Vol 5, No 1 (2006)

The procedure of evaluating the adequacy of the dynamic component of artificial and natural force of gravity (aerospace centrifuges and the Earth surface) has been developed. Distributions of amplitude values of ante grade and retrograde flows in arteries along the longitudinal coordinate and their response to external disturbance – tests for 4 groups of people of different sex and age have been obtained. Recommendations for programmers of experiments on short-radius centrifuges have been stated.

Problems of joint modeling of aircraft turbojet engines and fuel-regulating equipment in transition processes are discussed. Two approaches are compared- the method of structural patters, transfer functions, using Laplase transformations accepted for designing control systems and the method based on imitation modeling which is used when designing an engine. The paper shows the necessity of creating devices to carry out investigations and to analyze the engine dynamic in conjunction with the system of automatic regulation.

Peculiarities and algorithm of optimizing combined structures are discussed, engine pylon design taken as an example, with regard to a wide range of restrictions.

The paper considers an approach which makes it possible to estimate Technogenetic substance flow density distribution in time and space. The is a cloud of fragments of the broken space vehicle compartments. Specific indicators are chosen to estimate the cloud parameters. The solution of the problem involves modeling the breakage of a space vehicle compartment with a given number of fragments in the cloud. The fragments masses, ballistic coefficients, velocities and directions of flying are chosen. The orbits of the fragments formed and their further evolution are calculated. The author proposes making estimations for certain given values of volume calculated relative to the basic trajectory of the space vehicle broken. The modeling results for the chosen case of space vehicle breakage are given.

An automatic diagnostic complex has been developed and tested. It was designed on the basis of combined use of an interference – proof digital speckle – interferometer and the schlieren method. Processes ofmembrane combined excitation in a laminar gas flow and non – linear changes of configuration of the main of the oscillations analyzed in a turbulent flow are revealed. The diagnostic complex will find application in analysing ware interaction of working media and construction in many areas of science and technology.

The paper present solution of several problems of positioning the supports of statically definable beams according to the bending moment peak minimum criterion. The solution are intended to estimate the efficiency of numerical methods of construction optimization.

The paper deals with the problems of mathematical modeling of physical and chemical processes in gas-turbine engine combustors. Multicomponent reacting gas flow in a combustor is calculated. Using the results of a series of combustor parametrical calculations a liner design is selected with a minimum level of nitrogen oxide emission.

The paper presents the results of calculation of flow and drop liquid fuel concentrations in the combustions chamber nozzle. The numerical model used takes into account two stages of fuel spraying. Significant influence of secondary spraying on the formation of drop liquid fuel concentrations is revealed. It is shown that the methods developed can be used to analyse the influence of constructional and mode parameters of mixing devices on fuel concentration distribution in them.

The paper describes the processes in a general-purpose gas cylinder different from cryogenic capacities with low pressure levels stored without draining in that heat isolation is inside the vessel. Existing approaches to solving the problem of process calculation for similar two-phase systems are analysed.The results of calculating cylinder temperature condition carried out using a simplified method are presented.

A mathematical model for analyzing dynamic characteristics of a manual mechanized pneumatic tool is developed. The model makes it possible to assess the influence of various design parameters on the acoustic characteristics and the torque created by the tool in operation at the stage of designing.

The paper proposes a procedure for controlling the sequence of tubular articles by an elastics tool. An example of designing an elastic punch for sequential perforation of tubular filters is given.

The paper investigates the process of human eye crystalline lens accommodation in terms of mechanics on the basis of finite-element modeling. The results obtained suggest that the active forces of accommodation are the pressure difference between the front and back parts of the eye. A new hypothesis of accommodation mechanism principle is proposed.

The paper analyses the influence of flow velocity ratios, initial turbulence degrees and configurations of carbonic acid gas jets propagating in the transverse air flow on the position of the shift aree front boundary.

The papers present the procedure of calculating hydrodynamic parameters for liquid column motion in a plastic pipeline partially filled with air and connected up to a tank with an air cavity over the liquid. The liquid starts moving at the moment the eiectropnevmatic gate is opened.End the motion depends on the pressure in the tank, pipeline parameters and the number of bends in the pipeline. Hydrodynamic parameters are calculated on the basis of solving non – linear integral and differential equations by the finite difference method. The results of calculation make it possible to define the liquid velocity, the forces of liquid reaction in pipeline bends and to analyse the influence of the factors affecting them.

The paper proposes a mathematical model of a company’s Internet channel and a procedure for assessing its data transmission speed to provide the required quality of connection.
The method of utility function is used for selecting a particular Internet provider by the criteria of data transmission speed during one user session/given cost of connection.

The paper analysis a computerized information system for collecting, processing and analyzing instant data developed within the framework of a transport system. A data model is proposed, instruments for designed operative information database are described, algorithms of finding object concentration sports on a map are discussed.

In an effort to analyse telecommunication systems statistically the author considers markov’s system model, net traffic simulation by fractal Brownial motion, simulation of time series. Time series models developed for the statistical system of telecommunication system’ monitoring are given.

Standard personal and business letters accepted in the English language culture are analyzed from the point of view of ritual and etiquette. Letters are classified according to such parameters as the basic values underlying them, the aims and the participants. Letters in Russian culture, their similarities and differences are shown.

The paper deals with the influence of clusters on the region development, the problems of strategic planning on the basis of cluster approach and their role as points of grows of internal market.

The paper presents the results of empirical studies analyzing the efficiency of a higher school teacher’s pedagogical activity. Rating of teachers using different styles of pedagogical activity is given.

The paper deals with new approaches to analyzing the flows of material and spiritual production using the terminological chain «Object of nature- zero object of labour-primary object of labour-secondary object of labour-final product» in the context of ecological constituent.