Multirate ideas for numerical time integration are explained concerning multirated extrapolation and stepsizing. Later parts of the report focus on Rosenbrock-Wanner (ROW) schemes, since those seemed to be most promising for the needs in circuit simulation: The ROW formula applicable to circuit di erential algebraic equations are introduced and changes within the analog circuit simulator Pstar ...

Underwater sensor networks (UWSN) are considered to be feasible and suitable for several applications. However, the characteristics of the acoustic channel must be taken into account on the evaluation of the application feasibility. The acoustic channel imposes severe limitations to the communication, such as low bandwidth, low data rates and short practical transmission ranges. Applications wi...

Search using subgoal graphs is a recent preprocessing-based path-planning algorithm that can find shortest paths on 8neighbor grids several orders of magnitude faster than A*, while requiring little preprocessing time and memory overhead. In this paper, we first generalize the ideas behind subgoal graphs to a framework that can be specialized to different types of environments (represented as w...

Functional magnetic resonance imaging (fMRI) reveals changes in blood oxygen level-dependent (BOLD) signal after considerable processing. This paper describes the implementation and testing of an fMRI phantom where electric current applied to a thin wire within a proton-rich medium substituted BOLD distortion of the magnetic field; the scanner detects these two distortions as practically identi...