×

You are using an outdated browser Internet Explorer. It does not support some functions of the site.

Recommend that you install one of the following browsers: Firefox, Opera or Chrome.

Contacts:

+7 961 270-60-01
ivdon3@bk.ru

  • Electronic structure and magnetic properties of quasi-2D systems MeO (Me = Mn, Fe, Co, Ni) in ferromagnetic ordering

    Band structure calculations were performed for quasi-2D MeO systems using the pseudopotential method within density functional theory. The calculations were carried out within the plane waves methodology using pseudopotentials. Density of electron states was calculated within the approxination of collinear magnetism. We examined the electron structure and estimated the electronic and magnetic properties of FM-ordered quasi-2D MeO systems (Me = Mn, Fe, Co, Ni). It has been demonstrated that the MnO - FeO - CoO - NiO row exhibits a shift in 3d spin down states of the metal relatively to the Fermi level towards the low-energy region. The above affects magnetization in 2D systems of oxides of 3d transition metals. The character of electron density distribution in quasi-2D MeO systems (Me = Mn, Fe, Co, Ni) indicates ionic bond type between the atoms in Me systems. The tendency towards increase of the band gap in the FeO→ CoO→ NiO row has been established. The obtained estimates of the local magnetic moment of a 3d transition metal atom in crystals of examined oxides correlate with experimental data. In conformity with existing views in physics, we have revealed the effect of spontaneous spin polarization of Me 3d and 2p bands of oxygen atoms in quasi-2D MeO systems (Me = Mn, Fe, Co, Ni), which in our opinion plays the main role in generation of magnetic moments in the atoms of 3d transition metal and oxygen.

    Keywords: Density functional theory, pseudopotential mathod, ferromagnetism, electronic band structure, transition metal oxides

  • Applications of graph theory in the intellectual techniques of social media analysis for monitoring of candidates popularity during elections period.

    We analyze social network graph to identify popularity distribution between ukrainian presidential candidates during elections period. In the first part of the paper we descibe 2 graph layouts: candidates in-degree and bloggers in-degree. It is stated, that with the help of such data mining one can answer community-centric questions: community clusters, that mention same candidates, structure of such mentions, particular bloggers, that mention particular candidates.

    Keywords: social network graph, data mining, big data, opinions graph, presidential candidates, graph theory, social network analysis

  • The use of a multi-segment model of the spatial characteristics of the transformation to improve the accuracy of measurements hot-wire gauges liquid flow rate

    To achieve high accuracy of measurement of liquid flow rate using the hot-wire gauges are encouraged to use multi-segment method of spatial characteristics of the transformation. The method is based on the nonlinear three-dimensional elements. Model the spatial characteristics of the transformation is maximally adapted to the peculiarities of the conversion function of the primary transmitter. Model repeats its spatial form with the non-linearity, zero drift, the influence of external factors, including temperature. This provides a low error rate calculation of flow. Study of the effectiveness of the method was based on experimental data obtained during the calibration at different temperatures. Maximum reduced measurement error does not exceed ~ 0.45% at an arbitrary temperature, recorded during measurement.

    Keywords: thermoanemometric meter spatial multi segment conversion characteristic, the error rate of fluid flow, the approximation method of least squares

  • Changes in the structure of the magnetic field MPFS TWT by external corrective action

    This article describes new method of correction of magnetic field MPFS TWT. The method allows controlling the magnetic induction instead of the current coefficient of retarding system. This approach reduces time and increases quality of correction. The key point of the method is in controlling of magnetic field on the assembly stage. The iteration algorithm of correction was developed. It is necessary to remember the coordination of the point, which need to be corrected. After measurement the researcher will know the result of influence of correction, which he or she applies to the system. In such way all magnetic system need to be controlled. This article represents the result of this approach and shows its benefits and lacks.

    Keywords: periodic magnetic focusing system, a traveling wave tube, the magnetic field, the electron beam

  • Increase of efficiency of removal of trees and shrubs in a continuous movement of forest machines

    The article is devoted to the problem of improving the efficiency of removal of trees and shrubs (cutting and milling) in a continuous movement of forest machines. Brush cutters with active and passive working elements, as well as specialized machines are used for cutting and milling trees and shrubs. These machines have a disadvantage. It is a low reliability in operation. A general layout scheme of machines for removal of trees and shrubs is offered in the article which allows minimizing this problem. The machine has two working bodies: a basic and an additional. The basic working body is for cutting trees and shrubs. The additional working body is for milling stumps and roots and also for mixing pieces of wood with soil.

    Keywords: Through workflow, timber industry, trees and shrubs, brush cutter, mower, machine for cutting trees and shrubs

  • The crack resistance of concrete structures as a function of the marginal elasticity of concrete

    The article considers the problem of determining the moment of cracking in flexible reinforced concrete structures. It is shown that the stress at which cracks, significantly depend on the modulus of elasticity of concrete under tension, equal to the ratio of the elastic part of the deformation to the limit of elasticity of concrete.

    Keywords: diversification of management, production diversification, financial and economic purposes of a diversification, technological purposes of ensuring flexibility of production

  • Value-semantic aspects of professional health

    The article gives the analysis of the spiritual - existential and value-semantic problems of the psychology in professional health. The conditions of modern psychology of professional health is described already despite the fact that spiritual - valuable questions are not a subject of the majority of researching yet. But the obvious trend in this direction is observed now. There are five points in a vein of what the problems value approaches in psychology of professional health are allocated now. It is shown, that these themes are not represented exhaustively by well known psychologies of health resources of value -semantic levels of health. In conclusion it brings to expansion of a spiritual - moral problem to be the basic context of consideration problems in psychology of professional health and it can become the fruitful approach allowing more effectively optimizing a state of health of professionals to make it possible their personal growing on.

    Keywords: psychology of health, psychology of professional health, value, senses, spiritual health, an existential problem, moral consciousness of the professional, professional identity, professional growing, resources of spiritual health, organizational stress.

  • Monolithic flooring based on reactive oligomers

    Development of new industries, especially in the chemical, petrochemical, electronics, mechanical engineering industries and nuclear power, put forward the need for flooring with a specific chemical resistance, with minimal sorption in mild decontamination; significantly increased the need for dust-free floor coverings. The paper defines the requirements for materials for solid flooring; take into account the specifics of the polymer cements and mortars in the floor construction, as well as lists developed after various formulations for flooring.

    Keywords: solid flooring, reactive oligomers, stress, strain, composition for flooring.

  • Progress in elaboration of nonisocyanate polyurethanes based on cyclic carbonates

    In the article is given a review on production and application nonisocyanate polyurethanes based on cyclic carbonate oligomers. Nonisocyanate polyurethane (NIPU) networks are obtained by reaction between the polycyclic carbonate oligomers and aliphatic or cycloaliphatic polyamines with primary amino groups. This forms a crosslinked polymer with β-hydroxyurethane groups of different structure – polyhydroxyurethane polymer. Considered as a proper NIPU and hybrid polymers, involving various other oligomeric systems (HNIPU). Significant attention was paid to the materials based on renewable raw materials.The authors give an overview of recent publications in the field with a more detailed description of the Polymate Ltd. achievements.

    Keywords: nonisocyanate polyurethanes, cyclic carbonates, polyhydroxyurethane polymer.

  • Education as a social institution and a cultural phenomenon: social and cultural analysis

    In this article, the author refers to the socio-cultural study of the educational system, considering it in the institutional and systemic aspects. The author focuses on the many aspects of the concept of "education." According to the author, the complexity of the essential and functional characteristics of education implies the need for an integrated approach in its study, and allows us to consider education as a social institution and as a social and cultural phenomenon. The author refers to the analysis of the various stages in the development of the education system, formulating a conclusion about the need to bring the institutional characteristics of the education system in line with the demands and challenges of modern society. Emphasizes the importance of information and communication technology, connectedness modern education system, which also requires an adjustment of the existing approaches to the study of the phenomenon of education.

    Keywords: education, social institution, society, innovation, information

  • Model and method for automated parameterization the design of products with complex shapes

    We consider the model parameterization and methods for automated design of products with complex shapes for example product design shoe industry, allowing to reduce the costs and complexity proizvodstva.Privedeny practical results of the use of technology model parameterization of women's shoes, the use of which allows you to quickly receive the product model of the desired size of the order and color.

    Keywords: three-dimensional model, computer-aided design, shoes, parameterization, complex geometry, polygonal surface

  • The innovative potential of higher education in the field of urban planning

    This article analyzes the concept of "innovation potential" for educational institutions that produce professional training in the field of urban planning and engineering sciences. In modern Russian research practice the phenomenon of "innovation potential" is primarily considered in the context of economics. The author made the first attempt to define the innovative potential for the system of professional education through a detailed analysis of the specificity of the education. In this case, the innovation potential of educational institution is considered as part of the system: “an innovative climate - innovation activity - innovation potential” (determined for each institution separately). On the basis of the key features of urban development activities, which were the result of generalizations relevant Russian studies, a critical component of ensuring innovation is defined "innovation climate". As tools to support it proposed: the development of "horizontal" and "vertical" links between educational institutions, the formation of educational, professional and virtual clusters.

    Keywords: urban planning education, innovation potential, innovative climate, educational cluster, professional cluster, virtual educational cluster

  • Modern methods of dealing with filtration in irrigation systems

    The article presents data on the coefficient of performance (COP) of the existing irrigation systems, data on losses from irrigation channels and the distribution of their filtration. Examines the implications, fuss-tic at lower efficiency and as a result, filtration of water from irrigation canals-systems. A number of measures to reduce the loss of water through seepage from irrigation canals, including: maintenance, engineering and design activities.

    Keywords: Filtration, irrigation system, coefficient of performance, protivofiltratcionnye activities, covering, cladding, screens, geosynthetics

  • The main moment of forces of resistance in the gasdynamic bearing with spiral flutes

    In this article the author considers the gasdynamic bearing with the spiral flutes which active zone is formed by two close located firm surfaces, on one of which spiral microflutes are executed. The oblique-angled system of coordinates consisting of logarithmic spirals and circles is entered. For each dyad a flute crossing point values of powers of viscous friction were received and further their main moment of resistance concerning a bearing axis is calculated, expression for the main moment of forces of resistance is found in a smooth layer. In work the algorithm, allowing to calculate the main moment of powers of the viscous friction developing in a lubricant layer of the gasdynamic bearing with spiral flutes is received.

    Keywords: gasdynamic bearing, spiral flutes, oblique-angled coordinates, resistance moment

  • Problems of integration of wind power in the unified energy system of Russia

    The article discusses the innovative technology of increasing energy efficiency of wind power station. Also addresses the issue of stabilization of wind generator power at variable wind velocity. The key idea of research consists in reduce losses in the system of generation (quick-response induction machine) and power conversion (voltage source converter) obtained from the wind turbine. Control system was developed for wind turbine, consisting of two control loops: pitch control and direct torque control. Using of direct torque control system of the quick-response induction machine moment is offered for stabilization of wind generator output power. At the same time, the pitch control of the blades wind turbine used to restrict the allowable range for the generated power. Proposed control system allows to increase the production of the power generated by the wind turbine.

    Keywords: wind power systems, wind turbines, quick-response induction machine, horizontal axis wind turbine, direct torque control, voltage source converter, high voltage direct current

  • Sociological analysis of the factors modelling physical and emotional health aspects of contemporary student youth of Southern federal university

    Nowadays many researches devoted to the problem of health of the individual, have become of a major significance. Scientific interest is high as there are many challenges and risks contemporary individuals face. Today we come across many publications where the health phenomenon is being analyzed from different perspectives. Questions of health are the subject of interdisciplinary research as a plenty of different sciences are involved into all levels, say, theoretical and applied. This article is some systematization of the results of two applied researches of 2014 in the frames of Southern federal university, Rostov-on-Don, Russian Federation. The main aim of the researches was to determine and describe the basic content of physical and emotional so called components of health of contemporary student youth and factors determining them. We questioned 232 students. Resuming some results we can say that because of contemporary needs of the society students have to put getting good education and career escalation as the main priorities in their life. They also worry about problems of ecology and health. In particular smoking and alcohol drinking. Our results again coincide with the results of other researchers that there is no gender difference here: both young women and men tend to smoke and drink alcohol – girls practice “men’s behavior pattern”. Students are stressed and that is the main reason of their drinking. They underline determination of some social factors, as political situation, changes in the Russian society, etc. Sociologists are expected to research mentioned problematic field more thoroughly.

    Keywords: youth, student, health, physical aspect, emotional aspect, social aspect, health determinant, behavior model

  • Conceptual modeling of basic tasks of a cultural infrastructure

    The article deals with the basic tasks of infrastructure cultural complex. According to the results of the analysis proposed a conceptual model of the basic tasks of cultural infrastructure for further study using integrated simulation.

    Keywords: Culture, cultural complex, conceptual modelling, uml-diagrams

  • Dynamics of the North Caucasian diasporas in the regions and territories of the South of Russia - size, geography, the potential of conflict (current trends)

    The article analyzes the demographic dynamics and settlement communities in the North Caucasus regions and territories of the South of Russia in the post-Soviet period. Fixed basic forms, directions and scope of migration, as well as gender and age structure of some communities. Understands the complexity of the interaction of host South Russian ethno-cultural communities and the North Caucasian diaspora, explores the peculiarities of "Slav-North Caucasus" etnokonfliktnogo capacity in urban areas and rural regions of the South of Russia. Outlines possible prospects of development of the North Caucasian communities within the "Russian dance" South macro-region

    Keywords: North Caucasian diaspora, South Russia, population distribution strategies, migration activity,ethnocentric potential

  • Sociographic measurement of cultural leisure young people in Rostov-on-Don

    This scientific research is directed on measurement of level of satisfaction of students with a cultural and leisure complex of Rostov-on-Don, ability of cultural infrastructure to sustain inquiries of the population, and reveals the problematic side of the existing cultural complex. Research took place from December, 2013 to May, 2014 by a questioning method. It's received low level of satisfaction with the functioning of the cultural complex among young people. Revealed a low level of interest of the population in their cultural development. It is shown that the existing cultural infrastructure is not able to fully perform their functions of the cultural development of the population and neeeds to change.

    Keywords: cultural complex, sociographic measurement, questionnaires, descriptive statistics, cultural infrastructure, cultural level of the population, leisure

  • Dynamics of the largest regional diasporas, as an indicator of the ethnic and demographic evolution of the population of the Rostov region

    The article analyzes the population dynamics, habitat settlement in the Rostov region of Ukrainians and Armenians, representing two major regional diaspora. We study their complex demographic and spatial relationship in the post-war decades, and in the post-Soviet period. The reasons rapidly declining regional Ukrainian community in the late twentieth century - beginning of the XXI century. Predicted the most likely scenario, the demographic dynamics of the two diasporas in the coming decades, examines the role in this process of modern Ukrainian crisis caused by the influx within the scope of large numbers of refugees.

    Keywords: Ukrainians and Armenians, regional communities, and the number of resettlement, ethno-cultural structure of the Diaspora

  • Methodology for monitoring perception of the cultural complex

    Substantiated the technique of monitoring the state of the cultural complex of the city or the subject of the Russian Federation, based on sentinel populations. The study was conducted among the students of the 2nd year RGSU. As an integral indicator of the development of the cultural complex and the its individual components, use one of the cultural components of the group setting - the level of emotional perception of the relevant components. Normalized between -1 (total rejection) to 1 (absolute satisfaction). Primary data obtained questionnaires, one of projective techniques - by Charles Osgood's semantic differential. Interpretation of the results carried out on the basis of the theory of perception Information respondent suggested Coombs - ideal point model. Levels of perception are calculated in the linear approximation, as well as in the non-linear model, which we developed based on the concept of typicality, in terms of the theory of catastrophes. In contrast to the conventional approach of technology of semantic differential, calculations are performed not by the average semantic portraits, and by individual, using multi-agent modeling package Any Logic. Ultimately, calculated the distribution of function level of emotional perception of infrastructure and cultural life of the city as a whole on respondents. It is shown that the distribution function of the level of emotional perception of cultural infrastructure and cultural level of the city as a whole is almost the same. It was found that the emotional perception of the students strongly smeared cultural infrastructure, from strongly negative (-1) to a significant positive (+0.8). The main result - shows prospect the offered technique for assessment of development of the cultural infrastructure of the city as a whole, and for the analysis of cultural deprivation separate groups of the population.

    Keywords: monitoring, cultural infrastructure, cultural level of the city life, cultural attitudes, emotional level of perception, semantic differential, projective techniques, nonlinear model, ideal point, catastrophe theory, typicality

  • Management of production systems under conditions of uncertainty: a regional perspective

    The uncertainty is investigated and regularities of their impact on production systems, taking into account the search management strategies. It is proved, that uncertainty is a parameter that accompanies any productive activity for the period of the projection; due to a number of laws (integrativnost′û, integrity, communication, hierarchical structure, osuŝestvlâemost′û, etc.); is based on two basic scenarios: conservative and innovation Are key factors of uncertainty. (information, bureaucratic, change the value of the currency, sanctions, stagnation and so on) in the development of targeted corrective measures on projected periods.

    Keywords: Uncertainty and their patterns, parameters, key factors of production systems management, corrective actions