Ph.D. Theses

The integrability properties of $\mathcal{N}=4$ Super-Yang-Mills in the planar limit have been studied extensively and are well understood. For certain classes of theories, obtained by orbifolding $\mathcal{N}=4$ Super-Yang-Mills, it was shown that planar integrability is actually inherited and persists at the orbifold point. [...]

Ultraviolet (UV) light plays a crucial role across various scientific fields such as biochemistry, material science and nanotechnology. Producing and using UV pulses with sub-5 fs durations is extremely demanding, but offers new possibilities for studying electron dynamics in light-induced biochemical re- actions.This thesis presents a tuneable ultrafast UV source operating at high repetition rates (up to 50 kHz), designed to be the key component of a table-top few-femtosecond UV-pump and IR-probe beamline to perform time-resolved spectroscopy measurements. [...]

This thesis work presents the first searches and the first evidences for the $_{t}WZ$ and $_{t}W_γ$ processes at the LHC with the CMS experiment. The analyses employ proton-proton collision data corresponding to an integrated luminosity of 138 fb$^{−1}$ collected during Run 2 of the LHC between 2016 and 2018. [...]

Antibiotic resistance in Gram-negative bacteria, especially Pseudomonas aeruginosa, presents significant challenges in treating infections, particularly in hospitalized and immunocompromised patients. This pathogen secretes various virulence factors, including phospholipases, which play critical roles in its pathogenicity.This study focused on characterizing two phospholipases, PLCH and PLCN. [...]

This thesis is concerned with consistency, robustness and sparsity of supervised and semi-supervised learning algorithms. For the latter, we consider the so-called Lipschitz learning task (Nadler, Boaz, Nathan Srebro, and Xueyuan Zhou. [...]

With the advancement of climate change, greenhouse gas emissions in all aspects of society must be reduced, including research. Particle collider and free-electron laser (FEL) facilities have become increasingly large as their scientific reach has been extended by using higher-energetic particles. [...]

Chiral molecules are life’s building blocks, making the study of their ultrafast processes a pursuit across various fundamental research fields. The results presented in this dissertation contain methodological, technical and scientific advancements that pave the way for future time-resolved, site-specific investigations into chiral photochemistry of randomly orientated molecules, using photoelectron circular dichroism and free-electron lasers. [...]

Proteins fulfil various essential functions in all known life forms and modern biotechnology enabled their use in experimental, medical, and industrial applications. Knowledge about the structure and function can be used to optimize proteins for these applications and finds use in drug discovery, if a the protein originates from a pathogen. [...]

Understanding the structural transformations affecting nanomaterials is essential to rationally improve their properties and functionalities. Despite recent advances in several X-ray investigation routines, the transformation phenomena affecting nanomaterials entail structural modifications on several length scales that cannot be covered by a single analytical method. [...]