Jens Wettach

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We reported previously that cell-free transcription in the Archaea Methanococcus and Pyrococcus depends upon two archaeal transcription factors, archaeal transcription factor A (aTFA) and archaeal transcription factor B (aTFB). In the genome of Pyrococcus genes encoding putative homologues of eucaryal transcription factors TATA-binding protein (TBP) and(More)
TATA boxes are common structural features of eucaryal class II and archaeal promoters. In addition, a gene encoding a polypeptide with sequence similarity to eucaryal TATA-binding protein (TBP) has recently been detected in Archaea, but its relationship to the archaeal transcription factors A (aTFA) and B (aTFB) was unclear. Here, we demonstrate that yeast(More)
Besides safe motion control the gain of environmental knowledge is a key for a reliable home or office service robot. When being set into a completely unknown environment the robot has to be able to derive a certain abstract internal representation of this world without any user interaction. This knowledge enables the robot to know how to get from its(More)
The need for robust indoor localisation for all types of entities has been under continuous research by the ubiquitous community. Intelligent environments have to be supported with contextual information in order to facilitate intelligent behaviour. These contextual information include the location of humans and objects within the particular environment.(More)
A highly flexible framework for visualization and sensor simulation in three-dimensional environments is presented. By allowing the insertion of freely programmable elements for online scene modification, a programmer can customize the framework to fulfill the exact simulation or visualization needs of an application of interest. Furthermore, the framework(More)
This paper describes the thermodynamical model of a vacuum system for a climbing robot. Based on this model a simulation system is described, which is used to evaluate the influence of leakage situations on the adhesion system and to test control approaches. As a validation of the simulation parameters and the adhesion strategy a test platform was(More)
This paper discusses the simulation of vehicle kinematics with SimVis3D and the Newton Game Dynamics Engine. As running example a Pioneer like robot is used. First its differential drive is simulated manually, without physical effects. Then the dynamics engine is applied to simulate this drive mechanism based on rolling friction between wheels and ground.(More)