Rheological Characteristics of Loam Compositions with Mineral Additives of Different Genesis and Morfology

Structural clay products manufacturing is depends on the potential of local raw materials. Shoddy silty loams are the main component of molding mixtures in view of shortage of the quality clays. Therefore, methods for determining the structural characteristics of molding compounds are becoming important. The objective of study is the influence of mineral additives different genesis and morphology at structural characteristics and molding properties of the compounds based on shoddy silty loams. Photometrical sedimentometer FSH-6K and optical microscopy method were used for the determining of granulometric compositions and morphological properties of the additives. Conical rheometer method was used for the determining plastic strength of the moulding compounds. Shear plastometer method was used to determining values of the low elastic, high elastic and plastic deformations. It had defined the optimal values of molding clay compound’s moisture in which molding compositions had being tested. Optimal values of the molding composition’s moisture in which molding compounds has not subjected to negative influences of the gravitational water are equal to 15-19%. Structural constants were calculated for molding compositions based on different kinds of additives. Values of the percent of low elastic, high elastic and plastic deformation were calculated on the grounds of rheological curves. Optimal values of composition’s structural characteristics were accepted from the condition of three types of deformations

First student conference!

The article presents a report on the I All-Russian scientific and practical conference of young scientists with international participation “Current issues of physical education of youth and student sports”, held on April 15, 2022 at the Yelets State University named after I. A. Bunin

Cosmic ray modulation in a random anisotropic magnetic field

Inhomogeneities of the interplanetary magnetic field can be divided into small scale and large scale ones as may be required by the character of the problem of cosmic ray (CR) propagation. CR propagation in stochastic magnetic fields is of diffusion character. The main contribution into the scattering of CR particles is made by their interaction with inhomogeneities of the magnetic field H which have characteristic dimensions 1 of the order of Larmor radius R=cp/eH of particle (p is the absolute value of particle momentum, e is particle charge, c is velocity of light). Scattering of particles on such inhomogeneities leads to their diffusion mostly along a magnetic field with characteristic dimensions of variation in space exceeding the mean free path

Photoluminescence from NV− centres in 5 nm detonation nanodiamonds: Identification and high sensitivity to magnetic field

This is the final version. Available from the publisher via the DOI in this record.The content of nitrogen-vacancy (NV−) colour centres in the nanodiamonds (DNDs) produced during the detonation of nitrogen-containing explosives was found to be 1.1 ± 0.3 ppm. This value is impressive for nanodiamonds of size < 10 nm with intentionally created NV− centres. The concentration was estimated from the electron paramagnetic resonance as determined from the integrated intensity of the g = 4.27 line. This line is related with “forbidden” ∆ms = 2 transitions between the Zeeman levels of a NV− centre’s ground triplet state. Confocal fluorescence microscopy enables detection of the red photoluminescence (PL) of the NV− colour centres in nanoscale DND aggregates formed from the 5-nm nanoparticles. Subwavelength emitters consisting of NV− with sizes a few times smaller than the diffraction-limited spot are clearly distinguished. We have further observed an abrupt drop in the PL intensity when mixing and anti-crossing of the ground and excited states spin levels in NV− occurs under an applied external magnetic field. This effect is a unique quantum feature of NV− centres, which cannot be observed for other visible domain light-emitting colour centres in a diamond lattice.Engineering and Physical Sciences Research Council (EPSRC

Anomalous cyclotron mass dependence on the magnetic field and Berry’s phase in (Cd₁-x-γZnxMnγ)₃As₂ solid solutions

Shubnikov-de Haas (SdH) effect and magnetoresistance measurements of single crystals of diluted II-V magnetic semiconductors (Cd₁-x-γZnxMnγ)₃As₂ (x+γ= 0.4, y=0.04 and 0.08) are investigated in the temperature range T=4.2 ÷ 300 K and in transverse magnetic field B=0 ÷ 25

Magnetoresistance and Anomalous Hall Effect of InSb Doped with Mn

Transport properties of polycrystalline (In, Mn)Sb samples are investigated. Behavior of the temperature and magnetic field dependencies of the resistivity, anomalous Hall coefficient and magnetoresistivity at low temperatures points out the influence of Mn complexes, Mn ions and nano- and microsizes MnSb precipitates on charge transport. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3361

STUDY THE POSSIBILITY OF MODELING OF THE CUTTING PROCESS IN THE CHAMBER FOR CRUSHING FRUIT AND VEGETABLES

The grinding process of fruits and vegetables in the preparation of juice with pulp, usually carried out by means juicers, blenders or grinders with a relatively slowly rotating blades and stationary gratings with a continuous flow of raw materials. Intensification of processes of division of the products of the conversion will asunder allow sharply duration and raise the uniformity of the processing cheese that will say on quality ready drink as a whole. The interaction of the blade and material is characterized effort of the cutting moreover the general power, acting on blade on the part of material, is not found in planes of the cutting in consequence of which on blade of the knife, alongside with vertical, acts and horizontal forming power. Horizontal form to deform (change) sidebar cut-ting edge of the knife in consequence of which in general event provision to necessary acerbity in flat material requires increase of his(its) thickness and using the additional relationships (the jumper). It is installed that values of magnitude of deformation and speed of its extending are connected among themselves through the parameters characterizing pressure and plasticity of medium of installation of machining. Hence, speed depends on properties of a body in which the pulse is passed round. In the majority of materials speed of extending of a pulse appears an order of 5 103 km/s. Accounting of received data in the determination of rational cutting speeds for different materials with elastoplastic properties (approximation cutting speed for the propagation velocity of deformation) will allow to reduce pre-separation deformation and, respectively, spent on her work, localization stress under cutting edge, and, as consequence will lead to higher product yield and improve the purity of the slices. Improving the quality cutting may be associated with an increase of inertia of the structural elements of the material (fibers) by increasing the speed of the process