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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Classification of electronic documents using cluster analysis
 Ševčík, Radim ; Řezanková, Hana (advisor) ; Svátek, Vojtěch (referee)
The current age is characterised by unprecedented information growth, whether it is by amount or complexity. Most of it is available in digital form so we can analyze it using cluster analysis. We have tried to classify the documents from 20 Newsgroups collection in terms of their content only. The aim was to asses available clustering methods in a variety of applications. After the transformation into binary vector representation we performed several experiments and measured the values of entropy, purity and time of execution in application CLUTO. For a small number of clusters the best results offered the direct method (generally hierarchical method), but for more it was the repeated bisection (divisive). Agglomerative method proved not to be suitable. Using simulation we estimated the optimal number of clusters to be 10. For this solution we described in detail features of each cluster using repeated bisection method and i2 criterion function. In the future focus should be set on realisation of binary clustering with advantage of programming languages like Perl or C++. Results of this work might be of interest to web search engine developers and electronic catalogue administrators.
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VZTAH INDEXU EKONOMICKÉ SVOBODY K INDEXU VNÍMÁNÍ KORUPCE
 Ševčík, Radim ; Vrabec, Michal (advisor) ; Průša, Milan (referee)
The aim of this bachelor work is to estimate the dependency on corruption of economic freedom. Firstly, the theoretical backgrounds of both economical phenomena are examined. Then, the relationship between the economic freedom of the World Fraser Institute and the Corruption Perceptivity Index by Transparency International is discussed, using regression techniques and correlation analysis.
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See also: similar author names
12 ŠEVČÍK, Radek
4 ŠEVČÍK, Richard
4 ŠEVČÍK, Richard
12 Ševčík, Radek
5 Ševčík, Roman
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