IVERI PRANGISHVILI AND THE CRISIS IN MODERN PHYSICS

Gerasimov A.B., Vepkhvadze M.T. and Gorgadze K.M.

Georgian Technical University

Iveri Prangishvili’s prediction about the necessity in “new physics” and the paradigm about the structure of the world for the further progress of science is justified. Based even on the available for the author materials about I. Prangishvili’s diverse research activities up to metaphysics, it is shown that Academician Iveri Prangishvili was a great thinker of our time.

Keywords: intuition, crisis, science, paradigm, physics.

ON THE PROBLEM OF SYNTHESIS OF LC-CIRCUITS WITH PREDEFINED RESONANCE FREQUENCIES

Prangishvili A.I., Milnikov A.A. and Rodonaia I.D.

Georgian Technical University

LEPL Rafiel Dvali Institute of Machine Mechanics, Georgian Technical University

Abstract. Based on theearlier developed modified intermediate problem method a relationship between the eigenvalues (proper frequencies) of impedances of separate branches of the circuit and loop impedances is established. A simple technique of separating the roots of characteristic polynomials was elaborated. A conception of conservativeness of eigenvalues is introduced: an eigenvalue of the zeroth order is called i-conservative if it is preserved when the i constraints are imposed and vanishes when the i + 1 constraints are imposed, and an eigenvalue is called conservative if it is preserved when the n-k constraints are imposed, i.e. it is the eigenvalue of both a pure loop circuit and a finite k-loopcircuit.The finite steps recurrent process of intermediate problems methodology was determined. The latter leads to new results concerning the multiplicity of LC-circuit eigenvalues, and to a new approach to the synthesis of circuits with a given range of eigenfrequenciesby means of simply choosing the required number of elements (impedances) of the same kind in primitive circuits.

Keywords: eigenvalues, electrical circuit, pure-loop circuit, pure-node circuit, orthogonal circuits, intermediate problems, roots multiplicity, eigenvalues conservativeness.

ON SIMILAR PROBLEMS FOR A NON-NEWTONIAN CONDUCTING FLUID WITH CONSIDERATION FOR HEAT TRANSFER

Kekenadze M.G. and Tsitskishvili Z.A.

Georgian Technical University

The paper deals with the movement of a nonconducting plate in the power-law non-Newtonian fluid in the absence of an electrical field. Similar solutions for the given problem with consideration for the heat transfer and blowing in the plate were found.

Keywords: non-Newtonian fluid, moving plate, power law, heat transfer.

QUANTITATIVE EVALUATION MODELS OF THE STRUCTURAL RELIABILITY OF COMPLEX SYSTEMS

Tsiramua S.G. and Sulkhanishvili S.V.

The University of Georgia

Abstract. The work deals with logical-probabilitymethods of quantitative evaluation of the structural reliability of complex information-communicational systems. As an example, there is considered a structural scheme of a computer network, and its performance features are described with a disjunctive normal form of a logical function. Using the orthogonalization method, the disjunctive normal form is brought to the orthogonal disjunctive normal form. This orthogonal disjunctive normal form allows us to replace logical elements of the system with the probabilities of non-vulnerable performance of the elements, and logical operations with mathematical operations. As a result, we have the polynomial of quantitative evaluation of structural reliability for the given computer network. By entering the variable values of the probabilities of non-vulnerable performance of the elements in the polynomial, we analyze the structure of the system. The methods described in the work give us an opportunity to select the system with a rational structure and high reliability from different configurations of the system, which is highly important while designing the complex structures of the system with multiple elements.

Keywords: complex system, structural reliability, quantitative evaluation, disjunctive normal form, orthogonal disjunctive normal form.

MODERN INFORMATION TESHNOLOGIES IN MODELING OF MARKETING PROCESSES

Okhanashvili M.Sh. and Khartishvili M.P.

Georgian Technical University

The functions of marketing in industry, the urgency of implementation of new informational technologies in this field and the effectiveness of simulation are discussed. The stages of marketing process modeling and software applications based on UML technology are considered. The problems of management of contract drawing, product production planning and accounting are underlined. A model of the Marketing system and the simulation model algorithm were elaborated. Nowadays modern information technologies and the integrated information systems, created on their basis, become the irreplaceable tool in providing the achievement of the strategic purposes and steady development of companies and organizations.

Keywords: marketing processes, information technologies, simulation.

COMPETITIVE MECHANISMS OF DISTRIBUTION OF FUNDS

Javakhadze G.S., Gorgidze D.A., Burjanadze V.O., Khartishvili M.P. and Lominadze T.N.

Georgian Technical University

The paper deals with a game model for an organizational system by an example of competitive distribution of funds. The competition in the distribution of the centralized fund improves the efficiency and allows getting the closest-to-accurate information.

Keywords: enterprise, target function, competition, distribution of funds.

FINANCIAL ANALYSIS AT A COMMERCIAL BANK

Dvalishvili M.T. and Dvalishvili M.(Mikheil)T.

Georgian Technical University

The paper deals with the financial analysis at a commercial bank. Its role and importance is discussed.

Keywords: financial analysis, commercial bank, management.

APOSSIBILITYOFCONSTRUCTINGANEWSYMMETRICTWEAKABLEBLOCKCIPHERANDAMETHODOF CALCULATION OF PEARSON’S CORRELATION COEFFICIENT

Julakidze L.E., Kochladze Z.I. and Kaishauri T.V.

Georgian Technical University

The paper deals with a new symmetric tweakable block cipher using the modified Hill algorithm. A possibility of constructing such a cipher and a method of calculation of the Pearson’s correlation coefficient between the text and the ciphertext are discussed.

Keywords: tweakable block cipher, Hill algorithm, correlation coefficient.

TYPES OF SCANNING OF THREE-DIMENSIONAL OBJECTS

Makasarashvili I.P. and Darjania M.B.

Georgian Technical University

The paper deals with commonly used methods of obtaining the digital models based on laser scanning. The issues of aerial scanning and amplitude imaging are discussed. Amplitude cameras suggest a simple method of taking the imagesof the real worldin the form of depth maps. They take images more rapidly than laser scanners and hence they can take images of moving objects as well.

Keywords: three-dimensional objects, scanning, digital models, images

CYBERNETIC MODEL OF PRICING

Kadagishvili L.G.

V.V. Chavchanidze Institute of Cybernetics, Georgian Technical University

Georgian Engineering Academy

Abstract.In the paper, the process of pricing is considered by using a cybernetic model at the level of statistics (with experimental observations). In this case, the main thing is the problem of seeking the information, moreover the initial information, when the most important is to identify the reasons by the time of the study. A classical moment and deviations from the balance are considered. The pricing process when the demand is met, on the one hand, and when the demand is not met, on the other hand, is studied. In fact, the parameters are sought.

Keywords: pricing, cybernetic model, supply, consumer, optimal price.

CLASSICAL APPROACH TO THE INVESTIGATION OF THE STABILITY OF REGIONAL NATURAL-INDUSTRIAL SYSTEMS

Prihod’ko S.Y. and Kakhiani M.R.

Donetsk National Technical University, Ukraine

Georgian Technical University

The paper deals with the concept of development of the theory of stability of regional natural-industrial systems. The concept is based on the systems approach to the consideration of the issue and the use of modern technologies for creating a regional database.

Keywords: regional natural-industrial systems, massif, mathematical model, energy of the system.

EXPERIMENTAL STUDY ON THE NONSTATIONARY PROCESS BY AN EXAMPLE OF THE WATER SUPPLY SYSTEM IN KUTAISI

Namgaladze D.P. and Mandaria G.G.

Georgian Technical University

The paper deals with the determination of the hydraulic resistance coefficient in the nonstationary process of the pipeline by the member function. The design of differencial pressure of the nonstationary process is considered according to the member function in time and lengthwise. In the process of developing the design algorithm for a short term and short length, it is possible to define the assessment of a quasi-stationary hydraulic factor. For the experimental results, simple iteration was obtained, and the process gradually attenuated.

Keywords: water supply system, nonstationary process, hydraulic coefficient.

METHOD OF DETERMINATION OF THE DYNAMICS OF THE GAS DISTRIBUTION NETWORK FAILURE RISK IN TIME BY AN EXAMPLE OF KAZTRANSGAZ-TBILISI, LTD

Namgaladze D.P. and Sanikidze G.M.

Georgian Technical University

The management of the exploitation of the gas distribution network is defined by reliability and durability, while an important index of the network is the risk of failure. The paper discusses the failure of the dynamic system and the restoration time in the coordinate phase space. As a result there was obtained the density of the probability distribution mixture of the gas distribution network element based on which it is possible to define any parameter of the process and to manage the process of reliability.

Keywords: gas distribution network, failure, probability distribution, reliability.

THE ANALYSIS OF THE INTERNATIONAL PRACTICE FOR THE SOLUTION OF ELECTRIC POWER QUALITY PROBLEMS IN ELECTRIC SUPPLY SYSTEMS

Mtvarelishvili G.M.

Georgian Technical University

The analysis of the international practice for the solution of electric power quality problems in electric supple systems shows that electric power quality problems in the EU are solved by the EU legislative measures. In European electric supply systems the owner of the electricity network has right to determine the permissible limits of power harmonics emission for each powerful electric customer based on Distribution Network Code. The customer is obliged to take the organizational - technical measures for the limitation of power harmonics emission.

Keywords: electric supply system, distribution network, power harmonics.

THE POSSIBILITY OF WORK OF UNREINFORCED MASONRY ON ECCENTRIC COMPRESSION

Bakanidze Sh.T. and Zambakhidze L.I.

Georgian Technical University

A possibility of work of the unreinforced walls of masonry buildings on the load of crossbar constructions of the ceiling is considered. It was established that, at small load and span, it is possible to use unreinforced masonry by choosing the appropriate geometric design of the ceiling.

Keywords: unreinforced masonry, eccentric compression, crossbar load, ceiling, geometric design.

DYNAMIC COMFORTABILITY OF THE BUILDING UNDER THE WIND EFFECT

Urushadze I.V.

Georgian Technical University

The paper deals with the dynamic comfortability of the building under the wind effect. It was established that it is essential to perform modeling of wind load for the building of any type in order to check it for the II limit state. It is recommended to take into consideration the requirements of ISO 10137 and SNIP (Building Regulations) 2.01.07-85.

Keywords: buildings, wind load, dynamic effect, dynamic comfortability, aerodynamically complex shape.

TEST STUDY OF THE HEATING PROCESS DURING ELECTRIC-CONTACT WELDING OF INTERSECTING ROUND RODS

Ospanova S.M., Khvadagiani A.I. and Shalamberidze M.Sh.

Akaki Tsereteli State University, Kutaisi

The heating rate in the welded contact zone during electric-contact welding of intersecting round rods is identical under both hard and soft welding conditions. During the welding of rods of different diameters, the heating temperature of rod with a larger diameter is lower than the limit heating temperature of the rod with a smaller diameter.

Keywords: electric-contact welding, intersecting round rods, heating rate.

THE EFFECT OF MAIN PARAMETERS ON THE TEMPERATURE DURING RESISTANCE WELDING OF THE PARTS OF DIFFERENT THICKNESS

Kakhishvili G.S., Neverov A.P., Metreveli A.B. and Sulamanidze A.K.

Georgian Technical University

The effect of the basic parameters of contact welding of parts having different thickness on the spot displacement is discussed. It was revealed that there was no opportunity to obtain a desirable result by varying them.

Keywords: spot welding, half-working electrode, heating, welding spot.

DETERMINATION OF THE TEMPERATURE OF MAGNETIC PHASE TRANSITIONS OF SYSTEMS Y_1-tGdt(Co_1-xAl_x)₂

Gamishidze Z.М.

Shota Rustaveli State University, Batumi

Abstract.The paper deals with the effect of the f - d exchange interaction on the ground state of zonal magnetics Y(Co_1-xAl_x)₂ and Lu(Co_1-xAl_x)₂ and the determination of the temperature of their magnetic phase transitions. The investigation showed that, at low temperature, the magnetic properties of the systems under study depended on the content of aluminum. Specifically, it was determined that the temperature of magnetic phase transitions increased with the increasing content of gadolinium. At the same time, the higher was the content of aluminum, the faster increased the temperature. At high concentrations of aluminum (x=0.07, 0.085 and 0.105), transitions from a weak ferrimagnetic state to a paramagnetic one took place at low concentrations of gadolinium t, while, at high concentrations of gadolinium t, there occurred transitions from a strong ferrimagnetic state to a paramagnetic one. At low concentrations of aluminum (x=0.00 and x=0.05), transitions to the spin glass state took placeas the temperature decreased, while, with the increasing concentration of gadolinium, transitions to the strong ferrimagnetic state occurred.

Keywords: magnetics, phase transition, temperature, paramagnetic state, ferrimagnetic state, spin glass.

BEIDELLITE OF THE OKRIBA BENTONITE CLAY

Makharadze A.I.

Akaki Tsereteli State University, Kutaisi

The beidellite clay associated with the Okriba formation of sheet slates is the product of subaerial weathering of andesite tuffs.In its basic parameters, this beidelliteis similar to the reference one from the Black Jack Mine, Idaho,USA.

Keywords: beidellite, kaolinite, montmorillonite, structure, tuffs, clay.

ECOLOGICAL PROBLEMS OF THE BLACK SEA BY THE EXAMPLE OF THE TERRITORIAL WATERS OF GEORGIA

Diakonidze R.V., Shengelia E.G., Gavardashvili G.V., Chakhaia G.G., Tsulukidze L.N., Supatashvili T.L. and Varazashvili Z.N.

Tsotne Mirtskhulava Water Management Institute of Georgian Technical University

Abstract. The paper deals with the evaluation of the ecological state of the Black Sea, which is recognized as an international problem, within the boundaries of the territorial waters of Georgia. At the first stage of the research, the background pollution of the Black Sea was evaluated. The depth distribution of hydrogen sulfide was determined at 3 miles from the coast.

Keywords: the Black Sea, hydrogen sulfide, ecological disaster, water quality.

PRODUCTION OF SPHERICAL LENSES FROM ORGANIC MATERIALS FOR OPTICAL INSTRUMENTATION

Dolidze S.V., Zardiashvili D.G., Avaliani I.M. and Kordzakhia I.I.

LEPL Institute “Optica”

The paper deals with designing and production of polymer optical components for optical instrumentation at LEPL Institute “Optica”.

Keywords: optics, lenses, polymer materials, polishing.

ON THE KINETICS OF A BIMOLECULAR CHEMICAL REACTION

Dochviri B.M., Sokhadze G.A., Tkemaladze G.Sh. and Makhashvili K.A.

Iv. Javakhishvili Tbilisi State University

Georgian Technical University

For one class of chemical reactions, the problems of kinetics of a bimolecular reaction are reduced to the problems of unimolecular reaction kinetics. Explicit analytical expressions were derived for product trajectories and the reaction rate, as well as for mathematical expectations and dispersions of these values.

Keywords: reagent, product, reaction rate, kinetics, model.

ELABORATION OF THE TECHNOLOGY OF QUARRY WATER TREATMENT BY

APILOT PLANT

Chkhubianishvili N.G., Kavtaradze M.L., Mchedlishvili G.S. and Kristesashvili L.V.

Georgian Technical University

The paper deals with the elaboration of the technology of quarry water treatment by a pilot plant. The technological parameters of electrodialysis are determined.

Keywords: water treatment, pilot plant, electrodialysis, technological parameters.

SUMMARY

TEST DATA ON THE PROCESS OF SEPARATION OF VARIOUS SALT SOLUTIONS HAVING THE SAME CONCENTRATION BY ELECTRODIALYSIS

Rukhadze Sh.Sh., Aptsiauri A.Z., Apridonidze M.D. and Shotadze A.G.

Akaki Tsereteli State University, Kutaisi

The paper dwells on the results of experimental studies of the electrodialysis processes under conditions of simultaneous action of gravitational and forced convection in a desalination chamber of the water purification electro-membrane system. The experiments were carried out with CaCl₂, MgSO₄and Na₂SO₄ aqueous solutions for a wide range of parameters such as an initial concentration, electric current density and a jump in the electrical potential in the separation channel. Also, the seawater desalination and tap water purification processes were studied. Based on the test data obtained, we can conclude that, after desalination by electrodialysis, the seawater can be used for both industrial (technical) and domestic purposes. If only one type of salt is dissolved in the water, the electrodialysis process proceeds more slowly than in the cases with different salts.

Keywords: electrodialysis, ion-exchange membranes, gravitational convection, forced convection.

SUMMARY

THE RESULTS OF EXPERIMENTAL STUDIES ON ELECTRODIALYSIS PROCESSES

Rukhadze Sh.Sh., Aptsiauri A.Z., Apridonidze M.D. and Shotadze A.G.

Akaki Tsereteli State University, Kutaisi

The paper dwells on the results of experimental studies on the electrodialysis processes under conditions of simultaneous action of gravitational and forced convection in a desalination chamber of the water purification electromembrane system. The experiments were carried out with NaCl aqueous solutions of various concentrations for a wide range of parameters such as an initial concentration, electric current density and a jump in the electrical potential in the separation channel. It was been established that the membrane was highly effective at NaCl concentration from 10 g/l to 1 g/l.

Keywords: electrodialysis, ion-exchange membranes, gravitational convection, forced convection.

STATIONARY CATALYZER FOR COTTON OIL HYDROGENATION

Siradze M.G., Neparidze N.S., Goksadze I.B., Chkhaidze E.T. and Diogidze O.Sh.

Georgian Technical University

Batumi State Maritime Academy

The research performed in the work and the selection of the catalyzer showed that the hydrogenate obtained in the result of cotton oil hydrogenation satisfied the demands for dietary fats and oils.

Thus, by varying the copper:tin ratio in the nickel-copper-aluminum stationary catalyzer, we can provide high speed and selectivity of the process of cotton oil hydrogenation.

Keywords: stationary catalyzer, cotton oil hydrogenetation, nickel-copper-aluminium alloy.

PROSPECTIVITY OF ENRICHED WITH PHENOLIC COMPOUNDS RED DESSERT WINES PRODUCTION IN GEORGIA

Kekelidze I.A., Ebelashvili N.V. and Japaridze M.Sh.

Institute of Viticulture and Oenology, Agricultural University of Georgia

Abstract. The paper deals with the significance of production of the red dessert wines enriched with phenolic compounds, technological capabilities and prospects. To increase the levels of the antioxidant components in red wines is an important issue in terms of the growing demand for antioxidant-rich food, including wines, globally. The objects of the study were prepared from Saperavi grape cultivar: 5 dessert (1 control and 4 test) and 1 dry wine samples. The control dessert wine sample was prepared by the standard technology. For preparing the test samples, for the first time we used, separately and in combination, the technological techniques of wine enrichment with phenolic compounds: fermentation on the must till dryness, removal of part of the juice from the must before alcoholic fermentation, storage on the fortified must. Phenolic compounds of the objects under study were studied by the method of High Performance Liquid Chromatography. The analysis of the obtained results showed the advantages and prospects of one of the test dessert wine samples (test III) in terms of the high content of the components having the antioxidant activity and antibacterial effect (catechins; caftaric, caffeic, syringic and ellagic acids; quercetin-3-β-D-glucoside) as compared with the other test (tests I, II, IV) and dry wine samples.

Keywords: phenolic compounds, red dessert wines, antioxidant activity.

PHENOLS AND THEIR ANTIOXIDANT ACTIVITY IN GRAPE

SEEDS OF DIFFERENT CULTIVARS

Ugrekhelidze G.D., Burdiashvili R.G., Vepkhiashvili N.G. and Javakhishvili M.L.

Jakob Gogebashvili State University, Telavi

Both the total content of phenols and their antioxidant activity are different in the grape seeds of different cultivars. The analyses showed that not all grape cultivars can be used for production of wine by Kakheti technology (for example, Pink Rkatsiteli). The investigation results suggest that the fundamental research of not only the seeds of different grape cultivars, but of all hard parts of the bunches of grapes of different cultivars will allow defining the scope of their application.

Keywords: grape seeds, antioxidant activity, phenolic compounds.

THE IMPACT OF SULFUR DIOXIDE, TITANIUM AND ASCORBIC ACID ON THE PHYSICOCHEMICAL PARAMETERS AND ORGANOLEPTIC PROPERTIES OF OXIDIZED WINE

Chkuaseli L.M., Geliashvili Z.E., Khomasuridze M.B. and Jijiashvili V.E.

Georgian Technical University

Oxidation of wine is still a rather topical problem in modern winemaking. Hence various auxiliary materials (potassium metabisulfite, tannin and ascorbic acid) for wine were used in the investigation to find solutions to the problem and its prevention. The combined use of potassium metabisulfite and tannin is efficient for prevention of wine oxidation, while the combined use of ascorbic acid and potassium metabisulfite is efficient for improving the already oxidized wine. For usefulness of the results, physicochemical analyses of test wine materials were performed, and the organoleptic properties of wine were tested by a tasting commission.

Keywords: wine, oxidation, wine materials, physicochemical parameters, organolepticproperties.

ECOLOGICAL FACTORS AFFECTING THE SPREAD OF PATHOGEN SPREAD IN THE AREA OF CROP CULTIVATION

Kanchaveli Sh.S.

Scientific Research Centre of the Georgian Ministry of Agriculture

Ecological factors (temperature, humidity, light and wind) affect the scale and spread of pathogens in the area of crop cultivation. They affect not only the formation and spread pathogens or preservation of inocula in the successive sowing period of receptive culture, but also the process of plant infection.

Keywords: plant protection, pathogens, ecology, weather conditions.

CROSS PROTECTION OF PLANTS

Kanchaveli Sh.S.

Scientific Research Centre of the Georgian Ministry of Agriculture

It is possible to protect plants against more aggressive pathogen strains by means of their preliminary infection by less aggressive or avirulent ones. It was revealed established that a weakly virulent stram Verticillium dahlia Kleb protected plum plants from a more aggressive strain of fungus. It was established that there is cross protection between different types of pathogens of the same kind. Cross protection of plants is also observed with differentkinds of pathogens. There are different mechanisms of cross protection of plants in the process of which phytoalecsins and tocsins play an important role.

Keywords: plant protection, cross protection, avirulent strains, immunity.

THE EFFECT OF MEDICAL TISSSUES IMPREGNATED WITH SOFTENERS ON THE PROPERTIES OF THE BIOCOMPOSITION MEDIUM

Pailodze N.O. and Buadze E.P.

AkakiTsereteli State University, Kutaisi

The paper deals with the effect of softeners on the properties of the biocomposition medium. As expected, the addition of softeners to the biocomposition changed the medium towards a decrease in the pH value till a weak alkaline medium. It was established that, when determining the optimal composition of the biocomposition, among main characteristics (softnesss, hygienic and consumer properties, etc.), the pH value of the medium is one of the most important parameters of the biocomposition.

Keywords: biocomposition, softeners, pH value, medical tissues.