Now showing items 21-40 of 540

    • Development of Advanced Generative Priors for MRI Reconstruction 

      Luo, Guanxiong (2024-05-02)
      This thesis investigates generative models for parallel compressed magnetic resonance imaging (MRI) reconstruction. The challenges of compressed MRI reconstruction using deep learning are identified, including model ...
    • Statistical Optimal Transport and its Entropic Regularization: Compared and Contrasted 

      Hundrieser, Shayan Max Ahmad (2024-04-26)
      In recent years, statistical methodology based on optimal transport witnessed a considerable increase in practical and theoretical interest. A central reason for this trend is the ability of optimal transport to compare ...
    • Controlling Data Streams of IoT Devices in Smart Homes from a User Perspective 

      Wickramasinghe, Chathurangi Ishara (2024-04-16)
      Increasingly, humans are surrounded by intelligent devices, such as smart devices, in the Internet of Things (IoT) context. These smart devices are used in various environments, such as smart environments as well as homes. ...
    • Generalizations of Quandles to Multi-Linkoids 

      Pflume, Runa (2024-04-10)
      In this thesis, we define the fundamental quandle of knotoids and linkoids and prove that it is invariant under the under forbidden-move and hence encodes only the information of the underclosure of the knotoid. We ...
    • Invariants of Kähler manifolds and Generalized Seiberg-Witten Equations 

      Bigorajski, Marcel (2024-03-06)
      The thesis explores the generalized Seiberg-Witten equations, a gauge theoretic differential equation arising in physics by coupling a non-linear spinor to a connection. The study involves an analysis of the solution space ...
    • The Spectra on Lie Groups and Its Application to twisted L2-Invariants 

      Han, Zhicheng (2024-02-29)
      We computed spectra of various $G$-invariant differential operators on the universal cover of 2x2 unimodular groups. This was achieved by applying tools from harmonic analysis/representation theory to corresponding groups. ...
    • Elliptic curves, modular forms, and the associated exponential sums 

      Bhakta, Subham (2024-02-27)
      This thesis focuses on the various arithmetic aspects of elliptic curves and modular forms. Employing the exponential sum estimates obtained from sum-product estimates for finite fields, we estimate exponential sums linked ...
    • Narrative Echoes across Time and Space 

      Pannach, Franziska Anne-Katrin (2024-02-16)
      Originating in mythological research, the Hylistic theory introduces hylemes as a basic plot unit, containing actions, states, or background information derived from a source. These statements are organized in hyleme ...
    • Matching Patterns with Variables in Approximate Settings 

      Siemer, Stefan (2024-02-12)
      In the literature dealing with patterns with variables, a word, also called string, is a sequence of terminal letters, while a pattern is a sequence of terminal and variable letters. The problem of deciding if there is a ...
    • An Integration Theorem for Representations of the Tangent Algebroid 

      Busche, Geoffrey-Desmond (2024-02-09)
      This dissertation investigates representations of Lie groupoids and Lie algebroids and the connection between them. Lie groupoids and Lie algebroids are differential-geometric generalisations of Lie groups and Lie ...
    • Toward Trustworthiness of Deep Learning Models for 12-Lead ECGs 

      Bender, Theresa (2024-01-31)
      A 12-lead electrocardiogram (ECG), a common examination tool in cardiology, represents the electrical activity of the heart as waveforms. Predictions and classifications with deep learning (DL) algorithms show great potential ...
    • A Multi-Layered Identity and Access Management Solution for Establishment of Scalable Federated Identity 

      Dabbaghi Varnosfaderani, Shirin (2023-12-22)
      Federated identity management (FIM) systems are defined as a group of organizations (entities) that have agreed to establish trust relationships and share identity information to enable seamless access to resources across ...
    • Improving the analysis of aeroacoustic measurements through machine learning 

      Goudarzi, Armin (2023-11-20)
      This thesis focuses on improving the analysis of aeroacoustic imaging methods using automated data processing and machine learning. Imaging methods result in beamforming maps that are challenging to explore manually since ...
    • Adaptive numerical methods for optimal and branched transport problems 

      Minevich, Olga (2023-11-20)
      Optimal transport is an area of mathematical research that has been gaining popularity in recent years in various application fields such as economics, statistics or machine learning. Two important factors behind its ...
    • Diophantine problems: inequalities and abelian varieties 

      Munkelt, Florian Maximilian (2023-11-10)
      In this thesis we consider the density of rational points near manifolds and a bound for the torsion on a simple abelian variety of type IV over a number field. In the first part the main result is an asymptotic for the ...
    • Service-Differentiated Cooperative Routing in the Internet of Things 

      Ayoub, Milad (2023-11-06)
      The IPv6 Routing Protocol for Low-power and Lossy Networks (RPL) was designed to operate with different Internet of Things (IoT) applications ranging from regular, to critical, to alarm/sporadic. That is due to its ability ...
    • Cyclotomic Norm Diophantine Equations 

      Chen, Han (2023-10-25)
      In this thesis, I consider two Diophantine norm equations. For the equation of the Nagell-Ljunggren equation $\frac{x^p-1}{x-1} = p^e y^q$ with distinct odd prime exponents $p, q$, I show that, for $p > 3$, it has no ...
    • A Wasserstein-like Distance on Vector Fields 

      Sommer, Vincent (2023-10-06)
      We introduce a new distance on the space of vector fields over a Riemannian manifold that is motivated by the construction and properties of the Wasserstein distance. The construction relies on a particular metric on the ...
    • Rational points and lines on cubic hypersurfaces 

      Bernert, Christian (2023-10-02)
      We study the solubility of cubic diophantine equations. In the first chapter, we discuss the convergence of the singular series of a cubic form, which is a central object in the study of the solutions of the associated ...
    • Mathematics of Biomolecular Structure Experiments 

      Wiechers, Henrik (2023-09-29)
      One of the main objectives of structural biology is to understand the complicated three-dimensional structure of biomolecules, and thus provide meaningful links between structure and functionality. There is a wide range ...