Development of space proven technologies, fundamental research in microgravity and preparation future missions all benefit from next generation drop tower facilities like the Einstein-Elevator. The facility is being made available within a DFG core center Hannover.

Science Foundation (DFG). The authors thank Leonhard Knorr-Held and the two referees for valuable comments. 1

Abstract We explore background-free options to detect mid-infrared (MIR) electric transients. The MIR field and a near-infrared probe interact via sum- (SFG) difference-frequency generation (DFG) in an electro-optic crystal. An intuitive picture based on phasor representation rigorous numerical calculations are used for analysis. It turns out that separating photons generated either by SFG or D...

We study the integration and approximation problems for monotone or convex bounded functions that depend on d variables, where d can be arbitrarily large. We consider the worst case error for algorithms that use finitely many function values. We prove that these problems suffer from the curse of dimensionality. That is, one needs exponentially many (in d) function values to achieve an error ". ...

Many computation-intensive or recursive applications commonly found in digital signal processing and image processing applications can be represented by data-flow graphs (DFGs). In our previous work, we proposed a new technique, extended retiming, which can be combined with minimal unfolding to transform a DFG into one which is rate-optimal. The result, however, is a DFG with split nodes, a con...