|
|
Acute effect of head down tilt on blood pressure and haert rate
Tolar, Jan ; Radvanský, Jiří (advisor) ; Procházka, Michal (referee)
Whereas the effects of a long-term activity of head-down tilt (HDT) in the angle between 3ř and 12ř were examined in details in cosmic medicine as the model of a state of weightlessness, literature concerning effect of HDT on cardiovascular control in the angle over 30ř is scarce. The aim of the thesis is to examine acute reaction of systolic, diastolic, mean arterial blood pressure and heart rate during three minutes of 30ř, 50ř and 70ř HDT, realized on a tilt (inversion) table with fixed legs. For the combination of HDT and head-up tilt (HUT), the following protocol was chosen: 5 minutes lying in a horizontal position (HOR), 3 minutes of 70ř HUT, 3 minutes of 30ř HDT, 3 minutes of HOR, 3 minutes of 50ř HDT, 3 minutes HOR, 3 minutes of 70ř HDT, 3 minutes HOR and 3 minutes of 70ř HUT. A non-invasive continuous Peňáz method, using Finapres Ohmeda, was used to monitor beat-by-beat blood pressure and heart rate. Blood pressure was also measured by sphygmomanometer each minute for calibration. In the angle of 30ř HDT, there was a significant decline of heart frequency (p < 0,01). During the 50ř HDT, there was a significant rise of systolic blood pressure in the third minute, of diastolic and mean arterial pressure each minute and the heart rate dropped significantly (all p < 0.05). In the 70ř HDT,...
|
|
|
Comparison of senzitivity of the Omron HJ - 720IT pedometer according to the location on the body
Bohdanová, Markéta ; Slabý, Kryštof (advisor) ; Procházka, Michal (referee)
The aim of this study was to compare the accuracy of a biaxial piezoelectric pedometer Omron HJ-720IT according to a position it was attached to on a body with a classic spring - levered pedometer Yamax SW-200, which was approved to be valid in previous studies. The Total of 57 probands (39 females and 18 males) participated in the study, which contains 3 parts. In the first part the pedometers were tested in a self - paced walking condition ("slow", "moderate" and "very brisk" walking) on a track of 135 m in length. The second part included four-minute sections of walking on a treadmill under controlled conditions at following speeds: 3.2, 4.8 , 6,4 and 7,5 km.h-1 and slopes: 0 %, 5 % and 10 % and two fifteen-minutes sections at 4km.h-1 with no inclination and 6 km.h-1 with 5 % slope. The third part was aimed to record artifacts while going by bus. At no position at speed 4.8 km.h-1 the 1 % error was exceeded. The highest accuracy was achieved with Omron on a belt of(above) a SIAS. It is also reliable in counting of aerobic steps at this position. While going by bus it counted 3 steps/min at most at all positions. Omron Pedometer HJ-720IT proved validity and reliability at various mounting positions under self-paced and prescribed walking conditions. Keywords: pedometer, Omron, Yamax, physical activity,...
|
|
|
CHR-test-method of excercise testing by endurance sportswomen related to renal functions
Šturmová, Anita ; Radvanský, Jiří (advisor) ; Procházka, Michal (referee)
The aim of this study was to familiarize and imlement methodics of CHR-test. For using exercise testing were used endurace trained women. The results of exercise testing were compared with previously published study for untrained probands. The paper discussed resulting indexes of testing depending on individual fitness and the conslusiveness itselfs of this type of testing, that is not expanded to date. The next part of the thesis presents the results of experimental work: relations between stress and reaction of kidney in the form of microalbumiuria and transferinuria. Powered by TCPDF (www.tcpdf.org)
|
|
|
The effect on respiration parameters by the the co-activation of diaphragm with ather muscles of the torso during physical exertion
Hellebrandová, Lenka ; Procházka, Michal (referee) ; Šafářová, Marcela (advisor)
The impact of the work "Affecting of respiratory parameters by co-activation of diaphragm with other trunk muscles" was to confront actual knowledge and relation between postural and respiratory kinesiology, observe interconnection of their control by the central nervous system and their participation during ontogenesis. The influence of respiratory motor pattern on respiratory functions and on relationship between postural and respiratory system within pathology of respiratory function was measured by a spirometric, a spiroergometric and a functional examination of locomotor system. The study was carried out using a group of probands, who were selected according to the spirometric and the spiroergometric examinations. Some of them had the values of spirometric parameters either at the limit or outside the limit of reference values. Powered by TCPDF (www.tcpdf.org)
|
|
|
The aspects of optimal weekly physical exercise
PROCHÁZKA, Michal
This thesis focuses on the health aspects of physical stress and points to possible problems in the case of no or on the other hand exaggerated physical activity. The work is based on an analysis of Czech and foreign professional literature that relates to the issue of the contemporary physical activity and its health aspects. In this work, I found that the author, who follow up physical activity, concur in the opinion that regular physical activity has many positive aspects (physiological, psychological but also social) on the body, but with prerequisite for the proper dosage. Physical activity may arise injury, or pathological condition associated with hard excercises (overtraining, overvoltage). The authors clearly agree we recommend aerobic activity rate 3-5 exercises per week. The execution time of individual operations depends on the intensity of activities performed. In various publications can be found with different recommendations duration of action, but all authors agree that if the activity is carried out by a lower intensity, it should be longer respectively, less time for intensive activity. Low intensity physical activity should take at least 45 minutes, load of medium intensity 30-60 minutes, high intensity exercise requires a maximum of 20 minutes. The time of exercises is variable with respect to the current state of the individual. It is appropriate to switch between different physical activities, alternating aerobic and strengthening exercises. The most convenient way is the inclusion of two days a week to fitness exercise plan, which will strengthen large muscle groups. In this work, I sort through and systematically elaborated health aspects accompanying physical exercises, pointed to changes in the body corresponding to the use of physical activity.
|
|
|
Color sensor for feedback control of press
Procházka, Michal ; Macho, Tomáš (referee) ; Petyovský, Petr (advisor)
This thesis builds on the semestral thesis, which deals with color processing theory and research available hardware for solution. The introduction discusses the basic theories on color models, which is an outline of how the award for the color models can be programmed. The second part is focused on different hardware components and control elements, RGB sensor, TWI communication, imaging units and USART. These components are always describes the basic software functions. At the end of the thesis describes the measurement as a whole. At the very end of the work is to think of it as a given topic more appropriately extended.
|
|
|
Mobile germicidal source
Procházka, Michal ; Murina, Milan (referee) ; Steinbauer, Miloslav (advisor)
Germicidal light is a type of UV light which is able to kill bacteries and microorganisms. These germicidal lamps usually operate on the same principle like common fluorescent lamps but they emit the different spectra. For higher efficiency and longer lamp life it is desirable to use electronic ballast as a source for germicidal lamp which in version of integrated circuit offers further advantages. First part of the thesis describes the theory of UV desinfection and electronic ballasts. The second part is about the construction of the mobile germicidal source. In the last part of the thesis there is the germicidal mobile source tested against a few various mildews.
|
|
|
Valuation of Baťa, a.s
Procházka, Michal ; Bernát, Michal (referee) ; Beranová, Michaela (advisor)
The aim of the master’s thesis is to valuate comapny BATA, a.s. using income – based valuation mmethods. Thesis is dividend into two parts, theoretical and practical. Theoretical part describes basic charakteristics of the terms, defines company and its value, overview of invidual methods and procedures used for valuation of the company. Practical part is focused on application of theoretical knowledge in practise. The master’s thesis contains economical analysis, especially strategic analysis, financial analysis and preliminary valuation of comapany based on value generators. Company value was based on two yield methods, especially method of discounted cash flow entity and method of economic addend value.
|
|
|
NQR spectroscopy - design of measurement methods
Procházka, Michal ; Bartušek, Karel (referee) ; Steinbauer, Miloslav (advisor)
Nuclear quadropole spectroscopy is a modern analytical method for detecting specific solid state materials, e.g. explosives, drugs etc. It uses phenomenon of atomic nucleus called nuclear quadrupole moment. NQR method is very similar to common nuclear magnetic resonance (NMR) that is why major principles are explained using NMR. The thesis deals with basic principle of NQR, its usage for explosives detection and also detection of other chemical compounds and many other useful applications. The thesis deals with specific circuit design, techniques for sufficient sensitivity, impedance matching and circuit isolation. Practical part consists of simulations as well as designs of a few impedance transformers, pi-networks, and coils. Also experimental probe was created. In the last part, NQR workplace was assembled and a few chemical compounds were detected. These were KClO3, NaClO3 and NaNO2 . Finally minimum detectable amount of potassium chlorate as the strongest signal of these was determined.
|
|
|
Diagnostics of thin layer deposition using dimethylphenylsilane monomer
Procházka, Michal ; Kudrle, Vít (referee) ; Krčma, František (advisor)
The aim of this thesis is a study of processes during organosilicone thin film deposition via plasma polymerization. Recently, thin films are the most expanding way of surface modification of materials. They are used as protective coatings, functional layers, they can increase or decrease adhesion to different compounds (e.g. water), or just improve mechanical properties of bulk materials. Plasma polymers, which are not known so long, are a modern trend in evolution of thin film deposition. They have perfect adhesion to the substrate and they are highly resistant against most of chemical compounds. Their structure is quite different from the structure of classical polymers. Recently, organosilicon compounds are used as precursors for plasma polymers because silicon built in the structure of plasma polymer allows thin film deposition on glass substrate and the organic part of monomer gives us infinite possibilities of modification. In our case dimethylphenylsilane (DMPS) was used as a monomer. Various RF low pressure discharges were used during this study. Plasma diagnostic was performed by optical emission spectroscopy of inductive coupled plasma. This method allows us to determine plasma composition during the deposition process. Thus we can predict the composition of deposited thin film according to input parameters. From relative populations of fragments we are able to find out optimal conditions for deposition process. We can also calculate temperature of particles in plasma which gives us some information about particle energies. The first part of the study deals with the identification of particles (fragments) created by fragmentation of monomer in plasma environment. We successfully identified hydrogen atomic lines of Balmer’s series in the spectra. Many rotational lines of hydrogen molecule were also detected. Atomic carbon occurred only in small amount. Much more carbon was detected in the form of CH radical. We also found some weak lines connected to atomic silicon. When we used a mixture of DMPS and oxygen, OH radical and O2+ were present in spectra. Next, optimal settings of deposition were determined for particular fragments from relative intensities of these fragments in optical emission spectra. Using this information we are able to set up the process to deposit thin films of desired composition and properties. We calculated electron temperature from intensities of hydrogen lines in Balmer’s series. Rotational temperature was obtained from CH radical intensity. Unfortunately, there was no convenient radical from which intensity we would be able to calculate vibrational temperature. All results and information obtained during the research can be used in industrial plasma polymerization processes and development of new coatings and functional thin films. Other studies on DMPS or similar monomer may also be realized to get more knowledge about processes in plasma and this thesis could serve as a basis for further research. Moreover, this study is a part of an international project. The aim of this project is to study processes during plasma polymerization both theoretically and practically. Once finished, the project and its results will be presented in scientific literature and at international conferences.
|
guest ::
RSS feed.