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Study of ambiguities of Quantum Chromodynamics predictions in hard processes
Posolda, Petr ; Chýla, Jiří (advisor) ; Dolejší, Jiří (referee) ; Rameš, Jiří (referee)
The thesis is devoted to phenomenological investigation of ambiguities of QCD predictions coming from renormalization and factorization procedures. We studied predictions for e+ e− annihilation and jet production in proton-proton collisions. In the former case, we analyzed the dependence on RS up to fourth order at low and high energy region. We particularly focused on the Principle of Minimal Sensitivity as a guide for optimal choice of renormalization scheme. It is shown that a proper choice of RS is important especially at low energies where for example commonly used MS RS implies negative and unstable predictions, and that PMS optimized result don't suffer any of these drawbacks at studied cases. In the second part of the thesis, the dependence of NLO jet cross-section on renormalization and factorization scales is studied for total energy 1.8, 7 and 14 TeV. It is shown that PMS again provides qualitatively reasonable and stable results and seems to be relevant also for processes with hadrons in initial state. 1
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Study of ambiguities of Quantum Chromodynamics predictions in hard processes
Posolda, Petr ; Chýla, Jiří (advisor) ; Dolejší, Jiří (referee) ; Rameš, Jiří (referee)
The thesis is devoted to phenomenological investigation of ambiguities of QCD predictions coming from renormalization and factorization procedures. We studied predictions for e+ e− annihilation and jet production in proton-proton collisions. In the former case, we analyzed the dependence on RS up to fourth order at low and high energy region. We particularly focused on the Principle of Minimal Sensitivity as a guide for optimal choice of renormalization scheme. It is shown that a proper choice of RS is important especially at low energies where for example commonly used MS RS implies negative and unstable predictions, and that PMS optimized result don't suffer any of these drawbacks at studied cases. In the second part of the thesis, the dependence of NLO jet cross-section on renormalization and factorization scales is studied for total energy 1.8, 7 and 14 TeV. It is shown that PMS again provides qualitatively reasonable and stable results and seems to be relevant also for processes with hadrons in initial state. 1
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Analysis and evaluation of implementation of social policy on homelessness
Rameš, Jiří ; Háva, Petr (advisor) ; Kružík, Lubomír (referee)
The work deals with the homelessness as a social problem and with the implementation of social policy in this area. The author examines the issue of homeless people from several perspectives. He discribes the importance of home as an essential component for satisfying the basic human needs. There are focused the determinants that cause the loss of homes and job. The author brings the institutional model of the functioning of the policy and analyzes the key human rights documents that are somehow affecting the homeless. This is especially the Universal Declaration of Human Rights, and as the International Covenant on Economic, Social and Cultural Rights. Describes the organization and the importance of FEANTSA. Furthermore, analyzing the documents of the Ministry of Labour and Social Affairs. In another part, the author introduces his knowledges from the qualitative research of homeless. He is interested for each specific aspect of their lives and their attitudes to them. These include issues of health and social care, access togovernment and the "normal" life. The result of this work is an assessment of homelessness policy in relation to the above mentioned international documents, the documents at the national level research and the homeless.
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Investigation of the factorization scheme dependence of finite order perturbative QCD calculations
Kolář, Karel ; Chýla, Jiří (advisor) ; Rameš, Jiří (referee) ; Formánek, Jiří (referee)
Title: Investigation of the factorization scheme dependence of finite order per- turbative QCD calculations Author: Karel Kolář Institute: Institute of Particle and Nuclear Physics Supervisor of the doctoral thesis: prof. Jiří Chýla, CSc., Institute of Physics of the Academy of Sciences of the Czech Republic Abstract: The main aim of this thesis is the investigation of phenomenological implications of the freedom in the choice of the factorization scheme for the de- scription of hard collisions with the potential application for an improvement of current NLO Monte Carlo event generators. We analyze the freedom associated with the definition of parton distribution functions and we derive general formu- lae governing the dependence of parton distribution functions and hard scattering cross-sections on unphysical quantities specifying the renormalization and factor- ization procedure. The issue of the specification of factorization schemes via the corresponding higher order splitting functions is discussed in detail. The main attention is paid to the so called ZERO factorization scheme, which allows the construction of consistent NLO Monte Carlo event generators in which initial state parton showers can be taken formally at the LO. Unfortunately, it has turned out that the practical applicability of the ZERO...
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Methods ....
Vaňkát, Michal ; Rameš, Jiří (advisor) ; Dohnal, Karel (referee)
v AJ Vaňkát, Michal - Methods of measurement of illumination and practical measuring in study rooms on faculty First Faculty of Medicine Charles University in Prague, Praha 2, Kateřinská 32 Thesis supervisor: RNDr. Jiří Rameš With my Thesis I occupy with measurement and assessment of artificial, day and joint illumination in chosen teaching rooms of 1st faculty of medicine Charles University in Prague, concretely in study rooms of Institute of Science Information and auditory and autopsy rooms of Anatomical institute. In theoretical part of my work I occupy with physical description radiation, light and illumination which is important for their practical measurement and assessment. I occupy also with physiology of visual perception, description of artificial light sources and principles of illumination by day light, so as measuring instruments, quantities which are used to describe illumination. In practical part I summarize advancement and methods of measuring illumination. The estimate of measuring error includes. The outputs of practical measurement are compared with valid norms and recommendations. In conclusion of each room is including not only its suitability but even the recommendation to improve actual state. From results of our measurements comes out that all measured rooms of faculty...
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