|
|
Power line transfer function generator
Vlček, Josef ; Martinásek, Zdeněk (referee) ; Mlýnek, Petr (advisor)
This bachelor's thesis deals with data communication over powerline (PLC). It describes the PLC technology, its basic division, the current opportunity to use, the sources of interference and the types of modulation. It analyzes the basic parameters of transmission line by means of which it is possible to create the equivalent transmission line model in two different ways either the mathematical model with multipath propagation or by using two-port with cascade parameters. The practical part contains measurement transfer function on different topologies. The measured values are compared with the numerical models. Furthermore, the transfer function generator was created which simulates the properties real distribution network.
|
|
| |
|
|
Automatic evaluation of the solar spectrum
Vlček, Josef ; Křivík, Petr (referee) ; Špinka, Jiří (advisor)
This master’s thesis deals with properties of a solar radiation, measurement of a solar spectrum and standard IEC 60904-9, which defines the requirements for a solar simulator. Solar simulators are classified as A, B or C for each of the three categories based on criteria of spectral distribution match, irradiance non-uniformity on the test plane and temporal instability. The goal of this thesis was creation software for automatic evaluation of a solar spectrum. Software was created in Matlab application and its function is to determine class of solar spectral match with spectrum AM1.5. The last part contains a measurement of various solar sources and using the created software was determined its spectral match with spectrum AM1.5.
|
|
|
Very low temperature measurement (to -160 of degrees Celsius)
Vlček, Josef ; Rampl, Ivan (referee) ; Chmelař, Milan (advisor)
his semestral thesis deals with measurement of low temperatures (down to -160 degrees Celsius). This thesis describes basics of cryotherapy and its practical implementation. It also deals with different types of temperature sensors which means theoretical description of their work, thein advantages and disadvantages. The main goal is to put a recommendation of which of this sensors is the most suitable for practical implementation of the thermometer.
|
|
|
The use of DTS systems for temperature logging in deep boreholes
Štěpánek, Václav ; Dědeček, Petr (advisor) ; Vlček, Josef (referee)
Title: The use of DTS systems for temperature logging in deep boreholes. Author: Václav Štěpánek Department: Institute of Hydrogeology, Engineering Geology and Applied Geophysics Supervisor: Mgr. Petr Dědeček, Ph.D., GFÚ AV ČR Abstract: The signifcance of deep geothermal energy is progressively growing, similar to the extraction of unconventional oil and gas reserves, which involves the drilling of deviated wells in regions with elevated temperatures. Temperature measurements play a fundamental role in exploration, drilling, and subsequent monitoring, with equipment evolving due to technological advancements, particu- larly in temperature measurement capabilities. The aim of this thesis is to focus on a Distributed Temperature Sensing (DTS) system that utilizes fber optic technology for temperature logging. Specifcally, these fber optic sensors enable continuous profle measurements in real time, which is well-suited for capturing dynamic changes in the temperature feld. Simultaneously, fber optic cables demon- strate durability and reliability, making them suitable for permanent installations in high-temperature, high-pressure, and highly corrosive environments. The resul- ting variability in deployment enables adaptation within the measurement context. In deep borehole measurements, the DTS can be...
|
|
|
Volcanic rocks and possibilities of their research using geophysical methods
Votrubcová, Kristýna ; Valenta, Jan (advisor) ; Vlček, Josef (referee)
5 Abstrakt (EN) The research focuses on the application of geophysical methods and subsequent data processing for the prospecting of igneous rocks and the search for volcanic structures. The literature review summarizes the physical and petrological foundations of various physical methods that can be utilized in the search for volcanic rocks, and discusses their most appropriate uses. The greatest emphasis is placed on the method of magnetometry, which is significant in identifying volcanoes. The work also explores the use of geoelectrical and seismic methods, radiometry, and gravimetry. In the practical section, geophysical measurements were conducted in the field to map the extent of the Tertiary volcano and other geological structures in the Elbe Sandstone Mountains. The extent of the volcanic body was successfully mapped using magnetic measurements. The results of the measured Electrical Resistivity Tomography (ERT) profile corresponded to the extent of the volcanite body and showed that the body was significantly fractured. Other findings include the mapping of a fault zone, to which the volcanic body ascend could be linked, and the mapping of another fault zone in a nearby valley, which is assumed to have a fault character. Key words: igneous rocks, volcanism, geophysics, magnetometry, VLF, ERT
|
|
|
Valuation of the project
Horáková, Lucie ; Sieber, Martina (advisor) ; Vlček, Josef (referee)
The bachelor's thesis deals with the financial evaluation of a fictitious investment project, which deals with the establishment of the garden center Zahradnictví Pomněnka. The thesis is divided into two parts. The theoretical part presents selected static and dynamic evaluation methods. The bachelor thesis also deals with financial statements and marketing tools. In the practical part, selected methods are applied to a fictitious investment project. In the end, a recommendation is formulated for the investor with regard to the obtained data.
|
|
|
Evaluation of a Transport Infrastructure Investment
Blažek, Tomáš ; Sieber, Martina (advisor) ; Vlček, Josef (referee)
In this work, I deal with external costs used in economic evaluations of transport infrastructure projects. Specifically, I measure how the results of an economic evaluation depend on the input parameters used. In the first part of my work, I analyze and compare various methods for determining the social costs of accidents and noise. In the second part of my work, I verify the official economic evaluation of the Prague - Dresden high-speed railway project using modified input data. The analysis of the methods for determining the societal costs of transportation-related accidents and noise has shown that there is no single method to be universally applicable regardless of context. The calculations performed using modified input parameters revealed high variability in the results of economic evaluations. The high degree of dependence of the results of economic evaluations on the input parameters confirms the importance of standardization of the methodology for economic evaluation of projects. Key words: evaluation, externalities, investment
|
|
|
The application of marketing mix - case study
Otavová, Petra ; Vlček, Josef (advisor) ; Sieber, Martina (referee)
The final aim of my study is to create marketing mix for selling luxury eyeglasses. This study is worked out in conditions of the company named Optik Otava which does not use professional marketing strategic planning. First of all the optical profession is presented and the optical market is analyzed. In the second part, there is prepared a theoretical base for marketing mix creation. Marketing mix is just one part of marketing strategic planning, therefore I also have to speak of particular methods used for situation analysis processing, the marketing aims, marketing strategies and segmentation of the market. Then the detailed elaboration of fundamental parts in marketing mix (product, price, place and promotion) is realized. The last part is the case study. There is description of the company which is mentioned above, as well as, there is created the structure of its marketing mix. The value of nonprofessional marketing mix is not low. Despite of this fact there are suggested proposals and recommendations at the end, which could positively affect marketing mix of that company. The most important one relevant to the place proposes to establish the own wholesale. This would affect also the price and the product. The whole study should be valuable for the company. It should help its to develop the marketing...
|
|
|
Financial Analysis of Selected Nonprofit Organization
Eliášová, Barbora ; Sieber, Martina (advisor) ; Vlček, Josef (referee)
The aim of bachelor thesis is a financial analysis of the biggest non-profit organization in the Czech Republic People in Need and to evaluate its current situation of financial activities on the basis of data from balance sheet and profit and loss statements in years 2008 - 2012. In the first chapter there non-profit sector in the society is described, firstly from the historical context and secondly from the perspective of goals and purposes. Indicators, which are necessary for implementation of financial analysis in the practical part are defined in the second chapter. In the practical third chapter the concrete non-profit organization People in need is described and there the outcomes from horizontal and vertical analysis are evaluated. In the last fourth chapter the financial health of organization is evaluated by means of proportional indicators autarky, profitability, liquidity, activity and indicators of financial independence.
|
guest ::
RSS feed.