Life Sciences Commons^™

Mathematical Model Of The Efficiency Of Investments Aimed In The Implementation Of Water-Saving Technologies

Irrigation and Melioration

In Uzbekistan, research work is being carried out aimed at improving the economic mechanisms for the introduction of water-saving technologies for irrigating agricultural crops. At the same time, the issues related to the analysis of the effectiveness of the use of water-saving technologies when irrigating cotton, the development of mathematical methods for assessing the effectiveness of investments, as well as their introduction into practice have not been sufficiently studied. This article provides a mathematical model of the efficiency of investments aimed at introducing water-saving technologies. The results of a numerical experiment of a mathematical model show that the introduction of …

Efficient Use Of Water Resources In The Basins Of Small Rivers, F. Gapparov, M.F. Gafforova

Irrigation and Melioration

The article provides a recommendation for the efficient use of water resources in the basins of small foothill rivers. The research was carried out on the example of the Govasay river basin located in the northern part of the Fergana Valley. The efficiency factor of the canal has been determined and a technical assessment has been given for the management of water resources in the river basin; the efficiency of the canal is 65-75%. A program for the operational management of water resources in The Govasay river basin and a GIS map of water consumers in the Govasay river basin …

Model Of Groundwater Level Control Using Horizontal Drainage, A. Arifjanov, M. Otaxonov, Z. Abdulkhaev

Irrigation and Melioration

The article describes the main factors affecting the rise in the level of groundwater in the city of Fergana and ways to eliminate them. Currently, in order to reduce the negative impact of rising groundwater levels on the environment, crops, buildings and structures, as well as underground utilities, it is proposed to design horizontal drainage in urban areas and a mathematical model has been developed for changing the groundwater level. For this, long-term data from observation wells were analyzed and the hydraulic parameters of horizontal drainage were selected taking into account the hydrogeology of the area. Taking into account the …

Results Of Proximate Analysis Of Energy Use Of Municipal Solid Waste, N.N. Abduganiev

Irrigation and Melioration

In the modern industrialized world, various raw materials are processed and used for human consumption. While some of the raw materials are converted into the desired product, the rest is thrown into the environment as waste. It is known that solid waste is a type of biomass that is formed in the course of human life. The article presents the results of a preliminary analysis of studies on the use of solid waste energy in the Urta-Chirchik district of the Tashkent region. Sorting results showed that the total volume of municipal solid waste in the district consists mainly of wood …

Shredding Of Cotton Stalks Under The Action Of Toothpicks In A Combined Unit, B. Khudayarov, U. Kuziev, B. Sarimsakov, М. Kholbutaev

Irrigation and Melioration

The article presents materials devoted to the justification of the parameters of the crown-wheel of the combined aggreagate. The technological process of work and the design of the working part, which is crushed by crushing cotton stalks, without breaking them, laying them on the movement of the unit, has been substantiated and developed. The optimal parameters of the crown-wheel and the tooth are determined by solving the regression equations that determine the optimal values of the vertical load on the teeth and its working quality. The results of theoretical and experimental research show that the amount of crushing of cotton …

Influence Of Electrophysical Methods On The Processes Of Root Formation Of Grapes, N.M. Markayev

Irrigation and Melioration

The article describes the possibilities of electrophysical processing before planting cuttings during vegetative cultivation of grape seedlings. The processes of root formation in cuttings using the electrophysical method in the article Acceleration of the process of root formation in cuttings of black raisins, treated at 71 V/m and an electric field strength of 15 hours, and an increase in the viability, quality, growth and survival of rooted seedlings up to 16.67-34% Presented the results of experiments on the increase and methods of electrotechnological processing of grape cuttings. The result of the study is the analysis and results of the processes …

Conditions, Criteria And Principles For Creating An Agri-Cultural Land Market In Uzbekistan, A.R. Nurnazarov

Irrigation and Melioration

The article analyzes the prerequisites for creating a market for agricultural land in the Republic of Uzbekistan, special attention is paid to land reform, land degradation (reduction of the bonitet score from 60 in 1991 to 50 or more at present, pasture degradation by 20-30%) and increase in economic from their use, the role of land rent in payments for land. 6 basic principles for creating a land market have been established and systematized, the relationship between X-rays and water in the irrigated farming zone, the role of the market in increasing the efficiency and effectiveness of the use of …

Economic Assessment Of The Effect Of Family Income On Students' Disciplines, Sh.A. Muratov

Irrigation and Melioration

The importance of higher education in scientific research, its role in poverty reduction and population growth has been studied theoretically. Also, when using the data of social surveys conducted by 538 respondents (students) studying in higher education institutions, they were awarded the Order of the logistics regulator in the economic assessment of the factors influencing the rate of mastery of disciplines. Factors influencing the acquisition of subjects by students: the main income of the family comes from non-farm (69,9 %), sex (52,2 %), studying at a higher education institution on a state grant (108,8 %), the student's course of study …

Innovative Rotor Casing And Leveling Apron For Combined Tillage Machine, A.A. Akhmetov, L.B. Muratov

Irrigation and Melioration

Investigations of the design of a combined machine equipped with an innovative casing and a leveler apron are presented, and the parameters of the leveler apron are substantiated. It was experimentally established that when the height of the drawing prism is exceeded by more than 200 mm, due to the falling of the crumbling part of the soil onto the rotor, the soil is thrown forward in the direction of the machine. Therefore, to eliminate soil waste, it is necessary either to reduce the height of the drag prism, or to increase the distance between the rotor and the leveling …

Ensuring The Uniformity Of Movement Of The Working Bodies Of The Machine For Processing Ridges In The Depth Of Travel, А. Tukhtakuziev, K.G. Abdulkhaev

Irrigation and Melioration

The article theoretically investigates the issue of identifying ways to ensure the deepening of the working bodies of the machine for processing ridges to a given processing depth and its required uniformity of stroke. The research results show that the deepening of the working bodies of the ridges processing machine to a given processing depth and its required uniformity is provided mainly due to the correct choice of the vertical distance from its reference plane to the lower connection points. The novelty of the conducted research lies in the fact that an analytical dependence has been obtained that allows us …

Develepment Of Land Market In Eastern European Countries And Experience For Uzbekistan, A.R. Nurnazarov

Irrigation and Melioration

The article examines the experience of the formation of the agricultural land market in Eastern European countries since the 90 s of the twentieth century, the problems and features of its devel-opment, the impact of the land market on the economies of countries. Particular attention is paid to the transformation of land ownership, methods of land privatization, land pricing, restrictions on land purchase, regulation of land relations in market conditions, issues of granting the right to pur-chase land to foreign individuals and legal entities, requirements for land owners for the presence of a special agricultural education or 3-5 years of …

The Developmet Of Competences Via Techniques For Enhancing Esp (English For Specific Purposes) Vocabulary Of Learners, G. Eshchanova

Irrigation and Melioration

In the article a recent trend in higher education is ESP (English for Specific Purposes) courses is discussed. These courses are designed around students’ needs based on their field of study. The goal is to strengthen students’ proficiency and help them to get ready to cope with everyday situations and deal with professionals in many fields such as: engineering, medicine, education and IT. There are many training sessions organized by international experts whose goal is to train local teachers to teach these courses successfully. In order to develop an ability to learn new vocabulary, for both general English and technical …

Development Of Girls’ Sports, A.R. Khodjanov, V.V. Mahmudov

Irrigation and Melioration

The article addresses current issues of higher education, taking into account its specifics. She has been providing appropriate advice on improving girls' physical well-being. The use of opportunities and qualities has an impact on the creation of comfortable conditions for female athletes. For girls involved in sports, the creation of impressive quality and possible conditions is considered. As a result, the girls-athletes of our institute took 2-3 places in the district and city qualifying rounds of chess, table tennis and won a ticket to the republican stage. At the republican stage, 2 female students of our team took 4th place …

The Imrovement Of Esp Teaching Via Methodical Provision At Technical Institution: Specializm-Oriented English Via Agriculture, G. Eshchanova, U. Nullaev

Irrigation and Melioration

In the given article the ways that ESP combines subject matter and English language teaching is discussed. This approach can be highly motivating for students because students are able to apply what they learn in their English classes to their main field of study, whether it be law, computing, business, tourism, etc. Being able to use the vocabulary and structures that they learn in a meaningful context reinforces what is taught and increases their motivation. Nevertheless, ESP concentrates more on language in context than on teaching grammar and language structures. Additionally, the ways of teaching English in ESL classes and …

Inspection Electrical And Heat Parameters Of Photovoltaic-Thermal Battery, Studying The Effects Of Pollution, Umirbek Begmatovich Abdiev, Boysori Abdikholikovich Yuldoshov

Scientific reports of Bukhara State University

Introduction. The article discusses increasing the intensity of light incident on the surface of a photovoltaic battery (PVB) based on semiconductor solar battery, methods of cooling the PVB and protecting the surface from contamination have been investigated. To do this, the PVB is the planes that reflect light to the long sides, and a polycarbonate collector with a parallel channel on the back, this device looks like a photovoltaic-thermal battery (PVT). The article presents the results of the study of electrical and thermal parameters of PVT when changing (increasing) the intensity of solar radiation using reflective planes and cooling by …

Consolidation Of Mobile Sands With Ameliorants And Phytomelioration, Sharibay Toremuratov, Bakhtiyar Ismailov

Karakalpak Scientific Journal

The results of even a few experiments show the possibility of obtaining a tangible effect when jointly carrying out chemical reclamation and phytomelioration. Reliable habitation of plants is a guarantee of further long-term stopping of the movement of sand and improvement of the ecological situation.

Thus, the sand-fixing crust obtained by this method simultaneously performs several functions: it stops the movement of sand, reduces dust removal, creates favorable conditions for the growth and development of vegetation, contributes to the emergence of soil structures, the accumulation of humus, etc.

Graduation Of Antidepressant Assortment By The Method Of Expert Evaluations On The Pharmaceutical Market Of The Republic Of Uzbekistan, Abror Rahimov

Problems and Perspectives in Pharmaceutics and Drug Discovery

In the condition of the pharmaceutical market of Uzbekistan, for the first time, we carried an expert evaluation of the nomenclature of antidepressant drugs, considering the competence of experts and the representativeness of respondents of the studied group of drugs. Marketing research was carried out to study the opinions of psychiatrists from Tashkent city for two months: September – October 2020. As a tool for measuring the opinions of experts, an expert survey questionnaire was developed in advance with specified criteria. The study of antidepressants used in domestic conditions was carried out under the international non-proprietary name (INN). Also, based …

Justification Of The Main Parameters And Operating Modes Of The Crushers-Shredders Of Coarse Feed, K.D. Astanakulov, F.U. Karshiev, Sh.Kh. Gapparov

Irrigation and Melioration

The article presents the results of research on the justification of the parameters of the working bodies and operating modes of the mini crushers-shredders of coarse feed. On the basis of experimental research to study the effect of the rotor parameters Mini Crusher its qualitative performance indicators. According to the teachings found that rational parametres and operating modes-Crusher are: rotor length 350 mm; rotor diameter 550 mm; rotor speed 1290 min-1; the number of hammers 20 pcs; angle of rotation of the hammers 60.

Plan Dimensions Of The Flow Confinited By Cross Dams, On Rivers With Non-Symmetric Flooring, M.R. Bakiev, U.A. Kahhorov, A.А. Jakhonov

Irrigation and Melioration

Improving methods and technologies for calculating and designing floodplain transverse dams, taking into account the interaction of floodplain and riverbed flows to protect the banks from erosion and regulate riverbeds is one of the most important tasks. At the same time, the priority remains the transverse blind dams made of local soil with the attachment of their head. Their construction on rivers with two-sided asymmetric floodplains has its own characteristics, which consist in the need to take into account the morphology, the different roughness of the floodplain and the channel, the interaction of floodplain and channel flows, the asymmetry of …

Study Of Performance Of Vertical Drainage Well Construction From Polymer Materials, I.A. Akhmedov, Z.K. Mirkhasilova

Irrigation and Melioration

The article is devoted to the reconstruction and construction of vertical drainage wells. The use of vertical drainage wells is characterized by a decrease in the level of groundwater. The article presents data and typical regions of the use of vertical drainage wells.Also presented are mechanical, physical and chemical methods of well cleaning in practice. The information on the design and construction of vertical drainage wells is described. The analysis of corrosion resistance of vertical drainage well materials and their service life has been carried out. It is known that polymeric materials are resistant to corrosive environments. Using filters made …

Results Of Software Modeling Flow Section Of Vane Pumps, О.Я. Гловацкий, R.R. Ergashev, A.A. Abdullaev, J.I. Rashidov

Irrigation and Melioration

The article presents an analysis of data on the flow movement in a centrifugal pump, the results of which are aimed at improving the pump design in the direction of ensuring the flow of the flow without resistance to achieve energy savings in water transmission. To reduce slip on the pumps and to reduce the resistance to current flowing inside the pump to achieve energy savings, working impeller and spiral chamber shape are designed to be constructively correct. Data from pumping stations show that the performance of pumping equipment reduces water consumption by 10-12%, pressure by 18-20% and service life …

Economic Assessment Of A New Energy-Saving Electrical Technology For The Anesthesia Of Silkworms, O.A. Khaliknazarov, A.A. Turdiboev, D.M. Akbarov, D.M. Akbarov

Irrigation and Melioration

The article provides information on the role of Uzbekistan in the world in the field of cocoons, the analysis of cocoon cultivation and primary processing technologies, technologies and technical devices currently used in primary cocoon processing. Suggestion of the use of ultra-high frequency (UV) electromagnetic field in the anesthesia of mulberry silkworm, technical specifications of the electrotechnical device for anesthesia of mulberry silkworm using ultra-high frequency (UV) electromagnetic field, and the implementation of this device SK-150K pilons The cost-effectiveness of the device was assessed, the cost-effective method achieved as a result of the research work is highlighted. According to the …

Main Directions Of Food Security In Uzbekistan (The Case Of Samarkand Province), F.J. Saydullaeva

Irrigation and Melioration

The article assesses food availability as one of the indicators of food security on the example of Samarkand region based on a comparative analysis of the state of agricultural food production over the years and the volume of products per capita and their compliance with established recommended consumption norms. Based on the analysis, the results show that in Samarkand region in 2016-2020, agricultural food products were produced over recommended consumption norms per capita. The periodic evolution of the types of agri-food products produced by dehkan farms and owners of household land increased by 7.1% decreased by 7.3% on private farmers. …

The Economic Assessment Of Factors Affecting Small Household(Tomorka) In Rural Areas And Their Income, Sh.A. Muratov

Irrigation and Melioration

In this research, the role and importance of income from small householding(tomorka) in rural areas, its specific features are analyzed. Economic factors were assessed through the tobit regression model of the factors influencing the formation of income from small households (tomorka) activities, and VIF (Variance inflation factor) test was conducted to determine their multicollinearity. Anonymous surveys of 170 landowners in 4 districts of Samarkand region have been used in the analysis. The age of landowners, the area of arable land, the consumption of organic and mineral fertilizers, the cost of seeds and seedlings, the cost of preparing the field for …

Methodology For Solving The Radiation Problem Proposed By Planck In Physics On The Basis Of The Principle Of Consistency, Raygul Khozhanazarova

Karakalpak Scientific Journal

1. www.quantumphysics.iop.org
2. М. Planck. Verhandl. Dtsch. phys. Ges., 1900, 2, 237-245. М. Planck. Ann. Phys., 1901, 4, 553-563.
3. M. Planck, Zur Theorie des Gesetzes der Energieverteilung im Normalspektrum, ibid., 237-245 (1900)/
4. M. Planck. Uber des Gesetz der Energieverteilung im Normalspektrum, Ann. d.Phys. 4, 553—563 (1901).
5. Maks Plank. 1858-1958: Sb. k stoletiyu so dnya rozhdeniya Maksa Planka / Pod red. A. F. Ioffe i A. T. Grigor'yana. M.: Izd-vo AN SSSR, 1958. 276 p.
6. L. Boltzmann. Populare Schriften. Leipzig 1905, p. 227.
7. M.Plank. Vvedeniye v teoreticheskuyu fiziku. Chast' pyataya. Teoriya teploty. Ob"yedinennoye nauchno-tekhnicheskoye izdatel'stvo NKTP SSSR. Glavnaya redaktsiya obshchetekhnicheskoy literatury i nomografii. …

Research Of The Efficiency Of The Solar Battery Operations In Real Exploitation Conditions, Umarbay Omanovich Odamov, Mirziyo Mirkamilovich Kamilov, Shavki Kulaganovich Niyazov, Kihyun Song

Scientific reports of Bukhara State University

Introduction. Nowadays, there is a constant growth of the demand for the use of solar power plants and obtaining green energy. In the using process of them in real conditions, a decrease in efficiency is observed. Because of the influence of external and internal factors on solar cells, the Coefficient of Efficiency(COE) panels decreases. The study of these influencing factors today is one of the actual problems. In this work is presented a study of the efficiency of a solar battery in real operating conditions. Research methods. By using an electronic counter DTS-541U№530230, the output parameters of solar cells were …

Generalization Of The Hardy Class For Analytic Functions, Behzod Husenov

Scientific reports of Bukhara State University

Introduction. Quoting from a well-known American mathematician Lipman Bers [1] “It would be tempting to rewrite history and to claim that quasiconformal transformations have been discovered in connection with gas-dynamical problems. As a matter of fact, however, the concept of quasiconformality was arrived at by Grotzsch [2] and Ahlfors [3] from the point of view of function theory”. The present work is devoted to the theory of analytic solutions of the Beltrami equation which directly related to the quasi-conformal mappings. The function is, in general, assumed to be measurable with almost everywhere in the domain under consideration. Solutions of equation …

Intuition And Synergetics In The World Of Mathematics, Zoyira Payanovna Nadirova

Scientific reports of Bukhara State University

Introduction.Today, the development of science, the need to develop a culture of philosophical thinking require further expansion and strengthening of human knowledge, a comprehensive study of events and phenomena taking place in the world, the formation of scientific knowledge about the future of humanity on this basis, as well as the formation of a new approach to the problem of scientific creativity. This, in turn, determines the need for a scientific and philosophical study of the mechanisms of scientific creativity, i.e. intuition, a theoretical justification of its place in scientific knowledge. The Head of State noted that today, looking back …

The Role Of Yantak “Alhagi” Species In The Biological Diversity Of The Deserts Of Uzbekistan, Khudargan Mavlonov, Surayyo Kodirova

Mental Enlightenment Scientific-Methodological Journal

This article provides information on the occurrence, importance, role of Alhagi species in biodiversity (phytocenosis), eco-biological features, allelopathy.

About The Minkowski Difference Of Squares On A Plane, Jalolkhon Tursunboy Ugli Nuritdinov

Scientific reports of Bukhara State University

Introduction. As you know, the concept of a set is a basic concept in mathematics, and many mathematical problems have been solved using the theory developed around it. Building a set theory apparatus begins with defining the operations that can be performed on sets. Most of us know about operations on sets, such as joining, intersecting, subtracting, symmetric subtraction, and we also have an understanding of the practical problems they can solve. With the development of mathematics, including the science of geometry, the idea of adding other operations to the sets in addition to the above operations arose, and there …