- Все статьи 7472
-
Бюллетень науки и практики @bulletennauki
Статьи журнала - Бюллетень науки и практики
Все статьи: 7472
Pulsating enhanced heat transfer
Статья научная
The paper mainly introduces the mechanism of turbulent fluid heat transfer enhancement and the factors affecting heat transfer. The physical parameters of pulsating fluid mainly include pulsation frequency and amplitude. The factors affecting heat transfer are the physical properties of the pulsating fluid and the installation of a pulsation generator. The position, the type of pulsation occurrence, the natural frequency of the heat exchange system, etc.; the methods for strengthening the pulsating heat transfer characteristics mainly include disturbing flow elements, changing the size of the flow channel structure, compound heat transfer enhancement, and setting the induction vibration device in the flow channel.
Бесплатно
Punctuation in English and Russian languages
Краткое сообщение
Punctuation or punctuation marks in English, as in Russian, is used to separate sentences, parts of complex sentences and words, to express intonation and semantic emphasis of individual words. In both languages, punctuation in the text is governed by certain rules, but in English these rules are less strict. Good punctuation is the ability to make the right choice in the right place so that the reader can best understand the author’s intonation. In the article the authors analyze the use of punctuation marks in English and Russian. Differences and similarities in the use of punctuation were also demonstrated in the article.
Бесплатно
Punctuational division of literary discourse
Статья научная
Author’s punctuation is a system of punctuation marks outside of official usage, pursuing certain artistically justified purposes. The article is devoted to the study of the role and significance of punctuation in literary discourse. The author studies the history and origin of the sources of punctuation marks. Also, the essence of literary discourse is outlined and the ways of transmission of this discourse are described. The use of certain punctuation marks is justified.
Бесплатно
Qualitative and quantitative analysis of the ‘happiness’ category in the Plato's writings
Статья научная
The article presents the results of the content analysis of the category ‘happiness’ in the philosophical heritage of Plato, conducted while taking into account the different periods of his writings. The appeal to the works of the great philosopher allowed not only to clarify the true meaning of this philosophical category but also to admire the contribution of the great philosopher to the formation of ethical norms and values of mankind.
Бесплатно
Статья научная
For the analysis of dynamic processes in the system while ensuring its safety and for the adoption of appropriate management conclusions, it is likely to introduce the apparatus of sign-oriented graphs-digraphs. This installation has a conditional mathematical simplicity that allows overcoming the known obstacle of significant computational effort that occurs due to the need to take into account a large number of important points. At the same time, this setting is slightly sensitive to the accuracy of the initial data. As a result, it allows forming adequate models on the dependencies of the quality level. All this determines the need and prospects of using the apparatus of digraphs in the presented subject area.
Бесплатно
Quality control methods for turkey meat products
Статья научная
The article under discussion considers methods of quality control of turkey meat products. The author believes that the quality control of food raw materials and food products is a significant stage in the production of food products. It is important to organize research aimed at improving the quality and safety of turkey meat products, using accurate, rapid, and highly effective methods of infrared spectroscopy and chromato-mass spectrometry to determine its chemical composition to develop methods to determine the correctness of HS codes.
Бесплатно
Статья научная
The soil and climate conditions in Azerbaijan enable the extensive development of the licorice along with other technical crops. The licorice has been known to people since ancient times, and today in various fields of national economy, in medicine, in solving the problem of feeding with agricultural products, creating a diverse feed base for livestock is one of the most important problems. In the article, the quality indicators and nutritional value of licorice were studied depending on the development phase in the north-eastern part of the Lesser Caucasus.
Бесплатно
Quality indicators of the fourth generation hybrids resistant to floury frost disease
Статья научная
In the article, the quantitative and qualitative indicators and correlations between the fourth (F4) generation hybrid samples obtained from the hybridization of wheat genotypes introduced from international centers and local varieties selected for their resistance to diseases and distinguished by high quality indicators were studied.
Бесплатно
Статья научная
In the published work, the process of adsorption of organic derivatives of thiourea and dicarboxylic acids (thiourea class) modeled with semi-empirical ZINDO / 1, on iron (97% in steel St3, Poland) is presented. The structures of “thiourea” for the study were chosen so that the sequential complication of the molecular structure could be traced. Such an approach, as will be shown below, reflects with high accuracy the process of protection against corrosion with bacterial content by chemisorption of an organic compound on the metal surface with the formation of a complex compound. In the course of the study, the following compositions were obtained and analyzed: the compositions of the complexes obtained, global and local electro-filter values, a graph showing the dependence of the local electrophilicity of an arbitrary heteroatom taken by the author. The graph shows the equations of the obtained lines.
Бесплатно
Quantum-chemical substantiation of corrosion inhibition of steel with some amino acids
Статья научная
The article describes the process of α-amino acid adsorption on iron of mild steel immersed in 0.01 M H2SO4, this process was modeled using HyperChem 8.0.8 and ZINDO/1. This method reflects the protection against corrosion by chemisorption of α-amino acid on the surface of metal to form a complex adduct, reliably. The compositions of obtained complexes, the energy of boundary orbitals, a graph depicting the dependence of the charge density on the iron atom and the energy of higher occupied molecular orbitals on the anticorrosive protective effect were obtained and analyzed. On the graphs one can see the equations of lines.
Бесплатно
Radiative heat transfer in the furnace space with variable volume
Статья научная
The combustion chamber and flues boiler radiant heat exchange occur between the gas (combustion products) and limiting gas surfaces of the combustion chamber and flues. In this case, part of the energy-emitted gas is absorbed by the surfaces, and part of it is reflected into the gas. The resulting heat flow between the gas and the surface defined by the difference between the amount of energy emitted by the gas on the surface, and the amount of energy absorbed by the gas from the radiation surfaces. The article presents the basic formulas for boilers on solid fuel with movable grate. Calculations show that the change in volume of the furnace leads to a change in radiant heat transfer.
Бесплатно
Radioecological assessment of uranium tails deposits (Sumsar, Shekaftar, Terek-Sai)
Статья научная
The article presents the results of radio ecological studies of the territories of uranium tailings in Kyrgyzstan (Sumsar, Shekaftar and Terek-Sai), as well as their current state and assessment of the radioactive contamination’s potential risks. The ore field of this region is characterized as an extremely complex structure and covers about 30 ore occurrences of lead and rare metals. Starting from the Precambrian period both applicative and disjunctive disturbances within its boundaries have been widely developing and being manifested many times throughout the history of geological development. Oxidized and sulfide ores have been developed within the deposit. Unfortunately, serious miscalculations were made. As result of natural disasters; such as earthquakes, landslides, mudflows, etc., several uranium tailing dumbs have been damaged. Day by day, the risk of destruction and the threat of radioactive contamination of the Kyrgyz Republic territory are increasing. There are eight tailing dumps on the territory of Shekaftar uranium natural-technogenic province, the total volume of which is 1194 thousand m3 of radioactive waste. There are 15 mountain dumps of substandard ore with an ore volume of 4585.6 thousand m3 hour, in local areas it exceeds 500 μR/h.
Бесплатно
Статья научная
The ability of aquatic ecosystems to self-purify is closely dependent on many natural factors. The purpose of the study is to assess the self-purifying ability of surface waters for pollutants along the coastal zone of the Caspian Sea (in the territory of Azerbaijan) under the influence of abiogenic factors - climatic, hydrodynamic, hydro chemical, etc. The system analysis revealed a general pattern : in general, the self-purifying ability of river systems along the Caspian coastal zone increases in the direction from south to north. In order to preserve water quality in river systems, it is important to develop a set of measures to protect biodiversity in these coastal terrestrial ecosystems and water catchments (watersheds) on the northeastern slope of the Greater Caucasus.
Бесплатно
Rare endangered species of the Rosaceae family of the Rosa L. genus in the flora of Azerbaijan
Статья научная
The study examined the distribution areas, status, biological characteristics, reproduction, causes of changes in natural resources, applied conservation measures of species belonging to the Rosa L. genus in Azerbaijan on scientific basis. The research has used the research work of many botanists and my personal research. Numerous expeditions and monitoring were carried out in the research work, 64 species of Rosa L. genus were found in the natural and cultural conditions in the republic. Observations have shown that the range of most species of the Rosa L. genus has been reduced, and some are endangered. The research analyzed the reasons for the reduction of the habitats of 33 species of 64 species of the Rosa L. genus, the risk criteria of these plants according to version 3.1 of the IUCN.
Бесплатно
Rare types including Iridaceae juss. of the Garagush mountain
Статья научная
The genus Iris Tourn. ex L. of the family Iridaceae Juss. there are 200 different species in the Northern Hemisphere. There are more than 30 species of this genus in the territory of the Republic of Azerbaijan, some of which are endemic to Azerbaijan or the Caucasus. All irises are decorative and used in ornamental gardening. Iris caucasica Stev. ( Iris caucasic a Hoffm.) and I. lycotis Woronow ( Iris iberica subsp. lycotis (Woronow) Takht.) grows on rocky and grassy slopes of The Garagush Mountain. Iris caucasica Stev. is included in the Red Data Book of Nakhchivan AR as an important subcatagory of protection with the status of Lower Risk - LR (a - Conservation Dependent - CD). Iris lycotis Woronow has been to its activity and other abiotic factors, its range is reduced its biology is poorly studied and it is included as an endangered species in the Red Data Book of Nakhchivan AR with the status of Near Threatened - NT. Species included in this category should be enshrined in special protected areas and their biological characteristics should be studied.
Бесплатно
Rashes and their Misdiagnosing as Bacterial Infection in India
Статья научная
Background The public health landscape in India is currently characterized by two converging crises: the increasing incidence of emerging and re-emerging viral exanthems—including Hand, Foot, and Mouth Disease (HFMD), Chikungunya, Dengue, and Mpox—and the escalating threat of Antimicrobial Resistance (AMR). A critical intersection of these challenges lies in the clinical and public misidentification of viral rashes as bacterial skin infections, a phenomenon that drives inappropriate antibiotic consumption. With the Ministry of Health and Family Welfare (MoHFW) launching the National Action Plan on Antimicrobial Resistance (NAP-AMR) 2.0 in late 2025, there is an urgent need to understand the grassroots level of health literacy regarding these conditions. This study employs a cross-sectional observational design, utilizing a structured public awareness survey with a dataset of 444 respondents from diverse demographic backgrounds across India.1 The survey assessed the public's ability to differentiate viral exanthems from bacterial pyodermas and evaluated self-medication practices. These findings were triangulated with secondary clinical data from a tertiary care dermatology setting to correlate public perception with prescribing realities. The analysis reveals a profound deficit in diagnostic literacy. Only 18.4% of respondents could correctly identify the viral etiology of vesicular rashes typical of HFMD, while a significant majority (61.9%) admitted to using antibiotics for undiagnosed febrile illnesses.1 Clinical data indicates that while dermatologists largely adhere to WHO AWaRe protocols (69.5% Access group prescriptions), the demand for "quick cures" in the community fuels the misuse of "Watch" group antibiotics like Azithromycin.
Бесплатно
Ravines floristic diversity of Khinna gorge (Zayamchay river basin, Lesser Caucasus)
Статья научная
In 2016-2021 the ravines floristic diversity of the Khinna gorge (Zayamchay river basin, Lesser Caucasus) was studied. Khinna gorge is located on the right bank of the Zayamchay river, at the foot of Gizilja Mount. In the ravines of the Khinna gorge, 18 species, 13 genera and 11 families of plants were found. Plants of relict origin were also found: Poa nemoralis L., Poa compressa L., Ulmus glabra Huds., Parietaria chersonensis (Lang & Szov.) Dörfl., Asparagus verticillatus L., Gladiolus atroviolaceus Boiss., Rubus buschii Grossh. ex Sinkova, Amoria tumens (Steven ex M. Bieb.) Roskov, Plantago major L.
Бесплатно
Reforms in the railway system during the Second World War
Статья научная
The first railway lines in the Surkhandarya oasis, the influence of railways on the cotton industry, the start of new electric locomotives in order to bring raw materials to the center as quickly as possible, and the industrial enterprises moved to the region during the Second World War were covered based on scientific literature and archival materials.
Бесплатно
Статья научная
The article presents statistically significant regression models ( R 2corr>0,9; Fcr>>100; response function - life expectancy). The analysis of the abnormal observations in the baseline information has been carried out according to an original approach
Бесплатно
Статья научная
Feed plants are dynamically utilized by humans. This leads to a decreasing supply of feed plants. Also, considering that feed plants are eaten by animals, it can be observed that the decrease in the supply of these crops is inevitable. For this purpose, we studied the rare species of feed plants in the vegetation of Gunnut-Kapychik physiographic area where we conducted our research. The list of rare species distributed in the area is given by determining the distribution of feed plants in the area by altitudinal belts. Along with internationally recognized categories for determining the status of some important species, rare and endangered in nature, their relationship with the biome is also recorded. First of all, its past and present state in nature, its limiting factors are clarified and included in one of the relevant categories.
Бесплатно
