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  • Information-measuring system of input control and quality analysis of components

    To ensure the correct and continuous operation of all electronic devices, it is necessary that all components of these devices correspond to their declared characteristics. In this article, an information-measuring system for incoming control and analysis of the quality of components is being developed. Structural and functional diagrams of the system were developed. A natural experiment was carried out.

    Keywords: information-measuring system, input control, quality analysis, components

  • Digital weather station with measurement of geomagnetic field parameters

    This article discusses the development of a digital weather station with the measurement of geomagnetic field parameters. The advantage of the developed device is the possibility of simultaneous stable and correct operation of several sensors (namely 15), measurement accuracy at long distances (up to 300 meters). Structural and functional diagrams of the device have been developed. The voltage regulator of the device is designed in the Micro-Cap circuit analysis program. Experimental studies of the finished device were carried out.

    Keywords: digital weather station, geomagnetic field, magnetic sensor, Arduino

  • The algorythm of building of dissymmetric bigram cryptosystem,based on diophantine difficulty

    The objective need to improve information security systems in the conditions of information-telecommunication technologies developing is shown. A new area of NP-complete promplems of diophantine analisys is firstly researched, namely Tarry–Escott multigrade diophantine equation systems (MDES) of given dimension and degree. The theorems, that describe parametrical MDES parametric solution properties, required for the development of the algorythm of building of dissymmetric bigram cryptosystem, are given in the article. The author's theorem, which allows to develop information protection system (IPS) mathematical model as a cortege, containing diophantine probleme. A new approach to develop dissymmetric bigram cryptosystem(DBC) on the base of two-parametrical MDES solution, which generalize open key cryptosystem, is considered. Forward and reverse conversions based on parametrical solution are suggested tyo realize on such algorythm. A new concept of equivalence of ordered sets of numbers (parameters) of a given dimension and order is introduced to build DBC mathematical model, using two-parametrical MDES solution. Described mathematical model demonstrates application potential of diophantine equations for IPS with a high degree of reliability.

    Keywords: NP-complete probleme, information protection system, symmetric (dissymmetric) cryptosystem, open key cryptosystem, forward and reverse information conversions, Tarry–Escott multigrade diophantine equation system, parametrical solution

  • Improvement of transportation of building structures

    The question of improvement of transportation of building structures and products is considered. The possibility of reducing losses is studied. Measures to prevent the destruction of semi-finished products during their transportation are proposed

    Keywords: organization of construction; economy of construction; organization of production

  • Engineering open public forum "Rozmysly" model of open professional community

    The present publication continues the presentation of the results of the project of creation of Russia's first Engineering forum for scientific and technological activities, social and technological entrepreneurship "Rozmysly", developing the principles of open public interdisciplinary electronic environment. The development of new communication technologies in the framework of educational projects on the forum platform is revealed. Educational projects make it possible to involve in scientific engineering knowledge an even wider range of specialists-practitioners, research engineers, young scientists, applicants, graduate students, students by providing them with opportunities for remote participation in educational projects. It is shown that the basic advantage is achieved through the implementation of the principle of professional social network, which is a kind of interdisciplinary scientific and technological engineering forum.The project "Engineering open public forum of scientific and technological activities, social and technological entrepreneurship "Rozmysly" of the Rostov branch of the Russian engineering Academy is carried out using the grant of the President of the Russian Federation for the development of civil society, provided by the presidential grants Fund.

    Keywords: website, Internet platform, engineering forum, open access, training, foresight

  • “Rozmysly” public open engineering forum of scientific and technological activities, social and technological entrepreneurship

    The project for creation of the first in Russia Engineering Forum of scientific and technological activities, social and technological entrepreneurship “Rozmysly” is presented, this forum develops the principles of an open public interdisciplinary electronic environment. The substantiation of the social significance of the project is given. The new project implies involving an even wider range of practitioners, research engineers, young scientists, applicants, graduate students, students and even senior pupils in scientific engineering knowledge by providing them with the opportunity to publish, read and discuss the results of promising research and development works, engineering solutions, inventions and rationalization or innovative proposals in the form of an electronic preprint. Conceptually, the project represents a new culture of scientific publications based on global and mini Internet platforms. It is shown that the basic advantage is achieved through the implementation of an open access initiative. From the date of publication, the material is available for the widest possible range of readers. The project is a kind of an interdisciplinary scientific and technological engineering forum.

    Keywords: site, Internet platform, engineering forum and storage, open access, preprint, foresight

  • Simulation of thermal creep inhomogeneous thick-walled cylinder axisymmetric

    The complete cycle of flat axisymmetrical problem solving is given in this paper: from getting the main resolving equation to solving the practical problem of polymeric tube creepage. Two non-linear laws of “stress-deformation” union are used: Maxwell-Gurevich law and Maxwell-Tomson law. Camparison and analysis of the obtained data are given, as in some cases it is enough to use Maxwell-Tomson equation than to use more complex Maxwell-Gurevich union equation. Solving of the problem is given with the use of numerical method – finite difference method. In the case of the temperature field, all physical-mechanical parameters of the material (elastic and relaxation) are taken as the temperature function. Thees, the non-uniformity of the material is considered. To determine the temperature field Furje heat transfer equation is used.

    Keywords: axisymmetrical problem, non-uniformity, creepage, Maxwell-Gurevich union equation, Maxwell-Tomson union equation

  • Calculation of reinforced concrete arch with the creep of concrete

    The article presents basic equations for reinforced concrete elements that are experiencing bending moment and axial force, taking into account the creep of concrete. The stress-strain state of reinforced concrete statically determinate three–hinged arch is investigated on the basis of these equations. Also for this task we gained the resolving equations of finite element method and compared the numerical-analytical calculation with the numerical performed using the finite element method to the arch loaded with a uniformly distributed load and having the shape of a circular arc. The calculations used viscoelastic model, according to which the total deformation is the sum of concrete elastic deformation and creep. We consider a rectangular cross section with symmetrical reinforcement. It is shown that because of creep stress redistribution between concrete and reinforcement arises.

    Keywords: finite element method, the creep of concrete, viscoelasticity, reinforced concrete arch, the stress–strain state.

  • Determination of long-term critical loads for compressed polymer rods with nonlinear creep

    The article provides information about method of sustainability calculation of compressed polymer rods taking into account nonlinear creep . As the law of the relationship between stress and strain is used nonlinear equation of Maxwell-Gurevich. Derived from the analysis of the resolving equations with time tends to infinity, we obtain an expression for a long critical force in the case of constant rigidity of the rod.

    Keywords: nonlinear creep, rod, stability, Maxwell-Gurevich, finite difference method, long critical force, relaxation viscosity, viscoelasticity, high elasticity modulus.

  • Plane strain condition polymer of the cylinder in terms of thermoviscoplastic

    The resolving equations for determining stress-strain state of thick-walled polymeric cylindrical shell under plane strain state with changes in temperature and highly elastic strains. Into law that describes the relation between stress and creep strain, the nonlinear equation of Maxwell-Gurevich. The solution is performed numerically using the finite element method.

    Keywords: nonlinear creep, plastic cylinder, highly elastic deformation, the equation of Maxwell-Gurevich, finite element method, viscoelasticity, modulus of viscoelasticity, plane strain state, temperature.

  • The structure of group installations the politically active part of the population of the Rostov region (according to 2014).

    Work represents research of structure of group installations in relation to a political order. The studied audience - politically active part of the population of the Rostov region. Measurement is carried out using questionnaires. The survey involved 402 respondents. Age from 19 to 73 years. It is measured an activity relation to the political life of society, there is assessment of relations to the political authority, the current political situation and the level of relative deprivation. It is received, among the interrogated group there are pro-government moods, with support of work in the government, for the purpose of support to the existing regime – 44,8%. It is revealed, the majority of respondents have a negative attitude to the protest actions. Thus the increased level of an emotional involvement and participation in political processes is observed.

    Keywords: a political tension, deprivation, group installation, cognitive component, behavioral component, questionnaire, the descriptive statistics

  • Stability of linear delay-differential equation of milling process

    A stability problem of milling process is under consideration. A novel analytical tool is presented to assess the optimal cutting parameters which provide a chatter free machining. Chatter instability is broadly studied in the literature. However, the problem of simultaneous optimization of radial and axial depths of cut is kept out of scope. To describe the optimization method a single-degree-of-freedom model of milling process is investigated as well as corresponding equation of motion and function of cutting force. A unified delay-differential equation is proposed. A theorem of asymptotic stability is suggested. Suggested optimization technique allows to create a diagram of radial and axial depth-of-cut dependence.  As shown, there exists an extremum of function of axial and radial depth-of-cut dependence.  

    Keywords: chatter, stability, delay-differential equation, oscilations, self-excited vibrations, optimization

  • Technologies of modeling socio-cultural interactions in multi-ethnic regions

    Presents materials of the reports presented at the section "Technologies of modeling socio-cultural interactions in multi-ethnic regions" international scientific conference of young scientists "Actual problems of modeling, designing and forecasting of social and political processes in multicultural space of modern society". The organizer of the specified partition conference was organized by the North-Caucasian scientific center of higher school and the Department of modeling of social processes of the southern Federal University. The materials reflect the results of research of young scientists, postgraduates and undergraduates, obtained with the use of various aspects of model-based approach.

    Keywords: Technology, modeling, social modeling, socio-cultural interaction,multi-ethnic region

  • RGSU students relation to political life at the end of 2013

    The work is aimed at studying the relationship of young people to the political sphere of society. Research was carried out the end of 2013 using questionnaires. In the survey of 185 people attended. There is a low level of participation in the political process, and the average level of emotional involvement. It is received, the low level of political activity of young people: weak electoral activity and indifference to social movements. Assessment of the political situation on the value of the average in the Region - 2.39 and Russia - 2.04.

    Keywords: a political tension, deprivation, group installation, cognitive component, behavioral component, questionnaire, the descriptive statistics

  • Cognitive and behavioural components of the relations to the political order of students of DGTU (according to 2013)

    The article examines the cognitive and behavioral components of group attitudes toward political order of students of DGTU.  Pilot study took place in 2013 and was carried out using questionnaires, which was attended by 52 people. The analysis represents a hierarchical clustering on the basis of consecutive factorization. It is received, group level of a relative deprivation – 0,46. In assessing deprivation group decomposed into two subgroups, with average values in each - 0.3 and 0.6. Perceptions of political order at the cognitive level:  -0,174 for local government and-0,139 for Russia. In perception of local government the group broke into two subgroups: -0,3 and 0,2. Behavioral component perception of political order defined by two subfactor: active behavioral level - 0.39, and the estimated level of oppositional behavior - 0.57.

    Keywords: group settings, the affective component, a behavioral component, cognitive component, relative deprivation, questioning, political attitudes, factor analysis