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Design of application for automated extraction of products attributes from Web sites
CHVOSTOVÁ, Petra
This thesis deals with the so-called web scraping, specifically showing a possible way to extract product data from the web and web pages on a chosen example. The theoretical part is devoted to the description of the website and its source code. In order to download data, you first need to understand these information. Next, the R language environment and some methods, which are subsequently used in the practical part during web extraction, are introduced. The practical part contains procedures (analysis and design) for the creation of the tool used for scraping. Data is downloaded from a specific e-shop, and its extraction success is checked. The last part is dedicated to comparing the functionality of the created tool on another e-shop.
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Bitcoin - history, present, and prognoses
CHVOSTOVÁ, Petra
The aim of this thesis is to familiarize the reader with the problematics of the theoretical background of cryptocurrencies from the historical perspective, focusing on the concepts of B-money and Bit gold, which were the basis for the creation of Bitcoin. The main part is devoted to this decentralized cryptocurrency called Bitcoin. It introduces Bitcoin's main milestones, the Bitcoin Foundation, the functioning system itself, and eventually Bitcoin's prospects for the future. The aim of the second part of this thesis is to develop a simple and clear system for selecting a wallet as the storage of bitcoins. What should be decided by a person who considers holding his own bitcoins. Here is used a compairing method of selected criterias. Criterias are compared based on the prerequisite that the priority for selection is mainly the bitcoin wallet. For the idea of how this wallet looks and works, the practical part also includes a sample of two selected wallets, based on the comparison of criterias, and the transfer of one dollar between them. The aim of this bachelor thesis is to process the comparation of selection procedur for use by ordinary users.
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