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  • Change of the mechanism of sintering powders piezomaterials as a way of reducing the temperature of formation of dense ceramic frameworks

    The problem of manufacturing technology heterostructures pezofaza - metal considered in the article. Complexity consists in the fact that during the removal of the polymer in the system at low temperatures are formed porous layers, formed powders separated metal layers, having island macrostructure. One way to solve the problem - reducing the firing temperature heterostructures. Proposed to decrease the sintering temperature by using of functionally active glass-phases. Reducing the sintering temperature of products also allows to replace platinum electrodes inexpensive silver-based alloys. Obtained by solid state reaction method of piezoceramic material has a low sintering temperature (980 ° C) and high electrical parameters. Found that not only the proportion of the vitreous mass, but also their qualitative influence on the properties of piezomaterials    

    Keywords: heterostructure glass phase, the sintering temperature, porosity, ferroelectric phase

  • Economic interests of big business in the conditions of a single Eurasian space

    In the context of updating the formation of a common Eurasian space is particularly important to study the problem of realization of economic interests of economic entities operating within the system of relationships. Same interests of big business, in this case, play a special role , as it is large business structures , acting as actors of economic activity, are able to set new trends in the development of the economic environment , having sufficient capacity to be able to influence decision- government authorities of administrative decisions. Formation and development of a common Eurasian economic space requires the definition of " growth points" further relations between the states to set foot on the path of integration, and that the organizational form of big business can become a support for building a new system of economic relations. Integration processes in Eurasia based not only on increasing trade between the member countries of integration, but also on their complementarities , formed naturally as a result of centuries of economic cooperation and based on the economic interests of the largest multinational corporations or associations like them , specifying the vector of development of a single economic space. In turn, this single economic space opens up new possibilities for the realization of the economic interests of economic entities , especially for major actors in national economies. This article discusses the main directions of the interests of big business, represented by transnational corporations in the new economic conditions .

    Keywords: integration, a single Eurasian space, economic interests, foreign direct investment, multinational corporations.

  • Hybrid reverberation algorithm

    A hybrid reverberation algorithm is offered in this article. This algorithm is using both a convolution section in which a convolution with an inmpulse response of a real acoustic room is being implied and a mathematical reverb model. Also an algorithm for generating impulse responses of optional rooms is also offered in the following article. The algorithm efficiency calculation is  specified in the article. Thia reverberation algorithm is a part of a bigger complez auralization algorithm where it is being used coherently with an HRTF-based algorithm in order to simulate a real acoustic environment  

    Keywords: artificial reverb, room simulation, convolution algorithm, impulse response convolution, impulse response synthesis, dynamic convolution, complex filtering

  • Automatic device for analysis the nonlinear parameters of HTSC ceramics YBa2Cu3O7-x in variable magnetic fields.

    Considered part of the software and hardware designed and manufactured the device for the automatic analysis of nonlinear parameters of high-temperature superconducting ceramics YBa2Cu3O7-x in variable magnetic fields. Shows the calibration and specifications. The new is a synchronous (the error in determining the phase of no more than 0.5%) of digital signal samples of the nonlinear response of the sample and the samples generated by an external magnetic field (the error is less than 1%), with the number of data samples per channel to 90 ∙ 106 12-bit samples and sampling 600 ∙ 103 samples per second. The reference range of variable magnetic fields 1 - 50 Oe, a frequency range of 1 - 50 kHz in steps of 1 Hz and the accuracy of 0.0291 Hz. The device has an interface to the computer via two USB-interface and original software to work with it. With the use of the device, a series of experiments designed to produce some non-linear parameters of cylindrical sample made of high-Tc ceramic YBa2Cu3O7-x. The analysis of the results and their comparison with the presented in the literature  

    Keywords: Nonlinear medium, high-temperature superconducting ceramics, synchronous samples, harmonics, ARM-9 CPU, a differential sensor.

  • Influence of the manganese nitrate surface phenomena characteristics on impregnating tantalum capacitor anode

    The influence of manganese nitrate impregnating solutions concentration and temperature dynamic viscosity, the wetting angle, interface “porous tantalum electrode - solution” free surface energy and the impregnation degree of porous tantalum anode was researched. A quantitative characteristic of manganese nitrate solution application on porous tantalum anode of solid-electrolyte capacitor during the process of impregnation was defined and work of adhesion and cohesion was calculated. Thus increasing of solution concentration above 42% wt brings to sharp growth of surface tension and so work of cohesion is increased but carriers impregnation is fallen. The most effective impregnation is realized at concentration 27% wt. This fact corresponds to best value of tantalum anode capacitor free surface energy. So using received data we are able to estimate optimal conditions of impregnation and wetting process by nitrate magnesium.  

    Keywords: manganese nitrate, manganese dioxide, limiting wetting angle, free surface energy

  • Model of application of system mimo for suppression of reflections from the surface of earth in the way beamforming

    Suppression of a signal reflected from the underlying surface is being performed for the cause of location of the low-lying objects. Since the spectral characteristics of the signal and noise match, spatial difference is formed by oblique irradiation. Spatial differences are allocated by the radiation pattern. The suppression is performed by forming the zero value in the equivalent radiation pattern. The equivalent radiation pattern is a section of a generalized ambiguity function of the signals. The graphs of equivalent diagrams are shown for several areas of suppression in the view sector. The adaptive system is performing the equivalent radiation pattern zero-value scan of the underlying surface in the view sector. These algorithms are successfully applied to the MIMO system. A feature of the MIMO system is spotted in the task of forming zero values of the equivalent radiation pattern.  

    Keywords: MIMO, underlying surface, ambiguity function, adaptive system, passive noise

  • Methods for the synthesis of LaMnO3 (Review)

    "This review covers various methods of synthesis LaMnO3 ferroics. The general analysis of the solid-phase synthesis reactions methods and wet methods (sol-gel, sorption, co-precipitation) are carred out. The original results of LaMnO3 syntheses from various precursors by means of the in situ method are showned. The advantages and disadvantages of different methods of synthesis are determined. The analysis of synthesis LaMnO3 ferroics published data is shown:
    - the structure formation of LaMnO3 in perovskite-type phases occurs at different temperatures, depending on precursors states;
    - LaMnO3 perovskite phases differ in symmetry and unit cells parameters at room temperature, depending on the preparation conditions;
    - the highest synthesis temperature of LaMnO3 are typical for solid phase reactions method (950-1050 ° C), the lowest - for wet synthesis methods (500-700 ° C);
     - the synthesis conditions effect the stoichiometry of LaMnO3 for oxygen content.
    Our studies of structure formation processes of LaMnO3 by in situ method are allowed to define the role of precursors states at synthesis of solid phase reactions methods, adsorption, co-precipitation and sol-gel mixtures.
    It is determined that in samples prepared by wet chemical methods, the formation processes of  LaMnO3 perovskite phases occur at lower temperatures than by solid phase reaction (sol-gel precursor - 500 <T <600 ° C; precursors obtained by coprecipitation and sorption methods - at 600 <T <700 ° C and 700 <T <800 ° C, respectively).  

    Keywords: ferroics, LaMnO3, X-ray diffraction, solid-phase synthesis, sol-gel synthesis, sorption, co-precipitation

  • The extent of the stress-strain diagram of eccentrically compressed concrete pillars

    On the basis of experimental data on the resistance of reinforced concrete columns eccentric compression was obtained analytical dependence of the limiting compressibility of concrete from the varied factors: the relative eccentricity of the external force eo / h and the reinforcement ratio μ.

    Keywords: reinforced concrete column, longitudinal reinforcement, a protective layer of concrete, finite element method, critical load

  • The choice of boundary conditions for the simulation of the temperature field of soil

    The existing methods of calculation of the annual change in soil temperature. Identified areas of their application and the possible deviations from reality. The requirements to the boundary conditions of the calculation. Defines the principles of the choice of initial conditions. The preconditions for the development of a universal method of calculation.

    Keywords: heat pump, renewable energy, solar radiation, transient mode, soil

  • Modeling technology changeover

    The paper examines the main approaches to the modeling of scientific and technical progress. Details the conditions and change the model postulates technological structure , its main provisions . Put tasks that are of great interest for scientists involved in the modeling of scientific and technological progress , and for economists who are interested in the practical application of these results . Values ​​of other well-known models of STP . The variants of modernization and the possible synthesis of these approaches to modeling change tehnologichekogo order.

    Keywords: scientific and technological progress, advanced technology, changing technological way of practical experience, the elasticity of factor capital

  • Institutional barriers to the development of Russian information market

    The paper discusses the features of the domestic market of information products. Discloses the main problems hindering its further growth. The basic directions of perfection of the Russian information market and focuses on the role of the state in its regulation. State, being the largest customer IT systems, their demand is, of course, has a significant impact on the positive dynamics of the information market, but the market is faced with a rather long-term problems: unreasonably high investment risk and insufficient funding. Obviously, under favorable trends in the global economy, these problems are solved in part by foreign investment, on the other hand, provides a gradual increase in the involvement of the Russian information market in the world.

    Keywords: information market, barriers, ways to improve, public policy

  • Simulation re-routing strategies for the CBD network of Rostov-on-Don.

    This paper presents the results obtained at simulation of various algorithms dynamic route guidance. A simulation experiments has been executed for the CBD network of Rostov-on-Don with using AIMSUN package. The main objectives of research are estimate routing strategy and relation between shape of the macroscopic fundamental diagram and traffic assignment on the network.

    Keywords: re-routing, rate, dynamic traffic assignment, traffic conditions

  • Estimation of efficiency of marketing research from the position of economic indicators

    In the article was discusses the problem of assessing the effectiveness of marketing research with the help of different methods; was done an attempt to identify the approaches to determining the effectiveness of marketing research based on their goals. Also was developed the formulas for quantitative evaluation of the effectiveness of marketing research.

    Keywords: the efficiency of marketing research, assessment of marketing researches, economic efficiency of marketing research

  • Computation re-routing rate and traffic conditions to dynamic traffic rerouting

    In the implementation of dynamic re-routing of traffic it is important to notice that the threshold depends on the network layout and type of the roads. Full paper includes appropriate relationships, figures and analysis of simulation results to define the re-routing rate of dynamic traffic reroutig

    Keywords: re-routing, rate, dynamic traffic assignment, traffic conditions

  • Preparation of a color system of the early twentieth century

    The article deals with the preparation of the leading schools of art of the early twentieth century in Germany and Russia. Determined the reasons for leaving between classical training and subsequent return to the system of art education to the academicism.

    Keywords: coloristics, art education, color, professional education