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Values perceived by players in Czech rugby compared to the stated values of the sport
Pospíšil, Jakub ; Crossan, William Morea (advisor) ; Bednář, Miloš (referee)
6 Abstract: Title: Values perceived by players in Czech rugby compared to the stated values of the sport Objectives: This bachelor's thesis aims to determine how rugby players perceive rugby values in themselves and their surroundings. Another objective was to identify trends in the responses using statistical tools. The third objective was to look for deviations from rugby values and their sources. Methods: In the practical part of this bachelor's thesis, a quantitative research method, specifically the questionnaire method, and a qualitative method, specifically the semi- structured interview method, were used. The respondents of the quantitative research are players who play in the Czech Extraliga. The respondents of the qualitative research are selected coaches from clubs that play in the Extraliga. Results: Czech rugby actively strives to honor the values that define this sport. However, the results clearly show that there are problems in some areas. Players have issues with discipline, and although they rated themselves positively, coaches perceive a lack of passion in their teams. Keywords: values, rugby, fair play, training
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THERMAL DECOMPOSITION OF SOLID BIOFUELS AND ASSOCIATED FINE PARTICLE GENERATION
Sitek, Tomáš ; Ličbinský, Roman (referee) ; Svěrák, Tomáš (referee) ; Pospíšil, Jiří (advisor)
Despite otherwise indisputable advantages, biomass burning is associated with significant emissions of fine particles. The different behavior of dissimilar types of biomass during thermal decomposition can be explained to some extent by the different composition, i.e. the different content of cellulose, hemicellulose and lignin. The main aim of this work was to find the emission characteristics of these three components during heating in a thermogravimetric analyzer. The monitored parameters were the heating rate and the oxygen content in the combustion atmosphere. The output is the dependence of the sample mass and also the corresponding distributions of particles on the temperature. The results show considerable differences between the individual samples, but in general the pyrolysis of cellulose produces the highest particle emissions. Higher oxygen content in the combustion atmosphere and lower heating rates cause earlier sample decomposition and reduce particulate emissions. This is followed by an evaluation of the transferability to a sample of a real biomass based on its known composition using a simple weighted arithmetic mean. Useful information on particle sampling and electron microscope visualization, supplemented by images of particles from the pyrolysis of selected samples can also be found in this work.
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Optoelectronic application of perovskite nanoparticles
Ambro, Filip ; Zdražil,, Lukáš (referee) ; Pospíšil, Jan (advisor)
This bachelor thesis deals with the utilization of perovskite nanoparticles in optoelectronics. The thesis is composed of three main parts. The first part focuses on the theoretical properties of perovskite materials, with an emphasis on their structure and properties influencing their electrical and optical behavior. The second part describes the procedure for preparing solutions of these nanoparticles, their subsequent characterization, the preparation of thin layers, and the subsequent characterization of the optical, electrical, and dielectric properties of these layers. The final part is dedicated to presenting the results of the work and discussion.
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Aerosol particles morphology
Odehnalová Šamanová, Jaroslava ; Linda, Jakub (referee) ; Pospíšil, Jiří (advisor)
This thesis focuses on airborne Particulate Matter (PM), the floating dust that surrounds human beings every day, its composition, morphology, size and concentrations in the air. The first, introductory part of the thesis, describes the basic concepts, properties and health risks associated with aerosol particles, and relevant legislation. The second, experimental part of the thesis, describes the instruments used, followed by the results of emission sampling and immission sampling, and a comparison of measured concentrations in three selected locations: in a village, in a city, and in a family house. The third part, the analysis, investigates freely available air pollution immission monitoring data, including long-term data, data from occasional events such as New Year’s fireworks, or sporadic occurrences such as a forest fire in České Švýcarsko national park. The conclusion summarises the achieved results, and the appendix consists of a catalouge of dust particles, in which all emission samplings carried out within the experimental part of the thesis are listed.
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Proposal for the Extension of the Functionality of Electronic Shelf Labels for the Improvement of Communication with Customers
Petýrková, Pavlína ; Pospíšil, Jan (referee) ; Chlebovský, Vít (advisor)
The topic of this thesis is a proposal to expand the functionalities of electronic shelf labels to enhance communication with customers. The thesis is divided into three parts – theoretical, analytical, and proposal. The theoretical part is based on professional literature and is crucial to a deeper understanding of the issue. It also serves as a basis for the analytical part. In its introduction the company DATART is presented. The analytical part then deals with answering partial research questions interviews, questionnaire survey and observation. Based on the results of the analysis, the proposal part develops proposals focusing on specific measures and strategies that will meet the defined objectives.
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Using of Perovskite Nanoparticles in Biochemistry
Srncová, Melanie ; Tumová, Šárka (referee) ; Pospíšil, Jan (advisor)
This bachelor's thesis examines study of the properties of lead halide perovskite nanoparticles and their use in biochemistry. The synthesis of two types of perovskite nanoparticles MAPbBr3 and MAPbCl3 was performed using the LARP method. During the synthesis was observed the influence of the mixing length of the precursors on the properties of these solutions, which were characterized using UV-VIS spectrophotometry, fluorescence spectrometry and dynamic light scattering. A discussion of the obtained results was carried out along with a discussion of the suitability of using these perovskite nanoparticles in biochemistry due to the toxicity of the lead that these nanoparticles contain.
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Dispersion of particulate matter pollution from electric vehicles in urban areas using CFD
Lipka, Jakub ; Pospíšil, Jiří (referee) ; Linda, Jakub (advisor)
There is an opinion across the society, that electric vehicles (EV) are emission-free alternative to vehicles using internal combustion engines (ICEV). This is not true. Although electric vehicles do not produce emissions connected to internal combustion, they still produce non-combustion emissions that are emitted into surrounding air. Non-combustion emissions in question are brake wear particles (BWP), tire wear particles (TWP) and road wear particles (RWP). These emissions, due to EV’s greater mass, tend to be higher compared to ICEVs. Therefore, in this thesis, model of dispersion of non-combustion emissions generated by EVs was created using CFD consisting of two models – airflow model around EV and particle dispersion model. It was found that those emissions are captured and distributed by airflow, mainly thanks to vortices generated in the wake zone behind the vehicle. Those particles can be suspended up to 1,9 m into the air and up to 2,5 m laterally away from the vehicle. Thanks to that there is a risk of pedestrian inhaling air with high concentration of those particles in places near roads like pavements.
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Model of electric charge transport in perovskites and their precursors
Raška, Vilém ; Pospíšil, Jan (referee) ; Zmeškal, Oldřich (advisor)
Thesis focuses on analysis and determination of basic electric properties of perovskite materials. Thesis includes theoretical section which discusses electric properties and charge transport in solid materials. In the experimental section several chloride and boride perovskite material samples are used for measurement of VA characteristics and Impedance Spectroscopy. Then based on acquired data multiple models are created which are then used to determine required properties and state distribution of samples.
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Evaluation of real PV system operation
Macák, Vít ; Gregorovičová, Eva (referee) ; Pospíšil, Jiří (advisor)
This bachelor thesis covers photovoltaic systems, their various configurations and main components. It analyses a specific installation on a single-family house, evaluating the operational data and the economic return of the system. The thesis also provides recommendations for future operations and system expansion options.
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Multi-stage impactor
Kojecký, Dalibor ; Sitek, Tomáš (referee) ; Pospíšil, Jiří (advisor)
This master’s thesis is focused on the problem of laboratory capture of fine particles by the impaction method. The introductory chapter is devoted to the investigation of fine particles in air and the impact of air pollution on humans and the environment. The second chapter intro-duces the history of impaction devices, describes the principles of the cascade impactor, and explains the theory behind fine particle capture by changing the direction of the airflow carrying the particles and their capture when they hit a solid wall. In the practical part of the thesis, a computational procedure is developed using the Python programming language for a custom design of a multi-stage impactor. The parameters obtained from the developed computational software are compared with those of a commercial impactor available at the faculty of the school. According to the developed computational procedure, a custom multi-stage impactor is designed for particle separation in the range of PM0.5 to PM0.1.
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