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We suggest a novel approach to predict and clarify the transformation of an arbitrarily polarized wave into two circularly polarized ones, based on the peculiar features of their transmission and reflection from a stack with regularly arranged gyrotropic layers. In spite of the fact that in the Faraday geometry gyrotropic media possess four electromagnetic eigenmodes, we have managed to modify the problem to be analytically resolved within the conventional transfer-matrix method. As a result, we have obtained and analyzed the dispersion relation, as well as the transmission and reflection coefficients, which are applicable for any elliptic polarization of a wave irradiating a gyrotropic superlattice with finite number of unit cells. It is shown that there exists a wide range of wave frequency and magneto-optical parameter (proportional to external dc magnetic field) inside of which the wave of given circular polarization is perfectly transmitted, while the wave with the opposite circular polarization is completely reflected. Thus, under certain conditions, the incident plane wave (taken as an appropriate example) splits up into the transmitted and reflected circular waves with mutually inverse rotations. We indicate conditions when a relatively small variation of the magnetization can reverse the polarizations mentioned above.

The challenge of multicriterion selection of lower-limb prosthesis components is discussed. The issue of developing software for a global electronic database of prosthetic modules for modular prostheses for the disabled is considered. The database is intended for remote use by specialists. Successfully solving this challenge should accelerate the development of personalized prosthetics and improve the quality of the medical rehabilitation of the disabled.

The number of people involved in regular exercise and sports is increasing. Not infrequently, this is associated with intake of sports biologically active food supplements (BAS) and stimulators of physical ability. Data has been reported on the frequency of use of physical ability stimulators among professional athletes and on the use of the most popular food supplements among young people. Special attention is paid to the effect of such use on the cardiovascular system of athletes. This review describes negative cardiac effects and clinical cases of death of athletes due to the use of such supplements and stimulators.

Introduction To date, there is no unified approach to the choice of tactics in surgical treatment of osteoarthritis of the first metatarsophalangeal joint (OA of the first MTP joint). On the other hand, it is known that the technique of autologous matrix-induced chondrogenesis has been successfully used for osteochondral defects in the hip, knee and ankle joints. Therefore, we have proposed to use this technique in the treatment of patients with OA of the first MTP joint. Purpose To study the possibility of surgical treatment of patients with OA of the first MTP joint with the use of chondroplasty utilizing the technique of autologous matrix-induced chondrogenesis, to demonstrate the immediate and mid-term results of such operations. Materials and methods Chondroplasty was performed in 15 patients (16 feet) with OA of the first MTP joint. The examination determined the range of motion in of the first MTP joint; the condition was assessed according to such scales as VAS for pain, AOFAS, FFI. Chondroplasty in of the first MTP joint was performed with the technique of induced chondrogenesis using a collagen matrix. The results of the operations were evaluated after 3, 6 and 12 months. Results As early as 3 months after the operation, there was a marked significant increase in the range of motion and a decrease in pain of the first MTP joint. Moderate positive dynamics were observed after 6 and 12 months. Conclusion The results of the operations showed that chondroplasty of the first MTP joint is an effective method of surgical treatment that provides pain relief and significantly improves the quality of life of patients with OA of the first MTP joint. However, it is necessary to study long-term results.

Experimental development and manufacture of a SCARA-robot prototype for further use in laboratory stands is underway. The description of the experimental prototype, the control principle and the analysis of the results are given.

The reactions of monomeric [(dpp-Bian)M(thf)4] (M = Ca (1a), Sr (1b); dpp-Bian = 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene) with 4,4'-bipyridyl (4,4'-bipy) proceed with electron transfer from dpp-Bian2- to 4,4'-bipy0 to afford calcium and strontium complexes containing simultaneously radical-anionic dpp-Bian- and 4,4'-bipy- ligands. In tetrahydrofuran (thf) the reactions result in 1D coordination polymers [{(dpp-Bian)M(4,4'-bipy)(thf)2}·4thf]n (M = Ca (2a), Sr (2b)), while in a thf/benzene mixture the reaction between 1a and 4,4'-bipy affords the 2D metal-organic framework [{(dpp-Bian)Ca(4,4'-bipy)2}·2thf·2C6H6]n (3). The structures of compounds 2a,b and 3 have been determined by single-crystal X-ray analyses. The presence of the ligand-localized unpaired electrons allows the use of ESR spectroscopy for characterization of the compounds 2a,b and 3. DFT calculations of model calcium complexes with the dpp-Bian, 4,4'-bipy, and thf ligands confirm the energetically favorable open-shell configurations of the molecules bearing the 4,4'-bipy fragments. The magnetic susceptibility measurements confirm the presence of two unpaired electrons per monomeric unit in 2a,b and 3. The thermal stability of compounds 2a,b and 3 was studied by thermogravimetric analysis (TGA). To the best of our knowledge, 3 is the first MOF simultaneously containing two different paramagnetic bridging ligands inside the framework.

The article presents the results of a study of the catalytically active system Ni-Al-Al(OH)3-Ca(OH)2-Mg(OH)2 for efficient synthesis gas production. A technology for obtaining volumetric porous functional coatings has been developed using the method of supersonic cold gas-dynamic spraying. The advantages of this method and its possibilities from the point of view of producing synthesis gas with high activation energy are shown.

A comparison of the kinematics used in additive technologies is carried out in order to determine their advantages and disadvantages. The most promising kinematics will be used to create a laboratory stand based on it.

The article discusses ways to Mature grain properties and describes its behavior during harvesting, to optimize the selection of grain moisture state, and also analyzes the requirements for the selection of methods and design of a high-frequency module, which provides for the use of instrumentation for monitoring grain moisture, as well as their high accuracy and the possibility of conducting measurements in the field.

The analysis of the consolidated health assessments was carried out for 1,687 athletes – representatives of 52 sports of the nationaljunior teams of Russia, based on the results of the in-depth health screening at the premises of Children’s Central Clinical Hospitalof Federal Medical and Biology Agency of Russia in 2018. Due to the various reasons, 399 (23.6%) athletes temporarily or permanently were withdrawn from the sports. The most common reason (36%) for the temporary or permanent withdrawal from the sportswas the pathology of the cardiovascular system. In its structure, the leading position is occupied by the stress cardiomyopathy –the condition caused by the physical and emotional overload of the athlete.

Introduction. To date, there is no single approach to the surgical treatment of hallux rigidus. In turn, it is known that in the presence of bone-cartilaginous defects in knee, hip and ankle joints, the autologous matrix-induced chondrogenesis is quite successfully used. In this regard, we have proposed to use this technique in patients with hallux rigidus. The aim of the study was to evaluate the clinical efficacy of the 1st MTP joint chondroplasty using the induced chondrogenesis technique in patients with HR, to analyze the immediate and medium-term results of the operations in terms of pain and function. Materials and methods. The 1st MTP joint chondroplasty has been performed in 21 patients with hallux rigidus. Before the surgery the range of motion (ROM) in 1st MTP joint was measured; the foot condition was evaluated using such scales as VAS of pain, AOFAS, VAS FA. The 1st MTP joint chondroplasty was performed using the technique of the induced chondrogenesis with collagen matrix. The results of surgical treatment were evaluated within 3, 6 and 12 months after surgery. Results: 3 months after the operation, a significant decrease in pain, an increase in ROM in 1st MTP joint and an improvement in the foot function were observed. Subsequently, a moderate positive dynamic was observed. Conclusion: the results of the operations showed that the 1st MTP joint chondroplasty can be an effective method of surgical treatment, which allows to relieve pain and significantly improve the quality of life of patients with hallux rigidus, both young and elderly. Also, this technique can be used in the treatment of patients with rheumatic diseases of the low activity or remission.

The article presents the results of long-term research on the creation of high oil and large-fruited sunflower varieties for use in 5 (Central Chernozem) and 7 (middle Volga) regions. Increasing the yield of sunflower oil seeds and improving their quality largely depends on targeted breeding work. Agricultural production needs highly productive precocious and early maturing varieties that are adaptable to local agroecological conditions and tolerant to the main common pathogens. Agroclimatic conditions of the region do not allow growing foreign-selected sunflower hybrids here, as they do not reach economic maturation (full ripeness). Breeders created a new high-oil (53.3%) variety of sunflower Chakinsky 100 with a yield potential of up to 50 centner per hectare in the Tambov research Institute (a branch of the I. V. Michurin Federal Research Center). The variety is included in the state register of breeding achievements in 2018 (patent no. 9648).

This paper deals with the densities of aqueous solutions of N-methylacetamide (NMA) in the range of concentrations x (starting from 0.0095 to 0.699) at T = 278.15, 288.15, 298.15, 308.15, 323.15, a...

Electrical machines are widely used in various branches of the national economy. In particular, electric motors are one of the main elements in electrical power generation systems. The electric machines used at this ensure reliable operation of individual power units and the entire power supply system in general. The reliability of engines’ operation is largely determined by the quality of its insulation, that is why the improvement of methods for controlling the isolation of high voltage asynchronous motors is an actual task. The aim of the research is to develop a method of continuous automated control of electric insulation condition in stator windings of an asynchronous motor basing on the analysis of experimental and industrial operation data making it possible to estimate the dynamics of changes in the main insulation parameters. The main elements showing reliability of high-voltage electric machines, applied electro-insulation structures, methods for controlling insulation resistance in a high-voltage electric motor are considered in the article. The research performed was based on the results of the experimental and industrial operation of the automated system of insulation control under working voltage at the real facility carried out by the group of companies «Energopribor» of the town of Cheboksary. The analysis of existing methods for insulation control is given, the scheme of insulation control by superpositioning test current with the frequency which is different from industrial one. The authors propose the method to estimate the dynamics of resistance changes in insulation of stator windings of the asynchronous motor, to reveal its approximation to the maximum permissible state in the process of operation and in reserve shutdown. Software modeling was carried out, the results of which correspond to the data of experimental and industrial operation. The results obtained during the research allowed to systematize the obtained experimental data, to modernize the hardware part of the diagnostic complex DUKAT-SCAD, to outline the criteria area for its applicability.

A technique for estimating the effective acoustic parameters of the bottom in shallow water areas under ice cover has been developed. The methodology compares the experimental and simulated dependences of the sound field amplitude on depth at a distance from the source about an order of magnitude greater than the depth of the water area. The effective parameters are the values of the sound speed in the bottom, density, and attenuation coefficient of acoustic waves, which provide maximum agreement with experimental data in the calculations. The methodology was tested in a field experiment on Lake Baikal and can be recommended for developing autonomous acoustic monitoring systems.

This study developed practical recommendations for using the method of cold gas dynamic spraying to obtain functional coatings in a production environment using powders of nickel, titanium and aluminum of the grades: PNE-1 (Ni), PTOM-1 (Ti) and PA-VCh (Al). The temperature and speed parameters of the process were optimized using mechanical mixtures (Ni + Ti) and (Ni + Al) as an example. High adhesion of the coating and coefficient of powder use were ensured with maximum productivity at the DIMET-403 installation.

An experimental study of the effect of temperature control of the working area of the FFF / FDM 3D printer on the mechanical properties of the products was carried out. Materials and methods of research and analysis of results were presented.

The condensation reactions of 5-bromoacenaphthenequinone with 2,6-diisopropylaniline and 4‑bromo-2,6-di-iso-propylaniline afford new mono- and tribromosubstituted bis(arylimino)acenaphthenes: 1,2-bis[(2,6-diisopropylphenyl)imino]-5-bromacenaphthene (Dpp-Br-Bian) (L1) and 1,2-bis[(4-bromo-2,6-diisopropylphenyl)imino]-5-bromacenaphthene (p-Br-Dpp-Br-Bian) (L2), respectively. Compounds L1 and L2 act as neutral ligands in the [(Dpp-Br-Bian)ZnCl2] (I), [(p-Br-Dpp-Br-Bian)AlCl3] (III), and [(p-Br-Dpp-Br-Bian)GaCl3] (IV) complexes synthesized by the reactions of free diimines with the corresponding metal chlorides. The reaction of the known dibromosubstituted derivative 1,2-bis[(4-bromo-2,6-di-iso-propylphenyl)iminoacenaphthene (p-Br-Dpp-Bian) (L3) with copper(I) chloride also affords complex [(p-Br-Dpp-Bian)CuCl] (II) with the neutral diimine ligand. New compounds L1, L2, and I–IV are characterized by NMR, IR spectroscopy, and elemental analysis. The molecular structure of complex I is determined by X-ray structure analysis.

The density of solutions of 1,4-dioxane (DO) in monoethanolamine (MEA) in 0–0.2 ppm DO concentrations and the temperature range of 25–75°C is measured to examine solvophobic effects in solvents with spatial networks of hydrogen bonds. Apparent and excess molar volumes of DO in a MEA–DO mixture are calculated. The obtained concentration and temperature dependences of the bulk properties of DO show there were no solvophobic effects in the studied liquid system, which is explained by the insufficient lability of the H-bond network in MEA in the investigated range of temperatures. The results are compared to similar literature data on the H2O–DO and ethylene glycol (EG)–DO systems. The hydrophobic effect was detected earlier in the H2O–DO system; based on the bulk properties, the solvophobic effect was not observed in the EG–DO system in the temperature range of 25–75°C.

The densities of aqueous solutions of acetamide up to a mole fraction of x2 = 0.3875 are measured over a wide range of temperatures (274.15–333.15) K at atmospheric pressure. The partial molar volumes of water and acetamide, the partial molar isobaric expansivities of the components, and the limiting partial properties of acetamide in water are calculated. The shift in the temperature of the maximum density of water at low temperatures is calculated. The results are discussed in terms of solute–solvent and solute–solute interactions.

Macrohectopus branickii is the only amphipod with an exclusively pelagic lifestyle. Although this species plays an important role in the diet of pelagic fish of Lake Baikal, there is no regular monitoring of its abundance. We present data on the status of the population from a lake-wide 2015 survey and compare these data with available historical information. The survey was conducted with a modified Juday net and simultaneous hydroacoustics profiling from up to 700 m depth to the surface. The abundance of M. branickii in the pelagic zone over depths >300 m in 2015 averaged 1700 ind/m2 (range 320–4090 ind/m2) and the biomass averaged 3.7 g/m2 (range 1.1–14.4 g/m2). Sites with the greatest abundance of M. branickii were located in the South and Middle Basins off the eastern shore. These values are comparable to the published data from 1950s to 1980s. The characteristics of nearshore aggregations of larger mature females were more variable and need further study.

Surveys to locate and monitor bubble gas seeps in Lake Baikal have been conducted mainly using the active echolocation methods since the 2000s. This paper compares the active acoustic method with a newly developed optical and passive acoustic methods using the example of the shallow-water gas seep Istok in the Selenga shoal. The optical method is based on processing of underwater video records of ascending bubbles while the passive acoustic uses spectral analysis of gas jet noise recorded using a hydrophone. Optical and passive acoustic methods enables estimation of the bubble size distribution function, which is necessary for the calculation of the bubble gas flux. The latter can be evaluated from active echolocation or optical data. By applying these methods, their possibilities and limitations are revealed as well as benefits of their combined use and ways to improve their accuracy in future.

According to MEDLINE database there were about 1278 papers on liver abscess published in a period from 2001 to 2015. The aim of the study isto improve liver abscess treatment results comparing minimally invasive and traditional operative techniques. Materials and methods.137 patients were included in the study and divided on two comparison groups. Traditional methods were used for the treatment of 66 participants of the control group (48.2 %). For 71 patients (51.8 %) of the general group the mini-invasive drainages were predominating. Results.Cholangiogenic causes of liver abscesses were found in 41 patients (29.93±3.91 %), cryptogenic ones – in 37 (27.01±3.79 %), haematogenous causes – in 29 (21.17±3.49 %), contact ones – in 16 (11.68±2.75 %), posttraumatic ones – in 11 (8.03±2.32 %) and purulent distraction of metastases – in 3 (2.19±1.25 %). Single abscesses occurred more often – in 117 (85.40±3.02 %), multiple once – in 20 (14.60±3.02 %). Mostly 3, 6 and 7 liver segments were damaged – 19 (13.88±2.95 %), 35 (25.55±3.73 %), 44 (32.12±3.99 %). In control group, the abscess drainage via laparotomy was performed on 58 patients (87.88±4.02 % of 66 ones) versus 21 (29.58±5.42 % of 71 ones) in general group. Percutaneous drainage was used in 8 (12.12±4.02 %) and in 44 (61.97±5.76 %) cases respectively. 6 or 8.45±3.30 % laparoscopic interventions were used only in the general group. Finally, mini-invasive drainages were applied in the greater part of general group - 50 (70.42±5.42 %) versus 8 ones (12.12±4.02 %) in control group. Conclusions.Minimally invasive liver abscess drainages showed a significant reduction of postoperative complications from 24.24±5.27 % in the control group to 12.66±3.95 % in the general group, shortening of hospital terms from 14.6±1 in control to 5.2±0.8 days and decreasing of mortality from 7.58±3.26 % to 2.82±1.96 %.

Sediments of the deep water Krasny Yar methane seep area of Lake Baikal contain channels of 1 cm in diameter and up to a depth of 150 cm that have a high water content and are characterized by higher oxidized and reduced conditions than the surrounding sediment. New data of lithological and geochemical studies, including the full anionic and cationic composition of pore waters, indicate that chemical flow at the sediment surface of the seep is heterogeneous in space with both areas of inflow of fluids and areas with outflow of fluids. We suggest that much of this flow is modulated by more complex hydrological processes that may include aqueous pumping driven by gas expulsion- and changes in the permeability of the conduits due to gas hydrate formation and dissociation. We discuss the seep output fluid chemistry and heat flow in relation to the above hydrological processes and propose a seep model where fluid and gas migrations act at different spatial scales partly favored by hydrate accumulation and the fresh water conditions of Lake Baikal.

Study purpose.To determine the prevalence of syncope among young elite athletes.Material and methods.In the course of the study “Epidemiology of the syncope in children and adolsceents in elite sport (EPISODE-S)” ** 1687 young elite athletes 16.3±1.5 years old, members of the Russian National teams from 52 sports discipline were surveyed. Control group was 1732 nonathletes the same age and gender.Results.113 (6.7%) athletes had syncope (girls – 73.5%). More often, syncope registered in basketball (10.5%), judo (10.3%), rhythmic gymnastics (9.1%), figure skating (8.0%), volleyball (7.4%). According to the results of questioning in schools, syncope was noted in 4.2% of students. In all cases among athletes syncope had neurally mediated (reflex) nature by the results of the additional examination. Four out of 1687 athletes (0.24%) had the long QT syndrome, but they haven’t got syncope.Conclusions.1. In the young elite athletes prevalence of syncope is 6.7% (4.2% for non-athletes) and significantly more common in girls (11.6% vs. 3.4%). More often, syncope occurs in sports where tall athletes are selected (basketball, volleyball) or strict weight control is required (rhythmic gymnastics, figure skating, judo). The majority of the young athletes has benign neurally mediated nature of syncope and doesn’t need restrict for the sport, but the first of all they require the exclusion of diseases with a high risk of sudden cardiac death.**Epidemiology of thesyncope in children and adolsceents in elitesport (EPISODE-S)

Results of two scientific cruises carried out in July 2018 and September 2019 were used for an analysis of variability in spectral bio-optical properties of Lake Baikal. Chlorophyll a concentration, spectral light absorption coefficient of phytoplankton, non-algal particles and colored dissolved organic matter varied in ~order of magnitude between stations. Vertical distribution of these bio-optical parameters depended on water column stability in euphotic layer. The chlorophyll a profiles were characterized by maximum near the bottom of euphotic zone. In the layer of deep chlorophyll a maximum the phytoplankton absorption spectra had a specific feature – a local maximum at 550-570 nm. It was associated with relative increasing of phycoerythrin containing species in phytoplankton community. The absorption budget at 440 nm showed that the CDOM was the main optically active component, which provided ~ 50 % contribution to total absorption on averaged over Lake Baikal surface.

The article presents the autonomous hydrometeorological station for organizing networks of monitoring the hydrological conditions in water bodies and collecting the related information, such as meteorological, hydrophysical, etc. The station showed high autonomy and accuracy in measuring water level in a water body. It also has an integrated GSM module for remote data transmission. It was successfully tested during a trial installation on the Slyudyanka River (Lake Baikal basin) in the autumn of 2020, which allowed us to characterize the behaviour of the main hydrological parameters of the watercourse.

OBJECTIVE The aim: To investigate the effectiveness of complex treatment of purulent wounds with the use of high pressure aerodispersed mixture of antibacterial drug using sorbents and correction of hydrogen index. PATIENTS AND METHODS Materials and methods: In total, 54 patients were treated, out of which there were 26 patients with purulent wounds in the main group and 28 patients in the control group. Patients in the main group were treated according to the developed method, patients in the control group were treated with traditional antiseptics and water soluble ointments. RESULTS Results: Within patients of the main group, there was a decrease in the duration of inflammatory process, decrease in the quantity of microorganisms in the wound; slight changes in the sensitivity of the microorganisms to antibacterial preparations, compared with the control group, which showed a high percentage of development of resistant strains; decreased edema and secretion from wounds, the early appearance of granulation. CONCLUSION Conclusions: The use of the proposed approach reduces the microbial burden on the wound, accelerates its purification from purulent-necrotic tissues and reduces the duration of the inflammatory process due to the presence of the microbial factor.

An experimental technique for compression tests of the sandwich specimens with thin outer layers made of fiber reinforced composite is proposed. The proposed method is focused on testing thin layers of composite material, specimens of which, even with a very short gage length, lose their stability, thereby distorting the determined value of the ultimate stress. Experimental studies of the failure mechanism of sandwich specimens with outer layers with [0°] lay-up under axial compression have been carried out. The possibility of realizing the shear buckling mode for specimens with different geometric parameters was revealed, which allows the determined ultimate stress formed in the outer layers to be taken as a mechanical characteristic when calculating the strength of structures made of composite materials. It is shown that for specimens with a honeycomb core in the outer layers under compression, an in-phase flexural buckling mode occurs. The implementation of a non-classical shear buckling mode is possible only for specimens with a rigid core, which was used as balsa wood.

Electronic supplementary material is available online at https://doi.org/10.6084/m9.figshare.c.5713034. Copyright © 2021 The Authors. Amplification of the proto-oncogene MYCN is a key molecular aberration in high-risk neuroblastoma and predictive of poor outcome in this childhood malignancy. We investigated the role of MYCN in regulating the protein cargo of extracellular vesicles (EVs) secreted by tumour cells that can be internalized by recipient cells with functional consequences. Using a switchable MYCN system coupled to mass spectrometry analysis, we found that MYCN regulates distinct sets of proteins in the EVs secreted by neuroblastoma cells. EVs produced by MYCN-expressing cells or isolated from neuroblastoma patients induced the Warburg effect, proliferation and c-MYC expression in target cells. Mechanistically, we linked the cancer-promoting activity of EVs to the glycolytic kinase pyruvate kinase M2 (PKM2) that was enriched in EVs secreted by MYC-expressing neuroblastoma cells. Importantly, the glycolytic enzymes PKM2 and hexokinase II were detected in the EVs circulating in the bloodstream of neuroblastoma patients, but not in those of non-cancer children. We conclude that MYC-activated cancers might spread oncogenic signals to remote body locations through EVs. Neuroblastoma UK to AS and FAPESP SPRINT Award (50356-4); FAPESP (2014/06863-3, 2018/18257-1, 2018/15549-1, 16/50356-4); CNPq “bolsa de produtividade”; Ricerca Finalizzata GR11-172. https://doi.org/10.6084/m9.figshare.c.5713034

Aim . The continuous monitoring of changes in ecosystems must be carried out in connection with global climate changes that affect the state of water bodies. Remote sensing methods have many advantages as a promising method for monitoring biocenoses in large water bodies. We carried out a comprehensive study comparing the results obtained using the latest instruments and methods to expand their further application to the continuous monitoring of water bodies. Material and Methods . The field research was undertaken using hydroacoustic sensors, submersible holographic camera and high‐resolution thermal sensors in addition to the classical methods of studying the zooplankton ecology – the Juday net and CTD probe. Water temperature, chlorophyll, photosynthetically active radiation and other parameters were measured with an AAQ‐Rinko probe. We provided data for one vertical up to a depth of 100 m. Results . The main components of mesozooplankton during the ice period are different age stages of the endemic crustacean Epischura baikalensis Sars 1900 and several rotifer species. The article discusses the heterogeneity of the environment and the distribution of plankton detected by various instruments. Conclusion . The experimental results obtained with the help of a set of devices show that the distribution of zooplankton is very strongly dependent on the physical parameters of the environment. The use of remote sensing methods is an important step towards the automation of basic monitoring of the ecosystem of Lake Baikal and other water bodies. The obtained field data will make it possible to further improve the pattern recognition algorithm in the software of the holographic installation for the specific conditions of Lake Baikal. The results of the vertical distribution and migrations of zooplankton in connection with environmental parameters are assumed to be processed using mathematical modeling methods.

A study of the specific time of 3D printing using the FFF technology of one gram of material is being carried out. It describes the methodology of the study, using software, and configure it in a study, an analysis of the data and the final results.

The development and research of a device for automating the manipulation of big-bag in the process of packaging. A description of the design and operation of the device, as well as the results of computer modeling of this operation was presented.

A computer model of a fragment of an automated dynamic reconfigurable panel is being developed and researched. The stresses, displacements, and deformations arising at various loads are investigated. The results of computer research allow you to choose a rational shape and configuration of the panel, which leads to an increase in its strength characteristics and weight reduction.