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Adaptation of the spike-frequency response to constant stimulation, as observed on various timescales in many neurons, reflects high-pass filter properties of a neuron’s transfer function. Adaptation in general, however, is not sufficient to make a neuron’s response independent of the mean intensity of a sensory stimulus, since low frequency components of(More)
Male field crickets produce pure-tone calling songs to attract females. Receivers are expected to have evolved a "matched filter" in the form of a tuned sensitivity for this frequency. In addition, the peripheral directionality of field crickets is sharply tuned as a result of a pressure difference receiver. We studied both forms of tuning in the same(More)
Spike-frequency adaptation is a common feature of neural dynamics. Here we present a low-dimensional phenomenological model whose parameters can be easily determined from experimental data. We test the model on intracellular recordings from auditory receptor neurons of locusts and demonstrate that the temporal variation of discharge rate is predicted with(More)
Neural adaptation serves to adjust the sensory pathway to the current environment of an animal. While the effect and time course of adaptation can be observed directly within single cells, its underlying cause is a combination of many different mechanisms spread out along the sensory pathway. The present work has the objective to unite these different(More)
After the second place in RoboCup Rescue 2004, a new version of the mobile robot Kurt3D was developed in our groups during the last year [1]. The key innovation of this system lies in the capability for autonomous or operator assisted 6D SLAM (simultaneous localization and mapping) and 3D map generation of natural scenes. Hence, Kurt3D already meets the(More)
These students do their required practical studies at AIS. Abstract. A mobile robot named KURT3D was developed at the Fraunhofer Institute for Autonomous Intelligent Systems during the last three years. The key innovation of this system lies in the capability for autonomous or operator-assisted 6D SLAM (simultaneous localization and mapping) and 3D map(More)
Courtship songs are used by female Gryllus bimaculatus to assess the quality of their potential mating partner. Typically, a song consists of chirps composed of few pulses followed by a chirp pause (Figure 1A). In extensive behavioral experiments, phonotactic responses of female crickets were tested by varying song features such as duration of pulse,(More)
In conditions of low metabolic activity moth pupae of Attacus atlas show a tripha-sic, rhythmic pattern of CO 2 release (discontinuous gas exchange, DGC). The phases, closed, fluttering and open respectively, are labeled according to the behavior of the spiracles, which control gas exchange. However, a single spiracle only possesses two states, that is open(More)