Ph.D. Theses

Spectral Deferred Correction (SDC) is a method for numerically integrating initial value problems. The method iteratively generates solutions to fully implicit Runge-Kutta methods with forward substitution using low order solves. [...]

Understanding how microstructural features govern macroscopic properties is a central topic in materials science. Conventional experimental methods, although powerful, face limitations in resolving complex spatiotemporal phenomena and in providing sufficient data for quantitative modeling. [...]

All-solid-state lithium batteries (ASSBs) are considered a promising future battery technology due to their high safety and energy density. However, they are suffering from mechanical fatigue during cycling, caused by induced mechanical stresses by volume changes in the electrode active materials which is constrained by the solid electrolyte. [...]

Cost-Optimal Energy Deficits in Renewable Energy Systems. Fossil energies threaten human prosperity through environmental pollution, which is why renewable energies are needed as a sustainable alternative. [...]

Since the first observation of dislocations in the mid 1950s, when electron microscopy was used to visualize these defects, there have been significant advancements in microscopy techniques, allowing for the acquisition of high-quality, high-resolution dislocation image data. Today, it is even possible to perform in-situ mechanical testing, enabling the observation of dislocation microstructure evolution during the plastic deformation of materials. [...]

The digital transformation of Materials Science and Engineering (MSE) is essential for accelerating the development of novel materials and enhancing understanding of the materials life cycle, encompassing raw resources, functional materials, engineered components, and beyond. This transformation entails integrating computational methods, data science, and artificial intelligence (AI) to advance the field of MSE. [...]

The process–structure–property (PSP) linkage forms the foundation of modern materials science. It describes how manufacturing processes shape microstructural features, which in turn govern a material’s properties. [...]

Soil moisture is a key variable in the water and energy cycles at the atmosphere-land-vegetation interface. Accurate and continuous soil moisture data are essential for many applications, including water resources management, drought monitoring, and agricultural forecasting. [...]

As the world seeks cleaner and more efficient energy solutions, solar power has emerged as a key renewable option. Among the various technologies, III-V multi-junction solar cells absorb an extended range of the solar spectrum and thus achieve the highest conversion efficiencies in photovoltaics today. [...]

Proton-conducting electrolysis cells (PCECs) are critical to sustainable energy technologies, as they enable the production of undiluted hydrogen that can be readily compressed and stored. These cells are essential for establishing a hydrogen economy. [...]