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Hydrobiological monitoring of Medard Lake in 2018
Hejzlar, Josef ; Nedoma, Jiří ; Znachor, Petr ; Seďa, Jaromír ; Peterka, Jiří
Presented report summarizes the results of hydrobiological monitoring of Medard Lake in 2018 and recommends further monitoring actions. The year 2018 was the first year after the lake was filled, when no more water from the Ohře River was filled and only small tributaries from the small river basin flowed into the lake. Thus, the ecosystem of the lake has reached a final state in terms of hydrological regime and nutrient load, characterized by very low water exchange, low trophic levels with low productivity of planktonic communities, development of submerged macrovegetation in coastal zones and specific seasonal changes in chemistry and biological parameters.
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Škoda Octavia Super
Netopil, Jan ; Nedoma, Jiří (referee) ; Kaplan, Zdeněk (advisor)
My work contains a comprehensive aggregate of knowledge which is needed for a renovation of a car Skoda Octavia Super. It provides a description of the construction and an execution of a chassis, a transmission, an engine and accessories of the car for individual manufacturing sets, next is a description of a colour execution and a superficial modification. I put emphasis on the identification of all mechanisms and Skoda Octavias accessories (the eighth manufacturing set). The right execution approximates many photographs, a function of the transmission of a functional scheme. All mentioned pieces of knowledge are based on studying of a period literature, a catalogue of spare parts, a contemporary literature and verifying information in the Skoda Octavias museum and in veterans clubs. This work also pays attention to issues of the renovation of the car and its financial demands, options how to use additive technologies during the renovations of cars. In conclusion is evaluated a condition of renovated Octavia Super, year of production 1960, carried out a checking measuring of selected mechanisms and worked out a budget of the renovation. The work brings theoretical knowledge which is needed for returning of the car, Octavia Super, to the state as it was made.
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Locking differential
Odložilík, Daniel ; Nedoma, Jiří (referee) ; Kaplan, Zdeněk (advisor)
The aim of the bachelor thesis is to create research and general evaluation of basic types of locking differentials. Bachelor thesis is divided into four chapters. The first chapter focuses on the design of final drive cases and types of final drives, which are closely related to the differentials. The following second chapter deals with the historical and theoretical basis of differentials. The following third chapter deals with deeper problems of locking differentials, especially description of individual types of locking differentials, including their evaluation. Last fourth chapter is (then) focused on the automotive systems themselves, which use (and improve) the function of open differentials or locking differentials.
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City HPV
Sunek, Ondřej ; Nedoma, Jiří (referee) ; Kaplan, Zdeněk (advisor)
This diploma thesis deals with vehicles that are driven by human power, namely the design of a bicycle frame intended for city traffic. Part of the work is a section that describes the historical development of cycling bikes, as well as an overview of individual bicycle conceptions, focusing on their advantages and disadvantages
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Steam Engine
Koutník, Štěpán ; Nedoma, Jiří (referee) ; Kaplan, Zdeněk (advisor)
The thesis focuses on a steam engine. At first the thesis describes its historical evolution, applications and parts. Consequently, the thermodynamic cycle of the steam engine is analysed. The second part deals with modern applications of the steam engine in automotive industry and others.
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City HPV
Pykal, Vojtěch ; Nedoma, Jiří (referee) ; Kaplan, Zdeněk (advisor)
This bachelor‘s thesis deals with the issue of bicycles for seniors and city traffic with additional electric drive. The introductory part deals with the influence of movement on human health. Further development and technical analysis of bicycles. This is followed by a comprehensive analysis of pedelecs and an outline of an ideal electric bike for seniors. In conclusion, there is my evaluation of this issue.
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You cannot step into the same fishpond twice - an evolution of fishpond ecosystems to hypertrophy
Vrba, Jaroslav ; Benedová, Z. ; Jezberová, Jitka ; Matoušů, Anna ; Musil, M. ; Nedoma, Jiří ; Pechar, L. ; Potužák, J. ; Řeháková, Klára ; Šimek, Karel ; Šorf, M. ; Zemanová, J.
Shallow manmade fishponds in south Bohemia were used for fish production for centuries, however, their ecosystems have changed dramatically due to excessive nutrient loading and fish stocking. Preliminary results of ten sampled fishponds suggested their hypertrophic status at present, while their plankton structure and dynamics reflected the actual size/age class of fish stock consisting predominantly of common carp. Planktivorous fish (both young carp and whitefish) remarkably reduced abundance, size, and species diversity of crustacean zooplankton, in particular large daphnids, whereas larger carp itself did not cause such a strong top-down effect. All other plankton components, i.e. phytoplankton, bacteria, protists, and rotifers showed rather high abundance and diversity, and suggested a reasonable impact of various microbial processes and interactions in the recent hypertrophic ecosystems.
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Hydrobiological monitoring of Medard Lake in 2017
Hejzlar, Josef ; Nedoma, Jiří ; Znachor, Petr ; Seďa, Jaromír ; Peterka, Jiří
The report summarizes the results of hydrobiological monitoring of Medard Lake 2017 and contains recommendations for further research activities. At the beginning of 2017, the lake was almost full, and at the end of March the last 30 cm water column was filled from the Ohře river. The ecosystem of the lake has reached its final nutrient load, which will be characterized by low levels of carrying capacity with low productivity planktonic and fish communities and specific seasonal changes in chemistry and biological parameters.
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The influence of nutrient loading, meteorological and hydrological conditions and operating manipulations on phytoplankton in the water suply reservoir Římov.
Hejzlar, Josef ; Jarošík, Jiří ; Nedoma, Jiří ; Seďa, Jaromír ; Znachor, Petr
Analysis of data collected during long-term and complex limnologic monitoring of the Římov reservoir in the period 1983 – 2015, which depict the development of physico-chemical conditions, hydrology and hydrodynamics of the reservoir with links to biological data on phytoplankton, zooplankton etc. showed that the concentration and species composition of phytoplankton depend on the supply and availability of nutrients, but are also influenced by climatic and hydrological conditions and water management operation of the reservoir.\n
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