Frank Schreiber

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IMPORTANCE The applicability of β-amyloid peptide (Aβ) positron emission tomography (PET) as a biomarker in clinical settings to aid in selection of individuals at preclinical and prodromal Alzheimer disease (AD) will depend on the practicality of PET image analysis. In this context, visual-based Aβ PET assessment seems to be the most feasible approach. (More)
BACKGROUND AND PURPOSE The coincidence of hemodynamic and embolic findings in patients with stroke from large artery stenosis has suggested an interaction of both pathologies. This has emerged into the hypothesis of an impaired washout of emboli in the presence of hypoperfusion. We propose an additional link between both pathologies. SUMMARY OF CASE A(More)
An important aim of the current research effort in artificial intelligence and robotics is to achieve cooperative agent behavior for teams of robots in real-world scenarios. Especially in the RoboCup scenario , but also in other projects like Nexus, agents have to cooperate efficiently to reach certain goals. In the RoboCup project, cooperative team-play(More)
The intestinal microbiota features intricate metabolic interactions involving the breakdown and reuse of host- and diet-derived nutrients. The competition for these resources can limit pathogen growth. Nevertheless, some enteropathogenic bacteria can invade this niche through mechanisms that remain largely unclear. Using a mouse model for Salmonella(More)
OBJECTIVES Alterations of glutamic acid decarboxylase (GAD) play a crucial role in schizophrenic pathology. While GAD has been studied in several brain regions, its expression in the posterior hippocampus formation has not been investigated in schizophrenia. METHODS We studied the brains of 17 patients with chronic schizophrenia and 15 controls. Using the(More)
In this paper, the design for variable geometry truss manipulators, with 3-DOF octahedron-shaped modules and hydraulic actuation is introduced. The main features of the concept are the optimized multiple collocated spherical joints and a structure-integrated supply of the drive fluid for the hydraulic actuators. Based upon the known Spherical Joint(More)