SUMMARY

ON THE STATISTICAL ESTIMATION OF THE PROBABILITY DISTRIBUTION DENSITY: PART VI. PROJECTION ESTIMATIONS OF THE PROBABILITY DENSITY

Buadze T.G.

Georgian Technical University

Abstract. The article deals with some properties of a class of projection estimates of the probability distribution density.

Keywords: probability distribution, density, projection estimation, statistical estimate.

SUMMARY

STATISTICAL ESTIMATE OF THE OPERATING TIME IN NETWORK SCHEDULING

Buadze T.G. and Kirmelashvili G.I.

Georgian Technical University

The article deals with the statistical estimate of operating time in network scheduling. For the optimization of that time, optimistic, pessimistic and high-probability time was considered. Their statistical estimation based on the beta distribution is offered.

Keywords: network scheduling, operating time, statistical estimate, beta distribution

PERFORMANCE ANALYSIS OF IPv6 TUNNELING IN THE IPv4 ENVIRONMENT

Mirtskhulava L.G., Gugunashvili G.N., Gogoladze T.M. and Kiknadze M.G.

Iv. Javakhishvili Tbilisi State University

Georgian Technical University

Abstract. The article deals with the performance analysis of implementation of IPv6 networks in the IPv4 environment by configuring of IPv6 over the IPv4 tunnel among five routers. The backbone of the network is still based on IPv4, where it is not allowed to make any changes. In the paper the migration process to IPv6, choosing most advantageous IPv6 transition mechanisms, and interoperation of IPv4 and IPv6 networks are described. The performance analysis aspects of migration and optimization for IPv6 networks are discussed. For connectivity, IPv6 tunneling over IPV4 environment is used. All IPv4 addresses have been preconfigured. Protocol OSPFv2 has been configured in the IPV4 domain for connectivity among the routers.

Keywords: Internet Protocol Version Four(IPv4), Internet Protocol Version Six(IPv6), IPv6 tunneling over IPv4.

CHARACTERIZATION OF THE PERFORMANCE OF HYBRID WIRED/WIRELESS NETWORKS

Mirtskhulava L.G., Gugunashvili G.N., Datuashvili N.Z. and Kiknadze M.G.

Iv. Javakhishvili Tbilisi State University

Georgian Technical University

Abstract. The article deals with the specification of the architecture of hybrid wired/wireless networks based on a standard fieldbus protocol (PROFIBUS) extended with wireless subnets based on IEEE 802.11 and 802.15.4 technologies. These networks combine the advantages of both wired and wireless solutions. The advantages and disadvantages of several interconnection techniques are characterized. The basic aim of this article is to propose appropriate mechanisms and approaches supporing the real-time communication with a hybrid wired/wireless networks based on the standard fieldbus protocol (PROFIBUS)and within the given architecture.

Keywords: real-time communication, fieldbus network, wireless network, hybrid network.

SUMMARY

THE MARKET OF BIOMETRIC TECHNOLOGIES AND ITS, ANALYSIS

Chkhaidze M.N.

Georgian Technical University

The articl edeals with the issues concerning the modern solutions in the field of biometric technologies. The forecasts of the progress of the field, the state of arts and the prospects in this segment of informational technologies, and the position held by each technology or system on this market are analyzed.

Keywords: biometric technology, identification, market.

SUMMARY

SINGULAR DECOMPOSITION OF THE DATA MATRIX OF TIME SERIES WITH PERIODIC COMPONENTS AND THE RESOLVING CAPACITY OF THEIR PSEUDOSPECTRAL ESTIMATION

Buzaladze A.Z., Macharadze T.D. and Milnikov A.A.

Georgian Technical Unuversity

It is proved that m principal singular vectors of matrix , constructed on the basis of time series, containing m periodical deterministic components with additive white noise, have equal pseudospectra and their pseuvdospectral structure is identical to that of the time series. The pseudospectral structures of the rest singular vectors differ from pseudospectral structures of the principal vectors and the time series. It is shown that the latter allows us to improve the resolving capacity and the statistical stability of spectral estimations.

Keywords: time series, singular resolation, data matrix, pseudospectrum, noise.

SUMMARY

SPECIAL FEATURES OF WIRELESS SENSOR NETWORK TECHNOLOGY

Dadunashvili S.A. and Gogilidze E.R.

Georgian Technical University

The article principles of design and architecture of wireless sensor networks. The Spheres of application of such networks and the obtained results are described. The comparison of standards and protocols of wireless sensor networks is performed. The serial peripheral interface and technology of realization of communication between network units is considered.

Keywords: ZigBee, sensor network, structure, protocol.

SUMMARY

DISTANCE LEARNING METHODS, MODELS AND TECHNOLOGY

Christesiashvili N.T., Papiashvili R.Z. and Lominadze T.N.

Georgian Technical University

The article deals with the methods and technologies used in order to create the distance learning environment and e-Learning courses. The didactical, instructional design tools and techniques are emphasized. The problems of target group determination for distance learning and realization of the principle of individual learning are considered.

Keywords: distance learning, methodology, target group.

SUMMARY

METACOGNITIVE KNOWLEDGE: ITS ROLE IN LEARNING, TEACHING AND ASSESSMENT

Christesiashvili N.T. and Lominadze T.N.

Georgian Technical University

Metacognitive knowledge is a new category of knowledge in the revised taxonomy. However, given its important role in learning, it is a welcomed and much-needed addition. There are different kinds of metacognitive knowledge, but three general types are of particular importance: Strategic knowledge – knowledge of strategies for learning and thinking; Knowledge of tasks and their contexts – different types of tasks representing classrom and cultural norms and the third – Self-Knowledge.

Keywords: metacognitive knowledge, learing, teaching, assessment.

ELECTRODYNAMICS OF THE LINEAR ANTENNA WITH A CYLINDRICAL RADOME

Kokrashvili G.T. and Kevanishvili I.G.

Georgian Technical University

Abstract. The article deals with the diffraction of a flat electromagnetic wave on a coaxial dielectric cylinder, containing a linear antenna placed along its axis. This system can be considered as an antenna radome, which protects the antenna from outside factors, like snow, wind, rain, frost, etc. There were established the conditions in the multipole reflected wave spectrum when the symmetric (dipole) wave amplitude became zero, which provided the optimal mode of functioning of the radome as a receiving antenna.

Keywords: antenna, radome, dielectric layer.

SPECIFIC FEATURES OF THE SPIN-GLASS STATE OF ZONAL MAGNETS

Gamishidze Z.M.

Shota Rustaveli State University, Batumi

Abstract. The article deals with the investigation of the basic state of system Y(Co_1-xMn_x)₂ and the impact of the ƒ-d exchange field. For this system, magnetic ordering is not characterized, despite the fact that it shows the maximum susceptibility at low temperature. The analysis showed that, at low temperature, the magnetic spinglass state is characterized of this system. It is shown that, at the manganese concentration x=25%, the spin-spin correlation peaks, which is caused by the increase in the density of the state of substitution of cobalt for manganese. Because of negative Mn-Mn exchange, they failed to stabilize the magnetic ordering in this system. The spinglass state of this type, in which there are no stable magnetic moments in the paramagnetic phase, is classified among new-type “zonal” spinglass states.

Keywords: spinglass state, zonal magnet, yttrium, metamagnetic transition, exchange field

JOINING OF AN ADDITIONAL SIDE ELECTRODE TO THE ENGINE SPARK PLUG

Sulamanidze A.K., Khutsishvili M.G., Sabashvili Z.V., Chanadiri L.J., Metreveli A.B., Vatitadze G.Z.

and Bakuradze L.G.

Georgian Technical University

Joining of a basic or additional electrode to the engine spark plug is an important technical task. In this article, it is suggested to resolve this problem by resistance surface-to-surface welding. To achieve the uniform temperature distribution in the welding zone between the case and the electrode, we must have equal cross-sections of the parts to be welded. For this purpose, we should make two longitudinal cuts 2.5 mm wide in the case, which the additional electrode will be welded to. Based on the heat balance relation of welding, the equation for calculation of the values of welding current strength and density were derived. The numerical values calculated by these equations are in good agreement with those obtained experimentally.

Keywords: spark plug, side electrode, resistance welding, heat balance, current strength, current density.

SUMMARY

POSSIBILITIES FOR USING THE RESIDUAL HEAT OF LOW-CAPACITY DIESELS

Mchedlidze K.G.

Georgian Technical University

The heat resultant from fuel burning in operating cylinders does not convert into useful work completely. Significant part of this heat is lost as exhaust gases and cooling water, and because of incomplete fuel burning. The heat carried away by exhaust gases and cooling water can be used usefully. The exhaust gases can transfer heat to any heat carrier (water, vapor, air, etc.) via a cogeneration device. The possibility of designing of the cogeneration device on the base of low-capacity diesel A-41 (37.5 KW) is discussed. It is justified that this device will be capable of producing the average heat duty of 12.6 KW, which is sufficient for heating of the area of 800 m².

Keywords: residual heat, cogeneration, diesel.

SUMMARY

PECULIARITIES OF THE CHOICE OF THE TECHNOLOGY OF THE MOTOR ROAD

RUNNING REPAIR

Baratashvili M.P.

Akaki Tsereteli State University, Kutaisi

The causes of damages of asphalt-concrete roads, the character of resulting defects, how the type and degree of the damage depend on the type and intensity of the factors causing the damage and other issues are discussed. Basic methods of restoration of the asphalt-concrete pavement are analyzed, and their advantages and drawbacks are considered. The innovative technologies of restoration of the asphalt-concrete pavement are described, and the possibilities for reducing the repair time are considered.

Keywords: motor road, repair, damage, asphalt-concrete pavement.

PALEOGENE HISTORY OF SEDIMENTATION AND GEOLOGICAL DEVELOPMENT OF THE MIDDLE IRANIAN MOUNTAINS

Makharadze A.I.

Akaki Tsereteli State University, Kutaisi

The article deals with the conditions of sedimentation of paleogene sediments of the Middle Iranian Mountains and the history of their geological development.

Keywords: Paleogene, Middle Iranian Mountains, sedimentation, geological development.

ON THE DESIGNING OF THE AUTOMATD DEVICE AND SYSTEM FOR COAGULANT DOSING AND WATER TREATMENT WITH THE COAGULANT

Makhashvili K.A.

Georgian Technical University

The article deals with the issues of water treatment with the coagulant and the designing of the automated coagulant dosing device and system. The electric conductivity of coagulant solutions was studied. The functional dependence of the conductivity on the coagulant concentration was determined. The circuit diagram of inclusion of the designed device into the water treatment process was elaborated.

Keywords: coagulation, coagulant, water treatment, automated dosing.

ORGANIC MINERAL IONITES

Gurgenishvili M.B., Chitrekashvili I.A., Papava G.Sh., Papava Sh.R., Sherozia V.A., Khotenashvili N.Z.

and Tabukashvili Z.Sh.

Petre Melikishvili Institute of Physical and Organic Chemistry, Iv. Javakhishvili Tbilisi State University

On the base of modified clinoptilolite (H-form) and bromacetic acid, weak-base cationite with carboxylic ionogenic groups was synthesized. The ionites of that type can be used for treatment of waste waters and technological solutions, as well as of medicinal preparations.

Keywords: ionite, zeolite, clinoptilolite, bromacetic acid.

SUMMARY

HYBRID CATIONITES BASED ON ZEOLITES

Chitrekashvili I.A., Gurgenishvili M.B., Papava G.Sh., Sherozia V.A., Papava K.R., Khotenashvili N.Z.

and Tabukashvili Z.Sh.

Petre Melikishvili Institute of Physical and Organic Chemistry, Iv. Javakhishvili Tbilisi State University

On the base of modified clinoptilolite (H-form) and chloropropionic acid, weak-acid cationite with carboxylic ionogenic groups was synthesized. The synthesized cationite is heat resistant and mechanically rigid, and possesses high static exchange capacity. It can be used for water treatment at high temperature.

Keywords: cationite, hybrid, zeolite, clinoptilolite, chloropropionic acid.

SUMMARY

THE IMPACT OF THE STRUCTURE OF RADICALS ON THE KINETICS OF GEMINATE RECOMBINATION OF TRIPLET RADICAL PAIRS

Kokrashvili T.A., Shengelia M.A., Tsirekidze M.A., Tsulukidze M.P. and Pokleba A.K.

Georgian Technical University

The article deals with the kinetics of geminate recombination of radical pairs born in the triplet state in glycerol.

Keywords: triplet state, radical pairs, geminate recombination, intercombination transition.

RECOMBINATION OF RADICAL PAIRS IN RIGID MATRICES

Kokrashvili T.A., Shengelia M.A., Tsirekidze M.A.,Tsulukidze M.P. and Pokleba A.K.

Georgian Technical University

The article deals with the recombination of radical pairs in rigid matrices. It is shown that the recombination of triplet radical pairs of low-molecular radicals in PVC films with a quite high content of the plasticizer, which is a low-viscous fluid, proceeds in the same manner as in the liquid and is characterized by high rate constants of the second order.

Keywords: triplet state, radical pairs, intercombination transition

SUMMARY

THE INFLUENCE OF THE Cu (II) AND Zn (II) CONCENTRATION RATIO ON THE EFFICIENCY

OF THEIR CHROMATOGRAPHIC SEPARATION ON CLINOPTILOLITE

Gudushauri Ts.N.

Georgian Technical University

The article deals with the investigation of the Influence of the Cu (II) and Zn (II) concentration ratio on the efficiency of their chromatographic separation in dynamic conditions on the Clinoptilolite from Khekordzula area modified with sodium cations. The thickness of sorbent layer – 6.5 cm, the column diameter – 1.6 cm, grain size – 0.25-1 mm. The experimental data were statistically processed and absolute and relative errors were calculated for the studied model mixtures. The eluation yield curves were constructed , there of the coefficient of separation was defined, which exceed 1 at all ratios of the separated ions concentrations. This indicates complete separation and high efficiency of the developed method.

Keywords: copper, zinc, clinoptilolite, chromatography, separation.

SUMMARY

ELUCIDATION OF THE DEGREE OF PARTICIPATION OF THE PURE CULTURE OF WINE YEAST “CHKHAVERI 5” IN THE FERMENTATION OF NONSTERILE GRAPE MUST

Salia E.Sh., Melikishvili M.V., Makhatadze M.F., Mdinaradze M.B. and Chkoidze D.Z.

Institute of Horticulture, Viticulture and Oenology, Georgian Agrarian University

The article deals with the elucidation of the role of the pure culture of wine yeast in the fermentation of grape must from the standpoint of production of high-quality wine materials. The degree of participation of the pure culture of wine yeast isolated from the spontaneous flora of Chkhaveri grape cultivar, Chkhaveri 5, in the fermentation of nonsterile must was studied. The technique of controlling the fermentation of nonsterile must by using the auxotroph mutants of pure yeast culture Chkhaveri 5 allowed elucidating the degree of participation of this pure culture in the fermentation: at 2% dilution, this culture seizes the medium completely and conducts the fermentation.

Keywords: wine yeast, pure culture, grape must, fermentation.

ON THE POSSIBILITIES OF APPLICATION OF BARBERRIES AND THE BERRIES OF HAWTHORN TO PRODUCTION OF FUNCTIONAL FOODS

Tavdidishvili D.R.

Akaki Tsereteli State University, Kutaisi

The chemical composition of safety indices of barberries and the berries of hawthorn were studied. It was found out that the berries of both types contained significant amounts of cellulose, pectin and biologically active substances. The content of vitamins and mineral substances in those berries and their level of providing the daily norm of intake make barberries and the berries of hawthorn advisable for nutrition, especially for prophylaxis of ascorbic acid and iron deficiency. The technology of production of functional drinks and sauces using the barberries and the berries of hawthorn was developed.

Keywords: foods, functional product, barberries, hawthorn berries.

SUMMARY

STUDY ON CONSUMERS’ OPINIONS ABOUT BEE-MADE PRODUCTS AND THE PRODUCTS CONTAINING THEM

Tavdidishvili D.R. and Khutsidze T.Z.

Akaki Tsereteli State University, Kutaisi

Consumers’ opinions on honey and other bee-made products were studied. The monitoring results were analyzed. The advisability of production of confectionery, desserts and drinks containing honey and other bee-made products rich in essential biologically active substances is demonstrated. For this purpose, it is necessary to elaborate scientifically justified technology and recipes, which would extend the assortment of functional-purpose confectionery, desserts and drinks that today is rather limited in Georgia.

Keywords: honey, bee-made products, confectionery, dessert, drinks.

SUMMARY

NEW CANNED PRODUCT RICH IN PECTIN – PLUM CONFITURE

Shildelashvili I.I.

Jacob Gogebashvili State University, Telavi

Plum confiture was prepared from plum cultivars growing in Georgia. The confiture produced is a valuable high-calorie food product, which contains biologically active substances, organic acids, pectin and mineral substances. It is rich in polyphenols and is characterized by therapeutic and prophylactic activity. The confiture can be used as a medicinal means in the treatment of hypertension, atherosclerosis and ulcer diseases.

Keywords: plum, confiture, production process, polyphenols, pectin.

SUMMARY

NEW ASSORTMENT OF FUNCTIONAL-PURPOSE SHORT PASTRY

Pruidze E. G. and Khetsuriani G.S.

Akaki Tsereteli State University, Kutaisi

The article deals with the elaboration of the technology of production of low-calorie short pastry of a new type. It is shown that this aim can be achieved by reducing the content of readily assimilated carbohydrates and increasing the nutritive value owing to the enrichment with biologically active substances of vegetable origin. For this purpose the powdered Jerusalem artichoke was used as an additive. The elaborated technology involves the replacement of some amounts of flour and sugar with the powdered Jerusalem artichoke.

Keywords: short pastry, functionality, vegetable additive, Jerusalem artichoke.

SUMMARY

THE USE OF OIL CAKE FROM THE FRUIT OF CAUCASIAN BEECH IN CONFECTIONERY INDUSTRY

Silagadze M.A., Pkhakadze M.D. and Berulava I.O.

Akaki Tsereteli State University, Batumi

The oil cake from the fruit kernel of Caucasian beech, remained after cold pressing of oil, has not find practical application, despite being a by-product of a valuable chemical composition. In the result of research carried out, we produced a new confectionery product “Beech paste”, which can be used both as an independent product and as an ingredient in production of complex confectionery. It was revealed that the addition of the beach oil cake increased the biological value of the product and brought its amino-acid profile to recommended norms. It was established that 50g of the Beech paste provides 10% of the daily norm of intake of proteins, 185 – of fats, and 6% - of carbohydrates. The beech paste contains such amino acids as metionin+tsistin and lysine. The total content of indispensable amino acids in the beech paste made up 4.68 g per 100 g of the product, which was 32% of the total content of proteins.

Keywords: confectionery, beech fruit, oil cake, proteins, amino acids.

SUMMARY

THE DYNAMICS OF POPULATION OF FUNGUS verticillium dahlia kleb IN THE SOIL

Kanchaveli Sh.S. and Keshelava R.F.

L.Kanchaveli Research Institute of Plant Protection, Georgian Agrarian University

The population of fungi V.dahlidae in the soil is not remain constant. Am initial increase in the population is proportional to the inoculum concentration, which is connected with considerable inner stores of microscleras. The increase in the population in the soil without host plants did not rise the inoculation of soil potential, as it did not last for a long time, while worn microscleras became more sensitive to unfvorable soil conditions and less capable of infecting other plants being in contact with their roots.

Keywords: fung, population, soil, microscleras.

SUMMARY

AROMATIC OIL IN OLD GEORGIAN PERFUMERY

Bakradze–Guruli M.Sh.

Akaki Tsereteli State University, Kutaisi

Based on the study of the Georgian medicinal book Ustsoro Karabadini (X century), it is shown that there was paid much attention to cosmetic chemistry, in particular, to preparation and characterization of aromatic ethereal oil there.

Keywords: old perfumery, aromatic oil.

SUMMARY

ON CONSUMER’S PROPERTIES OF SPORTS FOOTWEAR

Grdzelidze M.G. and Shalamberidze M.M.

Akaki Tsereteli State University, Kutaisi

One of the main indices of the quality of sports footwear is the degree of comfort, which determines normal functioning of the foot and the organism as a whole. The degree of comfort of the footwear is determined by the consistency of its shape and size with those of the foot, i.e. anthropometric consistency in statics and dynamics. For designing the sports footwear, it is necessary to take into account the specific features of sportsmen’s feet, which was confirmed by the analysis of pedograms. Introduction of orthopedic insoles into sports practice minimizes impact load, which in its turn reduces the probability of microtraumas and pains in sportsmen’s feet.

Keywords: sports footwear, consumer’s properties, comfort, orthopedic insoles.

SUMMARY

PHYSICAL-HYGIENIC PROPERTIES OF SPORTS FOOTWEAR

Grdzelidze M.G. and Shalamberidze M.M.

Akaki Tsereteli State University, Kutaisi

Physical-hygienic properties of sports footwear characterize the capabilities of footwear materials and determine the hygienic characteristics of footwear. The footwear design and materials must provide the optimal microclimate in the inner space of footwear. Under high-temperature conditions, the use of materials of poor hygienic properties disturbs the comfortable state of the foot and the organism as a whole. The solution of the problem consists in the development of the properties of material packages for footwear uppers and production of the footwear of rational designs.

Keywords: sports footwear, hygienic properties, footwear materials.