Kvalifikační práce
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Zobrazují se záznamy 601-640 z 11242
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Investigation of effects of femtosecond laser pulses on spintronic structures
Výsledek obhajoby: UZNÁNO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2024)Datum obhajoby: 4. 1. 2024This thesis is focused on a detailed investigation of the optically induced quench switching effect in different films of antiferromagnetic CuMnAs. The quench switching effect was recently discovered to be highly reproducible ... -
CSV file validator according to the CSV on the Web W3C recommendations
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2024)Datum obhajoby: 14. 2. 2024The comma-separated values (CSV) format is a popular format for tabular data on the web. It stores tables of data in a very simple textual way, but it stores only the values of the table without their meaning and structure. ... -
Promises in Satisfaction Problems
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 14. 8. 2023Short Abstract This thesis focuses on the complexity of the promise version of Constraint Satisfaction Problem (CSP) and its variants. The first study concerns the Promise Constraint Satisfaction Problem (PCSP), which ... -
Structure and complexity of homomorphisms
Výsledek obhajoby: UZNÁNO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2024)Datum obhajoby: 4. 3. 2024This thesis is concerned with computational complexity aspects of graph homomorph- isms and related concepts. We are mainly interested in various polynomial time versus NP-complete dichotomies. These results are especially ... -
Distributed Graph Query Engine Improvements for Big Data Graphs
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 11. 12. 2023Graph pattern matching queries enable flexible graph exploration, similar to what SQL provides for relational databases. In this thesis, we design and improve key compo- nents of a distributed in-memory graph querying ... -
Geometrická teorie funkcí a aplikace v nelineární elasticitě
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 20. 11. 2023This thesis is divided into two parts. The first part focuses on mappings in Rn and the weak limits of homeomorphisms in the Sobolev space W1,p . Our primary concern is the concept of "injectivity almost everywhere". We ... -
Bridging the Gap: Towards Unified Approach to Perfect and Imperfect Information Games
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2024)Datum obhajoby: 12. 3. 2024From the onset of AI research, games have played an important part, serving as a benchmark for progress in artificial intelligence. Recent approaches using search in combination with learning from self-play have shown ... -
Weak Solutions to Mathematical Models of the Interaction between Fluids, Solids and Electromagnetic Fields
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2024)Datum obhajoby: 23. 1. 2024Weak Solutions to Mathematical Models of the Interaction between Fluids, Solids and Electromagnetic Fields Abstract We analyze the mathematical models of two classes of physical phenomena. The first class of phe- nomena ... -
Web application for keyword-aware walking route search
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2024)Datum obhajoby: 5. 2. 2024Most mainstream web mapping applications implement location-based direction search. The typical workflow involves constructing an explicit sequence of places to visit. In this thesis, we aim to develop a web application ... -
Model theory and extremal combinatorics
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 27. 9. 2023This thesis is concerned with combinatorial properties of homogeneous structures such as the Ramsey property, big Ramsey degrees, EPPA, and others. What these properties have in common is that, while being finitary problems ... -
Proof Complexity of CSP
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2024)Datum obhajoby: 20. 2. 2024In this thesis we formalize Zhuk's decision algorithm solving in p-time tractable con- straint satisfaction problems (CSPs) in a weak theory of bounded arithmetic W1 1 . As a consequence, we show that tautologies that ... -
Prediction of ligand binding sites from protein structure
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 31. 3. 2023Ligand binding site prediction from protein structure is a fundamental prob- lem in the field of structural bioinformatics that has many applications related to the elucidation of protein function and structure-based drug ... -
Jerry - aplikace pro sdílení klávesnice a myši
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2024)Datum obhajoby: 5. 2. 2024The goal of the thesis is to develop a program that enables the control of multiple computers from a single workstation using a unified set of input devices. The program comprises a control application for Windows OS and ... -
Webová aplikace pro výuku množin bodů dané vlastnosti
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2024)Datum obhajoby: 8. 2. 2024This thesis discusses loci of points. The thesis is constructed as a website which should assist mathematic education in primary schools and especially high schools. The thesis revises loci of points, which is taught in ... -
Viskoelastická deformace planetárních těles
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2024)Datum obhajoby: 7. 2. 2024Loading a planet's surface causes it to deform. The evolution of this deformation is influenced by the internal structure of the planet. In this thesis we use a one-dimensional numerical model of Maxwell viscoelastic ... -
6D pose estimation of objects in images
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2024)Datum obhajoby: 14. 2. 2024The 6D pose estimation is an important computer vision task with applications in robotics, e.g. for manipulation or grasping, but also in computer graphics and augmented reality. Given an image, the task is to estimate the ... -
Postupy pro statistickou kontrolu náhodných procesů
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2024)Datum obhajoby: 7. 2. 2024Procedures for statistical control of random processes are well known. What we miss, is the comparison of such procedures. In the beginning, we will introduce the linear regression model which will be our assumption ... -
Algonauts challenge 2023: predicting human fMRI activity in response to visual stimulation
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2024)Datum obhajoby: 13. 2. 2024In this thesis, we investigate the application of pretrained Deep Neural Networks, par- ticularly Vision Transformers (ViT), for predicting human fMRI activity in response to visual stimulation. The Algonauts Challenge ... -
Point Cloud Rendering Approaches for Camera Pose Verification
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2024)Datum obhajoby: 13. 2. 2024Visual localization is the problem of estimating the 6 degrees of freedom camera pose from which a query image was taken relative to a known reference scene representation. It is the key for applications such as Augmented, ... -
Evolution strategies for policy optimization in transformers
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2024)Datum obhajoby: 13. 2. 2024We explore the capability of evolution strategies to train a transformer architecture in the reinforcement learning setting. We perform experiments using OpenAI's highly parallelizable evolution strategy and its derivatives ... -
Fuzz testing of network subsystem in PikeOS
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2024)Datum obhajoby: 5. 2. 2024Stability under every possible circumstance is a goal for a lot of applications. This problem applies to the network stack ANIS of the real-time operating system PikeOS developed by SYSGO. PikeOS requires security and ... -
Thermophoretic and Hydrodynamic Interactions in Artificial Active Matter
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2024)Datum obhajoby: 8. 2. 2024The study of artificial active matter has significantly intensified in recent years due to its potential practical applications and promises to understand living organisms' in- teractions and collective behaviour. The ... -
Geometrická zobrazení ve středoškolské matematice
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2024)Datum obhajoby: 8. 2. 2024The current availability of computers and mobile devices in school facilities and the affordability of mobile devices for everyone provide for an increasing use of interactive geometry in the curriculum. The aim of this ... -
Rozpoznávání retinopatie ve snímcích sítnice pomocí strojového učení
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2024)Datum obhajoby: 13. 2. 2024In collaboration with the Institute for Clinical and Experimental Medicine (IKEM) and leveraging their historical examination data, we developed a convolutional neural net- work trained to identify diabetic retinopathy ... -
Rozšíření kolizního modelu hlavního pásu asteroidů
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2024)Datum obhajoby: 14. 2. 2024The Main Belt, the region between the orbits of Mars and Jupiter, is the home to more than 1 million asteroids. These asteroids form orbital groups, i.e., asteroid families formed by collisions; and also spectral groups ... -
Větné reprezentace s interpretací podobnosti
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2024)Datum obhajoby: 13. 2. 2024Sentence representations - embeddings - obtained from neural network models are the core part of many applications in both academia and industry. Although embeddings reach great results in correlation with human sense of ... -
Extension of smoothed particle hydrodynamics based on Poisson brackets
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2024)Datum obhajoby: 9. 1. 2024The thesis aims to find a generalization of smoothed particle hydrodynamics to fluid models which are compatible with Hamiltonian formulation of physics. We develop an approach based on a particle discretization of Poisson ... -
Low-resource methods for dialogue systems applications
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2024)Datum obhajoby: 9. 2. 2024This thesis focuses on developing and improving task-oriented dialogue systems design in the rapidly growing landscape of artificial intelligence and natural language processing. We propose techniques that can substantially ... -
Nanostructures for solar cells: controlling the surface electronic properties by monolayers of carborane molecules
Výsledek obhajoby: UZNÁNO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 12. 12. 2023Doped layers of crystalline silicon are currently the main driver of con- ventional photovoltaic devices. Direct introduction of group III and V atoms into the silicon matrix is still the mainstream of mass production of ... -
Two-phase scheduling with unknown speeds
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2024)Datum obhajoby: 16. 2. 2024Speed-robust scheduling is a two-stage scheduling problem with a makespan objective. We are given processing times of n jobs, number of machines m and number of bags b. We have to group the jobs into bags that are to be ... -
Optical methods for characterization of semiconductor radiation detectors
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2024)Datum obhajoby: 24. 1. 2024CdZnTe and perovskites are promising materials for radiation detectors. Here, we address the main obstacles to their application, CdZnTe charging, and perovskite stability by photocurrent measurements. In the first part, ... -
Algebraic Tools in Combinatorial Geometry and Topology
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2024)Datum obhajoby: 28. 2. 2024In this thesis we study combinatorial problems through the lenses of the exterior alge- bra. This algebra is a natural object to model set systems as well as simplicial complexes. Moreover, it is possible to translate the ... -
Properties of function spaces and operators acting on them
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2024)Datum obhajoby: 4. 1. 2024The present thesis is focused on the study of properties of function spaces con- taining measurable functions, and operators acting on them. It consists of four papers. In the first paper, we establish a new characterization ... -
Distance magic labelings
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2024)Datum obhajoby: 16. 2. 2024Title: Distance Magic Labelings Author: Hayden Pfeiffer Department: Dept. of Theoretical Computer Science and Mathematical Logic Supervisor: doc. Mgr. Petr Gregor, Ph.D., KTIML, MFF UK Abstract: A distance magic labeling ... -
Výuka objemů a povrchů oblých těles na střední škole s podporou webové aplikace
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2023)Datum obhajoby: 8. 9. 2023This thesis is focused on the volume and surface area of solids, particularly on the volume and surface area of polyhedra and round solids, which are part of the high school curriculum of geometry (stereometry). The purpose ... -
Tennenbaum phenomena in models of arithmetic
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2024)Datum obhajoby: 5. 2. 2024The main aim of this text is to present and investigate some basic arithmetical func- tions and relations with regard to being recursive in a countable non-standard model of Peano arithmetic, PA for short, or some weaker ... -
Automatizace generování popisů produktů pomocí neuronových jazykových modelů
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2024)Datum obhajoby: 5. 2. 2024Product descriptions are an important part of product presentation in e-commerce. This bachelor thesis explores the possibilities of using language models based on the Transformer architecture to generate product descrip- ... -
Multi-agent trading environment for training robust reinforcement learning agents
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2024)Datum obhajoby: 13. 2. 2024This thesis presents a comprehensive study of the application of reinforcement learning to algorithmic trading. The main focus of this thesis is on the generalization properties of various reinforcement learning algorithms, ... -
Analysis of topological magnetic phases using generative machine learning models
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2024)Datum obhajoby: 8. 2. 2024 -
Polomřížky a nerozložitelné prvky
Výsledek obhajoby: OBHÁJENO(Univerzita Karlova, Matematicko-fyzikální fakulta, 2024)Datum obhajoby: 7. 2. 2024This thesis concerns the theory of semilattices, which are non-trivial discrete additive submonoids of Rn , which are contained in a cone. Special emphasis is on their indecomposable elements. The most important example ...