SUMMARY
SCATTERING OF A LASER BEAM IN A RANDOMLY INHOMOGENEOUS ISOTROPIC ABSORPTIVE MEDIUM
Jandieri G.V., Surmanidze I.S. and Jandieri V.G.
Georgian Technical University
Log amplitude and phase variances of the Gaussian beam propagating in a randomly inhomogeneous medium with spatial fluctuations of a refractive index and absorption were obtained using the smooth perturbation method. Statistical characteristics of the scattered radiation were calculated.
Keywords: random medium, wave, beam, absorption, correlation functions, phase.
COMPARISON OF TRELLIS AND CONCATENATED CODES FOR DIFFERENTIAL MINIMUM SHIFT KEYING (DMSK)
Abzianidze E.E.
Georgian Technical University
Two different approaches to constructing the encoded DMSK systems based on binary convolutional codes are compared. Trellis codes are based on matched codes, and concatenated codes – on known optimal convolutional codes. In the latter case, simple soft-output demodulation is proposed for DMSK. Various simulation results are presented.
Keywords: minimum shift keying, convolutional codes, trellis codes
ON SOME RESTRICTION OF QUASI-IRREGULAR NUMBERS
Bulia N.P.
Georgian Technical University
Asymptotics of quasi-irregular numbers is considered.
Keywords: quasi-irregular numbers, restriction, calculation.
SYNTHESIS OF ASYMMETRIC, SPECIALLY ORIENTED SECOND-ORDER DESIGNS WHICH ARE MOST CLOSE TO ORTHOGONAL ONES
Beraia N.O. and Zedginidze I.G.
Georgian Technical University
Asymmetric, specially oriented second-order designs, which are most close to orthogonal ones, for two variables both with and without central points were synthesized. Simplified expressions for calculating the regression equation factors were derived.
Keywords: asymmetric specially oriented designs, orthogonal designs, synthesis, regression equation.
DUPLICATION AND ARCHIVING SYSTEM IN LOCAL COMPUTER NETWORKS
Khurodze R.A., Kul'ba V.V., Gorgidze I.A., Karsanidze T.V., Gorgidze D.A. and Javakhadze G.S.
Georgian Technical University
Institute of Control Problems, Moscow
The analysis of various possible schemes of data archiving in local computer networks has been carried out. Such characteristics as the possibility of data keeping and the problem solution time were determined.
Keywords: local computer network, information, duplication, archiving.
LOCATION OF COLLECTIVE USAGE ARRAYS IN CORPORATE COMPUTER NETWORKS
Khomeriki I.O.
Georgian Technical University
The algorithm of complete search of versions of location of collective usage arrays in distributed corporate computer networks is analyzed. Basing on the composed programs for solving the problems with the use of the heuristic algorithm, the algorithm of complete search and the analysis of the obtained calculation, the conclusion about acceptability of the offered heuristic algorithm of complex location of hypertext systems for development and modernization of the distributed corporate computer networks has been made.
Keywords: computer networks, information distribution, algorithm.
CALCULATION OF THE THREE-DIMENSIONAL TWISTED FLOW
Manjgaladze A.A. and Natriashvili T.M.
Iinstitute of Machine Mechanics
A mathematical model for calculating the three-dimensional twisted gas flow in an engine cylinder is presented. The model is based on the method of finite elements. A software package that allows to perform numerical experiments for revealing the optimum configurations of the engine gas-air channel components was composed.
Keywords: engine, gas flow, heat transfer, mathematical model.
RESULTS OF THE DESIGN-EXPERIMENTAL INVESTIGATION OF THE THREE-DIMENSIONAL GAS FLOW IN A DIESEL CYLINDER
Manjgaladze A.A. and Natriashvili T.M.
Institute of Machine Mechanics
The results of optimization of the gas flow in a diesel cylinder are presented. This optimization allowed to improve the gas-exchange process and, thus, to improve the diesel effective indexes. Calculation was based on the method of finite elements. As a result of numerical experiments, the best configurations of the gas-air channels were revealed.
Keywords: diesel, gas flow, heat transfer, calculation.
APPLICATION OF METHODS OF THE THEORY OF MULTIFACTOR EXPERIMENT PLANNING FOR INVESTIGATION OF THE IRON COATINGS HARDNESS
Chalaganidze Sh.I., Katsitadze J.V., Sarjveladze N.N. and Khizanishvili A.A.
Georgian State Agrarian University
Application of quantitative mathematical methods of the theory of similarity and dimensionality and of experiment planning for investigation of the iron coatings hardness is considered. The analysis of the equations showed that the hardness of iron-nickel coatings is maximally affected by the combined criterion. This criterion can be considered as significant at optimization of the electrolyte content and electrolysis conditions for obtaining the maximum hardness of the coatings.
Keywords: iron coatings, hardness, theory of experiment planning, calculation.
ON BASIC STAGES OF CALCULATING THE RELIABILITY OF COMPUTING HARDWARE WITH REDUNDANT OPTOELECTRONIC ELEMENTS
Kurdadze M.A.
Georgian Technical University
Seven stages of analyzing the reliability of optoelectronic coupling of the redundant hardware are described. Realization of these stages gives a complete pattern of evaluation of failure-free operation of the multifunctional equipment. A general structure of the functional redundant module is presented. By its example, basic characteristics of the computing hardware are analyzed.
Keywords: computing hardware, optoelectronic elements, redundancy, calculation.
A DEVICE FOR CONTROLLING FLATNESS AND ROUGHNESS OF GLASS PLATES FOR LIQUID CRYSTAL DISPLAYS
Avaliani J.I., Jokhadze P.D., Kordzakhia I.I. and Chkheidze M.A.
Optica Research Institute
The methods and design of a device for complex control of flatness, roughness and wedge-likeness of glass and quartz polished plates used in production of liquid crystal displays are presented. The method of deflection of a lazer beam from an ideal direction is used for controlling the flatness and wedge-likeness of the plates. By measuring the value of the beams reflected from two different points of the surface under control. The scheme of application of the device in mass production of plates for LC displays has been worked out.
Keywords: liquid crystal display, flatness, roughness, wedge-likeness, lazer beam.
DETERMINATION OF THE THERMAL STRESS APPEARING AT CUTTING WITH LOW-TUNGSTEN ALLOYS
Tsotskhadze V.V., Khvichia G.V. and Gvazava K.B.
Georgian Technical University
The equations convinient for calculation of mechanical and thermal stresses appearing at cutting with hard-facing low-tungsten alloys have been derived. The equations take into consideration the stresses of the cutting part of the instrument, that arise under power load. Calculation and graphic data are presented. The chart of heat and temperature distribution of the cutting part is demonstrated.
Keywords: cutting instrument, thermal stress, calculation.
CUTTING TEMPERATURE AND FORCES AT TURNING CAST IRON WITH LOW-TUNGSTEN HARD ALLOYS
Gvazava K.B.
Georgian Technical University
The equation for calculating the cutting temperature at specified cutting speed, feed, depth, and cast iron hardness has been derived. Basing on this equation, the cutting speed was calculated. Then the equation of thermal stress appearing in the cutting tool was obtained. The experimental data showed that the cutting speed affects insignificantly the cutting forces.
Keywords: cast iron, turning, cutting temperature, cutting force, low-tungsten alloy.
DEPENDENCE OF THE MAXIMUM DEPTH OF CORROSIVE RECESSES IN OPERATING OIL PIPELINES ON THE GROUND CORROSIVE ABILITY
Danelia S.A., Namgaladze D.P. and Samkharadze Z.Z.
Georgian Technical University
The results of investigation of the dependence of the maximum depth of corrosive recesses in operating oil pipelines on the ground corrosive ability are presented. It is shown that, for approximation of the probability distribution function, three-parametric Wailbull approximation can be used. The obtained calculation data allow to establish the distribution of the maximum depths of corrosive recesses in oil pipelines depending on the ground corrosive ability and to determine the maximum permissible operating pressure in the pipeline.
Keywords: oil pipeline, corrosive recesses, ground corrosive ability.
DETERMINATION OF THE DISTRIBUTION PROBABILITY OF THE INTENSITY OF CORROSIVE RECESSES WIDTH AND LENGTH IN OIL PIPELINES
Samkharadze Z.Z.
Georgian Technical University
To determine the distribution probability of the intensity of corrosive recesses width and length, a real oil pipeline of the 5300 m length and the 0.7112 m inner diameter was considered. Basing on the obtained results, it is possible to develop a simple procedure of diagnosing the operating oil pipelines. Besides, pre-conditions for determination of the pipeline internal roughness have been formed, that will allow to determine the hydraulic resistance coefficient and, thus, to establish the optimal hydraulic regime.
Keywords: oil pipeline, corrosive recess, distribution of width and length, probability.
INFLUENCE OF CORROSIVE RECESSES ON THE CHANGES IN THE AVERAGE FLOW VELOCITY IN OIL PIPELINES
Danelia S.A. and Samkharadze Z.Z.
Georgian Technical University
The influence of corrosive recesses on the changes in the average flow velocity in oil pipelines has been investigated. Calculation is given for the corrosive recess of a spherical shape. Basing on the experimental data and as a result of the calculation, it is shown how the average flow velocity changes along the corrosive recess. It was established that the average flow velocity V is less than V0 only by 3-4% even in the maximum recess section.
Keywords: oil pipeline, corrosive recesses, flow velocity.
LEGS TIMING FOR RHYTHMIC PACE OF A SIX-LEGGED ROBOT
Machavariani G.A.
Institute of Cybernetics
Legs timing for rhythmic pace of a six-legged robot based on a composition concept is offered. To balance the instability of the step cycle stages when walking on a rough surface, it is offered to include a waiting stage into the step cycle.
Keywords: walking robot, legs timing, rhythmic pace.
ON THE METHOD OF REGISTERING A ROAD ACCIDENT
Gugberidze M.K. and Epitashvili A.D.
S.-S. Orbeliani Tbilisi Pedagogic University
A method of registering a road accident with subsequent processing of measurement data for calculation of braking kinematics by a braking trace and of impact dynamics by residual deformation has been developed. The proposed method is distinguished by a large data volume and high accuracy of registering the road accident. The corresponding educational program is highly effective for training the specialists.
Keywords: road accident, registering, data processing.
INVESTIGATION OF THE MELT OF SUPERCOOLED LIQUID GALLIUM AND THE STRUCTURE OF AN OXIDE FILM FORMED ON ITS SURFACE
Kutelia E.R., Maisuradze N.I., Kervalishvili P.D., Kutelia B.E. and Eristavi B.G.
Georgian Technical University
Republican Center of Structural Research
The structure of ultra-pure liquid gallium in a supercooled condition and the oxidation process of a smooth surface of liquid gallium at room and lower temperatures in the atmospheric and UHV environment were investigated. Complex study by SEM, TEM and Auger spectrometry showed the following:
Ultra-pure liquid gallium (>8N) in an overcooled condition at room temperature is characterized by a clustered structure, an atomic configuration of which is very close to radial distribution of the atomic configuration of crystalline gallium in β- and δ- metastable phases.
At room temperature in atmospheric environment, during a long period of time, a thin (~500nm) elastic oxide film with an amorphous structure was formed. The film had even thickness and porosity with dispersion of pore dimensions in the range of 10-1000 nm. In the UHV environment, at room temperature, chemical adsorption of oxygen atoms and physical adsorption of carbon atoms were identified.
In electron diffraction patterns, four diffuse haloes were observed at S1=1.76Å-1, S2=3.083Å-1, S3=3.48Å-1 and S4=5.28Å-1, that did not coincide with the intensity distribution for Ga2O3 phases.
The Auger-spectrometric analysis of oxide films on the surface of liquid gallium in the UHV environment and in the atmosphere revealed that the composition was Ga2O and the formation of oxide started just after dissociative adsorption.
Keywords: supercooled liquid gallium, melt, oxide film, structure, investigation.
MATHEMATICAL SIMULATION OF THE SYNTHESIS OF THE COMPLEX OF CHROMIUM(III) TETRAOXOARSENATE(V) WITH β -ACETYLPHENYLHYDRAZINE USING THE EXPERIMENTAL DESIGN METHOD
Kekenadze M.G., Rusia M.Sh., Bezarashvili G.S., Dzotsenidze Z.G. and Gigauri R.D.
Iv. Javakhishvili Tbilisi State University
Development of the static model of the synthesis of the complex of chromium(III) tetraoxoarsenate(V) with β-acetylphenylhydrazine is considered. The second-order multifactorial design method was applied and the empirical regress
ion equation, which adequately describes the dependence of the product yield (in % weight) on the temperature and the hydrogen ion index, was derived. Strong interaction of these factors was quantitatively determined. The obtained results showed that it is possible to predict experimental conditions which provide the increase in the product yield.Keywords: mathematical complex, experimental design, complex, tetraoxoarsenate, β-acetylphenylhydrazine.
X-RAY STRUCTURE ANALYSIS OF THE COMPOUND [Mn2(m-OBH)2(SO4)2(OH2)4]
Shvelashvili A.E., Miminoshvili E.B., Bel'sky V.K., Vardosanidze T.O. and Tavberidze M.G.
Tbilisi State Medical University
Georgian Technical University
L. Karpov Institute of Physical Chemistry, Moscow
The structure of a manganese(II) compound with metaoxybenzoylhydrazine (m-OBH=C7H8O2N2). It was established that the complex [Mn2(m-OBH)2(SO4)2(OH2)4] has a dimeric structure. The m-OBH molecule fulfils the function of a bidentate cyclic ligand, and the SO42- anion – the bidentate – bridge function. It was also established that the compound [Co(BH)(HisH2)(OH2)2]Br2 exhibits a spasmolytic activity.
Keywords: coordination compounds, manganese, benzoylhydrazine, X-ray structure analysis.
CRISTALLINE AND MOLECULAR STRUCTURE OF [Cu(CH3COO)(DNB)(ÎÍ2)2]·H2O
Shvelashvili A.E., Miminoshvili E.B., Bel'sky V.K., Amirkhanashvili K.D., Adeishvili G.P. and Sakvarelidze T.N.
P. Melikishvili Institute of Physical and Organic Chemistry
Georgian Technical University
L.Karpov Institute of Physical Chemistry, Moscow
To establish the content and structure of model coordination compounds of copper with dinitrobenzoates (DNB) of end secondary amines, cooper(II) diaquocetatodinitrobenzoate monohydrate was synthesized in the form of a monocrystal. A dimeric structure of the synthesized complex [Cu2(CH3COO)2(DNB)2(OH2)4]·2H2O (where DNB is 2,4 dinitrobenzoate-C6H3(NO2)2COOH ) was established. It was shown that DNB fulfils the function of a monodentante ligand, and acetate – the monodentate – bridge function.
Keywords: acetate, dinitrobenzoate, x-ray structure analysis.
CRISTALLINE STRUCTURE OF GUANIDINOCITRATE
Miminoshvili E.B., Bel'sky B.K., Kutelia E.R., Sakvarelidze T.N. and Beridze L.A.
P. Melikishvili Institute of Physical and Organic Chemistry
Georgian Technical University
L.Karpov Institute of Physical Chemistry, Moscow
X-ray structure analysis of guanidinocitrate (GunH)3(Cit)·2H2O has been carried out. The structure was interpreted by a direct method and defined more precisely in anisotropic (for non-hydrogenic atoms) and isotropic (for H atoms) approximation. The experimental data and the results of their dscussion are presented.
Keywords: citrate metalates, guanidine, X-ray structure analysis.
FORMATION OF FREE RADICALS PHOTOSENSITIZED BY BILIRUBIN
UNDER THE VISIBLE LIGHT EFFECT
Chikvaidze E.N., Gogoladze T.V., Kirikashvili I.N., Kalatozishvili A.Z
and Chikvaidze G.I.
Iv.Javakhishvili Tbilisi State University
The photosensitized formation of free radicals of bilirubin with g = 2.003 and ΔH=1.0 mTI under the effect of blue light at λmax = 450 nm was studied by means of electronic spin resonance (ESR). Irradiation of the sample in vacuum with visible light did not cause the formation of free radicals. Irradiation of the bilirubin powder and its solution in chloroform led to the formation of the bilirubin radical. The analysis of the spectra (ESR) of the bilirubin powder and its solution in chloroform showed that the introduced free radical belonged to bilirubin and not the solvent. Irradiation of the bilirubin solution in chloroform causes the appearance of the absorption spectral line at λmax = 650 nm, that is characteristic of the biliverdin solution in chloroform.
Keywords: photosensibilization, bilirubin, free radical, phototherapy, electronic spin resonance.
THE EFFECT OF THE CHROMIUM VALENT STATE ON THE RESULTS
OF ATOMIC ABSORPTION AND ATOMIC FLUORESCENCE SPECTROSCOPY OF CHROMIUM
Rcheulishvili A.N., Tsibakhashvili G.G. and Kaadze K.D.
E.Andronikashvili Institute of Physics
The dependence of atomic absorption and atomic fluorescence signals on the conditions of their determination was studied for chromium(VI) and chromium(III). It was shown that, in the flame C2H2 - air, the analytical signals from the Cr(VI) and Cr(III) solutions of the same concentration do not differ significantly, the signal of Cr(III), as a rule, exceeding that of Cr(VI). When using the flame propane-butane-air, the sensitivity of Cr(VI) determination becomes twice as large as that of Cr(III). The influence of HCl on the atomic absorption and atomic fluorescence signals of the Cr(VI) solutions in the propane-butane-air flame was studied. It was shown that there does not occur reduction of Cr(VI) to Cr(III) in aerosol drops heated by the flame.
Keywords: chromium, valency, atomic absorption, atomic fluorescence, spectroscopy.
ON IMPROVEMENT OF THE DESICCATING ABILITY OF NATURAL ZEOLITES
Andronikashvili T.G., Kordzakhia T.N. and Eprikashvili L.G.
P. Melikishvili Institute of Physical and Organic Chemistry
The dada testifying that the temperature factor affects the efficiency of desiccation of organic solvents with natural zeolites are presented. The optimum temperatures of heating the absorbing column for desiccation depending on the solvent origin have been calculated.
Keywords: natural zeolites, solvent, desiccation.
ON THE SELECTIVITY OF ADSORPTION OF SOME NONFERROUS METALS BY LOMONTITE-CONTAINING ROCKS OF GEORGIA
Urotadze S.L., Kvernadze T.K., Osipova N.A. and Devdariani R.R.
P.Melikishvili Institute of Physical and Organic Chemistry
The selectivity of Georgian lomontite-containing rocks in relation to the cations of some nonferrous metals was studied. The investigation results showed that the lomontite-containing rocks can be used for both isolation of bivalent cations of some nonferrous metals (Cd, Cu, Mg, Co, Zn, Ni and Cr) from various solutions and their separation.
Keywords: lomontite, selectivity, nonferrous metals, cations, isolation, separation.
INVESTIGATION OF ACID CONVERSION OF THE DERIVATIVES OF D-FRUCTOSE AND D-MALTOSE BY GAS-LIQUID CHROMATOGRAPHY
Sidamonidze N.N., Vardiashvili R.O., Okujava N.G., Isakadze M.O. and Gakhokidze R.A.
Iv. Javakhishvili Tbilisi State University
Gas-liquid chromatographic analysis of the derivatives of D-fructose and D-maltose was carried out at the 40 ml/min rate. It was established that, under the action of lead hydroxide, 3-0-p-toluenesulphonyl-a -D-fructose was converted into a - and b -D-glucometasaccharinic acids with the ratio of 5:1. Similar treatment of 1-0-p-toluenesulphonyl-b -D-fructose gave 2-deoxy-D-gluconic acid. It was established that, during the reaction of acid isomerization of the derivatives of D-maltose, the break of glycosidic bonds did not take place, and 4-0-(a -D-glucopyranosyl)-2-deoxy-D-gluconic acid was obtained.
Keywords: acid conversion, D-fructose, D-maltose, investigation.
BIS (2,3-DIOXYNAPHTALENE) BORANES OF SOME AMINES
Turiashvili L.G., Jioshvili B.D., Machkhoshvili R.I., Ugulava L.A. and Parunashvili N.A.
Iv. Javakhishvili Tbilisi State University
Coordination compounds of boron with 2,3-dihydroxynaphtalene amines have been synthesized.
The coordination compounds of tetravalent boron were investigated by physical and chemical methods (elementary analysis, thermogravimetry, IRspectroscopy, conductometry, roentgenophase analysis). In this compounds, protonated amines, as cations form ionic association with the complex anion.
Keywords: 2,3-dioxynaphtalene, boranes, amines.
COORDINATION COMPOUNDS OF d-METALS(III) DITHIOARSENATES(V) WITH β-ACETYLPHENYLHYDRAZINE
Gakhutishvili M.A. and Gigauri R.D.
Iv. Javakhishvili Tbilisi State University
Coordination compounds of some d-metals(III) dithioarsenates(V) with β-acetylphenylhydrazine were synthesized and investigated. The obtained results allow to make the conclusion that β-acetylphenylhydrazine molecules bounds to the metal central atom via the atom of amine group nitrogen and the atom of carbonyl group oxygen.
Keywords: dithioarsenate, coordination compounds, β-acetylphenylhydrazine, complex.
MONOMETHYL ESTER OF PIROGALLOL AND MONOETHYL ESTER OF PYROCATECHIN IN GEORGIAN BRANDY ALCOHOLS
Eradze N.N., Bezhuashvili M.G. and Larionov O.G.
Scientific Institute of Horticulture, Viticulture and Wine-Making
Institute of Physical Chemistry, Moscow
Monomethyl ester of pyrogallol and monoethyl ester of pyrocatechin in Georgian brandy alcohols of different maturity periods were studied. Existence of the abovementioned compounds indicates oxidative transformation of cyringic and vanillin during their keeping period.
It was established that quantitative accumulation of the investigated esters in individual oak trunks (barrels) proceeds in different ways. Monomethyl ester of pyrogallol prevails that points to the intensive transformation mainly of syringic aldehyde than of vanillic one.
Keywords: brandy alcohol, pyrogallol, pyrocatechin, monomethyl ester, monoethyl ester.
STUDY OF SOME CHEMICAL COMPONENTS OF PINK LIQUEUR WINE "RACHA"
Bardavelidze E.N. and Sirbiladze A.L.
Research Institute of Horticulture, Viticulture and Wine-Making
Some chemical components of the pink liqueur wine Racha, in particular extractive phenolic acids, phenolic aldehydes and some volatile compounds, were determined. The role of peels of the Alexandrouli and Mujuretuli grapes in formation of phenolic acids and phenolic aldehydes in the wine was established.
Keywords: pink wine, phenolic acids, phenolic aldehydes.
STUDY OF GEORGIAN OILS AND PRODUCTS OF THEIR PROCESSING
Edilashvili I.A., Khetsuriani N.T., Gventsadze E.V. and Kandelaki A.Sh.
P. Melikishvili Institute of Physical and Organic Chemistry
Georgian-American Oil Processing Company GAOR
Physical and chemical properties of the oils and oil blends obtained from Mirzaani, Norio, Satskhenisi, Samgori, Samgori South Dome, Taribana, Teleti, Western Rustavi and Ninotsminda deposits and specifications of the oil products have been studied. According to the studies, Georgian oils are characterized as low-sulphur oils with low gum-asphalt compounds.
After processing the abovementioned oils and oil blends, the following product split was achieved: gasoline distillate, diesel and jet fuels and fuel oil. All these products comply with the standard requirements.
Keywords: Georgian oils, products of oil processing, investigation.
IMPROVEMENT OF THE PLANT FOR OIL PRIMARY PROCESSING
Gventsadze E.V., Khetsuriani N.T., Edilashvili I.A., Shavgulidze G.G. and Kandelaki A.Sh.
Georgian-American Oil Processing Company GAOR
The improved process scheme of an oil processing plant is presented. Installation of an additional heat exchanger in the atmospheric column allowed to increase the yield of petrol and diesel fractions. The offered design envisages the installation of a vacuum unit equipped with a hydrocirculating device, that provides the optimum isolation of bright oil products.
Keywords: oil, processing, process scheme, modernization.
ON APPLICATION OF THE PYRAMID THERAPY FOR TREATMENT AND REHABILITATION OF SPORTSMEN
Nanitashvili T.Sh. and Shonia G.S.
Georgian Engineering Academy
PYRAMID Medical and Rehabilitation Center
Application of pyramid therapy for rehabilitation of sportsmen of various kinds of sports is considered. In the method, an original medical device constructed in a pyramidal shape is used. The method provides rapid and efficient recovery of the bioenergetic and psychoemotional balance of sportsmen and accelerates healing of traumas.
Keywords: pyramid, device, therapy, rehabilitation of sportsmen.
ON NATURAL AND ARTIFICIAL INVENTIONS
Khvedelidze M.A.
Georgian Engineering Academy
Institute of Cybernetics
By various examples, the validity of the extension of the notion "invention" to the field of natural systems is considered. Basing on the fundamental-artificial unity and considering the time factor of realization, the priority of the invention author-evolution of the nature or a man is established.
Keywords: natural inventions, artificial inventions.
MATHEMATICAL DESCRIPTION OF MOISTURE EXCHANGE IN THE LUBRICATION-OIL SYSTEM OF A SHIP DIESEL
Tsetskhladze D.A. Gogitidze N.A. and Jijavadze O.A.
Batumi State Marine Academy
Mathematical description of the moisture-exchange processes in the crankcase of a ship diesel is presented.
Keywords: ship diesel, lubrication-oil system, moisture exchange.
EVALUATION OF THE EFFECT OF THE FUEL STRUCTURAL STATE ON SEGMENT FORMATION
Jijavadze O.A., Tsetskhladze D.A. and Gogitidze N.A.
Batumi State Marine Academy
The effect of the fuel structural state on sediment formation is evaluated. The dependence of the sedimentation rate on the size and density of structural systems is presented.
Keywords: ship, fuel, structural state, sediment formation.
ON THE PROCESS OF GAS OUTFLOW IN A VEHICLE PNEUMATIC SUSPENSION
Bogvelishvili Z.V.
Georgian Technical University
The possibility of application of the gas flow equation for describing the process of gas outflow in a vehicle pneumatic suspension is considered. The offered method takes into consideration the gas flow regime.
Keywords: vehicle, pneumatic suspension, gas flow, calculation method.
Karakozov K.G. and Chikhladze T.M.
Institute of Cybernetics
The jointless follow-up system, which does not consume electric power, is described. This system does not have any rubbing components or actuators. In comparison with its analogues, such a system is more reliable, more effective and more attractive.
Keywords: follow-up system, jointless device.
PORTATIVE RAPID MEDICAL THERMOMETER
Kekelidze G.P. and Kekelidze D.G.
Iv. Javakhishvili Tbilisi State University
On the basis of the InPxAs1-x compound, a rapid portative electronic medical thermometer has been developed.
Keywords: medical thermometer, InPxAs1-x compound.
EQUIPMENT FOR STERILIZATION OF STOMATOLOGICAL INSTRUMENTS
Kekelidze G.P. and Kekelidze D.G.
Iv. Javakhishvili Tbilisi State University
The technology and portative equipment for sterilization of the AIDS and other viruses have been developed. The equipment is used in stomatological policlinics. The γ-irradiation serves as a low-power source of irradiation.
Keywords: stomatological instrument, sterilization, AIDS.
ON THE HYPOTHESIS EXPLAINING THE LAWS OF NATURE
Shvelidze V.V.
Georgian Engineering Academy
Iv. Javakhishvili Tbilisi State University
One hypothesis explaining the laws of nature is considered. The hypothesis implies the existence of a really elementary particle with unique properties and the uniform internal mechanism of the processes proceeding in nature. Some results of calculations carried out on the basis of this hypothesis are presented.
Keywords: laws of nature, hypothesis, internal relation mechanism.
