A.V. Agranovsky, A.V. Balakin, and P.A. Khadi

Present-Day Patented Solutions in the Sphere of Steganography

Due to appearance of a great number of applied problems related to the necessity of building up of anonymous data transmission channels (e.g. in financial cryptography) and providing for copyright protection in the sphere of informational technologies, scientific achievement in the sphere of steganography acquired a special interest. The paper contains a broad-scale review of research problems having patented solutions. The problems related to the aspects of steganography are considered. Classification and analysis of the suggested in patents algorithms and methods for data concealment are provided.

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G.V. Gorelov and A.V. Pchelintsev

Analysis of G.711 Codecs Using the Pareto Distribution of Interval Duration in Sample Flow

Employment of mathematical methods is considered for analyzing G.711 codecs. The Pareto distribution of the interval duration in the sample flow allows analyzing the codec quality with the variation coefficient exceeding 1.

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G.S. Gulyayev, A.D. Lutsenko, and L.A. Goncharenko

Method for Selection and Substantiation of Base Models for Uniform Radioelectronic Means in the Interests of Technical Level Estimation

The methodological approach to selection and substantiation of base models for estimation and preassignation of the norms with respect to technical quality of radioelectronic means is suggested. The suggested approach is based on using an updated paired regression method and allows to perform correcting of the forecasted values of the technical level parameters considering the really existing between them interrelations.

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F.G. Bass, D.V. Mikhaylova, V. Prosentsov1, and L. Resnick
The Jack and Pearl Resnick Institute for Advanced Technology,
Department of Physics, Bar-Ilan University, Ramat-Gan 52900, Israel
1Electrical Engineering Department,
Technion - Israel Institute of Technology, Technion City, Haifa 32000, Israel
Resonance Scattering by a Small Particle above a Perfectly Reflecting Periodic Rough Surface

The wave scattering by an arbitrarily shaped small particle located above a perfectly reflecting periodic rough surface is studied with the use of the local perturbation and integral equation methods. The total field propagating in the half-space above the surface has been calculated. The resonance frequencies of scattered fields are found for the case when the particle is spaced far apart from the surface.

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A.A. Bulgakov, B.P. Yefimov, A.N. Kuleshov, and M.O. Khorunzhiy
A. Usikov Institute of Radio Physics and Electronics,
National Academy of Sciences of Ukraine
12, Academician Proskura Str., Kharkiv 61085, Ukraine
Experimental Investigation into Spherical Plasma Formations

This paper presents the results from experimental study into discharge processes in a water medium. A breadboard model and a measuring procedure are described. Special conditions are created to excite spherical plasmoids in a water-air system. The radiation of high-energy photon is experimentally obtained from the discharge space. A theoretical model describing the excitation and existence of spherical plasma formations is proposed. Attempts are made to explain the stability of spherical formations to the existence in a plasma-like medium of natural (inhomogeneous) electromagnetic waves which are known in the literature as complex ones.

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O.A. Zamuraev, I.V. Lopatin, and A.F. Rusanov
A. Usikov Institute of Radio Physics and Electronics,
National Academy of Sciences of Ukraine
12, Academician Proskura Str., Kharkiv 61085, Ukraine
Experimental Investigation of Interaction between Electron Beams and Semiconductor Plasma

The results of the experiments related to the interaction between non-relativistic electron beams and semiconductor structures excited by electromagnetic oscillations of the millimeter wave band in the temperature range from +30 to -196oC are represented in the paper. The features of the research technique and the experimental setting have been considered. The SHF-signals, received at the excitation frequency 70 GHz and the nitric temperature of semiconductor samples (InSb), are interpreted as a result of interaction between an electron beam and surface waves in semiconductor plasma.

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M. Torres-Cisneros1, M.A. Meneses-Nava2, J.J. Sanchez-Mondragon3, J.A. Andrade-Lucio1, L.A Aguilera-Cortes4, and B. Hernandez-Galvan5
1 Optoelectronics Group, FIMEE Univ. of Guanajuato; Salamanca, Gto; 36715 M?xico 2 Optical properties of the Matter Group, CIO; Leon, Guanajuato; 37600 Mexico 3 Photonics and Optical Physics Lab, INAOE; Tonantzintla, Puebla, 72820 Mexico 4 Mechanical Dept., FIMEE Univ. of Guanajuato; Salamanca, Gto; 36715 Mexico 5 Graduate Student at Electronics Program, FIMEE, Univ. of Guanajuato
Novel Green Sources by Using Photonics Crystal Enhanced Second Harmonic Generation in a Planar Waveguide

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S. Alejandro-Izquierdo, I. A. Sukhoivanov, E. Alvarado-Mendez, J. M. Estudillo-Ayala, J.A. Andrade-Lucio, R. Rojas-Laguna, M.Trejo-Duran, and E. Vargas-Gutierrez
Facultad de Ingenieria Mecanica, Electrica y Electronica;
Depto. de Electronica; Universidad de Guanajuato;
Apdo. Postal 215-A, Salamanca, Gto., 36730 Mexico.
Demultiplexer Based on Photonic Crystals

Photonic crystals are periodic structures of the dielectric materials where is posible manipulate photons in many interesting ways. Photonic band gap can propagate specific wavelengths. We present the design of demultiplexer based in photonic crystals. The control of the dielectric materials, periodicity, and size of the dielectric, is very important for light propagation. In optical communications we need to work with 1.31 mkm and 1.55 mkm by the total dispersion and due to the minimum dispersions inside the fiber and therefore minimum loses. Our design of the demultiplexer is based on diference between the background and rod refractive index.

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Arturo Perez-Garcia, Victor Ayala-Ramirez and Raul-Enrique Sanchez-Yanez
Universidad de Guanajuato FIMEE, Electronics Engineering Dept.,
Tampico 912, Col. Bellavista, 36730 Salamanca, Gto., MEXICO.
Geno-Fuzzy Design of a Visual Servoing System

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E.I. Yatsevich, A.P. Nickolaenko, A.V. Shvets, and L.M. Rabinowicz
A. Usikov Institute of Radio Physics and Electronics,
National Academy of Sciences of Ukraine
12, Academician Proskura Str., Kharkiv 61085, Ukraine
Two Component Model of the Schumann Resonance Signal

The experimental Schumann resonance signal is shown to be a sum of two components: constant background and the variable part. The model of single moving source describes the alternating part of signal. It is associated with the motion of compact thunderstorm center around the Earth along the equator (and depends on the time). The background remains constant during the day, however it may vary with season. The contributions from these two components are estimated in the total intensity. The background intensity is shown to be of comparable level with that of varying part, therefore it must be incorporated into interpretation of experimental data. Seasonal variations are obtained for the background. Both the components have similar seasonal alterations, which indicates on a relationship in their origin.

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