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Hydromechanic characteristics of clay suspensions
Sedláčková, Markéta ; Mls, Jiří (advisor) ; Císlerová, Milena (referee) ; Šembera, Jan (referee)
A mathematical model of two-phase systems, such as clay suspensions, consists of a set of partial differential equations which reflect both the general laws of mechanics and the relations connecting the involved characteristics of the particular system under consideration. The latter equations are known as constitutive relations. The aim of this study was to find the constitutive relations for kaolin suspensions that are necessary when solving forward problems of fine sludge thickening processes. The task was to design and carry out experimental research of the given suspension and to find a convenient method of utilizing the results for the sake of getting the sought relationships. It follows from the applied mathematical theory of two-phase systems that the sought relationships are hydraulic conductivity of the suspension as a function of the solid-phase concentration and the dependence of the solid-phase concentration on the solid-phase stress. The first part of this study describes the experimental research. Since both the characteristics are difficult to measure, it was necessary to analyze the suspension's characteristics and their measurability. Subsequently, the process of the suspension preparation and the method of laboratory measurements were determined. The following sections present...
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Constitucional institutes of pardon and amnesty
Šembera, Jan ; Janstová, Kateřina (advisor) ; Kudrna, Jan (referee)
1 Abstract CONSTITUTIONAL INSTITUTES OF PARDON AND AMNESTY This thesis deals with constitutional institutes of pardon and amnesty. The thesis aims to provide information on existing legal regulation of this area, closer explanation of the particular legal institutes, describe their historical development and show the way of their application during tenures of Czech presidents. The Introduction contains brief summary of the goals of the thesis, its structure and reasons for choice of the respective topic. The First Chapter is devoted to definition of elementary terms of pardon and amnesty and explanation of basic differences of their forms, i.e. abolition, agraciation and rehabilitation since correct understanding of these terms is crucial for understanding of the whole following text, The Second Chapter deals with historical development of the constitutional institutes in question before emergence of the independent Czech Republic. The Third Chapter contains analysis of current legal regulation in constitutional and general law. The Fourth Chapter is devoted to pardon, particularly more thorough analysis of transfer of capacity to grant pardons and procedural affairs related to granting of pardons in practice. Final part of this Chapter contains description of specific pardons granted during tenures of...
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Tidal phenomena in groundwater hydraulics
Ondovčin, Tomáš ; Mls, Jiří (advisor) ; Šembera, Jan (referee) ; Novotný, Oldřich (referee)
Manifestations of the tidal force have been known to humanity since an- tiquity. The oldest extant remarks on the origin of the tidal force are in the Natural History of Pliny the Elder. He also left us remarks on periodic changes of water-level in wells. This phenomenon does not necessarily have to be connected to the proximity of seas. As such, it is a subject of research since the end of 19th century. Exploring the mechanisms with which the tidal force affects the groundwater level requires combining the findings of geology and hydrogeology but also the knowledge of hydraulics and geomechanics of porous media and certain understanding of astronomy. This thesis contribu- tes to the knowledge of the mechanism of tidal oscillations in groundwater measured in a borehole near Teplice nad Metují in Police Basin. It utilizes models based on the knowledge of geological and hydrogeological structure of the surroundings of the borehole. It investigates the relation between the physical properties of porous media and the amplitude and phase of the tidal oscillations and presents solutions of the models.
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Hydromechanic characteristics of clay suspensions
Sedláčková, Markéta ; Mls, Jiří (advisor) ; Císlerová, Milena (referee) ; Šembera, Jan (referee)
A mathematical model of two-phase systems, such as clay suspensions, consists of a set of partial differential equations which reflect both the general laws of mechanics and the relations connecting the involved characteristics of the particular system under consideration. The latter equations are known as constitutive relations. The aim of this study was to find the constitutive relations for kaolin suspensions that are necessary when solving forward problems of fine sludge thickening processes. The task was to design and carry out experimental research of the given suspension and to find a convenient method of utilizing the results for the sake of getting the sought relationships. It follows from the applied mathematical theory of two-phase systems that the sought relationships are hydraulic conductivity of the suspension as a function of the solid-phase concentration and the dependence of the solid-phase concentration on the solid-phase stress. The first part of this study describes the experimental research. Since both the characteristics are difficult to measure, it was necessary to analyze the suspension's characteristics and their measurability. Subsequently, the process of the suspension preparation and the method of laboratory measurements were determined. The following sections present...
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Constitucional institutes of pardon and amnesty
Šembera, Jan ; Janstová, Kateřina (advisor) ; Kudrna, Jan (referee)
1 Abstract CONSTITUTIONAL INSTITUTES OF PARDON AND AMNESTY This thesis deals with constitutional institutes of pardon and amnesty. The thesis aims to provide information on existing legal regulation of this area, closer explanation of the particular legal institutes, describe their historical development and show the way of their application during tenures of Czech presidents. The Introduction contains brief summary of the goals of the thesis, its structure and reasons for choice of the respective topic. The First Chapter is devoted to definition of elementary terms of pardon and amnesty and explanation of basic differences of their forms, i.e. abolition, agraciation and rehabilitation since correct understanding of these terms is crucial for understanding of the whole following text, The Second Chapter deals with historical development of the constitutional institutes in question before emergence of the independent Czech Republic. The Third Chapter contains analysis of current legal regulation in constitutional and general law. The Fourth Chapter is devoted to pardon, particularly more thorough analysis of transfer of capacity to grant pardons and procedural affairs related to granting of pardons in practice. Final part of this Chapter contains description of specific pardons granted during tenures of...
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Hydraulic and mechanical-physical properties of rocks: Experimental determination and interpretation of results of granite testing
Sosna, Karel ; Brož, Milan (advisor) ; Vilhelm, Jan (referee) ; Šembera, Jan (referee)
This work is focused on the groundwater flow and transport of contaminants in the environment of granitic rocks. Mainly adjective and dispersive types of transport of contaminants are discussed in this work. Transport of contaminants by diffusion is mentioned only marginally in relation to porosity of rock matrix. The main aim of this work was to characterize hydraulic and mechanical-physical parameters of the granite. Partial objectives were to verify the sealing function of the laboratory grout mixture in fractured granite blocks, to characterize the porosity and hydraulic conductivity of the granite matrix at laboratory scale, to find connection between boreholes in situ and to establish a link between the structure of rocks and velocities of seismic waves. Four bentonite and cement mixtures in different weight ratios have been selected as a grout mixture. Suitable injection mixture was selected based on the results of hydraulic conductivity coefficient, and other aspects, such as volumetric stability. The granite blocks were partially grouted by using of the selected grout mixture. Hydraulic conductivity and porosity of the granite rock matrix from the Panské Dubenky test site was tested at three laboratory samples. Hydraulic conductivity was determined with different constant hydraulic...
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Tidal phenomena in groundwater hydraulics
Ondovčin, Tomáš ; Mls, Jiří (advisor) ; Šembera, Jan (referee) ; Novotný, Oldřich (referee)
Manifestations of the tidal force have been known to humanity since an- tiquity. The oldest extant remarks on the origin of the tidal force are in the Natural History of Pliny the Elder. He also left us remarks on periodic changes of water-level in wells. This phenomenon does not necessarily have to be connected to the proximity of seas. As such, it is a subject of research since the end of 19th century. Exploring the mechanisms with which the tidal force affects the groundwater level requires combining the findings of geology and hydrogeology but also the knowledge of hydraulics and geomechanics of porous media and certain understanding of astronomy. This thesis contribu- tes to the knowledge of the mechanism of tidal oscillations in groundwater measured in a borehole near Teplice nad Metují in Police Basin. It utilizes models based on the knowledge of geological and hydrogeological structure of the surroundings of the borehole. It investigates the relation between the physical properties of porous media and the amplitude and phase of the tidal oscillations and presents solutions of the models.
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Prevention of risks in international trade
Verner, Jan ; Sato, Alexej (advisor) ; Šembera, Jan (referee)
International trade goes hand in hand with the humankind since man discovered the fact that some items could be exchanged for others. It is the same with risks which are bounded with international trade since its beginning. The thesis is divided into three main parts. The first part is focused on defining and characterizing risks of international trade according to their origin. The second part describes the most common ways how to avoid these risks. The third part contains detailed analysis of two transactions of the company SOMA spol. s.r.o. on which is this knowledge demonstrated.
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