DIFFRACTION OF the
H-POLARIZED WAVE AT THE STRIP
Kevanishvili G.Sh.,
Kevanishvili I.G. and Kotetishvili K.V.
Georgian Technical
University
Abstract.
The rigorous solution of the problem of diffraction of
the plane H-polarized electromagnetic wave at ideally conducting, infinitely
long thin strip is presented. There is given in the explicit (analytical) form
the dependence of the surface current of the strip on the transverse coordinate
and parameter 
, where 
being the wavelength; 
the
half-width of the strip. The characteristic of re-radiation of the strip is
also given in the explicit form.
Keywords: diffraction, H-polarized wave, ideally conducting strip.
DIFFRACTION OF THE
PLANE WAVE AT IDEALLY CONDUCTING THIN STRIP
Kevanishvili G.Sh.,
Kevanishvili I.G. and Kotetishvili K.V.
Georgian Technical
University
Abstract: By the method of dual integral equation, the rigorous solution to the
problem of diffraction of the plane E-polarized electromagnetic wave at the
strip in case of normal incidence was obtained. The explicit (analytical)
expressions for distribution of the density of the surface current at the strip
as well, as the characteristics of reradiation depending on the parameter of
the strip 
are
given, 
being the wavelength and the width of the
strip, respectively. There were found the values of 
, at which the strip does not reradiate
(scatter) in side directions, 
being the roots of transcendental
equation 
. The numerical results in the form of the pattern of
the strip are given.
Keywords: ideally conducting strip, plane electromagnetic wave, diffraction,
E-polarization, rigorous solution.
SUMMARY
Radiation of the plane
transmitter with a single dipole
Chuntishvili I.I.
Georgian Technical University
The
electrodinamic problem of radiation of the plane transmitter with a single
dipole has been solved by a rigorous approach. The explict expression for
current density distribution on the dipole surface was obtained. The formula
for the design of the transmitter pattern was derived.
Keywords: transmitter,
radiation, dipole, pattern.
SUMMARY
LAGRANGIAN
CHAOS IN ELECTRODYNAMICAL VORTEX STRUCTURES
Kharshiladze
O.A.
Iv.
For
investigation of dynamic ionospheric vortex structures, the method of Poincare
sections is used. The two-dimensional, dynamically consistent model, evincing
Lagrangian turbulence, is considered. The calculation results of trajectory and
coordinates show that the particles move chaotically over the whole region,
except the regular “islands”. The stationary vortex structure
destruction at small harmonical disturbance of the stationary flow is demonstrated..
Keywords: Lagrangian
chaos, vortex structure, ionosphere.
FLOW BETWEEN TWO COAXIAL TUBES NEAR THE
INLET
Tsutskiridze V.N.
Georgian Technical University
Abstract: Laminar
inlet flow (flow in the inlet length) of incompressible viscous fluid
between two co-axial cylinders was studied on the basis of
linearized Navier-Stokes equations. It was assumed that the velocity of the fluid is
uniform at the inlet cross-section. The formulae for the longitudinal component
of velocity and the pressure gradient in the inlet length were obtained.
Keywords: сoaxial cylinders,
Cylindrical polar coordinates, flow pressure gradient, longitudinal
component of velocity.
SUMMARY
NON-STEADY FLOW OF CONDUCTING LIQUID with
consideration FOR the inhomogeneous
OUTER MAGNETIC FIELD
Tsutskiridze
V.N.
Exact solutions of
non-stationary problems were
obtained for fully developed flow of conducting liquid in the direction of the x axis through inhomogeneous outer magnetic field 
for half-space
and a flat tube under the condition of equality of magnetic and kinetic
viscosity. In the case of
half-space, the solution is expressed in terms of the integral of
probability.
Keywords: conducting liquid,
non-steady flow, inhomogeneous magnetic field, half-space, flat tube, integral
of probability.
SUMMARY
Nonaxisymmetric strain of the open spherical shell
Gegelashvili
T.A. and Bekirishvili M.L.
A boundary problem on nonaxisymmetric strain of the
open spherical shell being under the effect of internal pressure was
formulated. The solution to the problem was constructed in the form of series
of trigonometrical functions and the Legendre polynomial. The factors of these
expansions satisfy the infinite set
of algebraic equations which can be solved by the method of reduction.
Keywords: spherical shell,
nonaxisymmetric strain, boundary problem.
SUMMARY
On the gravity wave velocity
Garibashvili
D.I. and Dakelyan A.G.
Department of
Informatics of the
Based on the assumption about high-density packaging
of particles in the black hole, the dependence of the radius of the black hole
on its mass was determined. It was found that the gravity wave velocity was by
several orders of magnitude greater that the velocity of light.
Keywords: gravity waves, wave
velocity, black hole.
ONE METHOD OF CONSTRUCTION OF
MUTUALLY INVERSE MATRICES
OVER THE GALOIS FIELD AND A NEW
CRYPTOSYSTEM
Megrelishvili R.P., Khutsishvili
G.K. and Chelidze M.A.
Iv.
Abstract: In this work a new method
of constructional generation of mutually inverse matrices is proposed. It is
shown that there is a possibility of constructing nxn matrices over the Galois field GF(q) for any integer n>0. Secret-key cryptosystems and a
combined cryptosystem are also the subject of study in this work.
Keywords: cryptosystem, mutually
inverse matrices, secret-key, encoding-decoding, chosen-text attack.
Investigation
OF THE depth and THE character of transformations during mechanical polishing
of ground surface
of Fe-Cr-Al-La alloy
Kutelia E.R., Tsurtsumia O.O., Adanir H., Bakhtiyarov S.I., Beradze D.L. and Eristavi
B.G.
Republic an Center for
Structure Researches,
New Mexico Institute of Mining
and Technology, the
Abstract. By the
methods of Auger-electron spectrometry (AES), scanning electron microscopy (SEM), fast electron diffraction (FED) and wavelength dispersive spectrometry (WDS), there were carried out complex investigations on the structure and elemental distribution in the Beilby layer formed during mechanical polishing of ground
surface of Fe-44%Cr-4%Al-0.3%La alloy. It was established that the Beilby layer
formed during mechanical polishing of ground surface of the investigated alloy
consists of two sub-zones with uniform thicknesses combined with each other
organically. The first (outer) zone with thickness of ~250Å is a truly
amorphous layer saturated with oxygen and carbon atoms; and the second,
underlying (inner) zone of ~350Å thickness, which also has high
concentration of oxygen and carbon, is of a nanocrystallite (~20Å)
structure (in roentgen-amorphous state). The ratio between the thicknesses of
the given zones, which compose the Beilby layer, to a certain extent depends on
the polishing duration and the condition of the initial surface antecedent to
mechanical polishing. On the basis of observable peculiarities of the character of changes in the thickness of
revealed zones depending on the polishing duration and the initial surface
condition before mechanical polishing, there have been of developed notions of
the hierarchical sequence of stages of formation of the Beilby layer (and
layers under it) as a product of the combination of processes of visco-plastic
mass-transfer and growth of crystal structure defects, which are accompanied by
plastic deformations. The stabile existence at room temperature of the superficial layers with
truly amorphous and “roentgen-amorphous” states, which are so
nonequilibrium against the underlying
crystalline structure, is explained by the dissolution of those layers with
carbon and oxygen atoms and their interaction with the basic atoms which
compose the investigated alloy.
Keywords: surface, Fe-Cr-Al-La alloy, mechanical polishing,
Beilby layer, amorphism.
Summary
Quenching
of triplet states with phenols
Kokrashvili T. A., Shengelia M.A. and Kokrashvili
A. T.
There are given the values of the Kinetic isotopic
effect at quenching of triplet states of quinines with 3A phenols
which justify the mechanism of quenching proposed in this and previous works.
According to this mechanism, the kinetics of quenching and the quantum yield of
radicals are determined by three elementary stages: the process of formation of
the complex with a hydrogen bond, the transfer of hydrogen atom and the
photolytic equilibrium in the complex formed. The isotopic effect for the rate
constant of quenching of triplet states of quinines with phenols increases, as
increases the acidity of phenol, and then decreases again.
Keywords: triplet states, quinines,
phenols, quenching.
Summary
The peculiarities of annealing of defects of the Ec-0.17 eV level in Irradiated n-Si
Pagava T.A.,
Kharashvili O.G., Maisuradze N.I., Khasia N.I. and Kanchaveli D.E.
In the n-Si crystals irradiated with protons having
the energy of 25MeV, the radiation-induced defects of the Ec-0.17 eV
level were annealed in two stages: Tan=2000C and
3000C. It is demonstrated that, unlike the divacancy (V2),
Tan of the defects annealed at 2000C does not depend on
the concentration of disordered regions (DR). This points to the fact that
these defects are of the internode CiCs - type (internode
carbon-carbon in a node). At Tan=3000C, the A-centers are
annealed. The negative annealing of A-centers and V2 is connected
with dissociation of DR.
Keywords: n-Si crystals, protonic
irradiation, radiation-induced defects, isochronous annealing.
ON
AN ANALYTICAL-GEOMETRIC METHOD OF SOLUTION OF THE SET OF NON-LINEAR EQUATIONS
Onal
H.
Abstract: An analytical-geometric
approach to the non-linear equation system is suggested. The method connected
with the necessity of determination of new intermediate centers of rotation of
multi-joint spatial mechanisms is based on orthogonal transformations of
Euclidian space.
Keywords: nonlinear equations,
analytical geometric method, orthogonal matrix, Euler’s angles, system of
basis vectors, inverse transformations, inverse kinematic problem.
ON
AN ANALYTICAL-GEOMETRIC METHOD OF SOLUTION OF THE SET OF NON-LINEAR EQUATIONS
Onal
H.
Abstract: An analytical-geometric
approach to the non-linear equation system is suggested. The method connected
with the necessity of determination of new intermediate centers of rotation of
multi-joint spatial mechanisms is based on orthogonal transformations of
Euclidian space.
Keywords: nonlinear equations,
analytical geometric method, orthogonal matrix, Euler’s angles, system of
basis vectors, inverse transformations, inverse kinematic problem.
, simplex design, instrument accuSUMMARY
The investigation of properties of the first-order three-component
simplex-grating design at accounting for errors of measuring instrumentation
Beraia N.O.,
Zedginidze I.G. and Modebadze T.Z.
The properties of D-, A- and E-optimality of
first-order simplex-grating Sheffe designs were studied in the process of their
application to determination of the components of measuring instruments having
specific errors. The simulation of different errors of measuring
instruments was performed by
overlapping of random numbers distributed by the normal method on the
coordinates of the linear design. It was established the properties of D-, A-
and E-optimality deteriorate to a certain extent at using real measuring
instruments.
Keywords: experiment designracy.
SUMMARY
Wave process in the shell-bar structure under axial loading
Gegelashvili T.A.
and Verulashvili L.G.
This work is devoted to development of the method of
numerical modeling of he problem of determination of dynamic reaction of the
axisymmetrically loaded mechanical system consisting of two cylindrical shells
at the joint of which a thin rigid body of weight M2 is placed. To
the ends of the combined shell, undeformable weights M1 and M2
are fastened, and they are
connected, along the system axis, to weight M2 with springy bars
having cross-sections S1 and S2. The mathematical model of the process with
account for axial symmetry is a linear set of dynamic equations of the theory
of Timoshenko shells, which considers for shearing strain and rotary inertia of
the lateral element.
Keywords: shell, bar, wave,
structure, axial load.
SUMMARY
Stressed-strained state of the bar dome structure
Jincharadze
I.G.
The theoretical statements of the method of design
of bar domes and the algorithm for computer-aided design of such domes are
presented. The method of finite elements has been used. The values of
transition coefficients are given in the tables. Using those tables, after
processing the testing results, a vivid pattern of the model deformation was
obtained.
Keywords: dome, bar,
stressed-strained state, computer-aided design.
SUMMARY
Deign of the rigidity of three-layer panels
Kacharava I.T.
There were synthesized algorithms and derived
formulae which make possible the investigation of the effect of dimensions and
arrangement of holes on the carrying capacity of three-layer panels and the
determination of the coefficient of reduction of critical load with account for
the hole. The suggested procedure allows considering for different conditions
of bearing-up along the outline.
There were also derived the formulae for
determination of the critical load on the panel at various combinations of
boundary conditions: at two restrained and two hinge-supported edges; at two
springy-supported and two hinged edges; at four restrained edges.
Keywords: three-layer panel,
rigidity, design.
SUMMARY
On the generality of the notion of duality of evolution
and revolution
Khvedelidze
M.A.
The
author supposes that the duality of evolution and revolution could be realized
with consideration of existing certain similarity in the processes of
self-organization of various systems from physical-chemical to biological and
social ones and, at the same time, of their certain difference from their
initial level. But the history of all revolitions has always been in the transient
period, in the state of inevitable chaos. The possibility of transition to a new
stable state requires a great amount of energy. In this case, the general rule
of duality of structural organization of matter acts like in the case of dual
polar-pair states of the matter. The author considers that the existence of
inverse transformation from the state of order to the state of chaos today can
be justified by the example of the social system. Later, after studying
thoroughly the physical vacuum, it would be also possible to demonstrate the
inverse transformation of diffused energy and information into the concentrated
state according to the absolute principle of conservation of energoinformation.
It is stated that, without formation of at least a single type of dual regular
polar-pair state of matter, the Earth itself could not have emerged.
Keywords: self-organization, duality,
energoinformation, evolution, revolution.
SUMMARy
Academician mate mirianashvili’s works on quantum mechAnics
Lekvinadze
I.Sh.
A.
Three works on quantum mechanics by Academician Mate
Mirianashvili are discussed. These works are: On the Variational Problem of
Quantum Mechanics, The S-Matrix and Narrow Structure Formula and On the
Relativistic Magnetic Moment of Charged Particles. It is demonstrated that, in
these works, the author explained the issues of equivalence of various
mathematical methods of studying the corresponding phenomena and clarified the
situation.
Keywords; quantum mechanics,
Mirianashvili’s works.
Summary
On the issue of modeling of elements and circuits in nanoelectronics
Dadunashvili
The principles of modeling of elements and circuits
in nanoelectronics are considered. The evolution of electronic elements at
transition to the nanorange is
shown. A new circuit technique of electronic devices is established.
nanoelement,
single-electron transistor, quantum dot, simulation, neural network.
of Requirement of Overcoming the Digital Divide on the
Way of Building the Information
Society
Zumburidze
O.G. and Lezhava G.B.
Abstract. The article discusses the opportunities of
application of the infotelecommunication overcoming the information disparity,
the so-called digital divide in comparison with the developed countries. The
level of penetration of various ICT-based services in these countries with indication of ICT densities
(teledensity, computer density etc.) is shown. The economic and information
criteria of the Global Information Society and Jeep’s charts are also
considered
Keywords: information disparity, digital divide (gap),
ICT-based services, penetration, teledensity, computer density, Jeep’s
chart, Global Information Society.
SUMMARY
information
security
Kachlishvili T.T.
In recent years the demand for the services in the
sphere of information security (IS) in
Keywords: information network security, complex protection,
prevention of unauthorized accesss, security against spam, security of ports.
SUMMARY
DATA
security in computer networks
Kachlishvili T.T.
There are discussed the problems related to data protection and to one of powerful programs providing the protection against viruses in LAN by Intel LANDesk Virus Protect, which is based on a network server. Antivirus programs struggle against viruses. There are discussed the operation of the network and the resolution of problems of configuration, restriction of access and other safety measures providing continuous performance of computer netwworks.
Keywords: data security,
protection against computer viruses, restriction of access, unauthorized
access.
SUMMARY
On The systems of synchronization in digital communication networks
Naskidashvili
D.P.
The system of synchronization for digital
communication networks is considered. An example of commutation of digital
signals in communication networks is given.
Keywords: digital network,
communication network, synchronization
SUMMARY
On the issue of determination of the
availability function of some types of equipment
Jojua Z.S. Arabuli N.V. and Jojua N.M.
There was studied the
reliability of machines subject to two kinds of failures detected at the moment of their
occurrence by perfect continuous control. The two kinds of failures were the
following: wear failures distributed by the random law and random failures
distributed by some complex combinations of exponential distributions, e.g. the
procurement combination of exponential distributions. In this case, only two
states of the equipment were considered: “operates” and “does
not operate”. As a failure was taken an event that caused complete
cessation of output of products. After the failure, the equipment was returned
to service, and, after recovery, there did not occur such failures. The
function of availability for service was also determined.
Keywords: equipment, reliability, failure, availability for service, repair.
0
ANALYSIS OF BIO-ENERGY COMPLEX MANAGEMENT
Tolomashvili A. I., Tkemaladze G.Sh.,
Khidesheli T. M.,
Gelashvili I.V. and Tolomashvili I.A.
National Chamber for Environment, Quality,
Technical Safety and Labor Processes Management
Abstract. There were developed variational
series of the bio-energy complex, which differs from the semi-open premises for
the cattle in the farm economies, considered in the literature, as the
farm-elevator allows for full mechanization of production processes in
cattle-breeding, control of basic parameters and mechanisms, provision of
comfortable conditions, facilitation of maintenance, weight growth and healthy
environment. It is proven that, in many cases, waste treatment ensures incomes,
which are even higher than revenues provided by sales of the main products.
There are shown the possibilities of production of the biogas and fertilizers
from the wastes, and there is proposed the calculation of the economic effect.
Keywords: bio-energy complex,
management, analysis
THE
METHOD FOR NEUTRALIZATION OF WASTE WATERS
Tolomashvili A.T., Tkemaladze G. Sh. ,
Arevadze G.G., Gelashvili I.V.,
Tolomashvili I. A. and
Kaldani G. N.
National Chamber for Environment, Quality,
Technical Safety and Labor Processes Management
Abstract. The work deals with the
original method of neutralization of inorganic wastes and waste waters, which
prevents their spreading into the environment, in particular, in the arable
lands and hydrographic networks.
There is shown that, by adding various components to the wastes and
waste waters it is possible to produce new construction materials with desired
properties, which, besides ensuring the healthy environment, provides
significant additional profil.
Keywords: neutralization, waste
waters, inorganic wastes.
SUMMARY
On
the issue of sea water concentration by the method of electrodialysis
Chkheidze N.V., Enukidze N.E.
and Kurtskhalia Ts.S.
The
availability of sea water concentration by the method of electrodialysis with
the aim of its further processing is shown. The experimental work on models at
different dialyzate flow rates was performed. The possibility of continuous
production of 23-25% concentrations of sea water was determined. The power
input and the specific parameters of the process of electrodialysis were
calculated.
Keywords: sea water concentration,
electrdialysis, power input, specific parameters.
SUMMARY
ON Functional tasks of ecological monitoring
Mchedlidze
M.G. and Lezhava A.P.
In the framework of general system approach to the
organization of ecological monitoring, there are discussed functional tasks the
realization of which is essential for security of ecological safety. The block
diagram of organization of ecological monitoring, which presents the
information about structural links among the units is presented.
Keywords: ecological monitoring,
functional tasks, block diagram.
SUNMMARY
On ecological consequences of emergencies and
disasters at enterprises with chemical technology
Lezhava A.P.
Emphasis is placed upon ecological
consequences of emergencies and disasters at enterprises with chemical
technology, spread of harmful chemicals in the environment and their migration
in environment-forming components with the changes caused by chemical
conversions proceeding in the biomass of plants and living organisms. There is
proposed a diagram of the model of the environment represented in the form of a
number of basins (components), which can be various media, biospheric layers
and other. By using differential equations, there is explained the dynamics of
transfer of substances from one basin (component of the environment) to other
and the exchange process among these basins.
Keywords: chemical enterprise, environment protection,
emergency, disaster, ecological consequences
SUMMARY
On the statistical control of water quality in the process of water
treatment
Gujabidze M.R.
There is considered the
procedure of application of statistical theory of water quality control in the
process of water treatment in water supply systems by constructing and using
Shewhart charts in accordance with British Standards. The block diagrams
descriptive of the sources of variation of treated water quality and the
functions of water quality control are presented. The proposed procedure can be
used for water quality control in the steady process of water treatment.
Keywords: water quality, water
treatment, statistical control, control charts, Shewhart charts.
Summary
On the prediction of anthropogenic effects oN the environment
Dumbadze Z.A.
The block diagram of the system of prediction of
anthropogenic effects on the environment is presented. The available up-to-date
information about a phenomenon, a process or an object to be predicted enters
the prediction system via its input, and the data on the expected parameters
(i.e. the prediction) of the phenomenon, the process or the object are output.
As a future situation related to the anthropogenic effect depends on many factors of stochastic origin and is
characterized by uncertainty, the method of maximum likelihood has appeared to
be suitable for this case. The abovementioned method is based on the
probabilistic approach. The analysis and the estimation of predicted parameters
of anthropogenic factors are often multiple-factor and are associated with
elimination of uncertainty. This requires the application of the system
approach and the corresponding body of mathematics.
Keywords: prediction, anthropogenic
effect, environment, block diagram, method of maximum likelihood.
SUMMARY
On the Problem of quantitative estimation of
semantic information
Lezhava G.G., Kamkamidze I.Sh., Berikashvili Z.I., Mkrtchyan E.M. and
Vardosanidze A.K.
As informational
technologies progress, the sphere of application of the term
“information” expands. At the same time, the meaning they put in
this term becomes somewhat hazy. For further progress in the field of
artificial intelligence systems, it is essential to develop a semantic theory
of information and, thus, to make clear such a basic notation as information.
In the present work is made an attempt of development of a new approach to the
solution of the problem: information is considered as a process of cognitive
interaction; two forms of informational interaction are distinguished; their
quantitative estimations are given.