Global well-posedness for passively transported nonlinear moisture dynamics with phase changes

We study a moisture model for warm clouds that has been used by Klein and Majda as a basis for multiscale asymptotic expansions for deep convective phenomena. These moisture balance equations correspond to a bulk microphysics closure in the spirit of Kessler and of Grabowski and Smolarkiewicz, in which water is present in the gaseous state as water vapor and in the liquid phase as cloud water and rain water. It thereby contains closures for the phase changes condensation and evaporation, as well as the processes of autoconversion of cloud water into rainwater and the collection of cloud water by the falling rain droplets. Phase changes are associated with enormous amounts of latent heat and therefore provide a strong coupling to the thermodynamic equation. In this work we assume the velocity field to be given and prove rigorously the global existence and uniqueness of uniformly bounded solutions of the moisture model with viscosity, diffusion and heat conduction. To guarantee local well-posedness we first need to establish local existence results for linear parabolic equations, subject to the Robin boundary conditions on the cylindric type of domains under consideration. We then derive a priori estimates, for proving the maximum principle, using the Stampacchia method, as well as the iterative method by Alikakos to obtain uniform boundedness. The evaporation term is of power law type, with an exponent in general less or equal to one and therefore making the proof of uniqueness more challenging. However, these difficulties can be circumvented by introducing new unknowns, which satisfy the required cancellation and monotonicity properties in the source terms

An integrated risk estimation methodology: Ship specific incident type risk

Shipping activity has increased worldwide, including parts of Australia, and maritime administrations are trying to gain a better understanding of total risk exposure in order to mitigate risk. Total risk exposure integrates risk at the individual ship level, risk due to vessel traffic densities, physical environmental criteria, and environmental sensitivities. A comprehensive and robust risk exposure metric can be beneficial to maritime administrations to enhance mitigation of potential harm and reduce vulnerability to the marine environment as well as to safeguard lives and property. This report outlines an integrated methodology to estimate total risk exposure, with specific attention for the ship specific risk for different types of incident. Some related application aspects of the models are discussed

eGovernment development at the local level

Session 5: Knowledge societ

Kurze Geschichte des Universitätsarchivs Münster:Vortrag anlässlich des Festaktes zum 100-jährigen Jubiläum des Universitätsarchivs Münster am 5. September 2012

Der Vortrag behandelt im Überblick die Geschichte des Universitätsarchivs Münster von seiner Entstehung durch Senatsbeschluss vom 12. Juni 1912 bis in die Gegenwart. Die verschiedenen  Universitätsarchivare und Geschäftsführer sowie ihr Wirken für das Archiv werden vorgestellt. Neben der personellen Ausstattung ist die räumliche Unterbringung, nicht zuletzt vor dem Hintergrund der Kriegseinwirkungen, ein wichtiger Gesichtspunkt. Daneben werden die Bestandsgröße, die rechtlichen Grundlagen, die mit dem Archiv befassten Gremien, die Beziehungen zu den anderen Universitätseinrichtungen und den übrigen Archiven Münsters sowie die derzeitige Situation und aktuelle Entwicklungen thematisiert