bluuebunny/crossref_metadata_2025_split huggingface dataset:
Probing dark matter interactions with 21cm observations
Authors: Mosbech Markus R. , Boehm Celine , Wong Yvonne Y.Y. 
Published: March 2023

Abstract
Similarly to warm dark matter which features a cut-off in the matter power spectrum due to
free-streaming, many interacting dark matter models predict a suppression of the matter power
spectrum on small length scales through collisional damping. Forecasts for 21cm line intensity
mapping have shown that an instrument like the SKA will be able to probe a suppression of power in
warm dark matter scenarios in a statistically significant way. Here we investigate the
implications of these findings on interacting dark matter scenarios, particularly dark
matter-neutrino interactions, which we use as an example. Using a suite of cosmological N-body
simulations, we demonstrate that interacting scenarios show a suppression of the non-linear power
spectrum similar to warm dark matter models. This implies that 21cm line intensity mapping will
be able to set the strongest limits yet on dark matter-neutrino scattering, improving the
constraints by two orders of magnitude over current Lyman-α bounds, and by four orders of
magnitude over cosmic microwave background and baryon acoustic oscillations limits. However, to
distinguish between warm dark matter and interacting scenarios, our simulations show that
percent-level precision measurements of the matter power spectrum at redshifts z ≳ 15 are
necessary, as the key features of interacting scenarios are washed out by non-linear evolution at
later times.
Optical recursional binormal optical visco Landau–Lifshitz electromagnetic optical density
Authors: Körpinar Talat , Körpinar Zeliha 
Published: March 2023

Abstract
In this manuscript, we study a new version of the optical recursional binormal microbeam model for a flexible binormal microscale beam in terms of a binormal normalized operator. Also, we give new explanations for the optical recursional visco Landau–Lifshitz binormal electromagnetic binormal microscale beam. Finally, we obtain an optical application for the normalized visco Landau–Lifshitz electromagnetic binormal optimistic density with an optical binormal resonator.
Simple scenario of integrated neutron-proton interaction*
Authors: Yin Xin , Zhao Yumin 
Published: March 2023

Abstract
In this study, we investigate the patterns exhibited by integrated neutron-proton interactions (denoted as

) that exhibit systematic differences among particle-particle, hole-hole, hole-particle, and particle-hole cases. A simple formula of

is proposed to be in approximate linearity with

. This formula yields regular patterns of

that are highly consistent with those previously extracted according to binding energies. The observed ordering of

, i.e.,

of the particle-particle case is the largest,

of the hole-hole case is in-between, and

of the particle-hole and hole-particle cases is the smallest, is explained in terms of the dominant part of

originating from symmetry energy and refinement involving the shell correction in the mass formulas.
Cosmic time evolution and propagator from a Yang–Mills matrix model
Authors: Karczmarek Joanna L , Steinacker Harold C 
Published: March 2023

Abstract
We consider a solution of a IKKT-type matrix model which can be considered as a 1+1-dimensional space-time with Minkowski signature and a Big Bounce (BB)-like singularity. A suitable

i
ε

regularization of the Lorentzian matrix integral is proposed, which leads to the standard

i
ε

-prescription for the effective field theory. In particular, the Feynman propagator is recovered locally for late times. This demonstrates that a causal structure and time evolution can emerge in the matrix model, even on non-trivial geometries. We also consider the propagation of modes through the BB, and observe an interesting correlation between the post-BB and pre-BB sheets, which reflects the structure of the brane in target space.
A consistent quantum field theory from dimensional reduction
Authors: Maiezza Alessio , Carlos Vasquez Juan 
Published: March 2023

Abstract
We incorporate the concept of dimensional reduction at high energies within the perturbative formulation of quantum field theory (QFT). In this new framework, space and momentum integrations are modified by a weighting function incorporating an effective mass energy associated with the dimensional reduction scale. We quantize the theory within canonical formalism. We then show that it can be made finite in perturbation theory, free of renormalon ambiguities, and with better analytic behavior for infinitesimal coupling constant compared to standard QFT. The new approach reproduces the known results at low energies. One key feature of this class of models is that the coupling constant always reaches a fixed point in the ultraviolet (UV) region, making the models UV complete.
Investigation of the cleaning the air flow process from aerosol particles in the electric fields of the corona discharge’s streamer form
Authors: Muzafarov Sh M , Balitsky V E , Togaev B K , Babayev A G , Kilichov O G 
Published: March 2023

Abstract
This article presents the methodology and results of experimental studies of the parameters of the electrode system “Potential plane with corona needles - grounded plane”. The parameters of the electrode system were determined for a distance between the electrodes of 0.15 m. The parameters of the electrode system determined on the basis of these studies were verified on the basis of experimental studies of the process of trapping dust particles from an air stream. The methodology and analysis of the results of these studies are given. Based on these studies, the best ratios of the parameters of the electrode system were determined according to the highest degree of purification of the cleaned air. The difference in the distances between the needles in a row located perpendicular to the flow of the cleaned air and between the rows of needles is determined.
Measuring systems in technologies of automated humidity control
Authors: Kalandarov P , Olimov O 
Published: March 2023

Abstract
This paper examines intelligent humidity sensors (transducers) as a component of an automated process control system that converts a controlled physical quantity into a measured signal for further processing in an automatic device, as well as mathematical models of intelligent support for bulk material moisture meters. It is demonstrated that one method for increasing the efficiency of the functioning of quality meters for various bulk materials is the development of conceptual foundations and their practical implementation in the construction of express devices capable of measuring grain and grain materials. The interaction of intelligent support measuring tools in technologies for automated moisture control in technological processes and control is investigated. The microwave method is recommended for monitoring the moisture content of grain and grain materials, as well as their metrological characteristics.
Influence of the parameters of the impact of electrical impulses on the yield of juice from the pulp
Authors: Eshpulatov N , Khalmuradov T , Rakhimov F , Abdurayimov S , Khurramov A , Ruziyeva U , Normetov T , Maftuna I 
Published: March 2023

Abstract
This article presents the results of experimental studies to determine the effect of electrical impulse processing parameters on the output of juice from the pulp. It is based on the effect of pulse energy and voltage on apple juice. The influence of an electrical impulse on the production of juice before pressing fruit pulps has been studied. It is based on the optimal parameters of the grinding rate of the raw material, which affects the efficiency of processing with electric pulses. An additional large amount of juice was detected after the pulp was treated with electrical impulses. Based on the voltage dependence of the juice obtained from the raw material and the direct interaction of the field with the electrically charged system of the cell protoplasm.
Study on two-step ozone treatment of liquid effluents from livestock farms
Authors: Ibragimov M , Berdishev A S , Tadjibekova I E 
Published: March 2023

Abstract
Wastewater ozonation, for epidemic animal diseases, is an effective method. The disadvantage of this method is relatively high percentage of unreacted ozone (10-40%). This paper proposes a combined method of mixing ozone with liquid effluents: first - barbotage, and at the second stage - injection or mechanical emulsification. It was found that the two-stage treatment increases the mixing efficiency (respectively disinfection) to 88 - 90 %.
Improving automatic control of a solar heating system for increasing its efficiency
Authors: Anarbaev A , Kodirov D , Khushiev S , Izzatillaev J , Makhmudov Yu , Mamadjanov B , Shukuraliev A , Normuminov J 
Published: March 2023

Abstract
The control scheme for the operation of a solar circuit pump with a bypass and photovoltaic batteries during the period of solar insolation is considered. At the same time, optimal modes of functioning are provided by thermal processes in the heat supply system. Are shown results of experimental researches by energy efficiency for developed technical solutions.
Smart system for cavitation cause measurement and control in irrigation pump
Authors: Baratov R J , Chulliyev Ya E , Bon Thomas , Abdullayev M 
Published: March 2023

Abstract
The objective of this study is to develop an effective smart system for cavitation cause measurement and control in pump units. An analysis of the known sources of measurement and control of the cavitation shows that the known methods are based on the measurement of the effects of causing cavitation such as vibration, temperature and pressure changes in the pipeline. The proposed smart cavitation cause measurement and control system is based on converting water- air ratio to the electrical signal by means of capacitance sensor that has very low value. The electrical scheme of low capacitance measurement by means of modern microcontrollers, block diagram and algorithm of smart system for cavitation cause measurement were developed. The complete smart system for cavitation cause measurement and control by means of modern microcontrollers was implemented in hardware and conducted experiments. The theoretically and experimentally obtained capacitance and the water - air ratio relationship is presented. Based on experimental studies, the relative error of the measurement system was determined and its graph is submitted.
Analysis of the double-side power supply for electronic-ion technology devices with pulse voltage
Authors: Muzafarov Sh M , Balitsky V E , Togaev B K , Babayev A , Kilichov O 
Published: March 2023

Abstract
This article provides an analysis of existing high voltage power supply devices for devices of electron-ion technology, in particular devices for cleaning gases from aerosol particles. Advances in this technology are described. The following are the disadvantages of the electric fields of a corona discharge when powered by a constant high voltage. To increase the efficiency of catching aerosol particles, the authors propose to combine self-sustained and non-sustained discharges in one discharge gap. To do this, it is proposed to use unipolar high-voltage pulses with a constant component and pulses with a duty cycle of more than 5. An analysis is made of the possibility of increasing the efficiency of the impact of electric fields when using circuits with two-sided power supply, the analysis of which makes it possible to increase the pulse repetition rate, as well as to regulate the process of the impact of electric fields on processed particles., regulation by the parameter of impulse voltage.
Study on energy balance calculation of the electric network
Authors: Rakhmatov A , Aripov Kh 
Published: March 2023

Abstract
In this article, we developed the power balance of the power grid in the Sulkandariyo region and analyzed the main parameters of the grid in the context of the power grid enterprise in the region. Regional consumer load charts and substation 10, 35, 110 kV loads were investigated. Given the energy balance situation, recommendations for installing new generation capacity in this area have been proposed.
Study on the effective use of solar and hydro energy for powering agriculture and water management
Authors: Kodirov D , Muratov Kh , Davirov A , Normuminov J , Mamadjanov B , Shukuraliyev A , Berdiyorova I , Musayev Sh 
Published: March 2023

Abstract
This article highlights the combined use of solar and hydropower based on a rational combination of traditional and renewable energy sources for powering agriculture and water management. At the same time, a combined integrated power supply system was formed. Provided, the energy is required from renewable sources, it fully provides the consumer, and the excess energy is transferred to the centralized network (N″), if the energy received from the network is less than the energy entering the network, the recommended system is efficient (N′″).
Method for oxidative roasting of sulfide zinc concentrates in an air oxygen stream in fluidized bed furnaces
Authors: Berdiyarov B , Matkarimov S 
Published: March 2023

Abstract
An increase in the oxygen content in the blast to a concentration of 26-28% during the firing of zinc concentrates in the KS furnaces leads to a decrease in the formation of undesirable compounds of ferrites and zinc silicates, increases the degree of desulfurization, and shortens the firing time. At the same time, it becomes possible to load concentrate with high humidity into the furnace, which will save costs for drying the raw materials. Ultimately, it leads to an increase in the complexity of raw materials, increasing the profitability of production and making the products competitive in the world market. The article is considered questions of increased efficiency of processing collective zinc concentrates without their preliminary selective division. Our developments on the processing of collective zinc concentrates are directed to that in the maximum degree to receive sulfates of zinc transferring zinc to the solution. Thermodynamic calculations show that the formation of sulfates most intensively precedes in the range of 1000-1100 °C. It is offered to carry out roasting of a collective concentrate to furnaces of the boiling layer in the gas environment.
Study of regularities of structural-phase transformations during thermocyclic treatment of tool steels
Authors: Norkhudjaev F , Mukhamedov A , Djalolova S , Pardayeva G , Komilova G , Sung Kim Bum 
Published: March 2023

Abstract
Movement of carbon atoms to dislocations reduces the specific volume of the martensite phase, which, in turn, affects the general level of volumetric changes that occur as a result of phase transformations during quenching. The measurements carried out on samples of steel ShX15 showed that the minimum increase in geometric dimensions is observed. Intermediate tempering and re-quenching do not change this pattern. At the same temperature, for this steel grade, the minimum degree of martensite tetragonality was recorded. This study has shown that to obtain a high level of final properties of tool steel, the most optimal is to obtain a substructure with a high level of defectiveness of the crystal structure of steel. It was found that the use of thermal cycling treatment contributes to an increase in the level of defectiveness of the crystal structure. It was also found that the use of aqueous solutions of polymers as a quenching medium makes it possible to obtain a cooling rate less than in oil quenching, which helps to reduce the level of quenching stresses.
Study on reinforced concrete elements of buildings and structures with cracks, reinforced with composite polymer materials
Authors: Sagatov B 
Published: March 2023

Abstract
With the rapid development of modern construction practice around the world, serious problems arise in the application and subsequent operation of reinforced concrete structures. Today, the problem of reconstruction and restoration of buildings and structures requires an urgent solution. The deterioration of the environmental situation threatens the reliability of buildings and structures, a sharp deterioration in their condition is observed in almost all countries and climatic zones. In our case, the trend towards wear is developing due to the imperfection of regulatory documents and the need for proper maintenance of objects. The development of the construction industry and the use of innovative composite polymer materials in construction and the strengthening of existing buildings and structures with modern methods are relevant. Often very rare, expensive, historically significant structures require reliable operation, and their dismantling or replacement is more expensive than repair, or even impossible. Reinforcement of building structures using composite polymer materials (CPM) is by far the most “cautious” measure for their restoration and improvement of performance. In our research, the main attention is paid to the technology of external reinforcement of reinforced concrete beams using CFRP to increase their load-bearing capacity at shear. To reduce material consumption when strengthening the structure, it is more efficient to use CFRP in the form of strips, however, this practice has not been practically studied. Previous researchers have concentrated their attention mainly on external reinforcement, generally ignoring the effect of internal reinforcement. However, it is known that internal and external reinforcement complement each other and the destruction during shearing of reinforced concrete elements is mainly influenced by such factors as steel clamps, longitudinal reinforcement and the ratio of the shear span to the working height of the section. Therefore, in our studies, special attention was paid to considering the influence of these factors on the overall bearing capacity of beams. In addition, the work studied the ability to transfer shear stresses through cracks in reinforced concrete beams reinforced with external reinforcement from CFRP compared to the same unreinforced ones.
Effectiveness of cleaning of sunflower oil with filter material made from composition of organic and inorganic fibers
Authors: Egamberdiev E , Makhkamov A , Rakhimjonov B , Khusanov D , Akmalova G , Mirzakhmedova M , Rahmonberdiev G 
Published: March 2023

Abstract
In this study, the process of purification of sunflower oil per day using a filter material based on cellulose and inorganic fiber basalt fiber obtained from annual plants was studied. Studies have shown that sunflower oil obtained has improved a number of quality indicators. It was observed that the indicators such as transparency, color, acid number of the refined oil improved. Filtration is the process of separating solid particles from a liquid by passing a sufficiently thin and porous (fine-grained) barrier. The liquid passes through the pores, i.e. the capillaries of the filter material, and as the size of the suspended particles is larger than the capillary size, a precipitate forms on the surface of the fabric. Typically, this sediment itself has a major impact on the entire filtration process, as the material accumulates on the surface and serves as a self-filtering material.
Automated control system of drip irrigation and mathematical modeling
Authors: Kalandarov P , Kutlimurotov Zh , Eshchanova G , Mustafakulov A 
Published: March 2023

Abstract
In this article, the theoretical and methodological foundations for the use of an automated control system for drip irrigation of crops are considered. The analyzed system is automated through integration, which allows controlling the entire irrigation process through a control device with controllers, shows the main elements of the drip irrigation system that carry out complete controlling and the procedure for moistening the soil and fertilizing, presents a functional diagram of the automated system for regulating soil moisture, as well as pressure in the pipeline, mathematical modeling of water consumption of crops under drip and combined irrigation is considered, the influencing factors that require regulation, which will ensure the management of plant development are shown. The complexity of the simulated system “Plant-moisture-soil-atmosphere-solar radiation” and its subsystems are explained by a large number of interrelated factors of various nature and requires the construction of numerical schemes, computer simulation using various computer programs.
Obtaining of complex hydrogel fertilizers with moisture-retaining NPK based on local raw materials
Authors: Abduhakimov T , Sherkuziev D , Aripov X 
Published: March 2023

Abstract
This article presents the results of research on the production of fertilizers using water-saving hydrogel on the basis of local raw materials. The reaction of ParPAN raw materials with inorganic and organic acids and in the presence of formalin has been studied. According to the results of research, a new type of hydrogel was synthesized. The degree of swelling of the hydrogel has been found to be related to the amount of formalin and other additives. The composition of the hydrogel composition with mineral fertilizer was developed, its basic physico-chemical characteristics and swelling kinetics were studied. The use of hydrogels as a means of keeping moisture and feed components in arid and low-water agricultural regions of the Republic of Uzbekistan is recommended.
Study on the characteristics of water resources through electrical conductivity: A case study of Uzbekistan
Authors: Gapparov A , Isakova M 
Published: March 2023

Abstract
The article presents an analysis of the characteristics of water based on the electrical conductivity of samples taken from some water sources in the Tashkent region of our republic. By directly measuring the electrical conductivity of water, it is possible to make several conclusions about the presence of inorganic impurities. The conductivity of pure water is extremely low. For example, 18°C (at room temperature) is equal to 0.04*10−6 OM−1 cm−1. The reason for thinking about this is that among the methods used to determine the quality and physical-chemical parameters of water, electrical Conductivity-based methods are extremely sensitive and accurate. Water with high conductivity indicates impurity (rich in various ions).
Intensity of egg laying dynamics by butterflies in the first day of the caterpillar’s life’s period and their relationship with the silkworm selection characteristics
Authors: Khudjamatov S , Nasirillaev B , Rajabov N 
Published: March 2023

Abstract
The research is devoted to the study of the genetic parameters of a less studied trait - the intensity of egg laying on the first day of female silkworm butterflies. Based on genetic experiments conducted in promising lines Line 27 and Line 28, it was found that the variability of this trait is Cv = 15,0-15,3%, and the heritability coefficient h2 = 0,321-0,340. Also, for the first time, a close positive correlation was established between the intensity of egg laying on the first day and the leading reproductive signs. A close positive correlation (rp = 0,432-0,692) was found between the growth rate of caterpillars and their productivity reflected in the yield of cocoons. At the same time, it was found that fast-growing caterpillars are less susceptible to diseases.