National Repository of Grey Literature 40 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
Late Renaissance Polychoral Style and Its Contemporary Reception in Bohemia
Jurák, Pavel ; Baťa, Jan (advisor) ; Maýrová, Kateřina (referee)
This diploma thesis deals with the reception of the late renaissance polychoral style in Bohemia. The thesis firstly defines the term of cori spezzati and shows that this compositional technique has its origin in the first decade of the 16th century in Ferrara. Furthermore, it focuses on the composers in the St. Mark's Basilica in Venice, it analyzes their works and characterizes the Venetian polychoral style; it also mentions how the cori spezzati spread from the Apennine Peninsula beyond the Alps. The second part of the thesis is dedicated to the composers in Bohemia and to their polychoral works. The analyses of these works showed that many of the domestic composers were influenced by the Venetian polychoral style and some of them even by its Gabrielian brand. Key words: Andrea Gabrieli, Giovanni Gabrieli, Adam Michna z Otradovic, cori spezzati, polychoral, renaissance, church music, St. Mark's Basilica, Venice, Ferrara, Prague
Magnificat by J. D. Zelenka in the context of period composition
Jurák, Pavel ; Niubo, Marc (advisor) ; Hlávková, Lenka (referee)
The topic of this bachelor thesis is the analysis of Jan Dismas Zelenka's Magnificat D major and C major and their comparison with contemporary compositions. Firstly the thesis deals with the question what Magnificat is and with ways of its treatment in the history of music. Next an emphasis is put on the important events in the life of the Hofkapelle of Dresden, on the events which later influenced the conditions of Zelenka's works and their concrete shape. Also the Magnificats of Zelenka's and Heinichen's predecessors in the Hofkapelle are mentioned. Subsequently the thesis is concerned with both Zelenka's works of Magnificat and in the main part it compares them with another 33 Magnificats of great contemporary composers. The analysis showed a certain connection of the Zelenka's Magnificat C major with the Magnificat C major of Johann Joseph Fux and also the connection of the Zelenka's Magnificat D major with compositions of Johann David Heinichen. Key words: Jan Dismas Zelenka, Magnificat, Dresden, baroque, church music, Johann David Heinichen, Johann Joseph Fux, Nicola Porpora
Backhoe for tractor
Jurák, Pavel ; Červinka, Jan (referee) ; Škopán, Miroslav (advisor)
The aim of this thesis is a design of an additional excavator with side shift for agricultural tractor with power from 50 to 70 kW. The excavator is controlled by a hydraulic circuit. The main element here is an independent pump with a 40l / min supply, which is driven by a gearbox using a cardan shaft. The hydraulic circuit has been designed so that the temperature of the hydraulic fluid does not exceed the allowable limit. An important role is played by the connection to the tractor where was used a modified three-point hitch. This coupling of the tractor with the frame of excavator ensures sufficient rigidity when performing excavation work. When calculating the excavation resistance, was considered the soil of the 4th class, this is hard-to-disconnect soil or clay. The calculation implies that the machine can be used with backhoe buckets up to 500 mm wide. Strength analysis of boom was performed in Ansys Workbench 2019. Safety coefficients were determined for individual components. The overall safety coefficient is equal to 1.7.
SMV-2018-19: Systém for ECG analysis
Plešinger, Filip ; Jurák, Pavel ; Halámek, Josef ; Viščor, Ivo
A subject of this contracional research is development of algorithms for automated ECG processing from 1-lead ECG holters. Namely, it consists of:\n- development of algorithm for QRS recognition with focus on robustness against noise\n- development of classification algorithm to recognize arrhythmias, the algorithm is based on analysis of RR intervals and other ECG descriptors. The algorithm implements machine learning (neural networks). The input is Information related to QRS complexes and other descriptors extracted from ECG. The output is category of classified ECG block (atrial fibrillation, AB-block, non-quality signal, premature atrial contractions, premature ventricular contractions, sinus rhythm, supraventricular tachycardia and ventricular tachycardia)\n- Implemetation of these algorithms as software for .NET platform in C# language. It is optimized for multi-thread computers (computing server of the customer).\n
Efficient implementation of Stockwell Transform for real-time embedded processing of physiologic signals
Holmes, D. ; Pinto, S.C. ; Felton, Ch. ; Smítal, L. ; Leinveber, P. ; Jurák, Pavel ; Gilbert, B. ; Haider, C.
Physiologic monitoring enables scientists and physicians to study both normal and pathologic signals of the body. While wearable technologies are available today, many of these technologies are limited to data collection only. Embedded processors have minimal computational capabilities. We propose an efficient implementation of the Stockwell Transform which can enable real-time time-frequency analysis of biological signals in a microcontroller. The method is built upon the fact that the Stockwell Transform can be implemented as a compact filter bank with pre-computed filter taps. Additionally, due to the long tails of the gaussian windowing function, low amplitude filter taps can be removed. The method was implemented on a TI MSP430 processor. Simulated ECG data was fed into the processor to demonstrate performance and evaluate computational efficiency.
Hemodynamic modelling in the calf — A pilot study
Matějková, M. ; Jurák, Pavel ; Soukup, L. ; Halámek, Josef ; Viščor, Ivo ; Langer, P. ; Vondra, Vlastimil
With increasing age, the cardiovascular system loses its efficiency. The goal of this work was to investigate the hemodynamic system response to a head-up tilt test in two groups of different aged people. We used a model for describing this response in the right calf based on a non-invasive, non-occlusive, bioimpedance signal measurement technique. A decrease in the bioimpedance value in the calf during the head-up tilt test is associated with the accumulation of blood in the calf, which can be expressed by a model parameter. Subjects were examined in both a head-up tilt test and a supine position. 50 healthy non-smoking volunteers were divided into two groups according to age. The impedance signal during the tilt test for each subject was fitted by a model exponential function: Z0 model EF(t) =A exp(-t/B)+C, where Z0 model EF(t) is the calculated model of electrical impedance in the calf by an exponential function, A is the amplitude of impedance change, B is the time constant of the impedance decrease, C is the value of the steady state after the tilt test and t denotes time. A lower time constant B shows a faster filling of the vascular system in the investigated part. The Mann-Whitney test (p-value<;0.005) revealed that the time constant B for the older group was significantly lower than for the young group (145.24+/- 80.28 vs. 239.23+/-136.59 sec.). A lower time constant value means a faster response to blood filling in the lower limbs and directly reflects decreased vessel elasticity. This time constant was lower in the older group. The results show increased vessel stiffness in old age and could lead to a non-invasive evaluating the cardiovascular system state.
Biventricular pacing optimization by means of the dyssynchrony parameter
Jurák, Pavel ; Leinveber, P. ; Halámek, Josef ; Plešinger, Filip ; Postránecká, T. ; Lipoldová, J. ; Novák, M.
To improve Cardiac Resynchronization Therapy (CRT), different interventricular delay (VVD) settings can be used. However, relatively small VVD induced hemodynamic changes cannot be measured by standard echocardiographic methods. The QRS complex duration (QRSd) is mostly the main criterion. Here we introduce a new dyssynchrony parameter (DYS) that is able to more accurately detect improved electrical synchrony. Methods: 12-lead 5 kHz ECG during 3-10 minute rest period was measured in 46 patients with CRT OFF and CRT ON with VVD 0 ms (CRT0) and -20 ms (CRT20). We detected QRSd and the dyssynchrony parameter DYS as the time difference between 500-1000 Hz averaged envelopes positions in the V1 and V6 leads in the QRS complex region. Results: 32 of 46 patients had a positive CRT response manifested by QRSd shortening and a DYS decrease. 28 of 32 patients had a positive LV pre-excitation effect: additional QRSd shortening of 4.7+/-.9 ms and a DYS decrease of 12.6+/-7.5 ms. The correlation coefficient of QRSd and DYS changes (CRT 0 vs CRT 20) was 0.23 and indicates information diversity. The DYS parameter differs from QRSd and provides a significantly higher response to VVdelay changes (p <; 0.001).
Desk for splitting semiautomatic
Jurák, Pavel ; Vlašic, František (referee) ; Dvořáček, Jiří (advisor)
The subject of the bachelor thesis is the design of the working table, which will ensure the stem lifting and its transport to the splitting semi-automat. Lifting of stem with weight up to 500 kg is ensured by lifting arms. Then, the stem is moved to the splitting semi-automatic by means of a belt conveyor. The design of the frame is designed to withstand a load of 5000 N. The lowest security has k = 1.2 according to the strength analysis. The table frame can be easily folded using a hydraulic cylinder. Thanks to this we can easily mount the frame behind a splitter semi-automatic and transport both devices at the same time.

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17 JURÁK, Pavel
4 Jurák, Petr
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