National Repository of Grey Literature 64 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Study of gamma decay in 168Er from neutron capture
Knapová, Ingrid ; Krtička, Milan (advisor) ; Gunsing, Frank (referee) ; Veselý, Petr (referee)
The γ-ray emission process in highly-excited nuclei is typically described within the statistical model of nucleus using the two main ingredients - the level density (LD) and the photon strength functions (PSFs). The knowledge of LD and PSFs is essential in the modeling of nuclear reactions with applications in astrophysics or advanced nuclear reac- tors. In this work, we studied the multi-step γ-ray cascade spectra following the radiative neutron capture 167 Er(n, γ)168 Er measured with the Detector for Advanced Neutron Cap- ture Experiments in Los Alamos National Laboratory. The experimental γ-ray spectra were compared with the simulated spectra exploiting the dicebox Monte Carlo code for simulation of radiative decay to test different models of LD and PSFs. Furthermore, the measured spectra allowed us to determine the population of the isomeric state in 168 Er with 109 ns half-life and compare it with the simulated isomeric population, which provides an important test of the applicability of the statistical model. The simulated isomeric population was found to be significantly lower than the experi- mental one if no structure effects are assumed above the excitation energy of the isomer. If we adopt the decay scheme up to excitation energy well above 2 MeV, we obtain the simulated isomeric ratio...
Study of statistical decay in well deformed rare-earth nuclei
Valenta, Stanislav ; Krtička, Milan (advisor) ; Pospíšil, Stanislav (referee) ; Veselý, Petr (referee)
The γ decay of highly excited nuclear levels can be described within the statistical model of nucleus in terms of the level density and a set of photon strength functions. The knowledge of these quantities enables more accurate calculations of reaction rates in many different reactions which are important especially in nuclear astrophysics and in the development of advanced nuclear reactors. Despite the fact that the photon strength functi- ons have been studied for decades, there are still contradicting experimental results regarding the low energy behavior of dipole strength. One of these ca- ses is the shape of electric dipole photon strength function and the strength of the scissors mode in well-deformed rare-earth nuclei. In this thesis the ana- lyses of γ-ray spectra measured by two different experimental setups are pre- sented. The two-step γ cascades measurements with odd gadolinium targets were performed at the research reactor LVR-15 at the Research Centre Řež. In the multi-step γ cascades experiments the γ rays following resonance ne- utron capture on 161−163 Dy targets were measured with the highly-segmented γ-ray calorimeter Detector for Advanced Neutron Capture Experiments in the Los Alamos Neutron Science Center at Los Alamos National Labora- tory. Experimental spectra were compared...
The Court of Justice of the European Union: the engine of integration?
Veselý, Petr ; Plechanovová, Běla (advisor) ; Parízek, Michal (referee)
This thesis deals with the topic of influence of the Court of Justice of the European Union on the process of European integration. For this purpose, the thesis asks the following question: "How has the Court of Justice of the European Union in selected cases contributed to the strengthening of European integration?" After an overview of the methodological basis, the thesis thoroughly examines the main theoretical approaches and authors that focused on the topic of Court of Justice and its influence on European integration: neofunctionalism, intergovernmentalism, neorationalism, supranationalism and legalistic approach. In the third part, five landmark cases of the ECJ have been chosen for detailed analysis: Van Gend en Loos, Costa vs. E.N.E.L., Internationale Handelsgesellschaft, Les Verts and Francovich. The thesis not only maps the political situation surrounding their announcement, but also the aftermath, consequences and reactions of member states to the judgements. In its last part, the thesis attempts to connect the theoretical approaches with the findings of the aforementioned analysis of landmark decisions. The thesis concludes that the Court of Justice in fact did contribute to the strengthening of European integration, namely by establishing the principles of direct effect, superiority...
Comparison of individual's performance in a discrimination tasks with respect to the hierarchy status
Kocourková, Zuzana ; Landová, Eva (advisor) ; Veselý, Petr (referee)
The ability to discriminate stimuli is the most tested cognitive task in pigeons (Columbia livia f. domestica) within up to now published experiments. Up to now, the influence of personality traits on discrimination has been poorly studied. This thesis looks into the differences in success between individuals and discrimination tasks, and analyzes factors including personality traits influencing the success rate. In this experiment, the total of 72 individual pigeons were tested in four linked tasks: 1) discrimination of black and white screen in the Skinner's box, 2) discrimination of black and white circle patch in the Skinner's box, 3) discrimination of black and white lid in a cage and 4) discrimination of reduced black and white stimuli, placed on a lid, in the cage. The criterium of success was set on 80%. In the Skinner's box, the task were passed by lower number of individuals (6% in first, 20% in second) in comparsion with the cage (48% in third and 50% in fourth). The tasks differed in environment and size of stimuli. It has been determined, that te tested subjecs were able to generalise in the Skinner's box, with an expception when the stimuli was reduced. While testing, all factors that might have influenced the success rate were observed. It has been proved, that the success rate was...
Design of Brněnská street - Miroslav
Veselý, Petr ; Novák, Martin (referee) ; Radimský, Michal (advisor)
The subject of the diploma thesis is the elaboration of documentation for the issuance of a joint decision (DÚSP) for the project Modernization of Brněnská Street in Miroslav. The reason for the modernization is the emergency condition of the existing road and its unsatisfactory technical solution. The communication of functional group B (collection) is located in the urban area of the city. As part of the modernization of Brněnská Street, modifications of intersections, exits, sidewalks and parking spaces are also addressed.
Dependency of Asphalt Mixtures Low Temperature Properties on Binder Properties
Veselý, Petr
The paper deals with results of tests for low temperature properties of asphalt mixtures in correlation with results of tests on low temperature properties of the bitumen used in those. Properties of materials used in temperatures, which with changing climate keep approaching the critical value, are still very current topic, which cannot be overlooked. The aim of this paper is to point out the extent in which we can affect these properties with different binders. For this purpose, low temperature tests were carried out which include the thermal stress restrained specimen test to set critical temperature of asphalt mixture, Fraasse breaking point and the bending beam rheometer.
Effect of a dummy on behaviour of Yellowhammer and Chiffchaff males in playback experiments
Kubátová, Hana ; Petrusková, Tereza (advisor) ; Veselý, Petr (referee)
A playback experiment in which a recording of vocalization is played to the tested subject and its response is observed, is a widely used tool for examining bird song and its functions. Most often only acoustic stimulus is used, but sometimes a visual stimulus is also provided in the form of a dummy. Taxidermic mounts or models made from different materials are used as the dummy. It is discussed among researchers, whether it is or is not necessary to use a dummy in experiments and how does its presence affect behavior of the tested individuals. However, only few studies directly focus on this issue and test the effect of dummies. The best way to test the effects of a dummy on passerines in playback experiments is to test the same individuals in both situations (with a dummy and without a dummy) and compare the reactions. The aim of this theses was to perform such experiments on Chiffchaff (Phylloscopus collybita) and Yellowhammer (Emberiza citrinella) males and to find out whether they would behave similarly in both variants of the experiment, or if their reaction would be enhanced in the presence of a dummy. Chiffchaffs reacted significantly more aggressively in the dummy experiment. The biggest difference was time spent by attacking the dummy and staying close to it. In Yellowhammers, the dummy...

National Repository of Grey Literature : 64 records found   1 - 10nextend  jump to record:
See also: similar author names
34 VESELÝ, Petr
2 Veselý, Patrik
17 Veselý, Pavel
6 Veselý, Přemysl
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