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Video Retrieval
Černý, Petr ; Mlích, Jozef (referee) ; Chmelař, Petr (advisor)
This thesis summarizes the information retrieval theory, the relational model basic and focuses on the data indexing in relational database systems. The thesis focuses on multimedia data searching. It includes description of automatic multimedia data content extraction and multimedia data indexing. Practical part discusses design and solution implementation for improving query effectivity for multidimensional vector similarity which describes multimedia data. Thesis final part discusses experiments with this solution.
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Moving Objects Indexing
Křížová, Martina ; Ráb, Jaroslav (referee) ; Zendulka, Jaroslav (advisor)
This thesis deals with indexing of spatio-temporal data. It describes existing approaches to indexing data and support for indexing in Oracle Database 11g. The aim of this work is to design structures of databases for storing spatio-temporal data over Oracle Database 11g to propose experiments for these databases. Ways of spatio-temporal data storage are evaluated according to these experiments in terms of time demands of queries and appropriateness of using available indexing structure and spatial operators.
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Video Retrieval
Černý, Petr ; Mlích, Jozef (referee) ; Chmelař, Petr (advisor)
This thesis summarizes the information retrieval theory, the relational model basic and focuses on the data indexing in relational database systems. The thesis focuses on multimedia data searching. It includes description of automatic multimedia data content extraction and multimedia data indexing. Practical part discusses design and solution implementation for improving query effectivity for multidimensional vector similarity which describes multimedia data. Thesis final part discusses experiments with this solution.
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Examination and measuring of Oracle database system b-tree index inefficiency
Klepetko, Vítězslav ; Macák, Petr (advisor) ; Palovská, Helena (referee)
This thesis describes the Oracle database b-tree index and compares it to the concept of a b-tree as a graph theory structure. It analyses main factors causing inefficiency in b-tree index which emerge during DML queries execution. It shows to what extent the inefficiency manifests and describes ways of dealing with it. For the purpose of index mechanism analysis a method called block dumping is used. The level of inefficiency is determined by measuring queries duartion in a database created for that purpose. Inner fragmentation of index database block, segment fragmentation and high value of clustering factor are identified as main inefficiency-causing factors.
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