Ontologijos tampa vis populiaresnės, nes leidžia organizacijoms lanksčiau aprašyti dalykinę sritį, ieškoti informacijos iš skirtingų šaltinių ir pateikti semantiškai tiksliau atrinktus rezultatus vartotojams. Tačiau, augant informacijos ontologijoje kiekiui, saugoti ją tekstiniame faile tampa neefektyvu. Šio tyrimo tikslas yra pagerinti užklausų vykdymo ontologijoje galimybes, kai jos saugojamos reliacinėje duomenų bazėje. Tam buvo sukurtas SPARQL užklausų vykdymo metodas ontologijoje, saugojamoje reliacinėje duomenų bazėje pagal OWL2RDB algoritmą. Eksperimentas patvirtino, kad esant dideliam individų skaičiui, metodas leidžia greičiau vykdyti užklausas reliacinėje duomenų bazėje saugojamoje ontologijoje, negu ontologijoje, saugojamoje tekstiniame faile. / Ontologies are becoming increasingly popular because they allow organizations to describe their problem domains in a more flexible manner and to search information from multiple sources giving semantically significant results for users. However, the increasing amount of information in ontology makes its storing in a text file not effective. The aim of this research is to improve possibilities of querying large ontologies when these are kept in relational databases. The method was created for executing SPARQL queries in ontology, stored in a relational database created by OWL2RDB algorithm. Experiments have shown that the method improves query performance time in comparison with existing query engine especially for large ontologies having many individuals.

This paper is a research of problem which was faced during development of clinical information system. This is a scope, where one clinical test can by characterised by several hundreds of attributes. Thus the focus is on the design and performance of database tables with 200-300 columns. To perform the research the Oracle Database Management System was chosen. There is the main factors, influencing performance, such as principles of data storage on disk, query processing also the main facilities to improve performance observed. Based on the basic principles of relational database design some alternatives to tables with many attributes were created. It is normalized and denormalized structures. There is performed the experiment to see how the speed of most used queries depends on data structure. Also there is done the analysis of complexity and usability of these queries.

Nowadays there are lots of information systems for management of production such as CIM (Computer-integrated manufacturing systems), MRP (Material requirements planning systems), MRP II (Manufacturing resource planning systems), ERP (Enterprise Resource Planning systems). All these systems have huge possibilities. However the licence prices are enormous, the software requires big computer capacities. So they are more usable for organizations with big annual turnover. Small companies need programs which allow to collect data, store it, systematize, quickly get required information. Study object. Information system for management of clothes production orders. Study goal. To create information system for management of clothes production orders using up-to-date computer technologies. It was made analysis of organization (producing clothes) computerizing field, described functional and non-functional requirements for IS. Also made comparative analysis of information systems for management of production, project of information system for management of clothes production orders which architecture is client – server. Prepared documentation for users. Made testing and quality control. In future the functionality of the information system for management of clothes production orders can be expanded including calculations of material and production cost.

LieMSIS PDB is the system designed for gathering of scientific publications data and for statistical analysis of such data. The system allows not only analysis of scientific publications bibliographical information (sort of publication, year of publishing, etc.) but it also allows to account administrative data of the authors (position in the institution, degree and etc.). This document contains overview of LieMSIS PDB development process, LieMSIS PDB evolution from the first version to the current version and statistical data of LieMSIS PDB usage.

The purpose of this paper covered execution of one stage of semantic analysis compiuterization by development of a software able to improve the guality of automated translation. Such software "Lexes", the browser and editor routine of Lithuanian words and related to such words semantic attributes.

The purpose of my work is to make the theoretic generalization of lands estimation, to analyse the device of wholesales estimation and the chance of using that device in cadastre. In my work was inspected the national and wholesales estimation, and descripted methods and criterions of estimation. I inspected the difference and analogy between estimation method in Lithuania and in some countries of Europe union. I make the database of lands plot for Klaipėda town, using GeoMap2004 software. This database is available, for accumulation, editing and analysing of lands plot.

The information system "VMC klientai" has been established for the client's registration and panning in Kaunas Technuological University, Panevėžys Departament, the centre of Management Technology and Busines training centre. The modulus of client's registration – the internet page with instruction to reguired programmes and client's registration as well as data compiling in MySQL database and with the same database distance administration, with a help of PHP software having been created programmes codes that could have a possibility to transfer data automatically from MySQL database into the main information system "VMC klientai" Access database modulus.

In the first part of this master job was assessed a geographical feature of Utena region. In the same part was described natural condition and natural recourses of territory. In this job specific attention was given to define objects of social geography and to evaluate sectors of urbanization, transport‘s infrastructure, education and industry. The second part represents creation methodic of a visual Digital database of Utena region. To analyze the digital database was indited informative, representing spatial distribution of photographed location maps. In the other part of this job was described an internet web site www.utenosapskritis.info , which was created to represent the Digital database. In this part also was supposed the educological use of this digital database to the creative worksheets and cognitive programs. This master job is dedicated to everyone who is interested in Utena region. Created the visual digital database of Utena region has extensive adaptability worth.

The dissertation deals with the problems related to the tools of simulation of economical factors of the enterprises. The main goals of the dissertation is to analyze the main economic factors of enterprise activity, to create the educational model of economic processes, to prepare the software for distance, group and individual leaning, and evaluate possibilities to use it in learning and teaching. The several tasks were formulated for this work: to analyze the methods of modeling of economic processes, game-based educational tools and their components, factors of economic processes as well as possibilities of formal description of means; to design imitational model of business processes and to create an universal and dynamic business game according to it; to propose a method allowing to create an educational environment of simulation of business processes; to integrate business game “Kietas riešutas” (“Hard nut”) into formal and informal studies, to suggest additional components for traditional and distance learning, to evaluate applicability in educational process. Dissertation consists of introduction, four chapters and conclusions. Introduction discusses the importance of the problem, formulates goal and tasks of the work, describes scientific novelty of the work, and presents publications of the author as well as structure of the dissertation. The first chapter provides the literature review. It discusses informational technological platform of business games, compared... [to full text] / Disertacijoje nagrinėjamos mokymo procese naudojamos įmonių ekonominių veiksnių imitacinio modeliavimo priemonės. Pagrindinis disertacijos tikslas – išanalizavus verslo įmonių veiklos pagrindinius ekonominius veiksnius, sukurti edukacinį ekonominių procesų modelį, parengti nuotolinio, grupinio ir individualaus mokymo programinę įrangą ir įvertinti jos taikymo mokymui ir mokymuisi galimybes. Darbe sprendžiami keli uždaviniai: palyginti ekonominių procesų modeliavimo metodus, žaidybines mokymo priemones ir jų kompiuterinių informacinių platformų komponentus; išanalizuoti ekonominių procesų veiksnius ir formalaus aprašymo priemonių galimybes, suprojektuoti verslo procesų imitacinį modelį ir pagal jį sukurti kompiuterinį verslo žaidimą, pasižymintį universaliomis ir dinamiškomis savybėmis; pasiūlyti metodą, leidžiantį sukurti verslo procesų imitavimo mokomąją aplinką; integruoti sukurtąjį kompiuterinį verslo žaidimą („Kietas riešutas“) į formalių ir neformalių studijų mokomuosius modulius, pateikti papildomų integracinių komponentų sąveikos mechanizmus, siekiant juos įgyvendinti tradiciniu ir nuotoliniu būdais, taip pat įvertinti žaidimo priimtinumą studijų procese. Disertaciją sudaro įvadas, keturi skyriai ir paskutinis – rezultatų apibendrinimas. Įvade nagrinėjamas problemos aktualumas, formuluojamas darbo tikslas bei uždaviniai, apra��omas mokslinis darbo naujumas, pristatomi autorės pranešimai ir publikacijos, disertacijos struktūra. Pirmasis skyrius skirtas literatūros... [toliau žr. visą tekstą]

This work is an information system of progress and attendance at Kedainiai Sviesioji gymnasium. This information system will store data – grades and absences from school. It will also include information about schoolchildren and teachers. One of the aims of the informative society development nowadays is to reduce time expenditures. Thus the users of IS would be able to spend more time familiarizing with latest technologies and its perspectives as well as analysing the activity of rivals as in the times of market economy one of the main criteria of prosperous activity is to keep in step with modern technologies. The aim - to project and introduce the information system of progress and attendance. Problems solved: • The problem of progress and attendance record – therefore the grades and absences from school will be entered up. • The function of control – it will enable to control the grades and absences from school. • The function of information storage – it will enable to collect information about schoolchildren (information is constantly renewed and sorted according to particular criteria) and give the accounts that can be viewed or/and printed (the information in database can be also viewed or printed).