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Assessing the potential to strengthen the resilience of the Swiss hydropower sector based on understanding the role of weather regimes in a changing climate
(2021)Mitigating climate change requires a major transformation of energy production with an increasing shift from fossil fuels to renewable energy sources, such as wind and hydropower. These, however, are strongly affected by local weather conditions and their future potential might be influenced by climate change. Thus, it is essential for decision-makers in the energy sector to integrate information about climate change in their long-term ...Doctoral Thesis -
Hydrogeological gravity anomalies in the Bedretto tunnel
(2021)The geomechanics of a rock body are strongly impacted by the present stress regime. Fault zones influence the stress regime as well as the hydraulic response of the groundwater flow. With geophysical methods such as gravity surveys it is possible to investigate these fault zones in terms of their extent, their orientation and their impact on the gravitational field and therefore, also on the stress regime. The Bedretto laboratory is ...Bachelor Thesis -
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Plant Water Relations in Response to Drought and Different Cropping Systems
(2021)Agriculture is one of the main contributors to climate change and is also severely threatened by the consequences of the changing climate. To reduce the environmental pressure from agriculture, sustainable practices are urgently in need of evaluation and implementation. In croplands, organic farming and conservation tillage can reduce energy consumption, greenhouse gas emissions, and pollutant production as well as increase carbon ...Doctoral Thesis -
Does climate change influence the frequency of large rock slope failures?
(2021)Anthropogenic climate change has increased the mean annual air temperature by 1.4 °C in the European Alps between 1906 and 2005. Several studies have highlighted an increase in fragmental rock mass fall (< 10'000 m³) during the periods with warmer air temperature, linking it to permafrost degradation. A significant increase of rockfall activity since 1990 and above 2000 m a.s.l. was detected at local (e.g. Mont Blanc Massif) and regional ...Master Thesis -
Scalable Drawing of Nested Directed Acyclic Graphs With Gates and Ports
(2021)Graphs are a popular concept throughout all of computer science, from networking through data management to machine learning. This has given rise to the problem of automatic graph drawing, yet efficient and aesthetically-pleasing graph layouting is as diverse as the underlying graph characteristics. In this thesis we deal with graphs that not only can be nested in two different ways, but in which nodes also have ports. We derive two ...Master Thesis -
Accelerating BLAS with HBM on FPGAs in DaCe
(2021)In recent years FPGAs have gained interest by the high performance community because they can allow to greatly reduce the data movement compared to typical load-store architectures. However, for memory bound operations FPGAs tend to be slow due to their limited memory performance. To solve this issue the major FPGA companies started inte- grating High-Bandwidth Memory (HBM) into their devices. The DaCe Framework provides an abstraction ...Bachelor Thesis -
Multi-wafer ion traps for scalable quantum information processing
(2021)In this work, I present the design, fabrication and initial characterisation of a 3-dimensional segmented ion trap with two junctions of the X-type. The trap wafers are manufactured using selective femtosecond laser-etching of silica glass. This technology allows for the machining of flexible 3-dimensional features, and expands the types of trap geometries that can be achieved compared to previously used manufacturing methods such as ...Doctoral Thesis -
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Occupancy forecasting for building energy MPC
(2021)Energy consumption of buildings contributes significantly to the global energy usage. Conventional Rule Based Control (RBC) ensures maintaining comfort constraints for occupants even during unoccupied times. The energy usage could, however, be decreased by relaxing the comfort constraints for unoccupied periods. A common approach to solve this problem is to employ Model Predictive Control (MPC) with a preliminary fixed occupancy schedule ...Master Thesis