MOAMBE

1999

volume 159 number 3 May-June

 

Botany

Sh. Shetekauri

Biotopes of Petrophytic Flora of the High Mountain Caucasus

Presented by Corr. Member of the Academy G. Nakhutsrishvili, May 25, 1998

Abstract. High mountain florocoenotic community of the Central and Eastern Caucasus and their biotopes are studied. The rich variety of biotopes is revealed in different vertical belts. The lithological location is declared as the centre of speciation.MathematicsBotany

Sh. Shetekauri

Biotopes of Petrophytic Flora of the High Mountain Caucasus

Presented by Corr. Member of the Academy G. Nakhutsrishvili, May 25, 1998

Abstract. High mountain florocoenotic community of the Central and Eastern Caucasus and their biotopes are studied. The rich variety of biotopes is revealed in different vertical belts. The lithological location is declared as the centre of speciation.

Sh. Makharadze

Maximal Idempotent Semigroups in the Binary Relation Semigroup

Presented by Corr. Member of the Academy D. Baladze, December 30, 1998

Abstract. In the present work we consider a class of subsemigroups from the binary relation semigroup BX whose every semigroup has as its right unit on the set X the maximal quasiorder relation, which is different from the universal relation. All maximal idempotent semigroups are described for that class of semigroups.

Mathematics

Ya. Diasamidze, Sh. Makharadze

Right Zeros of Complete Semigroups of Binary Relations

Presented by Corr. Member of the Academy D.Baladze, December 30, 1998

Abstract. In the present paper we consider right zeros of complete semigroups of binary relation.

Mathematics

A. Liparteliani

Additional Properties for Large Inductive Dimension in the Classes of Normal Spaces

Presented by Corr. Member of the Academy N. Berikashvili, May 25, 1998

Abstract. In the present paper there are given inequalities for large inductive dimension in the classes of normal spaces, which are similar to Menger-Urison’s inequalities.

Mathematics

I. Khazhalia

Shift Operator with Respect to Wavelet Bases

Presented by Member of the Academy L.Zhizhiashvili, April 6, 1998

Abstract. The boundedness of shift operator in Lp(R), 1 < p < +¥, with respect to wavelet bases is investigated.

Mathematics

G. Khimshiashvili, A. Ushveridze

On the Average Topological Degree of Random Polynomials

Presented by Corr. Member of the Academy N.Vakhania, April 27, 1998

Abstract. We investigate the average topological degree of random polynomial mappings defined by pairs of random polynomials in two variables. We fix the algebraic degree n of both polynomials and investigate its relation to the average absolute value of topological degree. For certain normal distribution of coefficients, it is established that this average asymptotically grows as n1/2. Some corollaries and related results are also presented.

Mathematics

O. Chkadua, R. Duduchava

Asymptotics of Solutions to the Crack Problem

Presented by Member of the Academy T. Burchuladze, June 22, 1998

Abstract. A complete asymptotics of solutions of the crack problem for an anisotropic elastic body is investigated, when displacement vectors are given on the crack boundary.

Mathematics

O. Chkadua, R. Duduchava

Asymptotics of Solutions to the Crack Problem

Presented by Member of the Academy T. Burchuladze, June 22, 1998

Abstract. A complete asymptotics of solutions of the crack problem for an anisotropic elastic body is investigated, when displacement vectors are given on the crack boundary.

Mathematics

A.Tikaradze

Subdivision of the Simplicial and Semisimplicial Objects

Presented by Corr.Member of the Academy Kh.Inassaridze, November 3, 1998

Abstract. A new proof is given that any simplicial Abelian group or its any subdivision are of the same homotopic type. The relations between the homotopies of subdivision of semisimplicial Abelian groups and corresponding Tor groups are also investigated.

Mathematics

Sh. Tetunashvili

On some Properties of Double Function Series

Presented by Member of the Academy L. Zhizhiashvili, May 11, 1998

Abstract. In the paper we present theorems for some double function series, from which in particular follows that, if double trigonometric series with coefficients aij is convergent on [0,1]2 to a finite function F(t,t) = f(t)×g(t) then aij =ai×bj for each
i
³ 0 and j ³ 0.

Mathematics

A.Danelia

On the Deformation of Zygmund’s Classes Z(w(2); L(Tm))

Presented by Member of the Academy L. Zhizhiashvili, October 12, 1998

Abstract. The problem of deformation of the classes Z(w(2); L(Tm)) with respect to the operator has been studied.

Mathematics

D.Kighuradze

On Product of Separable Metric Spaces

Presented by Corr. Member of the Academy N.Berikashvili, June 15, 1998

Abstract. In this paper some properties of the dimension function dim on the class of separable metric spaces are studied by means of geometric construction which may be realized in Euclidean spaces.

Physics

N. Kekelidze, V. Gogiashvili, Z. Kvinikadze, Z. Davitaya, L. Milovanova,
G. Chikhradze, Z. Chubinishvili

The Optical Absorption Processes in the Infrared Region and the Determination of the Impurity Concentration in n-Type Gallium Arsenide

Presented by Corr. Member of the Academy T. Sanadze, January 29, 1998

Abstract. In the present work the method of determination of electrically active impurity concentration in n-type gallium arsenide is given. The method is based on the investigation of free carrier absorption processes in the infrared region. The corresponding practical recommendations are worked out on the basis of the obtained.

Physics

M.Kaviladze, N.Gubadze, M.Kviriya, G.Natsvlishvili, E.Gamtsemlidze

K-Capcher of 41Ca and d41K as the Possible Cosmochronometer

Presented by Member of the Academy R.Salukvadze, March 30, 1998

Abstract. Potassium isotopic determinations was carried out using the Mattauch-Herzog-type mass spectrometer with laser-ion source in which a renium double-filament source is also placed. As a detector, a micro-channeled plate is used. The investigation shows that in the 55 microvolumes of three stony metheorites (Saratov, Orlovka, Elenovka), significant variations of the isotopic ratio 41K/39 K exceeding 1% are not observed.

Physics

S. Gotoshia

Lazer Raman Spectroscopy Study of Vibrational Dynamics of GaP Crystal Lattice Modified by Boron and Argon Ion
Implantation

Presented by Member of the Academy N. Amaglobeli, June 26, 1998

Abstract. Crystalline GaP surfaces modified by boron and argon ion implantation have been studied by lazer Raman spectroscopy. It has been established that change of full width at half maximum of LO phonon is related with defect-induced stress in the GaP crystal lattice. We have determined amorphization crytical doses for 110keV boron and argon ions by Raman scattering.

Physics

L. Mosulishvili, N. Shonia, V. Dundua

Analytical Parameters of X-ray Fluorescence and Neutron
Activation Analysis Methods for Determination of Gold Content in Ores and Concentrates

Presented by Member of theAcademy G. Kharadze, April 27, 1998

 

Abstract. Among the physical methods of determination of gold content, X ray fluorescence (XFA) and neutron activation analysis (NAA) methods are of particular importance. These two methods make it possible to carry out gold analysis without chemical or mechanical treatment and decomposition of the samples under investigation. On the basis of evaluation of the advantages and disadvantages of these methods, we conclude that with their combined application the analytical possibilities of gold content determination should be increased significantly.

Physics

A. Gerasimov, A. Bibilashvili, Z. Bokhochadze, R. Kazarov, M. Vepkhvadze,
G. Chiradze, N. Kutivadze, Z. Samadashvili

Influence of Photostimulated Diffusion-Motive Force on Impurity Redistribution

Presented by Member of the Academy R. Salukvadze, June 2, 1998

Abstract. On the example of photostimulated diffusion of Al in Si we have shown experimentally that the distribution of impurity atoms depends on the value and direction of diffusion forces arisen as a result of light influence upon the samples, what in its way is defined by volume distribution of the concentration of antibalancing free carriers.

Geophysics

Z. Khvedelidze, N. Ramishvili

The Nature of Changes of Meteorologic Values in the Earth Surface Layer of Atmosphere for Georgian Region

Presented by Member of the Academy B.Balavadze, November 30, 1998

Abstract. The results of our study show a great role of microrelief peculiarities in Earth surface layer in space time distribution of meteorological values.

General and Inorganic Chemistry

V. Rukhadze, Z. Vatsadze, M. Gegeshidze, M.Gumberidze

Chemical Processes during Zinc Sulphide Synthesis and their Influence on the Pigmented Characteristics of Zinc Sulphide

Presented by Corr. Member of the Academy J.Japaridze, April 8, 1998

Abstract. Zinc sulphide synthesis process from zinc chloride solution was investigated. Anomalous fall of solution pH was outlined in that process. It was theoretically explained and confirmed by experimental data that this phenomenon was caused by the formation of base zinc sulphide. Mentioned assertion was proved by derivatographic investigations of the final product. It is recommended to make synthesis in pH 1-3 interval.

Physical Chemistry

D.Jishiashvili, I.Nakhutsrishvili, R.Dzhanelidze, M. Katsiashvili

Mechanism of the Germanium Oxynitride Film Formation

Presented by Member of the Academy K.Japaridze, April 13, 1998

Abstract. Surface reactions taking place at the Ge surface heated in the hydrazine vapour have been investigated in the temperature range of 300-973 K. GeO and Ge3N4 volatile molecules are formed onto the Ge surface. Their subsequent sublimation and condensation on the GaAs substrate results in the germanium oxynitride film formation. It was established, that at the different stages of a film deposition the film composition changes until it reaches Ge3N1.3O1.2.

Analytical Chemistry

Sh. Shatirishvili, Sh. Gigilashvili

Study of Biopolymers in Wines by Gas-Correlation
Chromatography

Presented by Member of the Academy T. Andronikashvili, June 22, 1998

Abstract. Products of pyrolysis of the precipitates of the wines “Kakheti” and “Rkatsiteli” were investigated by gas-correlation chromatography. The obtained chromatograms enabled us to calculate not only the kinetics of the final products but also that of the process of decomposition.

Physical Chemistry

S. Gedevanishvili, Z. A. Munir, Corr. Member of the Academy I. Baratashvili

The Use of an Electric Fields in the Combustion Synthesis of Ceramic Composite

Presented September 21, 1998

Abstract. Using field-activated combination synthesis (FACS), composites of (1 - x) MoSi2-xSiC were prepared directly from elemental powders. Systems with
0 < x
£ 0.18 can sustain a combustion wave but the product contained unreacted Si and C in addition to MoSi2. Systems with x > 0.18 do not sustain a wave without the application of an external electric field. Composites of MoSi2 and b-SiC can be synthesized for 0 £ x £ 1.0 in the presence of fields above threshold field values. The threshold value decreased with increasing x value. Both combustion wave velocity and temperature increased nearly linearly with an increase in field above the threshold value for any given composition (x value). Effect of the magnitude of the field on the nature and microstructure of the product were also investigated.

Geology

I. Kvantaliani

On the Lower Barremian of the Southern Limb of the Racha-Lechkhumi Syncline (Western Georgia)

Presented by Corr. Member of the Academy M. V. Topchishvili, April 13, 1998

Abstract. On the Southern limb of the Racha-Lechkhumi syncline, within the lower Barremian sediments, ammonites of Holcodiscidae family have been identified for the first time. An attempt of zonal subdivision of the Lower Barremian of the section in v. Nikortsminda outskirts in correlation with the Lower Barremian the Northern limb of the mentioned structure is made. Now on these grounds we can affirm that Holcodiscidae occurs not only on the Northern limb of the Racha-Lechkhumi syncline, as it was supposed earlier, but also in the section of Nikortsminda outskirts on the Southern limb, i. e. both in deepwater and shallow water parts of a neritic region of the sea. Recent data specify the spreading areal of “ammonitic facies of the Barremian”.

Geology

J.Meskhia

Geomorphology of Plains and Mountains: Interaction and
Interrelation (on the Example of West Georgia)

Presented by Corr. Member of the Academy Z.Tatashidze, December 30, 1998

Abstract. Relief of West Georgia is considered in the united geomorphologic system: morphostructure -morphosculpture- correlated sediments, i.e. geologic-geomorphologic formation. The morphostructural analysis method with morphostructural and morphosculptural approach is worked out.

Geography

I. Bondirev, G. Khachapuridze, M. Bochoridze

The Spatial Differentiation of the Earth Crust’s Energetic
Parameters and Geography of Ancient Civilizations

Presented by Corr. Member of the Academy Z. Tatashidze, April 6, 1998

Abstract. The existence of definite correlation among the ancient civilizations and energetic knots, which are located in the Earth crust, is considered in the present article. The emphasis is done on the spontaneous character of these knots and the wide range of fluctuation of the energetic knots.

Hydrology

N. Bolashvili

Attempt of Flood Forecast on the Basis of the Theory
of Recognition Images

Presented by Member of the Academy G. Svanidze, May 4, 1998

Abstract. The theory of images recognition and OP method is considered. Hypersurface was constructed giving the possibility to forecast water discharge increase with concrete values of the process causing factors.

Heat Engineering

T. Magrakvelidze, N. Bantsadze, N. Lekveishvili

Similitude Equations for Calculating Heat Transfer Coefficient in Stirred Tanks

Presented by Corr. Member of the Academy P. Merabishvili, April 13, 1998

Abstract. Heat transfer from smooth and rough surfaces in stirred tank has been investigated experimentally. It was shown that two-dimensional artificial roughness increases heat transfer intensity for about two times. Equations for calculating heat transfer coefficient both for smooth and rough surfaces are obtained.

Hydraulic Engineering

F. Shatberashvili , O. Sichinava, A. Siamashvili

Some Hydraulic and Hydromorphometric Regularities of Flow in Stable Beds

Presented by Member of the Academy O. Natishvili, February 3, 1999

Abstract. The approaches for determining soil bed parameters were studied. New dependence to calculate the permissible velocities for types of soils is propos

Hydraulic Engineering

T.Gvelesiani, R.Danelia, G.Berdzenishvili

Mathematical Model of Nonstational Hydrodynamic Processes of Mobile Mud Flow on the Bottom of Reservoir

Presented by Member of the Academy O.Natishvili, April 10, 1999

Abstract. Wave process generated in reservoir as a result of constant thickness mud flow spreading on its bottom is regarded. Corresponding solution of flat boundary problem is obtained on the basis of the theory of small amplitude waves and assumption that liquid is ideal, but its movement is potential. The results of computer calculations are given for one of the examples: wave profiles for various moments of mud flow spreading on the bottom.

Automatic Control and Computer Engineering

V. Mdzinarishvili

New Orthonormal Systems Based on Even Numbers

Presented by Member of the Academy V. Chichinadze, October 12, 1998

Abstract. New orthonormal systems based on even numbers are received. The new orthonormal system based on odd number is used. Illustrative example is given.

Botany

Sh. Shetekauri

Biotopes of Petrophytic Flora of the High Mountain Caucasus

Presented by Corr. Member of the Academy G. Nakhutsrishvili, May 25, 1998

Abstract. High mountain florocoenotic community of the Central and Eastern Caucasus and their biotopes are studied. The rich variety of biotopes is revealed in different vertical belts. The lithological location is declared as the centre of speciation.

Plant Physiology

E. Chkhubianishvili, L. Kobakhidze, Sh. Chanishvili

UV-Radiation Effect on Content of Total Protein and Productivity of some Vegetable Cultures

Presented by Member of the Academy G. Sanadze, April 13, 1998

Abstract. Influence of additional ultraviolet (UV) radiation in field conditions (using DRT-400 lamp) was studied on experimental plants of carrot (Daucus sativus L.), radish (Raphanus sativus L. var. radicula D. C.) and beet (Beta vulgaris L.). In studied plants the highest content of total protein was found in the middle period of vegetation. The following intensities of radiation; 60-133 “C” section, 1000-1400 “A” section and 9500-20400 J. m-2.min-1 PhAR seemed to be the most favorable for plant productivity. It is supposed, that in field conditions photoreactivation of negative effect of short wave UV-radiation takes place.