessive settlements of the building as a result of the erection of buildings on the foundation plate which located on weak water-saturated grounds. It became the cause of deformations of the bearing structures of the building. The article presents the forecast of building behavior on an inhomogeneous building base. Modeling were made in the software complex Plaxis. In the course of the study, the results of base strengthening sequences were obtained and compared with geotechnical monitoring data.
GAS-DYNAMIC FLOWS IN AN EJECTOR PNEUMATIC FIBER FORMING DEVICE
Authors: Потекаев А.И. , Звегинцев В.И. , Лысак И.А. , Лысак Г.В.
Published: October 2024

Установлены границы области предпочтительных значений ключевых физических характеристик работы волокнообразующего устройства, таких как перепад давлений в сопле и площадь его критического сечения для обеспечения процесса распыления расплавов полимеров на основе исследования характеристик его газовых течений методами физического и математического моделирования.

The work is devoted to the establishment of preferred values range boundaries of the fiber-forming device key physical characteristics, such as the pressure drop in the nozzle and the area of its critical section, to ensure the process of polymer melts spraying based on the study of the characteristics of its gas flows by physical and mathematical modeling. Index terms: polymer fibrous materials, spraying, gas dynamics
SYNTHESIS, IDENTIFICATION AND BIOLOGICAL ACTIVITY EVALUATION OF NOVEL TERPENOID DERIVATIVES BEARING NITROTRIAZOLE HETEROCYCLES
Authors: Суханов Г.Т. , Крупнова И.А. , Босов К.К. , Филиппова Ю.В. , Суханова А.Г. , Пивоварова Е.В.
Published: October 2024

Показано, что 3-нитро-1,2,4-триазол и 3-нитро-1,2,4-триазол-5-он вступают в реакцию алкилирования с представителем третичного терпенового спирта – линалоолом с образованием соответствующих продуктов взаимодействия. В среде концентрированной серной кислоты реакция сопровождается изомеризационными и структурными превращениями линалоола с образованием спиртов, как первичной, так и третичной природы, последние из которых вовлекаются в целевую реакцию алкилирования. С помощью веб-ресурса PASS Online осуществлен компьютерный скрининг, показано, что синтезированные терпеновые производные, содержащие 3-нитро-1,2,4-триазоловые и 3-нитро-1,2,4-триазол-5-оновый гетероциклы преимущественно обладают хемосенсибилизирующим действием.

3-Nitro-1,2,4-reiazole and 3-nitro-1,2,4-triazole-5-one were shown to engage in an alkylation reaction with a tertiary terpene alcohol, linalool, to furnish the corresponding reaction products. The reaction in concentrated sulfuric acid came amid isomerization and structural transformations of linalool to deliver alcohols of both primary and tertiary nature, with the latter being involved in the target alkylation reaction. The PASS Online web-resource was used for the computer screening and demonstrated that the resultant terpene derivatives bearing 3-nitro-1,2,4-triazole and 3-nitro-1,2,4-triazol-5-one heterocycles exhibit chiefly a chemosensibilizing effect.
METHOD FOR CONTROL OF STRESS-DEFORMED STATE OF CARRYING ELEMENTS OF PANTOGRAPH-TYPE LIFTS
Authors: Калиниченко В.С. , Власов Ю.А.
Published: October 2024

A method of fail-safe non-destructive testing of the stress-strain state of load-carrying elements of hoisting-and-transport machines is presented, which is considered on the example of a prototype of a pantograph-type hoist. The analysis of the basic requirements for the load-bearing elements of hoisting-and-transport machines is carried out. A technique for experimental research has been developed, including strain gauge and thermal methods of non-destructive testing. Shown is a full-scale experiment of a prototype of a pantograph-type elevator.
THE INFLUENCE OF CULTURAL MEDIUMS COMPOSITION ON WHITE PHOSPHORUS MICROBIAL METABOLISM
Authors: Миндубаев А.З. , Бабынин Э.В. , Бадеева Е.К. , Минзанова С.Т. , Миронова Л.Г.
Published: October 2024

В представленном исследовании сравнивался рост аспергилла АМ1 в культуральных средах, различающихся по составу, но в качестве источника фосфора содержащих белый фосфор. Сравнивая составы сред и скорость роста в них аспергилла, мы нашли ключевой компонент, который является благоприятным фактором для роста АМ1 и биодеградации белого фосфора. Этим компонентом оказался нитрат натрия NaNO3. Также, показано, что сульфат меди CuSO4 не оказывает никакого влияния на рост аспергиллов в средах с белым фосфором, независимо от состава этих сред.

The presented study compared the growth of Aspergillus niger strain AM1 in culture media varying in composition but containing P4 as the sole source of phosphorus. Comparing the compositions of the media and the growth rate of Aspergillus in them, we found a key component that is a favorable factor for the growth of AM1 and the biodegradation of white phosphorus. This component was sodium nitrate (NaNO3). It has also been shown that copper sulphate (CuSO4) has no effect on the growth of Aspergillus in media with white phosphorus, regardless of the composition of these media.
ANALYZER OF IMPEDANCE CHARACTERISTICS OF ULTRASONIC VIBRATIONAL SYSTEMS
Authors: Хмелев В.Н. , Барсуков Р.В. , Ильченко Е.В. , Генне Д.В. , Абраменко Д.С. , Подкользин А.Д.
Published: October 2024

В статье приведены данные научных исследований, по разработке усовершенствованного УЗ прибора,  связанных с изучением влияния акустической нагрузки на параметры и характеристики ультразвуковых колебательных систем. Отличительной особенностью представленного УЗКС, является повышение  эффективности работы ультразвуковых излучателей, а так же снижение их себестоимости. Преимуществом разработанного анализатора заключается в контроле импеданса и возможности своевременного выявления критических изменений.

The article presents the data of scientific research on the development of an advanced ultrasound device related to the study of the effect of acoustic loading on the parameters and characteristics of ultrasonic oscillatory systems. A distinctive feature of the UOS is the increase in the efficiency of ultrasonic radiators, as well as a reduction in their cost. The advantage of the developed analyzer is the control of impedance and the possibility of timely detection of critical changes.
Theoretical and experimental studies of rotational molding of polymer liner
Authors: Блазнов А.Н. , Хабазин И.С.
Published: October 2024

Актуальность заключается в перспективах разработки и использования сверхлегких композитных баллонов на полимерном лейнере вместо металлических и металлокомпозитных баллонов давления на металлическом лейнере. Целью работы является теоретическое и экспериментальное исследование процесса ротационного формования полимерного лейнера для композитного баллона давления. Рассмотрено математическое описание ротационного формования пластмасс, которое позволяет найти оптимальную скорость вращения главной и центральной оси. Приведены рекомендации из литературы по соотношению скоростей вращения для изделий различных форм. Разработана установка ротационного формования и проведены экспериментальные исследования режимов нагрева и выдержки и соотношения частот вращения на характеристики получаемых изделий. Экспериментально установлены режимы ротационного формования (выдержка 30 минут при температуре 200-205 ºС) для мелкодисперсного полиэтилена марки Lotte UR-644 (LLDPE). Наилучшее значение равнотолщинности изделий (с отклонением по толщине 1,5 мм) получено при отношении частот вращения главной и вторичной оси 2:1.

The relevance of this study is that RD and application of ultralight composite cylinders based on polymer liners in place of metal and metal-composite pressure cylinders based on metal liners hold much promise. This study sought to theoretically and experimentally investigate the rotational molding process for polymer liner to be used in composite pressure cylinders. A mathematical description of the rotational molding of plastics  was considered and allows the optimum rotational speed of principal and central axes to be identified. Literature recommendations on rotational speeds for items of different shape are given. A rotational molding device was designed and experiments were done to examine how the heating, residence and rotational speed regimes influence the resultant items’ characteristics. Rotational molding regimes (30 min residence time at 200-205 ºС) were experimentally found for Lotte UR-644 (LLDPE) fine polyethylene. The best equithickness value for items (with a 1.5 mm thickness deviation) was obtained at a rational speed ratio of the principal and central axes of 2:1.
MACROKINETICS FOR REACTION OF ALUMINUM POWDERS IN WATER
Authors: Морозова О.Н. , Кудряшова О.Б. , Антонникова А.А. , Павленко А.А. , Титов С.С.
Published: October 2024

В работе исследуется макрокинетика реакции с водой порошков алюминия разной дисперсности. Анализируются результаты эксперимента, в котором водные суспензии порошков алюминия нагревали до 60°С при постоянном перемешивании. В эксперименте измерялось давление водорода и температура в реакторе. Обсуждаются эмпирические формулы, описывающие кинетику топохимических реакций в приложении к рассматриваемой задаче. Высказано предположение, что важнейшим параметром, определяющим скорость реакции и выход конечного продукта (водорода), является удельная поверхность частиц порошка. Рассмотрены вопросы безопасности проведения реакции нанопорошков алюминия в воде. Для этого используется критерий Франк-Каменецкого, определяющий условия теплового взрыва в системе. Показано, что увеличение массы и удельной поверхности алюминиевого порошка, температуры разогрева смеси могут создать условия теплового взрыва в реакторе. Решение проблемы поиска кинетических параметров реакции дисперсного алюминия с водой актуально в связи с разработкой источников водорода для топливных элементов. Найденные закономерности протекания реакции на практике могут быть использованы для расчета технических параметров систем генерации водорода.

The macrokinetics for the reaction of different dispersion aluminum powders with water is studied. The results of an experiment in which aqueous suspensions of aluminum powders were heated to 60°C with constant mixing are analyzed. In the experiment, the pressure of hydrogen and the temperature in the reactor were measured. Empirical formulas that describe the kinetics of topochemical reactions as applied to the problem under consideration are described. It has been suggested that the specific parameter of the powder particles is the most important parameter determining the reaction rate and yield of the final product (hydrogen). The safety issues of the reaction of aluminum nanopowders in water are considered. Frank-Kamenetsky criterion which determines the conditions of a thermal explosion in the system is used for this. It is shown that an increase in the mass and specific surface of aluminum powder and the temperature of heating the mixture can create conditions for thermal explosion in the reactor. The solution to the problem of finding the kinetic parameters of the reaction of dispersed aluminum with water is relevant in connection with the development of hydrogen sources for fuel cells. The found patterns of the reaction in practice can be used to calculate the technical parameters of hydrogen generation systems.
Mathematical modeling of drying process of basalt-fiber heat-insulating slabs
Authors: Фирсов В.В. , Кротов А.С. , Блазнов А.Н.
Published: October 2024

Проведены исследования процесса сушки базальтоволокнистых теплоизоляционных плит из супертонкого штапельного волокна, с измерением температуры внутри образца и изменением массы в процессе сушки. Предложен метод анализа параметров сушки волокнистых теплоизоляционных материалов с реверсивным изменением потока теплоносителя. Сущность метода заключается в математической обработке экспериментальных данных кинетических кривых изменения температуры. Создана математическая модель для описания процесса сушки волокнистых материалов на основе критериев подобия массо-теплопереноса, определены параметры модели. Показаны различия между кинетическими кривыми сушки однонаправленного процесса и реверсивного. Предложен метод разделения кинетики реверсивной сушки на подмножества с построением индивидуальных математических моделей. Адекватность моделей доказана с помощью критерия Фишера.

Here we examined the drying process of basalt fiber-reinforced heat-insulating slabs made of superfine staple fiber by measuring the temperature inside the specimen and the weight loss during the drying. An analytical method is suggested for the drying parameters of fibrous heat-insulating materials with reverse variation of the heat-carrier flux. The method relies on mathematical treatment of experimental data from kinetic curves of temperature variation. A mathematical model based on similarity criteria of heat-transfer was built to describe the drying process of fibrous materials, and the model parameters were determined. The differences between the kinetic curves of the single-directional and reverse drying processes. A method is suggested to divide the reverse drying kinetics into subsets to build individual mathematical models. The adequacy of the models was validated by the F-test.
CONDENSATION OF BENZYLAMINE WITH ISONICOTINIC ACID
Authors: Крюков Ю.А.
Published: October 2024

Конденсация бензиламина с изоникотиновой кислотой, в результате которой образуется N-бензиламид 4‑пиридинкарбоновой кислоты, является первой стадией синтеза современного противовирусного средства Энисамия йодида (N-метил-4-бензилкарбамидопиридиния йодида), известного на отечественном рынке под торговой маркой «Амизон». От выхода и качества продукта конденсации во многом зависит успешное проведение синтеза препарата и технико-экономические показатели производства фармацевтической субстанции Энисамия йодид. Проведены термоаналитические исследования N‑бензиламида 4-пиридинкарбоновой кислоты методами дифференциальной сканирующей калориметрии (DSC) и термогравиметрического анализа (TGA), изучена зависимость выхода N‑бензиламида 4-пиридинкарбоновой кислоты и степени конверсии изоникотиновой кислоты от количества бензиламина. Показана зависимость выхода N‑бензиламида 4‑пиридинкарбоновой кислоты от модуля по растворителю при кристаллизации из толуола. Полученные результаты могут быть использованы при организации производства фармацевтической субстанции Энисамия йодид.

The condensation between benzylamine and isonicotinic acid leading to N-benzylamide-4-pyridinecarboxylic acid is the first stage in the synthesis of the modern antiviral Enisamium iodide (N-methyl-4-benzylcarbomidepyridinium iodide), also known on the domestic market as Amizon. The condensation product yield and quality have a strong bearing on a successful synthesis of the drug and on technical-economic indicators of the manufacture of the active pharmaceutical ingredient Enisamium iodide. Thermoanalytical studies were done for N‑benzylamide-4-pyridinecarboxylic acid by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA), and the relationship between the conversion degree of isonicotinic acid and benzylamide quantity was examined. The product yield depending on the solvent mass ratio upon crystallization of N‑benzylamide-4-pyridinecarboxylic acid from toluene was shown. The findings can be used in organizing the manufacture of the active pharmaceutical ingredient Enisamium iodide.
OVERVIEW OF METAL-WATER HYDROGEN GENERATORS AND ELECTRIC POWER SOURCES BASED ON THEM
Authors: Морозова О.Н. , Антонникова А.А. , Конюхов И.Е.
Published: October 2024

В работе исследованы конструкции портативных генераторов водорода и источников электрической энергии на основе водородно-воздушных топливных элементов. Выяснено, что для получения H2 целесообразно использовать реакцию при взаимодействии металлических порошков и воды. Получение водорода таким способом устраняет необходимость в его хранении и транспортировке до момента использования и позволяет генерировать водород непосредственно на месте потребления «in situ». В результате обзора литературы по данной теме, выяснено, что помимо классических конструкций гидролизных генераторов водорода, при создании действующих макетов все чаще встречаются попытки регулирования скорости выделения водорода. Это позволяет избежать высоких давлений в системе, что в свою очередь делает генератор водорода безопасным устройством, подходящим для портативного применения. Представлены работы в которых показано, что на основе системы «генератор водорода – водород-воздушные топливные элементы» может быть создан автономный, портативный источник электрической энергии. Такое устройство будет обладать высокой эффективностью (КПД более 50 %), побочные продукты реакции химического производства водорода безопасны и могут быть переработаны повторно.

The paper investigates the design of portable hydrogen generators and electric power sources based on hydrogen-air fuel cells. It was found that for the production of H2 it is expedient to use the reaction in the interaction of metal powders and water. Obtaining hydrogen in this way eliminates the need for its storage and transportation until use and allows hydrogen to be generated directly at the point of consumption. As a result of a review of the literature on this topic, it was found that, in addition to the classical designs of hydrolysis hydrogen generators, when creating operating models, attempts to regulate the rate of hydrogen evolution are increasingly common. This avoids high system pressures, which in turn makes the hydrogen generator a safe device suitable for portable applications. The works are presented in which it is shown that on the basis of the "hydrogen generator - hydrogen-air fuel cells" system, an autonomous, portable source of electrical energy can be created. Such a device will have high efficiency (efficiency more than 50%), by-products of the reaction of electrochemical hydrogen production are safe, and can be recycled.
الفوائت المعجمية في شرح أشعار الهذليين للسكري (275هـ)، من بداية الكتاب إلى نهاية شعر المُعطَّل الهذلي
Authors: أديديجي شيخ يعقوب
Published: October 2024

تناول البحث الفوائت المعجمية في شرح أشعار الهذليين للسكري، من بداية الكتاب إلى نهاية شعر المُعطَّل الهذلي الكلمات والدلالات الواردة في شروح الشعر سواء أكانت في شعر الشاعر أم في شرح الشارح أم في شواهده، التي لم تسجل في مداخل المعاجم العربية. وهذا العمل نوع من الاستدراكات على معاجم العربية في الألفاظ والدلالة، لتشمل جميع المفردات العربية المستعملة في عصور الاحتجاج، وكذلك الكلمات اللهجية مع دلالاتها المختلفة. وقد اعتمدت على المنهج الوصفي التحليلي. وتوصلت الدراسة إلى نتائج عدة، منها:  1.وجود عدد من الكلمات العربية الغربية واللهجية والأجنية المعربة والمقترضة في شرح أشعار الهذليين، مع الإشارة إلى ذلك.، ومنها 28 كلمة فائتة لم تسجل في المعاجم العربية القديمة.  2.وتفيد معرفة هذه الفوائت في فن الصنعة المعجمية، إذ ترصد في مداخلها المناسبة في المعجم الكبير أو الشامل. ويستفاد من معرفتها وشواهدها في عمل المعجم العربي التاريخي. ويوصي البحث بعمل مدونة لغة مخصصة لغة هذيل تشمل مرداتها ودلالاتها، وأساليبها، وأمثالها وحكمها.
ثنائية الكرم والبخل في ديوان ابن حمير الهمداني: قراءة ثقافية
Authors: النعمي مسدف موسى
Published: October 2024

بوصف المضمر النسقي مسكوتا عنه في بنية النص العميقة، ينظر هذا البحث في إحدى الثنائيات الضدية في ديوان شاعر من شعراء الـمِخْلافُ السُّلَيْمَاني (العقيلي، 1990، 7-13، الأكوع، 2008 -2009، 8-18) في عصر الدول المتتابعة، إنه الشاعر محمد ابن حمير الهمداني (ت: 651هـ)، وقراءتها قراءة ثقافية؛ لمحاولة الوصول إلى المضمر النسقي، المتواري في حجاب الجمالي والأدبي والبلاغي، إذ يمكن الوصول إليه من خلال ثقافة المديح للسلطة السياسية في عصره، كونه شاعر الملك المنصور في عصر الدولة الرسولية (ابن حمير الهمداني، 1985، 21-22)، بوصف ثقافة المديح من المظان التي تتجلى فيها كثيرًا من المفارقات الدلالية بين النسقين، الظاهر على بنية النص السطحية، والمضمر في بنية النص العميقة، وقد قسمت البحث إلى قسمين، جانب نظري وآخر تطبيقي، يهتم الجانب النظري بالمصطلحات والمفاهيم، وينظر التطبيق في نماذج مختارة من الديوان؛ ليؤكد من خلالها تمكن النسق الثقافي من اللاواعي عند الشاعر.
The general situation of Covid-19 in Iraq
Authors: Hussain Eman Mohammed , Awad Hussein Kamil , Ibadi Emam Atiyah
Published: October 2024

The Coronavirus has caused the death of nearly five million people, according to data provided by the World Health Organization. In Iraq, in February 2020, the first confirmed cases of infection were announced, and it raised great concern due to the primitive health infrastructure. SARS-CoV-2 is a beta coronavirus belonging to the subgenus Sarbecovirus. The epidemic led to the loss of human lives that prompted the world to be cautious and fearful of the future, because due to the strength and ferocity of the virus, some factors that increased the severity of the disease, including weak immunity caused by some diseases like cancer. The respiratory system is the main target of the virus, but due to the systemic nature of the disease, the inflammatory condition may generalize and affect the rest of the body’s organs. Some methods have emerged aimed at stopping the chain of this epidemic, including social distancing and the use of sterilizers, but these measures are considered primitive when compared to the ferocity of the virus. Many research centers and scientists cooperated to find a suitable vaccine for the virus. In the beginning, companies used old methods to produce the vaccine, such as using parts of viruses and injecting them into the host. From here, companies began racing in a scientific way to find the appropriate vaccine. This review, discussed the health situation within Iraqi society regarding the Corona virus since the first infection was recorded. also discussed the targeted organs, the impact of diseases on the virus, and the vaccines used. We conclude that awareness is an important factor in avoiding global epidemics, which is represented by adhering to preventive measures and taking vaccines, as it has not become clear that the Corona virus is a seasonal virus, but rather what helps in its spread are the health conditions of the host, specifically the condition of the lungs.
Comparison of the production performance of some phenotypic groups and their crosses of quail birds
Authors: Tawfeq Esraa Mobasher
Published: October 2024

The study aimed to determine the production efficiency of local quail phenotypic groups with different feather colors (white, brown, and desert) and their crosses. The results showed significant differences between groups in average body weight at 2, 4, and 6 weeks of age, and in weight gain at 2 and 4 weeks of age in favor of the T6 cross followed by the T5 cross, while T1 recorded the lowest body weight and weight gain compared to other hybrids. Significant differences in feed consumption were observed at 2 and 6 weeks, with no significant differences at 4 weeks. The highest feed consumption was recorded at 6 weeks for hybrids compared to pure groups, and feed conversion efficiency improved at 2 weeks for T5 and T6. At 4 weeks of age, T5, T7, and T6 recorded the best feed conversion efficiency. Positive heterosis in weight at 4 weeks was observed in favor of T5, T6, and T7, while it was negative in T4. Body weight at 6 weeks increased in hybrids T5, T6, and T7 compared to their expected value in the parental groups, and feed conversion efficiency improved at 6 weeks in hybrids T4 and T7. We conclude that heterosis increases the economic value of hybrids, with T6 and T5 being the best hybrids.
Solitary Radiopacity Associated with Root of Unerupted Supernumerary Tooth - A Case Report and Differential Diagnosis
Authors: G J Chinmaya , R Poornima , G P Sujatha , L Ashok
Published: October 2024

Radiopaque lesions of jaws are innumerable and variable in appearance. There are several radiopaque lesions seen in the periapical region of tooth root which are indistinguishable from other lesions. The diagnosis and management of these lesions from clinical and radiographic features could be challenging to the dentist. Alterations in the bone could be inflammatory cystic odontogenic and non-odontogenic neoplastic reactive vascular traumatic dysplastic or metabolic in origin. As intraoral periapical radiographs IOPA provide the best image resolution they can aid in identifying the subtle changes in the bone architecture periodontal ligament Pdl space and lamina dura. Radiographic analysis of the involvement of adjacent structures using panoramic imaging is not sufficient for diagnosis as it provides 2D imaging of a 3D object. Cone Beam Computed Tomography CBCT provides an accurate 3D image of the involvement of bone and adjacent structures. Systematic radiologic analysis of lesions based on their location size shape borders internal structure effect on surrounding structures and consideration of clinical signs and symptoms enable clinicians to arrive at a reliable diagnosis. Here we present a case report of an asymptomatic radiopaque lesion associated with the root of an unerupted supernumerary tooth which was accidentally detected on an IOPA taken for treating the adjacent tooth.