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Piston for 373kW 4-stroke SI-engine
Kovář, Pavel ; Svída, David (referee) ; Dundálek, Radim (advisor)
This bachelor work deals with the design of a piston for 373 kW 4-stroke SI-engine. The work is focused to main dimensions of the piston, to make it able to work in difficult conditions, which is exposed at cylinder. One of the most important part of design piston is strength calculation.
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Technology of Receiving of Very Weak Signals from Interplanetary Spacecrafts
Špaček, Jiří ; Bezoušek, Pavel (referee) ; Kovář, Pavel (referee) ; Kasal, Miroslav (advisor)
The work deals with the problematics of receiving very weak radio signals and it is focused especially on systems for low rate telemetry with carrier-subcarrier modulation. The part of this work is dedicated to calculation the link budget of typicall telemetry data transmission system between the Mars and the Earth in respect of the receiving equipment, which could be developed in the Experimental sattelites laboratory on the Institute of radio electronics BUT. The main part of this work is dedicated to developing and testing the low rate telemetry data transmission system model. The model is developed for the purpose of study the effects of AWGN and phase noise on the whole system and also on its component parts. The model has been developed and described in the way of easy parameters modification. The design for each parameter of the model is described carefully. With the developed model, the study of the effects of AWGN and phase noise on the whole system and also on its component parts has been performed.
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Evaluation of the Business Financial Situation and its Information System Support
Ševčíková, Michaela ; Kovář, Pavel (referee) ; Jakubcová, Marie (advisor)
This bachelor´s thesis deals with the evaluation of the financial situation KOVOSTEEL, Ltd. with using its own program in Visual Basic. Reviews financial situation is achieved by using selected techniques of financial analysis. The basis for the processing of financial analysis firm became the financial statements for the period 2005 – 2009.This thesis is divided into two parts. The first section describes the theory of financial analysis and the second part shows practical using of the financial analysis firm KOVOSTEEL, Ltd. The results of identified financial analysis are proposed measures to improve the current financial situation.
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Control of asynchronous motor by PowerFlex drive
Kovář, Pavel ; Bradáč, Zdeněk (referee) ; Štohl, Radek (advisor)
The Thesis deals with the basic principles of function of Asynchronous motor. It also describes Frequency invertor PowerFlex 700 and PLC ControlLogix from the company Allen Bradley, and marginally industrial network ETherNet/IP. The main part of this project is control of asynchronous motor in aid of frequency invertor. As an example of this control in this Thesis is used control of production line for drilling holes into the metal beams. Unfortunately, its activity is only simulating, because of this production line does not exist physically. The main problem of control of this production line is undoubtedly the control of asynchronous motor on correct location. The task of production line was designed with regard to using as a laboratory task for teaching. The last part of this Thesis deals with the animated visualization of this production line in the program FactoryTalk View Studio, which is possible to record to display terminal, which is designated for visualization in industry.
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The municipality as an actor in environmental protection from a law perspective
Kovář, Pavel ; Fabšíková, Tereza (advisor) ; Sobotka, Michal (referee)
The municipality as an actor in environmental protection from a law perspective Abstract Municipalities in the Czech Republic are entrusted with a number of very important and irreplaceable roles in protecting the environment, both within their independent competence and in activities carried out under delegated competence. In the first half of the text, the author defines the basic concepts in the form of the term municipality and the term environment. At the same time, in the first part of the thesis, the author analyses the constitutional-legal basis of local self-government units, more precisely municipalities, their characteristic features and the differences between the independent and delegated competence of municipalities. The second part of the thesis is devoted to the already mentioned definition of the environment, environmental law as a distinct and dynamically developing branch of public law, and legal instruments serving to protect the environment, including their division and examples. In the third part of the thesis, the author focuses on the individual activities carried out by municipalities under delegated competence in the field of air, water, soil, forest, nature and landscape protection or waste management. The fourth part of the thesis contains a list of activities carried out by...
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Millimeter Wave Band Wireless Channel Measurement Techniques in Automotive Applications
Vychodil, Josef ; Kovář, Pavel (referee) ; Masopust, Jiří (referee) ; Derbek, Vojtěch (advisor)
Tato disertační práce se zabývá metodami měření přenosových kanálů v pásmu milimetrových vln se zaměřením na automobilové aplikace. Po stručném úvodu do problematiky a shrnutí současných metod měření přenosových kanálů jsou vytyčeny cíle práce --- návrh a sestavení měřícího systému, schopného zachytit všechny rysy a detaily rychle se měnícího únikového přenosového kanálu a praktická měření s tímto systémem. Následuje jádro disertace --- představení vyvinutého systému a detailní popis použitých metod, principů, hardwaru i způsob zpracování naměřených dat. Podstatná část práce je věnována eliminaci nechtěných jevů, způsobených nelineárními prvky v systému. Poslední kapitoly obsahují výsledky praktických měření různorodých scénářů --- kanály pro komunikaci uvnitř vozidla, mezi vozidly i mezi vozidly a infrastrukturou.
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Comparison of selected traits at conspecific plants in disturbed and stressed environments localized within industrial waste deposits and their surroundings in landscape
Glier, Adam ; Kovář, Pavel (advisor) ; Štefánek, Michal (referee)
This study is oriented on the assessment of selected traits at conspecific plant which spontaneously colonize interior space within abandoned industrial area and/or deposits, and those ones occurred in adjacent vicinity. The work continues in previous studies concentrated on abandoned mine tailing containments where some important outputs consist of differences in plant adaptive strategies, growth rate, phenology, body size, ways of dispersal, ecophysiological or genetic parameters (Bryndová et Kovář 2004, Mrázek 2004, Zákravský et al. 2004, Jarolímová 2004, Kovář et al. 2004, Jiráčková et Dostál 2004, Kovář et Herben 2004, Dostál et Kovář 2013, Štefánek 2015, Urbanová et al. 2017). A part of the study includes the significance of small and large genomes at both types of habitats within defined phylogenetic framework. In other words - testing of the hypothesis: There is functional significance of small versus large genomes of plant species by comparing their occurrence in unreclaimed toxic deposits (landscape islands) with their populations from neighbouring habitats (large scale level). Key words unreclaimed industrial deposits in landscape, abandoned mine tailings, genome size, flow cytometry, conspecific taxons, plant traits, colonization, succession, disturbance, stress, restoration ecology,...
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Ants and primary vegetation succession on abandoned industrial-waste deposits
Vojtíšek, Pavel ; Kovář, Pavel (advisor) ; Holec, Michal (referee)
Abandoned industrial-waste deposits (incl. fly ash or tailings ponds) represent very specific and mostly extreme habitat conditions. They offer unique opportunity to study primary succession in cultural landscape. Substrate of the material deposited here shows extreme properties, such as low pH, overheating of the open surface, salinization etc. The aim of this work is to map the colonization of different successional stages of vegetation by ants after years of abandonment of ore-waste deposits in Chvaletice (Eastern Bohemia, CR) and to compare the present state with analogous study made in 2001. Particular aims of both studies (Jarešová 2001, and present study, 2011-12) is to test the influence of ants on vegetation succession. During the years 2011-2012 several prospections were made to record species diversity of ants. On the surface plateau of the sedimentation basin two types of habitats were chosen - the areas with present ant nests and the other areas without them. Each of both types of habitats exhibits different plant species richness: separately the species-area curves were constructed and explained. Three dominant ant species of different size categories present on sedimentation basin were selected for experimental offering of plant seeds, Formica pratensis, Lasius niger, Tetramorium...
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