SUMMARY
On the second boundary
problem for ordinary differential equations with random coefficients
Novozhilova E.G., Sokhadze G.A., Tkeshelashvili
A.S., Shatashvili A.D. and Fomin-Shatashvili A.A.
Donetsk
Economical-Humanitarian Institute,
Institute of Applied
Mathematics and Mechanics of the NAS of
The
second boundary problem for the second-order stochastic differential equation
with random coefficients is discussed. It is shown that the solution of such an
equation can be represented as the Daletski-Skorohod expanded stochastic
integral. The problem of equivalency of distributions of the solutions of two
such equations with determinate coefficients is discussed separately. The
explicit form of Radon-Nikodim density is written out.
Keywords: stochastic
equation, expanded stochastic integral, Radon-Nikodim density.
On a measure transformation on the Hilbert cube
Beradze
M.S., Mnatsakanyan M., Oniani G. and Sokhadze G.A.
The
transformation of measure movement on the infinite-dimensional Hilbert cube is
discussed. For the product measures, the condition for absolute continuity of
measures at such a transformation have been established.
Keywords: absolute continuity of measures, Hilbert cube, measure transformation.
THE MECHANISM OF QUENCHING OF
TRIPLET EXCIPLEXES BY
AROMATIC DONORS OF HYDROGEN ATOM
Kokrashvili T.A., Kvintradze V.J. and Tsirekidze M.A.
Georgian Technical University
Kinetic and thermodynamic characteristics of triplets and triplet
exciplexes of quinones are discussed. It is demonstrated that the triplet
exciplexes are efficiently quenched by aromatic amines and phenol by means of hydrogen
atom transfer with formation of neutral radicals.
Keywords: triplet exciplexes, quenching, aromatic
amines, hydrogen donor.
HEAVY-ATOM EFFECT IN THE KINETICS OF INTERCOMBINATION ELECTRON TRANSFER IN POLAR TRIPLET EXCIPLEXES
Kokrashvili T.A., Tsirekidze M.A. and
Kvintradze V.J.
Georgian Technical University
A heavy-atom effect, which manifested itself
both in molecules and in polar triplet exñiplexes, was revealed. When heavy atoms were added to
reagents, the value of the velocity constant of electron
transfer increased significantly. In some systems, abrupt enhancement of the
heavy-atom effect was observed at a
slight increase in the medium polarity due to the change in the exciplex conformation.
Keywords: triplet exciplexes, electron
transfer, heavy-atom effect.
THE EFFECT OF SPECIFIC SoLVATION ON THE KINETICS OF REVERSE ELECTRON TRANSFER IN
POLAR TRIPLET EXCIPLEXES
Kokrashvili T.A. and Kvintradze V.J.
Georgian Technical University
It is demonstrated that the addition of small amount of MeOH can affect
quite significantly the velocity constant of
electron transfer. In this case, the corresponding dependences on the MeOH concentration
go onto saturation, which points to specific solvation of triplet exciplexes by
MeOH molecules.
Keywords: triplet exciplexers, electron transfer, triplet state,
solvation, kinetics.
Specific
features of disintegration and atomic ordering of body-centered and
face-centered cubic phases of Cu-40 at % Pd alloy
Kobakhidze G.M. and Kutelia
E.R.
Republican Center of
Structural Research, Georgian Technical University
The samples of Cu-40 at.% Pd alloy in the state of ordered and
disordered of body-centered (BCC) and face-centered (FCC) cubic phases were
studied by the methods of transmission electron microscopy. It is demonstrated
that after long-term annealing at the temperature below the ordering dome, the
alloy phase ordered similar to cesium chloride stratifies along
crystallographic planes {110} with the formation of plane zones rich in palladium
atoms. In FCC solid solution of the alloy under study, there takes place the
formation of fine areas (20-50 Å) of near ordering with their subsequent
transformation into microdomains with a new distant order inside the
microdomain.
Keywords: copper-palladium alloy, disintegration, lamination, near order,
vacancy, electron microscopy.
The impact of alternative current frequency on the
equations for motions of tracking systems with consideration of operating
characteristics
Bodokia
T.D., Abuladze V. Sh., Goniashvili E.S. and Chkadua N.V.
If the
alternating current frequency changes, there appear higher harmonic components
of voltage which increase starting torques and damping moments on the engine
winding. The starting torque, developed by each harmonic is reversely
proportotional to the harmonic number, whereas the damping moment is inversely
proportional to the square of the harmonic number. On the other hand, the
higher harmonic components of voltage on the engine winding result in heating
of the engine, which, in its turn,
causes the ohmic resistance of the rotor to rise and, thus, the engine torque
to decrease.
Keywords: alternating current,
frequency, motion equation, tracking system, operating characteristics.
The relation between surface
wave damping and the character of inhomogeneity of the conducting medium
Chogovadze M.E., Bzhalava T.L. and Jabua Z.U.
Georgian Technical University
The
possibility of determining the character of inhomogeneity of the conducting
medium by surface wave damping is discussed. It is shown that, by measuring
experimentally the damping decrement, it is possible to determine if the
conducting medium is inghomogeneous in the concentration of particles or in the
frequency of electron-electron collisions. The conditions under which a
correction to the damping decrement of homogeneous plasma is determined by
resonance absorption have been established.
Keywords: plasma, conducting
medium, inhomogeneity, surface waves, damping decrement.
investigation of the effect
of errors of measuring instruments on the properties of D- and A-optimality of
symmetric third-rder designs close to rotatable ones for two Variables
Zedginidze I.G. and Beraia N.O.
Georgian Technical Univrsity
The
change in D- and A-optimality of third-order sixteen-point designs close to
rotatable ones for two variables were studied at superimposion of errors from
0.01% to 10% with 0.01 increment, which
are characteristic of measuring instruments. The investigation was
performed for the squares of two dimensions. By each criterion under study,
corridors of errors for the squares of different dimensions were obtained. It
was established that, as the corridor of errors increased, the properties of
third-order designs close to rotatable ones for two variables became worse. The
degree of deterioration of the
properties under study was determined for each range of errors.
Keywords: experimental design,
rotatable designs, third-order designs, optimality.
Investigation of the property of orthogonality of
third-order designs close to rotatable ones for two variables under
experimental errors
Beraia
N.O. and Zedginidze I.G.
Georgian
Technical University
The
effect of different errors of measuring instruments on the property of
orthogonality of third-order sixteen-
and twenty-point designs close to rotatable ones for two variables was
studied. The investigation was performed for the errors which were most
characteristic of measuring instruments at different dimensions of the square.
The
simulation of the effect of measuring instrument errors on the abovementioned
properties of the design under study was performed by superimposing the random
numbers distributed by the normal law on the design coordinates. As a result,
depending on the desired accuracy of estimation of the coefficients of
regression, the experimentor can properly select the accuracy of measuring
instruments used for establishment of the levels of factors.
Keywords: experimental design, rotatable designs, third-order designs,
orthogonality.
on
the influence of natural oscillations of the plasmosphere on biological objects
Kereselidze Z.A., Modebadze
N.V. and Zhonzholadze T.I.
M. Nodia Institute of
Geophysics
J. Gogebashvili Telavi State
University
By using the space similarity of the day side of
Earth’s magnetosphere to its basic plasma basin - the plasmosphere, the
spectrum of natural hydromechanical oscillations of the plasmosphere, which has
the basic period comparable with the period of regular geomagnetic pulsations
Pc4, was determined. The influence of short-period geomagnetic pulsations and
ULF and VLF oscillations on the human organism is discussed. It is inferred
that, at mean latitude, the natural electromagnetic background including also
short-period pulsations of the frequency characteristic of the shortest
biorhythms along with ULF and VLF oscillations are favorable for biological
objects.
Keywords: plasmosphere, natural oscillations, biological
objects, geomagnetic pulsation.
INFLUENCE
OF DEFORMATIONS ON THE CHANGE in the WIDTH OF THE FORBIDDEN GAP IN EPITAXIAL
LAYERS OF AIVBVI SEMICONDUCTORS
Pashaev
A.M., Davarashvili O.I., Aliyev V.A., Enukashvili M.I. and Zlomanov V.P.
Iv.
Institute
of Physics NAS of
Ì.
On
the basis of the results of research of thin epitaxial layers Pb1-xSnxSe, Pb1-xSnxTe,
PbS1-ySey, grown by "hot-wall" molecular epitaxy, the conclusion is
made that, for the maximum increase of the width of the forbidden gap (due to
the influence of the deformations connected both with mismatch of the lattice
constants of the layer and the
substrate, and with the difference in the factors of thermal expansion),
the optimum is the growth of layers on the substrates with low density of
dislocations, at low temperature and under fast cooling. Thus, the critical
thickness of layers reaches the maximum value at nominal mismatch. The
performance of such technological tasks becomes an important condition for
resolution of a fundamental problem - transformation of narrow-band-gap AIVBVI
semiconductors into a dielectric state.
Keywords: deformation, band gap, IV-VI semiconductors, lattice mismatch, thermal expansion
.
SEMICONDUCTOR
MiCROSYSTEMS FOR SPIN ELECTRONICS
Kervalishvili
P.J., Chakhvashvili L.A. and Kervalishvili
M.P.
Georgian
Technical University
Abstract.
The aim of this paper is to give a brief overview of
recent advances in the area of semiconductor micro- and nanosystems, which
represent extremely promising applications for devices with the spin-polarized
transport of charge carriers. Based on the latest theoretical and experimental
achievements, it is shown that the development of diluted semiconductor-based
electronic microcomponents with controlled disorders is a prospective route for
production of novel spintronic devices.
Keywords. microsystem, spintronics, device, magnetic properties, spin-polarized
transport.
CATHODOLUMINESCENCE OF Nd3+ IONS IN γ – La2S3,
La2O2S AND La2O2
COMPOUNDS
Abutalibov G.I.,
Guseinov G.I. and Mamedov A.A.
Institute of Physics of Azerbaijan NAS, Baku
Abstract: The cathodoluminescence spectra of Nd3+
ions in γ – La2S3,
La2O2S and La2O2 compounds were
investigated. It was established that La2O2S is the most
effective basis for cathodoluminofor among these compounds.
Keywords: cathodoluminescence, neodymium ions, lanthanum
compounds.
Long-term
photoconductivity relaxation in Tm2S3 films doped with cadmium
Davitadze K.D.,
Luchkova L.I. and Jabua Z.U.
Some
regularities of long-term photoconductivity relaxation in Tm2S3
films doped with cadmium are discussed. The temperature, time and lux-ampere
dependences of the conductivity of doped films were studied. The experimental
results on the kinetics of photoconductivity showed that long-term processes
accompanied both the switch-off and the switch-on of monochromatic light. The
value of relaxation barrier was determined by analyzing the relaxation curves
of residual conductivity. The investigation of the energetic state of electron
transition from compensated deep acceptor levels to the impurity zone allowed
estimating the ionization energy of acceptor level formed by thulium vacancies.
Keywords:
thulium sulfide, film, long-term relaxation, photoconductivity, ionization
energy.
multilayer sensors of the
metal-dielectric-semiconductor type for controlling the leak-proofness of
alkali-metallic circuits of power plants
Kadaria
M.A.
I.Vekua
Sukhumi Institute of Physics and Technology
Multilayer
sensors of the metal-dielectric-semiconductor type for controlling the
leak-proofness of alkali-metallic circuits of power plants were designed. In
case of disturbance of leak-proofness of any alkali-metallic circuit of any
power plant, the proposed sensors provide not only the detection of the moment
of decompression (loss of sealing) of the circuit, but also simultaneous
utilization of leaking alkali metal, which prevents the pollution of the
environment with aggressive atoms of alkali metals and their toxic volatile
compounds with the components of the air.
Keywords: sensors, sandwich, alkali-metallic circuit, power plant, leak-proofness.
electron injectors with the LaB6 emitter
Dgebuadze G.N., Tsakadze L.M. and Chanturidze V.G.
I. Vekua Sukhumi Institute of Physics and Technology
An
injector for electron accelerators with the emitter unit of electron gun of end
geometry was designed and studied. It was established that the injector provided the generation of
electron beams with the current of ³ 500A at accelerating voltage of high-frequency field equal to 50 kV and
at current impulse train of 3.5 ms.
Keywords: electron injector,
emitter, electron gun.
correction of the disturbed biofield
Kadagishvili L.G.
Institute of Cybernetics
Abstract. By conceptual – heuristic
method. bioenergetic corrector – phenomenon Ms. Madona Jologua, was studied. There
were studied system processes for revealing the bioenergetic informational
fields, which determine the management and self-management processes of the
sensor system of the Phenomenon. The
problem of integrity, which is used during the correction of biofield, supports
the condition for considering the human
biofield as a regulating integrity of the system, i.e. we should consider the processes proceeding
in the human body as a united, integral system and as an integrity of the
processes proceeding in the system, but not as a simple sum of systems
(components). The integrity itself includes all kinds of internal relations
keeping it in the system (human) again. The disturbance in the system causes
diseases. The center of the disease is not localized absolutely; it affects
other organs as well. The human being as
a system is a natural integrity.
Keywords: bioenergetic
therapy, system research, euristic method, biofield, correction.
On
the part of geological factors in the
formation of earth’s climate
Aslanikashvili N.A. and Suladze A.I.
A. Tvalchrelidze Caucasian Institute of Mineral
Resources
It is assumed
that orbital and endogenous/depth processes are likely to be responsible for
climatic changes on the Earth (global warming, thinning of ozon screen, aridity
etc.) This assumption is attested by the fact that some deposits of mineral
resources (coal, phosphorites, rock salt. bauxites etc.) may be connected
directly with paleo- and present climatic zones. Based on processing of
statistical data, there were plotted the graphs representing the number and the
intensity of eruptions of volcanoes over the period of 1840-1998. When these
plots are compared with the climatological data, it is evident that there is a
functional (linear) relation between the global rise in ambient temperature and
the volcanic activity. Therefore, a widely spread, but not well-reasoned,
notion about technogenic-anthropogenic causes of global warming and the
adequacy of measures taken in this direction are open to question.
Keywords: climate, global
warming, geological factors, volcanic activity.
ON THE INTEGRATION OF THE BASIC ELEMENT IN THE FORM OF
A WAVEGUIDE TEE WITH AN INCORPORATED CYLINDRICAL DISCONTINUITY IN THE RESONANT
PART INTO UHF INSTRUMENTS
Kekelia G.V. and Kobiashvili F.G.
Georgian Technical University
A
problem of theoretical designing of the waveguide tee is discussed. The number
of input and output transmission lines was calculated. Practical matching of
waveguide branches is demonstrated. There is proposed a scattering matrix
corresponding to the structure under consideration.
Keywords: waveguide, tee, resonator, cylindrical
discontinuity, UHF instruments.
On the Lattice isomOrphisms of Hall’s Nilpotent
W-groups of class 2 and of lie algebras
Chabashvili
M.J.
Iv.
Javakhishvili Tbilisi State University
Lattice isomorphisms of Hall’s nilpotent W-groups of
class 2 and of Lie algebras are discussed. The analog of general theory of
projective geometry is justified. Relevant examples are cited.
Keywords: nilpotent groups, Hall’s groups, Lie
algebra, lattice isomorphism.
g-manganese
with transition 3d-metals
Berikashvili T.I., Gogua A.L., Gogua T.L. and
Kalandadze I.G.
It
is demonstrated that face-centered cubic (FCC) antiferromagnetic alloys of g
-manganese differ from paramagnetic ones in their structural properties. At
establishing the antiferromagnetic ordering of magnetic moments of manganese
atoms in those alloys, there emerge partially ordered tetragonal distortions.
The cubic lattice of these alloys is properly an averaged one. The condition
for complete ordering of tetragonal distortions is the temperature impact or
the impact of external deformation.
Keywords:
g-manganese,
cubic binary alloys, structural state, antiferromagnetic ordering.
The Composites Filled with Metal Nanoparticles on the
Basis of Polystyrene
Agladze T.R., Batsikadze M.G. and
Donadze M.A.
Georgian Technical University
Abstract. The electrochemical
method of production of metal-polymer composites is described. For production
of polystyrene composite filled with cobalt nanoparticles, a new method using a
mercury cathode was applied. The X-ray spectra and the sizes of cobalt
nanoparticles are given. There is also described the method of production of
manganese-polystyrene composite in the two-layer bath with a rotating cathode.
Keywords: composite,
polystyrene, nanoparticles, cobalt, manganese, electrolysis.
Determination of
vanadium (V) on the basis of indicator
system -
o-aminophenol-bromate-vanadium(V)
Dadianidze T.G., Dzotsenidze N.E., Dadianidze
A.G. and Kutateladze G.M.
Iv. Javakhisvili
Tbilisi state University
A
new kinetic method for determination of vanadium (V) is suggested. It is based
on the oxidation with o-aminophenol with potassium bromate. The optimal
conditions for indicat or reactions were established. By this method, the
content of vanadium (V) in model solutions and standard samples was determined.
The detection limit of vanadium (V) was equal to 1·10-2 – 5·10-4 mg/ml.
The accuracy of the method was 10-15%.
Keywords:
vanadium (v), indicator system,
quantitative determination.
Selection of complex
parts in the subgroup by the method of priority ordering for optimization of
cast bar parameters
Menteshashvili V.N. and Mamporia I.R.
In
the technological cycle of machine manufacturing, the optimization of the
parameters of cast bar production is an important issue. Such optimization
decreases machining allowance, increases the production output and improves the
operational characteristics of parts. The selection of complex parts in the
subgroup of cast bars, which is performed by the method of priority oediering,
is regarded as the initial stage of optimization of cast bar parameters. At the
next stage, the optimization of cast bar parameters is performed by the
selected complex part using the method of experimental design.
Keywords:
cast bar, complex part, parameter optimization, priority ordering.
Multilayer compositional coatings for pipelines and
tanks
Berdzenishvili
I.G.
Georgian Technical
University
Based on the principle of conformity of
materials, the technology for production of multilayer coatings for chemical
tanks and pipes was developed. In the developed coating, there is realized an
optimal complex of properties, combining high corrosion-resistant, thermomechanical
and smoothness characteristics typical of compositional and vitreous zirconium enamels of MES series.
Keywords: multilayer coatings, enamel, pipe, tank, corrosion
resistance, thermomechanical characteristics.
A
MATHEMATICAL MODEL OF INDUCTIVELY COUPLED ELECTRONIC CIRCUITS
Tsveraidze Z.N., Museliani T.G. and
Rochikashvili E.G.
Georgian Technical University
The
problem of mathematical modeling of inductively coupled electric circuits is
considered. It is demonstrated that, at deriving the equations for such
circuits, the following rules must be observed: 1. You must designate like
terminals and indicate relative positive decrections of current in relation to
these terminals: the same at accordant connection and opposite - at inverse
connection. 2. At deriving the equations, the emf of self-induction and mutual
induction induced by changes in magnetic flows (generated by the same currents)
must be taken with the negative sign (while the voltages - with the positive
sign) if the currents enter the like terminals. If the currents leave the like
terminals, the emf of self-induction and mutual induction must be taken with
the positive sign (while the voltages - with the negative sign).
Keywords: electric circuit, inductive coupling,
mathematical model.
Analysis of the system
of automatic sustaining of the optimal
depth of descent of the
cutting tool of tea-leaf harvester
in the raw material
layer
Machavariani G.A., Lezhava G.G., Kamkamidze
I.Sh., Berikishvili Z.I.,
Vardosanidze A.K. and Mkrtchyan E.M.
An
analog device for determination of the average height of spouts in the raw
material layer of tea bush is discussed. The average value of sprout height is
generated in the form of voltage at the reservoir capacitor. During the
operation of the device, the voltage at the reservoir capacitor tends to the
value of mathematical expectation of tea-bush sprout height.
Keywords:
tea-leaf harvester, raw material layer, depth sensor, cutting tool.
On the possibility of remote
control of electric-arc welding current
Sulamanidze A.K. and Dzodzishvili Z.G.
Georgian Technical University
The
possibility of remote control of welding current at manual electric-arc welding
by using a ballast resistor is discussed. The ballast resistor is proposed as a
device lacking electromagnetic inertia. With the help of the ballast resistor,
the accuracy of welding current control and the law of its change were determined.
The ways of improving the accuracy of preliminary control of the welding
current value are proposed. Relevant diagrams are presented.
Keywords: electric-arc
welding, welding current, ballast resistor, remote control.
investigation of the processes of applying the
magnetic markers of the sensor controlling directly the transport of aerial
tramway cabins
Chunashvili
B.M., Tugushi M.A. and Khakhiashvili T.G.
Georgian
Technical University
Dynamic indices of control systems of positional
electric drives of jig-back aerial tramways (JBAT) with intermediate supports
usually depend on the accuracy of the magnetic sensor controlling directly the
transport of cabins. In this article, it is shown that it is expedient to use a
magnetizing pulse transformer device (MPTD) with a capacitor power storage,
where the power form the capacitor bank is fed to the inductor via an
intermediate unit – a special pulse matching transformer, as a unit of applying
the magnetic markers of the abovementioned sensor. A set of differential
equations describing the transient processes in the discharge power circuit of
MPTD is given. The characteristic equation is analyzed, and the complex root
loci are presented. The analysis of curves shows that, at high values of
resistance of the inductor, its inductance hardly affects the
complex-conjugated roots and, hence, the character of the transient process.
Keywords: aerial tramway, transport of cabins, sensor, magnetic marker, transient
process, direct control.
The cyclogram of The process of arc welding and its
analysis
Sulamanidze
A.K. and Dzodzishvili Z.G.
Georgian
Technical University
The
cyclogram of experimental investigation of remote welding current regulator is
considered. The time characteristics of separate sections of the cyclogram and
their effect on the welding process are analyzed. It is demonstrated that the
remote regulator of welding current hardly affects the welding process, and
that it complies with the requirements of safety.
Keywords: arc welding, welding current, remote regulator, cyclogram, time
characteristics.
On the problem of synthesis of alternative alghorithms
of digital signature
Megrelishvili
R.P., Chelidze M.A. and Gnolidze T.V.
Iv. Javakhishvili
Tbilisi State University
Sukhumi
State University
There
are discussed available variants of construction of the algorithms of digital
signatures. As many other algorithms, these algorithms are obtained by simplification
of Gamal algorithm El. The main objective is to change the functionality of
some parameters. As a result, we obtain the necessary structural alternation.
Keywords: cryptography,
digital signature, algorithm, public key, signature protocol.
on a method of
revealing the expert priorities on a set of diagnostic criteria
Mikeladze M.G.
A
conceptual-probabilistic method of data processing is proposed. Along with the
introduction of the properties of essentiality and differentiation, the method
allows revealing and displaying the medical expert priorities among multiple
diagnostic rules.
Keywords:
data processing, priority ordering, diagnostic criteria.
The issues of
management of environmental-technogenic safety and the risks of emergency
situations by
Tsikhelashvili Z.I., Zakutashvili G.G.,
Akhvlediani T.A. and Verulava G.I.
The
issues of management of environmental-technogenic safety and the risks of
emergency situations by
·
Working-out and development of scientific-methodological
bases for management of risks of emergency situations.
·
Working-out of standard-legal and methodological bases
for providing the state and international control and standardization of risks
of emergency situations and for mitigation of the consequences of such
situations.
·
Development of economic tools for controlling the activities associated with decreasing the
risks and mitigating the consequences of emergency situations.
·
Designing of forecast and monitoring systems.
·
Designing of automated control systems, improvement of
communication and warning systems etc.
Keywords: environment protection, safety, risk,
emergency situation, safety function, risk function.
Decision-making under
undetermined factors of stochastic character for the problem of transformation
of the decision-taking system
Giorgadze G.P. and Lezhava A.P.
Georgian Technical University
Based
on the theory of statistical decisionsá some optimizations of and
approaches to decision-making under undetermined factors of stochastic character
for the problem of transformation of the decision-making system were developed.
There is given a statement of the problem of decision-making under uncertainty
determined by ignorance of the character of undetermined factors. The
expediency of changing from the matrix of winning to the matrix of risks as a
more favorable means of analysis for the problem of transformation of the
decision-taking system is discussed.
Keywords: decision-making,
uncertainty, optimization, undetermined factors, transformation.
application of optimizations of decision-making under
stochastic uncertainty to the problem of transformation of the decision-taking
system
Giorgadze G.P. and Lezhava A.P.
Georgian Technical University
In
the general case, the states associated with stochastic uncertainty of
different degrees are discussed. Among other states, the case when there is no
information about probable environmental conditions is considered. There are
given some optimizations of decision-making such as Wald’s maximum criterion, Savage’s
minimax criterion and Hurwitz’s pessimism-optimism criterion. These criteria
should be used for making the decision under stochastic uncertainty for the
problem of transformation of the decision-taking system.
Keywords: decision-making,
choice, transformation, uncertainty, optimization.
ON the
PERSONNEL MANAGEMENT IN SCIENTIFIC ORGANIZATIONS
Burduladze A.R., Magradze M.D. and Gabunia D.G.
Georgian Technical University
The personnel involved in scientific research
and development (scientific researchers) are team of professionals, whose
scientific work implemented on systematic background is aimed at the increase of the extent of scientific
knowledge and search for new applications of this knowledge. Four categories of such personnel are
specified: researchers, technicians, support personnel and other personnel.
In science especially, individual abilities of
workers and the quality of their education substantially contribute to achieving the success as
compared to other spheres of activities. Motivation plays a significant part in scientific
work, especially its classification and analysis of factors - motivations. Teamwork is one of the
peculiarities of scientific research work at present. Therefore, a thorough study of the issues of
establishing and operation of task groups is required.
Keywords: scientific workers, personnel management,
motivation.
Peculiarities of Evaluating and Using the Renewable
Energy Resources in High Mountainous Regions
Kobakhidze K. A.,
Chkhenkeli N. S., Kobakhidze L. K. and Bokuchava G. V.
Ilia Vekua Sukhumi
Institute of Physics and Technology
Abstract. There
are proposed new approaches to the evaluation and application of renewable
energy recources in high mountainous non-electrified villages - solar
radiation, wind energy and hydropotential of springs.
Keywords: renewable
energy, solar radiation, wind speed, hydropotential, mountainous regions.
Semi-rigid road pavement
structure for roads with heavy traffic
Burduladze A.R.,
Magradze M.D., Kachiuri B.I. and Bakuradze T.P.
Georgian Technical University
A semi-rigid road pavement
structure, which combines favorable characteristics of rigid and non-rigid road
pavements is proposed. The rigidness is
achieved by means of incorporation of a semi-rigid layer into the non-rigid
pavement. For this purpose, the compacted crushed - stone base or the gravel
base is impregnated with cement grout 5-7 cm in thickness, which is immediately followed by construction of
asphaltic - concrete pavement.
Keywords: cold asphalt concrete, emulsified bitumen,
semi-rigid pavement.
On the Phenomenon of architect enric miralles
Adjimyan D.S.
Georgian Technical University
This
article is dedicated to outstanding Catalan architect Enrique (Enric) Miralles
(1955-2000). There is given a brief overview of his life and activities in the
field of architecture, design and construction. Enric MIralles was the author
or a co-author of many prominent projects in different countries, including
Spain, Italy, Germany, Japan, the USA, the Netherlands, Scotland, Greece and
others.
Keywords: architecture, Enric
Miralles, design, construction, overview.
Some Aroma-forming
components of wine material for asuretuli dRy table natural-pink wine
Jigauri G.D.
Self-clarified
wine material produced form red variety of grape called Asuretuli Shavi (crops
of 2007) was studied. In the ether-pentane fraction of the wine material,
low-boiling and high-boiling aroma-forming substances were found. Among the
higher alcohols, isoamyl ones prevailed in the amount.
Keywords: pink wine, aromatic
components, chromatography.
Leucoforms of anthocyanidins in polymeric
proanthocyanidins of wine materials produced from commercial varieties and
hybrids - direct producers
Deisadze I.M.
Leucoforms of
leucoanthocyanidins of polymeric proanthocyanidins of red wine materials
produced frùm commercial varieties Saperavi, Otskhanuri Sapere
and Cabernet, and from hybrids - direct producers Vakirula, Dirbula (local
synonyms) and Isabella (VitisYabrusca)
were studied. Anthocyanidins, namely cyanidine and delphinidin, were revealed.
The content of cyanidine prevailed. The obtained results suggest using the
quantitative content, but not the qualitative composition, of proanthocyanidins
when judging about the purity of variety of red wine materials in reference to
the hybrids - direct producers.
Keywords: red wines, wine
materials, leucoanthocyanidins, proanthocyanidins, cyanidine, delphinidin,
quantitative content.
THE
FOAM-FORMING ABILITY OF TEA EXTRACT AND TABLE BEET JUICE
Kipiani
A.V. and Silagadze M.A.
The
processes of production of tea extract and table beet juice are considered. Their
surface-active properties were studied. The possibility of application of foam-
forming substances of vegetable origin for preparation of beaten- up
confectionery and semimanufactured goods is demonstrated.
Keywords: food industry,
foam-forming substances, tea extract, beet juice, confectioner’s goods.
Improvement in the
quality and the biological value of bread by adding the soya protein
concentrate
Zhorzholiani D.G., Grigorashvili G.Z. and
Kuparadze M.I.
Georgian Technical University
G. Natadze Institute of Sanitation and Hygiene
The
concentrate of soya protein produced from the local soya variety Imeruli by
using our technological method is rich in lysine and threonic acid and
therefore can be considered as a prospective protein source for enriching and
improving the quality of bread and bread products. The experiment was held on
small animals (white laboratory rats) for 28 days to study the effectiveness of
soya protein concentrate added to bread. The research showed that adding of 10%
of soya protein concentrate to bread increased the total amount of protein in
the product by 29%. The amount of lysine increased by 9%, isoleucine - by 5%,
leucine - by 7%, certain sulfur-containing amino acids - by 10%, aroma amino
acids, threonine and thripotophine - by 5%, valine - by 3%. According to these
results, it is shown more than clearly that the addition of soya protein
concentrate to bread products increased significantly the biological and
nutritive properties of those products. The experiments showed that feeding of
experimental animals with the bread containing the soya protein concentrate did
not cause any harm to their blood or inner organs. Therefore, it can be inferred
that the concentrate produced from local soya variety Imeruli can be added to
such a traditional and everyday nutritive product as bread in order to increase
its biological and nutritive value. In addition, this type of bread is
considered to satisfy all the requirements of rational diet.
Keywords: bread, soya, protein, nutritive additive, biological value.
Cracker-type bread from whole
germinated grain
Pruidze E.G., Khutsidze T.Z. and Khetsuriani G.S.
Akaki Tsereteli State University, Kutaisi
The
production process of small-weight cracker-like bread from whole germinated
grain is discussed. It is demonstrated that the investigation results obtained
by the authors allowed improving the quality of the product, which was enriched
with biologically active substances and vegetable fiber. The proposed product
is characterized by curative properties.
Keywords: bread, cracker-type
bread, whole grain, germinated grain.
Subtropical Persimmon –
A valuable raw material for production of the stuff of medicinal-prophylactic
purpose
Ardzenadze M.D., Kalandia A.G., Telia K.R. and
Abuladze V.I.
The
parameters of the process of production of concentrated diary products based on
the persimmon concentrate are described. The proposed products are of
medicinal-prophylactic purpose and are intended for children and adults. The
chemical indices and the energetic value of the products were determined. The
possibility of using the persimmon concentrates as additives of prophylactic
purpose is considered.
Keywords: persimmon, extract,
medicinal-prophylactic additive, production process.
Chemical composition of
spirit produced frOm persimmon fruit
Ardzenadze M.D., Kalandia A.G., Telia K.R. and
Bolkvadze V.I.
The
parameters of the process of production of ethyl alcohol (spirit) from
nonstandard subtropical persimmon fruit are described. The chemical composition
of persimmon alcohol is analyzed. The developed process of production involves the
following stages: crushing of fruit, heat treatment, production of juice,
alcoholic fermentation, filtration and rectification of spirit. The produced
spirit is characterized by low content of methanol and high-boiling alcohols.
Keywords: spirit, persimmon,
chemical composition, production process.
INVESTIGATION ON THE STRENGTH OF Thread CONNECTIONS OF HIGH-MODULE TEXTILE
MATERIALS
Datuashvili M.V., Dolidze N.A. and
Lursmanashvili L.G.
Akaki Tsereteli State University, Kutaisi
Based on the investigations carried out, it was
revealed that the durability of construction textile materials, made from high-module textile
fiber, operating under the action of heat radiation
is determined exactly by the strength of joining seams. Processing of the
investigation results showed that the
strength indices of thread connections generally depend on the kind of thread and the design of joining seams. For
increasing the strength and working
properties of construction textile
materials, there are given recommendations on using the seams of more complex designs.
Keywords: textile materials, high-module fiber, thread seams,
durability.
OPTIMIZATION OF POLYMERIC COMPOSITION FOR
THE BOTTOMS of ORTHOPAEDIC SHOES FOR
DIABETICS
Shalamberidze M.M.,
Kopadze Z.V. and Lomtadze N.Z.
Akaki Tsereteli State University, Kutaisi
The problem of optimization of polymeric composition for bottoms of
orthopaedic shoes for diabetics and of the
conditions of its production was studied. The obtained optimal results were
designed into the process of production of the abovementioned polymeric
composition and the manufacture of
orthopaedic shoes.
Keywords: orthopaedic shoes, polymeric composition,
optimization.
