The landforms of northern Gale crater on Mars expose thick sequences of sedimentary rocks. Based on images obtained by the Curiosity rover, we interpret these outcrops as evidence for past fluvial, deltaic, and lacustrine environments. Degradation of the crater wall and rim probably supplied these sediments, which advanced inward from the wall, infilling… (More)
A detailed mathematical proof is given that the energy spectrum of a quantum particle in multi-dimensional Euclidean space under the influence of certain random potentials is pure point at sufficiently low energies. The results apply in particular to an important class of Gaussian random potentials, which are homogeneous with respect to Euclidean… (More)
Load commutated inverters (LCI) cover a large variety of industry applications in a power range up to 100 MW. The paper discusses realized applications in power generation, oil and gas, marine drives, and metal industry. A new LCI family with a high grade of modularity allows covering all these applications with a minimum of different parts. The heart of… (More)
The functional–analytic versus the functional–integral approach to quantum Hamiltonians: The one–dimensional hydrogen atom * Abstract The capabilities of the functional–analytic and of the functional–integral approach for the construction of the Hamiltonian as a self–adjoint operator on Hilbert space are compared in the context of non–relativistic quantum… (More)
Virtualization techniques are getting more and more popular. They allow to run multiple virtual servers on a single physical machine. But in case of a hardware outage, tens of virtual servers are down. This paper gives some insight how to prevent this situation. " Problems of virtualization " discusses why it is necessary to think about clustering in… (More)
Schrödinger operators with certain Gaussian random potentials in multi-dimensional Euclidean space possess almost surely an absolutely continuous integrated density of states and no absolutely continuous spectrum at sufficiently low energies.
Alle Rechte vorbehalten ii Erklärung Hiermit erkläre ich an Eides statt, dass ich die vorliegende Arbeit selbst-ständig und ohne fremde Hilfe verfasst, andere als die angegebenen Quellen und Hilfsmittel nicht benutzt und die aus anderen Quellen entnommenen Stellen als solche gekennzeichnet habe. Contents Erklärung iii Preface viii Kurzfassung ix Abstract x… (More)
Exact results are derived on the averaged dynamics of a class of random quantum-dynamical systems in continuous space. Each member of the class is characterized by a Hamiltonian which is the sum of two parts. While one part is deterministic, time-independent and quadratic, the Weyl-Wigner symbol of the other part is a homogeneous Gaussian random field which… (More)