Kvalifikační práce
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Zobrazují se záznamy 1741-1800 z 11424
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Multilevel methods
Výsledek obhajoby: UZNÁNO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 28. 6. 2022The analysis of the convergence behavior of the multilevel methods is in the literature typically carried out under the assumption that the problem on the coarsest level is solved exactly. The aim of this thesis is to ... -
Registration and determination of deformed point cloud errors
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 15. 6. 2022In this work, we focus on the use of laser slit scanning rigs for 3D reconstruction of the inner parts of a nuclear reactor. Special emphasis is placed on the influence of radial distortion on the quality of 3D reconstruction. ... -
Významné věty afinní geometrie
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 16. 6. 2022V této práci se seznámíme s pojmy a nástroji afinní geometrie. To jsou zejména barycentrické souřadnice, afinní zobrazení a dělicí poměr. Ty pak použijeme k dokázání afinních vět. K Menelaově větě uvidíme vícero důkazů. ... -
Superradiance na urychlených systémech
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 15. 6. 2022In this work we will study the electromagnetic superradiance phenomenon on acceler- ated systems. We will briefly cover superradiance on a cylinder, which was thermodynam- ically proven by Zel'dovich. Then we will attempt ... -
Comparing two main community detection algorithms and their applications on human brains
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 23. 6. 2022Complex networks help us to understand complicated phenomena, including human brain. One of its key characteristics is its modular organization, also know as community structure. This thesis compares two main community ... -
Content-Based Image Retrieval: from Primitive to Advanced Techniques
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 9. 6. 2022The Wienbibliothek im Rathaus, Vienna City Library, collected over 300 thousand posters scanned in high quality from the last 100 years. Browsing and searching in such a large dataset is beyond human power. Therefore, a ... -
Substrátem kontrolované fyzikální vlastnosti tenkých vrstev magnetických oxidů pro spintronické aplikace
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 16. 6. 2022As conventional electronics approaches its fundamental limits, new paradigms are re- quired. Integration of new spintronic materials with current silicon technology shows great promise. This thesis demonstrates the possibility ... -
Magneto-optická magnetometrie tenkých feromagnetických vrstev s flexibilním substrátem
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 15. 6. 2022This work is focused on measurements of magnetooptical effects in thin magnetic multilayers prepared on a flexible substrate. A main goal of this thesis was to deter- mine ideal conditions of the experiment, suitable for ... -
Möbiova funkce kombinatorických uspořádání
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 23. 6. 2022In this thesis we study the poset of signed permutations under the pattern containment order. A signed permutation is a permutation in which each entry has a plus or a minus sign assigned to it. Therefore signed permutations ... -
Motion of a large cylinder in superfluid helium
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 15. 6. 2022The behaviour of flows in superfluid helium is still partly unknown. This work aims to contribute to this active field of research by studying the macroscopical vortices shed from the trailing edge of cylinder with ellipsoidal ... -
Raman Microspectroscopy Data Processing
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 17. 6. 2022Raman microspectroscopy is a powerful tool combining laser scanning confocal microscopy and Raman spectroscopy which is an analytical tech- nique that provides chemical species-specific vibrational spectra or so-called ... -
Moufangové rovina a spinové grupy
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 16. 6. 2022In this thesis we consider the action of the exceptional simple Lie group F4 on the so called (real) Moufang plane OP2 R. The goal of this thesis is to present a proof of the transitivity of this action, which is as complete ... -
Stejnoměrný zákon velkých čísel, VC dimenze a strojové učení
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 21. 6. 2022In this thesis we study the generalized Glivenko-Cantelli theorem and its application in mathematical foundations of machine learning. Firstly, we prove the generalized Glivenko-Cantelli's theorem using covering numbers ... -
Testy nezávislosti pro posloupnost veličin s Poissonovým rozdělením
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 21. 6. 2022This thesis deals with tests of independence for time series of identically distributed Poisson random variables. In the introductory part, important terms and definitions are defined, in particular the autocorrelation ... -
Quantifying Mortality and Longevity Risk by Means of Stochastic Models
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 8. 6. 2022In this thesis we investigate the structure of the generalized age-period-cohort mortality model and we comment on the key components of its structure. As an example of the generalized age- period-cohort model we take a ... -
Vnitřní struktura kvaziperiodických emisí pozorovaných v zemské magnetosféře
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 15. 6. 2022Title: Fine structure of quasiperiodic emissions observed in the Earth's magne- tosphere Author: Vojtěch Partík Supervisor: doc. RNDr. František Němec, Ph.D. Abstract: Quasiperiodic emissions are a type of electromagnetic ... -
Klasický a kvantový model popisující 1D dynamiku volného elektronu v ponderomotorickém potenciálu optické záznějové vlny
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 15. 6. 2022Inelastic scattering of freely propagating electrons on light waves is currently a studied topic because of potential applications in advanced electron microscopy and diffraction. The interaction is typically described ... -
Study of the electrical properties of the production silicon strip sensors and test structures for the ATLAS ITk Project
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 9. 6. 2022The properties of silicon detectors can be studied by evaluating electrical tests performed on them. The detection performance of silicon detectors is affected by damages caused by ionizing radiation, neutrons and gamma ... -
Kopule pro nespojitá rozdělení
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 23. 6. 2022Copulas are a popular choice when assessing the dependence structure between continuous random variables. However, major difficulties arise as soon as one of the random variables is non-continuous. This thesis introduces ... -
Useknuté náhodné vektory
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 21. 6. 2022This bachelor thesis deals with truncated random vectors, distributions and properties of theirs. Truncated random vectors theory is then used to solve problem of delayed reporting of non-life insurance claims. At the of ... -
Umělá inteligence pro deskovou hru Patchwork
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 17. 6. 2022Bachelor thesis on the topic of artificial intelligence in the game Patchwork. It deals with the actual implementation of the game and the computer-controlled player, as well as approach that was taken to get a com- petent ... -
Measurements of quantum turbulence in spherically symmetric counterflow
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 9. 6. 2022This work concerns with quantum turbulence in superfluid helium generated via spher- ically symmetric thermal counterflow. To this end, we designed a spherical brass cell with a point-like heater in the middle. The turbulence ... -
Funkční šifrování pro kvadratické funkce
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 16. 6. 2022In this thesis we will be studying functional encryption for quadratic functions. We want to encrypt a message, in form of a vector, z to a plaintext ct and create a secret key skf for a quadratic function f, which will ... -
Slapové zahřívání Neptunova měsíce Tritonu
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 15. 6. 2022We study the largest Neptune's moon Triton and the anelastic deformation associated with the obliquity tides by employing spectral methods. For this purpose, we developed our Python 3 program and computed tidal heating for ... -
Non-smooth paths
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 8. 6. 2022Sewing Lemmas are useful tools when one needs to give meaning to some abstract integral through given local approximations. This can be used in Rough Paths Theory, for example. Many versions of such lemmas are known. ... -
Gebeleinova nerovnost
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 21. 6. 2022In this thesis we deal with a correlation inequality for Gaussian random variables called Gebelein's inequality. In the first part of the thesis, we state the inequality, define Hermite polynomials, and derive several of ... -
Validace výstupů z atmosférických modelů WRF-Chem a CAMx se zaměřením na troposférický ozón
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 15. 6. 2022The atmospheric model accuracy is substantially influenced by quality of boundary conditions used by physical and chemical part of the model. The thesis evaluates the development of the model output accuracy in case of ... -
Augmented-reality Multiplayer Game
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 17. 6. 2022With the advent of COVID-19, there have sprung up phone applications that track the contacts of its users. A bad accuracy of location-based proximity at close range, especially indoors, drove developers to look for other ... -
Consistent non-equilibrium thermodynamic modeling of hydrogen fuel cells
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 15. 6. 2022At first, a classical irreversible thermodynamic model of the hydrogen pump is derived in this thesis. The model is then numerically implemented by using the Finite volume method in the VoronoiFVM library in Julia. The ... -
Matematické duely a truely
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 23. 6. 2022The bachelor thesis describes and analyzes a game in which two or three players compete against each other with the task of eliminating opponents. The game has several variants, which differ in the specified rules. The aim ... -
Řídká řešení v optimalizačních úlohách klasifikace
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 21. 6. 2022The main goal of this work is to give self-contained description of proximal and ordi- nary stochastic subgradient descent methods, which are used in finding sparse solutions of labeling optimization problems. We will ... -
Data Preprocessing Strategies in Imbalanced Data Classification
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 17. 6. 2022Learning from imbalanced data has been a research topic studied for many years. There are two main approaches used today - data-level and algorithm- level methods. We set out to study resampling methods which belong to the ... -
Umělá inteligence pro karetní hru Mandala
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 17. 6. 2022The bachelor paper deals with development of artificial inteligence for the two player card game Mandala. It describes several approaches to creating artificial inteligence and results if the testing if their implementations. ... -
Vybrané přístupy k sezónnímu očišťování ekonomických časových řad
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 23. 6. 2022This thesis deals with the issue of seasonal adjustment of economic time series and their subsequent predictions. In the theoretical part we define the time series and its properties and describe the individual methods we ... -
Rovnice vedení tepla s dynamickými okrajovými podmínkami
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 15. 6. 2022In this thesis we deal with the solution of the heat equation with a dynamic boundary condition, which relates the time derivative at the boundary and the normal flow at the boundary. We first deal with the derivation of ... -
Vliv typu parametrizace a nastavení volitelných parametrů na výsledné tření od orografických gravitačních vln v klimatických modelech.
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 16. 6. 2022Orographic gravity waves (OGWs) are ubiquitous in the atmosphere and they have an important influence on the dynamics and energy transport especially in the middle- atmosphere. As such, they have to be included in global ... -
Modely rozložených časových zpoždění
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 23. 6. 2022The aim of this bachelor thesis is to unite the theory about distribu- ted lag models and autoregressive distributed lag model, which includes lagged dependent variables and application of these models on real data. The ... -
Point processes of objects with random lifetime
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 10. 6. 2022The thesis deals with point processes of objects with random lifetime. The form of the likelihood function of an observed spatial-temporal pattern with random lifetimes is derived, where the formula is subsequently generalised ... -
Studium spinové dynamiky v magnetických kovech pomocí terahertzové a optické spektroskopie
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 16. 6. 2022Understanding of the ultrafast spin dynamics is essential for application and further development of new spintronic devices. The ultrafast spintronics is a promising path towards faster and less energetically demanding ... -
Využití bleskových dat pro nowcasting.
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 15. 6. 2022Advances in lightning detection systems and convective storm analysis techniques are im- proving our understanding of their correlation. This has been the focus of many studies in re- cent decades, and it has been shown ... -
Modelování rozdílů v úmrtnosti podle pohlaví
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 8. 6. 2022This diploma thesis deals with sex-specific mortality modelling, that is modelling in two populations - female and male, with emphasis on models considering the inter- dependence between these populations. Four models were ... -
Propp-Wilsonův algoritmus
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 21. 6. 2022This thesis deals with the theory leading up to the Propp-Wilson Algorithm and the application of this algorithm on the Ising model. The goal is to sum- marize the relevant theory from the book H¨aggstr¨om (2002) and solve ... -
Matematické paradoxy
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 17. 6. 2022In the presented bachelor thesis we will focus on mathematical paradoxes, especially the Banach-Tarski paradox. We will show several paradoxes concerning decompositions of sets, such as the Sierpiński-Mazurkiewicz paradox. ... -
Non-Autoregressive Neural Machine Translation
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 9. 2. 2022In recent years, a number of mehtods for improving the decoding speed of neural machine translation systems have emerged. One of the approaches that pro- poses fundamental changes to the model architecture are non-autoregressive ... -
Generace femtosekundového superkontinua pomocí ultrakrátkých laserových pulzů se stabilní fází vůči obálce
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 15. 6. 2022Femtosecond supercontinuum is a nearly ideal source of light for optical spectroscopy due to its extremely broad spectrum and a combination of high temporal and spatial coherence. This thesis is focused on experimental ... -
Diferenčné a diferenciálne rovnice v životnom poistení
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 8. 6. 2022The diploma thesis deals with the calculation of life insurance reserves, higher mo- ments and the distribution function of future payments of reserves using difference and differential equations. In the beginning, the ... -
Confronting heavy-ion models with experimental data from LHC
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 15. 6. 2022The purpose of heavy-ion physics is to study the properties of strong interaction and matter under the extreme conditions that prevailed within a few millionths of a second after the Big Bang. These extreme conditions can ... -
EasyTrain - tréninková aplikace pro Android
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 17. 6. 2022Nowadays mobile applications are a big part of personal workout acces- sories. There is a big gap on the market in terms of applications for personal coaches and custom made trainings in general. Goal of this thesis is to ... -
Modelování kvantové dynamiky v anharmonických potenciálech pomocí modelu interagujících harmonických oscilátorů.
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 15. 6. 2022Thematically, the work pursues a means of numerical description of anhar- monic molecular vibrations regarding vibronic coupling. The main concern is with the possibility of replacing motion in adiabatic anharmonic potential ... -
Kvantový chaos v konečných mnohočásticových systémech
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 16. 6. 2022In this work, we show, that relative oscillations in asymptotic times of microcanonical Out-of-Time-Order correlators (OTOCs) are suppressed by chaos with the size of the sys- tem. Therefore they can serve as an indicator ... -
Semiparametric Analysis of Nested Case-Control Design
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 8. 6. 2022Studying rare diseases often deals with small percentage of cases requiring a large amount of subjects in the medical study. The common analysis by the Cox proportional hazards model may be very time-consuming and financially ... -
Optické hradlování epitaxního grafénu
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 16. 6. 2022Silicon carbide (SiC) is a wide band gap semiconductor with high thermal, chemical and mechanical resistance. By thermal decomposition of silicon from SiC, it is possible to grow high quality epitaxial graphene on the ... -
Operační riziko a značkovaný Poissonův proces
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 23. 6. 2022The subject of this bachelor thesis entitled "Operational risk and marked Poisson process" is the modelling of operational risk using marked Poisson process. The Poisson process is a type of a point process that models ... -
Časová kalibrace kalorimetru ATLAS Tilecal
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 15. 6. 2022Following the end of the maintenance period for the ATLAS detector in LHC, CERN, a series of calibrations have to be performed to ensure the quality of measured data. This thesis details the work done on time calibrations ... -
Iterativní zdokonalování přepisu zvukových nahrávek s využitím zpětné vazby posluchačů
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2021)Datum obhajoby: 22. 9. 2021Iterative Improving of Transcribed Speech Recordings Exploiting Listeners' Feedback Abstract This Ph.D. thesis deals with making a corpus of audio recordings of a single speaker accessible to wide public and interested ... -
PlanetSide 2 API Library with Outfit Activity Tracking Discord Bot
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 17. 6. 2022The goal of this thesis was to create a .NET library working with a public API of a Census service allowing developers to access data from products of a Daybreak Game Company and utilizing this library to create a bot for ... -
Variational Neural Network Quantum States for Frustrated Magnetic Systems
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 16. 6. 2022We investigate the Shastry-Sutherland model (SSM), i.e., spin-1/2 quantum Heisen- berg model on a Shastry-Sutherland lattice, using a newly emerging approach exploiting well-developed machine learning techniques. We utilize ... -
Physical properties of doped and non-doped Tb3Fe5O12 studied by optical spectroscopies
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 16. 6. 2022This thesis focuses on systematic study of optical and magneto-optical properties of non-doped and doped Tb3Fe5O12 thin films, on gadolinium gallium garnet and silicon substrates. Spectroscopic ellipsometry measurements ... -
Module approximations and direct limits
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 14. 6. 2022This master's thesis deals with questions about the existence of module appro- ximations, namely C-precovers and C-covers for a given class C of R-modules, and studies the relations of these approximations with direct ... -
Stochastické modely úmrtnosti v kontextu kvantifikace vybraných pojistněmatematických rizik
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 8. 6. 2022The thesis focuses on the stochastic mortality models in the context of actuarial risks. In the theoretical part, the thesis defines five mortality models with approaches to prediction. After that, it follows the description ...