In operation the case when the radiant of an acoustic signal is in a composite cylindrical pipe is viewed. It is shown, that at transition of a pipe of one diameter in a pipe of other diameter, it is expedient to apply modal representation of an acoustic wave to each site of a pipe.

Keywords: acoustics, the control, diameter, waterpipe

Engineering networks in the Rostov region are strongly worn-out. The main objective of a solution is construction, reconstruction or modernization of engineering networks of the Rostov region. Association of efforts of spheres of housing and communal services and telecommunication systems, will allow to solve a number of the main objectives of a considered problem. For this purpose it is necessary to prepare a complex of the organizational and technological actions which have been directly connected with works on joint laying of engineering networks and telecommunication systems.

Keywords: Organization, Decision, Joint laying, Construction, Reconstruction

The results of the creation of a controlling subsystem as part of the system of strategic management of the transport and road complex (TRC) development are given. Structural
And process controlling subsystem components for different hierarchical levels of strategic management and state policy in the sphere of TRC development are defined.

Keywords: strategic management, state policy, road and transport complex, controlling

Studied in article the question of decrease in electro resistance of inserts of trolleybuses, a design of a contact insert of slip rings of trolleybuses and a composite material for its manufacturing is investigated.

Keywords: Impregnation, carbon-graphite, an insert.

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The construction of a two-dimensional tiling by a specific projection of three-dimensional cubic lattice is considered. Different a periodic tiling’s, consisting of equal rhombi, are obtained by different choice of the projection region. They are ordinary a periodic tiling, having local elements of symmetry group С6v and chiral trigonal stacking, built like chiral pentagonal Penrose’s quasilattice [1], which occurs in virus cap sides.

Keywords: Quasicrystal, quasilattice, two-dimensionalquasicrystal, chiral quasicrystal.

Is calculated the mean distance between the diamond grains on grinding wheels by their characteristics. Is carried out of the duration, frequency and form of discharge impulses in electro erosion profiling of diamond grinding wheels.

Keywords: electro erosion profiling, correction, the distance between the diamond grains, frequency of discharge impulses, the duration of discharge impulses.

In this paper, the task of achieving the optimal bandwidth telecommunication channels. Focuses on technical aspects of managing bandwidth channels using virtual organization switched channels. Formally defined parameters affecting the guaranteed delivery service. A model and management solution parameters guaranteed delivery of information in the communication channels, based on the methods of the theory of stochastic processes theory and risk analysis.
Keywords: reliability of telecommunication systems, telecommunication systems modeling, stochastic processes, optimal risk management.

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    The structural model of functional mechanisms with stressed closed-loop contour which is used in the mechatronic systems is offered in this article. The problems of loading mechanisms forming are analyzed here. The work of self-regulating loading device is considered on the example of cutting mechanisms. The results of experimental investigations are represented.

Keywords: closed-loop contour, energy saving, reducing machines, loading mechanisms.

Carried out a comprehensive analysis of the factors governing the strength and resilience foams, for the manufacture of foam concrete mixes. Found that lowering the temperature of mixing water helps to improve the structural properties of the foams. 
Keywords: surfactants, foam, lyotropic liquid crystals.

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