Doctoral Thesis
Neueste Zugänge
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Microplastic in soil - waterdynamics, hydrophobicity, and interactions
(2024)Soils are considered as large sinks of microplastic (MP, diameter < 5 mm). Sources of MP contamination are identified as mismanagement of plastic containing waste, the use of plastics in agriculture as well as the neglected life cycle of plastic containing products. The long-range transport of airborne MP, its subsequent deposition and the degradation of larger plastic fragments are a potential source and pathway of MP input into soils. ...Doctoral Thesis -
Evaluating interventions and defence mechanisms in bacterial symbiosis and pathobionts
(2024)Doctoral Thesis -
Mechanisms that link climate, soil properties and microbes to macroscale soil organic carbon dynamics: Insights from a geoclimatic gradient
(2024)Adequate representation of the soil organic carbon (SOC) cycle at the macroscale (km to global) is important in order to understand and predict the implications of SOC dynamics for the climate and our planet. Such adequate representation is challenging, because mechanistic knowledge about soils is derived from the much smaller mesoscale (mm to m). However, the dominant mechanisms and controls of the SOC cycle vary across scales. Therefore, ...Doctoral Thesis -
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Medical Tool Localization with Hall-Effect Sensors in Electromagnetic Navigation Systems
(2024)Remote magnetic navigation (RMN) offers a wide range of possibilities, particularly in the realm of minimally invasive interventions. With the increased dexterity and precise catheter tip control of magnetically actuated medical devices, surgeons can navigate more complex environments. However, in minimally invasive surgeries, the need for tool visualization feedback is essential. Fluoroscopy has long been the gold standard for visualizing ...Doctoral Thesis -
Advancing Human Skin Equivalents Through Engineering Solutions
(2024)The skin, as the body's largest organ, serves crucial functions in protection, temperature regulation, and sensory perception. However, skin injuries and diseases often challenge natural healing mechanisms posing major health challenges that affect a large percentage of the population worldwide. In response, human skin equivalents (HSEs) comprising human skin cells have emerged as crucial models for investigating disease mechanisms and ...Doctoral Thesis -
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Enhancing the Adoption of Additive Manufacturing in Industry using Principles of Agile Hardware Development
(2024)Additive manufacturing (AM) technologies are increasingly adopted for the development and production of physical products. Nevertheless, the industrial adoption of AM still represents a major challenge for manufacturing companies. AM can lead to significant implications at the adopting firm, with the potential to fundamentally transform existing value chains. One promising approach to overcome the uncertainty and complexity of AM adoption ...Doctoral Thesis -
Understanding the impacts of climate variability and change on rainfed crop production in Ethiopia
(2024)Doctoral Thesis -
Nonplanar Layered Morphologies
(2024)This thesis investigates the potential of nonplanar robotic 3D printing for architectural applications and develops novel methods to design nonplanar print paths for medium to large-scale robotic FDM 3D printing. Latest developments in additive manufacturing have opened new possibilities for 3D printing objects with unprecedented geometric complexity. However, these advancements are still hindered by the inherent limitations of current ...Doctoral Thesis -
Control of Large-Scale Discrete-Time Systems - Dissipativity, Optimality, and Learning
(2024)Society faces a number of major global challenges, including climate change mitigation, healthcare and quality of life improvement, and design of smart infrastructures such as those in transportation, water, food, and energy systems. Control theory plays a central role in the development of technologies and solutions for many of these key problems. The ever complex requirements of the global challenges when it comes to control solutions ...Doctoral Thesis -
Unravelling Causes of Biodiversity Gradients in Tetrapods via Eco-Evolutionary Simulations
(2024)Species and clades of tetrapods - amphibians, birds, mammals and reptiles - are not distributed randomly across the globe but follow gradients of latitude, elevation as well as varying in space and time. These biodiversity gradients in tetrapods vary equally depending on which dimension of diversity - taxonomic, phylogenetic or functional - is studied and which metric is used to summarize that specific dimension. Different metrics quantifying ...Doctoral Thesis -
Efficient Annealing and Particle Displacement for Sequential Importance Sampling Algorithms
(2024)Sampling algorithms play a pivotal role in various domains where probabilistic models with intractable normalized density functions are utilized. Sequential Importance Sampling (IS) algorithms gradually update particle state with simple transitions starting from a simple tractable distribution. Many possess convergence guarantees with lengthy sequences. Annealed Importance Sampling (AIS) and its variants are the most popular methods used ...Doctoral Thesis -
Production of extracellular vesicles and investigation of their use as nucleic acid carriers
(2024)Doctoral Thesis -
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Trusted Computing on Modern Platforms: Analysis, Challenges, and Implications
(2024)Computing architectures come in all forms and shapes, and they impact our daily lives significantly. Smartphones are omnipresent, most jobs require daily interactions with computers, and leisure time is dominated by the availability of decades worth of TV shows at the tip of a finger. As computing architectures dominate many fields, they must also process confidential data, from medical data and e-voting to personal communications in ...Doctoral Thesis -
Accelerator mass spectrometry below 300 kV
(2024)A prototype of a compact, low-energy, multi-isotope accelerator mass spectrometer (MILEA) with a maximal terminal voltage of 0.3 MV was built at ETH Zurich in 2017. The presented work eval- uates the capabilities of the new system and thereby investigates ion beam physics at low energies. The findings of this work allowed to optimize the operational parameters for AMS measurements of 10Be, 26Al and uranium at low energies (<1 MeV). The ...Doctoral Thesis -
Tree planting: How new state strategies of forest governance, community ownership, and consultation lead to uneven outcomes for communities and places
(2024)With a forest cover of 18%, Scotland is one of the least forested countries in Europe. The loss of forest cover in Scotland took place throughout the Middle Ages up until the 19th century, due to iron works, demand for charcoal and tanbark, and industrialization. After the timber shortage of the first world war, the UK government established the Forestry Commission in 1919 with powers to acquire land throughout Britain for securing Timber ...Doctoral Thesis