GENERALIZED CONCATENATED CODES BASED ON SIGNAL CONSTELLATIONS OVER GAUSSIAN INTEGERS

Tsiklauri G.Z., Shavgulidze S.A., Asanidze A.V. and Freudenberger J.

Georgian Technical University

University of Applied Sciences, Konstanz, Germany

Abstract. Codes over Gaussian integers can be used for coding over two-dimensional signal spaces, e.g. using quadrature amplitude modulation. This work demonstrates that the concept of set partitioning can be applied to Gaussian integer constellations that are isomorphic to q-ary extension fields. It is shown that it is always possible to partition the Gaussian integer constellations into subsets such that the minimum squared Euclidean distance of each subset is strictly larger than in the original set. For many cases this construction results in a maximum minimal distance partitioning.  This enables generalized concatenated code constructions for codes over Gaussian integers.

Keywords: generalized concatenated codes, signal constellations, signal set partitioning, Gaussian integers.

 

SUMMARY

SOLUTION TO THE TWO-DIMENSIONAL PROBLEM OF THERMODIFFUSION

Bezhuashvili Yu.A.

Georgian Technical University

The paper deals with the investigation of a plane dynamic problem of the conjugate theory of thermodiffusion with mixed boundary conditions for multiply-connected domains. By the potential method, singular integral equations and Laplace transform, the theorems of existence and uniqueness of the solution are proved.

Keywords: thermodiffusion, dynamic problem, singular integral equation, Laplace transform, asymptotics.

 

SUMMARY

ANALYSIS OF SUBSCRIBERS’ MOBILITY PROCEDURE CHARACTERISTICS AND ALGORITHMS IN HETEROGENEOUS NETWORKS

Dzotsenidze G.V.  and Murjikneli G.G.

Georgian Technical University

The paper deals with the analysisof subscribers’ mobility procedure characteristics. There is offered an improved algorithm by which it is possible to make faster the mobility procedure between different radio access technologies, toreduce mobile device power consumption and to minimize congestion in the network.

Keywords: LTE, radiotechnology, WLAN, traffic, network

 

SUMMARY

IMPROMENT OF LTE NETWORKS PERFORMANCE USING MOBILE SMALL BASE STATIONS IN PUBLIC TRANSPORT

Dzotsenidze G.V. and Murjikneli G.G.

Georgian Technical University

The paper deals with a method for improving the performance of LTE networks, which is achieved by mobile small base stations deployment in public transport. Using the suggested method, it is possible to improve PEP and OP quality indicators, as well as to increase the coverage of the cell.

Keywords: base stations, performance, cell, LTE.

 

SUMMARY

BUCKLING OF THE BEAM UNDER UNEVEN THERMOMECHANICAL LOADING

Baisarova G.G. and Kikvidze O.G.

Sh. Esenov Caspian State University of Technologies and Engineering,  Aktau, Kazakhstan

Akaki Tsereteli State University, Kutaisi

The paper deals with the theoretical investigation of  beam resistance under thermomechanical load. The nonlinear differential equations of plane deformation and the differential equation of nonstationary heat conductivity are given. The problem of buckling of the cantilever beam is solved. The beam is loaded by a concentrated axial force at the free end and by an inhomogeneous temperature field. The results of numerical calculation are presented. 

Keywords: displacement, buckling, beam, thermomechanical load, concentrated force, inhomogeneous temperature field.

 

SUMMARY

PLASTIC DEFORMATION OF THE BUILT-UP LAYER ON A FLAT SURFACE

Kikvidze O.G., Bulekbaeva G.J. and Kipiani P.N.

Akaki Tsereteli State University, Kutaisi

Esenov Caspian State University of Technologies and Engineering,  Aktau, Kazakhstan

The paper deals with  the two-dimensional boundary problem of plastic deformation at rolling of the built-up layer. The  equation of  state of the  material is chosen on the basis of the creep theory. The main differential equations are presented and the corresponding boundary conditions are formulated.

Keywords: built-up layer,  plastic deformation, strain, velocity of strain, hardening theory, equation of state.

 

SUMMARY

APPLICATION OF PLASMA TO EFFICIENT COMBUSTION OF LOW-REACTIVE COAL DUST

Kevkhishvili N.A. and Javshanashvili N.B.

Georgian Technical University

The paper deals with the efficiency of application of the plasmatron to coal combustion. Thermochemical treatment of coal dust by using the plasmatronimplies heating of the air and coal mixture up to the temperature until the volatiles are released and partial gasification of the coke residue. Thus, from the low-reactive fuel derives highly reactive two-component one. There is suggested a solution of the problem associated with one of the major drawbacks of plasma technology related to their working resource.

Keywords: plasmatron, low-reactive coal, highly reactive coal, combustion.

 

SUMMARY

OPTIMIZATION  OF  THE PROCESS  OF THE MANGANESE ORE  BENEFICIATION PROCESS IN A DIAPHRAGM  JIG MACHINE

Enageli R.P., Gamtsemlidze M.N., Javakhishvili G.V., Arabidze Z.D., Tutberidze M.L., Rukhadze T.A. and  Tevzadze D.M.

Grigol Tsulukidze Mining Institute Georgian Technical University

The paper deals with the optimization of the process of manganese ore beneficiation in a diaphragm jig machine. Based on the conducted experiments, a mathematical model of the process was constructed and a technological criterion of optimization, which implies obtaining the maximum amount of concentrate of the desired quality taking into account control and disturbing actions, was determined. The optimization was carried out by a programming method using the graphical version. Based on the obtained results, the process optimal control system and optimal control laws, in which the variation of disturbing actions is considered, can be developed.

Keywords: manganese, jigging, concentrate, yield, control, optimization.

 

SUMMARY

NANOSCALE CATION-MODIFIED ZEOLITE MATERIALS

Dolaberidze N.M., Mirdzveli N.A. and Nizharadze M.O.

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

Based on natural Georgian clinoptilolite and phillipsite, sorbents with different content of zinc cations were produced by the ion-exchange method. It was found that the quality of replacement by zinc ions in phillipsite was higher than in clinoptilolite. This fact makes phillipsite modified with zinc ions the nanomaterial of choice for using in medical practice, as compared to clinoptilolite.

Keywords: clinoptilolite, phillipsite, ion exchange, cation, nanomaterial.

 

SUMMARY

CALCULATION OF WAVE MOTIONS OF THE BLACK SEA IN THE AREAS

OF POTI AND ANAKLIA

Saghinadze I.S. and  Pkhakadze M.D.

Akaki  Tsereteli  State University, Kutaisi

The paper deals with the two-dimensional mathematical model of wave motion of the Black Sea in Poti and Anaklià regions. The differential equations of wave motion of the sea which are solved by the finite difference method (the implicit scheme) were derived. For the numerical solution of the system of equations, the computer program Mathcad was used. As a result of the solution, the graphs of wave fields of the sea in Poti and Anaklia regions were obtained.

Keywords: coastal current, wave, velocity, sea, depth.

 

 

SUMMARY

SYSTEMS APPROACH AND MODELING IN GENERAL ECOLOGY

Andguladze Sh.N., Andguladze N.Sh. and Andguladze L.Sh.

Georgian Technical University

The paper deals with the formation of a systems approach to general ecology and some of its guidelines applied in ecology, such as integrity, structural properties, the system-environment dependence, hierarchy, multiple description of each system. The paper highlights the systems analysis, a set of methods as the grounds for the systems approach.

Keywords:ecology, modeling, systems approach.

 

SUMMARY

LIVING MATERIAL OF THE BIOSPHERE AND A LIVING BEING AS THE UNITY OF ITS PHYSICAL AND CHEMICAL PROPERTIES

Andguladze Sh.N., Andguladze N.Sh. and Andguladze L.Sh.

Georgian Technical University

The paper deals with the biogeochemical specific features of the living material, which, regardless of its diversity, is a single unit in terms of its physical and chemical properties having the same origin. The authors state that all the species react in about the same way to the specific physical or chemical influence, the quantitative aspect of their response being the sole difference. On the grounds of the aforesaid, they formulate the law of the integrity (unity) of the biosphere.

Keywords: biosphere, living being, biomass, gene.

 

SUMMARY

SPECIFICITY OF THE ACTION AND STRUCTURE OF SURFACE-ACTIVE SUBSTANCES

Berdzenishvili I.G.

Georgian Technical University

It is shown that the specificity of action of surface-active substances (SAS) is determined by the amphiphilic structure of their molecules. The valuable properties of SAS result from their ability of forming the surface-adsorbed layers at interphase interfaces. The action of anionic surfactant sodium dodecylsulfate bringing dirt particles into a soluble state is discussed.

Keywords: surface-active substances, amphiphilic structure, surface tension, sodium dodecyl sulfate.

 

Summary

Mathematic-chemical Investigation of Straight-Chained Alkanes within the Scope of THE Quasi-ANB-matrices Method

Karchkhadze M.G.,  Pirtskheliani  N.A. and  Gverdtsiteli M.I.

Iv. Javakhishvili Tbilisi State University

Sokhumi State University

Mathematic-chemical investigation of straight-chained alkanes was carried out within the scope of the quasi-ANB-matrices method. Two correlation equations of a structure-properties type were derived. One correlation is excellent, another – satisfactory.

Keywords: straight-chained alkanes, quasi-ANB-matrices, correlation equation.

 

 

SUMMARY

DETERMINATION OF THE FREE AMINO-ACID PROFILE BY MEANS OF HIGH PERFORMANCE LIQUID CHROMATOGRAPHY

Shatirishvili Sh.I., Berishvili L.A. and Shatirishvili I.Sh.

Georgian Technical University

The paper deals with the changes in the free amino-acid profile in the wines “Rkatsiteli” and “Kakheti” in relation to the duration of thermal heating and temperature variation. Main amino-acids, such as threonine, istidine+glutamine, alanine, arginine, methionine and proline, were determined. 

Keywords: liquid chromatography, derivatization, amino-acids, detector.

 

 

 

 

 

 

 

SUMMARY

PREVENTION OF OXIDATION DURING PRODUCTION OF WINE MATERIALS FROM TSOLIKAURI GRAPE CULTIVAR

Chkuaseli L.M., Geliashvili Z.E., Khomasuridze M.B. and Meskhidze M.Z.

Georgian Technical University

Oxidation causes various flaws and faults in wine. Moderate amounts of oxygen have a beneficial effect on wine, gives it complexity, whereas the excess of oxygen eventually deteriorates the quality of wine. White wine contains less amounts of phenolic compounds than red one, but the oxidation of phenolic acids, especially of hydroxycinnamic acid, catechols and quercetin, changes the color of wine into brown. For preventing the oxidation of wine, they must continuously control the content of oxygen in wine and use antioxidants allowed in oenology (ascorbic acid, sulfur dioxide, etc.). In the result of experimental investigation, the advantages of treatment of white wine with auxiliary materials Qi-No[Ox] and PVPP for prevention of oxidation were revealed. Application of antioxidant tannin preparation (VR Supra-Laffort)had an adverse impact on the wine color intensity and tone, the content of total phenols considerably increased as well.

Keywords: wine, oxidation, prevention, phenolic compounds, antioxidant.

 

SUMMARY

DEVELOPMENT OF THE METHODS OF EXTRACTION OF PHENOLIC COMPOUNDS FROM THE SEEDS OF GEORGIAN GRAPES FOR THE PRODUCTS FOR THERAPEUTIC AND PROPHILACTIC PURPOSES

Lobzhanidze G.A. and NamchevadzeT.V.

Akaki Tsereteli State University, Kutaisi

It is well known that one of the basic factors causing many diseases is the imbalance between oxidants and antioxidants in the organism. Hence it is essential to use antioxidants, natural antioxidants being preferable without doubt. The high antioxidant activity of grape polyphenols is well known. The outcomes of our investigation allow producing the nonalcoholic concentrates with grape polyphenols of nutritive-prophylactic purpose, which will contain no less than 200 mg/ml of the active substance in the diluted, bioavailable state. For comparison, it should be noted that the concentration of polyphenols in red wines is no more than 20 mg/ml.

Keywords: grape seeds, antioxidants, phenolic compounds, nanodispersion, extraction.

 

SUMMARY

THE IMPACT OF QUICK FREEZING ON THE MICLOFLORA OF BERRIES

Gurielidze M.A., Zhgenti M.S., Gulua L.K. and Turmanidze T.V.

Agricultural University of Georgia

The results of microbiological investigation of promising berry crops such as strawberries, raspberries and blackberries are discussed. Fresh berries, the berries after quick freezing and frozen berries after 2-month storage were studied. In the berries stored at – 18°C, just as the growth of yeasts, moldsand pathogenic bacteria (enterobacteria, staphilococcs etc.), so ofphytopathogenic fungi is inhibited, while the number of mesophilic, aerobic and facultative bacteria is reduced considerably.

Keywords: berries, quick freezing, microflora.

 

SUMMARY

RESPIRATION INTENSITY OF SOME STONE FRUITS DURING STORAGE

Zhgenti M.S., Gulua L.K. and Turmanidze T.V.

Agricultural University of Georgia

The dynamics of respiration intensity of promising peach, plum and nectarine cultivars, growing in Georgia, during storage was investigated. The cultivars withstanding long storage were identified, the loss during storage was assessed.

Keywords: stone fruit, storage, respiration intensity, climacterix.

 

SUMMARY

CHANGES IN SOME OXIDATIVE ENZYMES IN STONE FRUITS DURING STORAGE

Garuchava M.V., Gulua L.K., Zhgenti M.S. and Turmanidze T.V.

Agricultural University of Georgia

The activity of oxidative enzymes peroxidase and o-diphenoloxidase in peaches, plums and nectarines was studied. The dynamics of changes in these enzymes during storage of fresh fruit is discussed.

Keywords: peroxidase, o-diphenoloxidase, enzyme activity, stone fruit, storage.

 

 

 

 

 

 

SUMMARY

ANTICARCINOGENIC ACTIVITY OF THE COMPLEXES OF Cu2+ IONS WITH CLOTRIMAZOLE AS A RESULT OF FORMATION OF THE SPECIFIC COORDINATE STRUCTURE

Chigogidze N.Sh., Tsivtsivadze T.I., Nadiradze I.Sh., Kldiashvili R.S., Petriashvili J.D. and Japaridze R.J.

Scientific Center of Biologically Active Substances, Georgian Technical University

Coordinate compounds of bivalent copper with clotrimazole were synthesized, and their composition, structure and biological activity were studied. Preparation clotrimazole (bioligand) belongs to imidazole derivatives (heterocyclic compounds) which combine different kinds of biological activity: antimicrobial, antiprotozoal, antifungal etc. It is shown that, by the reaction of complex formation with 3d-metals, both mutual enhancement of these activities and the emergence of an essentially new anticancirogenic activity of a complex compound of copper with clotrimazole, better than that of cisplatin, are possible. Possible mechanisms of the anticancirogenic effect of such complexes are discussed. The concept of the role of the formation of the specific pentacoordinate structure of the complexes of Cu2+ with imidazole derivatives in the enhancement of cytotoxic activity of these preparations, we proposed, is confirmed.

Keywords: tumor, cell, inhibitor, chemotherapy, imidazole derivatives.

 

SUMMARY

TREATMENT OF ‘1 SKIN CANCERWITH 5-FLUORINE URACYL DEPOSITED ONTO A BIODEGRADABLE POLYMER: THE RESULTS OF LIMITED CLINICAL TESTING

Kublashvili N.G., Kutsiava N.A. and Katsarava R.D.

Georgian Technical University

The paper deals with the preparation 5-fluorine uracyl depositedonto a biodegradable polymer matrix for treatment of skin cancer.  The polymeric preparation is given a title Ftorocol. The preparation was used for both local and combined chemotherapy. In the process of testing, the advantages of application of the preparation to local chemotherapy over combined one were confirmed. Toxic manifestations of 5-fluorine uracyl were considerably less in the case of local therapy.

Keywords: 5-fluorine uracyl, biodegradable polymer, skin cancer, treatment.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                                    leri gvasalia - 80

saqarTvelos teqnikuri universi­tetis profesors, teqnikur mecnierebaTa  doqtors  baton leri  gvasalias 80 weli  Seusrulda.

leri gvasalia  daibada 1935  wels. q. quTaisSi. 1953 wels daam­Tavra              q. quTaisis pirveli saSualo skola da swavla gaagrZela  saqarTve­los teqnikur institutSi. 1958 wels daamTavra saqarT­velos teqnikuri institutis qimiuri teqnologiis fakulteti inJiner-teqno­logis kvali­fi­kaciiT. Tavisi SromiTi saqmianoba q. rusTavis qimiur  kombinatSi  daiwyo: iyo  ufrosi meaparate, cvlis ufrosi, saamqros ufrosis moadgile.

l. gvasaliam 1968 wels warmatebiT daicva sakandidato  disertacia da  mieniWa teqnikis mecnierebaTa kandidatis samecniero xarisxi, xolo 1993 wels ki sadoqtoro disertacia da mieniWa teqnikis mecnierebaTa doqtoris xarisxi.

1969 wlidan batoni leri saqarTvelos teqnikur institutSi moRvaweobs, ganvlo gza asistentidan qimiuri teqnologiebis kaTedris gamgemde. 

l. gvasalia aris 150-mde samecniero  naSromis, xuTi saxelmZRvanelos da erTi monografiis avtori. monawileobda mraval saerTaSoriso simpo­ziumebsa da konferenciebSi. dajildovebulia Rirsebis ordeniT.

batoni leri dResac aqtiurad eweva nayofier muSaobas rogorc pedagogi da axalgazrda Taobis aRmzrdeli. igi aris ara erTi sakandidato da sadoqtoro naSromis samecniero xelmZRvaneli. wlebis ganmavlobaSi xelmZRvanelobda qimiuri fakultetis  xarisxebis  mimniWebel sabWos.

CamoTvlili warmatebebi SeuZlebeli iqneboda batoni leris energiuli Sromisa da saqmisadmi  seriozuli damokidebulebis, siaxlisaken  ltolvisa  da rac mTavaria siyvarulis gareSe, ar SeiZleba ar gamovyoT baton leris pirovnuli Tvisebebi: TanamSromlebisa da kolege­bisadmi pativiscema, survili  daexmaros  nacnob Tu  ucnob  adamianebs  da  mudmivi mzadyofna pasuxismgeblobis Tavis Tavze aRebisa. gansakuTrebiT aRsaniSnavia  baton leris damokidebuleba da  urTierToba studentebTan.

batoni leri  mzrunveli mama, mosiyvarule babua da saimedo megobaria.

vusurvebT baton leris janmrTelobas, didxans sicocxlesa da  warmatebul SemoqmedebiT da SromiT saqmianobas.

 

 

                  

 saqarTvelos teqnikuri universiteti

saqarTvelos sainJinro akademia

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Nikoloz Bekauri  profesor  nikoloz  beqauri  - 100  

 

usazRvrod didia profesor nikoloz beqauris Rvawli qimiuri  mecnierebis,  qimiuri teqno­lo­giis, saqarTvelos navTobebis gadamu­Sa­­vebis  teq­no­­lo­giebisa da ganaTlebis  ganvi­Ta­rebis saq­meSi.  amaze metyvelebs mis mier gamoq­veynebuli saxelmZRvane­loe­bis, monogra­fie­bis, saavtoroebis, orasze meti statiis CamonaT­va­li   da  aTeuli wlebis man­Zil­ze  aRzr­di­li  qimikos-inJiner-teqnologTa simravle.

n. beqauris Sromebi exeba aramarto navTo­buri sawvavebis gakeTilSobilebas da oqtanuri ricxvis gazrdas alumin-silikaturi Tixa-miwebis  katali­za­to­rebad gamoyenebis safuZvelze, aramed navTobebidan sxva Zvirfasi produq­tebis - luminoforebis,  TeTri zeTebis da a.S. miRebis teqnologiebis Semu­Sa­vebas  da danergvas. 

batonma nikom saqarTvelos norios navTobidan miiRo qarTuli luminofori  „norioli“, romelic gamoiyeneba liTonebisa da plastikuri masebis safuZvelze damzadebuli detalebis defeqtoskopiaSi. mis saxelTanaa  dakavSirebuli arasasaqonlo daniSnulebis navT-gazoilis fraqciis katalizuri gardaqmniT  luminescenturi siTxis - „Subekoli“-is miReba, romelmac yofili sabWoTa kavSiris saxalxo meurneobis miRwevaTa gamofenaze sapatio jildo daimsaxura naklebi toqsikurobis, miRebisa da moxmarebis wesis simartivisa da siafis gamo.

udavod didia am praqtikosi mecnieris kvlevebi bunebrivi nedleulis gumbrinis gamoyenebasTan dakavSirebiT. man riformingis procesSi kata­lizatorad pirvelma gamoiyena gaaqtivebuli gumbrini  sanaTi navTisa da  navT-gazoilis fraqciidan reaqtiuli sawvavis misaRebad. batoni nikos mier  Seswavlilia naTeli fraqciebis gamosavlianobis gazrdis SesaZlebloba  sxvadasxva misarTis - soflis meurneobis Txevadi narCenebis da meoradi produqtebis  Tanaobisas  navTobebis  atmosferuli  gamoxdis procesSi.      

mniSvnelovania baton nikos Rvawli saqarTvelos navTobebidan saqarTvelos politeqnikuri institutis sapativcemulod  saxeldebuli mineraluri TeTri  zeTebis  „spiol-1“ da „spiol-2“ miRebasTan dakavSirebiT.  misi xelmZRva­ne­lo­biT ganxorcielda aRniSnuli produqciis mimRebi danadgaris montaJi baTumis  navTobgadamamuSavebel qarxnaSi.

nayofier samecniero moRvaweobasTan erTad batoni niko eweoda aqtiur pedagogiur da sazogadoebriv saqmianobas. wlebis manZilze xelmZRva­ne­lobda saqarTvelos politeqnikuri institutis organuli da navTobqimiuri teqno­logiis kaTedras, aqtiurad iyo Cabmuli  fakultetisa da mSobliuri umaRlesi skolis  samecniero sabWos muSaobaSi.  

batoni niko  siyvaruliT da pativiscemiT sargeblobda TanamSromlebs, kolegebsa da studentebs  Soris.   

batoni  nikos xsovna, rogorc amagdari aRmzrdelis da Rvawlmosili mec­nie­risa mudam iarsebebs misi aRzrdilebis, kolegebisa da axloblebis mexsiere­baSi. 

batoni nikos xsovnas Rirseul pativs miageben misi didi ojaxis wevrebi:  Svili - manana,  romelic dRemde batoni nikos mier dafuZnebuli mimarTulebis pedagogia, misi Svilebi  irakli  da  nikolozi da eqvsi SviliSvili, aseve SviliSvilebi - nikolozi da mixeili - udrood,  tragikulad  daRupuli  vaJis  -  vaxtangis  Svilebi.

batono niko, mdablad vxriT Tavs Tqveni xsovnis winaSe. 

 

                              saqarTvelos teqnikuri universiteti                             

qimiuri teqnologiis da metalurgiis fakulteti 

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