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Designing a Controller for Walenstadt’s Battery Energy Storage System in Islanded Grid
(2023)This Master’s thesis investigates the development of a controller for the battery energy storage system (BESS) in Walenstadt that can ensure stability of the local microgrid in islanded operation. A grid-forming control scheme based on enhanced direct power control (EDPC), including frequency and voltage droop control, is employed. A phase-locked loop ensures synchronization to the grid and provides the required reference angle estimate. ...Master Thesis -
Linking spatial analyses of forest transitions with perceived land use changes in the context of infrastructure development
(2023)Landscapes in South East Asia are changing rapidly. In the Lao People’s Democratic Republic (Laos) large-scale infrastructure development is ongoing. At the same time, Laos has one of the highest forest covers in the region and set the ambitious goal to increase forest cover to 70% country area. It is unclear, if increased accessibility through infrastructure development can lead to a forest transition - a shift from net deforestation to ...Master Thesis -
Mapping agroecology in Switzerland
(2023)The intensification and globalization of agriculture has led to the unfolding of significant environmental, economic and social problems in the food system. Agroecology has emerged as a path towards the solution of these crises. Its relevance as a holistic paradigm for food system transformation has been widely recognized. To support its expansion, the mapping of agroecology has emerged as an essential tool to document its development and ...Master Thesis -
Enabling Value Recovery of HVAC Systems towards a circular built environment-Status Quo and Challenges
(2023)Heating, Ventilation and Air Conditioning (HVAC) Systems in buildings are extensively studied in the areas of operational efficiency and design for indoor comfort but limited in terms of material efficiency and embodied carbon. Circular economy is found to have immense potential to curb the impending resource depletion and reduce embodied carbon. It is seen that the application of circular principles on HVAC systems has been researched ...Master Thesis -
All hands on deck: How aerial imagery can support inclusive participatory landscape decision-making
(2023)Land-use management is crucial for reconciling competing ecological, social, and economic interests in the face of sustainability challenges such as climate change, food security, and biodiversity conservation. To ensure landscape management decisions are sustainable, resilient, and relevant for the community they impact, participatory landscape decision-making engages stakeholders from various sectors and prioritizes local involvement ...Master Thesis -
Data-driven Learning and Optimization-based Control for HVAC Systems in SBB Trains
(2023)In Switzerland, the demand for public transport has not only recovered but also surpassed pre- COVID-19 levels. The Swiss Federal Railways (SBB) aims to meet this progressive demand without exceeding an annual energy consumption of 2’500 GWh. To achieve this, it is essential to enhance the energy efficiency of the railway network and trains. The Heating, Ventilation, and Air Conditioning (HVAC) systems, account for a considerable fraction ...Master Thesis -
Privacy Observation
(2023)The widespread practices of data collection and tracking on the internet drive the business models of numerous web services, which was demonstrated by numerous prior research. Despite the emergence of privacy regulations and technologies, their impact on data collection practices remains understudied. In a continuously evolving online landscape, unlike long-term studies, one-time web measurements have several limitations in their ...Master Thesis -
Nuclear propulsion and space microreactors
(2023)This thesis started with the goal of developing SPARTACUS, a toolbox to assess the feasibility of a space mission propelled by nuclear electric propulsion (NEP) or nuclear thermal propulsion (NTP), and how they compare with classical chemical rocket propulsion. While NEP uses a very high specific impulse (ISP) electric thruster powered by a nuclear fission reactor to generate low-thrust for long periods of time, NTP uses a fission reactor ...Master Thesis -
Full Waveform Inversion for Medical Ultrasound Tomography in Julia on multi-xPUs
(2023)This Master's Thesis aims to develop efficient yet user-friendly tools to perform seismic tomography using the Full Waveform Inversion (FWI) approach, as derived from the field of Earth sciences, and apply them in the realm of ultrasound medical tomography. Since its introduction in geosciences a few years ago, FWI has provided spectacular images of the Earth's subsurface at different scales, revealing, with unprecedented details, the ...Master Thesis -
Quantifying Markov Chain Monte Carlo Exploration of Tumour Progression Tree Spaces
(2023)Understanding the mutational intra-tumour heterogeneity within tumours is crucial to developing effective personalised cancer therapies. Bayesian Markov chain Monte Carlo (MCMC) sampling schemes have proven successful and trusted in reconstructing tumour progression histories, particularly mutation trees. To understand the effectiveness of mutation tree MCMC methods and their required runtimes, it is crucial to understand how quickly the ...Master Thesis