STATISTICAL FOUNDATIONS OF the quality control OF
EDUCATION PROCESSes
Prangishvili
A.I., Milnikova I.A. and Dzidziguri G.A.
Georgian
Technical University
Abstract:
Statistical foundations of the quality control of education processes are discussed. A new approach to quantitative
evaluation of teaching process is proposed. The approach envisages two main
stages: 1. elaboration of unitary scaling systems for students grades and 2.
definition of quality standards. To realize the first stage the equating methodology, particularly,
equipercentile equating is used. The second one is represented by means of the
methodology of contingency tables. The methods allow: 1. comparing the
distribution of grades on the exams on
different subjects held at
different times and 2. specifying the quality standards and their confidence
levels on the base of the data on exam results for many years.
Keywords:
quality of teaching, statistical quality control, scaling, quality standards,
equipercentile equating, contingency tables, scaling.
A SYSTEM
OF INDICES FOR TEACHING REVIEW
Milnikova I.A.
Georgian Technical University
Abstract.
A new method of quantitative evaluation of teaching activities was is
elaborated. On the base of scores data, the method allows evaluating both the
efficiency of teaching within one group of students and comparative teaching
efficiency in two or more groups. As basic characteristics of teaching
efficiency, heterogeneity, stability and total variability indices were
introduced both for one group of students and for comparing different ones. The
method is easy to use and permits us to rank the results of teaching review,
which is one of the most important parts of general quality control in
education.
Keywords:
teaching review, heterogeneity, stability, total variability, degrees of freedom
DECOMPOSITION: A STRATEGY FOR QUERY PROCESSING IN DATABASES
Kobiashvili A.A.,
Khartishvili M.P. and Kiknadze Ì.G.
Georgian
Technical University
Abstract.
The idea of decomposition for optimization of relational database systems is
presented. The examples of decomposition
are discussed. One and two-variable query decomposition processes are
described. The transformation rule of the reduction process is presented.
Keywords: relational
database, decomposition, query.
CORRELATION
SPECIFICITY OF BASIC COEFFICIENTS FOR DISCRETE COSINE TRANSFORMATION OF IMAGES
Khuntsaria
J.M., Gogberashvili M.R., Machaladze R.I. and Jgamadze M.S.
Georgian
Technical University
The paper deals with the efficiency of
adaptive entropy coding, from the compression perspective, of the array of basic
coefficients of discrete cosine transformation of images based on their correlative
features recommended by JPEG and MPEG standards for efficient coding of immovable and movable images.
Keywords: image transformation,
correlation, discrete cosine transformation, adaptive entropy coding.
THE CHARACTERIZATION AND ANALYSIS OF MODERN ELECTRONIC BANK
SERVICES
Khatiashvili G.O., Tevdoradze M.T. and Lominadze T.N.
Georgian Technical University
The article deals with modern electronic bank services. The basic electronic services such as the
Internet bank, mobile bank, online payment and
online loans are discussed.
The analysis of
bank electronic services, their advantages and drawbacks are
presented. The trends of e-services are considered.
Keywords: electronic bank services, the Internet bank,
information risks.
MEASUREMENT
OF THE INVESTMENT EFFICIENCY
Magrakvelidze
D.G.
Georgian
Technical University
The article deals with the measurement
and estimation of the efficiency of investment measurement. It is emphasized
that there is a clear-cut distinction between the measurement and the
estimation of the investment efficiency. The measurement of the investment
efficiency consists in the determination of profitability achieved by the
investment manager in some period of time which is called the estimation
period. The estimation of the investment management efficiency pursues two
goals: 1) to determine whether the investment manager has obtained the results
better than the established standards;
2) to reveal how this results were obtained. In practice three ways of
averaging the profitability for a subperiod are used. In the result we get three characteristics:
1) average arithmetic profitability; 2) time-weighted profitability, which is
also called the average geometric profitability; 3) money-weighted
profitability
Keywords:
compositional analysis, profitability, investment management, investment
efficiency.
MARKOVITS’S
APPROACH TO THE CHOICE OF AN EFFECTIVE PORTFOLIO
Magrakvelidze
D.G.
Georgian
Technical University
There is an
infinite number of portfolios accessible
for the investor, but at the same time the investor should consider only those
portfolios that belong to an effective set. However, the Markovits effective set is a convex
line, which assumes the presence of an
infinite number of points on it. It means that there is an infinite quantity of
effective portfolios. Markovits
saw these potential problems and brought
the basic contribution to their overcoming, presenting a method of their resolution.
It mvolves the algorithm of quadratic programming known as the method of
critical lines.
Keywords: effective portfolio, Markovits effective set, quadratic programming.
DIFFRACTION OF THE TM WAVE INCIDENT WITH
A SLOPE ON TWO PARALLEL DIELECTRIC
CYLINDERS
Dekanosidze Sh.V., Robitashvili A.G. and
Shengelia M.A.
Abstract.
The article deals with the investigation of the diffraction of the plane TM
wave incident with a slope on two parallel dielectric cylinders. A dual system
of infinite algebraic equations was used for multipolar spectrum coefficients
of the scattered electromagnetic field. The system belongs to the class of
Fredholm-type systems, which makes possible the numerical realization of this
system by the reduction method using a computer.
Keywords: TM wave, diffraction, dielectric
cylinder.
ON
THE PROPAGATION OF RADIO WAVES IN THE CONTINUOUS HETEROGENEOUS MEDIUM
Dekanosidze Sh.V., Kevanishvili G.Sh. and
Meladze V.D.
The article deals with the propagation
of radio waves in the continuous heterogeneous medium.
It is
shown that the
characteristics of such
propagation in the geometric optic approximation can be described by the
method
of slowly changing amplitude, which yields
the same result as the well-known
VKB
method more easily.
The character of variations in the phase velocity of the wave and in the wavelength
during propagation was determined. A particular case of the layer
– the ionospheric layer, the permittivity of which obeys the parabolic law, is considered.
Keywords: radio waves, propagation, heterogeneous medium
THE
ELECTRODYNAMICS AND CALCULATION OF A THREE-LAYER DIELECTRIC
ANTENNA CASING
Kokrashvili G.T., Kokilashvili L.G. and Robitashvili A.G.
Georgian
Technical University
Abstract. An electrodynamic analysis of
the three-layer antenna casing with
different dielectric penetration was performed. The obtained quantitative ratios can be used for calculation of the numerical
values of reflection coefficients and the optimal mode of the casing.
Keywords:
antenna casing, dielectric, radome.
THE
ELECTRODYNAMICS AND CALCULATION OF A THREE-LAYER DIELECTRIC
ANTENNA CASING
Kokrashvili
G.T., Kokilashvili L.G. and Robitashvili A.G.
Georgian Technical University
Abstract. An electrodynamic analysis of
the three-layer antenna casing with
different dielectric penetration was performed. The obtained quantitative ratios can be used for calculation of the numerical
values of reflection coefficients and the optimal mode of the casing.
Keywords:
antenna casing, dielectric, radome.
OPTIMIZATION OF THE PARAMETERS
OF WORKING OF HOLES WITH A SPIRAL DRILL HAVING A SMALL DIAMETER AND A VARIABLE
INCLINATION ANGLE OF THE CUTTING FLUTE
Gviniashvili Z.M., Turmanidze R.S. and
Menteshashvili V.N.
The parameters of cutting of foiled boards with a spiral drill having a
small diameter (0.9 mm) and a variable inclination angle of the cutting flute
were optimized. From the factors affecting the process, the following were
chosen: the variable angle (30-350) of the cutting flute, the
cutting rate (90-110 m/min), advance (0.02-0.06 mm/rev.), the core thickness
(0.0142-0.0174 mm). The waste of the rear facet of the drill was adopted as an
output parameter. The matrix of execution of the experiments was worked out.
Based on the obtained results, the regression equation describing adequately
the production process was derived. Based on this equation, graphs of the wear
value versus relevant parameters were constructed.
Keywords: cutting flute,
variable angle, cybernetic model, experiment matrix, regression equation, optimization
of parameters.
PULSATING
DIFFERENTIALS
Varsimashvili
R. Sh., Kakhiani V.R. and Varsimashvili Z.R.
Georgian
Technical University
The article deals with the issues of
cross-country and turning capabilities of vehicles. For improving these
capabilities, the designs of pulsating differentials are offered. The designs
consist of spherical or ellipsoidal straight – cut gears and toroidal gears
being in engagement with the spherical/ellipsoidal ones. The offered
differentials provide the thrust variation in a wide range, blocking at
hauling, a high cross-country capability and a good turning capability.
Keywords:
vehicles, pulsating differential, gear, cross-country capability, blocking
coefficient.
ON THE DERIVATION OF
REPRESENTATIVE equations of ENGINEERING systems WITH ACCOUNT FOR the vibratiOn
EFFECT and their symbolic REPRESENTATION
on THE basIS OF mathcad
Bandzeladze B.R.
Akaki
Tsereteli State University, Kutaisi
The action of dynamic engineering
systems under simultaneous effect of power and kinetic vibrations is discussed.
The representative equations of the vibration were derived directly in a matrix
form. The problem is resolved by using the symbolic processor and graphic
editor Mathcad.
Keywords: engineering systems, representative equations, symbolic representation,
Laplace transformation, Mathcad.
ON
THE OPTIMIZATION OF CALCULATION OF THE ENERGY SPECTRA OF LINEAR SIGNALS IN
DIGITAL FIBER-OPTICS COMMUNICATION NETWORKS
Mestiashvili
K.V., Chkhaidze M.T., Svanidze R.G. and Birman F.M.
International
School of Economics at Iv. Javakhishvili
Tbilisi State University
An improved method of inverse matrices for calculation of the energy
spectra of linear block signals class mBnB is suggested. The calculation of the
characteristic polynomial for matrix M mnxmn in size is reduced to the
calculation of the characteristic polynomial for matrix V m in size. The
suggested method is particularly efficient at the m and n enhancement.
Keywords: optimization,
linear signals, energy spectrum, fiber-optics communication
networks,characteristic polynomial.
THE STUDY ON THE EFFECT OF THE ERRORS OF MEASURING DEVICES ON THE
PROPERTY 0F G-OPTIMALITY
OF SOME THIRD-ORDER POTATABLE DESIGNS FOR THREE VARIABLES
Gvaramia E.G. and Beraia N.O.
Georgian Technical University
The article deals with the effect of various
errors of measuring devices on the orthogonality of two compositional thrird-order
rotatable designs for three variables, obtained by combining D3D4
and D3D6 second-order rotatable designs. The study
was performed for the most characteristic errors of measuring devices at
different dimensions of the square. The simulation of the effect of measuring
device errors on the given properties of the designs under study was performed
by superimposing the random numbers distributed by the normal law on the design
coordinates. As a result, the researcher can select the accuracy of measuring
devices used for determination of factor levels depending on the desired
accuracy of the estimate of regression equation coefficients.
Keywords:
experiment design, rotatable designs, orthogonality, G-optimality.
THE
STUDY ON THE EFFECT OF ERRORS ON THE PROPERTY OF A-OPTIMALITY OF FIVE-COMPONENT
SIMPLEX DESIGNS
Bochoridze
E.V. and Beraia N.O.
The article deals with the
effect of various errors of measuring devices on the property of A-optimality
of five-component simplex-grid Sheffe designs of the first, second and third
orders. The study was performed for different ranges of errors most
characteristic of measuring devices. For the criterion of interest, minimum and
maximum values as well as mean arithmetic and standard deviations
characterizing the spread were obtained. Based on the study performed, conclusions
can be reached about the degree of deterioration of the property of
A-optimality of five-component simplex-grid designs of the first, second and
third orders in the presence of the
errors of measuring devices.
Keywords: experiment design, simplex-grid designs,
A-optimality.
CALCULATION OF THE KURA
RIVERBED ON CURVILINEAR SITES
Abduragimov S.G.
State Oil Academy of
Azerbaijan, Baku
In
the article, by concrete examples, an attempt of calculation of the geometrical
elements of live sections of the stream and the universal parameters of the
form of the cross-section profile of the Kura riverbed on curvilinear sites of
the river is made. Owing to the cross circulation of the stream on the
curvature of the river, sorting of the detritus in the cross-section of the
stream course occurs. Therefore, on the concave bank of the river we find large
fractions, whereas on the convex bank we find smaller fractions.
Keywords:
riverbed, cross-section profile, geometrical elements, universal parameters.
MODELING OF THE REMOTE SYSTEM FOR COLLECTION AND TRANSFER OF RIVER
HYDROLOGICAL DATA: A PARTICULAR CASE
Ahmedov A.A. and
Aliyev V.A.
National Aerospace
Agency, Azerbaijan
Institute of
Physics, National Academy of Sciences, Azerbaijan
The paper deals with the modeling of a remote system for
data collection and transfer from hydrological posts on the Kura River and its
tributaries – the Alazani and the Iori, as well as from the floating station on
the Mingechevir Water Reservoir. The offered model includes the wireless network of digital water level
recorders-sensors, operating autonomously, powered by solar cells and
communicated through satellite GSM with the Flood Management Center. In
addition, there are appropriate
software/algorithmic data processing facilities at the Flood Management Center.
Keywords: remote system, data collection, the Kura River, floods,
risk assessment, wireless sensor network.
DETERMINATION
OF THE PERCENTAGE CONTENT OF ARSENIC IN THE WASTES PRODUCTION OF ARSENOPYRITE
ORES FROM SVANETI
Chachava
G.N., Gverdtsiteli M.I., Rusia M.Sh., Goderdzishvili L.I. and Chachava G.G.
Iv.
Javakhishvili Tbilisi State University
The percentage content of arsenic in the
wastes of production of arsenopyrite
ores from Svaneti (Lentekhi Region, the village of Dzugareshi) was studied. It
was established that this content varied from 4.92 to 8.83%. The content of
gold was high (about 9 g per ton). Thus, these ores could be used for isolation
of gold if we used our method (the interaction of saturated monohydrous alcohols
of white arsenic) for minimizing the content of arsenic in these wastes.
Keywords:
arsenic, percentage, arsenopyrite ore, wastes.
COATINGS
DEPOSITED BY HIGH-ENTHALPY LAMINAR PLASMA FLOW
Khutsishvili
M.G., Kiknadze L.V. and Khutsishvili G.M.
Georgian
Technical University
The article deals with relative wear
resistance, which increases almost twice as much when the powder material is
sprayed by laminar plasma flows as compared with Cr powder. The metallographic
investigation showed that the particles of the material deposited on the item
surface were in a melted state.
Keywords:
plasma, coating, laminar flow, powder.
DETERMINATION
OF THE CONTENT OF ARSENIC IN THE AURIPIGMENT ORE OF RACHA AND THE POSSIBILITIES
FOR PRODUCTION OF USEFUL PRODUCTS FROM IT
Chachava
G.N., Gverdtsiteli M.I., Kipiani M.A. and Chachava G.G.
Iv.
Javakhishvili Tbilisi State University
The percentage content of arsenic in the
samples of auripigment ore from Racha (the village of Jvari) was studied. The analysis showed that in tombs
where the arsenic ores were placed (9 samples from 3 tombs) the percentage
content of arsenic was high and varied from 8.3 to 11.7%. We are going to investigate this
ore more thoroughly with the aim of obtaining the useful products from it.
Keywords:
arsenic, auripigment ore, arsenic percentage.
THE
EFFECT OF Gd ON THE STATE OF SPIN GLASS IN 
COMPOUNDS
Gamishidze
Z.M.
Shota
Rustaveli State University, Batumi
Abstract. The paper deals with the ground state of system 
. It is demonstrated that magnetic ordering is not
characteristic of the magnetic properties of the mentioned system, in spite of
the fact that the temperature dependence curves of the susceptibility of this
system showed magnetic ordering peaks. The analysis revealed that, at low
temperatures and low concentrations of the rare-earth element, the magnetic
state of spin glass occurs.
Keywords:
rare-earth element, magnetic properties, spin glass, ground state,
susceptibility.
TOPOLOGIC
INDICES
Tsivtsivadze
T.I., Skhiladze R.A., Tsetsadze N.R. and Gverdtsiteli M.I.
Georgian
Technical University
Iv.Javakhishvili
Tbilisi State University
The essence of topoglic indecies is
considered. The structure of the first topologic index – Winer’s index is
discussed. Four topologic indices (obtained by Georgian scientists) are
described.
Keywords:
topogic indices.
Mathematical-chemical Investigation of the sulphates
of subgroup a OF THE II
group metals
Giorgadze
K.P. and Gverdtsiteli M.I.
Iv.
Javakhishvili Tbilisi State University
The
sulphates of subgroup A of the II group metals were studied within the scope of
the 
-matrices method. Two correlation equations were derived and
investigated. The calculations showed that the correlations were good.
Keywords:
sulphates , II group metals, -matrix, correlation equation.
SYNTHESIS
OF SOME 1,2-trans-GLYCOSIDES
CONTAINING 4-METHYLTHIAZOLYLES
Sidamonidze
N.N., Gakhokidze R.A. and Koiava N.A.
Iv.
Javakhishvili Tbilisi State University
Tbilisi
State Medical University
Condensation of 1-chloro-2,3,4,6-tetra-O-acetyl-α-D-glucopyranose
and 1-chloro-2,3,4,6-tetra-O-acetyl-α-D-galactopyranose
with 4-methylthiazolyle derivatives in presence of freshly prepared Ag2CO3
catalyst was studied. New 1,2-trans-glycosides containing 4-methylthiazolyles were prepared. Their structure was determined by physico-chemical
methods of analysis.
Keywords: condensation rections, 4-methylthiazolyle
derivatives, 1,2-trans-glycosides.
USE OF ADVANCED PHOSPATE FUNGICIDES
AGAINST FUNGAL DISEASES IN VITICULTURE
Endeladze N.I., Jabishvili N.A., Karalashvili I.A., Klarjeishvili N.A., Urotadze
S.L. and Javashvili I.I.
P. Melikishvili Institute of Physical
and Organic Chemistry
at Iv. Javakhishvili Tbilisi State University
Abstract. The article reports the production of an environment friendly,
non-toxic, preparation with fungicidal properties “phosphate composite”. The
preparation is intended for application against fungal diseases of the vine.
Keywords:
fungicide, fungal diseases, vine, phosphate composite.
NEW ASSORTMENT OF SWEETS ON THE
BASIS OF THE FIL BERT NUT
Silagadze M.A., Berulava I.O.,
Khetsuriani G.S. and Iobidze A.V.
Akaki Tsereteli State University,
Kutaisi
The chemical composition of the filbert nut of the
varieties growing in Western Georgia was studied. Based on the investigation
results, the recipe and the production process scheme of sweets (candy) of new
assortment called Gantiadi were developed.
Keywords: sweets,
filbert nut, chemical composition
NEW ASSORTMENT OF SWEETS ON THE
BASIS OF THE FIL BERT NUT
Silagadze M.A., Berulava I.O.,
Khetsuriani G.S. and Iobidze A.V.
Akaki Tsereteli State University,
Kutaisi
The chemical composition of the filbert nut of the
varieties growing in Western Georgia was studied. Based on the investigation
results, the recipe and the production process scheme of sweets (candy) of new
assortment called Gantiadi were developed.
Keywords: sweets,
filbert nut, chemical composition
CLASSIFICATION OF DIABETICS’ FEET
Grdzelidze M.G. and Shalamberidze M.M.
Akaki Tsereteli State University, Kutaisi
The article deals with the issues of designing of
special footwear of rational shapes and sizes for diabetics and classification
of diabetics’ feet with the aim of production of optical size-stoutness
assortment.
Keywords: diabetic,
foot, classification of diabetics’ feet, special footwear.
RESULTS
OF THE ANTHROPOLOGIC STUDY ON THE FEET OF GEORGIANS SUFFERING FROM DIABETES
Grdzelidze
M.G. and Shalamberidze M.M.
Akaki
Tsereteli State University, Kutaisi
The article presents statistical,
correlation and regressive analyses of the results of anthropometric
diagnostics of the feet of Georgians suffering from diabetes. These analyses
provide the basis for optimization of basic size parameters of special footwear
for diabetics and hence of the corresponding lasts.
Keywords:
diabetic, foot, special footwear, anthropometric
study.
TINDER
FUNGI CAUSING DISEASES OF FOREST SPECIES AND THE STRUGGLE AGAINST THEM
Kanchaveli
Sh.S. and Keshelava R.F.
L.
Kanchaveli Institute of Plant Protection
Tinder fungi, among which there are
phytopatogenic species that arise rotting diseases of wood species, are widely
spread in Georgia. The measures of struggle against fungi causing rotting are
limited to the proper management of forestry, its protection against such
disasters as forest fires and to the prevention of the spread of infections.
Keywords:
tinder fungi, forest species, rotting, protection measures.
FUNGAL DISEASES OF FOREST SPECIES SEEDLINGS IN NURSERY FORESTS AND THE MEASURES OF STRUGGLE AGAINST THEM
Kanchaveli Sh.S. and Keshelava R.F.
L. Kanchaveli Institute of Plant Protection
The following
types of fungal diseases of seedlings are of frequent occurrence: yellowness of
needles and leaves, spotted leaves, lodging of seedlings, and rotting of
seedlings and withering of buds which are caused by Lophodermium, Ascochita, Fusarium, Pythium, Botritis, Rhizoctonia and
Alternaria. Some measures could be recommended for the struggle against the
fungi causing diseases of seedlings: agrotechnical, preventive and destructive.
Keywords: fungal diseases, forest species, seedling,
protection measures.