Auswahl der wissenschaftlichen Literatur zum Thema „Výkonové charakteristiky“

Rešeršní článek představuje metodu oční kamery a její využití ve výzkumech ve fyzikálním vzdělávání. Oční kamera se poměrně často využívá ve výzkumu marketingu, medicíně, výzkumu čtení, vzdělávání sportovců apod.; v oblasti fyzikálního vzdělávání je použití této výzkumné metody poměrně vzácné. Článek uvádí přehled pěti studií, které se zaměřily na přístupy žáků při řešení úloh z mechaniky nebo elektřiny a magnetismu. Navíc uvádí jednu studii z oblasti vzdělávání v biologii. Metoda byla použita jak pro kvalitativní, tak pro kvantitativní typ výzkumu. Nejčastěji byly porovnávány charakteristiky očního zkoumání vizuálního materiálu pro výkonově různě úspěšné skupiny žáků. Zkoumáni byli studenti převážně z VŠ v počtu 11-43. Získané výsledky naznačují několik rozdílů v přístupu mezi žáky s horším a lepším výkonem. Limity metody jsou uvedeny v závěrečné části.

This diploma thesis deals with the problematics of fan cooling towers. The very first part of the text is research, focusing mainly on the theory of cooling and the function of fan cooling towers in general. The following chapter deals with the water resource management of the Dukovany nuclear power plant and the specification of its objects of forced draft cooling towers. The second part describes a computational model created to determine the cooling performance of these towers under the given input conditions. In the following chapters, the results from the computational model are compared with the available data from warranty measurements and with the provided characteristics. The final pages deal with the study of the influence of changes in input parameters on the cooling performance and the research of the behavior of the cooling towers under extreme weather conditions.

The aim of this diploma thesis is to analyse flight performance of airplane VUT-081 Kondor. The first part focuses on determination and estimation of aerodynamic characteristics of the airplane. Based on this data flight performance was calculated and evaluated according to CS-ELSA. The last part is dedicated to comparison of flight performance of VUT-081 Kondor with other similar airplanes.

The diploma thesis deals with factors that directly or indirectly affect the operation of the airport. The thesis contains theoretical notes of influencing factors, a list of aircraft and their characteristics, including mutual comparison in graphs. The next part focuses on the airport itself, where it tries to identify the factors that affect its operation, including historical events. The next part focuses on the selection of airports in Central Europe, determining the appropriate performance characteristics, which are then compared and evaluated.

Hydrogen, as a form of storage for the excess energy from renewable sources, is a technically and economically viable option. However, the technology is not mature enough to compete with the other renewable energy possibilities. In this thesis, a study based on coupling two 330 kW wind-turbines with an NELP. 40 electrolyzer this connection should improve the utilization of wind power. In this thesis are two options of energy utilization. The energy produced by the wind-turbine is stored in the form, of hydrogen and is then delivered for consumption at variable power through a fuel cell, second option is use of produced hydrogen as alternative fuel for cars. This study is a general introduction for the wind energy system with hydrogen storage. Future studies should be more complex and detailed in order to understand and model the system with greater accuracy and to increase the possibility for the utilization of wind energy to generate hydrogen. This would enhance wind power competitiveness and sustain the continuously changing world energy demands.