Július Štuller

Július Štuller
The Czech Academy of Sciences | AVCR · Institute of Computer Science

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23
Publications
470
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15
Citations

Publications

Publications (23)
Book
This book constitutes the refereed proceedings of the 40th International Conference on Current Trends in Theory and Practice of Computer Science, SOFSEM 2014, held in Nový Smokovec, Slovakia, in January 2014. The 40 revised full papers presented in this volume were carefully reviewed and selected from 104 submissions. The book also contains 6 invit...
Article
Full-text available
Knowledge can be used for description, sorting and searching of useful data. Knowledge, on the other hand, may be very narrowly connected with a person, who may leave a company. Such situation can be avoided by using of ontology as a tool of knowledge engineering or in general as a tool for knowledge representation. The paper presents on ontology d...
Article
The ability to import ontologies safely, that is, without changing the original meaning of their terms, has been identified as crucial for the collaborative development and the reuse of (OWL) ontologies. In this paper, we propose the notion of local safety of an ontology and we identify scenarios in which this notion may be useful in guiding the de...
Article
The technological progress in the areas of the hardware, specially in the field of the (secondary) memories where the ever increasing capacities are paradoxically in the last several years available at ever decreasing prices and smaller physical sizes, and the software, continuously more and more user friendly, efficient and cheaper, together with...
Article
The technological progress in the areas of the hardware, specially in the field of the (secondary) memories where the ever increasing capacities are paradoxically in the last several years available at ever decreasing prices and smaller physical sizes, and the software, continuously more and more user friendly, efficient and cheaper, together with...
Book
The East European Conference on Advances in Databases and Information - stems (ADBIS) is the successor of the annual International Workshops with the same title that during 1993{1996 were organized in Russia by the Moscow ACM SIGMOD Chapter. Initiated in St. Petersburg, Russia, in 1997, it con- nued in Poznan, Poland, in 1998 and in Maribor, Sloven...
Conference Paper
In the paper we give several existence conditions under which different types of inconsistencies can occur in a data warehouse and propose a classification of these inconsistencies based on their sources. Every type of inconsistency can be eliminated, or at least minimized, at various stages of building a data warehouse. We also propose a methodolo...
Article
The technological progress in the areas of the hardware and the software, together with the general expansion of the computers to almost all human activities, make it easier to realize the integration of many already existing databases. Unfortunately the process of the integration of (existing) databases can be accompanied by many various difficult...
Article
Full-text available
The technological progress in the areas of the hardware and the software, together with the general expansion of the computers to almost all human activities, make it easier to realize the integration of many already existing databases. Unfortunately the process of the integration of (existing) databases can be accompanied by many various difficult...
Article
Nour-Omid et al. (1991) proposed an ordered modified Gram-Schmidt (MGS) algorithm, which was supposed to improve the orthogonality state of the solution. Thorough analysis, even of a simple, planar case, shows (Štuller, 1994) that, yet in the exact arithmetic, one cannot expect to obtain — independently of the forward, reverse, or any other type, i...
Conference Paper
Multiple databases may store data about the same slice of the reality. Naturally one may try to get the overall complex information as a result of integrating data from these different databases. And, also naturally, one is immediately facing the problems of the inconsistency (in the sense of the classical logic), which are amplified if one admit t...

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