ON THE APPLICABILITY OF INFORMATION TECHNOLOGY TO THE
ESTIMATION OF THE NONSTATIONARY PULSE TRANSITIVE MATRIX IN CONTROLLED
MULTIVARIATE DYNAMIC PROCESSES
Odisharia G.B., Kukhalashvili N.K., Kasoshvili K.N. and Odisharia
D.A.
I.Vekua Sukhumi Institute of Physics and
Technology
Abstract: The work deals with the investigation of main
properties of the estimation of the nonstationary
pulse transitive matrix corresponding to nonstationary
differential models of controlled multivariate processes. Earlier similar
investigations were performed for stationary differential models.
Keywords: information technology, pulse transitive matrix, nonstationary differential models, controlled multivariate
processes.
THE RESULTS OF ESTIMATION OF THE NONSTATIONARY
PARAMETRIC MATRIX IN CONTROLLED MULTIVARIATE DYNAMIC PROCESSES BY USING
INFORMATION TECHNOLOGY
Odisharia G.B., Kukhalashvili N.K., Kasoshvili K.N. and Odisharia
D.A.
I.Vekua Sukhumi Institute of Physics and
Technology
Abstract: The article deals with the investigation of main properties of the
algorithm estimating the parametric functions matrix corresponding to nonstationary differential models of processes for the case
when the parameter factors of control vector components are taken arbitrarily.
Keywords: information technology algorithm, estimation, nonstationary
parametric matrix, controlled multivariate process, nonstationary
dynamic model.
SUMMARY
Correction of single errors in the 5B6B line code
Iremashvili G.N., Nanobashvili D.V. and Nanobashvili
V.V.
Georgian
Technical University
The
issues of correction of singular errors within the 5B6B
line code are considered. It is shown that the introduction of minor
superfluity into the line signal allows correcting 20% of single errors and
thus improving the quality characteristics of fiber-optical telecommunication
systems.
Keywords: 5Â6Â
line code, disparity, allowed combinations; forbidden combinations, single
errors, detection, correction.
Summary
Information Support to
Entrepreneurs
Tchogovadze G.G., Prangishvili A.I., Didmanidze V.A., Strizhevsky V.S. and Kvantaliani N.A.
Georgian Technical University
The
Georgian Technical University (GTU) is considering the establishment of the
Institute of Support to Entrepreneurs , which will train students of
different specialities of the GTU in the practical
knowledge, helping to open own business (a small enterprise). In the future
this Institute should open trainings on this business for all interested
people. In the given work the environment which realizes all information
demands, characteristic of small-scale business and supports the training
process is considered.
Keywords: entrepreneur,
business, training, information support.
SUMMARY
PRESENT-DAY
ASPECTS OF DATA
TRANSMISSION NETWORKS
Kiknadze M.G., Gvaramia
E.G. and Davitashvili I.A.
Georgian Technical University
Present-day
aspects of the construction of data transmission networks are discussed. The IP
Protocol is actually a standard for construction of such networks. Today the
primary attention is paid to the creation of common convergence networks,
capable of transmitting audio- and video-information. For creating such
systems, it is essential to resolve some problems. In this article, the ways of
resolving these problems are outlined. The principles to be observed for
transmission of the packet from the transmitter to the receiver without
distortion are described. The RSVP Protocol of redundancy and its basic
components are considered.
Keywords: data
transmission networks, redundancy, queueing.
SUMMARY
THE ANALYSIS OF THE STATE OF THE ART IN THE TECHNOLOGY OF INFORMATION
TRANSMISSION VIA POWER LINES. PART I
Kutubidze
B.V. and Partenadze M.H.
Shota Rustaveli
State University, Batumi
The
article deals with the possibilities for application of power mains to the
creation of local telecommunication systems.
Keywords: PLC technology, power network, information transmission, intelligent
systems.
SUMMARY
THE ANALYSIS OF THE STATE OF THE ART IN THE TECHNOLOGY
OF INFORMATION TRANSMISSION VIA POWER lines. PART II
Kutubidze B.V. and Partenadze M.H.
Shota Rustaveli State University, Batumi
The article deals with the hardware and equipment for development of
local telecommunication and management systems by using power mains.
Keywords: information transmission, power network, hardware, intelligent systems.
Biofield is the Characteristic Function of the Man’s
LIFE
Kadagishvili L.G.
V.
Chavchanidze Institute of Cybernetics
Abstract. Each living organism
has a developed bio-energetic system which is capable to receive and keep the
energy and to distribute it among the organs and separate cells. The biofield of a man as a physical structure is the expression
of vital capability of the organism. It is the result of self-regulation of the
internal energy, and it is susceptible to control and self-control. “The
pathological bio-field” is the result of the disease and not the cause, it is
secondary. It is possible to diagnose a disease by the disturbance of energetic
balance and hence to treat it. The treatment is effected both during the direct
contact with the patient and at the distance of hundreds of kilometers. The
treatment is realized as well by using various objects and water (so- called
charging).
Keywords: biofield, biocorrector, pathological biofield,
energetic balance, diagnostics.
SUMMARY
PECULIARITIES OF APPLICATION of
multiple-mode fiber
Kurdadze M.A. and
Elkanashvili D.V.
Georgian Technical University
In the article multiple-mode fiber is
discussed. The multiple-mode fiber was designed for the combined use with
light-emitting diodes. The efficacy of the use of light-emitting diodes as
transmitters in the standard Gigabit Ethernet is of primary importance. That is
why in this standard are used optical laser transmitters with multiple-mode
fiber. Interface 1000 BASE-SX for the use with multiple-mode fiber is
described. For stable interference-immune signal transmission, 5-level
impulse-amplitude encoding was elaborated. An additional field of the
frame-spreading of the carrier is described. Main technical characteristics of
the network card and the architecture of the buffer repeater are given.
Keywords: multiple-mode fiber, light-emitting diode,
signal transmission, impulse-amplitude encoding.
New methods of obtaining Of fine-Grained and nanosized composite materials
Okrostsvaridze O.Sh.,
Tavadze G.F. and Badzoshvili
T.V.
Ferdinand Tavadze Institute of Metallurgy and
Materials Science
Abstract. The work deals with the possibilities of obtaining
fine-crystalline materials by applying two-stage integrated technological
schemes: self-propagating high-temperature synthesis (SHS)+super-rate
tempering of the liquid melt and SHS+gas-flame
dispersion. As a result of spinning of the SHS-melt on a
fast-rotating copper drum, a quenching product of a lamellar shape is obtained.
The thickness of foil fragments is 30-60 mm. The electron-microscopic investigations showed that the dimensions of
phase constituents of the composite Al2O3-NiAl
(Ni3Al) varied from nano- to micrometric dimensions. At the same
time, there was observed heterogeneous distribution of Al2O3 and NiAl on the area of the direction of melt spinning, which pointed to
heterogeneity and non-stationary flow of high-temperature melt. For increasing
the ductility of microparticles, it is necessary to
clad the surfaces of powders or granulate them, as well as to select relevant
methodology of disintegration for providing the shape of particles maximally
approximated to the isometric one.
Keywords: self-propagating high-temperature synthesis, super-fast quenching melt,
composite, nanomaterials, tempering.
New ceramic and metal-ceramic powders for gas-thermal
coatings
Okrostsvaridze O.Sh.,
Tavadze G.F., Badzoshvili
T.V. and Alania J.G.
Ferdinand Tavadze Institute of Metallurgy and
Materials Science
Abstract. In
the presented work a new method of obtaining compound ceramic and metal-ceramic
composite powders by using the technology of self-propagating high-temperature
synthesis (SHS) is proposed. The investigations for establishing the
correlation between the parameters of original charge and the combustion
parameters – Tcomb and Ucomb
were performed. The morphological specific features, of the synthesized
composites were studied.
Keywords: self-propagating
high-temperature synthesis, powders, composites, properties, morphology.
SPECIAL FRITS FOR DIRECT-ON
ENAMELLING OF PIPELINES
Berdzenishvili I.G., Siradze
M.G., Erokhin V.V. and Kldiashvili
R.Sh.
Georgian Technical University
Ukranian Association of Enamelers
Abstract. The compositions of low-melting zirconium-strontium
frits have been developed for direct-on enamelling of
pipes. Owing to the given combination of active cations,
toxic fluorine and expensive nickel and lithium were eliminated from glass frit
compositions. The enamels were subjected to firing by the induction method. In
the synthesized enamels, the optimal complex of properties combining high
corrosion-resistant and thermo-mechanic indices, adhesive strength and required
specifications was realized. These enamels are recommended for testing on
pipelines.
Keywords: direct-on enamelling, frits,
coating, pipes, corrosion resistance.
SUMMARY
PRODUCTION AND INVESTIGATION OF THE NANOSTRUCTURE OF
COMPOUND Ga13(µ-OH)24(OH2)24](enH2)1.5·(NO3)18·12H2O
Miminoshvili
E.B., Kutelia E.R. and Beridze
L.A.
Georgian Technical University
The
structural analysis of the following compound was performed: Ga13(enH2)1.5(OH)24(NO3)18(H2O)36
(R-3, a=b=19.993 (3); c=18.493(4) Å; V=6401.7 (2) Å T=153(2)K, Z=3;
Dcom.=2.48g/cm3, µ(CuKα)=4.207mm-1). Its structural formula
was established: [Ga13(µ-OH)24(OH2)24](enH2)1.5(NO3)18·12H2O.
The obtained 13-cyclic cation by its geometric
dimensions can be related to nanoclusters.
Keywords: X-ray
diffraction analysis, X-ray phase analysis, synthesis, nanostructure, gallium
nitrate, ethylenediamine.
The contact fatigue and the wear of DADI class
aluminium cast iron
Kutelia E.R., Khidasheli N.Z., Beradze
G.V., Tsurtsumia O.G. and Beroshvili
I.A.
Georgian Technical University
Abstract. In
the present work the results of experimental investigations of contact fatigue
and wear of deformable high-strength aluminum cast iron of ADI (DADI) class
depending on the phase ratio in the metallic matrix are given. It is shown that
the modification of cast iron melt with the magnesium vapor allows obtaining
the low-silica (0.5-0.7% Si) high-strength cast iron in which the concentration
of sulfur does not exceed 0.002%. Besides, the type and the degree of austenite
transformation of the produced cast iron can easily be varied so that the
required ratio of phase components such as upper bainite,
lower bainite, martensite,
carbide and retained austenite could be provided in the metallic matrix and
hence could be achieved the desired hardness over the range of 30-57HRC. The rolling and
rolling-with-creep wear tests were carried out on the specimens of different
hardness. They showed strong dependence of the contact fatigue and the wear on
the amount of retained austenite in the specimens with the optimal ratio of bainite and martensite phase
components in the matrix structure. The obtained testing results allow us to
treat the high-strength aluminum cast iron of DADI class as an efficient
substitute for expensive steel in manufacturing the critical parts for
high-pressure multistep gas pumping compressors.
Keywords: ADI, plastic deformation, austempering, hot rolling,
wear, dry friction, fatigue, bainite.
SUMMARY
FABRICATION
OF POLYMERIC ULTRAFILTRATION MEMBRANES
Gotsiridze R.S., Mkheidze S.N., Mkheidze N.
P. and Pipaishvili M. N.
Research
Institute of Membrane Technology, Shota Rustaveli Batumi State University
In
this work the method of fabrication of polymeric ultrafiltration
membranes from the solution of polyvinylchloride in N-methylpirrolidone
is described. The porosity, sizes of pores and productivity of the polymeric
membrane obtained from the 18% solution of polyvinylchloride were determined.
The dependence of membrane transparency on the pressure applied and the optimal
working pressure of the membrane was established.
Keywords: polymeric
membranes, ultrafiltration, polyvinylchloride.
SUMMARY
Mathematical-Chemical Investigation of Organogermanium
Isocyanates within the Scope of the Pseudo-ANB-matrix method
Rusia M. Sh., Chachava
G.N. and Gverdtsiteli M.I.
Iv. Javakhishvili Tbilisi State University
Some
organogermanium izocyanates
were studied within the scope of the pseudo-ANB-matrix method. Two correlation
equations of the type ,,structure-properties” were
constructed and investigated. The calculation results showed that, according
to the Jappe’s criterion, the correlation was good.
Keywords: organogermanium
izocyanates, pseudo-ANB-matrix, correlation
equations.
SUMMARY
Mathematical-Chemical Investigation of normal Alkanes
within the Scope of
ANB- and Quasi-ANB-matrices methods
Chachava G.N., Gverdtsiteli M.G., Laperashvili
I.A. and Gverdtsiteli M.I.
Iv. Javakhishvili Tbilisi State University
Normal
alkanes were studied within the Scope of ANB- and
quasi-ANB-matrices methods. Six correlation equations of the type
“structure-properties” were derived and investigated. The calculations showed
that the correlation was good.
Keywords: normal alkanes, ANB-matrix, quasi-ANB-matrix, correlation
equations.
SUMMARY
MATHEMATICAL-STATISTICAL
ANALYSIS OF THE OUTPUT SIGNAL OF THE CONDUCTOMETRIC
BLOOD FLOW METER
Nikuradze
G.A., Museliani T.G. and Tsitskhvaia
I.S.
Georgian Technical University
A
principal circuit diagram of processing of measurement results was designed by
using stable estimation models and Freedman and Wilcoxson
tests. The experimental data were classified in accordance with four classes
forming the basis for construction of prognostic relationships. The
mathematical models of the conductometric blood flow
meter were constructed for four groups of electrolytic solutions.
Keywords: blood flow, conductometric flow meter, hematocrit,
electrolyte, signal processing, statistical analysis.
ON THE PROBLEM OF EMPLOYMENT OF THE POPULATION OF THE CHIATURA REGION
Makharadze A.I., Varsimashvili E.V. and Ikoshvili
J.V.
Akaki Tsereteli State University, Kutaisi
Institute of Geology
Caucasian Institute of Mineral Raw Materials
Abstract. The
work deals with the problem of employment of the population of the Chiatura Region. It is shown that the exploration of
nonmetallic mineral resources and building up of production on their basis in
this region is of primary importance for employment of the local manpower
released as a result of reduction in the existing mining industry, at the
exploited manganese deposit.
Keywords: employment, mining industry, nonmetallic
mineral resources.
Ways of preventing the
emissions of substances causing
ozone layer depletion
Kvinikadze L.Z. and Suladze S.S.
Iv. Javakhishvili Tbilisi State University
Abstract. One of important measures aimed at the development of programs for
reduction of consumption of ozone-depleting substances is the collection of
data on the refrigerants used in the country and the development of the
technique of their quality evaluation. The work on collecting ozone-depleting
chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons
(HCFCs) from refrigeration and air-conditioning systems in various regions of
Georgia was performed. The standard composition of a refrigerant was restored,
which would prolong the operation time of the refrigeration equipment. This
approach is economically sound at the transition stage of usage of expensive
modern refrigerating systems.
Keywords:
ozone-depleting substances,
refrigerants, pollution, chlorofluorocarbons, global warming.
SUMMARY
SOME ISSUES OF TRANSITION OF GEORGIA TO THE WAY OF
STEADY PROGRESS IN THE SPHERE OF TECHNOGENIC AND ENVIRONMENTAL SAFETY
Zalikashvili Z.O., Giorgadze
P.Sh.,
Zakutashvili G.G., Verulava
G.Yu. and Zalikashvili G.O.
Georgian Technical University
The
article discusses the main directions ensuring the resolution of tasks of
steady progress of Georgia in the field of environmental safety. These main
directions are systematized and combined into three tasks to be resolved in a
sequence: renovation of ecological stability in the process of riding out the
today’s crisis; radical improvements in the state of the environment owing to
making economic activities more environment friendly in the scope of
institutional and structural reorganization; inclusion of economic activities
into the volume of country’s economy. For accomplishment of these tasks, it is
essential to work out a strategy of establishing the priorities and
distributing the efforts according to the levels of social-economic systems in
the country.
Keywords: steady
progress, environmental safety, technogenic safety,
strategy.
SUMMARY
FIRE-TECHNICAL EXPERTISE OF WIRING BY USING X-RAY
ANALYSES
Miminoshvili
E.B. and Pavliashvili T.G.
Georgian Technical University
With
the aim of performing the technical expertise, the copper wire subjected to
heat was analyzed by X-ray methods. The moment of short circuit, i.e. whether
it was primary or secondary, and the cause of the fire were
determined.
Keywords: copper
wire, short circuit, technical expertise, roentgenography.
PREDICTION OF THE KEEPING QUALITY OF APPLE FRUIT
Shapatava Z.G., Zhgenti M.S., Dzeria K.T. and Makhatadze M.P.
Institute of Horticulture, Viticulture and Oenology of Georgia
Abstract. The association between the content of calcium in
apples and their physiological diseases is discussed. Two apple cultivars,
Liberty and Golden Smooth, were studied. In the Liberty apples the tissue
around the pericarp is susceptable
to browning during storage, whereas the Golden Smooth cultivar is not damaged
by physiological diseases during storage. The content of calcium was high in
both cultivars: 9.0-13.8 mg/100g in the Golden Smooth apples and 8.4-11.6
mg/100g in the Liberty apples. In the Liberty apples, the tissue around the pericarp turned
brown after storage for 1-1.5 months when the content of Ca was less than 9.0 mg/100g, and after storage for 3-4 months when the content
of calcium was more than 9.0 mg/100g. The quantity of titratable
acidity decreased in both cases. It is shown that the development of disease
and hence the keeping quality of apples could be predicted by the content of
calcium and the cultivar properties. The role of calcium in the development of
physiological diseases is not confined to its quantitative parameter,
no less important is its stabilization in the protopectin
molecule and the percent composition of calcium compounds. In the apples of
Liberty cultivar, the process of ripening proceeds quite intensely. After
releasing calcium, the wall of the cell is damaged, and the conditions for
development of the disease are formed.
Keywords: apple, keeping quality, prediction, calcium, physiological
diseases.
EFFECTS OF PREPROCESSING ON THE QUALITY OF DRIED PLUMS
Shapatava Z.G., Dzeria K.T., Zhgenti M.S. and Melanashvili N.O.
Institute of Horticulture, Viticulture and Oenology of Georgia
Abstract. The article deals
with the effect of preprocessing on the dried plum quality. Five plum varieties
were examined, namely Italian,
D’Agen,
Catherine, Shavkliava and Stanley.
The
contents of protopectin, cutin, epicuticular
and cuticular waxes in the plum exocarp were
identified. Based on the obtained data, the optimal blanching conditions
(caustic soda concentration and exposition time) were determined.
Keywords: dried plum,
quality, preprocessing, epicuticular wax, cutin, protopectin, exocarp, cuticular wax.
SUMMARY
THE
INFLUENCE OF MINERAL NUTRITION ON THE VITAMIN CONTENT IN GRAPE MUST AND WINE
Tsitsilashvili O.K., Khositashvili M.L., Tsiklauri
L.Z., Asashvili A.Sh., Asashvili T.Sh. and Kandelaki N.D.
Institute
of Horticulture, Viticulture and Oenology of Georgia
The influence of mineral elements (N, P, K) on the vitamin content in grape must and wine was
studied. The content of B1, B2, B3, B6,
H and PP vitamins in these objects was determined. It was established that
mineral nutrition influenced the quantitative and qualitative content of vitamins B6
and H. Particularly, under the influence of potassium, the content of pantoteinic acid (vit. B3)
increased in the grape must.
Keywords: wine, grape must, mineral nutrition, content of
vitamins.
SUMMARY
THE INFLUENCE OF POTASSIUM ON THE CONTENT OF TANNIN,
PECTIN, HYDROPECTIN AND GLYCEROL IN GRAPE MUST AND WINE
Tsitsilashvili O.K., Khositashvili M.L., Asashvili
T.Sh.,
Oshakmashvili Ts.L., Vibliani M.M. and Kandelaki N.D.
Institute of Horticulture, Viticulture and Oenology of
Georgia
The
influence of potassium fertilizer on the quality of grape must and wine was
studied. It was established that potassium influences the activity of pectolytic enzymes, the pectin and protopectin
conversion and the final wine product. Potassium limits the content of protein,
tannin, protein tannate, aldehyde
tannate and other substances as well. Thus, K
determines the quality of wine.
Keywords: wine,
grape must, quality, potassium, fertilizer, tannin, pectin, glycerol.
The INFLUENCE of potassium deficiency ON THE VINE
METABOLISM and WINE QUALITY
Tsitsilashvili O.K., Vibliani M.M.,
Asashvili T.Sh., Khositashvili T.V., Tsiklauri L.Z. and Kandelaki N.D.
Institute of Horticulture, Viticulture and Oenology of Georgia
Abstract. The effect of
potassium deficiency on the metabolism of grape vine was studied. For creating
the K deficiency, grape vine cuttings were washed from mineral elements by
passing through them a lot of distilled water under pressure. After rooting,
the shoots were placed in nutrient solutions containing potassium or without
it. It was established that the K deficiency inhibited the growth of roots by
50-60% and of the overground mass – by 40-50%. Some
aspects of the effect of K deficiency in the grape vine on the quality of
grapes and wine were considered.
Keywords: grape vine, wine,
potassium deficiency, vine metabolism, pectolytic
enzymes, tannin, aldehyde, protein.
SUMMARY
IMPROVEMENT
IN THE TECHNOLOGY OF FORREFINEMENT OF COTTON OIL IN CRUSHED COTTON
Siradze M.G., Berdzenishvili I.G., Kldiashvili R.Sh. and Neparidze N.S.
Georgian
Technical University
For improving the technology of forrefinement
of cotton oil in crushed cotton during
processing of low-grade cotton seeds, the effect of electromagnetic
field voltage used for treatment of the solution of soda ash prior to its
feeding into the moistening fryer on the acid number of raw press oil was
studied. It was established that the preliminary treatment of soda ash solution
in the electromagnetic field allowed reducing the acid number of raw oil in
crushed cotton after its pressing by a factor of 3 or 4, whereas the
traditional technology without treatment of the soda ash solution in the
electromagnetic field reduces the acid number of the raw oil by a half. The
influence of the proposed method of processing of crushed cotton on the protein
complex of cotton-cake was also studied. The investigation results showed that
the content of soluble protein had decreased insignificantly. At the same time,
the content of alkali-soluble fractions had increased, while the content of
water- and salt-soluble fractions had decreased.
Keywords: forrefinement, cotton oil, crushed cotton, cotton-cake, acid
number, soda ash, electromagnetic field.
SUMMARY
CONSIDERATION
OF DYNAMIC INCREMENTS TO ANTHROPOMETRIC FEATURES WHEN DESIGNING THE MILITARY
UNIFORM
Dolidze
N.A., Datuashvili M.V., Lursmanashvili
L.G. and Ugrekhelidze I.I.
Akaki Tsereteli
State University, Kutaisi
The
work deals with the issues of dynamic anthropology. The importance of dynamic
increments to anthropometric features when designing the military uniform is
emphasized, as servicemen make complex movements executing their professional
duties. For the purpose of determining the dynamic increments to size features
of servicemen, a program of dynamic anthropology was developed. The
investigation showed that the dynamic increments depended on the character of
movements. The maximum increment was equal to 10.5 cm. The obtained values of dynamic
increments to servicemen’s size features were taken into consideration in
designing of military uniform.
Keywords: military
uniform, design, anthropometric features, dynamic increments.
BIOLOGICALLY ACTIVE SUBSTANCES IN FRUIT-BERRY
JUICES PRODUCED BY CONCENTRATION OF POLYPHENOLS
Ebelashvili N.V., Jorjikia
N.G., Sikharulidze T.M., Bagashvili
I.A. and Makhatadze M.P.
Institute of Horticulture, Viticulture and
Oenology of Georgia
Abstract. The content of biologically active substances was determined in the test
and control samples of black mulberry, blackberry and cherry juices. The test
samples were prepared by the technology developed by the authors – by
concentration of polyphenols, and the control samples
– by standard technology. The content of phenolcarboxylic
acids, catechols and organic acids was determined by
the instrument Pro Star, Varian, and the content of mineral substances (K, Ca,
Na and Mg) – by the atomic absorption spectrometer (Perkin Elmer). The
investigation results showed that the total quantitative content of the
abovementioned biologically active substances was much higher in the test
samples than in the control ones, prepared by the standard technology.
Keywords: biologically active substances, fruit-berry juices, concentration of polyphenols.