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Design an intervention program for overweight women
Muchová, Eva ; Hráský, Pavel (advisor) ; Mahrová, Andrea (referee)
Title: Design an intervention program for overweight women. Objectives: Show an importance of lifestyle changes, a modification of diet habits and an inclusion of physical activities in overweight or obesity therapy. Find which aspects made positive influence to the state. Methods: For this study ten overweight women were chosen. Five of them were aged between 22 and 25 years old and other five were from 36 to 43 years old. None of them do some sport professionally now or in the past. Selected women wanted to change their lifestyle and this study should help them with it. I asked them about their earlier activities, their health and relationship to food. I measured them with a bioimpedance analyzer and a sartorial meter. I also measured their wight on personal scale. It was last parameter which I was interested in. The individual intervention program for 103 days was established based on all founded parameters. After these days I evaluated the influence of the intervention program on overweight changes. Results: The study demonstrate that physical activities, diet changes and lifestyle changes have a big influence on overweight or obesity fight. My first hypothesis was confirmed. It said that the personal weight and the body fat percentage decrease after 103 days with physical activities and change...
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Mnohoúrovňové modelování geomateriálů a iterační řešiče
Blaheta, Radim ; Byczanski, Petr ; Harasim, Petr
The knowledge of microstructure in combination with properties of the constituents and mathematical modelling can be used for investigation of the properties of geomaterials at application scale. We investigate problems with both deterministic knowledge of microstructure, derived from X-ray CT scans, and stochastic one. The stochastic generation is also used for a systematic study of robustness of iterative solvers, particularly for Schwarz methods for PDE problems discretized by mixed FEM.
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Computer simulations of conformational behavior of block copolymers in selective solvents
Šindelka, Karel ; Limpouchová, Zuzana (advisor) ; Kuldová, Jitka (referee)
The presented bachelor thesis deals with the study of the conformational be- haviour of diblock copolymers in the selective solvent. The polymer solution was modelled using a coarse-grained model and is simulated using dissipative particle dynamics (DPD). An original C-code for DPD simulations together with a new software package for processing of simulation data was developed. Functionality of the code and software were tested for two systems. The first system corre- sponded to a linear homopolymer in a solvent and the scaling laws for homopoly- mer in dilute solution were reproduced. The second system represented diblock copolymers in selective solvents and micellar behaviour simulated with the de- veloped code agreed with simulations by Sheng et al. Then, the self-assembly of long copolymer chains in selective solvents that mimics a block copolymer of poly(methacrylic acid) and poly(ethylene oxide) in aqueous solution at pH 1 was studied for different polymer concentrations. The simulation results provided valuable insight into the studied system and serve as a good starting point for DPD simulations of this system with added surfactants and at different values of pH, where the electrostatic interactions become important.
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Future of reliability assessment of steel structures
Marek, Pavel ; Guštar, M. ; Lokaj, A.
The rapid development of computer technology makes it possible to anticipate significant improvements in the reliability assessment of steel structures, During the last two decades through the development of the SBRA method, a significant adjustment of the assessment of structural safety, serviceability and durability is now feasible. The probabilistic approach introduces next representation of loads and all other variables affecting the reliability, while the interaction of all variables can be considered using the first as well as second order theory analysis.
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Modelování kapalinově scintilačních spekter metodou Monte Carlo
Šimek, Ondřej ; Šídlová, V. ; Světlík, Ivo ; Tomášková, Lenka
The paper is aimed on simulations of liquid scintillation (LS) pulse spectra of beta emitters without additional interfering effects. The explanation of the non-influenced shape of liquid scintillation pulse spectrum gives a better possibility to indicate additional interferences as: presence of other radionuclides, unstability of the scintillation mixture, various types of wall effects, color quenching, etc. We concentrated on the scale of energies above 100 keV, hence a great number of additional effects, with a small quantification possibility, can be expected in the parts below. Results of simulations of energy deposition from primary electrons, leakage of the electrons from counting vial, and fluctuation of the energy transferred by scintillation chain are described and briefly discussed.
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The impact of macroeconomic shocks on credit risk of Slovakian banking sector and its stress testing
Lörinčík, Martin ; Dědek, Oldřich (advisor) ; Kubíček, Martin (referee)
Credit risk tracking and quantification play important roles in risk management and they are not applied only by financial institutions on microeconomic level, but also by central banks on the background of aggregated data. This master thesis deals with the analyses of shocks of given significant macroeconomic variables and their reply on changes of households' and firms' defaulted, non performing loans in Slovakian banking sector. In introductory part, the method of data handling is described, because of their inconsistency in the given field of research. That is caused on one hand by the post-transformational consolidation process of Slovakian banking sector and on the other hand by legislative shifts and changes in calculation methodology of non performing loans. The main aim of the thesis is not to describe and interpret most precisely the economic relations that could influence the level of non performing loans, but the effort to widen the range of credit risk stress testing possibilities in Slovakian banking sector. In order to check the macroeconomic variables' significance, OLS regression is used. Important part of the stress tests is the application of Monte Carlo method which simulates high number of stress scenarios and macroeconomic variables' shocks and therefore helps to improve the...
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O limitní přesnosti segregovaných technik pro sedlobodové úlohy
Jiránek, P. ; Rozložník, Miroslav
In this contribution, we analyze the numerical behavior of the Schur complement reduction method and the null-space projection method – two representatives of segregated methods used to solve large- scale saddle point systems. They are both based on the transformation of the original problem to the reduced form which is solved iteratively (e.g. by the conjugate gradient method) giving approximations to one block component of the solution vector. The remaining unknowns are solved by the back-substitution to the original system. Depending on the actual implementation, we estimate the maximum attainable accuracy level of the computed approximate solution.
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Traffic Simulation
Šmíd, Jakub ; Knap, Tomáš (referee) ; Nečaský, Martin (advisor)
Title: Traffic simulation Author: Jakub Šmíd Department: Department of Software Engineering Supervisor: Mgr. Martin Nečaský, Ph. D. Supervisor's e-mail address: necasky@ksi.mff.cuni.c Abstract: The goal of this bachelor thesis is to create a program that simulates the traffic in user defined city. Application mainly watches the status of roads, monitors number of vehicles on them and when the road becomes full, program reports traffic jam and diverts part of the traffic in order to reduce the jam or even completely eliminate it. Besides personal traffic it minitors vehicles of city public transport planned by time table. After the end of simulation it suggest changes that can optimilize time of arrivals of scheduled traffic nearer to scheduled time of arrivals. Keywords: traffic, simulation, jam
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Circularly polarized SIW cavity-backed microstrip patch antenna
Procházka, Petr ; Láčík, Jaroslav (referee) ; Mikulášek, Tomáš (advisor)
This bachelor thesis deals with a circularly-polarized substrate-integrated-waveguide cavity-backed microstrip patch antenna. The first part dedicates basic theoretical knowledge of microstrip patch antennas such as patch shape, the possibility of its excitation etc. The following part describes the possibilities and adjustments of generating circularly-polarized wave from a microstrip patch antenna for generating circularly-polarized waves and general knowledge about the advantages and application of circularly-polarized wave. The next part deals with a step-by-step design of a proposed antenna. The last part present a comparison of simulated and measured results.
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Computational aeroacoustics of human phonation
Šidlof, Petr ; Zoerner, S.
The current paper presents a CFD model of flow past vibrating vocal folds coupled to an acoustic solver, which calculates the sound sources from the flow field in a hybrid approach. The CFD model is based on the numerical solution of 3D Navier-Stokes equations on a time-dependent domain, solved by cell-centered finite volume method. To capture the fine turbulent scales important for the acoustic source calculations, the equations are discretized and solved on large computational meshes up to 3.2M elements. The CFD simulations were run in parallel using domain decomposition method and OpenMPI implementation of the MPI standard. Aeroacoustic simulations are calculated in a separate step by Lighthill’s acoustic analogy, which determines the acoustic sources based on the fluid field. This is done with the research code CFS++ which employs the finite element method (FEM).
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