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Hydrodynamic mixing of water-ask mixture in vessel
Holub, Přemysl ; Franc, Zdeněk (referee) ; Habán, Vladimír (advisor)
Master´s thesis Hydrodynamic mixing of water-ash mixture in vessel is interested in describing fluid and solid particles flow in a vessel. The mixing was conducted in cylindrical vessel by a radial nozzle. The goal of the thesis is to describe flow field and places where the most of the particles are descending according to position, depth, flow rate and nozzle orientation in the vessel. An experiment was conducted in order to investigate and document 8 different positions and orientation of the nozzle. Significant changes in flow fields and mixing time were observed. A mathematical model of the vessel with the nozzle was created in Fluent program. Places with the lowest velocities according to the model were in good agreement with places where the most of the solid particles were descending.
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Control Systems of Gears Changing on Load in Tractors Gearboxes
Holub, Přemysl ; Svída, David (referee) ; Dundálek, Radim (advisor)
This bachelor thesis is interested in the overview of tractor’s gearboxes, which are changing on load. There are reasons, why it has to be costructed and there are requirements for it. There are also described PowerShifts, which allow us gear changing on load. After basic description of concrete gearbox, there is always some example of using in current tractors. In period named Mechanical gearboxes, wchich are changing partly on load there is more space for Zetor tractors and its gearboxes. In one of the last period there is important part about continuously variable transmissions where the driving speed is regulated steplessly. These gearboxes are considered to be modern technology of transfer engine torque.
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Interactive effects of adaptation technology, based on no-till sowing into the mulch of cover crop residues, and nitrogen nutrition on photosynthetic performance of maize under drought stress
Opoku, Emmanuel ; Holub, Petr ; Findurová, Hana ; Veselá, Barbora ; Klem, Karel
The aim of this study was to evaluate the interactive effect of adaptation technology based on no-till sowing into cover crop mulch and nitrogen nutrition on photosynthetic performance of maize under short term drought stress induced by rain-out shelters. The experiment was established in two locations in the same climatic condition but differing in soil fertility. The negative effect of drought on CO2 assimilation rate was modulated by nitrogen nutrition. However, while nitrogen nutrition led to alleviating effect at the location with higher fertility, the opposite effect was found at the site with lower fertility. Adaptation technology had only a minor impact on photosynthetic response to drought, but it generally increased CO2 assimilation rate at the site with higher soil fertility and decreased at the site with lower soil fertility. We can conclude that adaptation technology, despite of assumptions, did not significantly change the resilience of maize to drought, and probably longer use of such technology is required to improve soil water retention and thus also balanced supply of water to plants. \nAt the same time, we did not find a negative impact of adaptation technology on photosynthesis which can be related to cooler soil during maize emergence and slower mineralization, although the use of adaptation technology seems to be more effective in soils with higher fertility.
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Liber pravitatis haereticorum from Parish of Humpolec from the 50th to 80th of 18th century
HOLUB, Pavel
The aim of the thesis of title Liber pravitatis Haereticorum from Parish of Humpolec from the 50th to 80th of 18 century is processing of Liber Pravitatis Haereticorum from the collection of Dean´s Office in the publishing form for the use of the transliteration. The editi-on is accompanied by the apparatus with the initial article in which I have with the book from the view of the diplomatical-administrative perspective. The breakdown of this work is in line with the assignment of the project. The series are preceded by the study and because of the formal reasons, they are included in attachments. The study is divided into two chapters. The first chapter deals with the diplomatic-administrative contexts of the Parochial Offices in the 18th century. Through analysis of books and documents preserved in the Fund of Dean´s Office. I have tried to include Liber Pravitatis haereticorum into the wide spectrum of the documents currently stored in the State District Archives in Pelhřimov. The second chapter deals directly with the book Liber Pravitatis haereticorum. The structure of this chapter is based on three diplomatic methodological views. On the basis of the use of the further material and the other methods (inductive and partly also comparative) can be noted that Humpolec book of the rectificated heretics is the original of the books in-tended for the internal use by the Authority. The writer have recoursed Parish of the Register Office for some registration and partly some of the forms he have copied from the born and dead registers into this book. Through diplomatic and administrative-historical analysis has been managed to clarify the origin and the evolution of the forms, and the book Liber Pravitatis Haereticorum itself from the Parish of Humpolec, together with its original purpose.
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The Town book of Pacov from the 1475-1683
Holub, Pavel ; Ebelová, Ivana (advisor) ; Sulitková, Ludmila (referee)
6 Annotation The aim of the thesis is to introduce an urban book of Pacov in term of a diplomatic analysis. This urban book was established from the second half of 15 century to the second half of 17th century. The actual analysis of the registers is introduced by two sub-chapters. The first one is focused on the socio-politico-administrative development of the areas of Pelhřimov and Pacov during the late medieval and early modern period. The environment of Pacov is directly reflected in the section devoted to municipal laws, which aim is to put the content of privileges issued for Pacov to a broader social context. The sub-sections describing the outward signs of the urban book, an analysis of the registers from a diplomatic-content analysis point of view and the urban book in the context of the written production of the municipal office are the central part of the analysis of the urban book of Pacov. The groups sorting of different types of registers is based on the structure of municipal book as Ludmila Sulitková has applied to the urban environment of Brno books in the context of the urban book development in the Middle Ages. This classification is based on the results of a longtime research, whose origin can be associated with Václav Vojtíšek. The main consideration in the discussion of each register...
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The Oberhollabrunn System of Records Services in the First Half of the 20th Century.
Holub, Pavel ; Šouša, Jiří (advisor) ; Ryantová, Marie (referee) ; Sviták, Zbyněk (referee)
The aim of the thesis is to analyse office reform which was implemented in the first two decades of the 20th century in the environment of Austro-Hungarian Monarchy. As its beginnings are bound up with District Office in Oberhollabrunn (nowadays Hollabrunn) situated in Lower Austria it is commonly reffered to as so-called Oberhollabrunn system, eventually as Low-Austria system or also Kielmansegg reform. In 1905 its utilisation was spread to all district offices in Lower Austria and it was implemented in one of the offices in Halič, in Přímoří and in Moravia as well. On the basis of an in practice tried and tested norm it was searched for a way of how to improve officework also at provincial offices (governorships). Therefore for example Prague's office of the second instance of state administration acceded to their own form of solution. According to its author this variant bears the denomination Raprrich's system. The introductory part of the presented thesis is dedicated to the analysis of the literature concerning modern diplomatics in the context of the office reforms. A particular chapter is an elaboration on the methods of modern diplomatics and their applications in the research of the office reform as itself. The third chapter represents the transformation of the administration on the level...
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Methods of detection of fungal diseases applicable in plant phenotyping and remote sensing
Klem, Karel ; Veselá, Barbora ; Holub, Petr ; Urban, Otmar ; Mezera, J.
This methodology summarises findings from a comparison of three perspective methods of fungal disease detection applicable for remote sensing and plant phenotyping of fungal disease resistance. These methods are spectral reflectance, infrared thermal imaging, and blue-green fluorescence imaging. On the example of winter wheat infection with powdery mildew, stripe rust and brown rust the strengths and weaknesses of individual methods were demonstrated. From these results it is evident that all three methods are potentially applicable for non-destructive fungal disease detection, but their practical use may vary. Testing of spectral reflectance indices for the detection of fungal diseases showed particularly the high detection reliability of the red-edge and green band based spectral vegetation indices. Infrared thermal imaging has shown high detection accuracy for powdery mildew and brown rust, but lower for stripe rust. Blue-green fluorescence and thermal imaging seems to be also a very promising tools for evaluating the intensity and spatial distribution of infection on a leaf level.
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