National Repository of Grey Literature 26 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Thin accretion disk structure equation in a general metric
Hrubeš, Jan ; Bursa, Michal (advisor) ; Horák, Jiří (referee)
In the physics of accretion disks around extremely massive objects, the effect of spa- cetime curvature is manifested on the behaviour of gas and radiation. Black holes and the accretion disks around them are commonly described by the Kerr metric. However, other metrics are being tested to see if their predictions correspond better to real astronomical objects. The aim of this thesis is to generalize the description of the accretion disk develo- ped by I. D. Novikov and K. S. Thorne for a general stationary axially symmetric metric. The results are then verified by substitution of the Kerr solution. In the last section the equations are solved for the stationary axially symmetric metric with charge parameter. 1
Ecological Issues in Czechoslovakia
Hrubeš, Jan ; Vaněk, Miroslav (advisor) ; Valeš, Lukáš (referee) ; Novák, Arnošt (referee)
Práce se zabývá vývojem ekologického hnutí v Československu. Svoji pozornost zaměřuje především k vývoji ekologických iniciativ a ekologického diskurzu v době komunistické nesvobody a v době celospolečenských změn v listopadu 1989 do období rozpadu Občanského fóra v roce 1991. Nedílnou součástí je rovněž analýza vzniku a vývoje Strany zelených, která se stala předmětem scénářů a pokusů o provedení politických reforem v rámci komunistického režimu. Cílem práce je zjistit, jak téma ochrany přírody rezonovalo především v oblasti opozičních a režimních struktur a jaký osud jej následoval v období porevolučního vývoje následovaný otázkou, proč došlo k postupnému úpadku ekologického povědomí ve společnosti. Ke splnění cíle práce byla využita metoda orální historie, jež zprostředkovává pohledy oslovených narátorů - pamětníků problematiky úlohy ekologické karty. Tímto přístupem se snaží nahradit především chybějící archivní materiály. Formou obsahové analýzy a komparace se práce pokouší srovnávat procesy probíhající v západní Evropě s ekologickou tématikou v Československu. Práce se oborově nachází na pomezí historie, politologie, ale také sociologie, přičemž zdůrazňuje akcent historicko-politologický. Ze závěru práce vyplývá, že ekologická karta v rámci československé společnosti získala silnou tradici,...
QRS detection using zero crossing counts
Kašák, Pavel ; Hrubeš, Jan (referee) ; Vítek, Martin (advisor)
This thesis is focusing on problems of detection of QRS complex. It includes basic description of ECG signal. It acquaints with common methods of searching QRS complex. Main attention is paid to detection based on zero crossing counts, which is realized by MATLAB program. This algorithm is then tested on CSE database, optimised and its efficiency is evaluated.
Transformation of ECG leads
Kaspar, Pavel ; Vítek, Martin (referee) ; Hrubeš, Jan (advisor)
Transformation of ECG The aim of this work is to get acquainted with the means of transformation of ECG, and to execute Dower transform and evaluate it’s efficiency. Then, to design and realize a new way of forward and reverse transformation of ECG in MATLAB program for the purpose of data compression, and to evaluate its functionality with signals from CSE database.
Compression of ECG signals
Kašpárek, Jan ; Kozumplík, Jiří (referee) ; Hrubeš, Jan (advisor)
This thesis contains general description of several basic compression algorithms used either for lossy and lossless compression. These algorithms are runlength encoding, Lempel-Ziv, Huffman encoding, Move-to-Front, wavelet transform and Burrows-Wheeler transform. Aim of this thesis is creation of ECG compression algorithm with implementation of runlength encoding and BWT. Another technique used in algorithm is wavelet transform. The algorithm is written in programming environment MATLAB.
Methods of Bloodcells Counting
Pavlík, Jan ; Provazník, Ivo (referee) ; Hrubeš, Jan (advisor)
At present, the standardization of morphological examination of cytological preparations appears to be very difficult. Digitization and development of computer technology makes it possible to find a suitable solution for the effective processing of cytological samples. Company Cellavision, in collaboration with leading morphologist, developed a device Cellavision DM96, which uses image capture of blood cells for their morphological diagnosis and subsequent archiving. It is of great importance to focus on this system and examine its use in clinical practice. The results obtained by two different methods were statistically processed and evaluated.
ECG noise generator
Mikuláš, Karol ; Kozumplík, Jiří (referee) ; Hrubeš, Jan (advisor)
Real ECG signal contains undesirable artifacts arising from its capture. Due to loss of diagnostically useful information in the noise signal and followed by the filtering the signal is important to know the characteristics, the most common symptoms and causes, to avoid or minimize the noise ECG signal. ECG noise generator is an educational program designed to serve the learning methods of filtering the noise signal. The user program can verify the effectiveness of the chosen method and the extent of deformation of the useful signal. The program includes basic types of artifacts, such as powerline interference, baseline wander, drift, impulse noise, myopotentials and change of baseline wander of ECG signal, which can be prepared noise signal from a database or other signal selected by the user.
ECG noise generator
Kachlík, Miloš ; Vítek, Martin (referee) ; Hrubeš, Jan (advisor)
The aim of this work is to create the ECG signal noise generator in system MATLAB to verify the correct functioning of filtering methods. When the ECG signal is filtered, it can occur to its deformation. Differences before and after filtration are clearly visible, when it used a pure ECG signal. Well-defined interference is most appropriate for this purpose, because interference parameters are known and properties of filtering methods can be modified to achieve the maximum efficiency while the ECG signal shape distortion was minimal. Created program implements the basic types of ECG signal interferences, powerline interference, myopotentials, electrode artifacts and baseline wander.
Modern methods of QRS detection
Richter, Zdeněk ; Hrubeš, Jan (referee) ; Vítek, Martin (advisor)
This work deals with ECG signal and its processing methods. Describing ways of ECG measuring and reports in detail its parts. Next chapter compares some QRS detection methods. One of the sections presents usual testing databases and comparison of described methods. The important part of this bachelor’s thesis is about analysis and design method, which perform detection of QRS complex using counting zero crossings. The last section of the text deals with realization of this method in matlab user interface, determine its success and comparison with other methods.

National Repository of Grey Literature : 26 records found   1 - 10nextend  jump to record:
See also: similar author names
4 Hrubeš, Jakub
2 Hrubeš, Jaroslav
Interested in being notified about new results for this query?
Subscribe to the RSS feed.