Blagoveshchensk, Russia

Amur State University
Blagoveshchensk, Russia

Amur State University is a university in Blagoveshchensk, Amur Oblast, Russia. Wikipedia.

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Maslovskaya A.G.,Amur State University | Barabash T.K.,Amur State University
IOP Conference Series: Materials Science and Engineering | Year: 2017

The article presents some results of fractal analysis of ferroelectric domain structure images visualized with scanning electron microscope (SEM) techniques. The fractal and multifractal characteristics were estimated to demonstrate self-similar organization of ferroelectric domain structure registered with static and dynamic contrast modes of SEM. Fractal methods as sensitive analytical tools were used to indicate degree of domain structure and domain boundary imperfections. The electron irradiation-induced erosion effect of ferroelectric domain boundaries in electron beam-stimulated polarization current mode of SEM is characterized by considerable raising of fractal dimension. For dynamic contrast mode of SEM there was revealed that complication of domain structure during its dynamics is specified by increase in fractal dimension of images and slight raising of boundary fractal dimension. © Published under licence by IOP Publishing Ltd.

Popov A.B.,Amur State University
Bulletin of the Tomsk Polytechnic University, Geo Assets Engineering | Year: 2015

The relevance of the research. At the moment mining industry production in Russia increases. But geological sector is no longer able to provide necessary increase in reserves for the extractive industries, which is caused not only by the gradual depletion of mineral resource base of the country and other objective reasons, but by work organization in the industry as well. Over the years the development of the geological sector was hindered by a number of barriers related to the imperfection of the legal framework and, as a consequence, to the administration inefficiency. The main aim of the study is to identify the main problems of state regulation in geological industry and possible solutions; to show how the change in certain provisions of the regulatory framework for the natural reserves use can reduce the cost of exploration work, delays in obtaining permits and, as a consequence, the temporal duration of geological exploration itself. The methods of study: the analysis of some features of state regulation in geological industry as well as the study of certain legislative framework provisions for geological exploration in Russian Federation. The paper provides as well the assessment of practical relevance and feasibility of individual regulations and comparison between organization of geological exploration in Russia and in foreign countries. Results. The author has found out the most important issues that can be solved by introducing amendments to the existing legislation and has given the economic substantiation of inconsistency of certain legal provisions to the principles of modern market economy. The paper demonstrates the way these problems are solved in other developed countries. The author developed the proposals for improving the state regulation of geological exploration. Conclusions. The proposals for solving the identified problems have both legal and economic components. Implementation of the proposed recommendations would improve the state of geological industry in Russia due to changes in the legal framework. The solution of the problems identified would not require additional financial investments and would also reduce the temporal duration of geological exploration and cut unnecessary expenses of geological enterprises.

Lyapunov M.Y.,Amur State University
Bulletin of the Tomsk Polytechnic University, Geo Assets Engineering | Year: 2015

Taking complex ecological measures is extremely necessary for successful functioning of the developed layers of minerals and adoption in this case of practical recommendations. These conditions can be acceptable, if adequate information on the contemporary state of natural environment both as a whole and its components will be obtained. When solving the ecological problems of local nature those geo-systems, which are most subjected to anthropogenic disturbances, connected with mining production, become the most vulnerab-le. The study of gold-ore layer Pioneer is connected with the forecast evaluation of adverse effect of mining operations on environ-ment. For fulfilling these works the objective information on a deposit geo-ecological state is required. The aim of the research is to analyze the contemporary ecological-geochemical condition of surface waters within the gold-ore layer Pioneer. Methods of the study: topographical-geochemical, statistical, topographical-ecological analysis, atomic-absorption, atomic-emissive and mass-spectral, analysis of literary and fund materials. Results. According to the results of geo-ecological studies of the territory of gold-ore layer Pioneer the author has estimated the sur-face waters state. The author calculated the load factors according to the processed results of the analyses of aqueous tests for each ele-ment, the summary index of 1'2, 3'4 classes water pollution and estimated the pollution degree (permitted, moderately dangerous, dangerous, extremely dangerous). By the results of data processing the map of the results of surface water hydrochemical testing was built. The surface waters over the area under study are contaminated everywhere and they are characterized on total pollution from the moderately dangerous to the extremely dangerous degree. In essence, they are polluted with the following chemical elements and com-pounds: iron, manganese, aluminum, lithium, oxidizability, colorfulness and mercury is among the elements of the first classes of dan-ger. The increased contents of iron, manganese, aluminum, lithium, organic matter, colorfulness are caused by natural geochemical and hydrochemical situation. The presence of swampiness, peats and, as a result, oxidizing hydrochemical conditions, contribute to their in-creased concentration.

Krasnikov I.,Amur State University | Seteikin A.,Amur State University
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2017

Biophotonics involves understanding how light interacts with biological matter, from molecules and cells, to tissues and even whole organisms. Light can be used to probe biomolecular events, such as gene expression and protein-protein interaction, with impressively high sensitivity and specificity. The spatial and temporal distribution of biochemical constituents can also be visualized with light and, thus, the corresponding physiological dynamics in living cells, tissues, and organisms in real time. Computer-based Monte Carlo (MC) models of light transport in turbid media take a different approach. In this paper, the optical and structural properties of biomaterials discussed. We explain the numerical simulationmethod used for studying the optical properties of biomaterials. Applications of the Monte-Carlo method in photodynamic therapy, skin tissue optics, and bioimaging described. © 2016 SPIE.

Pavelchuk A.V.,Amur State University | Maslovskaya A.G.,Amur State University
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2017

This article reveals the problem of electron transport as well as charging effect analysis in ferroelectrics subjected to electron beam irradiation at diagnostics with scanning electron microscope (SEM) techniques. The parameters of the electron irradiation doze and source function were estimated by means of 3D-Monte-Carlo simulation of electron trajectories in the solid specimen. The computation data were demonstrated for typical ferroelectrics irradiated by intermediate-energy electron bunches (10-40 keV). The modification of reaction-diffusion model was also presented to evaluate the electron beam-induced charging dynamics in ferroelectrics. The simulation was based on the joint numerical solution of the continuity equation and Poisson equation taking into account the intrinsic radiation-induced diffusion processes. The findings from this study enable demonstrating charge distribution, dynamics of the potential distribution, electric field components and electron beam-induced component of polarization at assigned parameters relative to experimental condition of reversal process of domain structure in electron beam-irradiated ferroelectrics. © 2016 SPIE.

Mikhailov M.M.,Tomsk State University | Neshchimenko V.V.,Amur State University
Astrophysics and Space Science Proceedings | Year: 2017

Synergistic effects in two types of “solar reflectors” thermal control coatings under conditions simulating geostationary orbit have been investigated by exposing them to separate and complex (simultaneous and continuous) irradiation by solar spectrum photons, electrons and protons. Energy and flux of protons and electrons were selected using a replacement model. This model based on replacement spectra of charged particles by monoenergetic beams during ground testing using the experimental fluence and energy dependences of the changes in solar absorptance. It has been found that the change in solar absorptance of complex irradiation is less than the sum of changes in solar absorptance due to the separate irradiation. Also, the additivity coefficient reaches up to 0.55 and depends on the type of coatings, acceleration and time of complex irradiation. © Springer International Publishing AG 2017.

The results of modeling the dynamic charging processes that arise when ferroelectrics are under the action of an electron beam in a scanning electron microscope are presented. Implementation of the model is based on simultaneous solution of the continuity equation and Poisson equation with allowance for the radiation-stimulated intrinsic conductivity of the irradiated sample and with an initial charge distribution determined using the Monte Carlo method. The multidimensional boundary evolutionary problem is solved using grid methods. The model permits one to study the dynamics of the process of the electron-beam-induced charging of ferroelectrics. Estimates for the values of fields generated by charges accumulated during the irradiation process are presented for a set of modeling parameters corresponding to physical data obtained in experimental observations of the polarization switch for a ferroelectric lithium niobate crystal. © 2013 Pleiades Publishing, Ltd.

Krasnikov I.,Amur State University
Journal of biophotonics | Year: 2011

Continuous-wave laser micro-beams are generally used as diagnostic tools in laser scanning microscopes or in the case of near-infrared (NIR) micro-beams, as optical traps for cell manipulation and force characterization. Because single beam traps are created with objectives of high numerical aperture, typical trapping intensities and photon flux densities are in the order of 10(6) W/cm(2) and 10(3) cm(-2) s(-1), respectively. The main idea of our theoretical study was to investigate the thermal reaction of RBCs irradiated by laser micro-beam. The study is supported by the fact that many experiments have been carried out with RBCs in laser NIR tweezers. In the present work it has been identified that the laser affects a RBC with a density of absorbed energy at approximately 10(7) J/cm(3), which causes a temperature rise in the cell of about 7-12 °C. Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Maslovskaya A.,Amur State University | Barabash T.,Amur State University
Ferroelectrics | Year: 2013

The paper describes the results of dynamic simulation of electron beam-induced polarization reversal process in ferroelectrics with a focus on a fractal approach. The methods of fractal analysis were used to estimate the scaling characteristics of TGS-domain structure images and polarization switching current obtained with the SEM. The computer simulation results of domain configuration geometry and corresponding form of switching current are presented. Using modified Kolmogorov-Avrami model, the polarization current was determined taking into account differential equation with fractional derivative. The main features of simulation curve of polarization switching current correspond to experimental data observed. Copyright © Taylor & Francis Group, LLC.

Kezina T.V.,Amur State University
Stratigraphy and Geological Correlation | Year: 2011

The Wuyun deposit of brown coal is situated on the right bank of the Amur River in the People's Republic of China, 35-60 km away from the Arkhara-Boguchan brown coal deposit. The Belaya Gora stratotype of the latter and the southwestern flanks of the Raichikhinsk brown coal field (Russia) have been studied previously when the author analyzed in detail the Danian and Selandian-Thanetian palynoassemblages from the Upper Tsagayan Subformation. A section of the Wuyun Formation was studied at the eponymous deposit in 2002 and 2004. Based on new palynological results and analysis of data from earlier publications, two palynoassemblages distinguished there in the Paleocene coal-bearing succession enable correlation between sections of relevant deposits on the right and left banks of the Amur River. Data on the taxonomic composition of palynoassemblages are considered, and their basic and characteristic taxa are figured in paleontological plates. © 2011 Pleiades Publishing, Ltd.

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