OAK jurnallaridan yig‘ilgan 129907 ta ilmiy maqola: sarlavha, mualliflar, annotatsiya, kalit so‘zlar, DOI va tayyor iqtibos formatlari.
The article provides a forecast for the number of railcars, taking into account the development and maintenance personnel of railway transport, as well as an analysis of data for a quantitative assessment of reliability…
The method of detecting delayed neutrons (MDN) during uranium fission is the most convenient and promising methods for analyzing uranium ores. The availability of high intensity Cf252 and Sb-Be neutron sources and the…
The thermionic emission of polyatomic molecules of new psychotropic substances, narcotics,and psychotropic drugs used for non-medical purposes haves been studied on the surface ofoxidized tungsten using thermionic mass…
This study focuses on the evolution of intermolecular interactions in propionic acid (PrAc)-acetonitrile (ACN) mixtures, combining Raman spectroscopy, two-dimensional correlationspectroscopy (2D-COS), and quantum…
The formation and evolution of microheterogeneous structures in aqueous isopropanol solu-tions were investigated using dynamic light scattering. It is shown that correlated orientationalinteractions due to hydrogen…
The thermodynamic properties of a two-dimensional electron gas in half-filled Landau subbands have been analyzed. The study have carried out based on a Gaussian distribution of thedensity of states. Analytical formulas…
In recent years, interest in natural photosensitizers has increased, which is associated not onlywith their ability to effectively absorb light, photo-activity, biocompatibility and relatively lowtoxicity, but also with…
In the work, the optical properties and structural characteristics of TiO2 nanofilms deposited onJGS1 quartz substrates by ALD are investigated. The analysis was carried out for a series ofsamples fabricated with 750…
In the work, the behavior of C60 fullerene molecules in benzene and in a binary benzeneisopropyl alcohol (IPA) system was experimentally investigated using optical spectroscopy,IR-spectroscopy, and dynamic light…
The magnetic circular polarization of luminescence (MCPL) spectra of Na0,375Tb0,625F2,25 wereinvestigated in the visible spectral region. An intense luminescence band located in the wavelength range of 535–560 nm…
We present a systematic theoretical investigation of third-order nonlinear optical effects enhancement in spherical gold nanoparticles within the quasi-static approximation. The dielectric response of gold is described…
The structure, composition and some physico-chemical properties of the nanocomposite basedon the mixture of natural polyamide base and FeO filler were studied using elemental analysis,IR-spectroscopy, X-ray phase…
In combined processing methods, the influence of cavitation phenomena within the dischargechannel on dispersion efficiency remains insufficiently explored. This study utilizes a theoretical and computational approach…
The elemental composition of GaAs(O):Cr was determined using energy-dispersive spectroscopy and found to be: gallium 47.71 at.%, arsenic 44.37 at.%, chromium 0.10 at.%, and oxygen 7.82 at.%. The material was found to…
The spectral dependence of optical activity in bismuth silicate (Bi12SiO20) and bismuth germanate (Bi12GeO20) crystals was experimentally studied in the wavelength range of 488–1150nm. It was shown that the specific…
In the present article, the structure of magnetic domains and the mechanisms of their formationin the Fe5Ga6Gd2YZr crystal are examined. The processes of domain emergence, the regularities of their reconfiguration under…
In the work, the synthesis processes of graphene layers within polymer materials under theinfluence of high temperature and laser energy are investigated. During thermal stimulation,the carbonization and…
This study describes the morphological, optical, and photocatalytic properties of TiO2 nanostructures synthesized from FTO-coated glass plates. Studies have shown that TiO2 nanocrystals with diameters of 50-70 nm can be…
This paper presents a theoretical studying the effects of strain and compositional variations onthe linear and nonlinear optical properties of InP/InAs1-xPx/InP quantum wells. The Schrödinger equation was solved to…
This work presents a numerical investigation of second-harmonic generation (SHG) by ultrashort femtosecond laser pulses in nonlinear photonic crystals of gallium nitride (GaN) with periodically modulated second-order…
This article presents a compiled catalog of 408 galaxy groups. In the appentdix [1, 2] physicalparameters of 80 galaxy groups are provided as a sample. The number of galaxies in thegroups ranges from 5 to 30. Physical…
In the study, the physical parameters of open star clusters in Stock catalogue were analyzed.An inverse linear relationship between the color excess E(B–V) and the age of relatively youngclusters was found. A linear…
We investigated quasi-periodic pulsations (QPPs) in X-ray and extreme-ultraviolet (EUV)emissions during the X-class solar flare (SOL2022-03-30T). Two modes of quasi-periodic pulsations were detected. A longer…
The conducted experiments and theoretical analysis revealed that picosecond-durationNd:YAG laser irradiation induces highly complex thermal and hydrodynamic processes on thesurface of copper foil. Spectroscopic…
In the study, the performance and working mechanisms of memristors based on organicinorganichalide perovskite (OIHP) materials with two distinct configurations: ITO/PEDOT:PSS/Cs0.15MA0.15FA0.7Pb(I0.8Br0.2)3/InGa and…
In this work, carbon nanotubes were synthesized using the catalytic thermal chemical vapordeposition (CVD) method. A thin layer of Ni catalyst was deposited onto a Si substrate with aSiO2 buffer layer using the electron…
The study aims to address the problem of producing low-cost and high-quality metallic powderfrom Ti-6Al-4V alloy with morphological characteristics and particle size distribution thatmeet the requirements of additive…
In recent years, photodynamic therapy (PDT) has become an effective and minimally invasiveapproach for treating cancer and infectious diseases. However, conventional photosensitizers(PS) are limited by short absorption…
The composition and electronic structure of tungsten films with surface oxygen (O2) layerswere investigated using photoelectron and electron spectroscopy methods under ultra-high vacuumconditions. It was found that…
In the study, the diffusion of copper atoms in crystallized poly-germanium films deposited on aSiO2 substrate at a temperature of 550 K was investigated using secondary ion mass spectrometry(SIMS). The obtained mass…
The films Sb2(SxSe1-x)3 were studied by scanning electron microscopy of films grown at differentvapor pressures. Microcrystals in the films are evenly distributed over the surface of thesubstrate. The morphology of the…
In the study the effect of doping by boron (B) on the electrical properties of double-walledcarbon nanotubes (DWCNTs) at various temperatures (from 300 K to 1500 K was investigated.The introduction of boron atoms into…
In this paper, a new method for determining the density of defect states of amorphous semiconductorsis proposed. It is shown that if the experimental curve of the optical absorptionspectrum of an amorphous semiconductor…
A simulation study of a solar-transversely pumped Cr:Nd:YAG laser with Monte Carlo photontracing technique was conducted. The model was used to calculate the pump efficiency, pumpand temperature distributions, and…
This paper presents the results of a study on modeling and predicting the critical superconductingtemperature (Tc) of YBa2Cu3O7δ (YBCO) samples synthesized via the solid-state reactionmethod, using a multiparameter…
Non-adiabatic effects that manifest in the electrical properties of the positive parity states of182,184W nuclei are studied in the framework of a phenomenological model that takes into accountthe Coriolis mixing of…
This article examines the government measures implemented to ensure the financial stability of agricultural enterprises and highlights the general characteristics of modern analytical models used to assess their…
This article analyzes the theoretical, methodological and practical aspects of the sustainable and effective development of the agro-industrial complex in economic regions. The importance of the cluster approach in…
The article presents promising technologies for producing cast parts with wear-resistant coatings using the lostfoam casting process. The compositions and properties of steel powder coatings have been determined…
The article describes the results of experiments conducted on enlarged diameter saw spacers prepared for conducting experiments to improve the seed lintering process and lintering equipment, increase the productivity of…
The article analyzes the economic efficiency of optimizing the motor oil change interval in the D-243 diesel engine of an MTZ-82 tractor operated under hot climate conditions. Annual costs for three oil brands (M-10DM…
This article analyzes energy- and resource-saving technologies used in pre-sowing soil cultivation in agriculture, as well as the design features of harrows equipped with blade-shaped working bodies that implement these…
This article presents the design and operating principle of a combined machine developed for strip tillage of soil in rainfed agricultural fields and the simultaneous row sowing of chickpea seeds in accordance with…
This study investigates the kinematics of spindle drums based on a planetary-cam-linkage mechanism with elliptical trajectories. Analytical expressions were developed to determine the linear and angular velocities of…
This article presents the results of experimental studies of a loosener of a combined implement designed for the direct sowing of repeated crop seeds with minimum tillage on fields vacated after cereal harvesting…
This article analyzes the current state of qualitative accounting of irrigated agricultural lands using the examples of Jizzakh and Tashkent regions. The study considers the assessment of soil fertility, salinity…
The scientific foundations of restoring degraded irrigated lands in the Chimbay district of the Republic of Karakalpakstan, their phased introduction into agricultural circulation, and the development of…
The article presents the results of a study on the effectiveness of the application of potassium fertilizers at the rate of 100 kg ha-1 prepared from local raw materials in a background of nitrogen and phosphorus…
This article examines the composition of measures for regular maintenance of elements of a water-saving irrigation system. At the same time, the level of safety of the existing drip irrigation system elements was…
This article investigates the improvement of design parameters of drip irrigation systems used in greenhouse conditions, considering the hydraulic characteristics of water flow. The efficiency of the irrigation…