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Zobrazují se záznamy 921-960 z 11242
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Free boundary problems
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 8. 9. 2023This thesis deals with the one-phase Bernoulli problem, focusing on the existence and regularity of its solutions. After establishing the necessary preliminary theory on function spaces and convergence in the first chapter, ... -
Algoritmy pro Minkowského součet mnohoúhelníků
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 12. 9. 2023This bachelor's thesis deals with the Minkowski sum of two non-convex polygons in the plane. Specifically, it focuses on describing and comparing two methods for computing the Minkowski sum: the decomposition method and ... -
XL-zaistenie pre viacero línií
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 8. 9. 2023This paper focuses on simulation modeling of the total aggregate reinsurer claim S when considering XL.reinsurance for multiple insurance lines. In the first part, this re- insurance structure is defined. In the second ... -
Permutační grupy a míchání karet
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 4. 9. 2023In this thesis we solve an old problem, named after the magician and mathematician Alex Elmsley, of raising a card to the top of the deck using faro shuffles. Furthermore we examine the group structure generated by these ... -
Modeling atomic nuclei using supercomputers for precision tests of the Standard model
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 5. 9. 2023One of the most important problems of modern theoretical nuclear physics is to accu- rately determine the structure of atomic nuclei. To obtain results that are in agreement with experimental data, one needs to solve the ... -
Modely pre finančné časové rady a ich softvérová implementácia
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 5. 9. 2023This thesis deals with financial time series models and their implementation in soft- ware products. The theoretical part of the thesis includes a description of the volatility models ARCH, GARCH, IGARCH, ARCH-M, GARCH-M, ... -
Testy nezávislosti pro funkcionální data
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 5. 9. 2023This thesis deals with tests of serial independence for functional time series. The first part of the thesis introduces the issue of serial independence in time series of random vari- ables. The second part focuses on tests ... -
Statistical inference in varying coefficient models
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 5. 9. 2023In this master thesis we study varying coefficient models, which is a class of models that allow the coefficients to be smooth functions of some effect-modifying variable. We introduce the models in a broader context and ... -
Teplotně indukovaná rekonstrukce bimetalického katalyzátoru na bázi Pt-Cu pro palivové články
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 5. 9. 2023Fuel cells appear as a promising technology, enabling the replacement of internal combustion engines in the automotive industry. Hydrogen fuel cells with a polymer membrane are particularly suitable for this application. ... -
Magnetic fields of current loops around black holes
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 1. 9. 2023We summarize and explain the mathematical procedure that allows us to find the closed form of the magnetic field generated by a test current loop in Kerr spacetime. We consider axisymmetric placement of the loop for all ... -
Velká dimenze vysvětlujících proměnných v regresních problémech
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 5. 9. 2023This thesis deals with asymptotic properties of least squares estimators of regression coefficients of linear models with a large dimension of regressors. Particularly, consistency and asymptotic normality are investigated. ... -
Lineární terahertzová odezva polovodičových nanostruktur
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 5. 9. 2023In this work we study an interaction between electrons in Dirac points and terahertz electromagnetic radiation. First, we find eigenstates of the effective hamiltonian in Dirac points. Then we introduce the interaction ... -
James-Steinův odhad
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 7. 9. 2023In this thesis, we will introduce the James-Stein estimator, we will study its properties and compare them with other estimation methods. We will explain, what is admissibility of an estimator and figure out if our estimators ... -
Structural aspects of graph coloring
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 9. 5. 2023In this thesis, we study the structural and algorithmic properties of graphs embedded or represented in surfaces and with constraints on their faces or cycles. We derive tools to quantify properties of embedded flows and ... -
Simulace zemětřesení Tottori (Mw 6.1) z r. 2016 pomocí dynamického modelu zdroje
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 5. 9. 2023We perform a parametric study for simple elliptical dynamic models of rupture propa- gation. We simulate the earthquake from the central part of Japanese prefecture Tottori in 2016 using a code for a simulation of the ... -
Study of the solar wind multicomponent structure and its variations in interaction regions
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 30. 9. 2022The solar wind is a multicomponent plasma consisting of protons, electrons, and smaller amounts of heavy ions. Often, two proton populations moving different speeds occur simultaneously. The more abundant one is called the ... -
Ultra-weak photon emission from biological samples
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 4. 9. 2023Oxidative processes are an inseparable part of the life of almost all living organisms. They help to maintain homeostasis but they can also stand behind various dysfunctions or diseases. Therefore, an effective method for ... -
Experimental study of the dissociative recombination of molecular ions at temperatures relevant to cold interstellar plasma (30 - 300 K)
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 11. 9. 2023TITLE: Experimental Study of the Dissociative Recombination of Molecular Ions at Temperatures Relevant to Cold Interstellar Plasma (30 - 300 K) AUTHOR: Mgr. Dmytro Shapko DEPARTMENT: Department of Surface and Plasma Science ... -
Optical and magneto-optical properties of topological and Dirac materials
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 13. 9. 2023Kristupas Kazimieras Tikuišis, Department of Optoelectronics and Magneto- optics, Institute of Physics of Charles University Doctoral thesis: Optical and magneto-optical properties of topological and Dirac materials ... -
The Gabriel-Roiter measure in representation theory
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 6. 9. 2023The Gabriel-Roiter measure is a module-theoretic invariant, defined in 1972 by P. Gabriel. It is an order-preserving function that refines a composition length of a module by also taking lengths of indecomposable submodules ... -
Representation theory of gentle algebras
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 6. 9. 2023The object of study of this thesis is a special class of quiver algebras called gentle algebras. To study modules over them, we can use a combinatorial or geometric view. Thanks to Theorem 6.1. in the article Chan and ... -
Metoda sdružených gradientů s deflací
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 29. 6. 2023Metoda sdružených gradientů je jednou ze základních iteračních metod pro řešení soustav lineárních algebraických rovnic se symetrickou pozitivně definitní maticí. V práci uvádíme dvě různá odvození této metody a ukazujeme ... -
Kozaiov-Lidovov mechanizmus v post-newtonovskej aproximácii všeobecnej relativity
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 21. 6. 2023Pri obehu častice okolo dominantného telesa, v dvojčasticovom systéme, je dráha obie- hajúcej častice pri jednom obehu približne keplerovská elipsa. Ak je tento systém poru- šený tretím telesom, orbitálne elementy dráhy ... -
Vibrační optická aktivita nukleotidů a kratších segmentů nukleových kyselin
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2021)Datum obhajoby: 15. 9. 20211 Nucleotides are organic molecules that have a wide range of functions in living organisms. They participate in cell signaling, serve as cofactors of enzymatic reactions, play a central role in cellular metabolism, and ... -
Koncentrační nerovnosti pro součty
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 26. 6. 2023In this bachelor thesis we focus on concentration inequalities for sums of indepen- dent random variables, which are bounded and not necessarily identically distributed. The main pillar of the thesis is Hoeffding's inequality, ... -
Relevantní deformace v teorii pole otevřených strun
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 21. 6. 2023String field theory takes string perturbation theory off-shell and since the different vacua of string theory are described by conformal field theories, it is tempting to use string field theory to describe conformal ... -
Portfolio performance evaluation
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 29. 6. 2023The goal of this work is to develop a tool for tracking and analysis of investment portfolios, with support for automatic financial data retrieval and highly customizable chart creation. In this thesis, we research existing ... -
Extraction and representation of unified metadata from files and file systems based on data formats
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 6. 6. 2023This thesis documents the process of analyzing, designing, and implementing a soft- ware tool able to accept files in various formats, inspect them in depth, and produce a graph in the Resource Description Framework that ... -
Teoretické a empirické kvantily a ich využitie pri konštrukcií predikčných intervalov
Výsledek obhajoby: NEOBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 21. 6. 2023The purpose of the bachelor thesis is to introduce the reader to two approaches to the construction of prediction intervals. The first procedure assumes a probabilistic model and leads to a frequentist prediction interval ... -
Procedural Generator of Short Detective-like Stories
Výsledek obhajoby: NEOBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2022)Datum obhajoby: 13. 9. 2022Procedural generation of interactive stories is still an understudied area, most of the work on which is purely academic, while the application of these technologies in a practical, for a wide audience, area promises good ... -
Kontrola magnetické anizotropie v multivrstvách Pt/Co/Pt
Výsledek obhajoby: UZNÁNO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 10. 7. 2023This thesis aims to explore the effect of in situ ion gun etching on magnetic proper- ties, such as perpendicular magnetic anisotropy, of Pt/Co/Pt multilayers. Perpendicular magnetic anisotropy is of interest due to its ... -
Using reinforcement learning to learn how to play text-based games
Výsledek obhajoby: UZNÁNO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 29. 5. 2023The ability to learn optimal control policies in systems where action space is defined by sentences in natural language would allow many interesting real-world applications such as automatic optimisation of dialogue systems. ... -
Playing a 3D Tunnel Game Using Reinforcement Learning
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 29. 6. 2023Tunnel games are a type of 3D video game in which the player moves through a tunnel and tries to avoid obstacles by rotating around the axis of the tunnel. These games often involve fast-paced gameplay and require quick ... -
Structure of a boundary layer between a star and an accretion disk: analytical models
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 21. 6. 2023In this work, we attempt to find a three-dimensional solution to the Navier-Stokes equations describing an α-disk accreting onto a neutron star. The solution for great radial distances is well-known. However, this solution ... -
Stolní hra Agricola a umělá inteligence
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 29. 6. 2023Bachelor thesis on artificial intelligence for Agricola deals with the actual implementation of the game, the computer controlled player, and the creation of a strategy for the human player. The developed program allows, ... -
Odhady parametrů pro frakcionální Brownův pohyb
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 26. 6. 2023This bachelor's thesis deals with a mathematical object called fractional Brownian motion, which has substantial applications in a wide variety of disciplines including, next to theoretical and financial mathematics, the ... -
Webový plugin pro vizualizaci sady sekundárních struktur RNA
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 29. 6. 2023The study of RNA is important to better understand evolution or some diseases. In this thesis, we present a library written in Typescript that offers methods for visual analysis of multiple RNA secondary structures, but ... -
Reduction-based Solvers for Multi-agent Pathfinding: Comparing Different Models
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 29. 6. 2023- Samyuktha Ramesh Thesis Title: Reduction-based Solvers for Multi-agent Pathfinding: Comparing Different Models Multi-agent path finding (MAPF) is the problem of navigating a set of agents from their starting position to ... -
Virtuální realita pro označování dat ke strojovému učení
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 29. 6. 2023 -
Hadron production in deep inelastic scattering of muons off protons at COMPASS experiment
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 21. 6. 2023The main goal of this thesis is to investigate azimuthal asymmetries in semi-inclusive deep inelastic scattering (SIDIS) of polarized muons on unpolarized nucleons using data collected by the COMPASS experiment at CERN. ...