|
|
Voltage tests under wet condition
Vondrák, Michal ; Štěpánek, Jaroslav (referee) ; Krbal, Michal (advisor)
The main objective of presented thesis is to design a shower system in order to extend voltage tests by voltage wet testing. The introduction focuses on important aspects related to voltage wet testing. Such aspects originates mainly from Czech but also foreign standards. Following part of the thesis deals with specific wet testing design proposals, which fulfil the standards requirements. The final part of presented thesis is focused on partial experiments. Namely the analysis of rain water properties, behavior of rain drops exiting the nozzle with varying flow and nozzle angle, wet test on insulator in dry and wet conditions.
|
|
|
Mpembův jev
Doležel, Daniel ; Prinz, František (referee) ; Mauder, Tomáš (advisor)
This thesis focuses on so far not cleared up anomaly of water called the Mpemba effect. This term is used for observation of hot water freezing faster than cold water under the same cir-cumstances. By researching dominantly English written scientific publications from last few decades, a complete overview of the whole problem was compiled, which should introduce the nonsense seeming effect, its possible explanations and possible utilization to the reader. Even though several good theories on explaining the Mpemba effect exist, the members of scientific community still have not found an agreement on any of them. Therefore, the search for explanation continues. So far there is no room for enthusiastic or disappointed conclusions as there is no bulletproof theory in sight which would also bring light on possible exploitation of the effect. On the contrary, it seems like the scientists do not seem to converge on a single conclusion, but new theories are popping up introducing new domains of the research.
|
|
|
Mpembův jev
Doležel, Daniel ; Prinz, František (referee) ; Mauder, Tomáš (advisor)
This thesis focuses on so far not cleared up anomaly of water called the Mpemba effect. This term is used for observation of hot water freezing faster than cold water under the same cir-cumstances. By researching dominantly English written scientific publications from last few decades, a complete overview of the whole problem was compiled, which should introduce the nonsense seeming effect, its possible explanations and possible utilization to the reader. Even though several good theories on explaining the Mpemba effect exist, the members of scientific community still have not found an agreement on any of them. Therefore, the search for explanation continues. So far there is no room for enthusiastic or disappointed conclusions as there is no bulletproof theory in sight which would also bring light on possible exploitation of the effect. On the contrary, it seems like the scientists do not seem to converge on a single conclusion, but new theories are popping up introducing new domains of the research.
|
|
|
Voltage tests under wet condition
Vondrák, Michal ; Štěpánek, Jaroslav (referee) ; Krbal, Michal (advisor)
The main objective of presented thesis is to design a shower system in order to extend voltage tests by voltage wet testing. The introduction focuses on important aspects related to voltage wet testing. Such aspects originates mainly from Czech but also foreign standards. Following part of the thesis deals with specific wet testing design proposals, which fulfil the standards requirements. The final part of presented thesis is focused on partial experiments. Namely the analysis of rain water properties, behavior of rain drops exiting the nozzle with varying flow and nozzle angle, wet test on insulator in dry and wet conditions.
|
|
|
Structural and hydrological characteristics of weathering pits in Česká Kanada
KUBOVÁ, Alena
This Masetr thesis looks into weathering pits of nature park Česká Kanada. The theoretical part of the thesis investigates research of weathering pits done in the Czech Republic as well as abroad. The practical part deals with weathering pit-bearing as well as weathering pitabsent blocks of rock within the study area. It describes their geological-geomorphological environment and attempts to find differences between the weathering pit-bearing and absent blocks (the presence of cracks, altitude, landforms, shape of the rock block and more). Furthermore it was established that a suitable rock block morphology (respectively the existence of horizontal plane) is important for formation of weathering pits. It also studies water properties in selected weathering pits, relationship of overhangs to prevailing wind directions. A correlation between overhang and wind direction was found in sense that NW to W winds correspond with overhang formation on eastern sides of weathering pits. Water in weathering pit of Čertův kámen located in sunny bare landscape shows significantly different properties in comparison with water properties of remaining weathering pits located in forrested areas.
|
guest ::
