SUMMARY
SOLUTION OF THE BOUNDARY
PROBLEM ON HEATING OF THE SEMICONDUCTOR PLATE IN THE INTEGRATED CIRCUIT
Morozov V.P. and Babayan R.R.
V. Trapeznikov
Institute of Control Problems, RAS, Moscow
The paper deals
with a mathematical model describing the heat processes of heat
propagation and heat removal in the integrated-circuit substrate.
Keywords: integrated
circuit, heat processes, mathematical model, substrate.
ON THE KARAMATA’S FUNCTIONS
Skhirtladze I.A. and Skhirtladze
N.I.
V. Chavchanidze
Institute of Cybernetics
of the Georgian Technical University
Abstract. Karamata’s weakly oscilated
functions are used for estimation of Fourier coefficients.
Keywords: weakly
oscillated functions, modulus of continuity.
SUMMARY
PROBLEMS OF THE FREELY
RESTING THICK PLATE WITH CONSIDERATION FOR THE THERMAL FIELD
Ozbetelashvili N.B.
Georgian Technical
University
The paper deals with the problems of bending of the freely resting
thick plate with consideration for the thermal field. In this case, the obtained
exact solutions allow improving the so-called technical theories. It should be
taken into account that asymmetric load is applied to the upper and lower
bases, because only in this case we have a free middle surface in the
three-dimensional theory.
Keywords: bending, thermal
field, three-dimensional theory, thick plate, isotropic body.
SUMMARY
CODE CONSTRUCTIONS BASED
ON SIMPLEX SIGNALS
Ugrelidze N.A. and Kvikvinia
T.N.
Georgian Technical
University
Signal-code constructions, based
on two-dimensional simplex signals and 3-ary convolutional codes with alphabetic redundancy are discussed. Their distance spectra
are presented and corresponding error probabilistic characteristics are
calculated. Coding gain for the real physical channels reaches 6 dB.
Keywords: code, signal,
channel, modulation, Gaussian noise.
SUMMARY
DETERMINATION OF THE POWER
OF DISTORTION ON THE BASIS OF THE RESULTS OF EXPANSION OF VOLTAGE AND CURRENT
CURVES INTO FOURIER SERIES
Museliani T.G., Katamadze
I.E. and Bakhtadze M.G.
Georgian Technical
University
Based on the theory of electric ciruits, an
expression for calculation of the power of distortion in electric circuits
without preliminary determination of total, active and reactive power was
derived. This expression allows determining the power of distortion by the
results of expansion of voltage and current oscillograms
into Fourier series. It makes possible to analyze the processes proceeding in
electric circuits.
Keywords: electric
circuit, power of distortion, voltage, current, oscillogram,
Fourier series.
SUMMARY
INVESTIGATION
OF THE MECHANICAL-TECHNOLOGICAL PARAMETERS OF THE TECHNOLOGICAL MODULE OF THE
BRIDGE MECHANISM
Purtskhvanidze G.N. and Purtseladze I.G.
Akaki Tsereteli State University, Kutaisi
The paper deals with the investigation of
basic mechanical-technological parameters of the technological module of the bridge
mechanism and the basics
of design of the corresponding units.
Keywords: technological
module, trolley, operating forces, frictional force.
NANOSTRUCTURED III-V
SEMICONDUCTOR SOLAR CELLS
Laperashvili T.A., Kvitsiani O.R. and Elizbarashvili M.O.
V. Chavchanidze
Institute of Cybernetics
of the Georgian Technical University
Abstract. The III-V semiconductors are very promising materials for solar
cells. Compound GaAs has a close- to- ideal bandgap to reach the maximum possible efficiency limit for
single-junction solar cells. Direct-bandgap III-V
semiconductors GaAs, InGaP
and InGaN strongly absorb light,
and they are used for fabrication of multijunction
solar cells. Currently the application of nanotechnology gives a possibility to
design new- generation devices based on nanostructure (quantum dots, nanowire,
quantum well) absorbers. In this paper, the basics of solar cells are described
and a review of recent works is presented and critical issues on the
improvement efficiency of the nanophotovoltaic solar
cells are discussed. The photovoltaic cell based on GaP
is proposed.
Keywords: solar cells, III-V semiconductors, liquid phase epitaxy, bandgap, efficiency.
SUMMARY
STUDY ON THE EFFECT OF HOT PRESSING P–T
PARAMETERS ON THE HARDNESS OF Co-Cu-Sn,
Cu-Sn AND Cu-Sn-Ni ALLOYS
WIDELY USED AS BINDERS IN DIAMOND COMPOSITE MATERIALS
Avalishvili Z.A., Tserodze
M.P., Dzidzishvili I.G. and Loladze
N.T.
Georgian Technical
University
The paper presents the experimental data showing the effect of hot
pressing thermodynamic
(P-T) and kinetic (
) parameters on the hardness of sintered samples of
Co-Cu-Sn, Cu-Sn and Cu-Sn-Ni compositions. A particularly significant effect of the
content of Sn and Ni on the hardness and the
temperature of formation of the liquid phase was revealed.
Keywords: hot pressing,
Co-Cu-Sn-Ni compositions, hardness.
SUMMARY
SOME TECHNOLOGICAL
CHARACTERISTICS OF A NEW COATED ARC-WELDING ELECTRODE
Khutsishvili M.G., Sulamanidze
A.K., Dadianidze G.A. and Nikolava
O.I.
Georgian Technical
University
New coated electrodes for manual arc welding
characterized by good technological indices. When the unmelting tip of the new coated electrode comes in contact
with the basic metal, the loop is readily closed, and the arc is generated, the
second initiation of the arc is expected. The slag formed during welding gurantees proper formation of the weld and is easily
removed after cooling. The burning-out and splashing losses suit the
requirements. There are not observed cracks, peeling or surface pores in the
weld.
Keywords: arc welding,
coated electrode, technological characteristics.
SUMMARY
THE EFFECT OF THICKNESS CORRELATION OF WELD PARTS ON THE SPOT
LOCATION
Sulamanidze A.K., Kapanadze M.B. and Metreveli A.B.
Georgian Technical University
On the basis of reference
sources, the following inference was made: from the moment of imbalance of
thickness to a certain value of correlation δ2/δ1>1, the liquid core gradually
shifts into the thickness of the thick model; and it later forms in the middle of
summary thickness of welded samples. With an increasing certain value of
thickness correlation, the liquid core returns back and it may come up to the
surface of the thin model.
Keywords: spot welding, liquid core,
electrode, hard mode, soft mode, density.
SUMMARY
PECULIARITIES OF THE
DEVELOPMENT OF ENERGY-SAVING TECHNOLOGY FOR PRODUCTION OF THE METALLIC NET
Ospanova S.M., Zivzivadze
L.B. and Shalamberidze M.Sh.
Akaki Tsereteli State University,
Kutaisi
The paper deals with the development of energy-saving technology of
electric resistance welding of the reinforcement of reinforced concrete
constructions. It is shown that, with electric resistance welding, the strength
of welded junctions and the absence of metal splashing during welding must be
the quality indices.
Keywords: resistance
welding, reinforcement, reimforced concrete
construction.
SUMMARY
A NEW THERMODYNAMICALLY CORRECT
MODEL OF DISTRIBUTION OF FUEL CONSUMPTION ON THE PRODUCTION OF THE
THERMOELECTRIC PLANT
Arabidze N.T., Arabidze M.T. and Grigalashvili A.Sh.
Georgian Technical University
The `exergetic~ method of distribution of fuel
consumption takes into consideration both laws of thermodynamics. Hence, the
development of a correct model of the distribution of fuel consumption on the
production of the thermoelectric plant is an important and interesting task.
Keywords: exergetic method, thermoelectric plant, fuel consumption,
thermal power.
SUMMARY
ASSESSMENT OF THE READINESS INDEX
OF NATURAL GAS REGULATORY STATIONS BASED ON NATURAL DATA
Namgaladze D.P. and Sanikidze G.M.
Georgian Technical
University
The paper deals with the assessment of the reliability of Gas
Regulatory Stations based on natural data. As is known, in the phase of
planning as well as during the exploitation, it is crucial to assess the
readiness index. In particular, the probability distribution density
function for the readiness index is defined for the case of uniform
distribution during proper work and normal restoration time.
Keywords: gas regulatory
station, readiness index, natural data.
SUMMARY
DETERMINATION OF THE
COEFFICIENT OF UNSTEADY FLOW HYDRAULIC RESISTANGE
IN MAIN PIPELINES
Namgaladze D. P. and Mandaria G.G.
Georgian Technical
University
Nonstationary hydrodynamic processes
belong to complicated physical events during which hydrodynamic parameters (rate
and pressure) change in time and space. The unsteady flow hydraulic coefficient
is often determined experimentally. Nowadays, the main reason for this fact is
that there is no complete and quite convincing theory. The experimental determination
of the unsteady flow parameters with real objects is discussed in this work.
Keywords: pipeline,
hydraulic resistance, unsteady flow.
SUMMARY
DEVELOPMENT OF THE
TECHNOLOGY OF RECOVERY OF HEAVY METALS FROM THE WASTE WATERS OF THE GALVANIC
PROCESS
Kurtskhalia Ts.S.,
Enukidze N.E., Simonia Z.Sh., Nadirashvili M.V., Chkhaidze N.V., Pavliashvili G.G. and Makhashvili K.A.
Grigol Tsulukidze Mining
Institute
Georgian Technical
University
The
paper deals with the recovery of heavy metals from the waste waters of
the galvanic process. For this purpose, electrodialysis with ion-exchange
membranes and cavitation were used. The developed technology provides: 1. Concentration of metals
from the waste waters, the concentrate volume being not more than 7-10% of the
water under treatment. 2. Recovery of metals from the concentrate as hydroxides,
which represent raw materials for pigment production; their purity degree is
90-97%. The proposed technology is practically waste-free.
Keywords: heavy metals, waste waters, recovery, galvanic process.
SUMMARY
TREATMENT OF THE CANCER OF THE
CERVIX OF THE UTERUS BY MITOMYCIN DEPOSITED ONTO A POLYMER: STUDY ON THE
CONTROLLED RELEASE OF THE MEDICINE
Badzgaradze S.A., Kupatadze
N.O., Tugushi D.S., Kutsiava
N.A. and Katsarava R.D.
Georgian
Technical University
The paper deals with the problem of designing and practical
use of the polymer biocomposite containing an anticarcinogenic preparation. Mitomycin
was used as an active agent in the biocomposite. The
problem of the controlled release of the medicine is discussed. The proposed biocomposite is designed for treatment of the cancer of the
cervix of the uterus.
Keywords: biocomposite, oncological diseases, mitomycin, cervix of the uterus, cancer.
SUMMARY
EVALUATION OF THE QUALITY OF
ALCOHOLIC DRINKS BY CONSTRUCTING THE QUALIMETRIC MODELS
Shatirishvili Sh.I., Zakalashvili G. N., Shatirishvili
I.Sh. and Lomtadze Ts.G.
Georgian Technical
University
JSC `Chandari~ Winery
On the basis of defining the carbonic mixture in the consistence of
Georgian ordinal cognacs, qualimetric models were constructed
by the gas chromatographic method. This provides a possibility of revealing the effects
of different factors on the quality of wine products.
Keywords: qualimetric model, wine, cognac, gas chromatography.
SUMMARY
NON-ALCOHOLIC DIABETIC BEVERAGES BASED ON GEORGIAN MINERAL WATERS
Karchava M.S., Silagadze M.A., Berulava I.O., Jinjolia Sh.R. and Pkhakadze N.M.
Akaki Tsereteli State University, Kutaisi
The paper deals with the prospects of optimization of the diet
of people suffering diabetes. The scientific and practical aspects of designing
the natural non-alcoholic beverages
for diabetics are discussed. The technology of production of natural `vitamineral~ beverages for diabetics was
developed. For production of the diabetic non-alcoholic beverages, Georgian
mineral waters, cultural and wild-growing fruit and berries and medicinal
plants with antidiabetic properties are used.
Keywords: non-alcoholic beverages, diet for diabetics,
Georgian mineral waters.
SUMMARY
BIOLOGICAL METHOD OF PLANT PROTECTION FROM ROOT ROT
Kanchaveli Sh.S.
Scientific Research Centre of the Georgian Ministry of
Agriculture
Plant root rot is one of the
main diseases that stands out for its harm.The method of biological protection is one of the most
effective among the measures of struggle against the root rot. For biological
protection, fungus antagonists, fungus – hyperparasites
and cross plant protection can be used.Trichoderma
family fungus were tested from fungus antagonists (T.viride, T.harzianum,
T.koningi) and biocatena
– a biopreparation of local production was prepared
on their strains. The latter was introdeced into the
root in the form of spore suspension and a good result was gained. From fungus hyperparasites, P.oligandrum
was tested, beet seeds were treated before sowing by its spore suspension. This
caused not only the restriction of phytopatogens in the
rhisosphere, but also the improvement of the
germination ability. During cross plant protection, young plants which were
weakened by nonvirulant strains got diseased that
caused the activisation of natural immunity of the
plant.
Keywords: plant protection, biological
method, root rot.
SUMMARY
FRUIT DISEASES DURING THE
STORAGE
Kanchaveli Sh.S.
Scientific Research Centre
of the Georgian Ministry of Agriculture
Basic fruit diseases during the storage are
discussed, stating the primary ecological requirements for each pathogen. It
was established that fruit is damaged in storage by a great deal of parasites;
the number of kinds of fungi registered under
these conditions exceeds 50. The main ones are the representatives of
genera: Monilia, Penicillium, Fusicladium, Gloeosporium, Botritis, Fusarium, Alternaria, Sporotrichum, Gloeodes, Leptothyrium
etc. It is shown that, during the fruit storage, the temperature rate is of
great importance. The temperature of fruit storage must be about 2 – 30 C
with a slight variation. Humidity in the storage must be relatively high (75 –
80%).
Keywords: fruit diseases, storage,
fungi, temperature, humidity.