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Automatic elevation and azimuth measurement system
Večeřa, Jindřich ; Kasal, Miroslav (referee) ; Záplata, Filip (advisor)
This bachelor´s thesis deals with an automatic elevation and azimuth measurement system, which will be used for antenna positioning. It is realized by using magnetometer and accelerometer. Important part of the system is tilt compensation and calibration for selected location. This system will send data to PC and also display them on LCD display. This project contains theory of measured quantities, method choice, component choice, realization of wiring, PCB design, programming device, testing device and accuracy determination.
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Servomechanical movement control of photovoltaic panel
Uher, Ondřej ; Voldán, Jiří (referee) ; Němec, Zdeněk (advisor)
Thesis deals with the introduction to the production of electricity using photovoltaic panels and the relative position between panels and the Sun. The project aim was to design equipment to ensure the vertical position of the solar panels towards the Sun during the day so as to achieve maximum energy gain from sunlight. Pointing mechanism will be governed by the date and time.
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Reproductive strategies of flowering plants in Afromontane grasslands along an elevational gradient on Mount Cameroon
Anýž, Dominik ; Tropek, Robert (advisor) ; Münzbergová, Zuzana (referee)
in English Montane conditions represent a relatively unfavorable climate for most plants and their pollinators. Consequently, zoogamous plant species growing at high elevations are expected to be pollen limited. According to the "reproductive assurance" and "transmission advantage" hypotheses, such pollen-limited plants will adapt more toward self-pollination than plants in communities with more reliable pollination. To test such predictions, I studied reproduction strategies and pollen limitation of ten zoogamous plant species at three elevations (2,800 m a.s.l. 3,500 m a.s.l. and 4,000 m a.s.l.) in montane grasslands on Mount Cameroon, West/Central Africa. I compared seed sets produces by plants with four treatments in our extensive hand-pollination experiments: autogamy, geitonogamy, outcrossing, and natural control. One experimental species was found to be self-incompatible, six species were partially self-compatible, and one was completely self-compatible and predominantly selfing. In five of these plant species, I compared the reproduction strategies and pollen limitation among the elevations. I found that pollen limitation did rise in two species, we expect this to be due to the fact that the species were already pollen limited at 2,800 m a.s.l. Contrary to the two hypotheses, selfing did...
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The influence of windthrow disturbance on soil characteristics in chosen river source areas of Šumava mountains
Halešová, Julie ; Šefrna, Luděk (advisor) ; Freyerová, Kateřina (referee)
The influence of windthrow disturbance on soil characteristics in chosen river source areas of Šumava mountains Abstract The aim of this thesis is to summarize informations about disturbance of development of the ecosystem or landscape. One of the many types of disturbances is windthrow, which can be seen in forests all around the world. The practical part of my work had its place in the Šumava National park, Rokytka basin, where changes in the physical and chemical characteristics of soil after windthrows were studied. Those characteristics are soil texture, soil reaction, colour and moisture. According to our results, there is a significant influence of windthrow on soil characteristics and also differences between pits and mounds. There is a clear impact on soil horizons too. A strong water retention can be expected due to the topmost peat horizon, which is not typical feature of lokal soil. Key words: disturbance, windthrow, soil, pit, mound.
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Automatic elevation and azimuth measurement system
Večeřa, Jindřich ; Kasal, Miroslav (referee) ; Záplata, Filip (advisor)
This bachelor´s thesis deals with an automatic elevation and azimuth measurement system, which will be used for antenna positioning. It is realized by using magnetometer and accelerometer. Important part of the system is tilt compensation and calibration for selected location. This system will send data to PC and also display them on LCD display. This project contains theory of measured quantities, method choice, component choice, realization of wiring, PCB design, programming device, testing device and accuracy determination.
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Servomechanical movement control of photovoltaic panel
Uher, Ondřej ; Voldán, Jiří (referee) ; Němec, Zdeněk (advisor)
Thesis deals with the introduction to the production of electricity using photovoltaic panels and the relative position between panels and the Sun. The project aim was to design equipment to ensure the vertical position of the solar panels towards the Sun during the day so as to achieve maximum energy gain from sunlight. Pointing mechanism will be governed by the date and time.
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