In this work the appliance of information technologies in the social sphere is analyzed,especially in education. It is sought to properly discuss various methods, tendencies and ways of information technologies integration into education.

The subject of this work is the information resource database of education system in Utena district. The aim was to create information system, based on object-oriented technologies and fitted to users’ needs of institutions of education in Utena district. The information database system helps the administrative personnel in preschools – primary schools and education department to get the all needed information about children in nurseries – preschools, schoolchildren in primary schools – preschools and elementary schools. Data security is the important criterion of this information resource database. The users may access the permitted information only by the use of their own passwords. Requirements for structure of information, which is processed by computerized information system, are essential functional requirements of user. Database was analyzed and projected using UML notation. This software must deal such tasks: a) to solve problem of filling classes and groups sets, according with financial and educational possibilities in each educational institution; b) to computerize processes of preschool age children and school children registration and attendance accounting; c) computerizing of information interchange between educational institutions; d) standardization of common using documents, realizing on electronic patterns.

SUMMARY The work “Elektroninių kasos aparatų apskaita serviso įmonėje” (Electronic cash registers accountancy in a cervices company) gives the analysis of Joint stock company‘s “Aledakomas“ software programs for the accountancy of the maintained equipment. The purpose of the work – to create a new equipment accountancy software program that would meet the current requirements. The work gives the analysis of analogical software programs, project part of the new program, structure of the data base and the usage instructions of the new program. The main advantages of the newly created software program: · All the data about the maintained equipment is put into common accounting system; · Wider program abilities to make a data search and to generate a report; · The program is adapted to work in a computer network; · The program is compatible with WINDOW operating system.

LiDIA is a library for computational number theory. Since we find that object oriented programming is appropriate for implementing mathematical algorithms and since C++ belongs to the most accepted programming languages in scientific computing, we decided to use C++ as the implementation language for LiDIA. To guarantee easy portability of LiDIA we decided to have a very small machine dependent kernel in LiDIA. That kernel currently contains the multiprecision integer arithmetic and a memory manager. All LiDIA objects are implemented in C++ and compiled with many different compilers on various architectures. Information about LiDIA can be found in website http://mokymai.dist.su.lt/. RSA scheme, algorithms of factorization, tests of prime numbers, some elements of modular arithmetic are analysed there. Although not in the public domain, LiDIA can be used freely for non commercial purposes.

The aim of this study is the analysis of evaluating precision characteristics of the parameters of exponential - sinusoidal models. The main attention is paid to the methods of linear prediction approach: covariance, Tufts-Kumaresan and So-Leung. The evaluation of the chosen methods parameters precision to the different exponential - sinusoidal models, changing the meaning of signal - noise relationship is studied. The dependence of the results achieved by the methods on the signal - noise relationship meaning is described. The quality of the methods comparing with the specific CRB bound is evaluated. The comparative - contrastive analysis of the methods is made. In the study CRB specific and asymptotic bounds are compared. The results of numerical experiments and programs are given.

SUMMARY During the political and economic changes of Lithuanian system the institutions of public social welfare services, which were administered by Government Administration, gained more freedom in their discretion. However, some things have not changed, such as an old attitude towards employees, worn out management position. It is very difficult for the society to transform, since it has used to old, soviet methods of working. Various researches, which were conducted by different authors, show that employees themselves determine a successful realisation of tasks and goals; therefore only using adequate Human Resources Management is possible to create such system, where both management’s (administration) and employees’ needs are met and ascertains accomplishment of the risen tasks and aims of the organisation. Currently, Social Welfare Services of Lithuania are at the point of the development and a rapid growth. There are essential performs ongoing at the Institutions of Social Welfare Service – reductions in quantity of the residents, the present living conditions are being improved, the structure of the staff is being reconstructed as well. In reality, there are often detected an ineffective solutions of Human Resources Management problems in practice of Institutions of Social Welfare Services as well as incompetence, inability to achieve the risen tasks, goals and expectations of their clients. This shows, that the problems of the public organisations of Social... [to full text]

Summary Spatial visibility detection Geographic Information System (GIS) developers come across number of various tasks ant the computers using the specialized software might ease the solution. One them is detection of direct spatial visibility. The essence of this task is to check if one spatial point can be seen from a given position. Research point’s altitude, coordinates and the information about the objects in surrounding are given. Spatial visibility may not exist if there are objects intersecting the ray from the viewpoint to researched point. Intersecting objects may be buildings, roughness of surface as well as trees and other higher object in area. Detection of direct spatial visibility is essential for transmission of high and medium frequency radio waves or optical signals. To fulfill this task the program will be developed with which assistance the zones of direct spatial visibility can be obtained. The possibility to work with several viewpoints also should be provided. The program would help to find out the heights, positions and quantity of the transmitter aerials to optimize the visible area. Initial data is the altitudes of buildings and surface in researched area. The data is given in text files created by Arc/Info system.

New technologies gives an ability transfer business processes to more automated layer in such a way ensuring efficiency and labour productivity. This process is complex and imperative to improve and growth. Usability of software depends on software quality as on growth of information technologies culture. Human ability to analyze and process informational flows is quite limited and time consuming. For this reason software and hardware are essential ensuring accurateness, well-timed and automated processing of information. Processed, accurate and well-timed information is useful for any organization. There is no software which can carry out all business activities, but people having potency to use software as a tool and analyze given information ant results are also required. Only in that case an increase of efficiency and labour productivity is possible while using software.

In this work current database reengineering methods (automatic schema matching, iterative reengineering, butterfly, Chicken Little) are evaluated. Rules and principles of these methods were generalized and represented via algorithmic structures. Also it highlights main advantages and disadvantages of these reengineering techniques. New database reengineering method is proposed describing specific actions for each step during this process. Evaluation has shown that proposed method ensures the higher quality and faster database reengineering process. Also an experimental part of this method is described, transferring data from really functioning Oracle database management system to Microsoft SQL Server DBMS platform. Experimental part completed successfully including software reengineering and external tools readjustment which interacts with reengineered DBMS.

Most of Lithuanian working people who want to refresh their knowledge do not have a possibility to get out of their daily activities and to subscribe for weekly or monthly courses at some educational institution. At present there is a way the wish to improve one’s skills to match with the conveniences. It is distance learning by using information and communication technologies. This way allows to study independently in a convenient place, time and at certain speed. New information technologies and communication means: E-mail, discussion forums on Internet, chats on Internet, virtual learning space, video conferences make the basis of distance learning. The main economic entities in Lithuania are companies. They are established with the aim to produce, to provide services and to implement the activities which is necessary to satisfy the needs of people or other companies and organisations or it could be provided to the company itself. Each company is an independently functioning economic entity with its own aims, organizational structure and management personnel which implements its functions. This activity influences information flows which are used in management and coordination of activities between the chain of economic entities, divisions of companies or organisations and also between independent companies. Each information flow is described by the main features: a content, a consumer, a place of origin, a form, transfer environment, a power, regularity, periodicity... [to full text]