Browsing by Author "Řimnáč, Martin"

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    Automated incremental building of weighted semantic web repository
    (Springer Verlag, 2009-01-01) Řimnáč, Martin; Špánek, Roman
    The chapter introduces an incremental algorithm creating a selforganizing repository and it describes the processes needed for updates and inserts into the repository, especially the processes updating estimated structure driving data storage in the repository. The process of building repository is foremost aimed at allowing the well-known Semantic web tools to query data presented by the current web sources. In order to respect features of current web documents, the relationships should be at least weighted by an additional indirect criteria, which allow the query result to be sorted accordingly to an estimated quality of data provided by web sources. The relationship weights can be based on relationship soundness or on the reputation of the source providing them. The extension of the relationships by the weights leads to the repository able to return a query result as complete as possible, where (possibly) inconsistent parts are sorted by the relationships weights. © 2009 Springer-Verlag Berlin Heidelberg.
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    Design of an ontology for humin substances
    (2012-01-01) Tyl, Pavel; Řimnáč, Martin; Špánek, Roman; Štuller, Július
    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 design to peculiarities of humin substances based on analysis of existing similar type ontologies. It enables to preserve, make accessible and reuse gained experiences, for instance for design of functionally rich, flexible and easy integrable systems and applications. In introduction this work presents an overview of selected formalisms for interception of data structure and processes in humin substances area with respect to using ontologies and their possibilities. The paper is especially a case study of ontology application for evidence and data organization of humin substances, their measurement and experimentations, where use of ontologies is not yet common. It shows a potential of ontologies and illustrates parameters of generally applicable model for such area. © 2012 ACM.