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Design of lighting system in car service
Borůvka, Jan ; Štěpánek, Jaroslav (referee) ; Škoda, Jan (advisor)
The theoretical part is focused on lights, notions and calculations in the area of light technology, basic lightning sources and lamps. This work is also about the principle of lightning measuring. The main aim of the work is design of a new artificial lightning system in a workshop which is located in village called Petrov. At first, the control measuring of existing lightning was done which is mentioned in this work.
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Phototherapy
Joklík, Vojtěch ; Škoda, Jan (referee) ; Štěpánek, Jaroslav (advisor)
This thesis describes relationship between human body and light. It is focused on perception of light with human eye, skin and their reaction to incident light and its intensity. Then it contains short description of Icterus Neonatorum (yellow-gum), Constitutional Dermatitis, Lepriasis and their treatment. It is followed by description of various sources of light, their use in medicine and reaction of body to them. This work includes measurements and evaluation of five sources of light.
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Proposal of the village public lighting
Schittenhelm, Dominik ; Baxant, Petr (referee) ; Štěpánek, Jaroslav (advisor)
The thesis is divided into several parts. The first part is theoretical and its main focus is the description of public lighting and the theory regarding lighting technology. The second part continues with the research of the current state in Bezděkov village. The thesis further describes the proposal for the village public lighting with the use of HPS and LED technology, where village models are made for both options to show the requested result. The last part of the work deals with cables dimensioning, the selection of the most effective regulations for lighting, and finally the economic assessment of both projects, while both the investment expenses and the public lighting service fees for the next 20 years are included.
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Measurement of Discharge Light Sources Parameters
Štěpánek, Jaroslav ; Krbal, Michal (referee) ; Baxant, Petr (advisor)
The aim of my bachelor’s thesis is to provide a summary about discharge lights sources. It deals with their light and electric qualities. The work is divided into theoretical and practical part. The theoretical part pays attention to the construction of light sources; it provides information about photometric parameters and explores the connections the light sources into the power network. It describes the discharge lamp subtypes and subcategories. In practical part the quality of light sources is measured and the following results of measurement are evaluated.
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Bezdrátová svítidla
Krbal, Michal ; Škoda, Jan ; Štěpánek, Jaroslav ; Baxant, Petr
The development in the field of lighting technology is focused on new technologies, light sources with higher efficiency and better lighttechnical parameters and the development of luminaires, especially in the field of design and small light sources. The efficiency of light sources is associated with converting of electricity into the light in the entire process chain, including the efficiency of power wires and ballast systems. It can be stated that the losses in the power supply line and wires path are less important in comparison with the actual process of internal energy conversion in light sources. Since the beginning of use of electrical energy for the conversion to light the conductor and wires are used. The luminaires are fixed to one place and move with them is limited to a small place. The solution may be a wireless power and energy transfer. The result of this solution is the possibility of placing the luminaires anywhere in a defined space without wires and cables. The disadvantage is significantly lower efficiency of energy transfer and strong electromagnetic interference, which may exceed the limits of EMC and affect the operational of other electrical equipments. Questionable issue is the exposure of human body to RF fields unnecessarily. This paper deals with the search for potentially useful applications of wireless powering in lighting.
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Methods of ignition spark gaps
Pekárek, Dominik ; Štěpánek, Jaroslav (referee) ; Krbal, Michal (advisor)
This thesis deals with methods of spark gap ignition. The thesis describes spark gap ignition by external electrode, by Rogowski electrode and by lasers. Advantages and disadvantages of these methods are also discussed. In the final part of the thesis there is described experiment with high voltage spark gap.
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Photobiological safety of light sources and lighting systems
Štěpánek, Jaroslav ; Krbal, Michal (referee) ; Škoda, Jan (advisor)
The thesis deals with the problems of the photobiological lamp and lamps systems safety. It is divided into theoretical and practical parts. The theoretical part touches the basic knowledge concerning the eye and vision, eye and skin diseases caused by excessive exposure to non-ionizing radiation. And besides that there are described the sources of light causing the possible exposure and further more it includes the methodology of measurement and evaluation of photobiological safety. The practical part investigates a measurement of the spectrum of light sources. The measured data are evaluated according to the methods mentioned in the theoretical part.
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An analysis of the international mobile digital distribution platforms market
Štěpánek, Jaroslav ; Sedláček, Jiří (advisor) ; Filip, Ondřej (referee)
The main subject of this diploma thesis is the mobile digital distribution market. The first chapter defines important terms and describes the area comprehensively. The second chapter lists examples of some platforms, shows statistical data and introduces common business models. The third chapter compares the Apple App Store and Google Play based on selected criteria. The fourth chapter deals with conducted survey data in order to test the hypothesis that czech consumers in general do not show a difference in attitude towards mobile distribution storefronts compared to their foreign peers. The fifth and last chapter tries to analyze technical backgrounds of varying content availability across different countries. Also, it deals with selected legal issues.
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An analysis of the WTO dispute - DS 231 (EC - Trade Description of Sardines)
Štěpánek, Jaroslav ; Štěrbová, Ludmila (advisor) ; Machková, Hana (referee)
This paper describes in three chapters the dispute between the European Communities and Peru about the trade description of preserved sardines. At the end of the eighty's the EC introduced a new regulation according to which sardines from Peru and other countries alike could not be sold under the name sardines on the common market any more. Peru did object to this regulation and used the World Trade Organization's Dispute Settlement Understanding framework to accomplish its objectives.
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