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Statistical risk analysis of selected companies in regions of the Czech Republic
Veselá, Martina ; Hlavsa, Tomáš (advisor) ; Rudolf, Rudolf (referee)
This thesis mainly deals with statistical analysis of risks in different selected businesses
in Czech Republic, when the primary data are obtained through a questionnaire survey for
the following statistical analysis, where frequency, mean and variability are used. The work
confirmed the hypothesis of the occurance of differences in risk perception depending on the
branch of business and also on the region. The conclusions could be used by new emerging
companies, that through this thesis might be able to orientate themselves in risks analysis,
specifically in their branch of business and the region.
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Evolution of mobile devices and their utilization
Němec, Ondřej ; Jarolímek, Jan (advisor) ; Rudolf, Rudolf (referee)
This thesis is focused on the development of mobile devices and their usage. The thesis gives basic overview of mobile phones, including their historical development. It also contains an analysis of the condition and the possibility of utilization of these devices. There are mentioned currently best selling phones and their operating systems. In the practical part, there is a model of decision situation that turns up when choosing a mobile phone and also when choosing a mobile operating system. There is also compared the state of usage of mobile devices in the Czech Republic and in the world from several aspects, including the comparison of sales of the particular manufacturers and sales of operating systems.
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Influence of the substrate treatment and the temperature on development of the Pleurotus eryngii and Pleurotus nebrodensis culture
Otradovcová, Šárka ; Jablonský, Ivan (advisor) ; Rudolf, Rudolf (referee)
Objective of this diploma thesis was to select the most appropriate composition and thermal treatment of a substrate and the optimal temperature for planting and development of the sporocarps of mushrooms Pleurotus eryngii and Pleurotus nebrodensis.
Within the objective of this thesis there was a hypothesis that different levels of the thermal treatment of a substrate have an impact on the colonization of such substrate by mycelium and subsequent crop of sporocarps Pleurotus eryngii and Pleurotus nebrodensis and that within those selected strains there can be found a strain which tolerates temperatures in a grow room above 15 °C.
Straw pellets, beech sawdust, spruce sawdust and Douglas tree sawdust were selected as substrates for the growth of sporocarps P. eryngii and P. nebrodensis. Some substrates were enhanced by a wheat bran or coniferous sawdust was fermented without and with 5% fugate.
Obtained data were statistically processed using the Statistica (StatSoft) programme by the ANOVA method. Statistical assessment of results is presented graphically in the thesis.
Results of the experiment proved that Pleurotus eryngii and Pleurotus nebrodensis have the highest growth of their sporocarps on the substrate from fermented coniferous sawdust with added fugate.
The results further shown that the mushrooms had higher growth when they were on the substrate without a wheat bran compared to the substrate with a wheat bran, which was even more prone to its contamination.
Optimal temperature for planting and development of the sporocarps Pleurotus eryngii was determined to be 12 - 15 °C. There were significant differences in the fructification of P. eryngii and P. nebrodensis which produced only minimal crop. Duration of a growing cycle of Pleurotus eryngii was 72 - 134 days. Development of sporocarps lasted 11 - 21 days.
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