World Wide Web affects the new areas of business as it occurs in our lives more and more often. The term "site" becomes well-known and important for the employers and the Internet advertisement more popular since the commercial sites’ visitors are potential clients of the enterprises and institutes. It is noticed that Internet projects often fail: despite of the site is fine, functional and has a lot of useful information, the result is useless or it does not corresponds to its purposes. This happens because of the very simple reason: nobody knows about the site! Among thousands of sites which can be found by the search engine the user can overview and evaluate only few of the search results. Sooner or later sites’ owners find out this fact, and they question themselves: “Why not my site is placed in the first search engine result page?” Moreover, the site’s theme completely corresponds to the query, and the quality of content is fine and even better than the one of competitors. The answer exists: the site is not optimized for the search engines. The main purpose of the paper is to analyze, select and apply in practice the effective search engine optimization strategies and methods. The main contribution of the paper is the detail description of information dynamics and its structure, research of the world popular search engine’s Google work principles and also other search engines’ and directories’ functional peculiarities, analysis of the page ranging algorithms. The... [to full text]

Šiame darbe buvo išanalizuota keletas paieškos sistemų, bei įvardinti jų privalumai bei trūkumai. Palygintos sistemos kūrimo technologijos. Tai įvertinus buvo sukurta informacijos paieškos sistema elektroninėje bibliotekoje (eLABa). Jos pagrindinis privalumas yra tai, kad paieška vykdoma ne tik tarp dokumento metaduomenų (aprašo), bet ir dokumento tekste. Eksperimentiškai buvo nustatytas galimas paieškos vykdymo optimizavimas. / This system is invented to help people search for the e. documents in FEDORA repository. The system has following features: indexing of Fedora FOXML records, including the text contents of data streams and search in the index. There is possibility to registered users to save results in the history page, and to do repeated search if you want. Also you can go directly to e. document after you have made search.

Šiuo metu informacija yra sukaupta paskirstytuose šaltiniuose, kurie kaip saugojimo priemonę naudoja duomenų bazes. Šios bazės yra skirtingų tipų. Vartotojo tikslas yra naudoti keletą nepriklausomų informacijos šaltinių kaip vieną. Dėl savo nepriklausomumo nuo DBVS ir platformos tipo, XML tapo ypatingai naudingas atviroms susisiekiančioms sistemoms, kuomet duomenys apsikeičiami tarp paskirstytų duomenų šaltinių. Šiame darbe pateikiamas ontologijų, kaip dalykinės srities apibrėžimo informacijos paieškai, panaudojimas. Tai leidžia optimizuoti reikiamos informacijos paieškos procesą ir išvengti užklausos rezultatų pertekliškumo. / The main problem in heterogeneous database integration is data incompatibility in different databases. XML is perfect solution in data exchange between different databases as it is independent from OS, applications or hardware. To implement XML in data exchange XML must be created corresponding to the databases. This work propose use of ontologies for information retrieving from heterogenous data bases. Such method let optimize user query to avoid wasted information.