SUMMARY

1
INFORMATION MODELING AND ANALYSIS OF A CLASS OF INCOMPLETE FINANCIAL MARKETS

Meladze G.A.

Georgian Technical University

The methods of robust statistics are used for the purpose of controlling the market risk of contigent claims. The semimartingale model of the financial market is considered, the notion of "incomplete information" is formalized, and the minimax problem of hedging with respect to the root-mean-square function of the risk is posed. Then this problem is approximated by another optimization problem, which is more convenient for an investigation. By solving the latter problem, the optimum robust hedging strategy is worked out.

Keywords: incomplete financial market, analysis, information modeling.

2
NUMERICAL ANALYSIS OF STOCHASTIC DIFFERENTIAL EQUATIONS AND A STOCHASTIC VOLATILITY MODEL

Meladze G.A.

Georgian Technical University

A method of numerical solutions to stochastic differential equations with both strong approximation and weak approximation schemes is described. The numerical analysis of a stochastic volatility model of the incomplete financial market is presented.

Keywords: stochastic differential equations, numerical analysis, stochastic volatility model.

3
STOCHASTIC VOLATILITY MODEL WITH SMALL RANDOMNESS: ROBUST FITTING OF THE MODEL

Meladze G.A.

Georgian Technical University

The stochastic volatility diffusion model with a small noise and an unknown parameter in the drift coefficient of the volatility process is considered. Statistical procedures of reconstruction of the latent volatility process (based on historical or market data) are introduced and application of the bias-robust estimate of an unknown multidimensional parameter is suggested, which allows correct fitting of the model to historical or market data.

Keywords: stochastic volalility, model, robust fitting.

4
ON A COMMUNICATION CHANNEL MODEL WITH THE EXPONENTIAL LAW OF INTERFERING FACTOR DISTRIBUTION

Khocholava V.V.

Georgian Technical University

There is considered a communication channel model when a packet is transferred by the exponential law of interfering factor time distribution. The mathematical expectation of the random time of multiple packet transfer has been determined.

Keywords: communication channel, exponential law, interfering factor distribution.

5
A QUEUEING SYSTEM WITH REDUNDANCY

Khocholava B.B and Mikadze I.S.

Georgian Technical University

A queueing system with the redundant operation unit has been studied. There were derived analytical expressions for queue lengths at Poisson's flows of requests and failures of servers.

Keywords: queueing system, reliability, redundancy.

6
STUDY OF THE SECOND-ORDER SYMMETRIC COMPOSITION DESIGNS BEING THE CLOSEST TO D-OPTIMUM ONES IN THE CASE OF ERROR OCCURRENCE

Beraia N.O.

Georgian Technical University

There have been studied the second-order symmetric composition designs that are the closest to D-optimum ones for two variables in the case of experiment error occurence. Distortion of the design configuration was carried out by adding the design points to the coordinates. The design points were distributed by the normal law of such numbers that corresponded to the 1%, 2.5% and 5% accuracies of measurement instruments.

Keywords: experiment design, symmetric composition designs, errors.

7
DIRECTION DIAGRAMS RESULTING FROM SCATTERING OF PLANE ELECTROMAGNETIC WAVES INCIDENT WITH A SLOPE TOWARDS THE AXIS OF DIELECTRIC AND METAL-DIELECTRIC CYLINDERS

Dekanosidze Sh.V., Kevanishvili G.Sh. and Zamtaradze G.G.

Georgian Technical University

There are considered direction diagrams and their specific features at scattering of plane electromagnetic waves incident with a slope towards the axis of dielectric and metal-dielectric cylinders. At the unchanged angle of incidence, the diagram shape depends strongly on the electrical radius of the dielectric cylinder. The same recurs at the unchanged electrical radius when the angle of incidence changes. A similar pattern is observed for the metal-dielectric cylinder. Though, in the latter case the diagram shape depends on the dielectric layer thickness.

Keywords: plane electromagnetic wave, sloping incidence, dielectric cylinder, metal-dielectric cylinder, scattering, direction diagram.

8
MAGNETIC PROPERTIES OF MIXED URANIUM SULPHIDES WITH THE IVa and Va GROUP ELEMENTS

Chachkhiani Z.B.

Georgian Technical University

Magnetic properties of mixed sulphides with the IVa and Va group elements of the periodic system of the AU₂S₅-, AU₃S₆- and BUS₃ -type, where A = Zr, Ti, Hf; B = V, Nb, Ta, were studied in magnetic fields ≈10⁸ A/m over the range of 4.2K - 300 K. Both crystalline structure and lattice cell parameters for all the synthesized compounds were ascertained. It was found that only combinations with titanium are antiferromagnets with Θ_N= 23 … 25 K, whereas the others are ferromagnets with high magnetocrystalline anisotropy. Ferromagnetic Curie temperature varies within the range from 63 K for ZrU₂S₅ to 220 K for VUS₃. A large thermal hysteresis of magnetization which is connected with the irreversible domain-wall displacement was identified. Magnetic behaviour near the Curie temperature is described on the basis of the thermodynamic theory of magnetic transformation.

Keywords: magnetic properties, ferromagnet, monosulphide, hysteresis.

9
OXYGEN AT THE CYLINDRICAL SURFACE OF GAS PHASE POLYCRYSTALLINE TUNGSTEN

Zykov B.M. and Nardaia Yu.I.

Sukhumi Physical-Engineering Institute

There has been studied the interaction of oxygen with the cylindrical surface of a gas phase polycrystalline tungsten coating on the Nb – 1% Zr alloy, which is used as a material for the collector of thermoemission converters (TEC) of heat energy into electric power. The methods of investigation were low-energy threshold spectroscopy and contact-potential difference in vacuum (2×10^-8 Pa minimum). Low susceptibility of the W coating on the Nb – 1% Zr alloy to the changes in its oxidation conditions and, possibly, to P_res. in whole in the interelectrode gap of the TEC over the range of 600-1300°C must contribute to the stability of output characteristics of the TEC. Besides, the TEC collector made of this material must be unsusceptible to the mass transfer from the W emitter due to the Nb diffusion to the surface and the absence of oxygen solubility in the volume lattice, i.e. the collector obtained after cleaning of the corresponding surface will be continuously self-restoring.

Keywords: gas phase polycrystalline tungsten, cylindrical surface, thermoemission converter, collector.

10
OXYGEN ON THE HEATED CYLINDRICAL SURFACE OF GAS PHASE POLYCRYSTALLINE TUNGSTEN

Zykov B.M. and Nardaia Yu.I.

Sukhumi Physical-Engineering Institute

There has been studied the interaction of oxygen with the heated cylindrical surface of a gas phase polycrystalline tungsten coating on the Ni - 1% Zr alloy, which is used as a material for the collector of thermoemission converters (TEC) of heat energy into electric power. Under the working vacuum conditions of TEC, the oxygen from residual gases of the interelectrode gap (IEG) is sufficient for formation of suboxide Nb₂W₂O at the collector even without special additional bleeding-in, which is recommended only at the stage of cleaning the surface of C. Though, stable characteristics of the TEC will not be high untill on the collector surface there is present C, the most harmful and thermally stable (up to 1100°C) component of CO. To reduce the content of C, they have to improve the process sanitary requirements or to change to the monocrystal coating, which contains significantly less volume defects where C is accumulated.

Keywords: gas phase polycrystalline tungsten, cylindrical surface, thermoemission converter, collector.

11
DETERMINATION OF PARAMETERS OF A MULTITURN SINGLE-LAYER CYLINDRICAL INDUCTOR

Nemsadze Sh.A.

Georgian Technical University

The skin effect and its forms such as proximity and ring effects do not allow using the known methods for calculation of inductance and resistance of the electric circuit element. The equivalent inductance and resistance of a multiturn single-layer cylindrical inductor have been determined by the energetical method. For this purpose, the energy of the magnetic field of the multiturn single layer inductor was defined. It is shown that, at the frequency range of 5-100kHz used in the magnetic pulse installations, the developed method of determination of the inductor parameters gives satisfactory results.

Keywords: multiturn single-layer cylindrical inductor, equivalent parameters, magnetic pulse installation.

12
DIGITAL CODING OF AN IMAGE SEQUENCE WITH THE INTERFRAME NONLINEAR PREDICTION

Kharatishvili N.G., Chkheidze I.M. and Gogilashvili Z.J.

Georgian Technical University

There was carried out the experimental investigation on the efficiency of application of interframe differential pulse coding modulation (DPCM) with a nonlinear prediction. The nonlinear prediction was performed with the help of construction of the morphological pyramid in the previous frame and fast Fourier transformation (FFT) with sorting out the coefficients by the amplitude principle. The application of the interframe DPCM in combination with the morphological pyramid construction and linear Fourier transformation significantly improves the efficiency of image sequence coding, namely it increases the compression coefficient 5 times.

Keywords: image coding, differential pulse coding modulation, nonlinear prediction, morphological pyramid compression coefficient.

13
MATHEMATICAL MODELING OF DYNAMICS OF THE VALVE CONTACT DEVICE

Tvalchrelidze A.K., Ebanoidze J.D. and Geradze P.T.

Kutaisi Technical University

A model of dynamics of the valve contact device (VCD) was developed on the basis of laws of conversion of mass, energy and momentum. Computational experiments were carried out for revealing the effect of design parameters and operating conditions on the dynamics of the VCD with the buffer volume. There are presented the diagrams of changes in the valve rising height and in the pressure in the buffer volume with time at stepwise increasing of the pressure. The comparison between the design and experimental data showed a good agreement between them. The relative error in modeling of oscillation frequency and amplitude was less than 15%.

Keywords: contact device, valve, dynamics, modeling.

14
BUBBLE FORMATION IN THE SPARGING MODE OF OPERATION

Ebanoidze J.D.

Kutaisi Technical University

In the sparging mode of operation, hydrodynamics of the valve contact device (VCD) reduces to the description of the process of formation and rise of bubbles. Here the bubble formation is considered as a dynamic process, which allows using the pressure instead of the rate (volume flow) of the gas passing through the device that itself is the quantity to be determined. Basing on the quasistatistical model of the gas bubble blowed out into a liquid medium, stable and unstable forms of equilibrium were established. The second-order differential equation describing the dynamics of the bubble growth was derived. There are presented some results of the numerical solution to the corresponding Cauchy problem that give an idea of the effect of the pressure differential on the bubble dynamics. The suggested model of bubble formation can be used in investigations of the sparging mode of operation of the contact device of mass-transfer apparatuses.

Keywords: contact device, valve, sparging mode, bubble formation.

15
MACRO- AND MICROINHOMOGENEITY DETERMINED BY THE OPEN CHLORIDE SYSTEM

Kutubidze B.V and Chikovani R.I.

Batumi Polytechnical Institute of Georgian Technical University

Georgian Technical University

It is demonstrated that the residual impurity in a vapor phase in chloride and chloride-hybrid processes is in the form of molecules, the concentration of which over the growth islands depends on the distance from the growth reactor and determines macro- and microinhomogeneity of growing layers.

Keywords: microinhomogeneity, open chloride system, layer growth, lattice atom, longitudinal acoustic oscillations.

16
THE EQUIVALENT AND SERIES OF EQUATIONS OF A DIFFERENTIAL BRIDGE RELAY

Museliani T.G.

Georgian Technical University

The equivalent and series of differential equations with consideration of the magnetic connection between magnetizing and demagnetizing loops are considered. It is demonstrated that subtraction of currents undoubtedly impairs the sensitivity and quick operation of the protection. Thus, that operation should be withdrawn from the logic circuit of the device. The circuit of the equivalent induction bridge relay was designed.

Keywords: induction bridge, differential bridge, equivalent, magnetic connection.

17
FOUR TYPES OF ELECTROMAGNETIC INDUCTION

Museliani T.G.

Georgian Technical University

It is demonstrated that the dual origin of electromagnetic inertia of mutual induction is a physical basis of transmission of the energy and coded information via an electromagnetic field. The negative inertia impedes and the positive inertia favours the changes in the electromagnetic quantity of motion, which it has been created by. The classification of types of the electromagnetic induction by the character of its electromagnetic inertia is suggested: 1. induction with negative inertia - electrodynamic induction, self-induction and mutual induction at a positive magnetic connection; 2. induction with positive inertia - mutual induction at a negative magnetic connection.

Keywords: electromagnetic induction, positive inertia, negative inertia.

18
ON A MODEL OF THE RELIABILITY OF A METAL-CUTTING MACHINE

Museridze N.D.

Georgian Technical University

There is considered the reliability of metal-cutting machines consisting of two parts: equipment and a tool. In such a design, the both parts are connected in series and hence a failure of any of them causes a failure of the whole machine. The tool failure is distributed by the Erling law, and the equipment failure - by the exponential law. The availability functions and coefficients have been determined.

Keywords: metal-cutting machine, reliability, mathematical model.

19
THE EFFECT OF SUPERFICIAL ENRICHMENT OF NONALLOYED AND LOW-ALLOYED CHROMIUM WITH HIGH-ACTIVE ELEMENTS

Mikadze O.I., Tsurtsumia O.O., Beradze D.L., Bulia B.P., and Kutelia E.R.

Georgian Technical University

F. Tavadze Institute of metallurgy and Materials Science

Comparative heat-resistance tests of nonalloyed and low-alloyed chromium samples with deposited and implanted lanthanum and the ones covered with lanthanum hexaboride have been conducted. It was established that increasing concentrations of lanthanum or its oxide in superficial matrix layers lead to a considerable improvement in heat resistance both of nonalloyed and low-alloyed chromium. Independently of the realized ways of this act, the positive effect results from the formation of lanthanum chromites distributed at grain boundaries of the growing oxide film during high temperature oxidation.

Keywords: chromium, superficial enrichment, heat resistance, oxidation kinetics, high-active elements.

20
THE STRUCTURE OF TRANS-DIAQUABIS(1,2-DIAMINOETHANE)COPPER(II) BIS(p-AMINOBENZOATE) TRIHYDRATE AND SYNTHESIS OF ITS NICKEL AND ZINC ANALOGUES

Miminoshvili E.B., Sobolev A.N., Beridze L.A and Miminoshvili K.E

Georgian Technical University

University of Western Australia

Tbilisi State Medical University

The synthesis of solid complexes M(en)₂(AB)₂·nH₂O (en=ethylenediamine, AB= p- or o-aminobenzoate, M=Cu, Ni, Zn) and the structure of trans-diaquabis(1,2-diaminoethane)copper(II) bis(p-aminobenzoate) trihydrate are considered. The crystal structure of [Cu(en)₂(OH₂)₂](p-AB)₂×3H₂O (a=15.960(3), b=9.567(2), c=16.172(3) Å, β=90.32(3) °, V = 2469.3(8) Å³, T = 153 K, P2/n, Z = 4, R(F) = 0.093) contains two cations [Cu(en)₂(OH₂)₂]²⁺, disposed on two different axes of the secend order with ethylenediamine fragments disordered between pairs almost orthogonal orientation in concert with one of the crystalline water molecules; the p-aminobenzoate anions in the crystal lie in almost square channels along the b direction and are involved in an extensive system of hydrogen bonds including both the uncoordinated and coordinated water molecules.

Keywords: complex compounds, synthesis, structure analysis, transition metals, aminobenzoates.

21
QUANTITATIVE ANALYSES OF ARSENIC AND ZINC AND OF ARSENIC AND CADMIUM AT THEIR SIMULTANEOUS PRESENCE

Lobzhanidze T.E., Gurgenishvili L.V., Rusia M.Sh and Gigauri R.D.

Iv. Javakhishvili Tbilisi State University

There has been developed a method of quantitative analysis of arsenic and zinc and of arsenic and cadmium at their simultaneous presence in compounds. It is demonstrated that the mentioned elements are titrated in identical aliquot parts with sufficient accuracy: zinc and cadmium - with Trilon B, and arsenic - by the Evans method.

Keywords: quantitative analysis, arsenic-zinc, arsenic-cadmium, simultaneous presence.

22
A METHOD FOR DETERMINATION OF MICROQUANTITIES OF PHOSPHOR

Telia N.M., Japaridze K.V., Mgaloblishvili N.O. and Toronjadze D.D.

Iv. Javakhishvili Tbilisi State University

The interaction between antipyridine, diantipyryl methane, methyldiantipyryl methane, and propyldiantipyryl methane and phosphomolybdic acid was studied. Diantipyryl methane (DAM) proved to be the best reagent. In 0.4 acetic acid solution, DAM formed a suspension with phosphomolybdic acid. The maximum density of the suspension was reached at 500-fold excess of ammonium molybdate and 40-fold excess of DAM in 15 min after mixing of the solutions. The suspension was stable for 1 hour. The linear dependence of the phosphor concentration on the optical density was observed in the range of 1-10 μg / 25 ml phosphor. A turbidimetric method for determination of microquantities of phosphor was developed. The sensitivity of the method is 0.04 μg/ml P. The method allows determining the phosphor quantity immediately in the objects containing Fe³⁺, Cu²⁺, Mn²⁺, Ni²⁺, Co²⁺, Al³⁺, Zn²⁺, Cd²⁺, Mg²⁺, Ca²⁺ etc.

Keywords: phosphor, microquantity, determination, turbidimetry, method.

23
ACETATE COMPLEXES OF COBALT(II), ZINC AND CADMIUM WITH 2-AMINO-6-METHYLPYRIDINE

Tsintsadze M.G., Chanturia M.M., Gulbani D.V., Kipiani T.I., Tsintsadze G.V. and Taktakishvili T.T.

Georgian Technical University

Coordination complexes of cobalt(II), zinc and cadmium acetates with 2-amino-6-methylpyridine (L) were synthesized in an aqueous medium. The complex compositions were as follows: Со(СН₃СОО)₂×L×2Н₂О, 2Zn(СН₃СОО)₂×L×Н₂О and Cd(СН₃СОО)₂×L×2Н₂О. The ways of coordination between L and acetate groups and central ions were studied by IR spectroscopy. In all the cases, organic ligand showed a monodentate function due to the nitrogen atom of the heterocycle. The acetate group showed a monodentate function in cobalt(II) and cadmium complexes, and a mixed (i.e. monodentate and bridge) function in 2Zn(СН₃СОО)₂×L×Н₂О. The coordination number of all the mentioned complexes was equal to 4.

Keywords: cobalt(II), coordination complexes, cadmium, acetate, 2-amino-6-methylpyridine

24
ESTIMATION OF HIGH-TEMPERATURE PROCESSES IN A MULTICOMPONENT MODEL SYSTEM

Makhviladze V.R., Sarukhanishvili A.V., Mikaberidze I.S. and Gogishvili A.R.

Georgian Technical University

Model compositions of a part of the pseudoquaternal system, containing the product of slag processing at Rustavi Metallurgical Plant are discussed from the point of the processes proceeding in them at heating. The scheme of the mentioned processes at 298-1723K has been established. It is shown that the processes begin with the formation of complex silicate and end with the formation of eutectic, composition melting and dissolution of refractory components in the melt. The results are supposed to be used in studying the high-temperature processes in the Sl-Na₂CO₃-CaCO₃-SiO₂ system.

Keywords: silicate system, model, high-temperature processes, estimation.

25
PHARMACOKINETICS OF CARBAMAZEPINE IN THE CASE OF A SMALL ORAL DOSE OF THE MEDICINE

Bezarashvili G.S., Rukhadze M.D., Alexishvili M.M. and Dzotsenidze Z.G.

Iv. Javakhishvili Tbilisi State University

The changes with time in the carbamazepine concentration in rabbit plasma after oral delivery of the medicine were studied by liquid chromatography. On the pharmacokinetic curve, only one peak was registered. On the basis of a simple one-compartment model, constants of the carbamazepine absorption and elimination rates, which were equal to 0.92 hours^-1 and 0.40 hours^-1, respectively, were determined.

Keywords: carbamazepine, pharmacokinetics, one-compartment model, liquid chromatography.

26
KINETICS OF FORMATION OF TRIBUTYL ARSENITE AT THE EXCESS OF BUTANOL

Bezarashvili G.S., Niniashvili N.T., Gigauri R.D., Sigua K.I. and Dzotsenidze Z.G.

Iv. Javakhisvili Tbilisi State University

The reaction between arsenious anhydride and butyl alcohol under nonisothermal conditions was studied. The process was being observed using a volumetric method via distillation of the by-product (water). The reaction rate values were determined by the method of graphical differentiation of kinetic curves. The experimental results were processed by the Monte-Carlo method. There was derived a specific kinetic equation describing the dependence of the degree of the solid phase conversion on time under the given experiment conditions. The adequacy of the equation in relation to the experimental data was tested by the Euler method.

Keywords: kinetics, arsenious anhydride, tributyl arsenite, nonisothermal conditions, Monte-Carlo method.

27
THE EFFECT OF AZAINDOLE ON PHOTOCHROMATIC PROPERTIES OF SPIROCHROMENES

Japaridze K.G., Pavlenishvili I.J., Gugava M.T., Maisuradze J.P. and Akhobadze Sh.A.

Institute of Cybernetics

It is demonstrated that introduction of the nitrogen atom into a benzene ring of the indoline cycle causes a shift in the colored – uncolored equilibrium to the uncolored form of spirochromene. It has been established that at photochromic coloring of azoindoline spirochromenes, the order of the C–N bond of the pyridine ring decreases and coincides with the order of the C–N bond of the pyrrole ring. Annelation of the benzene ring affects insignificantly the structure and photochromic behavior of indoline spirochromenes.

Keywords: azaindole, photochromic properties, spirochromenes.

28
ORGANIC AND BIOGENIC SUBSTANCES IN THE KHOBI RIVER WATER AND ITS TRIBUTARIES

Gvakharia V.G., Davitaia T.D., Sulamanidze N.D., Butkhuzi T.G. and Supatashvili G.D.

Iv. Javakhishvili Tbilisi State University

A. Janelidze Institute of Geology

The distribution of biogenic and organic substances in the river and sewage waters of the Khobi River basin was studied before and after utilization of wastes of stock-raising farms. The ecological efficiency of utilization of the wastes by their processing into biogas is quantitatively evaluated.

Keywords: Georgian rivers, environment protection, biogenic substances, organic substances, wastes.

29
DETERMINATION OF HEAVY METALS IN THE MASHAVERA RIVER

Supatashvili G.D., Gubadze N.V., Kaviladze I. M., Natsvlishvili G.V., Jikia O.D., Khabuliani K.I. and Tsagurishvili L.B.

Iv. Javakhishvili Tbilisi State University

The Mashavera River is of main importance for water supply in Bolnisi District (irrigation, farming and so on). Therefore, the investigation for its element content, especially for heavy metals, will give the opportunity to estimate objectively the role of the industrial waste waters in the pollution of the Mashavera River. The monitoring performed during the work, can serve as a preface to a preliminary analysis of the rivers in the region.

Keywords: heavy metals, copper, the Mashavera River.

30
DIMERIZATION OF ETHYLENE AND PROPYLENE WITH HETEROGENEOUS CATALYSTS

Kurtskalia K.J., Mikeladze A.G., Jalabadze N.K., Dolidze A.V. and Chedia R.V.

P.Melikishvili Institute of Physical and Organic Chemistry

Georgian Technical University

Heterogeneous catalysts Co-WC, NiO-WC, NiO-Mo₂C, Ni-TiC, CoO-WC and CoO-Mo₂C for ethylene and propylene dimerization were prepared. Nanophase carbide supports were used. The Co-WC and NiCl₂-WC catalysts showed a high activity in the ethylene dimerization process. As a result, the yield of butene was 48-80% (conversion 40-67%). About 70% methylpentenes and 30% hexenes were produced by propylene dimerization. The yield of α-dimers was about 15-22%.

Keywords: olefins, dimerization, nanophase carbides, supports.

31
ABOUT THE CHEMOSTERILIZING ACTIVITY OF SOME ORGANIC PHOSPHOR COMPOUNDS

Samkharadze L.O., Balarjishvili G.I., Magdeeva R.K. and Dolidze A.V.

P.Melikishvili Institute of Physical and Organic Chemistry

There were synthesized biologically active organic phosphor chemosterilizers: diallylamidalkylcyclopentylphosphonic and ehyleneamidallylaminecyclopentylphosphonic acids. The structure of the synthesized compounds was determined by ³¹P NMR spectroscopy. The investigation results demonstrated that the synthesized organic phosphor compounds possess the 100% chemosterilizing activity against some crop pests.

Keywords: organic phosphor compounds, synthesis, chemosterilizing activity.

32
CHANGES IN THE CONTENT OF PROSTAGLANDINS IN THE EXTREME STATE

Gvidani S.A., Sumbadze Ts.M., Mikadze I.I. and Dolidze A.V.

A. Natishivili Institute of Experimental Morphology

P. Melikishvili Institute of Physical and Organic Chemistry

There is demonstrated that the response of the organism to an acute trauma is characterized by individually manifested dynamics of the change in the blood concentration of prostaglandins of various groups, which brings about different results of the process.

Keywords: prostaglandins, extreme state, change, dynamics.

33
CATALYTIC ASYMMETRIC SYNTHESIS OF ACETYLROSINE S-α-PHENYLETHYLAMIDE

Ioseliani D.K., Kurtsikidze T.D., Sarajishvili K.G., Giorgadze N.G. and Dolidze A.V.

P. Melikishvili Institute of Physical and Organic Chemistry

The reaction of hydrogenation of acetylrosine S-α-phenylethylamide on supported catalysts - 1% Pd/SiO₂ and 1% Pd/gumbrine was studied. The influence of temperature and solvent nature on the optical yield of tyrosine was studied. It is shown that the optical yield of RS-diastereomers increases from 12% up to 22% due to the decrease in the temperature. As for the solvent, according to the yield of RS-diastereomers, they are arranged in the following row: CH₃OH<C₂H₅OH<i-PrOh<t-BuOH.

Keywords: aminoacids, synthesis, asymmetry.

34
ON THE STUDY OF SYNTHESIS OF 9-MONOMETHYL-, ETHYL- AND 9,10-DIMETHYL-PERHYDROANTHRACENES

Skhirtladze N.N., Gverdtsiteli D.D, Topuria E.N., Usharauli E.A., Kortava L.M. and Bakhturidze G.Sh.

P. Melikishvili Institute of Physical and Organic Chemistry

There are desribed 9-mono alkyl and 9,10-dialkyl perhydroanthracenes, synthesized by the Benkeser method, using hydration of 9-monoalkyl and 9,10-dialkyl anthracenes in the presence of lithium and ammonium chloride in the ethylamine medium.The structure of the synthesized compounds was determined by IR absorption spectra. The compounds were studied and described using physical and chemical methods.

Keywords: alkylperhydroanthracenes, synthesis, hydration.

35
LASER ACTIVATION OF YEAST

Ormotsadze M.L.

Research Institute of Horticulture, Viticulture and Wine-Making

There is demonstrated the effect of laser emission on the yeast activation. Taking into consideration the issues of adaptability to production, stability, economical efficiency, and environment protection, there has been set as an object intensification of the processes of table wine production on the basis of laser activation of wine yeast.

Keywords: wine-making, yeast, activation, laser emission.

36
THERMAL CRACKING OF PETROLEUM ALKANES (C₁₂-C₂₃) FOR PREPARATION OF LOW (C₂-C₄) AND HIGH (≥C₅) OLEFINS

Areshidze G.Ch., Gajiev-Shengelya M.K., Kutsiava N.A. and Gamezardashvili D.Z.

Iv. Javakhishvili Tbilisi State University

Georgian Technical University

Thermal cracking of liquid normal alkanes C₁₂-C₂₃,isolated from the straight-run diesel fraction of Taribani commercial oil (Georgia), was conducted at 550ºC and atmospheric pressure. The mixtures of gaseous and liquid products were analysed. It was found that olefins prevail both in gaseous (61 mass.%) and liquid (83 mass.%) products of thermal cracking.

Keywords: petroleum alkanes, C₁₂-C₂₃, high olefins (≥C₅), thermal cracking.

37
STUDY ON THE MICROELEMENTS IN STRATAL WATERS OF THE SAMGORI OIL

Gabunia T.I., Goderdzishvili K.G., Edilashvili I.L., Bakhturidze G.Sh. and Shatakishvili T.N.

P. Melikishvili Institute of Physical and Organic Chemistry

The study has been performed on the stratal waters from wells No.4, 10, 23 and 43 of the Samgori Oil Deposit. The given stratal waters were found to be poor in the microelement content. This fact confirms the suggestion that the stratal waters are not the source of those elements in oil and that they are primary elements of petroleum.

Keywords: stratal waters, Samgori oil, microelements.

38
INVESTIGATION OF AROMATIC HYDROCARBONS OF HIGH BOILING FRACTIONS OF THE SAMGORI OIL BY UV SPECTROSCOPY

Lekveishvili E.G., Tevdorashvili M.N., Kartvelishvili E.V., Edilashvili I.L., Asatiani L.P., Charkviani M.K., Svanidze O.P. and Shatakishvili T.N.

P.Melikishvili Institute of Physical and Organic Chemistry

Iv.Javakhishvili Tbilisi State University

There were investigated the aromatic hydrocarbon concentrates of wide boiling (400-500°C) and close-cut (400-420°C, 420-440°C, 440-460°C, 460-480°C, 480-500°C) fractions of the Samgori oil isolated photochemically using maleic anhydride. For the investigation, the UV spectroscopic method was used. The content of hydrocarbons of benzene, naphthalene, phenanthrene, pyrene, and chrysene rows was determined. The results obtained for the wide boiling and close-cut fractions are in good agreement. It is demonstrated that the concentrates of aromatic hydrocarbons isolated with maleic anhydride can be successfully investigated in the wide boiling fractions without their preliminary separation.

Keywords: Georgian oil, wide boiling fraction, aromatic hydrocarbons, UV spectroscopy.

39
SESQUITERPENE HYDROCARBONS IN GEORGIAN OILS

Topuria E.N., Usharauli E.A., Kortava L.M., Mchedlishvili I.J., Skhirtladze N.N., Gverdtsiteli D.D. and Bachturidze G.Sh.

P.Melikishvili Institute of Physical and Organic Chemistry

From the 200-300°C saturated fractions of Georgian oil of two different chemical types (from the Taribani and Satskhenisi Deposits), six relic-character bicyclic sesquiterpene-type hydrocarbons – polymethyldecalins of the C₁₄-C₁₆ composition were isolated and identified. For the analysis, the methods of gas-liquid chromatography and chromatomass spectrometry were used.

Keywords: Georgian oils, chemical composition, polycyclic alkanes, relic hydrocarbons.

40
DETERMINATION OF A CHEMICAL TYPE OF THE OIL FROM THE TARIBANI AND SATSKHENISI DEPOSITS

Topuria E.N., Usharauli E.A., Kortava L.M., Mchedlishvili I.J., Skhirtladze N.N., Gverdtsiteli D.D. and Edilashvili I.L.

P.Melikishvili Institute of Physical and Organic Chemistry

There was carried out the investigation on the determination of a chemical type of the oil from the Taribani and Satskhenisi Deposits (Georgia). It has been established that the oils under investigation belong to the A' and B² types, respectively, (according to A.Petrov's classification) and are characterized by high content of isoprenanes.

Keywords: Georgian oils, classification, hydrocarbon composition.

41
STUDY OF THE RELIABILITY INDICES OF THE CONTROL SYSTEM OF OIL MAIN UNDERWATER PASSAGES

Zhorzholiani G.A.

Georgian Technical University

The study of reliability indices of the control system of oil main underwater passages was carried out. Using the analytical expression of the reliability function of the control system, it was studied for the extremum and the analytical equation for the optimum time was derived.

Keywords: oil main, control system, underwater passages, reliability.

42
PROBABILISTIC-STATISTIC ANALYSIS OF THE CAPACITY OF LIGHT VEHICLES

Karchava O.A. and Karchava Z.O.

Georgian Technical University

There are presented the methods of probabilistic-statistic analysis of the capacity of light vehicles and the results of its estimation in practice under different working conditions. The initial and central moments of the distribution density of the capacity of light vehicles at the permissible working speed depending on road conditions have been determined.

Keywords: vehicles, load-carrying capacity, distribution density, estimation.

43
THE STUDY ON THE DETAILS OF PASSENGER FLOW FORMATION ON BUS ROUTES OF THE CITY OF TBILISI

Bubuteishvili L.M., Dzotsenidze D.D. and Tsverava V.A.

Georgian Technical University

The effect of such factors as the population amount and density, number of vehicles etc. on the formation of passenger flows on bus routes of the city of Tbilisi has been studied. The significance of their effect was substatiated by the methods of mathematical statistics.

Keywords: passenger flow, bus routes.

44
DETERMINATION OF TRANSMISSION RATIOS FOR THE BUSES OPERATING IN THE CITY OF TBILISI

Bubuteishvili L.M.

Georgian Technical University

By computation, there have been determined the rational values of transmission ratios of the final drive and gear box for the buses operating in the city of Tbilisi with consideration of specific features of their operation.

Keywords: bus, transmission, transmission ratios, fuel consumption, specific features.

45
ON THE POSSIBILITY OF APPLICATION OF SOME METHODS OF TECHNICAL MELIORATION OF SOILS FOR THE IMPROVEMENT OF WATER-PHYSICAL AND PHYSICAL-CHEMICAL PROPERTIES OF EXCESSIVELY HUMID SOILS

Mzareulova D.K., Murvanidze Ch.G. and Chanturishvili L.D.

Research Institute of Water Economy and Engineering Ecology

Thermal treatment that is thermal heating of excessively humid heavy clay silt-marshy soils of the Kolkhida Valley, with the irreversible effect, eliminates negative properties of the mineral composition of soils and of hydrophyl amorphous compounds of ferrum and aluminium 1,5-oxides, improves the qualitative composition of humus, forms a water-proof structure, increases water impregnation and water output capacity and, by changing the water-physical and chemical properties, transforms the soil into bonitents.

Keywords: humid soils, heat treatment, water-physical properties, physical-chemical properties.

46
DRUG DELIVERY TODAY

Burjanadze N.G.

Institute of Physical Chemistry

University of Münster, Germany

Much research has been ongoing in the quest to find an ideal system for drug delivery within the human body. Drug delivery is a very important aspect of medical treatment. The effectiveness of many drugs is directly related to the way in which they are administered. Unfortunately, this can make it very difficult to select the proper drug delivery system. Some therapies require that the drug be repeatedly administered to the patient over a long period of time, or in specific amounts at a time in order to maximize drug effectiveness. In many cases, patients often forget, are unwilling, or are unable to take their medication. Furthermore, some drugs are too potent for systemic drug delivery and can cause more harm than good. Therefore, it is of a great advantage to find a drug delivery device that is capable of controlled, pulsatile or continuous release of a wide variety of drugs and other therapeutics that can be safely implanted inside the body. Biocompatability, material reliability, a method of drug release, and processibility are only a few of the many significant factors that need to be considered in creating a successful and effective drug delivery system of this type.

Keywords: drug delivery, system, human body.

47
THE EFFECT OF THE VARIABLE LOW-FREQUENCY MAGNETIC FIELD ON THE IMMUNE STATUS OF PATIENTS WITH CHRONIC OBSTRUCTIVE BRONCHITIS

Dolidze V.A., Kereselidze Z.A., Kirtskhalia V.G., Sakvarelidze E.A., Tarkhan-Mouravi I.D. and Telia A.Z.

I.Koniashvili Georgian Scientific and Practical Center of Resort Science, Physiotherapy and Medicinal Tourism

Tbilisi State Medical University

M.Nodia Institute of Geophysics

It has been established that a course of treatment of the patients having chronic obstructive bronchitis with the variable magnetic field of 50 Hz and 10 mT produces an immunostimulating effect, which is manifested by the increase in T- and B-lymphocytes in peripheral blood and in serum immunoglobulins of the A, G and M classes. The mentioned changes in the immune status were more explicit at a two-hour magnetic field exposure.

Keywords: chronic obstructive bronchitis, immune status, variable magnetic field, effect.

48
DO DUALITIES "WAVES-PARTICLES" AND "ENERGY-INFORMATION" FOLLOW THE CYCLIC REGULARITY OF FORMATION OF STRUCTURAL LEVELS OF MATTER?

Khvedelidze M.A.

Institute of Cybernetics

Georgian Engineering Academy

International Informatization Academy

The analysis of well-known data in the field of physics of the microworld has shown that initial zero oscillations of physical vacuum can control the cyclicity of formation of the duality and uniqueness in the formation evolution of waves-particles. Similarly, the subsequent global cyclic regularity in the evolution of formation of the known structural levels of matter, which was described by the author in earlier works, controls the energy-information duality and uniqueness. All the abovementioned allows us to introduce additional notions: "cyclicity" and "uniqueness", i.e. 1) the cyclicity of the duality of waves-particles and their uniqueness; 2) the cyclicity of the duality of energy-information and their uniqueness. Besides, the globality of the cyclic regularity in the hierarchy of the known regularities of the matter world can be acknowledged.

Keywords: matter, duality, uniqueness, waves-particles, energy-information, cyclic regularity.

49
THE MECHANISM OF THE STAGE FORMATION OF PLANETS

Davarashvili I.O. and Lomidze I.R.

Iv. Javakhishvili Tbilisi State University

The scenario of the stage formation of a planetary system from the gas-and-dust cloud around the protostar is offered, which also takes into account the influence of the previously formed planets on those ones which have formed later. Originally, the planet of the greatest weight is formed at such a distance from the center of the cloud where is the maximum concentration of the fractions remained after the formation of the protostar. In the scope of this scenario, the asymmetry in the distribution of masses and impulsive moments between the internal and external fractions of the planetary system being formed is explained naturally.

Keywords: planetary system, gas-and-dust cloud, planet formation, pulse moment, planet mass, asymmetry.

50
ON THE FIRST METEORITES FOUND IN GEORGIA AND THEIR ISOTOPIC COMPOSITION

Kaviladze M.Sh. and Gubadze N.V.

Iv. Javakhishvili Tbilisi State University

The investigations on the first meteorites found in Georgia have been carried out. That meteorites belong to the class of rare ones as there are represented the grains of refractory minerals of a still unknown genesis. The investigation of several samples apparently showed that in those grains the isotope ratios of elements Ti, Ca, O etc. are abnormally broken in comparison with the average values for the elements of the solar system. Therefore, most specialists consider that they were not formed in the solar system and are much older.

Keywords: meteorites, nuclear astrophysics, isotopic analysis, presolar grains.

51
ON ACOUSTIC FEATURES OF THE AUDITORIUM OF A CINEMA AND ITS FORM

Khabeishvili N.A. and Gogorishvili N.V.

Georgian Technical University

There are considered acoustic features of the auditorium of a cinema. The importance of the shape of the cinema for reception of a film/show under optimum acoustic conditions is emphasized.

Keywords: cinema, auditorium, shape, acoustic conditions.

52
ON SOME CONCEPTS IN THE FIELD OF TECHNOGENIC AND ENVIRONMENTAL SAFETY

Tsikhelashvili I.Z., Tsikhelashvili Z.I. and Gelutashvili A.A.

Georgian Technical University

Basic principles of the policy in the field of technogenic and environmental safety are considered.

Keywords: environment protection, technogenic safety, concepts.

53
ON THE CRITERIA OF ASSESSMENT OF THE ENVIRONMENTAL STATE OF WATER BODIES

Tsikhelashvili I.Z., Tsikhelashvili Z.I. and Gelutashvili A.A.

Georgian Technical University

It is proposed to assess the water quality in Georgian bodies and their tributaries by the water pollution index (WPI). The WPI is the relation between average values of the measured parameters and maximum allowable concentrations.

Keywords: water bodies, water quality, assessment, water pollution index.

54
SOME PECULIARITIES OF THERMO- AND ELECTROPHYSICAL PROPERTIES OF GLASS MATERIALS CONTAINING COPPER AND MANGANESE OXIDES

Tcheishvili T.Sh.

Georgian Technical University

By forced crystallization of easily fusible copper- and manganese-containing borate glasses with low temperature of softening, there has been fabricated a crystalline glass material (composite) having high temperature of deformation initiation and low electric resistance, which make it rather promising for application in practice.

Keywords: crystalline glass material, copper oxide, manganese oxide, properties.