SUMMARY
SECURITY ISSUES IN MOBILE AD
HOC NETWORKS
Chincharauli
M.G. and Namicheishvili O.M.
Georgian Technical
University
Current technologies and
security advances have made network systems and applications widely used. The
pervasive and practical aspects of wireless Mobile Ad Hoc Networks (MANET) made
them very popular as well. Òhis created the need for
securing MANET to provide users with authentic communication, secure and robust
information exchange and efficient
security mechanisms. However, many of the security solutions devised for
regular networks are not as efficient on MANET. This paper, deals with security
issues and their current solutions in the mobile ad hoc network. Owing to the
vulnerable nature of the mobile ad hoc network, there are many security threats
that hinaer its the development. The main
vulnerabilities in the
mobile ad hoc networks, which have made it
much easier rndure the attacks than the
traditional wired networks are analyzed. The security criteria of the
mobile ad hoc network are described and the main attack types that exist are
described. A survey of current security solutions for the mobile ad hoc network
is given.
Keywords: security, wireline
networks, protect, multihop network connectivity,
link-layer
and network-layer operations, mobile ad
hoc network, intrusion detection, secure routing.
SUMMARY
PROTECTION MECHANISMS: BIOMETRICS AND CRYPTOGRAPHY
Chkhaidze M.N.
Georgian Technical University
The objectives of the work were the statement of the problem of
protection and its provision by means of information technologies represented
by biometrics and cryptography. It was also intended, by contrasting these
technologies, to show on the whole which alternatives the overall goal and
hence the general result – the safety is achieved with. Possible threats and
attacks are considered, and the importance of biometric security is
demonstrated.
Keywords: data
security, protection, biometrics, cryptography.
SUMMARY
SOLUTION OF THE PROBLEM OF PORTFOLIO SELECTION BY USING MATHEMATICAL
METHODS
Magrakvelidze D.G.
and Gurtskaia P.A.
Georgian Technical University
The article deals with the problem of portfolio selection and its
mathematical solution. For the construction of efficient portfolio, some
assumptions about the principles of investment decisions must be made. The
refinement of the concept of risk adopted in the investment management was
formulated by Markowitz. According to the
principles of the Markowitz theory, the investor always chooses the portfolio
lying at the efficient frontier. This selection is
made by analyzing the risk-return relation between the risk and the return. Moving from left to right along the border, we increase
the expected risk, but at the same time the boundaries of profitability expand. Thus, it is
obvious that the optimal portfolio depends on the preferences when choosing
between the risk and the return. These preferences
can be described by the utility function.
Keywords: portfolio,
selection, profitability, investment, utility function.
SUMMARY
BLACK’S MODEL WITH THE ZERO BETA AND MERTON’S MULTIFACTOR CAPM
Magraqvelidze D.G.
and Gurtskaia P.A.
Georgian Technical University
The article deals with the Black’s approach, which is the generalization
of CAPM in the case of the risk-free interest rate at which the investor can
borrow and lend money. The version of CAPM derived by Black is called the
two-factor model. Empirical studies showed that it described the statistical
estimates of return better than the original CAPM did.
Taking into account the risks of investments encouraged Robert Merton to
improve the CAPM. This improvement is based on the principle of optimization of
the “future consumption” by the investor with account for the off-market
(extra-market) risk sources on which it depends.
Keywords: zero-beta portfolio, two-fañtor model, minimum-variance
portfolio, capital market line.
SUMMARY
SPECIAL FEATURES OF WIRELESS SENSOR
NETWORK TECHNOLOGY
Dadunashvili S.A. and Gogilidze E.R.
Georgian Technical University
The article principles of design
and architecture of wireless sensor networks. The Spheres of application of
such networks and the obtained results are described. The comparison of
standards and protocols of wireless sensor networks is performed. The serial peripheral interface
and technology of realization of communication between network units is
considered.
Keywords: ZigBee, sensor network, structure,
protocol.
MODERN TRENDS IN DIGITAL VIDEO BROADCAST
Khitarishvili G.I.
Georgian Technical University
The article deals with the standard of modern digital
video broadcast for Georgia.
Keywords: digital video broadcast,
trends.
SUMMARY
SOME ISSUES OF OPERATION WITH IMAGES IN JAVA
Namchevadze T.V.
Akaki Tsereteli State University, Kutaisi
Some classes of Java and the interface providing the
operation with images in Java are briefly described. Using interface
ImageObserver and its ImageUpdate, we can learn whether the image has
completely been downloaded. By double buffering, it is possible to display the
image wholly, without gradual downloading. With the help of interface
ImageProducer and MemoryImageSource of the class, we obtain the data (pixels)
for the image, while, using interface ImageConsumer and PixelGrabber of the
class, vice versa we get the data (pixels) from the image. Java provides
efficient operation with images.
Keywords: Java, interface, image, double
buffering.
SUMMARY
PRINCIPLE OF FEEDBACK AND ENTROPY
Didmanidze I.Sh. and Tkhilaishvili R.J.
Shota Rustaveli State University, Batumi
The article
deals with the principle of feedback and its fundamental role in worldwide processes. Two types of feedback, positive and negative, and the changes in entropy
depending on the feedback type are
discussed. It is demonstrated that there are a lot of examples of positive
feedback in everyday life. Moreover, it reveals itself in different processes
in the environment, on the Earth, in the cosmos etc. Like the positive
feedback, the negative one reflects the relationship between the system
(natural, engineering etc.) and the environment/external world. Despite the external influence, the negative
feedback retains its natural parameters.
Keywords: principle of feedback,
entropy, positive feedback, negative feedback.
SUMMARY
Modification of the target functional of neural
networks and selection of optimal parameters FOR FORECASTING PURPOSES
Didmanidze I.Sh. and Kachiani G.A.
Shota Rustaveli State University, Batumi
Neural networks designed for solving a specific problem acquire their
properties during the learning process. The learning process involves either
the determination of the weighting coefficients of the synaptic connections
among neurons or the introduction of special rules that would change the
weighting coefficients in accordance with the response of one or another neuron
or network. The forecasting results
obtained by using multilayer neural networks showed that, in
the case of a one-day forecast, the neural networks provided the exact
prediction. Long-term forecasting was still of high quality, though it tended
to worsening. The modification of the target functional allows improving
the quality of forecasting the trend direction by 20%.
Keywords: neural network, functional,
modification, forecast, optimal parameters.
ON THE STATISTICAL ESTIMATION OF THE PROBABILITY
DISTRIBUTION DENSITY: PART VII. ON THE GENERALIZATION OF THE SKOROKHOD-FERNICK THEOREM AND ONE
STATISTICAL PROBLEM IN THE HILBERT SPACE
Buadze T.G.
Abstract. The article
deals with the generalization of the Skorokhod-Fernick theorem. The problem of
application of the obtained result to the calculation of some functional
characteristics of the Laplace transform of the mean-square integral error of
the projection estimate of the unknown probability distribution density is
discussed.
Keywords: probability distribution, density, Laplace
transform, projection estimate, mean-square error, Hilbert space.
SUMMARY
HELICAL FLOW OF THE CONDUCTING FLUID IN THE RADIAL MAGNETIC FIELD
Tsutskiridze V.N.
Georgian Technical University
The article deals with the laminar stationary flow of the viscous
incompressible conducting flow of the vortex source type between two permeable
coaxial cylinders with electric power tapping to the external circuit via ring
electrodes. The azimuthal velocity component was fixed on the cylinder
surfaces. The induced azimuthal magnetic field satisfied the two conditions: it
was fixed on the surface of the inner cylinder and satisfied the condition
following from the Ohm’s law for the external circuit. The values of electric
power and electrical efficiency for big Reynolds’ numbers were computed.
Keywords: helical
flow, conducting fluid, viscous fluid, magnetic field.
SUMMARY
PARTICIPATION OF DEEP CENTERS IN ELECTRON SCATTERING
IN A STRONG ELECTRIC FIELD
AT 4.2K
Janelidze O.M. and Kutubidze B.V.
Shota Rustaveli Batumi State University
There is suggested a model according to which the
increase in the energy of deep centers in GaAs at 4.2K in the mode of impact
ionization is achieved by transferring a portion of energy of hot electrons and
localization of the energy of longitudinal acoustic oscillations of the basic
lattice atoms. This leads to the formation of the electric dipole moments of
quantum transitions in the excited deep center. The decrease in the mobility of
electrons with the increasing field is caused by the quantum-mechanical
scattering of electrons at the quantum dipole moment. Subsequent localization
of the energy of hot electrons and longitudinal acoustic oscillations of the
basic lattice atoms causes the reduction of symmetry, splitting, electron
capture, a decrease in the current intensity because of the reduction of the
free electron concentration and mobility, and the occurrence of current
instability.
Keywords: deep centers, electron scattering, dipole moment,
strong electric field.
SUMMARY
EXCITATION OF DEEP CENTERS WITH THE LONGITUDINAL ACOUSTIC WAVE OF THE
BRILLOUIN ZONE EDGE IN A STRONG ELECTRIC FIELD
Janelidze O.M. and
Kutubidze B.V.
Shota Rustaveli Batumi State University
The article deals with the excitation of deep centers with the
longitudinal wave of the Brillouin zone edge. It is shown that at 77K the
properties of deep centers change depending on the external electric field
strength. Via energy localization, they become the centers of disperse
scattering and electron capture under the reduction of symmetry. The excitation
of the center occurs during the process of localization of the energy of
longitudinal acoustic oscillations of the basic lattice atoms, wandering of the
energy of excited deep centers, and London and resonant interaction among the
centers.
Keywords: deep
centers, excitation, acoustic wave, strong electric field.
SUMMARY
SCATTERING OF THE PLANE ELECTROMAGNETIC WAVE BY THE PASSIVE REPEATER
COMPOSED OF A SCREEN AND AN IDEALLY CONDUCTING CYLINDER
Kevanishvili G.Sh., Meladze V.D.,
Mushkudiani G.G. and Robitashvili A.G.
Georgian Technical University
The electrodynamic properties of the repeater composed of a screen and a
circular cylinder arranged parallel to it were studied. The radiation
characteristic of the retranslator is presented in an analytical form. For a
particular case, the corresponding irectional patterns were built, their
physical analysis is given.
Keywords: repeater,
electromagnetic wave, radiation characteristic, directional pattern.
SUMMARY
EXPERIMENTAL STUDIES ON THE INTERACTION OF THE
RIGID STAMPING TOOL WITH THE POCKET FOUNDATION
Vacharadze
V.V. and Vacharadze Â.S.
Georgian
Technical University
The article deals with the interaction of the rigid
stamping tool with low-humid and moist loessial foundations in field conditions. The load and unload settlement of the stamping tool, contact pressure, and vertical and
horizontal shifting of the foundation
surface outside the rigid stamping tool
were measured. If the
external load value does not exceed the
structural strength of the soil, one can say with a fair degree of confidence
that the foundation response to stamping tool indentation is described by
contact design models based on the elasticity theory. If the external load
exceeds the structural strength of soil pressing, the conditions of development
of irreversible local deformations take place. In this case, the Winkler model
gives the best convergence with the experimental results.
Keywords:
ground, pocket, stamping tool, contact pressure,
structural strength.
SUMMARY
ASYNCHRONOUS ACTUATING MOTORS IN SHIP STEERING
HYDROELECTRIC DRIVES WITH THE CONTROL SYSTEM “TRANSVECTOR”
Chunashvili B.M. and Tugushi M.A.
Georgian Technical University
Batumi State Maritime Academy
An alternative technique of controlling the servomotor of ship steering
drives is offered. Thyristor drives allow controlling the current parameters of
ac machines. The controlling system “Transvector” provides the control accuracy
essential for ship steering drives.
Keywords: vector
control, ship steering, hydroelectric drive, servomotor.
IRRADIATION
OF THE CONCEPTUAL SYSTEM OF METABOLISM AND ENERGY
Kadagishvili
L.G.
V.
Chanvchanidze Institute of Cybernetics of Georgian Technical University
Abstract. The article deals
with the system unity of the conceptual relationship between metabolism and the
energy transformation. During this process, a number of different chemical,
mechanical, thermal and electrical phenomena take place in the body. A
particular energy change has showed a property making it possible to achieve
self-control through the information training, which will make it possible to
have the needed amount of energy irradiated. Among the energetic processes,
metabolism of some substances with the energy generated as a result of their
decomposition produced through the release of adenosine triphosphoric acid
(ATP) is of primary importantce. Irradiation of large amounts of energy is much
similar to this phenomenon.
Keywords: vital
processes, metabolism, energy exchange.
ELECTROMAGNETIC
PHENOMENA IN THE BIOFIELD
Kadagishvili
L.G.
V.
Chanvchanidze Institute of Cybernetics of Georgian Technical University
Engineering
Academy of Georgia
Abstract. The article
deals with the electromagnetic phenomena occurring in the biofield of the human
body. The damage of the biofield and
energy irradiation must be associated with both normal and anomalous Zeeman effects. The elementary particles and
the torsion field provoking the spin-orbital fields and causing various levels
of energy irradiation are associated with the intensification of the electromagnetic
field in the body, virtually evidencing the human health damage.
Keywords: biofield,
electromagnetic phenomena, energy irradiation, spin field.
SUMMARY
HISTORIC DEVELOPMENT OF TBILISI
BASED ON THE FUNCTIONAL METAMORPHOSIS OF ITS SUBURBS
Beridze K.T. and Bochorishvili T.G.
Georgian Technical University
The article deals with the functional transformation of
the suburbs of Tbilisi during the process of the historic urban development of
the city.
Keywords: urban development, suburbs, functional transformation.
SUMMARY
MARKETING CONCEPT IN TOURISM INDUSTRY AND ITS LINK WITH THE STRATEGY OF
FORMATION OF CONCRETE ADVANTAGES OF THE ORGANIZATION
Charbadze N.A., Guseinova J.G. and
Lezhava M.E.
Batumi State Maritime Academy
The formation of the market of tourist services, the necessity in the
development of the hotel-tourist complex, commercialization of the tourism
sphere in the country necessitated the implementation of marketing principles
in the institutions engaged in the sphere of tourism. The task includes
research and segmentation of the tourism market, quantitative and qualitative
assessment of the cost-effectiveness of tourist services, the use of the means
of communication, sale promotion etc.
Keywords: marketing
concept, tourism, tourist services.
SUMMARY
PLASMA CUTTING OF HIGH-STRENGTH COMPOSITES MADE OF
ARAMID FIBER
Sabashvili Z.V.,
Tadumadze Z.G., Sulamanidze A.K., Kodua N.P. and Mchedlishvili Z.T.
Georgian Technical University
Nonmetallic materials have found wide application in many fields. One of
the materials of that kind is a high-strength composite made of aramid fiber,
which belongs to the category of armoring materials. In industry, machining of
these materials is associated with some difficulties such as the transient
surface failure, the tight-fitting film around the lank, which involves
destruction of the material or degradation of its properties. In this
connection, the technology of plasma cutting of high-strength composites made
of aramid fiber was elaborated, and the corresponding plant was designed. The
design involves fixing of the material between copper plates, and water
delivery to the cutting zone and to the plate grooving from the side of the
contacting cut material provided melting of the cutting surface, which made it
readily susceptible to mechanical treatment without being destructed.
Keywords: aramid
fiber, plasma cutting, nozzle, arc power, cutting surface.
SUMMARY
VARIATIONS IN THE CHEMICAL COMPOSITION OF POWDER-LIKE MATERIALS UNDER
HIGH-ENTHALPY LAMINAR PLASMA SPRAYING
Khutsishvili M.G., Kikvadze L.V., Khutsishvili G.M. and
Shengelia L.B.
Georgian Technical University
The chemical composition of coatings deposited by high-enthalpy laminar
plasma spraying were studied using X-ray fluorescence analyzer INNOVXSYSTEMS.
It was revealed that, as compared to turbulent plasma flow spraying, in the
case of high-enthalpy laminar plasma spraying, the chemical composition of
deposited powder-like materials hardly changed.
Keywords: coatings, powder-like materials, laminar plasma
spraying, plasmon.
SUMMARY
IMPROVEMENT OF THE EFFICIENCY OF THE PHOTOELECTRIC CONVERTER OF SOLAR
ENERGY BY USING THE RELEASED HEAT ENERGY
Avaliani J. I.,
Avaliani I. M., Chikovani R. I. and Khachidze T. I.
Institute “Optica”
Georgian Technical University
The article deals with the investigation that will allow us to employ the
photoelectric converters of solar energy more efficiently. In particular, the
heat energy released by the photoelectric converter under the impact of solar
energy was studied. If we use this energy for effective work (for instance, for
water heating), we will be able to say that the photoelectric converters of
solar energy generate the energy of two types: electric power and heat energy.
Hence, the efficiency of the converters of that kind will increase
significantly.
Keywords: solar energy,
heat energy, photoelectric converter, efficiency.
SUMMARY
STRUCTURAL SPECIFIC FEATURES OF SOME SULFANILAMIDE-CONTAINING
COORDINATION COMPOUNDS
Miminoshvili E. B., Beridze L. A. and
Zazashvili S. R.
Georgian Technical University
Tbilisi State Medical University
Similar and distinctive features in the geometric parameters
characterizing the structure of coordination compounds of metals (II) with
sulfanilamide were studied. In the studied compounds, the bath angle Θ was
within 55-100º, the CSNC torsion angle Φ – in the interval 55 to 70°.
In the compound [Ni(C10H11N4O2S2)2(OH2)2],
the CSNC torsion angle between C(6)SN(1)
and SN(1)C(1) made up 7.20°.
Keywords: coordinate
compounds, sulfanilamide, structure, specific features.
FLEXIBLE CHOLESTERIC INTERFERENTIAL MIRROR
Petriashvili G.Sh., Japaridze K.G., Devadze L.V., Zurabishvili Ts.I.,
Sepashvili N.O. and Ponjavidze N.T.
V.
Chavchanidze Institute of Cybernetics of Georgian Technical University
Abstract. The selective reflection of
cholesteric liquid crystals is well known. It has found some dynamic optical
applications. This work deals with a new kind of the reflective mirror based on
the cholesteric liquid crystal. By using
the light imprinting method, an array of submillimeter-sized interferential
mirrors was imprinted to the flexible cholesteric liquid crystal film. The selectively
reflected colors of the cholesteric liquid crystal film changed in accordance
with the intensity of radiation energy.
Keywords:
cholesteric
liquid crystal, reflective mirror, selective reflection.
MICELLES OF SPIROPYRANS AND EFFICIENT PHOTOSENSITIVITY
Japaridze K.G., Devadze L.V., Maisuradze J.P.,
Petriashvili G.Sh., Zurabishvili Ts.I., Sepashvili N.O., and Mzhavanadze I.A.
V. Chavchanidze Institute of Cybernetics, Georgian
Technical University
Abstract. It was
determined experimentally that the efficient photosensitivity of the
cholesteric liquid-crystal composition doped with long-radical spiropyrans to
UV radiation exceeded that of the composition doped with short-radical ones.
This is likely to be caused by the fact that, in the presence of the long alkyl
radical at the nitrogen atom, the merocyanine form of the spiropyran molecule
with a lyophilic zwitterionic head and a lyophobic nonpolar tail is amphiphilic. Under certain
conditions, the molecules of this kind self-organize into micelles, which
disturb the thermodynamic equilibrium in the basic solution. For restoring the
thermodynamic equilibrium, merocyanine molecules add to the photoinduced
merocyanine ones, which
eventually increases the number of absorption centers.
Keywords: spiropyran,
merocyanine, liquid crystal, micelle, photochromism.
SUMMARY
SELF-STRUCTURING IN SPIROPYRAN-CONTAINING COMPOSITIONS
Japaridze K.G., Devadze L.V., Maisuradze J.P., Petriashvili G.Sh.,
Zurabishvili Ts.I., Sepashvili N.O.,
Mzhavanadze I.A., Akhobadze Sh.A. and Gugava
M.T.
V. Chavchanidze Institute of Cybernetics, Georgian
Technical University
The merocianine form of
6-nitro-2H-chromene-2-spiro-2'-1'-tetradecyl-3'3'-dimethylindoline
is an amphiphilic molecule with a liophilic head and a liophobic tail. Such
molecules in the nematic-chyral liquid crystalline environment are self-structuring
as micelles, the concentration of which is in correlation with the helical
pitch. It is possible to determine the concentration of colored molecules by the position of Bragg reflection band.
Key words: spiropyran,
merocianine, liquid crystal, self-structuring.
THERMOCHROMIC PROPERTIES OF
THE SILVER NANOPARTICLES AND ORGANIC LUMINESCENCE
DYE-DOPED POLYMER NANOCOMPOSITE
Petriashvili
G.Sh., Chanishvili A.G., Aronishidze M.N., Tavzarashvili S.P.,
Tevdorashvili K.G. and Pondjavidze N.T.
V. Chavchanidze Institute of Cybernetics of Georgian
Technical University
Keywords: polymer
nanocomposite, nanoparticles, organic luminescence dyes, thermochromic properties.
SUMMARY
INFLUENCE OF
In2Te3 ON
THE THERMOELECTRIC PROPERTIES OF THE MONOCRYSTALS OF Bi2Te2.80Se0.20 SOLID SOLUTIONS
Jabua Z.U. and Sveshnikova E.V.
Georgian
Technical University
Institute of Metallurgy, Russian Academy of Sciences, Moscow
The technology of growing the monocrystals of Bi2Te2.80Se0.20
solid solutions doped with In2Te3 by the Chokhralsky method with the feed from
a liquid phase was developed. The thermoelectric properties of the obtained monocrystals were
studied. As a result, the
Bi2Te2.80Se0.20 solid
solution doped with 0.1 mol. % In2Te3 with high thermoelectric efficiency is
recommended for using in thermorefrigerators in the temperature range of
250-350 K.
Keywords: monocrystal, solid solution, doping,
termoelectric capacity.
INVESTIGATION OF DESORPTION OF THE POROUS POLYMER
SATURATED WITH DIFFERENT OIL FRACTIONS
Gelashvili N.S., Molodinashvili Z.F., Papava K.R., Dokhturishvili N.S.,
Maisuradze N.A., Khetsuriani N.T. and
Sherozia V.A.
Petre Melikishvili Institute of Physical and Organic Chemistry, Iv. Javakhishvili Tbilisi State University
Abstract.
Hybrid porous polymers of a new
type based on amide-type oligomers and modified natural mineral sorbents were
obtained. The obtained polymers are characterized by high sorption and the
capability of floating together with sorbed substances on the water surface.
They can be removed mechanically from the water surface together with sorbed
oil products. The hybrid porous polymers are characterized by high selectivity,
fire resistance, and the possibility of varying the properties in a wide range
depending on the structure and ratio of initial substances. The obtained sorbents are characterized by
the ability of regeneration after desorption, which allows their multiple use.
Keywords:
porous polymer, hybrid,
oligomer, natural sorbent, oil fractions.
INVESTIGATION
OF OIL FROM SOME NEW WELLS IN GEORGIA
Khetsuriani N.T., Molodinashvili Z.F., Shavgulidze G.G.
and Svanidze T.F.
Petre
Melikishvili Institute of Physical and Organic Chemistry, Iv.
Javakhishvili Tbilisi State University
Georgian
Association of Oil Chemists
Abstract. The article
deals with the prospects of development of oil industry in Georgia. The foreign
companies operating in Georgia and their role in extraction of oil are
discussed. The chemical-physical properties of the oil from new wells of
Satskhenisi and Norio Deposits were studied. The yield of light fractions made
up 98%. The oil from both deposits represents an excellent raw material for
production of commercial economy oil products.
Keywords: oil
industry, production, processing, prospects.
ON THE
PROBABILITY OF FLASH FLOODS IN THE LOWER KURA
Ahmedov A.A.
Azerbaijan
National Aerospace Agency, Baku
Abstract. The paper deals with flash floods, the Lower Kura dam and
the analysis of the risk of the river bank-protecting structure break. The risk
analysis covers hazard sources, pathways and vulnerability of receptors,
creation of the database for pre-flood measures and flash flood emergency
management at the Kura downstream valleys.
Keywords: flash flood, preventive
measures, bank-protecting structure, dam break.
SUMMARY
CLARIFIER WITH A SUSPENDED SILT LAYER FOR DESILTING AND WASTE WATER
CLARIFICATION
Zalikashvili Z. O. and Zalikashvili G. O.
Georgian Technical University
The article deals with the clarifier with a suspended silt layer for
desilting and waste water
clarification. It is shown that the clarifier operates properly
only after preliminary separation of the bulk of activated sludge.
Keywords: clarifier,
activated sludge, waste water.
IDENTIFICATION
OF SOME STILBENOID GLUCOSIDES FROM SAPERAVI GRAPE JUICE (VITIS VINIFERA L.)
Bezhuashvili M.G., Elanidze L.D. and Okruashvili D. Sh.
Agricultural University of Georgia
Jakob Gogebashvili Telavi State University
Abstract. For the first
time in Georgia, in the juice of Saperavi grape cultivar trans-piceid glucoside of trans-resveratrol (4i, 5-dihydroxy-stilben
3-O-b-D
- glucopiranoside) (polydatine) and ε-viniferin glucoside were
found. The identification was performed by acid hydrolysis, thin-layer and high-performance
liquid chromatography, and UV -spectroscope using individual trans-resveratrol
and ε-viniferin.
Keywords: trans-piceid,
trans-resveratrol, ε-viniferin, grape juice.
SUMMARY
INVESTIGATION OF THE COMPOSITION OF BUTADIENE-STYRENE
THERMOPLASTICS FOR THE ORTHOPEDIC FOOTWEAR BOTTOM AND OPTIMIZATION OF THE
PROCESS-DEPENDENT PARAMETERS OF THEIR STRUCTURING
Shalamberidze M.M.,
Grdzelidze M.G. and Tatvidze M.L.
Akaki Taereteli State University, Kutaisi
The results of the investigation of the effect of latent hardener LO-3 on
the strength of butadiene-styrene thermoplasatics and the process-dependent
parameters of structuring of linear polymers are presented. In the course of
the experiment, the optimal values of the factors affecting the strength of
polymer compositions were found. The obtained results served as the basis for
preparation of a polymer mix for the orthopedic footwear bottom.
Keywords: butadiene-styrene
thermoplasatics, structuring, process-dependent parameters, optimization,
orthopedic footwear.
SUMMARY
INVESTIGATION OF THE HEAT-SHIELDING PROPERTIES OF ORTHOPEDIC FOOTWEAR
Shalamberidze M.M., Grdzelidze M.G. and Tatvidze M.L.
Akaki Taereteli State University, Kutaisi
The article deals with the heat-shielding properties of
orthopedic footwear. It is demonstrated that, knowing the thermophysical
properties of footwear materials, the ambient temperature and the heat flow of
the feet, we can determine the temperature in any part of the footwear by the
derived equations.
Keywords: orthopedic
footwear, heat-shielding properties
SUMMARY
MEDICINAL TEXTILE AND THE DIABETIC FOOT
Buadze E.P., Pailodze N.R., Bochorishvili R.I., Abuladze
N.B. and
Shengelia I.Sh.
Akaki Tsereteli State University, Kutaisi
This article is a review of the state-of-the-art in the
field of the diabetes rate in the world. Some methods of treatment of the
diabetic foot used in different countries are discussed. The emphasis is made
on the methods using textile materials that are given necessary specific
properties. A novel method of treatment of the diabetic foot by using local
Georgian materials is proposed.
Keywords: textiles, medicinal tissues, diabetes, diabetic foot.