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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)
BACKGROUND 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(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)
In many communication systems, information is encoded in the temporal pattern of signals. For rhythmic signals that carry information in speciic frequency bands, a neuronal system may proot from tuning its inherent ltering properties towards a peak sensitivity in the respective frequency range. The cricket Gryllus bimaculatus is a simple biological system(More)