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Bourdine A.V.,Volga State University of Telecommunications and Informatics | Delmukhametov O.P.,Ufa State Aviation Technical University
Telecommunications and Radio Engineering (English translation of Elektrosvyaz and Radiotekhnika) | Year: 2013

A method for calculating the transmission parameters of random-order launched modes, propagating in telecommunication quartz multimode optical fibers with a random gradient profile of the refractive index, bounded by one external solid cladding, is presented. The solution is based on the use of the modified Gaussian approximation, generalized to the above case, in combination with the mixed finite element method, adapted for analysis of multimode fiber waveguides. Copyright © 2013 by Begell House, Inc.

Ovchinnikov E.L.,Samara State Medical University | Ivanov V.V.,Volga State University of Telecommunications and Informatics | Ovchinnikova Y.V.,University of Finance and Administration in Prague
Applied Mechanics and Materials | Year: 2014

Audiometry, which is currently used in medical practice, is based on the experiments of the last century. Using numerous clinical tests, it's played a major role in the auditory disorders diagnosis. But its capabilities are very limited. © (2014) Trans Tech Publications, Switzerland.

Lozhkin L.D.,Volga State University of Telecommunications and Informatics
Journal of Communications Technology and Electronics | Year: 2013

It is shown that ambient illumination of the TV screen introduces color distortions in viewed TV programs. The magnitude and type of these distortions depend on the brightness and spectrum of the source of ambient illumination. A method for correction of these distortions is proposed and two ways of its implementation are considered. © 2013 Pleiades Publishing, Ltd.

Lozhkin L.D.,Volga State University of Telecommunications and Informatics
Journal of Optical Technology (A Translation of Opticheskii Zhurnal) | Year: 2012

This paper discusses the possibility of constructing an equal-contrast color space based on the mathematical apparatus used in Einstein's general theory of relativity. Such a construction makes it possible to avoid the drawbacks inherent to the color spaces that are currently known and used - namely, the difference of the sizes of the MacAdam ellipses, depending on the chromaticity of the stimulus. © 2012 Optical Society of America.

Tarasov V.,Volga State University of Telecommunications and Informatics | Bakhareva N.,Volga State University of Telecommunications and Informatics | Ushakov Y.,Orenburg State University
WMSCI 2015 - 19th World Multi-Conference on Systemics, Cybernetics and Informatics, Proceedings | Year: 2015

The paper presents a software add-on to the traffic analyzer Wireshark to calculate the moment characteristics of the distribution of intervals between packets. It obtains an analytical solution for the average waiting time for queuing type H2/M/l Hyperexponential distribution with 2nd order intervals of the input stream by solving a Lindley integral equation using the method of spectral decomposition. It is shown that in this case, the distribution of intervals between the requirements of the input flow can be approximated up to its first three moments.

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