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- PostDigitizing Mt. Washington INPs Time Series Data(2024) Stretesky, Denver; Chalmers tekniska högskola / Institutionen för rymd-, geo- och miljövetenskap; Chalmers University of Technology / Department of Space, Earth and Environment; Ickes , Luisa; Ickes, LuisaAs technology in computing has advanced, it has opened many new tools to aid researchers. Among these tools is neural networks. These will be utilized to digitize an old handwritten dataset taken from Mt. Washington Observatory. This dataset spans over 20 years and has the potential to aid our understanding of ice nucleating particles and their effects. Three overarching steps were identified when digitizing handwritten data: pre-processing, classification, and post-processing. The first two will be focused on here as they are the most important to the digitization process. It was also discovered how the errors in the pre-processing and classification affect the final model accuracy.
- PostLinear and nonlinear mapping of sea surface waves imaged by synthetic aperture radar(2025) Qefalija, Eltjon; Chalmers tekniska högskola / Institutionen för rymd-, geo- och miljövetenskap; Chalmers University of Technology / Department of Space, Earth and Environment; Eriksson, Leif; El Youncha, AnisOcean observation is a powerful tool for ocean monitoring of sea surfaces. With the help of SAR it becomes easier to monitor large wave fields. The purpose of this project is to provide a simulator which when given the wind speed and wind direction, to generate the ocean wave field equivalent to those parameters, to simu late the SAR image, and finally to provide the transform for the linear, quasilinear, and nonlinear mapping. In the simulation, an analysis is performed on the validity of the three transforms, where different wind speeds, wind directions, and Slant Range-Velocity ratios β are used. The results, show that the linear and quasilinear transforms can be used when the value is β is low. On the other hand, the non linear transform can always be used, in many different scenarios. Remaining work to be done is an inversion algorithm to extract the ocean parameters from the SAR spectrum, an analysis of the effect of the ocean currents and finally the analysis of nonlinear waves.
- PostThe effect of circularity and automation on the textile system in Sweden(2025) Bångsbo, Johanna; Chalmers tekniska högskola / Institutionen för rymd-, geo- och miljövetenskap; Chalmers University of Technology / Department of Space, Earth and Environment; Lundqvist, Ulrika; Lundqvist, Ulrika
- PostQuantifying the greenhouse gas reduction potential of battery electric cars with integrated photovoltaics(2024) Abedi, Sahar; Simangan Liggayu, Francis Jessy; Chalmers tekniska högskola / Institutionen för rymd-, geo- och miljövetenskap; Chalmers University of Technology / Department of Space, Earth and Environment; Johansson, Daniel; Morfeldt, Johannes
- PostComputational analysis of a combined heat and power steam turbine for a small modular reactor(2024) Räisänen, Sylvi; Chalmers tekniska högskola / Institutionen för rymd-, geo- och miljövetenskap; Chalmers University of Technology / Department of Space, Earth and Environment; Retegan Vollmer, Teodora; Lahdelma, Risto