Ph.D. Theses

Monte Carlo simulations are an important tool in high-energy physics, e.g. to test the predictions of theory models or to infer a priori unknown parameters of the models. [...]

Feynman integrals are central to the calculation of scattering amplitudes both in particle and gravitationalwave physics. This thesis presents advancements in both the analytical and algebraicstructure of these integrals and shows how this can be used for efficient evaluation of these integrals.Paper I. [...]

Exploiting the Stark effect, neutral polar molecules can be focused and decelerated in an array of time-varying inhomogeneous electric fields in alternating-gradient configuration. Using this principle, a new experiment for the focusing and deceleration of large molecules from a molecular beam has been set up. [...]

Protein-protein interactions are critical for most physiological andpathophysiological processes. Detailed characterization of these interactions is thereforeessential not only to understand the nature of these events, but also to design strategiesto target these interactions. [...]

Plants must quickly adapt to their surroundings due to their sessile nature. Their ability to adjustand thrive in diverse environmental conditions directly impacts their growth and development.This is especially critical for crop plants, where quantity and quality are vital to secure properglobal nutrition. [...]

Aspects such as conformational flexibility and chirality play a critical role in biochemical and pharmacological processes. Therefore, a comprehensive understanding of molecular structure, intra- and intermolecular forces, and chirality is required to comprehend the interplay between the three-dimensional structure of a biomolecule and its functionality. [...]

The formation of microstructures is a crucial step for steelmakers. In the case of DP steels, used for automotive construction, this formation takes place during intercritical annealing after cold-rolling [...]

Precision measurements of Standard Model processes are a fundamental part of experimental particle physics. Diboson channels at the Large Hadron Collider (LHC) are interesting processes for precision measurements since the relatively high cross-sections and low background contamination allow for small uncertainties. [...]

Documenting the evolution of flexible and stretchable electronics, this thesishighlights the shift from traditional circuits to innovative designs that leveragematerials like organic semiconductors and advanced substrates for enhancedmechanical, optical, and electrical properties.Recent advancements in flexible electronics, primarily due to effective management of bending strain, have unlocked diverse applications including wearabletechnology, flexible solar cells, bio-integrated devices, and notably, stretchableorganic displays, with the latter being a focal point of this project. While bendabledesigns have successfully entered commercial production, the development ofstretchable applications continues to pose significant challenges.The focus here is on optimizing each element of organic light-emitting diodes,from elastomeric substrates and electrodes to active organic layers, balancingperformance with cost-effectiveness for potential mass production. [...]

Climate change, antibiotic resistances and environmental pollution are growing threats. Therefore, finding alternatives for fossil resources and discovery of new pharmaceuticals grows more important every day [...]