National Repository of Grey Literature 491 records found  previous11 - 20nextend  jump to record: Search took 0.01 seconds. 
Estimation of damping in human vocal folds vibration: measurements in vivo and on model
Horáček, Jaromír ; Radolf, Vojtěch ; Bula, Vítězslav ; Košina, Jan ; Geneid, A. ; Laukkanen, A. M.
This study investigates the biomechanics of the end-part of phonation, i.e. the so-called phonation offset, experimentally. This information of vocal folds damping is important for testing and further development of mathematical modelling of phonation. The measurements of the damping ratio, based on high-speed videolaryngoscopic registrations, were realized in vivo on a male subject and in vitro using an originally developed silicon replica of the human vocal folds. In both cases the results show remarkable decrease of vibration frequency of the vocal folds and increase of damping ratio D in the phonation offset limiting to the values D=0.12 in vivo measurement and D=0.11 in vitro measurement. The results for vocal folds’ damping are in good agreement with previous measurements performed in humans using different methods.
Manufacturing of aquaria Brno
Horáček, Jan ; Mikeš, Stanislav (referee) ; Nový, Alois (advisor) ; Bečkovská, Tereza (advisor)
The subject of this bachelor thesis was to design a new aquarium manufacture in Brno for Pavlica corporation. Project is based on architecture study done in subject AG035 Architecture design studio undertook in the sixth semester of bachelor´s study. The plot is located to the south of Brno in Horní Heršpice by the Sokolova Street. There are factory buildings in the wider neighbourhood but in the immediate area around the plot there are prevailing residential buildings and a railway. Civic facilities can be found in the walking distance. The area is classified as a brownfield intended for building. The plot has a slight slope in the direction of Sokolova Street. The building is designed in the shape of the letter “U”. Two story administration part and representative part dedicated to the public can be found in the front of the object. Main manufacture hall is connected to administration part and is linked to the exterior via section gate. Perpendicularly to the main manufacture hall is carpentry with storage and waste. The carpentry is also linked to the exterior via section gate. The section gates lead to manipulation yard in the back of the plot which is connected to Sokolova Street via road. There is a parking lot situated along this road. The façade of the building is created from advanced glass wall with designed support system. In the centre of the building is semi-public atrium with garden.
Truck Braking System
Horáček, Jonáš ; Hejtmánek, Petr (referee) ; Blaťák, Ondřej (advisor)
The aim of this bachelor thesis is to examine truck braking systems and their components due to the construction and to describe their cooperation. The first part deals with brake definition and with dividing brakes into different categories. The second part focuses on compressed air brakes, truck trailer brakes and retarders. The thesis has a research character and the last part deals with possible trends in the development of truck braking systems.
Perfusion studies
Ulman, Attila ; Pelikán, Josef (advisor) ; Horáček, Jan (referee)
Perfusion data (dynamic contrast-enhanced image data) are used to characterize regional tissue perfusion. Perfusion data consist of a sequence of images, acquired after a contrast agent is applied. Perfusion studies are used for diagnostic purposes in oncology, ischemic stroke assessment, or myocardial ischemia. The diagnostic evaluation of perfusion data is challenging, because the data is very complex and exhibits various artifacts (e.g. motion). Important aspect in the diagnosis of perfusion data is the correlation between perfusion data and derived time-intensity curves (TIC) as well as with other image data, in particular with high-resolution morphologic image data. The present work is focused mainly on cerebral, brain perfusion studies. The thesis studies their medical background as well as the process and possibilities of their examination. Discusses different ways of processing of perfusion series and designs own approach. The work also includes an overview of possibilities for every single step of the processing procedure (registration, segmentation, analysis and visualization) and selection of the most suitable approach for the particular part of processing in the context of cerebral perfusion studies. Results of the work also include a multiplatform application enabling study and analysis of...
3D Physics Toolbox with Haptics Support
Čermák, Jakub ; Kmoch, Petr (advisor) ; Horáček, Jan (referee)
The main goal of this thesis is to create software which would allow a user to simulate and study physical processes in systems of mass particles, which follow laws of classical mechanics and can collide together. The simplicity and easiness of control was emphasized, which corresponds to support of haptic devices, which can be used both for influencing running simulation and creation of the scene. It is possible to change parameters in physical properties of objects and environment (like gravitation or air density) and also to visualize affecting forces and other properties. It allows the user to explore physical processes. This work uses knowledge from many fields - mass particle mechanics, numerical integration used for application of physical laws, algorithms for effective collision detection and haptic interaction and force rendering.
Volumetric data processing for CT enterography
Horáček, Jan ; Pelikán, Josef (advisor) ; Czanner, Silvester (referee) ; Schier, Jan (referee)
Title: Volumetric data processing for CT enterography Author: Jan Horáček Department: Department of Software and Computer Science Education Supervisor: RNDr. Josef Pelikán, Department of Software and Computer Sci- ence Education Abstract: The overall goal of our work is to develop algorithms for efficient processing, segmentation and tracking of the small intestine in CT enterography scans. The small intestine is a complex organ, the shape of which can vary con- siderably between patients: and in addition to this, its location and shape can change significantly between subsequent scans of the same person. The CT en- terography process uses contrast agents to improve the visibility of the intestine, so that various potentially problematic features, such as inflammations, obstruc- tions and so on, can be properly seen. However, due to the convoluted shape of the organ, manual diagnosis of raw CT enterography data is still a difficult and time-consuming task, and is prone to diagnostic errors. We have prepared a set of methods for automatic preprocessing, segmentation and tracking of such data that aims at providing a much clearer data visualization: such tools can greatly improve the diagnostic process. Our first contribution is to make a high quality denoising method for volumet- ric data practically usable: so...
AudioCam
Hrinčár, Peter ; Horáček, Jan (advisor) ; Libič, Peter (referee)
The thesis deals with the problem of creating music through movement. Our aim is to implement software that allows the user to control a virtual musical instrument using a webcam. We focus primarily on universal interface controlled by movement. Using the differential motion analysis method and optical flow we obtain the information about a movement. Based on this information the virtual instrument creates tones using MIDI technology. Specifically, we simulate a virtual keyboard on which the user can play. We designed the virtual instrument in such a way that it could be easily extended in the future with other approaches to the process of creating music.
Structure and dynamics of electronic defects in liquid water
Maršálek, Ondřej ; Jungwirth, Pavel (advisor) ; Horáček, Jiří (referee) ; Pittner, Jiří (referee)
Title: Structure and dynamics of electronic defects in liquid water Author: Ondřej Maršálek Institute: Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic Supervisor: prof. Mgr. Pavel Jungwirth, DSc. Supervisor's e-mail address: pavel.jungwirth@uochb.cas.cz Abstract: In this thesis we present ab inito molecular dynamics simulations of two different electronic defects in water. Photoionization of liquid water produces a cationic hole, which undergoes ultrafast dynamics and forms the hydrated proton and the hydroxyl radical as its products. We study both the dynamics and spectroscopy of this process. The hydrated electron is a key intermediate in radiation chemistry of aqueous systems. We simulate its equilibrium properties in anionic water clusters as well as the dynamics of vertical electron attachment to cold and warm clusters. The hydrated electron reacts with a hydrated proton to form a hydrogen atom. We examine this reaction at a finite temperature in a larger cluster as well as in more detail in a smaller cluster. Because both of the electronic defects studied here are challenging open-shell species, we put emphasis on benchmarking and testing our computational setup. Six published articles are attached to the thesis. Keywords: density functional theory,...
Automatic analysis of videokymographic images by means of higher-level features
Zita, Aleš ; Zitová, Barbara (advisor) ; Horáček, Jan (referee)
Human voice diagnosis is a complicated problem, even nowadays. The reason is poor access to the body itself and the high frequencies of vocal fold vibrations. One of the clinically available imaging methods to address these problems is Videokymography - a technology for capturing the vocal fold vibrations using a special line CCD camera. Individual lines stacked on top of each other form videokymographic recording. Videokymographic images are suitable for automatic characteristics extraction, therefore helping to reduce the laryngologist workload. For this purpose, the set of such methods is being developed in the Department of Image Processing in the Institute of Information Theory and Automation of the Academy of Science of Czech Republic. The ventricular band position and shape determination is one of the important, but difficult, tasks. The aim of this thesis is to propose new method of automatic detection of ventricular band on videokymographic recording using digital image processing techniques.

National Repository of Grey Literature : 491 records found   previous11 - 20nextend  jump to record:
See also: similar author names
6 HORÁČEK, Jakub
6 Horáček, Jakub
18 Horáček, Jan
1 Horáček, Jan Jiří
68 Horáček, Jaromír
11 Horáček, Jaroslav
25 Horáček, Jiří
1 Horáček, Jonáš
Interested in being notified about new results for this query?
Subscribe to the RSS feed.