Daniel Ritter

Learn More
BACKGROUND In industry and academic research, there is an increasing demand for flexible automated microfermentation platforms with advanced sensing technology. However, up to now, conventional platforms cannot generate continuous data in high-throughput cultivations, in particular for monitoring biomass and fluorescent proteins. Furthermore,(More)
The tumor site is a strong clinical factor in head and neck squamous cell carcinoma (HNSCC). To clarify the biologic and clinical role of p53 alterations in HNSCC, we have examined the prevalence and the nature of p53 alterations in a large cohort of tumors from the different sites. For immunohistochemical analysis of p53 protein expression, we introduced(More)
We present an algorithm for multi-physics simulation of charged particles in electrokinetic flows. It includes a coupled simulation of charged rigid particles in fluid flows in an electric field. The parallel simulation algorithm is implemented in the WALBERLA software framework. For solving the partial differential equation that models the electric(More)
The potential gastroprotection of polysaccharides (SP) isolated from maté (Ilex paraguariensis) leaves of different growth stages, under different sunlight conditions and of processing methods were evaluated. The SP consist of type I arabinogalactan (AG1) containing a (1→4)-linked β-Galp chain, with substituents of arabinosyl units at O-6. This(More)
In the field of molecular dynamics, Poisson’s equation with open boundary conditions plays a major role. One issue that comes up, when this equation is solved numerically, is the infinite size of the domain. This prevents a direct solution, so that other concepts have to be considered. Within the scope of this thesis, a method is discussed that uses(More)
Poisson’s equation on unbounded domains was solved with a hierarchical grid coarsening approach on the basis of Stephen F. McCormick’s Fast Adaptive Composite grid method. We were especially interested in the efficient interface treatment that is enabled by regular stencils. The error behavior of a second-order scheme was empirically analyzed for an(More)
The following document describes the progress made in dealing with Poisson’s equation on unbound domains. The main focus is placed on interface treatment in the tradition of Stephen McCormick’s Fast Adaptive Composite Grid method. The method itself is described in detail and numerical tests are performed. Results of these experiments are extensively shown(More)
  • 1