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Бюллетень науки и практики @bulletennauki
Статьи журнала - Бюллетень науки и практики
Все статьи: 6993
Experimental study on heat transfer and pressure drop in plate heat exchanger using water-water
Статья научная
It would be misguiding to consider only cost in design of a heat exchanger because high maintenance costs increase total cost during heat exchanger’s services life. Therefore, exergy analysis and energy saving are very important parameters in heat exchanger design. In this study, the effects of pate heat exchanger (PHE, Ridan HHN no. 04) on heat transfer, friction factor and exergy loss were investigated experimentally. Experiments were conducted from laminar flow condition to turbulence flow condition under counter flow condition. Reynolds number and Prandtl number were in the range of 220
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Experimental study on heat transfer of pulsating flow enhanced the plate heat exchanger
Статья научная
We conducted two sets of experiments, one is under steady-state conditions and the other under pulsating conditions. We focused on measuring the heat transfer characteristics of plate heat exchangers under different pulsation conditions. In the experiment, we control the mass flow of the hot fluid to circulate at a rate of 0.722 kg/s. The mass flow rate of the cold fluid is 0.05-0.18 kg/s, and the pulsation frequency is 0.45-2.23 Hz. We measured different mass flows at different pulsation frequency. The data analysis shows that when the pulsation frequency is 1.78 Hz, the heat transfer coefficient reaches a maximum of 4415.73 w/(m2·k), and the corresponding cold fluid mass flow rate is 0.155 kg/s, and compared with the heat transfer characteristics of the plate heat exchanger under steady flow, it is found that the average increase in the heat transfer coefficient during the transition to the pulsating mode was 20%.
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Experimental study on unidirectional flow characteristics of flow diode
Статья научная
Flow diode is a kind of control fluid one-way flow of components, it has many advantages, such as simple structure, no rotating parts, no need for external control, power, high reliability, in the medical industry, nuclear industry, petrochemical industry, flow diode has a wide range of applications. By studying relevant literature, combined with the actual situation, based on the experimental study method, using air pump, pressure regulator, 3 d printers and other laboratory equipment, by changing the pump seal the air inlet, simulation of different flow diode under different conditions make the fluid flow through, will pump displacement into displacement, record each air inlet in unit time displacement, and then compared these data, the flow is obtained by carefully analyzing the flow characteristics of diode and the relationship between the fluid flow characteristics diode, it is concluded that: the displacement increases with increase of voltage; when the aperture changes, the flow diode will produce important changes; unstable flow characteristics of variable diameter flow diode.
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Статья научная
A universal technique has been suggested for express-evaluation and minimization of labor and financial resources for sustainment of administrative agencies. It is suitable for any country and allows evaluating potentialities for reducing the resource intensity of administrative processes, optimizing administrative personnel staffing levels, and identifying and excluding overlapping of processes and operations. This article was prepared on the results of research carried out with the support of the Russian Foundation for Basic Research (RFBR)-project 15-01-06324/15 “Modeling ofproduction and management processes for rapid assessment and optimization of resource consumption of goods and services: the formation of a universal methodology and tool support”.
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Expression of figurative thinking of children in the heroes of works of art
Статья научная
This article examines several examples of children's literature and analyzes the characteristics, psyche, worldview and thinking of children who are the protagonists, showing the advantages of the age-specific form of thinking in figurative thinking.
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Extracurricular work as a means of motivation to learn a foreign language
Статья научная
This article defines the principles of the organization of extracurricular work in a foreign language, the influence of extracurricular activities on the expansion of students' cultural views, the development of their creative activity, aesthetic tastes is noted. The purpose of the study is to generalize and systematize the theoretical and practical experience of extracurricular work in a foreign language in secondary schools.
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Factors Influencing the Decline of Biodiversity in Azerbaijan
Статья научная
The natural vegetation and its flora of Azerbaijan are exposed to anthropogenic influences, leading to a decrease in the number of a number of valuable plant individuals or their complete destruction. The main result of the factors affecting the reduction of biodiversity in Azerbaijan is the disruption of the ecological balance of the country, which threatens rare and endemic species. As a result of the reduction of biodiversity, the ecosystems of Azerbaijan are weakened and rare species are at risk of extinction. The sustainability of natural resources and the environment is seriously threatened. As a result of the disruption of ecosystem stability, the ability of local populations to use natural resources is limited and the resilience of ecosystems to climate change is reduced.
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Factors of economic stability of Russia in conditions of sanctions
Статья научная
In the article directions of development and stabilizing of economy of Russia are examined in the conditions of external economic approvals and internal budget constraints. The consequences of introduction of approvals and possibility of the economy growing are analyzed: investment height, forming of the Asian vector of international relations and support of home production.
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Factors shaping social debt and feelings of pride during adolescence
Статья научная
The problem of forming a sense of social debt and pride in adolescents is of a social nature. Consequently, the formation of a sense of social debt and pride in adolescents encourages them to work selflessly for the prosperity of the Motherland, the prosperity of the country and the well-being of the people. The article discusses the factors that shape social debt, pride, social environment, humanity, pride and sense of value in adolescents.
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Family and higher educational institutions - grades of stability in gender relations
Статья научная
The family is focused on stabilizing grades in gender relations and educational institutions. Children need to have the knowledge their family needs before they start working. At the same time, the family is focused on stabilizing grades in gender relations and educational institutions. It was emphasized that young people should have the knowledge needed by their families before starting work. The principles of legality, democracy, openness and transparency, and equal rights for women play an important role in ensuring gender equality and mutual understanding. The essence and principles of the OSCE to ensure equality of women are revealed, regardless of race, nationality, language, religion, social origin and faith, as well as personal social status. In the family and in universities, gender culture is ensured, as well as improvement and management of change during the period of study; the line of action to ensure gender-role orientation is aimed at a set of template models. Students must clearly role model one gender or the other.
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Статья научная
This article explores the concept of family as both a part and a whole within mountain communities, focusing on how climate and ecological conditions shape family structures and dynamics. Mountain environments present unique challenges, such as harsh weather conditions, limited resources, and geographical isolation, which significantly influence the way families organize, interact, and support each other. The study examines how these environmental factors foster a collective resilience among family units, emphasizing interdependence, communal support, and adaptation strategies that are distinct to mountainous regions. By analyzing the interplay between ecological conditions and social structures, the article highlights the critical role of the environment in shaping familial relationships and communal cohesion. This research contributes to a broader understanding of how families function as both individual units and integral parts of larger social and ecological systems in mountain communities.
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Family institute: object and evolution
Статья научная
This article discusses the socio-philosophical, ethnological views of the institution of the family and their evolution as well as the issues that have so far been neglected.
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Features of Mark Twain's humorous stories
Статья научная
The article deals with the early short stories of Mark Twain. It illustrates the key features of the humor of Mark Twain’s short stories, and the role of American lifestyle, especially in the Western region’s historical culture, folklore and traditions of newspapers humor in the formation of Mark Twain as a writer. There is an analysis about the mutual relations between humor and critique in the article too. To our conclusion humor was not the main goal in the literary activity of Mark Twain, the main principle and goal of the writer’s works were to discover the materials coming from hypocrisy, dissimulation, ugliness and realities of those times, and their comic potential. That is why to use widely the ways and methods of the comic elements helped the writer to show and describe the personages, characters, things and objects in a conflicting manner with their full details and bareness in various colors.
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Features of competence-oriented task use at mathematics lessons
Статья научная
This article discusses features of competence-oriented tasks used in mathematics lessons. Result of education is not only knowledge of specific disciplines, but also ability to apply them in everyday life, for use in the future training. And this largely depends not on the knowledge, skills and practices acquired, but on some additional qualities, competencies and more relevant to understanding the modern goals of education. Introduction of these concepts into teaching practice in school has required a change in the content and methods of education, specification of activity types that school students have to master at the end of an educational process and in the study of individual subjects. Success of today’s student in the future largely depends on his/her ability to acquire and develop skills, practices and competencies that can be used in any life situation. Therefore, it is necessary to educate children in readiness for change, developing of qualities such as mobility, constructiveness and ability to learn.
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Features of distribution of oil and gas deposits in the earth's crust
Статья обзорная
Hydrocarbon deposits within oil and gas-bearing territories are distributed very unevenly both in area and in the section of sedimentary deposits, which is the main geological feature of oil and gas placement in the subsurface. The formation of hydrocarbon accumulations in the sedimentary cover is due to a set of genetic factors, which ultimately determines the patterns of placement of oil and gas accumulations along the section and area of the sedimentary cover. The study of the factors determining the zonation of oil and gas accumulation and genetically her condition, zoning of oil and gas formation, contributes not only to expanding our knowledge on the fundamental problems of petroleum geology, but also improve the efficiency of exploration.
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Features of education of tolerance of young schoolchildren
Статья научная
Currently, humanity is divided into different societies called states. Although not all states are multinational, they are multicultural. History and current events clearly prove that no society has yet been recorded as being based on tolerance in relationships, civil solidarity and individual respect. In this regard, the problem of tolerance is considered important both at the international and national levels. Tolerance is a complex social-pedagogical, philosophical phenomenon that has different meanings within the spheres of knowledge of different people, and at the same time it is an ethical-philosophical concept, a socio-cultural phenomenon, a socio-political solution method, a principle of mutual relations between people. Junior school age is a sensitive period of tolerance education. In children, this age period is more intensive in the process of general development of personality.
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Features of emotion verbalization
Статья научная
The presented article is devoted to the study of the lexical and semantic role of emotions. Language serves not only to convey information, but also to express the inner world of the speaker. Emotions are multifaceted. Impressions in themselves are not considered linguistic phenomena, but learning the language of a speaking subject is one of the approaches to understanding human emotions. The study of the emotional world of a person involves the researcher’s appeal to a number of humanities: psychology, sociology, linguistics, philosophy. Cognitive science makes it possible to combine various theoretical platforms for a comprehensive study of this complex, multidimensional phenomenon, since a characteristic feature of modern linguistics is the search for linguistic modeling of a person in a close objectively existing relationship with other related human sciences.
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Features of medical terminology teaching in English lessons
Статья научная
The purpose of this study is to consider issues related to the teaching of English for medical purposes in modern higher education. As you know, English is an integral part of a successful professional career in medicine. In addition, various international projects in the field of medicine are becoming more widespread, participation in which is also an important part of professional development for medical workers. In this article, the authors substantiates the importance of reviewing certain aspects of teaching English to medical students and offer their concept of an English course for medical purposes.
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Features of teaching young preschool children a foreign language
Статья научная
The relevance of early learning of a foreign language is determined by the needs of society. Teaching a foreign language to preschool children creates excellent opportunities for learning a foreign language. In this regard, this article is devoted to the need to study the peculiarities of teaching young children English in order to achieve the most effective result in its further study. The purpose of the work is to identify and describe the features of teaching English to young children, to identify methods that allow developing constructive interaction between teachers and students, as well as the development of lesson plans. The object of the study is the process of teaching a foreign language. The subject of the study is the use of methodological recommendations in teaching preschool children. The question of when to start teaching a child a foreign language is of interest to many parents. This is quite expected, because knowledge of at least one foreign language in our time has turned from a desire into a necessity.
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Features of the Lonicera L. shoots growth under the Absheron conditions
Статья научная
The research analyzed the growth dynamics of annual shoots of some species of Lonicera L. in Absheron conditions. According to the seasonal dynamics of growth and development of species, Lonicera species are divided into 2 groups: straight and ivy species. The model species include deciduous, semi-evergreen and evergreen species, but these features of their life forms do not affect the growth process. Studies have shown that in the genus Lonicera L., regular growth was observed during the growing season, while in the straight species the growth was completed in July. The observed increase in hydrothermal stress had a positive effect on the growth and branching of the shoots, and an increase was observed. This growth parameter is dominated by ivy Lonicera L. ( L. caprifolium and L. etrusca ). Intensive growth was observed in Absheron in May-June and September.
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