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Climate Change Impacts on Snow Avalanche Risk in Alpine Regions
(2023)Various studies demonstrate the impact of climate change on the cryosphere and its associated snow cover. A decrease in mean snow depth, as well as the spatial extent and duration of the snow cover, has been documented worldwide in various regions, and their context of climate change was proven. The influence of climate change on avalanches is a subject of ongoing research, and the detailed impacts are not yet fully known. The formation ...Doctoral Thesis -
Connecting the Dots: Combining Points and Lines for more Robust and Accurate Local Features
(2023)Local features are the building block of most multi-view applications such as localization and mapping, 3D reconstruction, and neural rendering, to obtain a highly accurate 3D geometry of a scene. Thus, local features are expected to be accurate, but also to be efficient and versatile to different tasks and conditions. This thesis explores some of the limitations of modern local features and offers solutions, with a particular focus on ...Doctoral Thesis -
Experimental quantification of deadwood influence on rockfall dynamics and its incorporation into regional-scale rockfall models
(2022)Mountain forests provide an essential protective function against natural hazards. Various studies predict higher tree mortality and susceptibility to natural disturbances such as windthrow, bark beetle infestation, and forest fires as a result of future climate and legacies of land-use history. Therefore the fundamental research question of this thesis arises: Can disturbed mountain forests with lying deadwood still protect against ...Doctoral Thesis -
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From Ferroelectricity to Quantum Paraelectricity — Evolution and Doping from First Principles
(2022)Quantum paraelectric materials like SrTiO3 and KTaO3 exhibit many unusual material properties arising from their quantum fluctuations, including a high dielectric constant and unconventional uperconductivity. In combination with other unusual properties like strong spin orbit coupling and charged ionic layers in KTaO3, this leads to the observation of various intriguing phenomena. The primary goal of this thesis is to investigate these ...Doctoral Thesis -
Ice spheres in snow mechanics: microstructural analyses, experiments, and simulations
(2021)Doctoral Thesis -
Statistical Solutions for the Incompressible Euler Equations with Finite Volume Methods
(2021)The theoretical understanding of the fundamental equations of fluid dynamics, the Navier-Stokes and Euler equations, is currently limited, and results of existence and uniqueness of their solutions are not known in a general setting. Statistical solutions have been recently proposed as a suitable framework for the formal treatment of turbulence. These are defined as a probability measure in a space of integrable functions, which verify ...Doctoral Thesis -
Reliability-based code calibration for timber in fire
(2021)For the design of structures, codes such as the Eurocode guarantee the required structural safety, both for the permanent and the fire design. In timber construction, the fire resistance is usually verified with the standard fire curve, since Eurocode provides simple and accurate design models for this exposure. The current Eurocode for timber in fire (EN 1995-1-2:2004) has evolved historically and uses the 20% fractile value for the ...Doctoral Thesis