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Mathematical analysis and numerical simulation of bone remodeling
Čížek, Pavel ; Hron, Jaroslav (referee) ; Maršík, František (advisor)
In the presented work, we study a model of bone deformation caused by action of external forces. After the biological introduction, in which we describe a bone remodelling process and its connection with bone deformation, we deal with conservation laws and material characteristics of a bone. We define weak formulation. Further, we linearize the equations and prove existence and uniqueness of the solution. Consecutively, we describe the finite element method and the programming of this method for the computing of the approximate solution of the problem using the logic of object-oriented programming. We also adduce a description of the used data structures. In the conclusion, we present numerical results reached by the described program that represent deformation of femur and deformation of vertebras and intervertebral foramina.
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Automatic topology recognition and network monitoring based on FreeBSD
MACEK, Petr
The goal of the Bachelor Thesis is the creation of system tool for topology recognition and following LAN monitoring. This tool will be built on OS FreeBSD and formed like bootable image suitable for running from the USB stick. Besides the lower layers protocols TCP/IP, the protocol SNMP will be used for topology recognition and network monitoring. The tool will monitor state, network transmissions and other values at active network components too. Communication with the user will be realized via www interface. The goal is to create the tool executable on any computer without installation, to perform quick topology recognition, its visualisation and basic monitoring. It is supposed to be the opposite of the tools of NMS type that need installation on server, database server and have other requirements.
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Purchase decision-making process of consumers in the market of portable computers
Pavlisová, Katarína ; Koudelka, Jan (advisor) ; Stříteský, Václav (referee)
The master's thesis deals with the purchase decision-making process of consumers in the market of the portable computers. The aim of this thesis is to analyze the different stages of the purchase decision-making process, specify the consumers in this market and describe their buying behaviour. In the theoretical part of the thesis there are described internal and external factors affecting the buying behaviour of consumers and also the purchase decision-making process. Furthermore, the thesis describes the market of portable computers, the current situation on this market and purchase decision-making process in this market. The thesis contains primary and secondary research. Primary research involves the analysis of data obtained from a questionnaire survey conducted in the form of online surveying. Primary research is devoted to the description of the various stages of the purchase decision-making process of the defined age categories. Secondary research specifies the consumers in the market of portable computers on the basis of data from the database MML-TGI.
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The Evaluation of the Heavy Convective Precipitation Forecast
Zacharov, Petr ; Řezáčová, Daniela (advisor) ; Brechler, Josef (referee) ; Pešice, Petr (referee)
The thesis deal with the evaluation of the quantitative convective precipitation forecast and its uncertainty. Five convective events that produced heavy local rainfall in the Czech Republic were studied. The nonhydrostatic local model LM COSMO was run with a horizontal resolution of 2.8 km and an ensemble of 13 forecasts was created by modifying the initial and boundary conditions. Forecasts were verified by gauge-adjusted radar-based rainfalls. Ensemble skill and ensemble spread were determined using the Fractions Skill Score (FSS). The spread represents the differences between the control forecast and the forecasts provided by each ensemble member, while the skill evaluates the difference between the precipitation forecast and radar-based rainfalls. The numerical experiments used the FSS-skill and spread values related to four events to estimate the skill-spread relationship. The relationship was applied to a fifth event to estimate the QPF ensemble skill given the ensemble FSS-spread. A couple of test of FSS computing were performed. The analysis of these events proved, that the application of the new fuzzy verification scores in high resolution QPF is highly advisable. The new scores are more suitable then the traditional verification scores based on the contingency table. In order to asses the...
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SOFSEM 2006: Současné trendy v teorii a praxi Computer Science
International conference SOFSEM 2006 is the 32-nd conference in the series of annual conferences devoted to the theory and practice of computer science. Current trends are reviewed especially in the field of theoretical fundamentals, wireless, mobile, ad hoc and sensory networks, and database and semantic web technologie. The proceedings of the conference edited by J. Wiedermann, G. Tel, J. Pokorny, M. Bielikova, and J. Stuller appear as Vol. 3831 in the series Lecture Notes in Computer Science, Springer 2006.
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Business plan for starting a company
Dufek, Petr ; Procházková, Veronika (referee) ; Khateb, Fabian (advisor)
This master's thesis deals with a processing of a business plan for establishing a company offering computer courses for beginners and intermediate users. The first part contains theoretical knowledge related to this thesis. The second part contains necessary analyses and the solution’s proposal. Created financial plan proves his viability.
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Fluid and structure interaction
Růžička, Martin
The subject of this thesis is the numerical simulation of the interaction of two-dimensional incompressible viscous flow and a vibrating airfoil. A solid airfoil with two degrees of freedom, which can rotate around the elastic axis and oscillate in the vertical direction, is considered. The numerical simulation consists of the finite element solution of the Navier-tokes equations coupled with the system of ordinary differential equations describing the airfoil otion. The time dependent computational domain and a moving grid are taken into account with the aid of he Arbitrary Lagrangian-Eulerian (ALE) formulation of the Navier-Stokes equations. High Reynolds umbers up to 106 require the application of a suitable stabilization of the finite element scretization. Numerical tests prove that used method is sufficiently accurate and robust.
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Detection of Global and Local Ischemic Changes in Electrical Field of the Heart
Šťovíček, Petr ; Kittnar, Otomar (advisor) ; Kneppo, Peter (referee) ; Horký, Karel (referee)
In this thesis, detailed investigation into the electrical field of the heart is presented in patients with various manifestations of myocardial ischemia. Methods of standard scalar electrocardiography and body surface potential mapping were used through statistical and mathematical analysis in order to compare their diagnostic performance. Body surface mapping proved to be more powerful research and diagnostic tool than standard electrocardiography and also constituted a framework for data entering the computer electrical model of the human heart and torso. Global and local ischemic changes were the primary objectives of the individual studies of this thesis. Different patient populations were studied including post myocardial infarction population, patients with variant angina and patients referred for percutaneous coronary angioplasty, and the population of patients suffering from ventricular arrhythmias related mostly to their postinfarction status. Traditional depolarization and repolarization changes were studied together with novel diagnostic parameters such as minimal potential loss within the QRS complex, single-beat cardiac micropotentials and distribution of the QT interval on the human thorax. Critical appraisal and error performance of so called QT interval dispersion was another important...
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Simple speech recognition algorithm for microcontroller
Vedra, Lukáš ; Šrámek, Petr (referee) ; Fedra, Zbyněk (advisor)
The bachelor thesis deals with speech recognition commands on the microcontroller Atmel AVR family. The thesis describes methods of recognition, influence of a sampling frequency selection, lengths of a sequence used, and a number of possible orders with respect to computing speed and memory capacity of the microcontroller. Furthermore, successful acquisition of orders is tested. It also discusses comparison options of an imprint saved in a dictionary command, or more precisely in a database of the microcontroller and a word which has just been uttered. The work also deals with a mechanical system design of the device.
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