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Free Surface Water Flows – Modeling, Simulation and Control
(2017)Upstream and downstream channels are the key subsystems for the design of level/ flow control loops in run-of-river hydropower plants. Their dynamic response is notoriously complex, exhibiting low frequency resonance with weak damping, travelling waves, both sub- and supercritical flow, hydraulic jumps, etc. Part one of this report provides mathematical models derived from the basic physical conservation laws of mass and momentum (Reynolds ...Report -
The Swiss Glaciers 2005/06 and 2006/07
(2011)The Swiss Glaciers. Glaciological ReportDuring the 127th and 128th year under review by the Cryospheric Commission, Swiss glaciers continued to lose both length and mass. The dominant weather conditions of this measurement period and the effects of global warming left clear traces. In autumn 2006, a length variation was determined for 92 of the 98 glaciers observed, while one year later such a result was obtained for 91 of 95 glaciers. In the two observation periods, 2005/2006 ...Report -
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Ratio Buckets: A Numeric Method for k-fold Tight Differential Privacy
(2017)Cryptology ePrint ArchivePrivacy guarantees of a privacy-enhancing system have to be robust against thousands of observations for many realistic application scenarios, such as anonymous communication systems, privacy-enhancing database queries, or privacy-enhancing machine-learning methods. The notion of r-fold Approximate Differential Privacy (ADP) offers a framework with clear privacy bounds and with composition theorems that capture how the ADP bounds evolve ...Report