SUMMARY
THE SCIENTIFIC CENTER OF
INSTRUMENT-MAKING AND AUTOMATION
(PACES OF HISTORY)
Shkabardnya M.S.
V. Trapeznikov
Institute of Control Problems of the
The paper represents a brief review of the history
of V. Trapeznikov Institute of Control Problems and
is devoted to commemoriation of Iveri
Prangishvili, the late director of the Institute.
Keywords: instrument-making, automation.
SUMMARY
THE PROBLEM OF A FEW KNAPSACKS
Burkov V.N., Burkova
I.V., Gochitashvili L.I., Kajaia
T.N., Lominadze T.N. and Khartishvili
M.P.
V. Trapeznikov
Institute of Control Problems of the
The paper deals with the generalization of
the problem of kapsacks when there are m knapsacks of limited capacity. Also,
there is a limitation on the total weight of all objects. The problems of a
similar type arise when forming the portfolio of projects with extra
limitations on the amount of financing in various directions. Another example
is the case of high-risk projects (venture projects) financing of which is
limited. A method of network programming is offered for solving the problem
stated.
Keywords: network programming, problem of
knapsacks, generalization.
ON THE STATISTICAL
ESTIMATION OF THE PROBABILITY DISTRIBUTION DENSITY:
Part I
Buadze T.G.
Abstract. The work represents a brief survey
of some basic results in the theory of nonparametric statistical estimation of
the probability distribution density, which is an important direction in the
theory of statistical estimates.
Keywords: statistical estimation,
probability distribution, nonparametric estimate, nuclear estimate, projection
estimate.
ON THE STATISTICAL
ESTIMATION OF THE PROBABILITY DISTRIBUTIONDENSITY: Part II. THE CLASS OF
NUCLEAR ESTIMATES
Buadze T.G.
Abstract. The work deals with the class of
nuclear estimates of unknown density of probability distribution. Some
properties of these estimates are discussed.
Keywords: nonparametric estimate, probability density,
probability distribution, nuclear estimate, measure, random variable.
SUMMARY
SOME
BOUNDARY PROBLEMS OF THERMODIFFUSION SOLVABLE IN SQUARES
Bezhuashvili Yu.A. and Rukhadze R.V.
Efficient solutions (in quadratures) of some boundary problems of stationary oscillations and pseudooscillations of the conjugate theory of elastothermodiffusion for infinite areas are considered.
Keywords: thermodiffusion, conjugate theory, stationary oscillations, boundary problems, efficient solutions, quadratures.
ERP-system:
Information and System Security
Shonia O.B., Kaishauri T.V. and Tsomaia N.Z.
Abstract. The structure, architecture and functions of
ERP-system are considered. The aims and objectives of the information security
of ERP-systems are defined. The methods
of system security and database (DB) information security in ERP-systems are
discussed. The threats to the database are defined and the ways of its
protection are outlined.
Keywords: information
technology, information security, information stream, ERP-system, database,
operating system authentication, authorization of the user.
SUMMARY
THE INVESTIGATION OF THE D-OPTIMAL
PROPERTY OF THE FOUR-COMPONENT
SIMPLEX-GRID DESIGN OF THE FIRST ORDER
AT CONSIDERING THE ERRORS
OF MEASURING INSTRUMENTATION
Zedginidze I.G., Beraia N.O.
and Bochoridze E.V.
The work is devoted to the investigation of
the property of D-optimality of first-order simplex-grid designs for
four-component systems with the aim of estimation of the levels of the
components of measuring instruments having certain errors. The simulation of
different errors of measuring instrumentation was performed by superimposing
random numbers distributed by the normal law on the coordinates of the
first-order design. It was established that the property of D-optimality of the
first-order simplex-grid designs for four-component systems deteriorated when
the measuring instruments with inherent errors were used.
Keywords: experiment design, simplex-grid designs, four-component systems, D-optimality.
SUMMARY
Gear
transmission with non-round internally toothed cone gears
Varsimashvili R.Sh.
and Kakhiani M.R.
The features of gear transmission with
non-round internally toothed cone gears are discussed. In order to define the
non-round cone gears, axoids are considered as fixed
and movable coordinate systems, and the radius vectors of axoids
are calculated. The matrices for calculation of the given parameters and
conditional values and the gear ratio function of the transmission with
non-round internally toothed gears are presented.
Keywords: gear transmission, non-round
cone gears, internally toothed gears, axoids, radius
vector, matrix, gear ratio.
SUMMARY
SOFT JOINING OF THE WALKING ROBOT LEGS WITH THE
SUPPORT SURFACE
Machavariani G.A.
V.Chavchanidze Institute of Cybernetics
The problem of soft joining of the hexapod robot legs with the support surface is discussed. The problem is solved by advance actuating of robot velocity regulators in relativion to the beginning of the stance travel.
Keywords: hexapod robot, robot legs, soft joining, support surface.
SUMMARY
MODERN
AIRCRAFT ICING AND THE WAYS OF ITS ELIMINATION
Jafarzade T.R.
Nowadays all aircrafts are equipped with rather reliable antiicing facitities, though the number of aviation accidents (AA) associated with icing remains quite high. AA caused by icing can be divided into two types: the AA occuring during the takeoff and the AA occurring during the approach. The present paper deals with the mathematical model of aircraft icing. It is demonstrated that the simulation of icing allows resolving a wide range of problems associated with icing, studying all modes and stages of the flight, carrying out the parametric investigation of the influence of various factors on the occurrence and development of emergency situations, working out scientifically justified recommendations on safe piloting of aircrafts under various unfavorable conditions, revealing and studying the causes of AA, etc.
Keywords: aircraft, icing, elimination of ice formation, aircraft safety.
Improvement
of Physical and Mechanical Properties of High-strength Steel through Alloying
and Thermomechanical Treatment
Tavadze G.F., Okrostsvaridze
O.Sh., Khvadagiani A.A., Tsintsadze I.Sh., Gabisiani A.G. and Mushkudiani Z.A.
F. Tavadze Institute of Metallurgy and Materials Science –
LEPL
Abstract. The work deals with the technology
of production of high-strength steel that involves smelting in the induction
furnace, treatment in the electroslag-remelting
installation, subsequent rolling and thermomechanical
treatment of the semi-finished product. The technology provides a high degree
of purity of steel in relation to sulfur, phosphorus, oxides and gases as well
as high strength and impact toughness.
Keywords: high-strength steel, induction
furnace, quenching, rolling, heat treatment.
SUMMARY
ADSORPTION OF
NITROGEN OXIDES BY AN ACID-RESISTANT SORBENT ON THE BASIS OF NATURAL MORDENITE
Pirtskhalava N.V., Zautashvili
M.G., Dzagania M.A., Rubashvili
I.M., Burkiashvili N.O.
and Kordzakhia
K.T.
P. Melikishvili Institute of Physical and Organic Chemistry
St. Andrew’s
University of the Patriarchate of
The process of adsorption purification of the
air from nitrogenous gases (N2O and NO2) by using the
hydrogen form of mordenite from the Bolnisi-Ratevani Deposit (Georgia) was studied. The
experiments were performed under dynamic conditions in the specially designed
flow-type laboratory installation. The experimental results showed that the
hydrogen form of modernite was a promising sorbent
for purification of the air from nitrogenous gases.
Keywords: mordenite,
adsorption, nitrogenous gases, air purification.
SUMMARY
INVESTIGATION OF STRUCTURE-FORMING PROCESSES
DURING HARDENING
OF ZEOLITE-CONTAINING CEMENT
Tsintskaladze G.P., Skhvitaridze R.E., Keshelava
B.F., Sharashenidze T.V. and Tatarashvili
G.Sh.
P. Melikishvili
Institute of Physical and Organic Chemistry
Kiriak Zavriev
Institute of Structural Mechanics and Seismic Stability
The paper deals
with the investigation of the effect of zeolite
admixtures processed at the nanolevel on the
properties of high-strength cement. The kinetics of structure formation during
hardening of the cement was studied by the methods of X-ray diffraction
analysis, IR spectroscopy and thermal analysis. It is shown that the zeolite admixture not only improved the properties of the
cement, but also acted as a reinforcer.
Keywords: zeolite,
admixture, cement, hardening.
SUMMARY
BASALT CONTINUOUS FIBER: A METHOD OF MANUFACTURE AND
TESTING OF MECHANICAL PROPERTIES
Begiashvili G.A., Blagidze
E.M., Gvatua N.Sh., Gvatua Sh.Sh.,
Mdivani I.G. and Tkhinvaleli
R.G.
V.Chavchanidze Institute of Cybernetics
In the given work the data on the basic parameters
of the experimental laboratory device for drawing fiber from unique basaltic
raw materials of
Keywords: basalt fiber, continuos fiber, mechanical properties, manufacture, testing.
SUMMARY
Some
physical and chemical specific features of artistic reducing-flame enamels
Sanadze S.G., Gaprindashvili
G.G. and Kekelidze M.K.
Changes in the oxygen concentration in the
depth of the enamel layer were determined. The problem of stresses of
enamel-to-metal seals in the reducing atmosphere was studied. It was
established that the stress in the seal decreased when the time of its exposure
to the reducing atmosphere increased, which could be attributed to the decrease
in the modulus of elasticity of the enamel.
Keyword: enamel, paint, reduction, reducing
flame.
SUMMARY
Photochromic
Liquid-crystal Systems for Nanotechnology
Japaridze Ę.g., Devadze L.V.,
Maisuradze J.P., Ězhavanadze I.A., Zurabishvili
Ts.I., Sepashvili N.O.
and Petriashvili G.Sh.
High-sensitive photochromic
compositions were obtained on the base of nemato-chiral
liquid crystals and synthesized spiropyrans: 6-nitro-2Í-chromen-2-2'-spiro-1,3',3'-trimethylindoline
and 6,8-dinitro-2Í-chromen-2-2'-spiro-1'-tetradecyl-3',3'- dimethylindoline. Photochromic liquid-crystal films were
obtained by integration of the composition into a polymer for application in
nanotechnology.
Keywords: spiropyrans, merocyanine
form, nemato-chiral liquid-crystal polymer film,
nanotechnology.
Graphs -“Stars” as Mathematical Models of some Molecules
and their Transformations
Gverdtsiteli M.I., Rusia M.S.
and Lobdjanidze L.N.
Iv.
Abstract. Three types of graphs: the
symmetric star, the asymmetric star and the multisymmetric
star are considered as mathematical models of some molecules and their transformations.
The theorems stipulating that the determinants of the pseudocontiguity
matrices of symmetric stars, asymmetric stars and multisymmetric
stars are equal to zero were proved.
Keywords: graphs, symmetric star,
asymmetric star, multisymmetric star, pseudocontiguity matrix.
SUMMARY
MATHEMATICAL-CHEMICAL INVESTIGATION OF Cu(I)
HALIDES
Chachava
G.N., Gverdtsiteli M.G., Laperashvili
I.A. and Gverdtsiteli M.I.
Iv.
Cu(I) halides were studied within the scope of the ANB-matrices method from the point of view of mathematical chemistry. Three correlation equations of the type „structure-properties” were derived and investigated. The calculation results showed that, according to Jappe’s criterion, the correlations were good.
Keywords: Cu(I) halides, ANB-matrix, correlation equations.
Mathematical-chemical
Investigation of Sodium Halides
Chachava G.N., Gverdtsiteli
I.M., Chachava G.G. and Gverdtsiteli
M.I.
Iv.
Abstract. Sodium halides were studied within the scope
of the ANB-matrices method. Three correlation equations of the type
„structure-properties” were
derived and investigated. The calculation results showed that, according to Jappe’s criterion
the correlations were good.
Keywords: Sodium halides, ANB-matrices
method, correlation equations.
SUMMARY
Mathematical-Chemical
Investigation of Alkylethylenes
Karchkhadze M.G. and Gverdtsiteli
M.I.
Iv.
Alkylethylenes were studied within the scope of the
quasi-ANB-matrices method. Two correlation equations of the type
“structure-properties” were derived and investigated. The calculations showed
that the correlations were good.
Keywords:
alkylethylenes, quasi-ANB-matrix, correlation
equations.
Mathematical-Chemical
Investigation of Branchless Carboxylic Acids
Gakhokidze R.A., Topuria
L.S., Kupatadze K.T. and Gverdtsiteli
M.I.
Branchless carboxylic acids where studied
within the scope of the
-matrices method. Two correction equations of the type
“structure-properties” were derived and investigated. The calculations showed
that, according Jaffe’s criterion, correlations were good.
Keywords: carboxylic acids, -matrix, correlation equations.
manufacture of marketable products from
Arsenic-containing Ores
Chachava G.N., Gverdtsiteli M.I., Laperashvili I.A., Sagaradze N.Sh. and
Lobdjanidze L.N.
Iv.
Abstract. The paper deals with the specifity
of production of iron(III) arsenate(V) dihydrate from the ore of Dzugareshi
(Georgia). The arsenic-containing ore was comminuted, sieved and treated with
the 20% solution of hydrogen peroxide (as an oxidant).
The advantage of the method is that the use of hydrogen peroxide instead of
nitric acid eliminated the factor of environmental pollution.
Keywords: iron(III) arsenate (V) dihydrate, arsenic-containing ore, hydrogen peroxide.
SUMMARY
THE
EFFECT OF THE LATENT HARDENER ON THE PHYSICAL AND CHEMICAL PROPERTIES OF
BUTADIENE-STYRENE THERMOELASTOPLASTICS
Shalamberidze M.M., Grdzelidze M.G. and Lomtadze N.Z.
The results of the investigation of the effect of latent hardener LO-2 on the physical and chemical properties of butadiene-styrene thermoelastoplastics of grades DST-30 and Sibilen are presented. It is shown that the use of latent hardener LO-2 in polymers causes the formation of an elastic space lattice and improves the plasto-elastic properties of materials.
Keywords: thermoelastoplastics, footwear materials, chemical technology.
The study
on the cytotoxicity of new biodegradable arginine-based poly(ether-ester
urethane cation)s on 4T1 cells
Memanishvili
T.N., Bedinashvili M.V., Tugushi
D.S., Torchilin V.P. and Katsarava R.D.
Centre for Medical Polymers
and Biomaterials,
Center for Pharmaceutical Biotechnology and
Nanomedicine, Northeastern University,
Abstract. The success of gene therapy
depends on safe and effective gene delivery systems. Non-viral delivery agents
have been introduced in the art for the issues of safety and limitations
associated with current viral vectors. Synthetic polycations,
like polyethylenimine (
Keywords: gene delivery, non-viral
carriers, polycations, biodegradable poly(ether-ester urethane)s, L-arginine.
Summary
The use of honey and bee products in the production functionality
Tavdidishvili D.R., Pkhakadze
M.D. and Beshkenadze T.A.
The technology was developed and the quality of ice
cream and cream, cooked with honey and bee products was investigated. The
dynamics of the organoleptic, physicochemical and
microbiological quality and safety of products developed during storage was
studied. The chemical composition, and the indices of
biological, food and energy value of new products were determined. High
consumer value of the products studied is justified.
Keywords: honey, bee products, functional foods.
SUMMARY
DETERMINATION OF FUNGICIDIC PROPERTIES OF CALCIUM HYDROPHOSPHATE AND
THE PROSPECTS OF ITS APPLICATION AGAINST Plasmopara viticola
Klarjeishvili N.A., Karalashvili I.A., Endeladze
N.I., Jabishvili N.A., Urotadze
S.L. and Javashvili I.I.
P. Melikishvili Institute of Physical and
Organic chemistry
L. Kanchaveli Institute of Plant Protection
A preparation of calcium hydrophosphate was
synthesized, and its phungicidic properties were determined. The effect of the
preparation on germinating spores including Plasmopara viticola, being causative agents of fungicide diseases was
studied. The obtained results showed that the synthesized preparation could be
used against such diseases.
Keywords: fungus diseases, plant protection, calcium hydrophosphate.
SUMMARY
Diseases of the
seeds of
Kanchaveli Sh.S. and Keshelava R.F.
L.Kanchaveli Research Institute of Plant Proteetion
Diseases of the
seeds of forest woody species manifest themselves as mould, mummification,
spots, rot, etc. They are mainly caused by fungi. These diseases reduce the
seed germination, cause
the death of seedlings in nurseries, retard the growth and often
cause premature death of adult trees. The following measures against the seed
diseases are foreseen: due seed collection, seed drying, disinfection of pakhaging and store-houses, chemical treatment of seeds
prior to winter storage, and seed storage in dry storages at 4-50C
and 65-70% humidity, periodical ventilation of storages during the seed
storage, and seed mixing by means of a spade.
Keywords: forest woody
species, diseases, fungi, mould, mummification, rot, protective measures.
Summary
Cancer
Diseases of
Kanchaveli Sh.S, and Keshelava R.F.
L.Kanchaveli Research Institute of Plant Protection
Cancer diseases of forest woody species are widely spread and are very
harmful. Inflectional and non-inflectional cancer diseases of
the forest woody species are distinguished. The non-inflectional diseases
emerge under the influence of unfavorable abiotic factors, whereas the inflectional ones are caused
by fungi and bacteria.There
are different types of cancer diseases of the forest woody species: tumor cancer, resin cancer and phase cancer. Sanitary, agrotechnical and chemical control measures are used
against the cancer diseases.
Keywords: forest woody
species, cancer diseases, protective measures.