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The article presents the experience of organizing a system for identifying the results of scientific and technical activities of the University, which are objects of foreign economic activity. The main problems of universities that lead to violations in the field of export control are revealed. [ABSTRACT FROM AUTHOR]

Modern microbeam analytical instruments allow obtaining images and maps of heterogeneous minerals and synthetic materials in various signals with micron and submicron spatial resolution. Joint image analysis of several images allows getting more complete information about the sample that one image, but this joint analysis is usually subjective and is carried out at a qualitative level. Current study is devoted to the development of a joint quantitative analysis of images (JPD method) and its software implementation with the aim of more efficiently extracting information about the features of the internal texture and finding the correlation relationships of image characteristics with the physicochemical properties of samples that are in demand for settle issues of mineralogy and materials science. [ABSTRACT FROM AUTHOR]

This article presents a solution to a system of nonlinear equations that describes the growth of crystals in binary melts taking into account the Meirs nucleation kinetics. The crystal size distribution function and supercooling are found as functions of time. In addition, it is shown how the impurity concentration affects the system behavior, and the corresponding conclusions are made. [ABSTRACT FROM AUTHOR]

It is shown that the influence of thermal vibrations of atoms significantly affects the scattering spectra of attoseconds pulses of an electromagnetic field. In this work, a linear chain of identical atoms interacting with an attosecond pulse is studied in detail. [ABSTRACT FROM AUTHOR]

In this paper we propose distinct approach for numerical simulation of the mechanical system's dynamics in the entropy formalism, as opposed to the canonical energy formalism. It was shown that this approach allows one to reproduce any pre-specified equilibrium distribution, and the monotonicity of the entropy increase indicates the general physical correctness from the thermodynamic point of view. [ABSTRACT FROM AUTHOR]

The paper presents the results of simulation experiment for adsorption of a monolayer of graphene-like ZnO on the Si surface from first principles. The results of simulation experiment were compared with the actual experiment results on the studied systems. System adsorption energy and dependence of electron state density from free energy for monolayer of graphene-like ZnO (g- ZnO) on Si terminated (111) surface were calculated. [ABSTRACT FROM AUTHOR]

The evolution of ellipsoidal crystals in a supercooled one-component melt is considered during the intermediate stage of a phase transformation process. The melt supercooling and crystal-volume distribution function are analytically derived using the main contribution to the Laplace-type integral for the melt supercooling. It is shown that the supercooling decreases and the distribution function increases with time as a result of latent heat release by the growing crystals. [ABSTRACT FROM AUTHOR]

The choice of University for training and future profession largely determines the future of a person. The educational environment in which a student is located affects the formation of his personality, character, attitude to work and life. Also very important is the team in which the student is for several years. The training process has a significant impact on the professional development of the future specialist. This study is based on a comparison of the motivation of higher education and choice of future profession among students of the Ural Federal University and the North China University of Water Resources and Electric Power. The article describes the similarity and difference of approaches to the choice of higher education, the reasons for obtaining higher education, the differences in the assessment of the correctness of such a choice. The article was prepared in collaboration with Sun Guofeng, a student (bachelor) of the North China University of Water Resources and Electric Power. [ABSTRACT FROM AUTHOR]

Authors study a dangerous phenomenon in the ecosystem of digital education - the digital addiction of university students. Purpose of article is to use the structural equation modeling (SEM) to identify relationship between digital learning and digital addiction. Measurement of digital addiction was carried out by the method of screening diagnostics of computer addiction (L.N. Yuryeva, T.Yu. Bolbot). Method of confirmatory factor analysis carried we out validation of the method and showed that a one-factor model is acceptable: CMIN = 52,479; df = 44; CFI = 0.933; RMSEA = 0.063. A structural model of interaction of digital learning and digital addiction is proposed. An exploratory and confirmatory analysis of structural model proposed by authors for the interaction of digital learning and digital addiction has shown that there is no positive relationship between digitalization of education and development of digital addiction of students. [ABSTRACT FROM AUTHOR]

The information about cellular respiration and metabolism of malignant and healthy cells is presented. The working example of a custom made magneto-therapeutic device allows to realize inhibitory effect on oncopathology. Thus, as a result of the investigations the intense pulse low-frequency magnetic field exposure results to morphofunctional inhibition of HeLa cell line. [ABSTRACT FROM AUTHOR]

Plant disease detection by using different machine learning techniques is very popular field of study. Many promising results were already obtained but it is still only few real life applications that can make farmer's life easier. The research aim is to select a convolutional neural network for use in the easy-to-use Android application and optimize its parameters by comparing validation accuracy when using the initial convolutional deep neural network and previously trained neural networks that are freely available. [ABSTRACT FROM AUTHOR]

Today, around the world, we can see how transplant capabilities have potentially grown. Organ transplants can not only extend the life of patients but also significantly improve their quality of life. Until now, cornea, liver, kidneys, lungs, heart, spleen, thyroid gland, parathyroid gland, and pancreas have already been transplanted to people. However, there is a serious problem of the shortage of donors. Hence, it is necessary to develop novel methods for creating artificial organs. These methods help us to look for the possible ways of developing the best implants. Three-dimensional bioprinting is an additive bioproduction technology that can accelerate translational research. This may allow the production of artificial tissues and organs that completely replace the damaged organ. In addition, this area of research is diversified thanks to the constant modernization of 30 bioprinters and biomaterials, which play an important role in creating the architecture and functionality of bioprinting design. Here, our research summaries the methods of three- dimensional bioprinting technology and the development of tissue/organ models used in pharmaceutical and toxicological studies. [ABSTRACT FROM AUTHOR]

Polymer composites films based on cerium oxide nanoparticles were obtained. Xanthan gum polysaccharide was used as a matrix. The properties of the films were evaluated using optical microscopy and optical spectrophotometry. Optical microscopy shows homogenous dispersion of nanoparticles with increasing size and some agglomeration. The UV- visible spectrum of the polymer composites exhibit a red shift in the optical band gap with respect to pure xanthan and blue shift with respect to CeO2 nanoparticles. [ABSTRACT FROM AUTHOR]

The technology of creating an ultrathin medical coating for biliary stents based on polyvinylpyrrolidone with the addition of doxorubicin and carbon nanotubes with unique sorption properties is proposed. The adding of carbon nanotubes leads to increasing of the resistance and prolonged action of the drug. [ABSTRACT FROM AUTHOR]

A distributed variant of the Higgins glycolytic model with two spatial variables and diffusion is considered. A parametric description of the zone with Turing instability is found. By computer simulations, a process of the spatial pattern formation is studied. Details of transient processes and multistability are discussed. [ABSTRACT FROM AUTHOR]

Currently, the research on the behavior of radioactive particles in the natural environment is actual direction of radioecology. The regularities of transport and the formation of absorbed doses of β-radiation of "hot" radioactive particles that cause ulcerative necrotic lesions of the digestive tract of rats, playing the role of reference organisms in assessing the radiation risk of environmental pollution by radionuclides for biota and humans, are presented. A compartmental model of particle transport in the gastrointestinal tract of rats was developed and its biokinetic parameters were obtained. Assessment of internal radiation doses was performed on the basis of measured activity in the stomach, small intestine and large intestine of the rats and of absorbed fractions of internal exposure to electrons and photons calculated with the MCNP5 (A General Monte Carlo N-Particle Transport Code, Version 5) using a mathematical rat phantom. Depending on the values of the received activity and absorbed doses of β-irradiation of the mucous membrane, 4 degrees of radiation ulcerative gastroenterocolitis were identified, differing in the depth of radiation damage to the gastrointestinal tract, the development and outcome of radiation damage to the animal body. [ABSTRACT FROM AUTHOR]

The study of cardiac function is important issue in physiological and biological sciences and has relevant implications for clinical practice. The interpretation of the whole-heart experiments is complicated by multi-cellular interactions. This work is devoted to the development of biomechanical tests for studying force-length and passive viscoelastic properties of intact single cardiac muscle cells using a glue-free carbon fiber technique. The developed tests allow analyzing the passive force-length, total force-length and active force-length relations in a beating cardiomyocyte by applying the step stretch protocol. The protocols also can be used to investigate in detail the viscoelastic hysteresis applying sawtooth stretch and release commands on a resting cell. The tracking of viscoelastic hysteresis allows one to study not only changes in the passive tension amplitude, but also the delay between the micromanipulator movement and the cell response or energy dissipation specifying viscoelastic properties. Thus, the developed biomechanical tests are powerful research tools to study cardiac biomechanics at the cell level. [ABSTRACT FROM AUTHOR]

Radiation is one of the factors that constantly affects living organisms. The effect of natural radiation background is supplemented by radiation from artificial radioactive sources, the most common of them are medical devices used as diagnostic and therapeutic equipment. The use of radiation therapy is based on different radiosensitivity of normal and pathologically altered organs, tissues and cells of humans and animals. The search and application of substances that change the sensitivity of living organisms to ionizing radiation to reduce the damaging effect on healthy tissues, while maintaining a positive therapeutic effect, is an urgent issue of modern medical radiobiology. Currently, nanoparticles are widely used as such substances. This paper investigates the effect of mesoporous CeO2 nanopowder on the radiosensitivity of rat alveolar and peritoneal macrophages, dermal fibroblasts, and human cervical carcinoma cells. CeO2 nanoparticles were found to have selective radiomodifying properties in relation to various types of cells. CeO2 nanoparticles had a radioprotective effect on human fibroblasts, increasing their viability after irradiation and speeding up the differentiation of fibroblasts. The nanoparticles acted as radiosensitizers on tumor cells and macrophages, enhancing the damaging effect of ionizing radiation, but the mechanism for increasing sensitivity may be different in each case. The unique enzyme-like properties of cerium dioxide nanoparticles require further investigation of the mechanisms of their action on living systems. This can give an impetus to the development of new effective methods of radiotherapy for various diseases. [ABSTRACT FROM AUTHOR]

Fucoidan is a polyvalent biomodulator with a wide range of biological activity: immunomodulatory, antiviral, anti-inflammatory, antibacterial and antitumor properties. Our research involves the extraction of fucoidan from brown algae by homogenizing the raw material and extracting the polysaccharide from it with a weak solution of hydrochloric acid, cleaning it from polyphenolic impurities and using it in the production of yogurt. Yogurt samples enriched with fucoidan were compared with a sample of whole yogurt without the addition of a polysaccharide, their rheological, textural, color, sensory, as well as microbiological characteristics were evaluated. It is shown that the addition of fucoidan in different concentrations improves the organoleptic properties of the product and shortens the incubation period when yogurt is obtained. [ABSTRACT FROM AUTHOR]

Particulate matter inhalation (PM) in second hand smoke is harmful to smokers and non-smokers. Various additions to cigarettes may affect the amount from PM. Exposure to PM is not only caused lung cancer but also increased risk of stroke breast cancer mortality. Although the main risks may be transferred to the distal lung by particulate matter, A few studies have been interested in studying PM. The present study aims to characterize PM emissions from three different types of cigarettes (Electronic cigarettes, tobacco cigarettes and IQOS cigarettes system). The experiments were carried out in a 65 m3 lab room with burning the three types of cigarettes separately. PM1, PM2.5 and PM10 concentrations were measured simultaneously with aerosol diffusion spectrometer (ADS)1. The Electronic cigarettes achieved the highest values of particulate matter with 193, 1*103 and 2*103 (µg/m3) for PM1, PM2.5 and PM10 respectively. The value of surface area ranged from 3460 for IQOS cigarettes to 7482 for Electronic cigarettes. IQOS cigarettes got less particulate matter concentrations in different sizes. This may be due to the way IQOS cigarettes operate, as the tobacco is heated, not burned. [ABSTRACT FROM AUTHOR]

In this paper we report and analyze development of noncontact trapping of micron-sized particles using optical traps shaped with three-dimensionally structured coherent beam. Trapping fields are generated by interference of laser beams with controllable parameters, including tilt angle, beam waist, polarization state and a number of superposed beams. Visualization and tracking the position of trapped micro-objects in three-dimensional space is realized using axial lensless digital holographic microscopy with real-time computer processing of interferograms. [ABSTRACT FROM AUTHOR]

Polymers like plastics and rubbers are widely used all over the world in different spheres of life due to their attractive properties such as; low density, ability to resist corrosion, and excellent resistant to electricity conduction. However, the continuous use of these materials without a proper management of their wastes coupled with their low biodegradability has resulted in a huge environmental problem globally, as they accumulate both on land and in the ocean. Therefore, in the quest to solve this ecological crisis, there has been an immense interest and investments into biodegradable plastics otherwise known as bioplastics. [ABSTRACT FROM AUTHOR]

A nonlinear control problem for a manipulation robot is considered. The solvability conditions for the problem are obtained in the class of special impulse controls. To achieve the control goal, the kinetic energy of the manipulation robot is used. When finding analytical formulas for control controls, the classical first integrals of Lagrangian mechanics were used. [ABSTRACT FROM AUTHOR]

One of the important biophysical tasks is predicting the risk of developing glaucoma in patients undergoing the laser vision correction for myopia. A mathematical model has been created for individual prediction of the risk of increased intraocular pressure using a regression analysis. [ABSTRACT FROM AUTHOR]

This work explores the impact of health loss risk factors on the state of the cardiovascular system of industrial workers. The registration of intervalograms according to Baevsky R.M. and questionnaire were used as research methods. Studied parameters of heart rate variability in groups depending on the length of experience in harmful working conditions. The obtained data were subjected to statistical analysis. The influence of harmful working conditions on the health status of workers, expressed in adverse changes on the part of the cardiovascular system, is revealed. [ABSTRACT FROM AUTHOR]

The multiscale structural organization of the heart is critical for the myocardial function. The intensive development of the new techniques to investigate cellular and molecular mechanisms underlying the whole heart organization and function makes fluorescent methods a leading research tool in this field. This work is devoted to the study of the contractile function of the myocardium at the single cell and contractile protein levels in normal and pathological conditions. The experimental model of type 2 diabetes mellitus (DM2) was used as an example of the disease condition. We found that DM2 affects the amplitude and time course of contraction and intracellular calcium transient in single left ventricular cardiomyocytes. At the molecular level, these changes were associated with the changes in the interaction of contractile proteins. Fluorescent studies on isolated cardiomyocytes and contractile proteins are important for the assessment of cellular and molecular mechanisms of the cardiac response to pathological interventions. [ABSTRACT FROM AUTHOR]

During the last 40 years a lot of mathematical models were developed for simulation of cardiomyocytes electrophysiology. In this work we propose an algorithm for meta-analysis of these models. Using pairwise comparison, our approach searches for outliers in model predictions that can be obtained in one model, but not in the other. Here, we analyzed four models of the atrial cardiomyocytes with the proposed approach. Our results show significant differences in the ability of models to simulate the delayed afterdepolarization, early afterdepolarization, sustained triggered activity, and the failure of activation. The proposed approach may be useful for the comparison of two models and for obtaining additional rejection criteria for studies with the model populations. Such criteria may improve the reliability of mathematical model predictions. [ABSTRACT FROM AUTHOR]

Health is the most important thing in sports, because the correct reaction of the body to physical activity and recovery, the degree and constancy of sports results strongly depends on its condition. Overtraining is a physical, behavioral and emotional state that occurs when the volume and intensity of a training program exceeds recovery abilities. The basis of this condition is the overstrain of the central nervous system. The expert system that we created allows us to diagnose the presence and degree of overtraining, thereby allowing us to take early actions to maintain efficiency and save efforts on recovery. Hockey is one of the most popular and traumatic sports, so it was advisable to take it as a study. [ABSTRACT FROM AUTHOR]

The work conducted a search for the relationship between the parameters of heart rate variability and athletic performance. It is shown that among 64 parameters for different groups of athletes, one can distinguish those parameters that statistically significantly change during the training process. The parameters are different for a different groups of athletes. [ABSTRACT FROM AUTHOR]

Atrial fibrillation (AF) is a widespread heart disease which prevalence increases essentially in the elderly. In this study, we combined age-related changes in cardiomyocytes electrophysiology with the effects of chronic atrial fibrillation on the population of human atrial cell models. Our age-dependent populations of models are able to reproduce experimentally observed effects of aging on action potential (AP) and calcium transient (CaT) morphology. Simulation of AF remodeling in aging models allowed us to reproduce specific shortening of AP duration on a 90% level, an increase in AP plateau, and a reduction in CaT amplitude. Our modeling results predict the increased risk of sustained arrhythmia in the elderly group of models. [ABSTRACT FROM AUTHOR]

Mathematical modeling of radiation-induced adaptation by changing the DCF (dose change factor) from the time interval was carried out. The selected function describes the experimental data with an approximate valueof R2 = 0.95. The model was tested on a yeast culture of a strain of Saccharomyces cerevisiae. The yeast culture was contained in a nutrient medium of the composition: 4% sugar, 96% distilled water, cell counting was carried out using a Goryaev's chamber. Based on the experimental results, the DCF parameter was calculated. For a time interval of up to 4 weeks, an adaptive response was observed, estimated by the DCF parameter. [ABSTRACT FROM AUTHOR]

The changes of the sentence length in the inaugural speeches of US presidents from 1789 to 2017 are studied. The decrease in the sentence length with time from 45 to 14 words was detected. It is established that a distribution of the sentence length obeys the Weibull distribution. [ABSTRACT FROM AUTHOR]

A distributed reaction-diffusion model with oscillations is considered. It is shown that diffusion flow can suppress self-oscillatory mode and cause stable stationary pattern formation. Different scenarios are studied in order to analyze the multistable behavior in the parametric zone of the oscillations. The effect of random perturbations on the oscillation suppression and the phenomenon of stochastically forced pattern transition are discussed. [ABSTRACT FROM AUTHOR]

Cerium oxide nanoparticles have recently attracted great attention as one of the promising nanomaterials for use in the pharmaceutical industry. However, to assess the potential toxicity of these nanoparticles, information about their biodistribution in the body is necessary. A physiologically based pharmacokinetic (PBPK) modeling is a convenient tool for providing such data. So, this study is devoted to modeling the pharmacokinetics of intravenously injected CeO2 nanoparticles in the body. The designed PBPK model adequately described time courses of CeO2 nanoparticles in various tissues of rats. Simulation results allow to analyze absorption, distribution, metabolism, and excretion of nanoparticles in the body, and provide important information to evaluate their toxicity to biological organisms. [ABSTRACT FROM AUTHOR]