Axel Schild

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It is implicit in many cone-specific ERG studies that the amplitude is proportional to the numbers of cones stimulated. The objective of these experiments was to test this idea by comparing ERGs obtained from different areas of the retina with histological data on cone-density distributions. The histology (Curcio et al., 1990) shows that the cumulative(More)
This paper presents a novel optimal adaptive feedback control concept for nonlinear switched autonomous systems. Our proposed controller implements a closed-loop switching law, which is represented by a parametrized switching plane in the state space. During the plant operation, the plane parameters are incrementally adapted to state measurements in real(More)
Discretely controlled continuous systems (DCCS) represent an important class of hybrid systems, in which a continuous process is regulated by a discrete controller. The paper introduces a novel model-based design procedure for periodically operated DCCS with the objective to produce a periodic stationary operation. The method exploits an equivalence to(More)
A transimpedance amplifier array for 12 parallel optical-fiber channels each operating at 10 Gb/s is presented. It stands out for the following features: high gain (transimpedance 25 k/spl Omega/ in the limiting mode), high input sensitivity and wide input dynamic range (input current swing from 20 to 240 /spl mu/A/sub p-p/), constant output voltage swing(More)
ORBKIT is a toolbox for postprocessing electronic structure calculations based on a highly modular and portable Python architecture. The program allows computing a multitude of electronic properties of molecular systems on arbitrary spatial grids from the basis set representation of its electronic wavefunction, as well as several grid-independent(More)