Features of formation and distribution of pearlite disperstion degree in C82D steel (EN ISO 16120-2:2017) billet and after its hot plastic deformation at different stages of rolling, were ...established. The structure is a lamellar pearlite with different degrees of dispersity, regardless of the technological area of samples selection. The interplate distance of pearlite increases and reaches the largest values in the center with the approach to the axial rolling zone. The hot plastic deformation should be completed at a controlled temperature of the metal output at the last stage of rolling. Here stage of water cooling was excluded what reduces the temperature gradient between the surface and the center rolling.
The stress–strain properties of polydicyclopentadiene synthesized by ring opening metathesis polymerization are studied depending on the absorbed dose and radiation type. The dependence of the ...ultimate strength on the absorbed dose has a complex nature. Signs of restoration of the ultimate strength of polydicyclopentadiene in the dose range from 0.4 and 0.7 MGy to the corresponding value of the unirradiated sample are revealed. The ultimate strength of the sample irradiated at a dose of 0.5 MGy is reduced by no more than 12% compared to the unirradiated sample. Other changes in the strength remain within 6.0–0.5%. Polydicyclopentadiene generally behaves as predominantly radiation-resistant. Regardless of the radiation type (electron beam or γ) and manufacturing method, polydicyclopentadiene has the ability to be crosslinked under irradiation. A hypothesis is proposed to explain processes occurring in the structure of the material.
Abstract
Among the many ways of representing and processing space information, polygonal ones are not so often found, although polygons, as geometric means of describing spatial information objects, ...are very common in wide internet content. In computer games, design, even in fine art and many other applications, the polygonal description of such objects is not only widely present, but also received from developers, both theory and practical implementation, a fairly wide set of mathematical and software tools. In this article, it is proposed to extend some well-proven developments in the analysis and transformation of computer images to real digitized satellite images, as well as to use combinations of satellite processing methods and polygonal methods which are characteristic for virtual reality conditions. In addition, the paper provides approaches for detecting hidden and being hidden artifacts – information bookmarks. The definitions of the main directions of intel-latency are given, as an important property of complex images of the Earth’s surface obtained during space monitoring of problem-oriented territories. A variant of the classification of the types of manifestation of this property is given, as well as its description in the language of soft models.
The results of experimentally obtained data on the change in the physicomechanical properties of a thermosetting polymer with a unique complex of technically valuable properties are considered and ...analyzed. In the study of mechanical properties, the dependence of the tensile strength of radio-modified polydicyclopentadiene synthesized by the PolyHIPE technology on the dose was revealed. A study of the modification of the physicomechanical properties of the polymer showed an inhomogeneity in the dependence of the voltage change on deformation, observed when the samples were irradiated by electrons in the entire range of doses, at 50 kGy, this effect is most clearly represented. A reduction in the strength limit by 42% was established for irradiation. The growth of tensile stress in the dose range from 20 to 40 kGy was determined experimentally to the value for the unirradiated sample. A graph of the strain-force dependency family is presented for irradiation with different doses, irradiation with a dose of 40 kGy, the curve characterizes the change in the deformation properties of the material, despite a general decrease in the strength characteristics of the material.
Ion-exchange membranes based on polymethylpentene and sulfonated polystyrene with different grafting degrees were obtained. Solvation and mobility of lithium ions depending on the composition of ...initial organic solvents were studied. The highest ionic conductivity at room temperature (30°C) are obtained for the membranes containing dimethylsulfoxide (σ = 1.31 × 10
–4
S/cm for membrane with
GD
= 78%). Membranes containing dimethylformamide are characterized by a constant phase composition in a broad temperature range and the highest ionic conductivity at low temperature (σ = 9 × 10
–6
S/cm at–20°C for a polymer with
GD
= 78%).
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The reasons of changes in the mobility of proton-containing groups (water molecules and hydrated protons, H2n + 1On+) of ion exchange membranes at various temperatures and water ...uptake are considered by an example of membranes based on polyethylene and grafted sulfonated polystyrene.
The CLAS Physics Database (CLAS DB) has been developed in collaboration between SINP at MSU and Hall B at Jefferson Lab. CLAS DB contains most experimental results on inclusive, semi-inclusive, and ...exclusive reactions on proton and nuclei obtained with the CLAS detector. The substantial part of these experimental results represents the only data sets available in the world. The results and analysis tools provided by the CLAS DB are of particular importance for studies of the structure of the ground and excited hadron states, offering insight into strong nonperturbative QCD dynamics, which underlie the generation of hadrons from quarks and gluons.
The status of DNA methylation in the human genome changes during the pathogenesis of common diseases and acts as a predictor of life expectancy. Therefore, it is of interest to investigate the ...methylation level of regulatory regions of genes responsible for general biological processes that are potentially significant for the development of age-associated diseases. Among them there are genes encoding proteins of DNA repair system, which are characterized by pleiotropic effects. Here, results of the targeted methylation analysis of two regions of the human genome (the promoter of the
MLH1
gene and the enhancer near the
ATM
gene) in different tissues of patients with carotid atherosclerosis are present. Analysis of the methylation profiles of studied genes in various tissues of the same individuals demonstrated marked differences between leukocytes and tissues of the vascular wall. Differences in methylation levels between normal and atherosclerotic tissues of the carotid arteries were revealed only for two studied CpG sites (chr11:108089866 and chr11:108090020, GRCh37/hg19 assembly) in the
ATM
gene. Based on this, we can assume the involvement of
ATM
in the development of atherosclerosis. “Overload” of the studied regions with transcription factor binding sites (according to ReMapp2022 data) indicate that the tissue-specific nature of methylation of the regulatory regions of the
MLH1
and
ATM
may be associated with expression levels of these genes in a particular tissue. It has been shown that inter-individual differences in the methylation levels of CpG sites are associated with sufficiently distant nucleotide substitutions.
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