National Repository of Grey Literature 4 records found  Search took 0.00 seconds. 
Ergonomic design principles by machine tools
Doležal, David ; Blecha, Radim (referee) ; Blecha, Petr (advisor)
This Bachelor thesis is focused on ergonomics requirements for machine tools designing. Thesis includes descriptions of legislative descriptions of EU and Czech Republic, which are related to the ergonomics. Analysis of ergonomics requirements was performed like a part of the thesis. The main standards are detailly described in the thesis and also are mentioned other related sources, which are related which ergonomics..
Simulation of heat transfer in the program COMSOL Multiphysics
DOLEŽAL, David
This bachelor thesis deals with the study of heat conduction in solids and the creation of a model in the commercial program COMSOL Multiphysics. The work is divided into five thematic units. The first part deals briefly with the meaning and characteristics of both the program and the heat transfer module. Heat, as one form of energy, accompanies all the physical processes we can encounter and is an integral part of our lives. In this connection, the basic physical mechanisms of heat transfer, such as conduction, flow and radiation, are presented in the second part. Attention is also paid to physical variables, theories and concepts whose knowledge is necessary to investigate heat transfer mechanisms. The third part of the thesis is devoted to the experiment, consisting in the observation of temperatures of heated materials by a thermal camera. In the fourth part of the thesis are first described in general the steps accompanying the production of the model and subsequently production of a particular model in the program itself. The last part of the thesis is devoted to comparing experimental results with data from the model.
Organical chemicals from biomass
DOLEŽAL, David
This bachelor thesis deals with the processes of biomass as a renewable resource for the production of chemicals that could compete chemicals obtainable from fossil sources. Processing of biomass can be divided into two main approaches namely a thermochemical and biotechnological processing of biomass processes. This processing involves many processes such as hydrolysis, crushing, fermentation, combustion or high temperatures and pressures, and many other thermochemical or biotechnological processes associated with the nature of the structure of the biomass. As the most important products of biomass processing can be considered biofuels represented in my work mainly by ethanol, but also methanol and other organic chemicals such as furfural, levulinic acid and hydroxymethylfurfural derived from the processing of C5 and C6 sugars located in the fundamental structure of biomass. These organic chemicals can also serve as a chemical platform and subsequent modifications of them can get products with the same or very similar properties of the products of the petrochemical industry.

See also: similar author names
3 Doležal, Daniel
4 Doležal, David
Interested in being notified about new results for this query?
Subscribe to the RSS feed.