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Бюллетень науки и практики @bulletennauki
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Все статьи: 7472
Infinitesimales, a divergence and methods of summation
Статья научная
Positive definitions made it possible to prove new theorems on well-known objects of analysis: numerical sequences and series. The estimates of the quantity of all primes and the largest of them are obtained.
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Influence of at winglets wingtips on the inductive reactance of the wing
Статья научная
In this article by the method of equations of steady horizontal flight the impact of AT winglets wingtips on the inductive reactance of the wing is explored. The total aerodynamic force, created by all four parts of the wingtips is determined. The vector of the total aerodynamic force of the wingtips is represented in the form of components of a linked coordinate system. Equilibrium equations for the steady motion of an aircraft with AT winglets wingtips in a horizontal flight are recorded. From these equations it is obtained that, in the direction of motion, the longitudinal component of the vector of the total aerodynamic force of the tips reduces the inductive drag of the wing, the vertical component is added to the lifting force of the wing, and the lateral component, due to symmetry, is zero. It is shown that the lifting force created by the AT winglets wingtips is larger compared to the same ones created by the upper tips. An important consequence is that the distribution of the lifting force over the wing span with double tips is more even in comparison with the wing without a tip or with a wing with the upper wingtip. The expression for the effective aspect ratio of the wing with the tips is determined, which is greater than the inductive drag of the wing without the tip. An interesting result is obtained: for identical aircraft weights, the product of effective aspect ratio of the wings with double and only upper wingtips on their coefficients of inductive resistance is equal to the product of the wing aspect ratio without a tip on its coefficient of inductive resistance. This law can also be formulated as follows: at the constant weight of the aircraft, the effective aspect ratio of the wing with the tips by its coefficient of inductive resistance is a constant value, independent of the form of wingtips.
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Статья научная
Determination of optimal fertilizer norms under tomato vegetation related to vegetable growing is a very important issue. For this purpose, the influence of various forms of nitrogen on the background of organic fertilizers on the background of the biometric data of the “Preliminary” tomato varieties, the total nitrogen, phosphorus and potassium content of tomato bushes have been studied. Also, the biochemical indicators of tomatoes were studied. It has been shown that no fertilization of the fertilizers in the fertilizer (10 t/ha) + N90P90K90 was observed in the fertilizer, but the tomato fruit weight and diameter increased, and the nitrates contained in it did not exceed the norm.
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Influence of sodium chloride on physiological and biochemical characteristics of wheat genotypes
Статья научная
The effect of sodium chloride on physiological and biochemical parameters of wheat genotypes was studied. Wheat plants were grown in pots in soil with the addition of 0.5% sodium chloride. To create new salt-tolerant wheat varieties, a comparative analysis of morphophysiological and biochemical parameters of plants was carried out. Morphological and physiological parameters such as growth, chlorophyll and carotenoid content, photochemical activity of chloroplasts and PSII activity were studied in wheat plants. The effect of salt on the amount of chlorophyll a, chlorophyll b and carotenoids, which are the main physiological parameters, is manifested differently in both plants. When studying the salt tolerance of plants, differences were found in the relative amount of chlorophyll (a+b), carotenoids, as well as the photochemical activity of chloroplasts and the efficiency of PS 2. Among the varieties, according to all morphophysiological and biochemical indicators, the soft wheat variety Mirbashir 128 turned out to be the most resistant to the effects of salt.
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Influence of some environmental factors on the phanerophytes in ex situ conditions
Статья научная
The article studied and analyzed the effects of wind, light and temperature on the phanerophytes used in landscaping the Absheron Peninsula (Azerbaijan). When studying the interaction of light with the studied plants, it was found that 311 species are heliophytes, and 51 are sciophytes. The study showed that 298 species unstable to wind and 64 wind resistant. In terms of heat resistance, the studied plants were divided into 3 groups: resistant to high (54-56 °C), moderate (52 °C) and low (48-50°C) temperature. The results of the study showed that these environmental factors are crucial and make a number of changes in the dynamics of plant development.
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Influence of wingtip type at winglets on the aerodynamic quality of wings
Статья научная
In this article by the method of equations of steady horizontal flight the impact AT winglets wingtips on the wing aerodynamic quality is explored. Determine the total aerodynamic force, created by all four parts of the endings. The vector of the total aerodynamic force of the endings is found in the form of components along the associated coordinate system. Equilibrium equations for the forces acting on the aircraft are recorded, with the linear motion of the aircraft with wing tips of the AT winglets type in a horizontal flight established. From these equations it is obtained that, in the direction of motion, the longitudinal component of the vector of the total aerodynamic force of the tips reduces the drag of the wing, and the vertical component increases the lifting force and this increases the aerodynamic quality of the wing. The components of the vector of the total aerodynamic force in the transverse direction from the left and right ends of the wing counterbalance each other By virtue of symmetry. Naturally, provided that the weight of the aircraft is constant and the speed of a straight horizontal flight, the angle of attack of the aircraft with the wing with endings like AT winglets should be reduced in order to observe the equality of the lift and the weight of the aircraft. A decrease in the angle of attack, in turn, leads to a decrease in the drag force. The effect of the aerodynamic wing tips on the maximum value of aerodynamic quality is studied. The expression for the aerodynamic lift coefficient at the most advantageous angle of attack is found. It is shown that the aerodynamic wing tips reduce the coefficient of lift of the wing without endings at the most advantageous angle of attack.
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Статья научная
In this paper, the process of adsorption of phenol derivatives, polyaminopolycarboxylic acids (PFPA) and tertiary amine salt, modeled on semi-empirical ZINDO/1, on iron (available in different grades of steel in the amount of 90-97%) is presented. The structures of the phenol derivatives for the study were chosen without complicating the structure, and the isomers of the position of the substituents were chosen. The structures of polyaminopolycarboxylic acids for the study were chosen according to the structure complication. In the course of the study, the following compositions were obtained and analyzed: compositions of the complexes obtained, global and local electrophilicity values, a graph showing the dependence of the charge density on the iron atom on the protective effect. For the first time, the interclass aspect of corrosion protection will be considered, where the generality of the investigated quantum-chemical approach for different classes of organic inhibitors, which are also found in different corrosive environments, will be proved.
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Статья научная
This article examines the poultry disease laryngotracheitis, caused by opportunistic microbes that result in economic losses for poultry farms in Azerbaijan. Factors contributing to the spread of laryngotracheitis are identified. Recommendations for the use of plants with anti-inflammatory phytobiotic activity are offered. Strict veterinary monitoring is recommended to prevent the occurrence of such viral infectious diseases. Periodic general and laboratory examinations, proper care, the use of plants with phytobiotic activity, and limiting contact between objects and living creatures outside the confines of a single room minimize the risk of infection and spread.
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Статья научная
The increase of economic efficiency of entrepreneurial activity in the sphere of production of poultry farming on the basis of introduction of innovative technologies is considered, the methodology of management of the innovative development of a poultry farm adapted to branch features is developed. The proposed model for the organization of innovation activity provides for systematic monitoring of the R & D industry market, the implementation of a preliminary assessment of innovation in terms of its scientific and technical viability, efficiency and feasibility, the formation of a database of sectoral innovations, the coordination of the analyzed innovation project with the enterprise strategy and its inclusion in the innovative program of the poultry farm. Proposals on improving the organizational structure of poultry enterprises are presented.
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Innovative strategies for English language learning in Kyrgyzstan: the importance of media
Статья научная
Learning a new language is often perceived as a complex task, necessitating practice across multiple skills. This research examines the significant role of media and institutional resources such as TikTok, YouTube, Netflix etc. in enhancing the learning of English languages in case of Kyrgyzstan which is under Russian language influence. These resources empower English language teachers by bridging communication gaps and facilitating clearer explanations of concepts. By minimizing teacher talk, lessons become more engaging for students. Furthermore, they offer opportunities for learners to see, hear, and interact with the language, thereby increasing their interest in English. These resources also provide real-life experiences that encourage active participation, making learning more concrete and relevant. Additionally, they enhance retention rates, transform the teacher’s role from a knowledge dispenser to a facilitator, and allow students to progress at their own pace. Moreover, they stimulate practice, foster discussion, and inspire higher levels of achievement among students. Employing case study and descriptive methods, this research analyzes the role of authentic language in language learning, exploring ideological patterns in news structures. The findings present practical strategies applicable in language classrooms to improve both language proficiency and socio-cultural awareness. It is recommended that innovative strategies establish a framework to help learners reflect on their language learning experiences.
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Innovative teaching methods of idioms
Краткое сообщение
The focus of the article is on the idea of idiom teaching. The article aims to identify the main ways in which idioms are taught. A lot of attention is paid to the understanding of the meaning of the term ‘idiom’, to the main classifications of idioms and to the sequence of learning idioms. It has been found that it is necessary to study idioms comprehensively: pronouncing, reading, meaning, using, spelling, practicing. The article also argues for the importance of teaching idioms for better mastery of English.
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Insulin resistance: mechanisms, clinical implications, and regional perspectives
Статья научная
Insulin resistance (IR) is a significant pathological condition marked by the impaired response of peripheral tissues such as skeletal muscle, liver, and adipose tissue to insulin, which results in disrupted glucose homeostasis. This dysfunction in insulin action is a key contributor to the development of numerous chronic diseases, including type 2 diabetes mellitus (T2DM), metabolic syndrome, and cardiovascular diseases. The increasing prevalence of IR worldwide has sparked widespread concern in public health, as it plays a pivotal role in the onset and progression of these conditions. In addition to its physical manifestations, IR is also linked to a range of molecular and biochemical alterations, which compound its detrimental effects on overall metabolic health. At the molecular level, the pathogenesis of IR involves a complex interplay of multiple mechanisms, including dysregulated insulin signaling, chronic low-grade inflammation, lipotoxicity, and endoplasmic reticulum (ER) stress. These cytokines promote the phosphorylation of insulin receptor substrates at serine residues, hindering the cascade of events required for effective glucose uptake and utilization. In addition, the accumulation of lipids in non-adipose tissues-termed lipotoxicity-further exacerbates insulin resistance by impairing the function of insulin receptors and signaling molecules, contributing to the progression of metabolic dysfunction. As this complex condition progresses, it is associated with an increased risk of several other serious health issues, including cardiovascular disease, kidney dysfunction, and certain forms of cancer. Consequently, understanding the underlying mechanisms of IR is crucial for the development of targeted therapies and interventions aimed at preventing and managing these associated diseases. Studies from various countries, including Turkey, Russia, and Azerbaijan, provide valuable insights into the prevalence and impact of IR across different populations, highlighting the need for context-specific approaches to diagnosis and treatment.
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Integrating multimedia technology into teaching intercultural communication
Статья научная
It is widely known that enhancement of the system of teaching foreign languages can be achieved by introducing progressive teaching methods as well as using modern teaching and information-communication technologies thus enabling them to access the achievements of the world civilization and globally available information resources, ensuring international collaboration and communication. Nowadays, culture is playing an important role in foreign language teaching and learning, therefore, a lot of researches have been done in this field in recent years. It has been recognized that a language is used as the main medium through which culture is expressed. It is believed that students are aware of language rules but are not always capable enough to use the language sufficiently as they do not have a sound knowledge of the target culture. Nevertheless, “pure information” is insight; while the development of people’s cultural understanding leads them to better critical thinking. There are ample methodologies for developing learners’ intercultural competence. The present study also seeks the ways of developing a model of blended learning course on intercultural communication.
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Статья научная
This article examines the integration of artificial intelligence (AI) into accounting as a tool for process optimization and risk management. The benefits of AI, such as automation of routine operations, increased data accuracy, improved reporting transparency, and support in risk management, are discussed. Particular attention is paid to how AI contributes to predictive analytics and error prevention, which reduces the likelihood of financial losses. The challenges associated with the implementation of AI are also analyzed, including high financial costs, data protection requirements, and staff adaptation.
Бесплатно
Статья научная
Examines the integration of artificial intelligence (AI) into educational programs aimed at developing scientific analysis skills in an interdisciplinary context. Various AI technologies, such as machine learning, natural language processing, and intelligent educational platforms, are explored for their potential to transform approaches to learning and enhance the effectiveness of educational processes. The results of experimental analysis are presented, demonstrating that the use of AI contributes to improving student performance and developing critical thinking skills. The article also addresses the potential risks and limitations of applying AI in educational processes.
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Integration of the pedagogical culture of parents with the pedagogical culture of the teacher
Статья научная
This article speaks about the pedagogical culture of parents and teachers, which is passed on to future generations who are currently being educated. It is well known that all phenomena occurring in society that cannot be understood by a human being come from our own inability to guide and guide us in the right direction. To prevent such incidents, the parent and the school, the child must maintain close contact with three of them, and he offers open, free communication with three of them. Only when there is open, free communication between them, the child begins to open up and share his content with his parents or teacher. Everyone should train the child to solve their problems from an early age, without quarreling and talking freely.
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Intellectual agility: a toolkit of varied techniques for critical thinking
Статья научная
This article describes the essence of critical thinking, the existence of various tools for developing critical thinking, and the need to use a set of techniques to deeply understand and learn these tools, as well as the ways and conditions of their implementation. Also, in this article, several practical examples and manuals are presented to further develop critical thinking, to be able to use a wide range of techniques, and to be able to appropriately use the various critical thinking tools cited as examples, some of which are presented in pictures and test views.
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Inter-national and inter-ethnic tolerance formed among the people of Azerbaijan
Статья научная
Azerbaijan is one of the most multi-ethnic and minority nations, as well as ethnic groups, living together in the world. More than 50 local and at the same time representatives of small ethnic peoples live in the territory of the Republic of Azerbaijan. The people of Azerbaijan have a rich historical experience in the field of development and support of interethnic relations and multiculturalism. The President of the Republic of Azerbaijan, Mr. Ilham Aliyev, has repeatedly stated that Azerbaijan is a tolerant state, all peoples live in peace and security in Azerbaijan.
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Inter-subject communications in the learning of mathematics
Статья научная
This article describes the study of mathematics inter-subject communication in institutes, where the need to pay special attention to the relationship of mathematics with other subjects, especially with the basics of economic knowledge. Inter-subject communication is raised to a higher level of scientific weight training process, providing multifaceted influence on the personality of students, ensuring unity of education, educational and developmental functions. So much attention in institutes for economic education is primarily due to the fact that economic knowledge defined by renowned economists who can teach economic theory necessary for the formation of the economic way of thinking and economic culture of the students. Besides knowledge form the basis of economic education and training student. Influence of inter-subject communications so broadly that it covers the area of teaching all disciplines affects the curriculum, programs and textbooks, beyond the narrowly defined as training, affecting the formation of the world students. So there is every reason to believe inter-subject communication one of the principles of didactics.
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Interactional competence or communicative competence: overview of related theories
Статья научная
The article analyses the relationship of communicative and interactional competences by providing chronological evolution of the terms and discussing contrasting and similar approaches the language scholars presented earlier. Besides, relevant examples for issues of testing and assessing these two competences are illustrated to show the gaps between communicative teaching and testing.
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