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  • Principles for the development of biopotential amplifiers and method of processing data on reactions

      The requirements to be met by a data acquisition system in terms of each of the problems to be solved. Presented electric concept developed biopotential amplifier with a total gain of 2000. The theoretical model of the spectrum of RR intervals and changes depending on the running processes. The analysis revealed that the resulting spectrum satisfies the conditions considered in the theoretical model, and can be further analyzed with fractal characteristics.

    Keywords: Instrumental amplifier, biopotential, fractal index

  • Stabilographic functional diagnostics in elite sports

      The purpose of investigation is to examine the effect of adaptation to difficult-house physical stress on the regulation of the vertical posture of man. For the analysis of the ability to maintain a vertical position used stabilographic hardware-software complex "Stabilan-1-02" (JSK Rhythm ", Russia). The ability to maintain a vertical position was evaluated in two static positions: 1) the main stand (OS) in the presence and absence of visual information, and 2) dip (PP) in the presence of visual information. Revealed that an increase of physical performance ability to maintain balance in static positions, especially in the complicated conditions (deprivation of visual information and static muscle tension) increases.

    Keywords: Sports stabilometry, adaptation, vertical pose

  • Diagnosis of psychophysiological and emotional state of the human operator

      Various non-invasive assessment of psycho-physiological and emotional state were analyzed: the fractal estimation of speech signals, the analysis of rhythmic EEG patterns and computer stabilometry. The results allowing  prediction of the transition of the individual in a particular state, were obtained and objective criteria for determining the individual personality as a specialist were identified.

    Keywords: Emotuonal speech, EEG pattern, attractor, suggestibility

  • Methods of measurement of small inductors for radio systems on a chip

    Technique for measurement of inductances (L) about 1 nanohenry or less one, is discussed. Two measurements of inductance L are executed. First one is executed for stub length l0, another - for stub length, shortened into N times. Formula for calculation of unknown inductance’ error has been obtained, where determination of unknown L with error closed to meter error has been succeeded by choice of parameters. It is shown that required measurement’s error of initial stub length for N=2 and N=5 is in tens micrometers’ range. Techniques for error’s diminishing have been considered. Estimation for basic stub length of 6,6 mm and 8,3 mm for N=2 and N=5 respectively has been executed. 

    Keywords: inductance, least-squares procedure, meter error, stub base

  • The concept of organization of processing of the information in the systems of diagnostics and detection

     In the article there are considered the problems arising in the building of systems of diagnostics and recognition, provides methods to detect deviations in functioning of the various objects.

    Keywords: Diagnostics, еmpirical mode decomposition, extreme filtering, time-frequency distributions

  • Method of compensation offset voltage operational amplifiers with classical input stages based current mirrors

    Are considered method of reducing one of the most essential components of the voltage offset Uvo operational amplifiers (op-amp), executed on classical architecture with current mirrors, which is linked to the change current gain of base (β) bipolar transistors in conditions of temperature and radiation effects.
    To solve this problem in the basic architecture of op-amp is entered special corrective multipole, which will provide low-current asymmetry in coordination of input differential stage (DS). The method is applicable to op-amp, which is inexpedient to make any adjustments to the original structure of the DS. 
    The analytical expressions determining basic parameters the compensation circuits Uvo, and also shows the tabular data that simplify the choice of standard functional components of precision op-amps.  

    Keywords: microelectronics, circuit design, a differential amplifier, operational amplifier, voltage offset, temperature drift, the effect of radiation on the zero level

  • Theoretical features of management of organizational conflict in modern management

    Article is devoted to aspects of management, aimed at investigating the nature of organizational conflict in order to identify the causes and possible management. Relevance of the topic emphasized by the fact that the study of conflict, its causes, and the methods and means of management emerged relatively recently and now, when the Russian economy is going through a stage of radical reform, this aspect of management is of interest for many researchers. Since the conflict in terms of joint activities of people are able to reduce labor productivity, it is necessary as soon as possible to anticipate. Particularly noteworthy are the management of organizational conflicts, as in the current economic development organization is a key participant in the economic relations and the conflicts that arise in this subject in need of early detection and effective management.

    Keywords: organizational conflict resolution, management, conflict management, the concept

  • Determination of the potential energy hexagonal flaring unit composite design, consisting of a base in the form of hexagonal plates rigidly connected to a circular cylindrical shell

    The article is devoted to the resistance accounts composite structures. The basis of the position of women variational energy principle. Considered potential energy flanging to calculate the stress-strain state of construction, consisting of a base of the form of hexagonal plates, rigidly connected to the base of circular cylindrical shells, the upper end of which is enhanced by the hexagonal crimping.

    Keywords: plate, shell, variation-energy principle, the strength, the composite structure

  • Electronics module for avalanche photodiode signal readout

    Circuit features of the electronics module for avalanche photodiode signal read-out, created on a basis of the specialized analog IC, are considered. Measurement re-sults of characteristics and noise depending on signal source capacity are given.

    Keywords: avalanche photo diode, readout electronic, charge sensitive amplifier, shaper, electronics module

  • Research of change of tangents of tension and vertical movings from a lesovozny road train in a design of road clothes and a road bed

    Results of computer modeling intense the deformed condition of a design of road clothes of the lesovozny highway on vertical movings and tangents to tension by a method of final elements on the program PLAXIS complex are given. Deformation of constructive layers of road clothes occurs under the influence of loadings from a lesovozny road train. Results of researches of change of tangents of tension and vertical movings are given for a covering, the basis, a working layer of earth of a road bed.

    Keywords: stone mastic asphalt, lesovozny road train, design of road clothes.

  • Development and design of bimorph thermal actuator and а micromirror based on it

    A design of the actuator, consisting of a thin layers of silicon dioxide and aluminum is proposed. There are calculations made of the response speed and heat dissipation of the actuator. By making the best selection of layer thicknesses and optimization stages of technological process, in particular the deep selective etching of silicon, the best performance on the angle of inclination of the actuator and the speed of the device could be achived. The greater the difference between the initial temperature and the heating temperature, the stronger the beam of the actuator is lowered to the plane of the silicon plate, and, therefore, less angle of elevation above the surface of the silicon plate. It is thus possible to control the angle of the beam by selecting the appropriate heater and voltage, providing the desired temperature. The design of the micromirror device based on the proposed actuator is provided. The developed design is based on the actuator and allows for controling the tilt of the mirror in a wide range.

    Keywords: silicon, termoactuator, micromechanical systems, bimorph structure, micromirrors

  • Properties of materials, which are used in the study of the performance of strengthened reinforced concrete constructions

    This paper addresses the testing results of steel rods with grade A500 and A600, which used as a conventional reinforcement. It was investigated the strength properties of carbon and fiberglass sheets with different number of material layers. The results are compared with the data given in the quality certificates.

    Keywords: fiberglass, carbon frp sheets, laminates, sheets of carbon and fiberglass, the ultimate load ,strength

  • A model of optimal biological resource exploitation with corruption

    The paper reports on dynamical model of optimal biological resource exploitation with corruption. Particularly, it is allowed a fish quota increase after paid a bribe. The research has been realized with the sustainable development conception by the Pontryagin's maximum principle. A time moment, where the bribe is profitable, is considered. Fight corruption methods are presented.

    Keywords: Mathematical model, optimal exploitation, corruption

  • Construction of a model of equiresistant multispan beams

    Method of successive approximations was used to solve the problem of optimization of multispan continuous beam. Cross section of a beam was a welded I-beam.  By the variation of the width of the shelf we ensured that the maximum equivalent stress for energy theory of strength in each section is the same throughout. The solution is made numerically using complex MatLab. Bearing capacity of beams with variable stiffness along the length increased in 2 times in comparison with the beam with constant stiffness and the same mass. The proposed method can be applied to frames, taking into account the contribution of longitudinal forces in the equal stresses. Another effective way to change stiffness is to change the height of the wall of I-beam. In practice curvilinear shape of beams or shelves are not used because of complexity of manufacturing. They are replaced by the discrete form of cross section.

    Keywords: multispan beams, work method, optimization, uniform strength, welded I-beam, variable stiffness

  • Developing of the algorithm of maximum flow of minimum cost finding in a fuzzy dynamic network

    The article considers the problem of maximum flow of minimum cost finding in fuzzy dynamic transportation network. The relevance of the problem is in its wide practical application on the rail, air, sea and other roads in finding of routes of minimum cost. The feature of the problem statement is that fuzzy nature of the network parameters, such as arc capacities and costs is taken into account. It allows us to make decisions more sensitive to environmental changes. The dependence of network parameters from flow departure is also considered, that allows to introduce the notion "dynamic" network as opposed to "stationary-dynamic", examined in the literature. The algorithm for solving the described problem in fuzzy conditions is proposed. To illustrate the algorithm a numerical example is presented.

    Keywords: dynamic network, maximum flow of minimum cost, fuzzy numbers, arc capacity, transit time