Siberian State Technological University

www.sibstu.kts.ru
Syamzha, Russia

Siberian State Technological University is the oldest university in Krasnoyarsk, Russia. It was established in 1930 as the Siberian Institute of Forest . Later it was known as the Siberian Technical Institute of Forest , Siberian Technological Institute , Krasnoyarsk State Technological Academy and finally the Siberian State Technological University .Currently 15,000 students are studying in one of the nine faculties. Wikipedia.


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Pal'nikova E.N.,Siberian State Technological University | Sukhovol'skii V.G.,Russian Academy of Sciences
Contemporary Problems of Ecology | Year: 2016

A model that implies highly inertial regulation of phytophage numbers by entomophages has been applied for the analysis of phytophage–entomophage interactions during different phases of the gradation cycle of phyllophagous insects. The data on population dynamics and the degree of parasite infestation in pupae of the pine looper Bupalus piniarius L. and fir looper Ectropis (=Boarmia) bistortata Gz are used to verify the model. The results of field studies apparently are in good agreement with the model of highly inertial regulation in the “phytophage–entomophage” system. The model that is proposed explains the decisive roles of different factors (entomophages, predators, or diseases) in the population dynamics of phytophages under different conditions. © 2016, Pleiades Publishing, Ltd.


Kuklin A.V.,Siberian Federal University | Kuzubov A.A.,Siberian State Technological University | Krasnov P.O.,Siberian State Technological University | Lykhin A.O.,Siberian Federal University | Tikhonova L.V.,Siberian Federal University
Journal of Alloys and Compounds | Year: 2014

A detailed study of Ni-doped Mg(0 0 0 1) surface performed by PAW method and the gradient corrected density functional GGA-PBE within the framework of generalized Kohn-Sham density functional theory (DFT) is presented in this work. Structural and electronic properties of magnesium surface interaction with nickel for the purpose of such compounds use for creation of hydrogen storage matrixes were investigated here. Choice of the PBE functional was caused by the good accordance of its prediction of the cell parameters with experimental results. It was shown that Ni atoms prefer to substitute for Mg atoms. Using NEB method, the diffusion barrier was calculated, and the most probable reaction path was established. In particular, when the Ni atom dopes the magnesium surface, it can migrate to the bulk and substitute for Mg in subsurface layers. Also a possibility of nickel cluster formation on clean surface of magnesium was examined. The kinetic factors hinder the movement of the nickel atoms to each other and make problematic the formation of clusters. The studies presented here showed that the diffusion barriers of the nickel atom migration from the cluster on the surface to the bulk of magnesium are 1.179 eV and 1.211 eV for the forward and reverse reactions, respectively. Therefore an improvement of the hydrogenation properties of Ni-doped magnesium surface depends on deposition not of the individual atoms, but their clusters. Hydrogenation of Ni cluster doping the magnesium surface was investigated. Initially Kubas complexes arise on the Ni cluster with hydrogen-hydrogen bond lengths equal to 0.80-0.87 Å. Next the cluster needs to be saturated by hydrogen atoms to allow them later to migrate from cluster to magnesium. © 2014 Elsevier B.V. All rights reserved.


Komogortsev S.V.,Siberian State Technological University | Varnakov S.N.,Siberian State Aerospace University | Satsuk S.A.,RAS Kirensky Institute of Physics | Yakovlev I.A.,RAS Kirensky Institute of Physics | Ovchinnikov S.G.,Siberian State Aerospace University
Journal of Magnetism and Magnetic Materials | Year: 2014

The magnetic anisotropy of 10 nm iron films deposited in an ultra high vacuum on the Si(001) surface and on the Si(001) over caped by 1.5 nm layer of SiO2 was investigated. There is in-plane uniaxial magnetic anisotropy caused by oblique sputtering in the Fe films on a SiO2 buffer layer. The easy magnetization axis is always normal to the atomic flux direction but the value of the anisotropy field is different depending on the axial angle among sputtering direction and the substrate crystallographic axes. It is argued that the uniaxial magnetic anisotropy results from elongated surface roughness formation during film deposition. Several easy magnetization axes are found in Fe/Si(001) film without the SiO2 buffer layer. The mutual orientation of the main easy axes and Si crystallographic axes indicates that there is epitaxial growth of Fe/Si(001) film with the following orientation relative to the substrate: Fe[100] ∥Si[110]. The anisotropy energy of Fe/Si(001) film is estimated by simulation of angle dependence of remnant magnetization m r as the sum of the mr angle plot from uniaxial anisotropy (induced by oblique deposition) and the polar plot from biaxial magnetocrystalline anisotropy. © 2013 Elsevier B.V.


Kovalev I.V.,Siberian State Aerospace University | Badanina J.O.,Siberian State Technological University
IOP Conference Series: Materials Science and Engineering | Year: 2016

Considered Design and the logic of opening large convertible antenna. The necessity of compensation weight component in the assembly and testing of the design. Given the logic of the movement elements of power spokes, concluded that the use of the tracking system to compensate for the weight component. The analysis of the existing equipment and control systems. Produced selection of the manufacturer of automated equipment that meets the stated objectives of management and control. It is concluded that the design component of the weight compensation system based on servo controllers and sensors combined platform automation, controlled by special software. The structure of the platform automation, consistent workflow testing. It defines the principles of interaction between subsystems of the weight compensation component for receiving, processing and monitoring of process parameters testing. It is concluded that the proposed system can be integrated into the automation system and the perspective of process control testing of disclosure of large spacecraft. © Published under licence by IOP Publishing Ltd.


Vinogradova I.S.,Siberian State Technological University | Falaleev O.V.,Russian Academy of Sciences
Russian Journal of Developmental Biology | Year: 2012

1H magnetic resonance microtomography imaging was applied to study vascular systems in developing bean (Phaseolus limensis L.) seeds. Using the gradient echo method, we recorded 2D tomographic sections in the sagittal and axial planes of the fruits sampled from a vegetating plant on days 10, 17, 24, and 31 after fertilization. Any vascular connection between the tissues of maternal plant (bean pod and seed coat) and the embryo were undetectable. The embryo has an autonomous branched network of procambial strands in the cotyledons, converging to the embryonic axis. The bean pods are covered with a network of vascular bundles; large vascular strands run along the dorsal and ventral sutures. The seed coat vascular bundles are formed in the process of seed ripening and are represented by a developed vascular system multiply branching in the middle part of the ground parenchyma at the stage of physiological maturity. They are connected with the source of assimilates via the lateral pod veins and a large vascular bundle, entering the seed below the hilum via the placenta. Assimilates enter the external part of the seed coat, which contains no vascular bundles, via the funiculus vascular bundles and hilum tissue. © 2012 Pleiades Publishing, Ltd.


Ivanova G.A.,Russian Academy of Sciences | Ivanov V.A.,Siberian State Technological University | Kukavskaya E.A.,Russian Academy of Sciences | Soja A.J.,NASA
Environmental Research Letters | Year: 2010

Forest fires resulting from long periods of drought cause extensive forest ecosystem destruction and can impact on the carbon balance and air quality and feed back to the climate system, regionally and globally. Past fire frequency is reconstructed for Tuvan Scots pine stands using dendrochronology and statistics. Central Tuvan Scots pine (Pinus sylvestris) stands are subject to annual fire regimes; however high intensity fires are rare but they are responsible for most of the damage. Low, medium, and high severity fires have shaped the multi-story Scots pine communities, locally and regionally. Fire type and frequency are directly related to weather and climate and are also dependent on anthropogenic influences. The primary dry period, which promotes fire ignition and spread, in Tuva occurs in April and May. In some years, the precipitation deficit combined with high air temperatures induces long periods of drought. Unlike the typical surface fire regime, forest fires that burn during these extreme droughts often become crown fires that result in substantial forest damage and carbon release. The mean fire interval (MFI) is found to be 10.4 years in Balgazyn stands, and the landscape-scale MFI is 22.4 years. High severity, stand-replacing crown fires have a longer MFI. The warmer and dryer weather that is predicted by global climate models is evident in Tuva, and we believe that these changes in weather and climate have resulted in increased fire intensity and severity, rather than fire frequency in the Tuvan region. © 2010 IOP Publishing Ltd.


Zhimbueva L.D.,Siberian State Technological University
Computer Optics | Year: 2011

The article describes the method for determining the total distortion of digital images. The algorithm for the solution of the problem is developed and consists of the following steps: (i) creating the ideal image of test object according to its real image, (ii) construction of the image distortion vector diagram, (iii) nonlinear regression analysis of the approximable functions, (iv) solution of the interpolation problem, object image correction and object plane contour reconstruction. The square grid is used as a test object. The mathematical model of the image distortion is built using the Nonlinear estimation package of the STATISTICA system. The reliability value of the investigated function approximation is 0.98-0.99 with cubic polynomial applied. The developed method makes it possible to improve the object plane contour reconstruction accuracy. The method may be used in COMPUTER VISION SYSTEMS in intellectual robot-technical systems, pattern recognition etc. © 2011, Institution of Russian Academy of Sciences. All rights reserved.


As a result of a phytopathological investigation into birch (Betula pendula) stands in the Krasnoyarsk group of areas (south of Middle Siberia), newly appearing and existing nidi of bacterial dropsy have been discovered. The influence of growth conditions on morbid affection in birch forests and the correlation between disease prevalence and characteristics of forest inventory have been established. The specificities of tree affection within phytocenoses and the influence of disease on the sanitary state of birch forests have been discussed. © 2014 Pleiades Publishing, Ltd.


Baranov A.M.,Siberian State Technological University
Gravitation and Cosmology | Year: 2012

An approach to construction of static models is demonstrated for a fluid ball. Five examples are considered. Two of them are exact solutions of the Einstein equations; the other three are connected with the Airy special functions, the hypergeometric functions and the Heun functions. © 2012 Pleiades Publishing, Ltd.


Nechaev A.I.,Siberian State Technological University
Russian Engineering Research | Year: 2014

The gear ratio of planetary mechanisms with two central gears and a double satellite is nonuniform. © 2014 Allerton Press, Inc.

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