National Repository of Grey Literature 37 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
In the Forrest
Pucharová Kramářová, Vendula ; Dub, Petr (referee) ; Lahoda, Tomáš (advisor)
My work began with taking photos in the forest at night; this work was very important to me because of the mysterious feeling. My paintings are stylized more than realistic. I'm captivated by untidy nature, with fallen trees and decaying stumps. Oil is my medium- some places are detailed while others are expressive.
Utilization of Plasmonic Structures for Improvement of Photovoltaic Devices
Hrtoň, Martin ; Dub, Petr (referee) ; Břínek, Lukáš (advisor)
The bachelor thesis deals with absorption and scattering features of periodically arranged golden and silver nanospheres. Using numerical simulations and analytical computations the shape of the electromagnetic field at the plasmonic nanostructure was found. Further, possibilities of a utilization of the periodical arrangement in photovoltaic devices were discussed.
Mathematical pendulum
Kučerová, Barbora ; Dub, Petr (referee) ; Franců, Jan (advisor)
This bachelor’s thesis deals with the mathematical modeling of the behaviour of mathematical pendulum. The aim of this thesis is to find the equation of mathematical pendulum, compute the trajectories of solution and interpret their meaning, clasify the singular solution, plot the phase portrait in MATLAB software for the basic model and for the generalized model of the damped and driven pendulum.
Physics of Metamaterials
Láska, Martin ; Kalousek, Radek (referee) ; Dub, Petr (advisor)
The bachelor work deals with electrodynamics of metamaterials for which both the electric permittivity and magnetic permeability are simultaneously negative. It is shown that the double negative media are described by a negative refraction index which has an important impact on optics laws. In particular, the negative refraction is demonstrated by simulation of interaction of the Gauss monochromatic beam impinging on a negative refractive material. Next, the electromagnetic energy propagation in the negative refractive materials is studied. It is shown that the energy propagation velocity equals the group velocity, which has the opposite sign than the phase velocity. Finally, Fresnel formulas valid both for positive and negative refraction index are given.
Thermal Desorption Spectroscopy (TDS) and its Application for Research of Surface Processes
Potoček, Michal ; Čech, Vladimír (referee) ; Pavlík, Jaroslav (referee) ; Dub, Petr (advisor)
ermal desorption spectroscopy (TDS) is a common method for surface analysis of adsorbed molecules. In chapter 1 the work deals with the theoretical background of this method and shows the principles of a desorption process influenced by subsurface diffusion. Chapter 2 first shows application of TDS for detection of surface molecules and determination of binding energy.Experiments were mainly focused on ditermination of surface adsorbents and impurities on Si wafers. The second part of chapter 2 describes desorption of atoms of a Ga layer on Si surface and their subsurface diffusion. A Ga diffusion process was also observed by with secondary ion mass spectrometry (SIMS) and numerically simulated.
Plasmonic Resonant Antennas
Kvapil, Michal ; Dub, Petr (referee) ; Tomanec, Ondřej (advisor)
In the first part, using of nano- and microparticles in the plasmonics as well as the possibility of measurement resonant spectra of metallic nanostructures by photoluminescence are discussed. The main part of the work is focused on testing the possibility of using software Lumerical FDTD Solution 5.1.3 to simulate near field enhancement in the vinicity of plasmonic resonant antennas. Finally the results of simulations and analytical computation are confronted.
Fabrication of Graphene and Study of its Physical Properties
Procházka, Pavel ; Rezek, Bohuslav (referee) ; Kalbáč,, Martin (referee) ; Dub, Petr (advisor)
This doctoral thesis is focused on the preparation of graphene layers by Chemical Vapor Deposition (CVD) and their utilization for fabrication and characterization of field effect transistors. The theoretical part of the thesis deals with different methods of graphene production and measurement of its transport properties. In the first part of the experimental section the growth of polycrystalline graphene and individual graphene crystals with sizes up to 300 m is investigated. Further, graphene layer was also grown on an atomically flat copper foils, which were fabricated in order to achieve the growth of graphene of higher quality. Subsequently, the transport properties of field effect transistors produced from the grown layers were measured. The last two chapters deal with a doping of graphene layer by gallium atoms and X-ray radiation. Whereas the deposition of gallium atoms on the graphene surface causes chemical doping of graphene layer by charge transfer, X-ray irradiation of graphene field effect transistors induces the ionization of positively charged defects in dielectrics, which electrostatically dope a graphene layer.
Post - conceptual Approaches in the Contemporary Czech Painting
Dub, Petr ; David,, Jiří (referee) ; Havlík, Vladimír (referee) ; Zálešák, Jan (referee) ; Stratil, Václav (advisor)
The dissertation thesis entitled Selected Post-conceptual Approaches in the Contemporary Czech Painting reflects the author’s expressions of the youngest artists’ generation working with the conceptual forms in the painting medium after 1996. The aim of the dissertation is to outline the conflict and overlapping of the conceptualism and painting. Apart from the development of conceptual art, the reference framework of the submitted thesis also comprises the post-modern turn in visual arts associated with a global change in its social status during the second half of the 20th and at the beginning of 21st century. The development of the domestic artistic scene and particular approaches are presented on the basis of a representative selection of the most distinctive tendencies and significant authors, being compared with the work of foreign artists. The text interprets the key theoretical treatises, reviewed responses and artists’ statements covering the domain of “contemporary painting to conceptual art”.
Detection of Localized Surface Plasmons on Metal Nanostructures
Konečná, Andrea ; Dub, Petr (referee) ; Kalousek, Radek (advisor)
This bachelor's thesis deals with theoretical and experimental study of localized surface plasmons excited on metal nanostructures. Analytical calculations were compared to simulations and measurements using assembled apparatus and Fourier-transform infrared spectroscopy (FT-IR) in infrared range. Obtained results were discussed considering both validity of performed approximations and quality of manufactured nanostructures.

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