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Analysis of economic data using statistical methods
Foltýnová, Andrea ; Doubravský, Karel (referee) ; Michalíková, Eva (advisor)
This bachelor thesis focuses on the financial and statistical analysis of the company called AREMA, s.r.o. At the beginning of the work, fundamental theories used for financial and statistical analysis are described. These theories are then applied in the analytical part of the thesis for the calculation of selected financial indicators and in the statistical part for the prediction of development in the upcoming two years. The last part is dedicated to the evaluation of the company's financial health, as well as the author's proposals for its improvement.
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Detection of Harmfulness of Communication Partners and Their Networks
Kučera, Rostislav ; Homoliak, Ivan (referee) ; Očenášek, Pavel (advisor)
With the growing dependence of the population on electronic devices, the risk of data loss or misuse also increases. As the number of attacks in computer networks rises, systems for detecting malicious traffic become more important. The goal of this work is a theoretical analysis and implementation of modules for detecting malicious computer communication using machine learning methods, specifically a neural network model, and statistical analysis, which are deployed within the extended intrusion detection system Snort.
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Polynomial Chaos Expansion for assessment of tunnel linings
Křížek, Michael ; Novák, Drahomír (referee) ; Novák, Lukáš (advisor)
The study presents the application of polynomial chaos expansion (PCE) methodology for the uncertainty quantification and sensitivity analysis within the realm of predictive modeling. Its principal objective is to optimize the PCE methodology for a specific dataset and subsequently assess the resultant outcomes. These outcomes will be compared with those obtained through the Monte Carlo method to ascertain the comparative precision of the PCE methodology. To execute the requisite computations essential for data analysis, modules sourced from the UQpy project were employed. The dataset comprised 86 discrete points constituting a 2D cross-section of a tunnel. Each point encapsulated 1000 input measurements, wherein each measurement involved five uncertain variables. Static moments and Sobol indices were computed for each data point. In terms of result validation, the PCE error will be ascertained via cross-validation and analytical validation error computation, and both methodologies will be juxtaposed for comparison. Result validation will be delineated through alignment with reference data, alongside cross-validation and robustness analysis.
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Analysis of osteolytic spinal tumors in patients with multiple myeloma using CT data
Čurillová, Miriam ; Mézl, Martin (referee) ; Nohel, Michal (advisor)
Táto bakalárska práca sa zameriava na analýzu osteolytických lézií u pacientov s mnohopočetným myelómom. Prvým krokom k dosiahnutiu nášho cieľa bolo štúdium tohto ochorenia, jeho diagnostických kritérií, možných komplikácií a dostupnej liečby. Praktická časť pozostávala z niekoľkých samostatných úloh. Štatistická analýza bola vykonaná na súbore údajov pozostávajúcom z CT skenov pacientov s diagnostikovaným mnohopočetným myelómom, ako aj osôb bez akejkoľvek patológie chrbtice. Po extrakcii a redukcii počtu príznakov sme dokončili analýzu získaných dát. Dospeli sme k záveru, že existujú príznaky, ktoré sa medzi týmito dvoma skupinami výrazne líšia. Po analýze celých tiel stavcov bola vykonaná analýza lézií na kontrolných snímkach, kde bol analyzovaný ich objem.
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Major industrial accidents in the Czech Republic - accident analysis of explosives
Robek, Tomáš ; Trávníček, Petr (referee) ; Kotek, Luboš (advisor)
This thesis focuses on industrial accidents involving explosives in the Czech Republic. The theoretical part of the thesis is devoted to the definition of the concept of explosives according to the current legislation, classification and description of the properties of individual types of explosives. Furthermore, the theoretical part deals with the effects of explosives in accidents on their surroundings and approaches to the prevention of these accidents. In the practical part of the thesis, individual accidents were analysed and the data obtained were subsequently subjected to statistical analysis. On the basis of the statistical analysis, recommendations for the future development of safety in industrial facilities that are used for the production, processing, storage or disposal of explosives were proposed.
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Assessing Economic Situation of a Company and Proposals for Its Improvement
Sachambula, Nelson Mendonca ; Měrtlová,, Libuše (referee) ; Doubravský, Karel (advisor)
This diploma thesis focuses on the assessment of the economic situation of XYZ Med s.r.o. for the period from 2013 to 2022. The economic situation of the company is evaluated on the basis of selected financial indicators, which are then subjected to statistical analysis in order to create a basis for the proposal of measures to improve the situation. The theoretical part describes the financial ratios, correlation analysis, regression analysis and time series. In the analytical part of the thesis, the calculation of financial ratios is performed and then a statistical analysis is carried out on the basis of which the future development of the company is predicted. The analysis also tests the dependence for selected ratios. The practical part contains suggestions for improving the economic situation of the company.
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Electrophoretic and immunofluorescence methods for study of plant cell cultures
Klimešová, Marie ; Babula, Petr (referee) ; Provazník, Ivo (advisor)
In all organisms are rising a reactive oxygen and nitrogen species by the effects of various stress factors and these species have a negative impact on the organism. Due to this species plants have built up an efficient antioxidant system, that helps them to resist negative effects of reactive oxygen and nitrogen species. In this work was researched the effect of hydrogen peroxide and sodium benzoate on the production of hydrogen peroxide, superoxide, reactive nitrogen species and malondialdehyde, contained in the root and above-ground part of maize (Zea mays L.). By use of the fluorescence microscopy there were obtained images of cross-cut of root from which was determined the intensity of fluorescence of individual parts of the root and was examined the effect of the intensity of fluorescence markers of oxidative stress in dependence on the type of the fluorescence filter used.
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Statistical Analysis of Air Pollution by Selected Pollutants
Pernicová, Veronika ; Durnová, Markéta (referee) ; Balgová, Zuzana (advisor)
This thesis analyses an occurrence of detected pollutant concentrations of nitrogen oxides, dust particles of the size od 10 and 2,5 m and ground ozone in years 2015-2019 in seven chosen locations in Brno agglomeration. In the introduction, the thesis describes basic terms, the issues of air pollution and relevant legislation. Individual pollutants are defined and also their effect on environment and human health. After that, the locations of Brno, for which the analysis is made, is specified. The dynamics of development of individual pollutants is shown through a statistical analysis of individual time lines. The analysis also focuses on the difference in the level of pollution during weekdays, holidays, seasons or rush hour. The quantities are also viewed from the point of view of the relevant air pollution limits and the influence of climatic factors, which significantly affect their concentrations.
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Electricity Consumption Progression Analysis
Kunc, Dominik ; Procházka, Jiří (referee) ; Bartošík, Tomáš (advisor)
The aim of this thesis is to briefly introduce the reader to the problem of development of the electricity consumption, to show the possibilities of its prediction, and provide an example of electricity consumption analysis, which may serve as a basis for long-term forecast. The first part of this work is devoted to brief overview of the development of consumption of electrical energy in the Czech Republic and factors associated with that development. The main events of Czech electrification history are outlined, as well as factors influencing the magnitude of the demand for electricity in the recent times. There are described the possibilities of the influence of foreign exchange and price of the electricity, net losses, GDP, the consumption of gas, the number of inhabitants, or the structure of the economy. This work further describes the development of the consumption of electric energy abroad and comparison of the electricity consumption in the Czech Republic to its neighboring countries, in which there are apparently influence by variety of factors that affect the consumption development trend. For more complex overview, the electricity consumption of most of European states is being noted, and near the end of the chapter the development in poorest countries and in quickly growing economies is shown. The fourth chapter mentions methods for short and middle-term prediction of consumption of electricity. There also is more consistent description of possibilities useful for long-term prediction, for which the use of the results of statistics analysis is possible. The description of observed data that are used to find the dependences of different factors is made in the following part. Further the approach of the statistics analysis used in this thesis is shown, and the key terms are explained. The dates concerning the consumption of Czech Republic are analyzed, followed by the states with similar trend of the consumption and finally other European states. Sixth chapter examines the possible uses of the outcomes of statistical analyses for long-term prediction of electricity consumption. The conclusion sums up the knowledge acquired during the research concerning problem of electricity consumption and my own analysis of data.
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Evaluation of porosity in Al-alloy die-castings
Klocová, Petra ; Nová, Iva (referee) ; Čech, Jaroslav (advisor)
The objective of this diploma thesis is an evaluation of die-castings porosity, eventually the evaluation of seats with local squeeze in connection with their mechanical and structural properties. The swatches of alloy AISi9Cu3 were taken from the engine block made by Škoda Auto Company, Mladá Boleslav. To the evaluation and the comparison of the results there were the other VUT FSI Brno students´ theses used.
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