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In this paper we describe a novel approach to autonomous dirt road following. The algorithm is able to recognize highly curved roads in cluttered color images quite often appearing in offroad scenarios. To cope with large curvatures we apply gaze control and model the road using two different clothoid segments. A Particle Filter incorporating edge and color(More)
Dendritic cells (DCs) are critical in both initiating adaptive immune responses and maintaining tolerance to self antigens. These apparently contradictory roles have been suggested to depend on different subsets of DCs that arise from either myeloid or lymphoid hematopoietic origins, respectively. Although DC expression of CD8alpha is attributed to a(More)
In this paper we describe a novel approach to model-based monocular vehicle tracking out of a moving vehicle using active vision. The designed algorithm can cope with cluttered color images, complex lighting conditions as well as partial occlusion of the leading vehicle and is able to detect and track a vehicle even within unstructured offroad environments.(More)
The ability to perceive a robot's local environment is one of the main challenges in the development of mobile ground robots. Here, we present a robust model-based approach for detection and tracking of road networks in rural terrain. To get a rich environment representation, we fuse the complementary data provided by a 3D LIDAR and an active camera(More)
BACKGROUND The evaluation of patients with abdominal discomfort is challenging and patient selection for endoscopy based on symptoms is not reliable. We evaluated the diagnostic value of fecal calprotectin in patients with abdominal discomfort. METHODS In an observational study, 575 consecutive patients with abdominal discomfort referred for endoscopy to(More)
BACKGROUND European Panel on the Appropriateness of Gastrointestinal Endoscopy (EPAGE) criteria have been developed to increase diagnostic yield, but their predictive value is limited. We investigated the incremental diagnostic value of faecal calprotectin to EPAGE criteria. METHODS In a post-hoc analysis of a prospective study, EPAGE criteria were(More)
This paper gives an overview of the autonomous off-road navigation approach developed for the ground robot vehicle MuCAR-3. It integrates our approaches to goal-directed and GIS-data supported autonomous navigation, autonomous person and vehicle following and shuttling on a taught track into a single system. The perceptual prerequisites necessary to realize(More)
We present new experimental evidence on heterogeneity in the formation of inflation expectations and relate the variation to economic literacy and demographics. The experimental design allows us to investigate two channels through which expectations-formation may vary across individuals: (1) the choice of information and (2) the use of given information.(More)
Environment sensors with a narrow vertical field of view often fail to detect obstacles with a small vertical extent from close range. Because an inverse beam sensor model infers free space when there was no measurement, those obstacles are deleted from an occupancy grid eventhough they have been observed in past measurements. This is extremely critical if(More)