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Empirische Evaluation der Reisezeitveränderung in der Schweiz von 1950 - 2005
(2012)Die interdisziplinäre Untersuchung von raum-zeitlichen Veränderungen ist der Kern der geografischen Forschung. Diese Arbeit greift eine raum-zeitliche Problemstellung aus der Verkehrsplanung auf: die Reisezeiten. Diese haben sich sowohl im öffentlichen als auch im privaten Verkehr in der Schweiz in den letzten Jahren stark verändert. Diese interdisziplinäre Arbeit an der Schnittstelle zwischen der Verkehrsplanung und Geovisualisierung ...Master Thesis -
Hierarchical Population Generation in Transportation Modelling
(2014)Synthetic populations are necessary for agent-based travel models. However, conventional approaches based upon reweighting data from an available small sample suffer from low heterogeneity; simulation-based methods are promising, but have not so far taken into account hierarchies in the data. The aim of this thesis is to develop a simulation-based approach for population synthesis that allows to consider hierarchies, as in the case of ...Master Thesis -
Evaluation of Dynamic Public Transport Pricing with MATSIM
(2013)With emergence of digital fare payment systems, the resolution of problems such as growing amount of air pollution or concentration of congestion around peak hour be- comes feasible by the implementation of dynamic pricing schemes. But, because of the complexity and the difficult acceptance of these strategies by the populations, re- search need to be accomplished beforehand in order to show clearly the benefits brought. In this thesis, ...Master Thesis -
Congestion pricing schemes controlled by the gMFD: a comprehensive design and appraisal to bridge the engineering and economic perspective
(2013)Charging drivers for the congestion they cause is a well-known concept among economists, traffic engineers and transport professionals. Many studies have been performed to explore and better address this issue during the history of transport economics and in recent years the first congestion pricing schemes have been finally implemented in some cities (Singapore, London, Stockholm). Nonetheless, several theoretical and practical problems ...Master Thesis -
Comparison of Small Area Estimators in Forest Inventory using Airborne Laserscanning Data
(2013)Master Thesis -
Investigating the origin of leaks within the steel casing of deep geothermal boreholes at the Soultz EGS site
(2012)The Enhanced Geothermal System (EGS) built at Soultz has three deep wells drilled to 5000 m. The wells form a triplet with two producers (GPK2 and GPK4), and a central injector (GPK3). The reservoir was created by injecting fluid at high pressure into each of the wells after they were drilled in order to establish hydraulic connections between them. Well GPK4 had a relatively poor connection to the reservoir as shown by the comparatively ...Master Thesis -
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The formation of chlorinated organics during electrolytic urine treatment
(2012)This master thesis is part of the VUNA project which aims for nutrient recovery and treatment of urine in decentralized treatment facilities. Electrolysis is used to remove nitrogen through electrolytic ammonia oxidation. It is a promising treatment option because it is not susceptible to inflow variations. However, a disadvantage of electrolysis is that chlorinated organics, which are dangerous for environmental and human health, might ...Master Thesis -
Optical Flow PIV
(2013)A technique to analyze Particle Image Velocimetry (PIV) images with strong refractive distortion is presented. Based on a muti-level optical flow algorithm, the approach has been benchmarked with synthetically generated PIV images, and has been successfully applied to both experimental PIV and Laser Induced Fluorescence (LIF) images. To improve velocity field estimation, new symmetric spline and advection warping methods are proposed ...Master Thesis