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Slot Antenna Array Based on Substrate Integrated Waveguide
Sedláček, Petr ; Polívka, Milan (referee) ; Mikulášek, Tomáš (advisor)
The Master’s Thesis deals with the design of slot antenna array based on the substrate integrated waveguide (SIW). Various supply methods are described and the design procedure is approached. The antenna array was designed for Wi-Fi band of 5 GHz in the Ansoft HFSS simulation software. The optimalized parameters are impedance bandwidth (low reflection coefficient at antenna input in the desired frequency band) and the gain (the maximum value). As the result of the work 3 antenna arrays based on the substrate integrated waveguide are designed and fabricated: antenna arrays 2x1, 2x2 and antenna array 2x2 supplemented with housing for outdoor use. The work also contains a comparison of simulated and measured parameters of antennas.
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Nursing Care of Klients with Fractured Distal Femur
VOPÁLKOVÁ, Milena
The name of this Bachelors thesis is "Nursery Care of Patients with Fractured Distal Femur". With view to the lengthening of the populations age, increasing popularity of adrenalin sports and development of traffic we can expect an increasing number of this serious type of injury, and therefore it is time to address the issues of nursery care of the clients with this type of fracture. Fracture of the distal part of femur often happens suddenly and unexpectedly and the client has to deal with a health problem, which brings about a lot of changes as regards his/her health, psychic and social situation. The purpose of this thesis is to map the nursing specifics and nursing problems experienced by clients with a fractured distal femur from the nurses point of view. Through an analysis of a research survey we will summarize the thesis outcomes and determine the specifics of possible complications under the nursery care of such clients. Hence, the thesis contains two fundamental parts: theoretical and empirical. The theoretical part deals with the historical development of nursing and care provided as regards these fractures, the anatomy of lower limbs and causes of such fractures. It also addresses the basic classification of such fractures, principles of an osteosynthesis therapy, education, nursing and rehabilitation care. The empirical part includes a research survey with two predetermined goals mapping the specifics and complications within the nursing care of clients with a distal femur fracture. With view to the fact that various specifics and complications within the nursing care in the period before and after surgery were ascertained, they were categorized as pre-surgery and post-surgery specifics and complications. The research survey found out that one specific is differing pre-surgery nursing care of the clients with a fractured distal femur, mainly provided that stabilisation of the fractured part is executed by means of a skeletal traction or a patch traction or through a knee brace. The ascertained nursing complications are related to such immobilization interventions. According to the interviewed nurses the nursing procedure is even more diverse, mainly as regards the injured clients mobility and the nursing care. Other specifics of the nursing care are monitoring of locomotion and sensitivity of the traumatized lower limb, antidecubitus care, aself-care deficit and a possible risk of the lever action impact on the distal femur when moving on the bed. Specifics of the post-surgery nursing care regarding clients with a knee brace are: monitoring of locomotion and sensitiveness of the lower limb, correct manipulation with the knee brace, care of the locomotion, a risk of the lever action impact on the osteosynthesis area mainly when the client is sitting on the bed with lowered limbs or doing exercise on the motor splint. Nursing complications ascertained during the post-surgery period are mainly an oedema and a haematoma of the surgical wound place, urine and faeces emptying disorders, inadequate relief of acute pain, decubites under the knee brace or on the heels, long-term deficit of the clients self-care due to the traumatic consequences and other possible complications as described in this thesis. Outcomes of this thesis are two simple mind maps, which are a part of this thesis. The first mind map shows the nursing care specifics as regards a client with a fractured distal femur and the second describes the most frequent complications and interventions of a nurse within the nursing care as regards a client with a fractured distal femur. The outcomes of this thesis can serve as an information material for traumatology unit nurses and also for nurses working in other complements.
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Analysis of the transmission in the mobile digital audio broadcasting
Kresta, Daniel ; Ulovec,, Karel (referee) ; Kratochvíl, Tomáš (advisor)
This thesis deals with an analysis of a system called Digital Audio Broadcast and describes its mathematical model created in MATLAB program. In the first part basic blocks of a transmitter and a receiver are analyzed along with their principles. Then different types of transmission channels for static, portable and mobile receivers are described. The second part contains description of the DAB mathematical model itself. Individual blocks are described in the order of the DAB signal path, from the transmitter through the transmission channel to the receiver side. In this part the graphical user interface is also described. In the final part the results of experimental measurements and simulations are presented.
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Implementation of 1D mathematical model of vocal cavities into TTS synthesizer – preliminary study
Radolf, Vojtěch ; Horák, Petr
Simplified 1D mathematical models of the human vocal tract were modified for using them in Text-To-Speech systems so that they help to simulate emotional speech. The geometry (area function) of the models for all Czech vowels was modified using the inverse task optimization procedure so that the computed formant frequencies match the measured formant frequencies of utterances of professional speaker. Output acoustic pressure signal generated from the models in wav format sounded satisfactorily for all the vowels and fundamental frequencies varied in an octave range from 77 Hz to 156 Hz. Neverthelles more testing procedures are needed to verify reliability and quickness of the model as well as intelligibility of generated utterances especially in formant TTS system and linear predictive TTS system.
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The aplication of CSS in swimming flume
Cagaň, Štěpán ; Jurák, Daniel (advisor) ; Chrzanowská, Babeta (referee)
Title: Application of CSS (Critical Swimming Speed) in the swimming flume. Objectives: Purpose of our pilot study was to find out, if load during swimming on speed of anaerobic threshold in the flume on level validated by accredited workplace corresponds with load during swimming in the swimming pool. Methods: For verification of our purpose, for each proband we first determined speed of anaerobic threshold, using Critical Swimming Speed protocol. Subsequently we monitored values of blood lactate and heart rate during swimming on anaerobic threshold speed level in the pool and thereafter in the flume. We have compared measured values. Results: We found out, that load in the flume is much lower, than load in the pool. We also found out, that stream of water in flume is not constant. Keywords: flume, swimming, swimming simulator, lactate, front crawl stroke, critical swimming speed
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Analysis of the Impact of Fixed Obstacles near Roads on the Course of Traffic Accidents
Hejsková, Veronika ; Semela, Marek (referee) ; Panáček, Vladimír (advisor)
This thesis named Analysis of the impact of fixed obstacles near roads on the course of traffic accidents deals with the diversification of fixed obstacles near the roads, brief theory of road accidents, possible consequences and shows statistics of road accidents with a fixed obstacle. The aim is to perform analysis of real traffic accidents with a fixed obstacle with serious consequences for health, life and property and with the help of a computer simulation software to analyze the same accident again, but for the condition if the fixed obstacle was removed. Finally, the consequences of accidents are compared, the analysis are evaluated and the proposed measures to eliminate the consequences are assessed.
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Using cloud-based technology in company: Decision making model for selection of the groupware
Topolová, Ivana ; Kubálek, Tomáš (advisor) ; Doucek, Petr (referee) ; Hnilica, Jiří (referee)
The thesis deals with decision-making about how to operate the system for communication and collaboration in a company - groupware. Compares two different ways of operating systems. Using cloud-based services and systems which the company operates on its own hardware. In the thesis the decision-making model is created. The essential criterion for decision making are total cost of ownership (TCO), the work therefore contains a procedure to calculate the TCO. Decision-making model and the calculation procedure is tested using simulation and in the case study. The simulation also responds to issues of economic suitability cloud-based systems in small and in large companies.
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Physiological equivalent temperature as an indicator of the UHI effect with the city of Prague as an example
Zahradníček, Pavel ; Žák, M. ; Skalák, Petr
Description of an Urban Heat Island (UHI) using the difference in air temperature is one of the world's most studied characteristics. If, however, one wants to express how the temperature is perceived by humans, one must consider the overall effect of air temperature, wind speed, air humidity and radiation flows, which is expressed using temperature bioclimatological indexes. One of them is the socalled physiological equivalent temperature (PET), which is used for quantification of the overall effect of meteorological parameters combined with human energetic balance and which is perceived by humans. The RayMan (MATZARAKIS et al. 2007, 2010) microscale models in the city of Prague were used to simulate biometeorological conditions describing the effect on humans using PET.
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The evaluation of critical factors for the BTT method measurement
Maturkanič, Dušan ; Košina, Jan ; Hodboď, Robert
The report describes an analysis of critical factors occurred during the Blade Tip-Timing method measuring. These factors are represented by speed fluctuation of model turbine wheel and accuracy of sensors of the vibrodiagnostic system. This analysis is focused on evaluation and comparison of these items in different conditions. Subsequently, the results can be used for the simulations of vibration of turbine blades.
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Powertrain Vibration Modelling using Virtual Prototypes
Prokop, Aleš ; Bauer, František (referee) ; Dundálek, Radim (referee) ; Novotný, Pavel (advisor)
This work deals with the matter of powertrain vibration reduction, focusing on the transmission. These units, depending on the purpose of utilization, consist of a high number of dimensionally complex components. These need to possess features, selected already in the design phase, which would guarantee smooth and quiet operation. A properly designed tooth profile and the related specified accuracy of manufacturing are one of the most important features. The basic function and the purpose of transmissions application indicate a relatively wide range of operating speeds and transmitted loads. Moreover, combination of both loading with improperly designed string’s parameter can cause a number of various problems. The vibration initiation with related noise from gear mesh belong to the most significant sources of issues. There are multiple mechanisms of oscillation initiation. Even when using the latest trends in the development of teeth, when their shape is upgraded and developed to meet specifically given load range, the above mentioned irregularity of transferred torque cannot be completely eliminated. Therefore, it is necessary, already in the design phase, to eliminate the transmission paths by which are vibrations transmitting to other components. People perceive this action in the form of vibration, noise, or temperature change in the surroundings. With the increasing comfort levels and number of produced vehicles the reduction of vibration and noise of machinery parts becomes stricter, including gears. The experimental approach is primarily used to assess the accuracy of designed gearboxes, but it is a very expensive and a time consuming method. Therefore, it is necessary to develop a process that utilizes both numerical simulation and experimental approach but also combines the advantages of both, particularly time and cost savings and comparability of results. For this purpose, the experimental gearbox is designed and manufactured including the single-stage gear enabling variable configurations in terms of the ratio change. The gearbox is subjected to numerical simulation of different complexity levels, as well as technical experiment. Furthermore, the universal virtual prototype in Multi-Body System ADAMS is created, which reflects the impact of several key parameters for proper functionality, such as axial distance, backlash, gear mesh stiffness, shaft mounting stiffness (bearings) and modal properties of the shafts and gearbox housing. Last but not least, the impact of imbalance or irregularity of input shaft speed is incorporated. The last part focuses on a brief description of the application of the presented methodology – modelling of vibrations on the tractor gearbox.
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