|
|
Evaluation of runoff formation in catchment using stable isotopes 2H and 18O and water temperature
Hojovec, Daniel ; Vlček, Lukáš (advisor) ; Jeníček, Michal (referee)
The evaluation of the water regime of the springs, or the total runoff in small mountain catchments, is an important aspect in this work for understanding the functioning of the catchment from the point of view of the precipitation-runoff process, and above all for the verification or refutation of the various methods used to evaluate the runoff of the mountain catchment. For the stated purposes, between 2018 and 2020, repeated sampling was carried out from water courses, soil (shallow wells) and precipitation in the Rokytka catchment area. From the obtained data, the ratio of stable isotopes 2 H and 18 O was subsequently determined in the laboratory. We also worked with the data of stable isotopes 2H and 18O provided by the Department of Physical Geography and Geoecology of the Faculty of Natural Sciences of Charles University for the period 2014-2018. All data, together with hydro-meteorological data, were subjected to various analyzes and methods with the aim of evaluating the runoff. The core method of this work was hydrogram separation using a mixing equation working with stable 2 H isotopes and water temperature for 6 events. On the basis of the performed analyzes and hydrographic separations, it was found that the water in the Rokytka přítok during significant rainfall-runoff events is...
|
|
|
Tube headphone amplifier with USB DAC as an input
Rozkopal, Tomáš ; Schimmel, Jiří (referee) ; Vlček, Lukáš (advisor)
This thesis focuses on transferring of sound through USB bus. There is analysed a principal of the bus, it´s physical properties and a description of information transmission. Behaviour of the end point is described on an example of an audio device. The second part of the thesis describes demands on digital/analogue converters, their attributes such as resolution, speed of conversion and signal to noise ratio. Furthermore there are described two basic conversions between digital and analogue conversion. The third part of the thesis analyses a principal of tubes and explains a principal of vacuum diode, triode, tetrode and pentode. The individual types of tubes are supplemented by currently produced types and brief descriptions of their use in a circuit. Possible solutions of designing data transfer between a computer and an end point are discussed in the fourth part of the thesis. Different available microcontrollers are compared. The design continues with solving a problem with connecting a DA converter using I2S bus and there is also designed DA converter with voltage output. Demands for analogue filter and numerically derived main assumptions for end amplifier are explained in the final part of the thesis. Tube filter low - pass type is designed and possible solution of an end amplifier is discussed.
|
|
|
Registration database for IP nodes
Smrčka, Lukáš ; Vlček, Lukáš (referee) ; Komosný, Dan (advisor)
This thesis is focused on finding the physical location of stations by the passive geolocation techniques, particularly using the registration database of IP addresses. The first two part are focused on a theoretical analysis of this problem, the next two parts of this thesis deal with the solution of this problem and discussion of the results.
|
|
| |
|
|
The presence of pollutants in matrices of bioindicators
Vlček, Ladislav ; Vávrová, Milada (referee) ; Doležalová Weissmannová, Helena (advisor)
This master‘s thesis concerns with occurrence of heavy metals in the environment, mainly in the matrices of bioindicators. Special attention is given to occurrence of mercury in the environment and its quantification in bioindicators. Mercury and its compounds are today considered as one of the most significant contaminants in the environment. Some sorts of mushrooms cumulate sizable amounts of mercury in their fruiting body and therefore we can use them to consider loading of different areas. Eight areas in Vizovice and its surroundings were chosen for these purposes and during the years 2006 – 2008 harvested 50 samples from 19 sorts of mushrooms from there. The concentrations of Hg were determined in all samples by single-purpose absorption spectrometer AMA 254. Comparison of the mercury content between individual sorts of mushrooms in the same area as well as comparison of loading of areas was performed and also bioaccumulation ability of individual sorts of mushrooms was determined.
|
|
|
Sports and Relaxation Centre
Flodrová, Helena ; Vlček, Libor (referee) ; Utíkalová, Ivana (advisor)
Diploma thesis deals with new building sports and relaxation centre. Building is situated near Masaryk university campus in Brno-Bohunice. The building is two-storey, without cellar, set in a slightly sloping terrain at the back of the street Netroufalky. The building has two movement units. One unit contains sports hall and squash court and second unit contains cloakrooms, wellness part and administration. Structural system is cast-in-place concrete with masonry external wall of Porotherm. Internal wall are also from Porotherm. Sports hall with parabolic arch has steel structural system, that isn´t part of project. Curtain wall is covered with lamella Kalzip. Next to the building is parking place for clients.
|
|
|
Principal component analysis in power analysis
Jedlička, František ; Vlček, Lukáš (referee) ; Martinásek, Zdeněk (advisor)
This thesis deals with using principal component analysis in cryptanalysis by power side chanel. At first in this thesis is discussed cryptanalysis, cryptanalysis by power side chanel, principal component analysis method and interpretation received power consumption from performed differential power analysis on cryptographic device with AES algorithm. Practical part contain execution of own principal component analysis on received data and following try of differential power analysis thus adjusted data.
|
|
|
Software for learning support of error-correcting codes
Petrik, Ján ; Vlček, Lukáš (referee) ; Burda, Karel (advisor)
This Bachelor thesis is mainly focused on issues of the chosen error correcting codes (ECC) and their demonstrative. Goal of this work is help to understand ECC to readers, easy and reasonable form. We can find here a lot of illustrative tables and figures for better understanding how codes works. Every section constains one code and mostly is filled by code securing and code decoding. For every section interactive Aplet and program for experimental uses were created.
|
|
|
MultiProtocol Label Switching technology in Ethernet networks
Kiška, Martin ; Vlček, Lukáš (referee) ; Novotný, Vít (advisor)
In the introduction of this thesis the reasons for transition from older to a new technology called MultiProtocol Label Switching are mentioned – the modern technology enables simple network extension. The theoretical part contains basic principles of this techno- logy and their practical application for supplying private networks to the customers using provider’s network. In practical part packets are analyzed considering the theory. In addi- tion. All the technologies tested on a real network. Experience gained while working on this thesis are assessed during creating laboratory task for class Architecture of Networks intended for students of Bachelor’s study programme.
|
|
| |
guest ::
RSS feed.