SUBJECT ENTRIES
A1. State and Law. Jurisprudence
À5. Informatics/Computer Science
À6.
Other Social Sciences
B1. Mathematics. Mechanics. Physics. Cybernetics
B4. Geography.
Cartography. Astronomy
B5. Other Natural and Exact Sciences
C. TECHNICAL
AND APPLIED SCIENCES. SECTORS OF ECONOMY
C2. Electrical Engineering. Electronics. Radio Engineering.
Communications
C3. Automation & Telemetry. Computer Engineering
C4. Mining. Metallurgy. Chemical Industry
C5. Mechanical Engineering. Instrument-making
C8. Construction. Architecture
C9. Agriculture and Forestry. Fishery
C10. Water Industry. Melioration
C11. Foreign and Domestic Trade. Tourism
D1. Organization and Management
D2. Environmental Protection. Ecology
D4. Other Intersectoral Problems
A1. State and Law. Jurisprudence
A1.1.
State policy towards ethnic minorities. /G.Maduashvili/. Intelektuali.
– 2008. – No.7. – pp. 51–55. – Geo. res.:
Geo, Eng, Rus.
The work discusses
the state policy towards ethnic minorities. For the sake of a comparative
analysis, the article deals with both the ongoing policy and the policy
implemented by the former authorities.
A1.2.
Execution of commands or orders as a circumstance excluding responsibility
under the Criminal Code of
The legislative and
practical characterization of the execution of commands or orders as the
circumstance excluding guilt. Recommendation in connection with the above.
A1.3.
Invalidity and insignificance of acts of local self–government agencies. /G.
Khunashvili/. Kommersanti. – 2007. – No.3
(4). – pp. 136–143. – Geo. res.:
Considered are such
important and problematic matters of administrative-legal acts issued by local
government as their invalidity and insignificance. In particular, the types of
administrative-legal acts are analyzed. Special attention is given to their
invalidation and to the peculiarities of insignificant administrative-legal
acts, also to the consequences of their application in the
administrative-legislative practice. Proposed has been a matter of the
necessity of recognizing an insignificant administrative non-act as invalid as
well of complete revocation of such acts.
À2.1.
The demographic policy of
The existing in
À2.2.
Strategic–conceptual positions of the state regulation of the demographic
policy. /J.Makharadze/.
Agrarian–economic Science and Technologies. – 2008. – No.1. –
pp. 111–116. – Geo. res.
On the basis of a critical analysis of the principal segments of the
factors determining the assessment of the demographic situation, the number of
Georgian population,
its gender status, and other demographic indicators, as well as a forecast for
2050 are presented. The strategic-conceptual positions of the state regulation
of economic and social processes of the population’s reproduction are proposed.
A3.1. Cell communication market in
According to available statistics, the Georgian
consumer spends almost 70% of his income on communication services. According
to an annual activity report by the Georgian National Communications
Commission, in 2007, the number of active subscribers of mobile communications
network increased by 895,000 and reached 2.6 million.
A3.2. Peculiarities of marketing
activity on the electronic market. /I.Gabadadze, A.Mushkudiani, S.Nemsadze, I.Tsereteli/. Novation. – 2008. – No.2. – pp. 94–98. – Geo.
res.: Geo,
The main seller
company groups on the electronic market, the principles of their activity, as well as the
buyer groups with their characteristic
peculiarities are highlighted. Productivity factors of the electronic business and the directions influencing
consumer values of the electronic marketing are
explained.
A3.3. Selection of alternative
investment protection methods. /G.Chikovani, R.Pataraia, L. Lagundaridze/. Building. – 2008. –
No.2 (9). – pp. 70–74. – Geo. res.: Geo,
Different investment
coverage models are reviewed – traditional, egalitarian and graduated, or
stepwise. Positive and negative aspects of their application are analyzed.
Comparative calculations revealing the advantage of a specific model in the
investment coverage process have been made by using these models. Periods of
time when an advantage is given to the calculations made under a specific model
which enable both the investor and the entrepreneur to take a mutually beneficial
decision have been identified.
A3.4. Small business features. /M.Mchedlishvili, E.Tatumadze, E.Mirotadze, K.Chincharashvili/. Building. – 2008. –
No.2 (9). – pp. 84–90. – Geo. res.: Geo,
Features of small and
medium businesses are discussed. An analysis of the strengths of a small
business over big companies is made. These strengths are: flexibility,
possibility of territorial maneuvering. Also discussed are the weaknesses of a
small business: funding difficulties; increased sensitivity to economic
changes; low level of specialization; shortage of export potential; personal
responsibility of the entrepreneur for his business. Notwithstanding its
negative aspect, small business has played an important role in the
implementation of many directions of the economic development, scientific and
technical advance worldwide. Consequently, one can presume that the development
of small business might become one of the important conditions for scientific
and technical advance in the economy of
A3.5. Poverty and the
main directions of its overcoming. /L.Chikava/. Economics and Business.
– 2008. – No.1. – pp. 77–88. – Geo. res.:
According to
international statistics, a “subsistence minimum” is the amount that is
necessary for meeting the daily vital needs. An individual who cannot afford
spending more than US$ 2/day on average shall be considered poor, while the one
who cannot spend more than US$1/day – extremely poor, or pauper. According to
the 2006 statistics, 16% (over a billion people) of the world population lived
below the extreme poverty line, and 23% - below the poverty line. The article
provides the statistics on the lowest-income countries. In the most of them,
the specific weight of the underfed population is characterized of a growing
trend. The causes of poverty and the main trends and measures of its overcoming
are given.
A3.6. Advantages and
disadvantages of a pension fund scheme in
The article deals
with the implementation of a pension fund scheme by the State for the
"waiting" category (old-age pensioners, sickness pensioners,
disability pensioners) by adhering to the legal principles of social and
economic succession. The inefficient pension fund scheme implemented in
À4.1. On some
questions of logic in studying mathematics.
/M.Deisadze, M.Nikoleishvili/. Novation. – 2008. – No. 2. – pp. 113–117. – Geo. res.: Geo,
A rather topical issue – the necessity of profound and
thorough learning of logical sums and mathematical rules, so that the future
teacher be able to form in a pupil already in elementary classes the general
mathematical skills, such as the ability of logical thinking – the ability of
seeing the essential, of generalization, of analyzing and synthesizing, of a
sequential decision-making, of a clear and sound thinking. Sound thinking does
not necessarily mean to be genuine. The soundness of thinking does not consist
in the reflection of the events of reality but in a succession of ideas, in the
sequential binding of ideas, in their interdependence, in the fact that the
ideas are not dependent on us, on our wishes and is not of a subjective nature.
In logical sums the proceeding of one idea from another is a necessity. The
article deals with the examples of denying syllogism, the rules. The objective
is that the pupil could develop the ability of sound thinking when solving the
logical sums and do not resort to own experience or knowledge relating to the
condition given in the task. The examples of true and false statements, of the
ability to negate and/or assert the statements, of the interrelationship of the
statements facilitate the development and formation in children of general
mathematical skills, logical thinking skills and, above all, the practical
implementation of the mathematical knowledge.
À4.2. A combined test method in parasitology. /M.Mandaria/. Novation. – 2008. – No.1. – pp. 65–68. – Geo. res.: Geo,
The
application of a combined test method assists in the conduct of an examination
in a short period of time and in the comprehensive assessment of knowledge,
provided the proper method has been chosen. Based on the specifics of the
Parasitology course, a combined test has been chosen to reveal the following:
1. (a) the student’s knowledge of the theoretical material; (b) the
student’s ability to solve the specific problem using his/her theoretical
knowledge. 2. how well the student knows the difficulty of pathogenic
action of each parasite. 3. how well the student knows the modern methods
of laboratory diagnostics. The test includes questions of different
complexity arranged in random order. The proposed method almost totally excludes
the attempts of the students to cram the right answers. The tests
comprehensively cover both the theoretical and practical course of
Parasitology.
À5. Informatics/Computer
Science
À5.1. Informatics, program technologies and modern
directions of their development and teaching. /G.Gogichaishvili,
A.Prangishvili, G.Surguladze/. Transactions, Automated Control Systems. – 2007. – No.1(2). – pp. 7–15. – Geo.
res.: Geo,
The questions
concerning the essence of informatics as a complex, interdisciplinary science,
the analysis of its structural components, the present status and development
trends are discussed. Fundamental program platforms and languages which are
widely applied at universities of the
À5.2. The forgotten quotations. /H.Wedekind/.
Transactions, Automated Control Systems. – 2007. – No.1(2). – pp. 16–22. – Geo.
res.: Geo,
Proposed are
the author’s experimental results (based on categorical analysis, relational
models and theory of logics) stating that an intricate, basic philosophical
terminology is best presented by adopting Wittgenstein’s aphoristic style.
According to Wittgenstein, it is shown how easily the purpose is achieved when
these terminological problems are solved. The word “forgotten“ fixes that
nothing is new in this paper and that almost all can be found in encyclopedias.
À5.3. Invariant
equations and inequalities for elementary Petri nets. /R.Wolfgang/. Transactions, Automated Control Systems. – 2007. – No.1(2). – pp. 23–31. –
The structure
and behaviour of elementary Petri nets can be presented in simple linear
algebra. They are described by means of vectors and matrices. At the same time,
a system of equations may be formed and the properties of the elementary Petri
net calculated. The work offers definite theoretical algorithms and practical
examples based on the invariant equations, inequalities and their combinations.
À5.4. Geometrical
modeling and graphic methods of the task solution. /V.Sesadze, G.Chikadze,V.Kekenadze, T.Kaishauri/. Transactions,
Automated Control Systems. – 2007. – No.1(2). – pp. 7–15. – Rus. res.: Rus,
The general
principles of applied geometry and geometrical modeling are formulated. The
method of geometrical modeling that reduces the environment research problem to
a mathematical task occupies the leading position among other methods of
research. The methods make it possible to solve complex problems of science and
technology, project new phenomena, plan new technology means operating in the
optimum modes. Geometrical models may be successfully applied in various fields
of science, in particular, in economic planning and the automated control
systems. All the above has preconditioned the development of a new direction
such as computer graphics.
À5.5. A new
algorithm to analyze the problem of a viscous streamline profile in the case of
a steady flow. /T.Obgadze, I.Davitashvili/. Transactions,
Automated Control Systems. – 2007. – No.1(2). – pp. 36–43. – Geo. res.: Geo,
An algorithm
based on the principal laws of mechanics and classical experiments is proposed.
Initially, the work deals with incompressible, viscous flows and then, by means
of the Christianovich recalculation experiments, moves to the aerodynamic
characteristics of a profile for compressible fluids. The work is based on the
application of a nonlinear programming method to minimize the integral error,
when the boundary conditions represent the law on conservation of mass and the
Bernoulli integral equation for viscous fluids. The pitch moment and the lift
ratio for the zero seat angle are calculated.
À5.6. On a question
of definition of equivalent-complex coefficient of nonlinear systems. /N.Mchedlishvili, T.Imedadze/. Transactions, Automated Control Systems. –
2007. – No.1(2). – pp. 44–47. –
Geo.
res.: Geo,
The work aims
at solving a problem of the certain class of analysis of nonlinear systems,
namely, the establishment of a link between two big groups of methods of
research: the method of harmonic balance and the functional description of
objects in time domain. The structure of the study systems is represented by
in-series linear dynamic and nonlinear static parts (models of Wiener and
Hammerstein) which are described by the Volterra’s series. The article presents
the algorithm of deriving a mathematical model of a wide class of nonlinear
dynamic systems as a complex gain. As a result of research, expressions for the
calculation of complex gains have been derived.
À5.7. On the method of determining the probability of solving a problem on multiprocessor computer systems in the presence
of float time. /Z.Jojua, N.Jojua, I.Mikadze/. Transactions,
Automated Control Systems. – 2007. – No.1(2). – pp. 48-52. – Rus. res.:
An analytical
model of determining the probability of problem solving on a multicomputer
system in the presence of a Poisson failure flow and float time for problem
solving is developed. The problem time is considered to be distributed in unit
functional form. The time of recovery of failed processors is considered. The
failed processor recovery time is allotted by the exponential law. The system
reconfiguration time is distributed by an arbitrary law. A function of the
probability of solving a problem in the given time is introduced and the proper
analytical expressions are compiled. After a series of transformations using
the Laplas–Stieltjes’ methods, a system of linear algebraic equations is
obtained, whose solution finally provides the problem solving probability
function in Laplacian form.
À5.8. Adaptive data
recording algorithms in automated control systems. /T.Macharadze/. Transactions, Automated Control Systems. – 2007. – No.1(2). – pp. 53–57. – Rus. res.: Geo, Eng, Rus.
The paper
deals with optimal algorithms that ensure in multi-channel systems the input
and registration of discrete data values given their spectral characteristics,
which significantly decreases the level of data to be processed.
À5.9. Committee
similarity measures. /T.Zhvania,
M.Kiknadze, M.Magradze/. Transactions, Automated Control Systems. – 2007. – No.1 (2). – pp. 58–64. – Geo. res.: Geo, Eng, Rus.
One of the
most widely known classes of algorithmic similarity measures are the so-called
committee similarity measures. The article deals with the formation of two
algorithms of the algorithmic and committee measures based on the available and
formed similarity measures which enables the practically error–free recognition
of the training sample realization.
À5.10. Public
opionion building mathematical model. /O.Shonia, G.Nareshelashvili/. Transactions, Automated Control Systems. –
2007. – No.1(2). – pp. 65–67. –
Geo. res.: Geo, Eng, Rus.
On the basis
of a public opinion probability analysis, a mathematical model of influencing a
public group has been developed. A provision on the possibility of building the
final general opinion in the group is justified.
À5.11. The
recognition reliability prediction on the basis of clustering results. /O.Verulava, T.Todua, L.Verulava/. Transactions, Automated Control
Systems. – 2007. – No.1(2). – pp. 68–72. –
Geo. res.: Geo, Eng, Rus.
A problem of
the recognition processes prediction on the basis of clustering results is
considered. In particular, a notion of a “pattern (cluster) influence” zone is
introduced. Considered are the cases when the influence zones do not intersect,
when they intersect and the non-compact clusters are considered as a special case of the latter.
À5.12. On the test
control problem formalization. /Z.Bosikashvili,
D.Kapanadze, T.Zhvania/. Transactions, Automated Control Systems. – 2007. – No.1(2). – pp. 73–77. – Geo. res.: Geo, Eng, Rus.
The issues of
building formal automatic test control models are considered. The general task
of the automatic generation of control tests for various subject areas allowing
the development of automated test control systems based on the single formalism
has been set.
À5.13. Network control
process algorithms. /G.Janelidze,
B.Meparishvili, T.Meparishvili/. Transactions, Automated Control Systems. – 2007. – No.1(2).
– pp. 78–81. – Geo. res.: Geo, Eng, Rus.
Discussed are the problems of effective flow control
in a network with complicated topology, representing generally the
decision-making in a specific situation. In order to solve the set problem,
artificial intelligence as a high-level method is proposed. Proceeding from
specifics of the object, the joint application of artificial neural networks,
systems of frames and genetic algorithms is rather expedient. For this purpose,
the article proposes a generalized network control algorithm where the basic
functional blocks are intellectual monitoring and control algorithms on the
basis of databases as well as knowledge bases, frame model of knowledge and a
logical machine.
À5.14. Simulation of
realization mechanisms in object–oriented design. /T.Sukhiashvili/. Transactions, Automated Control
Systems. – 2007. – No.1(2). – pp. 82–85. – Geo. res.: Geo, Eng, Rus.
Most automated systems are characterized of
evolutionary development conditioned by the internal self–organization and
perfection. The system requirement changes ask for the respective changes in
the design. The article discusses simulation and identification of the
requirement realization mechanisms, with an allowance for correction of the
model. For this purpose, the mechanism of realization is presented as a
conceptual fragment which, while defining the requirement semantics, can be
disclosed and examined for the presence of concealed structural and behavioral
details.
À5.15. On the capability maturity model. /L.Bezhanishvili/. Transactions,
Automated Control Systems. – 2007. – No.1(2).
– pp. 86–91. – Geo. res.: Geo,
Eng, Rus.
Users’ claims to the quality of
software have brought to the investigations forefront the software quality
assurance. The quality of a developed system was announced as its property and
was expected to be planned and controllable. The product quality was found to
be in direct relation to the quality of processes used for its making. The
understanding of this fact has become fundamental in developing the CMM/CMMI
model designated for the maturity estimation of the main groups of development
processes. In
À5.16. Database
design for conference organizers. /N.Topuria/. Transactions,
Automated Control Systems. – 2007. – No. 1(2). – pp. 92–95. – Geo. res.: Geo, Eng, Rus.
A
computer-aided database design for conference organizers is discussed. The
design of a conceptual model is carried out by means of the ORM diagram and
corresponding ER model. The theoretical and instrumental means od the
structural and semantic specification of the ORM/ER diagrams are shown.
À5.17. Design of
corporate information systems. /L.Petriashvili,
M.Okhanashvili/. Transactions, Automated Control Systems. – 2007. – No.1 (2). – pp. 96–99. – Geo. res.: Geo, Eng, Rus.
The
multivariate data models and the main principles of their use are considered.
They occupy a special place in the full-value data analysis. The online
analytical processing (OLAP) technology allows not only to obtain the
statistics on the enterprise activity but also to search for regularities
therein, to see the trends of various processes, and to make forecasts. In
other words, OLAP provides the analysts and the enterprise administration with
the necessary material for the effective managerial decision-making.
À5.18. Organization
of program servers in corporate networks. /W.Reisig, G.Surguladze, D.Gulua/. Transactions, Automated Control
Systems. – 2007. – No.1(2). – pp. 100–104. –
Geo. res.: Geo, Eng, Rus.
The
client–server architecture of corporate networks, the server–farm
(terminal–server) of which ensures management of the user working sessions and
uniform distribution access of clients to physical servers is considered. As
for the task of a cluster (file–server), it consists in the reliable storage of
public resources (virtual IP–addresses and network names, joint programs and
services, distributed catalogues, etc.) and in the organization of access to
external memory (e.g. an array of SAN–disks).
À5.19. Automated
design of distributed databases in .NET environment. /G.Surguladze, N.Topuria, L.Kvavadze, I.Vacharadze/. Transactions,
Automated Control Systems. – 2007. – No.1(2). – pp. 105–108. – Geo. res.: Geo, Eng, Rus.
The problems
of design and realization of relational databases for the distributed systems
of organizational management on the basis of modern information technology
(.NET, UML) are discussed. The concept of using a reverser in the problems of
support of intercompatibility of ORM/ERM models and DDL–language is proposed.
The results of experiments are adapted in the MsSQL Server and ADO.NET
environment.
À5.20. Design concept of a computer system "University" for examination and
evaluation of knowledge. /G.Ghvinepadze/. Transactions,
Automated Control Systems. – 2007. – No.1(2). – pp. 109–110. – Geo. res.: Geo, Eng, Rus.
For the
purpose of improving the quality of training at higher educational
institutions, the creation of a computer system "university" is
proposed, the basic function of which will consist in the evaluation of
knowledge of students by the automation of half-year examinations. To simplify
the processes of development and introduction of the system, their
stage-by-stage implementation would be desirable.
À5.21. A reduction
algorithm to ensure relational completeness of database languages. /A.Kobiashvili, E.Gvaramia/. Transactions, Automated Control Systems. –
2007. – No.1(2). – pp. 111–114. –
Geo. res.: Geo, Eng, Rus.
A reduction
algorithm allowing for reduction of an arbitrary expression of the relational
calculus to a semantically equivalent expression of the relational algebra is
proposed. An example illustrating this algorithm is presented and the advantage
of the algorithm is shown.
À5.22. Modeling of
workplaces in the design of distributed control systems. /T.Sukhiashvili/. Transactions, Automated Control Systems. – 2007. – No.1(2). – pp. 115–117. – Geo. res.: Geo, Eng, Rus.
In the design
of distributed control systems, matters a correct definition and modeling of
workplaces and actor–performed operations. The article discusses a means of
defining the actor roles on the basis of precedent analysis and of the work
processes carried out thereby by means of activity diagrams.
À5.23. Algorithm of the accelerated calculation of the number of up states of
complex systems. /R.Samkharadze,
M.Kalabegishvili/. Transactions, Automated Control Systems. – 007. – No.1(2). – pp. 125–128. – Geo. res.: Geo, Eng, Rus.
Proposed is an algorithm of the
accelerated calculation of the number of up states of complex systems,
consisting in the following: a mask representing a minimum quantity of
efficient, serviceable conditional elements of reliability is formed; the mask
is divided into groups, wherein the generation and exhaustive search of
necessary variants are carried out.
À5.24. Definition of
interrelations between basic characteristics of a computer network. /N.Lolashvili, M.Tevdoradze/. Transactions, Automated Control Systems. –
2007. – No.1(2). – pp. 129–134.
– Rus. res.: Geo, Eng, Rus.
A series of
technical and economic characteristics of computer networks are considered and
the basic ones are outlined, such as the reliability, topology, cost and time
parameters. The interrelation and interdependence between them is established.
In addition, the complex parameter of the computer network efficiency is
introduced.
À5.25. Determination
of the quality of service of distributed multimedia systems. /N.Bibiluri, M.Tevdoradze, E.Umudumiadis, K.Kordzakhia/. Transactions,
Automated Control Systems. – 2007. – No.1 (2). – pp. 135–140. – Rus. res.: Geo, Eng, Rus.
The problem of
the quality of service of distributed multimedia systems is discussed. The
service quality is shown to depend on many factors, the principal being the
characteristics of the multimedia system components. The article individually
discusses these characteristics and cites their distinctions from the
characteristics of the traditional system components. A processing scenario QoS
of the multimedia system has been worked out.
À5.26. Analysis of
the quality of service characteristics of data communications networks. /L.Mirtskhulava., M.Kiknadze/. Transactions, Automated Control Systems. –
2007. – No.1(2). – pp. 141–143. –
Geo. res.: Geo, Eng, Rus.
The article
describes the "best effort" delivery model of data communications
networks that offers a point–to–point delivery service and provides for the
quality of service with the shortest delivery time, but with no commitment as
to bandwidth or latency.
À5.27. Problems of
automatic error detection and reliability increase of the measuring information
in automated systems. /N.Kunelashvili,
N.Eremeishvili, M.Kiknadze/. Transactions, Automated Control Systems. – 2007. – No.1(2). – pp. 144–147. –Rus. res.: Geo, Eng, Rus.
The pressing
questions of the error detection of the measuring information in audit systems
are considered. The basic requirement is the reliability of audit results. A
built-in control of catastrophic and degradation refusals is provided for. The
proposed method of the reliability increase of the measuring information
considerably improves characteristics of the audit system.
À5.28. Structural
analysis of automated management for industrial projects. /O.Gabedava/. Transactions, Automated Control Systems. – 2007. – No.1(2). – pp. 148–150. – Geo. res.: Geo, Eng, Rus.
Descriptions
of the control constructs of an automated control system of industrial projects
are given, which ensure the reliability, integrity, flexibility and
profitability of subcontrols.
À5.29. Netwok data
security concept. /O.Shonia, D.Shonia,
I.Gogokhia, N.Poladashvili/. Transactions, Automated Control Systems. – 2007. – No.1(2). – pp. 151–154. – Geo. res.: Geo, Eng, Rus.
A detailed
analysis of computer crimes is given and the issues of struggle against them
are considered. The problems of information security for information systems
are discussed and the general informational safety concept in such networks has
been established.
À5.30. Security of
information systems. /O.Shonia,
T.Sherozia, D.Shonia, N.Tsomaia/. Transactions, Automated Control Systems. –
2007. – No.1(2). – pp. 154–156. –
Geo. res.: Geo, Eng, Rus.
The problems
of secure operation of information systems are analyzed. The main directions of
overcoming these problems are considered, taking into account the user demands.
À5.31. Emergencies
control and liquidation system. /O.Shonia,
K.Odisharia, N.Poladashvili/. Transactions, Automated Control Systems. – 2007. – No.1(2). – pp. 156–159. – Geo. res.: Geo, Eng, Rus.
The work deals
with the necessity of creation in the country of a system to control emergency
situations resulting from natural disasters and man-made activity. A concept of
the setting up and operation of the system has been worked out.
À5.32. Fractal
coding of images under distortion of the communicated data. /N.Kharatishvili, I.Chkheidze, V.Steperman/. Transactions, Automated
Control Systems. – 2007. – No.1(2). – pp. 160–163. – Rus. res.: Geo, Eng,
Rus.
The effects of
distortions on the communicated information in using the fractal compression
method when coding images are considered. The decoding is found to be more
sensitive to the errors in the domain number than to the distortions in the
transformation index. It is, therefore, recommended that the method of error
detection and correction be used for the domain number transfer and for
upgrading thus the quality of restored images.
À5.33. Fiber–optic
telecommunication network of an electric power system. /I.Modebadze, G.Murjikneli, N.Modebadze, N.Eremeishvili, E.Popkhadze/. Transactions,
Automated Control Systems. – 2007. – No.1(2). – pp. 164–169. – Geo. res.: Geo, Eng, Rus.
The questions
of design of a fiber–optic telecommunication network of an electric power
system for the purpose of increase of the reliability and quality of communication
between power objects are considered. In particular, it is recommended to have
in the system of power industry both own and leased telecommunication channels.
An opportunity of reducing the cost of the system by suspension of an optical
fiber on a high-voltage line is discussed. The advantages of fiber–optic
communication over other communication systems as well as the dependences of
its attenuation upon the length of a wave and the distances of a beam
distribution without preliminary strengthening from the communication speed are
given. The parameters of the optic fiber and fiber-optic cables of different
kinds are considered and the methods of their suspension on high-voltage
transmission lines are demonstrated.
À5.34. Making of
diagnosis in the expert system of disgnostics of dental diseases. /G.Gogichaishvili, S.Manukov/. Transactions, Automated Control Systems. –
2007. – No.1(2). – pp. 170–176.
– Rus. res.: Geo, Eng, Rus.
The method of
making diagnostic decisions in an expert diagnostic system of dental diseases
is considered. The methods of a formalized presentation of the symptomatic
facts and generation of diagnostic decisions with the aid of an algebraic
system-type model are given. A significant reduction of searching for possible
decision options is carried out by using the mechanisms of generalization and
semantic tolerance of fragments.
À5.35. Discussion on
the generation of information in problems of optimum water allocation. /E.Asabashvili, M.Vartanov, Z.Tsveraidze/. Transactions, Automated
Control Systems. – 2007. – No.1(2). – pp. 177–180. – Geo. res.: Geo, Eng, Rus.
The
economically optimum allocation of deficient water resources in the
amelioration systems can be carried out only by means of a feedback information
management system. Consequently, before making managerial decisions on the
allocation of water resources, the management center should receive information
on the amount of water required by each subsystem. Concurrently, the
information on the losses, or the economic effect that may be obtained by each
water consumer in the case of different quantity of water allocated thereto.
À5.36.
Medico–sociological database on elederly Georgian citizens. /K.Kachiashvili, B.Meparishvili/. Transactions, Automated Control
Systems. – 2007. – No.1(2). – pp. 181–183. –
Geo. res.: Geo, Eng, Rus.
A gerontology
database created by the authors within the MsAccess program environment is
proposed. It is designated for compact storage of gerontology information in a
computer for the purpose of an operative and convenient retrieval of any part
thereof for the follow-up processing by modern mathematical methods and service
facilities. The following tasks were solved to generate the database: The data
organization in the memory and their management; the information search and its
correction where necessary; the selection of data with the indicated criterion;
the creation of the forms and reports; the elaboration of special macros; the
creation of graphs and dialogs; the representation of the information in the
needed forms.
À5.37. A systems
approach to early diagnostics of the organism pathology. /B.Meparishvili, G.Janelidze, T.Meparishvili/. Transactions, Automated
Control Systems. – 2007. – No.1(2). – pp. 184–188. – Geo. res.: Geo, Eng, Rus.
The necessity
of design and introduction of a medical expert system for early diagnostics and
treatment of high-risk systemic diseases is considered, in particularly, of a
general monitoring diagnostic system of an organism for determining the a
pathological segment, as well as and the degree of the pathology itself. The
solution of the problem consists in the determination of the values of the
coefficients of the organism’s graphic model elements, when the value of the
resultant vector of the model is adequate to the actual anamnesis of the
patient. The problem may be successfully solved using genetic algorithms. The
presented concept of the systemic monitoring may become the basis of a new
paradigm – systemic medicine, as an area of systems modeling, many-sided
investigations and imitational experimentations of the human organism.
À5.38. Åstimation of shock interaction forces by the catastrophe theory method. /V.Sesadze, V.Kekenadze, G.Chikadze, T.Kaishauri, N.Pailodze/. Transactions,
Automated Control Systems. – 2007. – No. 1(2). – pp. 189–192. – Geo. res.: Geo, Eng, Rus.
The questions
of estimation of the shock interaction forces of the arbor with a rod in the
deformation center of the automatic tube mills using the method of R.Thom’s
catastrophe theory are considered. For the purpose of determining the maximum
tensions arising in the automatic mills’ cores, the effects of forces of shock
interaction determined by the offered technique should be taken into account.
R.Adamia’s interaction model, considering the peculiarity of the shock process
in tube–rolling on automatic mills, is used for the analysis. Practical
calculations of shock interaction forces made under the given methods
demonstrate that we are dealing with a crease-type catastrophe.
À5.39. A multimedia
training program in optimal control systems. /I.Mosashvili, V.Sesadze, N.Maglakelidze/. Transactions, Automated
Control Systems. – 2007. – No.1(2). – pp. 193–196. –
The making of
electronic manuals is one of the most promising trends in use of computer
technologies in the training process. The multimedia approach is being used in
teaching the course “Theory of Optimal Control”. It helps the student to
represent the optimal control problem and to resolve it in different ways. The
student’s self-training on the majority of technical subject shall be possible
only with the aid of printed material (books, manuals, periodicals), which
requires increased concentration of attention and consumes much time. An
electronic training aid in the form of interactive multimedia training
programs, which includes hypertext, illustrations, video and audio fragments,
combine in itself a pictorial representation of the material and communication
with the trainee.
À5.40. Description
of a functional structure of a farm control system for designing a
computer-aided crop forecast system. /S.Pochovian/. Transactions, Automated Control Systems. – 2007. – No.1(2). – pp. 197–199. – Rus. res.: Geo, Eng, Rus.
The
description of the main functions and solved problems during operation of a
farm management system for designing a computer-aided crop forecast system is
given.
À5.41. Electric
power distribution method using the “golden section” proportion. /G.Macharashvili/. Transactions, Automated Control Systems. – 2007. – No.1(2). – pp. 200–203. – Geo. res.: Geo, Eng, Rus.
The “golden
proportion” guarantees the sustainability and harmony between elements of a
system in the area of technology, economy, architecture, painting and public
sphere, i.e. the state corresponding to the “golden section” rule. This
proportion implies the division of the system into two unequal parts, in the
following proportion: 1=0,618+0,382. The “golden section” proportion has been
used for the first time for purposes of electric power distribution among the
consumers. For that purpose an analysis of power distribution in the Georgian
grid for 1990, when the situation in the power industry was more or lass
stable, has been carried out. This year, the electric power has been
distributed according to the “golden section” rule.
À5.42.
Computer-aided etymologizing. /G.Gvinepadze/.
Transactions, Automated Control Systems. – 2007. – No.1(2). – pp. 204–206. – Geo. res.: Geo, Eng, Rus.
Etymologizing
is the most complex linguistic task. It is especially complicated for
“primordial” terms. Many unsuccessful attempts to etymologize such terms have
made many scientists reject the idea referring to their being the so-called
“unmotivated” words. As a result of our research, we have found the concept
WATER to be the root word for the prime vocabulary. Based on this supposition,
a series of Georgian words, being considered “hopeless” in this sense, have
been etymologized. It is, however, evident that for further progress of the
investigation, a serious computer support is necessary. We propose a concept of
computer-aided etymologizing. The program will estimate the potential of
etymological linkage between pairs of consonant words, the final estimate being
made by experts.
À5.43 Design of
data warehouse for decision support system after the example of a commercial
bank. /I.Vacharadze/. Transactions, Automated Control
Systems. – 2007. – No.1(2). – pp. 207–210. –
Geo. res.: Geo, Eng, Rus.
Modern
software UML technologies make possible to automate design of automated control
systems and to essentially reduce the time and costs of the system making, to
create conditions for producing standard packages, using modern programming
languages (C#, C++, VB, JAVA). The work, after the example of a commercial
bank, considers the making of a data warehouse and the design of fragments of
the software system diagrams.
À5.44. Design of a
computer-based electric “technical loss” control system on the basis of
ORM/ERM. /G.Surguladze, N.Topuria, G.Bakhia/. Transactions,
Automated Control Systems. – 2007. – No.1(2). – pp. 211–214. – Geo. res.: Geo, Eng, Rus.
A description
of an automated design of databases for the personnel engaged in the power
engineering sector, aimed at reducing “technical losses” in this sphere is
presented. The design of a conceptual model is performed on the basis of the
ORM diagram and corresponding ER model. The software of the user interfaces has
been executed by means of ASP.NET
À5.45. Design of a
simulation model of marketing processes on the basis of agent modeling. /M.Okhanashvili, L.Petriashvili/. Transactions, Automated Control
Systems. – 2007. – No.1(2). – pp. 215–218. –
Geo. res.: Geo, Eng, Rus.
The efficiency
of application of simulation modeling for marketing processes is discussed,
also the agent modeling not as a substitution of traditional approaches but as
a useful supplement to system dynamics and discrete–stochastic modeling. A
simple customer service system and the corresponding agent model are
considered.
À5.46. A new
approach to the technology of design of Internet-based data retrieval systems
(after the example of www.e–info.ge). /T.Dolidze/. Transactions, Automated Control Systems. – 2007. – No.1(2). – pp. 219–222. – Geo. res.: Geo, Eng, Rus.
A new approach
to the design technology of Internet-based data retrieval systems is proposed
enabling the user not only to get the address and product or service data
searched but also to make a pilot analysis and assessment of the information.
À5.47. Virtual
marketing modeling and distributor workstation. /M.Kashibadze/. Transactions, Automated Control Systems. – 2007. – No.1(2). – pp. 223–226. – Geo. res.: Geo, Eng, Rus.
The setting
and solution of a problem of design of a distributor workstation in a network
of virtual marketing on the basis of operative orders of would-be customers and
an actual database of products from the corresponding trade catalogue are
proposed. On the basis of the UML and Petri networks, the simulation system
models and algorithms are designed.
À5.48. Integrated
data analysis. /L.Petriashvili, M.Îkhanashvili, Sh.Akhalaia/. Transactions, Automated Control Systems. –
2007. – No.1(2). – pp. 227–230. –
Geo. res.: Geo, Eng, Rus.
The
development of ERP–systems, a role of the data warehouses in the information
ERP–architecture and the prospects of design of the integrated media using the
opportunities of these two technologies are considered. In addition, the
estimation of achievements of two largest firms (SAP and People Soft),
producers of the ERP–systems in the data warehouses and analytical applications
development area.
B1. Mathematics. Mechanics. Physics.
Cybernetics
B1.1.
Analysis of dynamic effects in the piercing mill train with regard for joint gaps
in its elements. /R.Adamia, S.Mebonia, T.Natriashvili/. Novation. – 2008. – No.2. –
pp. 7–13. – Rus. res.: Geo,
Stages of the
piercing mill train movement from the moment of switching on of the mill motor
until the steady motion of the system given the gradual gaps locking in the
main train elements are considered. The amplification factor values of the
train are determined and the optimal region of the piercing mills TÏA
140 and 400, preventing inner resonance in the homer system of piercing mills
is established.
B1.2.
Optimization of the control system with the asynchronous electromechanical
drive with the elastic linkage. /R.Adamia, N.Beradze, I.Dochviri/. Novation. – 2008. – No.2. – pp. 14–20. – Eng. res.: Geo,
The
problems of optimization of transients of a drive with a feedback in the
presence of digital control are considered. The optimum transfer functions and
parameters are determined with the help of the so-called Bode diagrams. The
work gives transfer functions with discrete operators both for open and closed
loops. Using them, the optimized transient curves of the motor speed are
constructed.
B1.3. Application of the principle of operation of
accelerometer in non-conventional vibroimpact carriers. /Ts.Beradze, M.Tevzadze, D.Khuskivadze, N.Lomidze/. Novation. – 2008. – No.2. – pp. 21–27. – Geo. res.: Geo, Eng, Rus.
In a number of
branches of national economy one of the effective means of radical improvement
of traditional technological and working processes, in particular,
increases of productivity and qualitative indicators, is the purposeful
use of vibration in these processes. Vibration machines make it possible to perform a whole set of technological
operations, the performance of which is generally impossible by means
of traditional carriers. Since the accelerometer operation scheme has served as
a basis for making a non-conventional vibroimpact carrier, the article
presents the principle of its use. If a car is given the possibility of rolling with the produced acceleration and the disturbance pulse action
assumes a continuous character, then the car will move with the desirable
speed. To explain the rolling principle of a non-conventional
vibroimpact carrier, the movement of cargo on a rough surface is considered.
To produce the car rolling, it was necessary that the car wheel rolling
in the vibrator shock direction would be free, whereas to ensure the same in
the opposite direction, a free-wheeling clutch was used. A primitive scheme is considered and the sequence in which the
phase trajectory is constructed is shown.
B1.4. Strictly increasing and strictly decreasing
variate function. /K.Shvangiradze,
D.Porchkhidze/. Novation. – 2008. – No.2. –
pp. 28–32. – Geo. res.: Geo, Eng, Rus.
The development of a
variate function density formula is given. It is shown that if 
function is strictly
increasing and continuously differentiated, it will have an inverse function
with continuous derivate,
and if function is strictly
decreasing, the derivative of the inverse to it function
, consequently 
and equality 
will be valid in both
cases. A connection between probability distribution density 
and 
is established. The
equality is valid for intervals
of possible values of variates
and
, out of the intervals 
and
. It is shown that if function is
piecewise strictly monotonous into the intervals of possible values of the
variate , this interval can be divided into n-partial
intervals, in which every function is strictly monotonous
and densities 
can be respectively
found in each of these partial intervals according to the formula.
B1.5. Pauli matrices
and the theory of spatial rotations. /R.Adamia,
A. Milnikov/. Novation. – 2008. – No.1.
– pp. 7–12. – Eng
res.: Geo,
It is
shown that Pauli Matrixes can be derived from irreducible rotation group
representations of the weight 
, which in turn based on the theory of infinitesimal
(elementary) spatial rotations. The last permits to substantiate why Pauli
matrixes can be so sufficiently used for modeling of physical rotations.
B2.1. Influence of ammonium nitrate introduction on glutamate dehydrogenase and glutamine synthetase activities and protein content in roots and leaves of maize. /I.Lomsianidze, T.Mitaishvili,
M.Betsiashvili, V.Vashakmadze, N.Kuprava/. Proceedings of the
Activities
of the enzymes participating in ammonia assimilation – glutamine synthetase and
glutamate dehydrogenase were studied in roots and leaves of maize against the
background of fertilizing soil with rising doses of ammonium nitrate. The
activity of enzymes as well as protein content changed in roots and leaves
according to the doses of introduced ammonium nitrate.
B2.2. DNA
microsatellite analysis of cultivated and wild Georgian grapes. /M.Gamkrelidze/. Proceedings of
the
DNA
microsatellite analysis of cultivated and wild Georgian grapes were studied.
Seven Georgian cultivars: Rkatsiteli, Saperavi, Tavkveri, Goruli Mtsvane,
Aleksandrouli, Chkhaveri and Ojaleshi were genotyped at six (VVS2, VVMD5,
VVMD7, VVMD27, ssrVrZAG62, and ssrVrZAG79) polymorphic microsatellite loci and
seven specimens of wild grape from different geographic zones of Georgia and
one from Turkey were analyzed at four polymorphic microsatellite loci (VVMD7,
VVMD27, VVS2, ZAG62). Plylogenetic tree of Georgian cultivars was constructed.
Microsatellite analysis revealed high level of polymorphism among investigated
cultivated and wild grapes detecting at the same time their individual, unique
allelic profile. Extent of genetic polymorphism in wild accessions is slightly
higher from that observed in cultural varieties.
B2.3. Novel plant
composites as antioxidant food additives. /L.Gulua, N.Omiadze, N.Mchedlishvili,
M.Abutidze, G.Tsiklauri, K.Jibladze/. Proceedings of the
Content
of polyphenols and soluble pectin in different fruits and vegetables as well as
in green tea extract was determined. Two novel antioxidant composites from
plant extracts were proposed as antioxidant food additives. One composite
consisted of green tea extract and red wine lees, another composite included
lemon peels extract in addition. The composite from green tea extract and red
wine lees showed by 30% more antioxidant activity than the other composite.
B2.4. Invasion of centaurea solstitialis l. in steppe
vegetation of
The paper presents the results of a research on invasion
specificities of a weed Centaurea
solstitialis L. in steppe vegetation (Bothriochloeta; B. ischaemum and Festuceta; F.
valesiaca) of
B2.5. Morphogenesis and reproduction biology of Muscari alpanicum Schchian. /N.Melia,
L.Gabedava, T.Barblishvili, L Zghenti/.
Proceedings of the Georgian Academy of Sciences. – 2008. – vol. 6 – No.3–4. – pp. 25–29. – Eng. res.: Geo, Eng.
The structural aspects of reproduction
biology, seed production processes and germination capacity have been studied
in Muscari alpanicum Schchian – plant
endemic to
B2.6. Ex–situ conservation of
some economically important relict plant species distributed in
The
paper presents the distribution ranges of economically important relict plant
species: Gymnospermium smirnowii (Trautv.)
Takht. (Berberidaceae); Hibiscus ponticus
Rupr. (Malvaceae); Kosteletzkya
pentacarpa (L.) Ledeb (Malvaceae); Paeonia
steveniana Kem.–Nath. (Paeoniaceae); Pancratium
maritimum L. (Amaryllidaceae) and Trapa
colchica Albov (Trapaceae) within the
B2.7. Microflora of some soil
types in Samegrelo region. /I.Buliskeria,
Z.Lomtatidze/. Proceedings of the
The
general number and peculiarities of distribution of separate groups of
microorganisms in alluvial calcareous, alluvial–saturated, alluvial–acid and
subtropical grey soils of the Samegrelo region have been studied. It has been
established that according to the number of microorganisms, alluvial calcareous
soil type has the highest index (822.3x105), while their number in the
alluvial–saturated, alluvial–acid and subtropical grey soils are comparatively
small – 606.0x105, 218.0x105, 480.0x105 cells, respectively (per 1 g of dry
soil). The distribution of actinomycete–antagonists was also investigated in
those soils.
B2.8. The potential of
2,4,6–trinitrotoluene application by bacteria as the sole source of carbon and
nitrogen. /N.Gagelidze, L.Amiranashvili,
Kh.Varsimashvili, L.Tinikashvili, L.Zuroshvili, E.Kirtadze/. Proceedings
of the
To
reveal the potential of 2,4,6–trinitrotoluene (TNT) application as the sole
source of carbon and nitrogen, 40 bacteria isolated from contaminated soils of
Georgia and 12 strains of genera Rhodococcus
and Mycobacterium kept in the
collection of microorganisms at Durmishidze Institute of Biochemistry and Biotechnology
have been investigated. All tested strains grew better on TNT–containing media
in the presence of rapidly assimilated sources of carbon and nitrogen. Some of
them grew better on TNT–containing nutrient media in the presence of carbon
sources and others – in the presence of nitrogen sources. The growth
intensities of all strains were suppressed when TNT was used as the sole source
of both elements. At deep cultivation the utilization of TNT in case of Pseudomonas sp.44 and Rhodococcus sp. VCM Ac 1170 str.44 was
most intensive on complete nutrient media (89% and 67%, respectively); however,
the process also occurred in the media, in which TNT was the sole source of
carbon and nitrogen. In these variants the amount of residual TNT was 33–42%.
B2.9. The microorganisms
participating in oligocarbophylic and humus mineralization of Shida Kartli
soils. /I.Gorozia, Z.Lomtatidze, N.Kotia, I.Buliskeria.,
N.Lomtatidze/. Proceedings of the
The
quantitative and qualitative content of the microorganisms participating in
oligocarbophylic and humus mineralization of different soil types in Shida
Kartli have been determined. It has been established that the samples of the
given soils are distinguished by the amount of investigated microorganisms. The
cannimonic calcareous soil type is rich in oligocarbophyle microorganisms (the
amount of microorganisms – 574x103±1%), relatively poor are cinnamonic leached,
alluvial–calcareous and meadow cinnamonic soil types (the amount of
microorganisms – 52x103±1%, 69x103±1% and 67x103±1%, respectively). It has been
also established that the microorganisms of Nocardia
family dominate.
B2.10. Screening of extremophilic
actinomycetes – destructors of hydrocarbons and pesticide
2,4–dichlorophenoxyacetic acid. /M.Gurielidze,
T.Berishvili, N.Cholokava, D.Pataraya, N.Nutsubidze/. Proceedings of the
Detoxification
capability of 403 strains of extremophilic actinomycetes isolated from various
soil types of
B2.11. Influence of
iron ions on the poly (adpribose) polymerase and DNA topoisomerase II
activities of eukaryotic cells. /G.Zaalishvili, D.Margiani, I.Gabriadze, K.Kutalia,
K.Kolkhidashvili, T.Zaalishvili/. Proceedings of the
The
influence of iron salts on the rat brain and liver cell nuclear poly (ADP
ribose) polymerase and nuclear matrix DNA topoisomerase II activities has been
studied. The inhibition of both poly (ADP–ribose) polymerase and topoisomerase
II activities by Fe2+ and Fe3+ ions has been shown. It is supposed that iron
ions can inhibit nuclear poly (ADPribose) polymerase activity not only by
affecting nucleoprotein system but also by participating in the formation of
such complexes with the substrate of poly(ADPribose) polymerase (NAD), which
are not convertible by the enzyme.
B2.12. Contribution to the
mycobiotic diversity of
16
species of microfungi associated with Myricaria Germanica in
B2.13. Foraminifers and
palynomorphs in the Sarmatian deposits of Kartli (
The
foraminifers and palynomorphs from Sarmatian deposits of two sections,
Nadarbazevi and Uplistsikhe, were studied. The foraminiferal assemblages allow
establishing Late Volkhynian (beds with Elphidium
aculeatum) and Early–Middle Bessarabian (beds with Affinetrina voloshinovae and Porosononion
aragviensis) ages. The palynological analysis reflects the changes of
ecological–systematical composition of the flora and allows interpreting the
evolution of vegetation on the
B2.14. Adaptive
potentials of Artemisia L. species to
heavy metal contamination depending on their habitats. /E.Alirzayeva, T.Shirvani, G.Babayeva, V.Ali–Zade/.
Proceedings of the
Adaptive
possibilities and heavy metal (HM) accumulating capacity of two indigenous
dominant Artemisia L. species (A.fragrans and A.szovitsiana) widespread on different contaminated locations of
B2.15. Insecticidal properties
of mannose–binding lectin from dioscorea
batatas tubers. /M.Gaidamashvili, Y.Ohizumi, T.Ogawa, K.Muramoto/. Proceedings
of the
Mannose–binding
lectin DB1 from Dioscorea batatas tubers
was examined for insecticidal activity against Helicoverpa armigera and Helicoverpa
assulta (Lepidoptera: Noctuidae) larvae at different stages of development.
The rate of adults successfully emerging from pupae fed on DB1 was 33% when
incorporated into artificial diet at the rate 0.01% (w/w). DB1 had no, or
revealed marginal inhibitory effects on gut proteolytic and hydrolytic enzymes
measured by FITC assay. The results show that mannose–binding lectin DB1 from Dioscorea batatas may fulfill defense
role against insect pests.
B2.16. The genetic effect of lead nitrate on Allium cepa
at
the early stage of ontogenesis. /G.Shevardnadze,
K.Goginashvili, Sh.Sharia, L.Shalikashvili/. Proceedings of the
Georgian Academy of Sciences. – 2008. – vol.6. – No.3–4. – pp. 88–90. – Eng.
res.: Geo, Eng.
Short–term
(24 hours) and prolonged (240 hours) genetic effects of lead nitrate have been
studied in Allium cepa at an early stage of
ontogenesis. Examination of different doses (0.001M, 0.01M and 0.1M) of the
compound revealed mutagenic activity of all the tested doses. In
addition, the highest dose was cytotoxic and induced extremely high level of
chromosome aberrations leading to the death of the plant within 2–3 weeks after
sprouting.
B2.17. Enchodelus muchuriensis n sp. (Nematoda, Dorylaimida) from
The
paper deals with the description of the new species Enchodelus muchuriensis n. sp. (Nematoda, Dorylaimida) from
B2.18. Spreading of nematodes
in the predatory mammals of Imereti region (
Helminthofauna
of predatory mammals of Imereti region was studied. It was found that 11
species of predatory mammals in Imereti region are characterized of their own,
specific helminthofauna from Nematode class. 63.18% of the investigated animals
turned out to be infested. 25 species of parasitic nematodes were found in the
studied predatory mammals.
B2.19. Case of cestode
invasion of African rock python (Python Sebae
Gmelin, 1788) in
The
paper deals with the morphological description of Cestoda found in the small intestine of the African rock python (Python sebae) delivered from
B2.20.
Infrared absorption spectra and biological characteristics of benzoyl hydrazone
with benzaldehyde and coordination compounds of some metals with benzoyl
hydrazone of benzaldehid. /G.Tsintsadze,
T.Giorgadze, T.Tsintsadze, I.Gvelesiani, L.Skhirtladze, E.Topuria/. Georgian
Chemical Journal. – 2008. – vol.
2. – No.2 – pp. 109–111. – Geo.
res.: Eng. Rus.
A spectral study of synthetic coordination compounds of MCl2·L2·mH2O
(where M = Co (II), Ni (II), Cu (II),
Zn, Mg, Ca, Ba) composition has been conducted. The influence of BHBÀ on the development of some microorganisms has been studied.
B2.21. Synthesis, structure and properties of arsenic,
stibium and bismuth bio-coordinative admixtures with carbonate acid amides. /T.Tsivtsivadze, N.Chigogidze, R.Skhiladze, R.Kldiashvili,
G.Sulakvelidze/. Georgian Chemical Journal. – 2008. – vol.2. – No. 2 – pp. 112–122. – Geo. res.: Eng, Rus.
The latest
methodology of synthesis of arsenic, stibium and bismuth bio-complex admixtures
with pyridine carbonate acid (picoline, nicotine and isonicotine acids) amides
is worked out and by using absolute ethanol as a solvent (by adding some drops
of concentrated hydrochloric acid or nitric acid and heat–ing), 27 new
bioactive substances are extracted in a solid state with the total structure:
MX(L)n–(C2H5OH), whe–re M = As(III), Sb(III),
Bi(III), X = F,Cl,Br,I; L = PkA (Picoline Acid Amide), NkA (Nicotine Acid
Amide), InkA (Isonicotine Acid Amide); n = 1,2,3; m = 1,2. The methods of
purification and preparation for synthesis of initial substances, particularly
of arsenic, stibium and bismuth salts – halides (fluorine, chlorine, bromine,
iodine, nicotine, isonocotine acids) amides, solvent selection, purification
and water disposal, optimum conditions for extraction of synthesized complex
admixtures, results obtained from studying chemical com–position,
individuality, colour, solubility in different solvents, melting point, thermal
resistance and molecu–lar structure by means
of modern physical and chemical methods are proposed. The influence of
metal–complex–producing acid and organic ligands, the conditions of
carrying out synthesis on types of coordination in complexes, on revealing and
defining correlation in the fundamental problem “substance content–structure–property”
on the content and structure is determined, which substantially facilitates the
planning and purposeful maintenance of synthesis and obtaining bio-complex
admixtures with properties predicted beforehand.
B2.22.
Nitrogen containing hindered phenols – inhibitors of thermo–oxidation of
polypropylene. /N.Yusubov, M.Mamedov,
R.Kasimov, Y.Markova, N.Janibayov/. Georgian Chemical
Journal. – 2008. –vol.2.
– No. 2. – pp. 123–126. – Rus. res.:
Geo, Eng.
Some
nitrogen-ontaining steric hindered phenols (Mannix bases) have been
synthesized. Among the synthesized compounds, aminometylphenols
having 2,6–ditertbutyl radicals reveal the highest activity against
termo–oxidation of propylene.
B2.23.
Quantum–chemical values of relative
reactivity of dimethylthienylvinilsilane and dithienylmethylvinilsilane in
reactions of copolimerization with methylmetakrilate. /N.Kupatadze, O.Mukbaniani, E.Marcarashvili,
L.Kalatozishvili/. Georgian Chemical Journal. – 2008. – vol.2. – No.2 – pp. 131–134. – Geo. res.: Eng, Rus.
In recent years,
besides experimental searches, all relative reactivity of monomers which
participate in reactions of copolimerisation, great attention is paid to their
quantum–chemical calculation with a view to establish parameter values of
reactivity. On the basis of a quantum–chemical research of molecules of
methylmetakrilate (MMA) dimethylthienylvinilsilane (DMTVS) and
dithienylmethylvinilsilane (DTMVS), as well as their excited states and
simplicified a–radicals,
a sequence of their activity in chemical reactions has been determined: DMTVS
< DTMVS < MMA that is proved by comparing them with the experimental
data.
B2.24.
Synthesis of sugar derivatives. /R.Gakhokidze,
L.Tabatadze, M.Tatarishvili, N.Sidamonidze, N.Pirveli/. Georgian Chemical Journal. – 2008. – vol. 2. – No. 2. – pp. 135–139. – Geo. res.: Eng, Rus.
By
interaction of allylderivatives of monosaccharides and disaccharides (glucose,
galactose, maltose, lactose) with phenylsulfochlorides and
ethyl–2–bromopropanoate are obtained:
2,3,4,6–tetra–O–ace–tyl–D–glucopiranosyl–2–methyl–4–bromopentanoate; ethyl
ß–O–2,3,4,6–tettra–O–acetyl–D–galactopiranosyl–2–methyl–4–bromopentanoate;
hepta–O–acetyl–1–O–(α–methyl–g–bromvalerat)–ß–D–maltose, hepta–O–acetyl–1–O–(α–methyl–g–bromvalerat)–ß–D–lactose and
2,3,4,6–tetra–O–acetyl–1–O–(2–chloro–3–phenylthiopropyl)–ß–D–glu–copiranose;
2,3,4,6–tetra–O–acetyl–1–O–(2–chloro–3–phenylthiopropyl)–ß–D–galactopiranose;
hepta–O–acetyl–1–O–(2–chloro–3–phenylthiopropyl)–ß–D–maltose;
hepta–O–acetyl–1–O–(2–chloro–3–phenylthiopropyl)–ß–D–lactose.
B2.25.
Modeling of cyclohexane hydrocarbons dehydroalkylation process over
modified pentasyls. /F.Veliyeva/. Georgian Chemical
Journal. – 2008. – vol.2.
– No. 2 – pp. 140–143. – Rus. res.:
Geo, Eng.
The article presents the results of a study of kinetic regularities
of cyclohexane hydrocarbons dehydroalkylation reaction over pentasyl modified
with platinum and gallium in the presence of O2 and CO2
mixture. The reaction mechanism has been considered and the numerical values of
thermal effects stages have been found. The constructed mathematical model has
been used for studying the reactor with fluidized bed of catalyst.
B2.26.
Some pecularities of glasses and silicates in the systems of complex materials.
/A.Sarukhanishvili, E.Matsaberidze, M.Kapanadze,
M.Mshvildadze/. Georgian Chemical Journal. – 2008. – vol.2. – No.2 – pp. 144–147. – Rus. res.: Geo, Eng.
The work provides
some suggestions on the mixture composition influence on silicate formation,
receiving melt “microphase” composition and products of its super–cooling
(glass). It is supposed that the introduction of a complex material into the
mixture, besides the improvement of technico–economic indexes of glass
production, gives the glass a structure which differs from traditional
materials containing base production glass structure, on condition that the
oxide composition of glass stays unchanged.
B2.27. Manganese oxide catalysts–adsorbents for gas
cleaning from hydrogen sulfide. /V.Bakhtadze, V.Mosidze, R.Janjgava, D.Kartvelishvili, N.Chochishvili,
N.Kharabadze, M.Pajishvili/. Georgian Chemical
Journal. – 2008. – vol.2. – No.2. – pp. 148–150. – Rus. res.: Geo, Eng.
Manganese tabletted catalysts–adsorbents have been elaborated for
cleaning hydrocarbon gases from H2S based on the concentrates of manganese
natural ores. It was demonstrated that manganese catalyst–adsorbents, by their
activity, capability for absorption of H2S, and by technological
regime of operation, are highly competitive with industrial zinc absorbers of
some type and have better characteristics in terms of mechanical strength and
thermal stability.
B2.28.
Investigation of astochiometric compound combinations influence on catalytic
reactivity of a decationized sample of clinoptilolite. /T.Kekelia, A.Mskhiladze, T.Kheladze, N.Takaishvili, Sh.Sidamonidze/. Georgian Chemical Journal. – 2008. – v.2. – #2 – pp. 151–154. – Geo. res.: Eng, Rus.
Influence of
astochiometric compound combinations on the catalytic reactivity of a maximally
decationized sample of natural clinoptilolite has been investigated in relation
with the model reaction of ethanol dehydration. The activity of catalyst is
found to increase upon use of the CO+NO2 or CO+CO2 combination, but it
is less than the activity received by addition of only CO2, and especially by addition of single NO2. It should be mentioned that dehydration of
ethanol is carried out by strong B–centers, but intermole–cular dehydration is
conducted by both B and L–centers, also by Fe3+ ions migrated to positions M1.
B2.29.
Study of fractional composition of Samgori and Supsa oils (
The imitational
distillation (SimDis) of Samgori and Supsa (Well #42) oils is completed
according to the
B2.30.
Kinetics and mechanism of the reaction proceeding in o–aminophenol–bromate–vanadium
(V) indicator system. /T.Dadianidze,
N.Dzotsenidze, Al.Dadianidze, G.Kutateladze/. Georgian
Chemical Journal. – 2008. – v.2. – #2. – pp. 157–160. – Geo. res.: Eng, Rus.
The indicator
reaction of oxidation of o–aminophenol with bromate is used to determine
micro–quantities of vanadium (V) by a kinetic method. Optimal conditions are
established. Protonated 3–amino–phenoxazon–2 is identified as a result product
of the reaction of oxidation. The mechanism of the reaction has been suggested.
Experimental data obtained proved the formation of peroxyvanadate in the
reaction under optimal conditions. The catalyst plays the role of a
coordinator. Taking into account the mechanism of the reaction and protolytic
quasi–equilibrium existing in the system, the kinetics equation has been
offered. Based on this equation and the experimental data obtained, the value
of dissociation constant of peroxyvana–date is calculated. The value calculated
is in agreement with the value determined spectrophotometrically and with
literary data for similar complexes.
B2.31. Quantum-chemical study of 2–hydroxy–1,2,3–propanetricarboxylic
acid (citric acid) reactivity. /G.Tsintsadze, T.Tsivtsivadze,
M.Tsintsadze, M.Gogaladze, D.Lochoshvili, I.Beshkenadze, I.Gvelesiani,
J.Kereselidze/. Georgian Chemical
Journal. – 2008. – v.2. –#2 – pp. 161–164.
– Geo. res.: Eng, Rus.
By a semi–empirical
AM1 method, the heat of formation of citric acid (H3L) as well as an
interatomic dis–tances, bond orders, valence angles, effective atomic charges,
electron densities, electron populations on atomic orbitals etc. have been
calculated. The capabilities of coordination of the molecule with a
metal–complex former have been determined.
B2.32.
IR spectra study of the complexes formed with nickel rhodanines. /N.Mgaloblishvili, N.Telya, G.Tsintsadze/. Georgian
Chemical Journal. – 2008. – v.2. – #2 – pp. 165–167.
– Geo. res.: Eng, Rus.
The structure of the
complexes formed by rhodanine derivatives with nickel (II) has been studied for
the first time by the spectroscopic and quantum–chemical semi–empirical AM1
methods. It has been demonstrated that the rhodanines derivatives with nickel
coordinate via one of the nitrogen atoms of the oxygen of carboxyl groups and
azo–group of their molecules, presumably, via N(7). As the ratio of the
reacting components in complex compounds is NI:L=1:2, their structure is
presented as octahedral Ni(O,N,O)2, with the nickel coordination
number of six.
B2.33.
Theoretical investigation of amino acids within the scope of
quasi–ANB–matrices method. /M.Gverdtsiteli, M.Bedinashvili, M.Gverdtsiteli/. Georgian
Chemical Journal. – 2008. – v.2. – #2 – p.168. – Geo. res.: Eng, Rus.
A theoretical
investigation of correlations “structure – properties” has been carried out for
amino acids within the scope of quasi–ANB–matrices method. Correlations
are satisfactory.
B2.34. Theoretical
investigation of unbranched alcohols within the scope of pseudo–ANB–matrices
method. /M.Gverdtsiteli, G.Otinashvili,
M.Gverdtsiteli/. Georgian
Chemical Journal. – 2008. –v.2. – #2 – p.169.
– Rus. res.: Geo, Eng.
Correlations
“structure–properties” are studied for unbranched alcohols within the scope of
the pseudo–ANB– matrices method. Calculations show that correlations are
satisfactory.
B2.35. Theoretical investigation of correlations
“structure – properties” for b,Ω–glycols within the scope of quasi–ANB–matrices method. /M.Gverdtsiteli, N.Kupatadze, E.Markarashvili,
M.Gverdtsiteli/. Georgian Chemical Journal. –
2008. – v.2. – #2 – pp. 170–171. – Eng. res.: Geo, Rus.
Correlation equations
were constructed and studied for b,ω–glycols
within the scope of quasi–ANB–matrices Method. Calculation show that
correlations are “good”.
B2.36.
Standardization of roots of dead–nettle digamous (Urtica dioica L.). /P.Iavich, L.Churadze,
T.Rukhadze, N.Gagua, N.Kavtaradze, M.Getia/. Georgian
Chemical Journal. – 2008. – v.2. – #2 – pp. 172–173. – Geo. res.: Eng, Rus.
Methods of
standardization of roots of dead–nettle growing in
B2.37. Technological
and biopharmaceutical investigation of stomatological medicinal ointments. /P.Yavich, M.Javakhia, E.Gasviani, T.Rukhadze/. Georgian Chemical Journal. – 2008. –
v.2. – #2 – pp. 174–175. – Rus. res.: Geo, Eng.
A recipe and technology of preparation of stomatological ointments
containing water and mineral mud „Akhtala” have been elaborated. A number of
biopharmaceutical investigations confirming the possible medecinal activity of
the ointments are carried out. The conclusion about the possibility of their
application in stomatological practice is made.
B2.38. Investıgatıon of the walnut (juglais regia) leaves extraction process. /K.Goletiani, G.Tsagareishvili/. Georgian Chemical Journal. – 2008. – v.2. – #2 – pp. 176–177. – Rus. res.: Geo, Eng.
The walnut leaves
extraction process has been studied in terms of dependence on ethanol
concentration, phase ratio, and extraction temperature. The optimal parameters
of the extraction process have been established.
B2.39.
Elaboration of complex remedies based
on Tikha–askane and walnut leaves extract. /G.Tsagareishvili,
K.Goletiani, P.Iavich/. Georgian
Chemical Journal. – 2008. – v.2. – #2 – pp. 178–180. –Rus. res.: Geo, Eng.
Prescription and
technological process for the obtaining of suspension on the basis of
Tikha–askane and walnut leaves extract have been worked out. Colloidal
stability, rheological properties, and liberation (diffusion VS
semi–permiteable membrane into agar gel) have been studied. The said suspension
has been found to meet all the appropriate requirements.
B2.40.
Physico–chemical characteristics and aminoacid composition of an elder grassy (Sambucus edulus L.) berries juice. /V.Khvedelidze, G.Gorgodze, M.Bakhtadze, V.Kvantidze, L.Berekashvili/. Georgian Chemical Journal. – 2008. – v.2. – #2. – pp. 181–183. – Rus. res.: Geo, Eng.
The physico–chemical
indicators and the presence of aminoacid in the juice of the elder–berry grown
in the Tskaltsitela gorge (
B2.41. Chemical study of the collection of antioxidant
active plants. /V.Khositashvili,
L.Khositashvili, N.Mindiashvili, G.Chakhunashvili, M.Sutiashvili/. Georgian Chemical Journal. – 2008. – v.2. – #2 – pp. 184–185. – Geo. res.: Eng, Rus.
It
is ascertained that equal amount of parts of some medicinal plants in
B2.42. Unconventional
ways of fuel production and their impact on the environment. /N.Khetsuriani, K.Goderdzishvili, E.Topuria, G.Shavgulidze, M.Chkhaidze/. Georgian Chemical Journal. – 2008. –
v.2. – #2 – pp. 186–189. – Rus. res.: Geo, Eng.
Modern methods of
liquid motor fuel production from raw organic materials as an alternative to
petroleum (coal, plant biomass and syn–gas) are considered. The data on the
properties and application of different alternative liquid fuels are given.
B2.43.
On the problem of arsenic (V) removal from water. /T.Iashvili, G.Jincharadze, N.Bokuchava, D.Jincharadze, N.Gamkharashvili/.
Georgian Chemical Journal. – 2008. – v.2. – #2 – pp. 192–195. –
Rus. res.: Geo, Eng.
For the removal of
arsenic from water some coagulants have been tested. A quantity of the
substance which improves the hydrolysis process of the coagulant has been
selected. The best filtering material and speed of filtration have been
determined as well as the method of regeneration of the filtering material. The
rational procedure for the removal of arsenic has been developed, where
aluminum sulphate is used as a coagulant. The ratio of arsenic removal reaches
95–96%.
B2.44.
Application of ozone for obtaining
manganese dioxide. /T.Chkonia, T.Maslentsova, B.Purtseladze,
E.Shoshiashvili, I.Chkhaidze, M.Svanidze/. Proceedings of the
The article deals with the data on working out of a
manganese dioxide obtaining technology through oxidation of Mn(NO3)2 by adding ozone to the solution. The product obtained under given conditions shows high electrochemical
activity.
Ref. 6, Tab. 3.
B2.45. Capacitive
behavior of manganese dioxide films prepared by anodic deposition in the
presence of chromate ion and polyvinyl spirit for super condensator. /G.Tsagareli,
E.Kachibaia, S.Machatadze, R.Imnadze, T.Paikidze/. Proceedings of the
The hydrous manganese dioxide thin films were deposited
on the platinum plate anode from the solution
containing 0,002 mol/l MnSO4, 0,02 mol/l (NH4)2CrO4
and 1 g/l polyvinyl alcohol. Cyclic voltammograms were measured in 0,5 mol/l Na2SO4 at a
scan rate of 50 mV/s between 0,1 V and 0,9 V (Ag/AgCl). The initial specific
capacitance estimated from the voltammetric data was 370 F/g and this volume
decreased by 15% after 400 cycles. The polyvinyl alcohol addition to plaiting
solution significantly increased reversibility and improved cyclic
voltammograms shape. Thus, the manganese dioxide thin films were found to be promising electrode material for electrochemical
supercapasitor. Ref. 6, Fig. 3.
B2.46.
Definition of the exponent in the
kinetic equation of growth of volatile scale. /I.Nakhutsrishvili/.
Proceedings of the
Formal kinetics of
partially volatile scale growth has been considered. An expression for the
exponent in the corresponding kinetic equation has been found. Abs. 3, Fig. 3.
B2.47.
Water–sorption capacity of some natural zeolites from
Georgian deposits. /T.Kordzarhia, M.Burjanadze, M.Dzagania/. Proceedings of the
The advantage of zeolites’ use in the desiccation
process of objects with low-moisture content as compared with other
adsorbents has been shown. The adsorption property and maximum capacity of different
zeolite-bearing rocks of Georgian deposits in relation to water vapor have been
studied by the methods of desiccative and thermal analysis. It has been shown
that the cation–exchange modification of clinoptilolite-bearing rocks has a negligible effect
on the adsorption property of these adsorbents in relation to water. It has
been found that phillipsite-bearing rocks are characterized of the best
adsorption property in relation to water.
B2.48.
Investigation of the mechanism of solid
solution creation process in the system Li2O.Xfe2o3. D.Lanchava, M.Khundadze, T.Machaladze, N.Lezhava/. Proceedings
of the
Analysis of the investigation results and
their comparison to the literary data gives the basis to assume the mechanism
of ferrite creation process as the
consecutive stages of transformations under conditions
of synthesis: (1) primary formation of
lithium orthoferrite – LiFeO2 from
the charge (Li2CO3 + Fe2O3);
(2) decay of LiFeO2 into thermodynamically steadier phase LiFe5O8 and
Li2O
under conditions of synthesis (the presence
of surplus Fe2O3 and oxygen area) by the scheme: 5LiFeO2 = LiFe5O8 + 2Li2O;
(3)
dissolution of Li2O in LiFe5O8 and
formation of solid solution with the general formula LiFexO2+1,5(x–1)
x= 2,3,4,5. This type of dissolution can be compared to
the case of isodimorphic mixing of different structures with a changing number of
atoms in a solid solution. To
this promotes the distinctive for
LiFe5O8 super–structural ordering in octahedral
sub–lattice. This case can be compared with the well-investigated
system LiCl – MgCl2, where the stratum ordering of ions Mg2+ and vacancies is
supposed, and thus, the structure and some properties of solid solution gets
features of structure of MgCl2. In our case,
we have spinel structure for all compositions and the same critical points of
phase transformations (TK – 6200C and Ttr
– 7200C). Since the compositions Li2O.xFe2O3
(x = 2,3,4,5) have crystal structure of spinel, for revealing the true character of dependence of enthalpy of
transformations Htr on composition, it is
necessary to reduce their formula to the uniform
7–atomic unit: Li1,08 Fe2,15O3,77 (õ=2), Li0,79Fe2,33 O3,88 (õ=3), Li0,69Fe
2,46O3,95 (õ=4), Li0,5 Fe2,5O4 (õ=5). It is obvious
that we deal with solid solutions of non–stoichiometric structures with oxygen
deficiency which gradually decreases from õ=2 (aside growth õ) and only at õ=5
the stoichiometry is reached. The results of calorimetric investigations (HT–1500 Setaram) are
represented as corresponding tables and graphs. Abs. 4, Tab. 1, Fig. 2.
B2.49.
Synthesis, phase composition and
structure characteristics of LiNi0.5Mn1.5O4 spinels
as 5V cathode materials for Li–ION accumulators.
/E.Kachibaia, R.Imnadze, T.Paikidze, R.Achvlediani/. Proceedings of the
LiNi0.5Mn1.5O4
samples as cathode materials for Li–ion accumulators were synthesized through various methods. According to physical and chemical
studies, the solid state high temperature method as well as the comparatively
low temperature melt–impregnation method do not provide for the formation of
phase- pure LiNi0.5Mn1.5O4 compounds with
spinel structure. In addition to the spinel phase, the hexagonal phase with a =2.886Å
and c =14.28 Å is fixed in the samples that leads to low capacity and
emergence of 4V plateau. High dispersal phase–pure samples of LiNi0.5Mn1.5O4
obtained through sol–gel as well as through a method simpler than the former
one (without using complex formation agent) will attract interest as 5V cathode
materials for lithium–ion accumulators.
B2.50.
Quantum–chemical description of regioselectivity of connection to asymmetrical
ethylene bond. /T.Zarkua, J.Kereselidze,
Z.Pachulia/. Proceedings
of the
Regioselectivity of
reaction of the HBr connection to assimetrical ethylene bond is quantitatively
described on the basis of enthalpy of activation (DDH#)
and heat of reaction (DDH) values
calculated by means of a quantum–chemical semiempirical AM1 method. It is
concluded that the formation 2Br–pentane is energetically more favourable. Abs. 3, Fig. 2.
B2.51.
Determination of net compactness for structured polychloroprene rubbers. /M.Shalamberidze, Z.Kopaladze,
N.Lomtadze/. Proceedings
of the
The solidification
process of latent and polyizocianative solidified structured polychloroprene
rubbers Nairit–DKT–80 and Nairit–HT has been investigated in dimethylformamyde
and toluene. The physical parameters of a network for the structured
polychloroprene rubbers are given.
B2.52.
Electroconductivity of glass host matrix with embedded CuCl quantum dots. /R.Janelidze, M.Kaziashvili, O.Bakradze, V.Edilashvili/. Proceedings of the Georgian National Academy of Sciences, Chemical
Series. – 2008. – vol.34. – #1. – pp. 91–94. – Rus. res.: Geo, Eng.
The electroconductivity of glass matrix samples doped with CuCl quantum
dots of different radii has been measured and the relation between the value of
conductivity and quantum dot radius has been investigated. It is shown that the
larger the matrix radius, the smaller is its conductivity. This fact can be
explained by exclusion of ions incorporated in the quantum dots from the charge
transport process.
B2.53. Influence of synthetic zeolite on wheat seed germination. /L.Eprikashvili, M.Zautashvili, M.Dzagania,
N.Pirtskhalava, N.Burkiashvili/. Proceedings of the Georgian National
Academy of Sciences, Chemical Series. – 2008. – vol.34.
– No.1. – pp. 103–106. – Rus. res.:
Effects of the soil enriched with laumontite-bearing rocks and the
synthetic zeolite CaA on the germination of winter wheat seeds in the
laboratory environment have been studied. It has been established that the
synthetic zeolite CaA effects seed germination and the height of sprout of
wheat plant to a greater extent than the laumontite-bearing rocks, the fact
being apparently related to the structural features of the synthetic zeolites.
B2.54. Thermal analysis
of butadiene–styrene
rubbers under structurization
with latent solidifier. /M.Shalamberidze, Z.Kopadze, N.Lomtadze/. Proceedings of the
The physical, phase
and thermal transition processes of structurization and destruction of
butadiene–styrene rubbers with latent solidifier LΖ3 have been studied. It is proved that the structurization of
polymer compositions by latent solidifier LΖ3 takes place in the temperature range of 150–1700 Ñ during 3–3.5
minutes.
UDC 678.742.2.038.6
B2.55. Selection of stabilizers for Eklari-filled PVC
composites. /N.Kheladze, K.Pataridze, D.Kiria,
L.Kheladze, M.Sharabidze, T.Nadiradze/. Novation. – 2008. – No.2. – pp.
33–37. – Rus.
res.: Geo,
The
work discusses the influence of stabilizers on PVC composites
obtained from the mineral filler – white and pink Eklari prevalent in
western
B2.56. Methods of studying
manganese acetate compounds (II). /I.Bregvadze/. Novation. – 2008. –No. 2. – pp. 38–45. Geo. res.: Geo,
The work
deals with the individuality of all acetate compounds (II) educed by using the
method of IR spectroscopy, x-ray spectral analysis and termography. The
carried out conductivity studies of water solutions of acetic manganese
compounds (II) show that acetic groups are found in the internal
coordination sphere. The water solutions of acetic manganese compounds
(II) behave as three-ion electrolytes. The IR absorption spectra were
recorded in the 400–4000 cm–1 area of the spectrophotometers UR–10.
It is shown that in the studied manganese complexes (II) the condition of
acetic groups is close to that of ionic. The stretching vibrations of the acetic
groups are predominantly within the field of ~1550–1570 and ~1410–1420 cm–1
respectively. These oscillation values do not significantly differ from the values
of similar frequencies in the spectra of acetic alkaline metals
that, obviously, is indicative of the predominantly ionic state of the acetic
groups in the acetic manganese complexes (II) studied by us. These
predominantly ionic bonds of manganese (II) – oxygen atoms of carboxylic
groups acetic groups are, however, relatively stable, since the complexes,
as already indicated above, do not detach acetic groups when dissolved in
water, but behave as acetic electrolytes. The methods of thermography are
used to characterize the processes of thermal transformation of acetic
manganese compounds (II) upon their continuous heating at ambient air
temperature up to 600-1000 0Ñ. In the beginning they lose water,
then the acetic groups, producing as the end product (with admixtures of
alkaline metals) mostly oxide Mn3O4.
B2.57. Friction and wear
peculiarities of a nanoporous-based brake block lining. /E.Kutelia,
D.Gventsadze, O.Tsurtsumia, R.Datiashvili, L.Gventsadze/. Novation. – 2008. – No.2. – pp. 46–55. – Geo. res.:
Geo,
The present work deals with the
study of the effect of introduction of a nanoporous ingredient into the
brake block lining composition on the friction and wear
characteristics. Nanopores are formed in the composite by means of diatomite
particles. A study of the friction peculiarities and wear mechanisms of the
developed porous composites shows that that the particles’ microstructure
and the heat resistance (up to 900° C) determine high tribological
characteristics under conditions of both dry and wet friction. These
materials have an aesthetic (not black) colour and its wear products are relatively
easy washable. The employment as a binding agent for the new generation
composite material of a chemically modified phenol–formaldehyde resin has
improved the tribological characteristics of the brake blocks up to 6000
C of operational temperature, having increased their efficiency almost twofold.
Variation of the content of barium sulfate and diatomite in the composite
makes it possible to control the constant of friction within the required
range. Values of the constant of friction under conditions of dry friction
vary in the range of 0,3–0,45 and remain factually the same under conditions
of wet friction. The obtained results allow concluding that the new developed
composite is the best material for brake block linings as compared with the
conventional asbestos-free materials.
B2.58.
Control of the cellulase and xylanase synthesis
of basidium fungi. /M.Bakradze, N.Dzotsenidze/.
Novation. – 2008. No.2. – pp. 55–59. – Rus. res.: Geo, Rus, Eng.
An induction
mechanism of the cellulase and xylanase synthesis controllable by a single
regulatory gene, has been discivered for a line of basidiomycetes.
Analyses carried out by involving different basidiomycetes have confirmed that the fungi cellulases and xylanases
represent an inducable enzyme. The basidial fungus Schizopyllum commune
showed the highest activity on the third day of fermentation. The last
activity maximum was marked on the 12th day of the cultivation.
B2.59. Effect of
vulcanization techniques on conductivity of silastic and graphite extenders. /J.Aneli,
O.Mukbaniani, T.Kakulia, M.Bolotashvili, L.Shamanauri/. Novation. – 2008. – #1. – pp. 13–21. –
The
effects of the receptor factor and vulcanization
techniques on the conductivity and mechanical strength of rubbers produced on
the basis of silastics and graphite extenders have been investigated. It is
shown that the composites containing the thermally expanded graphite and the
so-called highly structured technical carbon significantly increase
conductivity of the materials produced by using all the vulcanization
techniques. In addition, if the vulcanization proceeds by using the
polymerization filling method, both the conductivity and mechanical strength
increase by several orders. The obtained data are explained by changes in the
microstructure of the vulcanized rubbers as a result of a significant
difference in the structure of the vulcanized rubbers and the sizes of the
surface physico-chemical characteristics of the filler particles. These factors
essentially influence the particles distribution character in the polymer
matrix and, consequently, the composite material conductivity.
B2.60.
Development
of plant radiobiology in
In this article the basic points concerning with formation and development of plant
radiobiology as scientific discipline in
B3.1. The influence of climate on the
development of natural
exogeological processes and
criteria of their assessment. /G.Gobechia, E.Tsereteli/. Scientific Works of the Georgian Institute of Water
Management.
– 2007. – #63 – pp. 33–35. – Rus. res.: Geo, Eng, Rus.
The paper discusses
the question of the influence of climate on the development of exogeological
processes – intensively developed in mountainous regions of
B4. Geography. Cartography. Astronomy
B4.1. Investigation of the geological stability of the
natural–technogenic complex of the Bzhuzha HPS. /T. Tevzadze, S. Kandelaki, D. Potskhveria, D.
Lortkipanidze/. Scientific Works of the Georgian
Institute of Water
Management. – 2007. – #63 – pp. 77–90. – Geo. res.:
Geo,
The paper considers
the conditions of equilibrium of the existing geoecological situation of the
natural–technogenic complex (principal structure – environment) of Bzhuzha HPS.
The possible development of negative phenomena has been determined on the basis
of determination of physical properties, stress and other stability
characteristics, as well as of the angle of internal friction and cohesion at
the smooth state of the surface of rocks. Appropriate protective measures have
been selected.
B4.2. Correlation between the solar radio
noise storm and the photosphere optical formations. /Sh.
Makandarashvili/. Bulletin of the
A ong-term observation of the solar radio noise storms
carried out at E.Kharadze Georgian National Astrophysical Observatory on the
solar radio telescope at 210 MHz is presented. It is shown that there is a
strong correlation between the amplitude of the noise storm and sunspot number
and their access.
C. TECHNICAL AND APPLIED SCIENCES. SECTORS OF ECONOMY
C1.1. Use of solar
energy to increase
the service
life of
waterworks. /I.
Iremashvili/. Scientific Works of the Georgian
Institute of Water
Management. – 2007. – #63 – pp. 119–126. – Geo. res.:
Geo,
Questions of using
new energy–saving technologies in construction are discussed briefly in the
paper. The dynamics of propagation of thermal energy in concrete under
one–sided and two–sided heating has been studied. A technology of thermal
treatment of concrete with the aid of polyethylene films is proposed. The
temperature changes in the upper layers of concrete by the coverage degree and
the concrete temperature increase by using solar energy are presented in a
tabular form.
C1.2. Forms of water in soils, power of interaction, classification and methods of identification. /L.
Itriashvili, Kh. Kiknadze,
On the basis of an
analysis of numerous literarary data and findings of personal studies, the
paper proposes: a specified power conception of water–soil interaction, a new
classification of forms and categories of water, and methods of practical
determination of the quantitative indices of the corresponding moisture
content.
C1.3. Variable-head
hydroelectric power plant. /V.Jamarjashvili, G.Gigiberia/. Energy.
– 2008. – #3(47). – pp. 9–17. – Geo. res.:
Geo,
In accordance with
the proposed technology, the river-supplied hydroenergy will be used on a HPP
water reservoir, which is lost on existing HPPs when the water level in the
reservoir varies from the maximum to the minimum value, and vice versa, i.e. in
the months of the drawdown (autumn–winter) and impoundment (spring) of the
reservoir. The innovative variable-head HPP withdraws water from a diversion
facility located near the river inflow to the reservoir. Thereafter, by a
diversion conduit the water is supplied to the elevated reservoir located in
the lowest water level mark. From the reservoir, a turbine pipeline is directly
connected to the hydraulic unit that can be mounted on a platform floating in
the water reservoir. The variable-head HPP will operate on variable pressure.
In the case of a pressurized diversion, the arrangement of the elevated
reservoir may no longer be needed. The innovative technology has been patented.
The proposed technology is cost-effective and can be introduced on the
following water-reservoir Georgian HPPs: Zhinvali, Inguri, Sioni, also Khudoni,
Namakhvani, etc. in the future.
C1.4. Calculation of leakage inductance in double steel-core reactor. /R.Arveladze, K.Tsereteli, Z.Kakhniashvili/. Energy. – 2008. –