Abstract: The invention relates to an optoelectronic security system comprising a plurality of light transmitters in a light grid arrangement for the transmission of light signals into a monitored zone, at least one spatially resolving light reception unit for the reception of the light signals transmitted by the light transmitters and a read-out circuit for the reading out of the signals of the at least one light reception unit. In accordance with the invention, the optoelectronic security system has an evaluation device which is configured such that it can split the surface of the at least one light reception unit into at least two processing regions in dependence on a predetermined selection criterion and can further process the signals of the at least two processing regions differently.

Abstract: A device and a method for an authorization interrogation in a motor vehicle uses a transponder exchanges data with an antenna array within the framework of an authorization interrogation. During an external space interrogation, the antenna array is controlled using a current for the external space interrogation and, during an interior space interrogation, using a current for the interior space interrogation.

Abstract: The invention relates to a new process for graphic visualization and diagnosis of thrombi as well as the use of particle suspensions for the production of contrast media for the visualization of thrombi with use of nuclear spin tomography.

Abstract: The invention relates to a new process for graphic visualization and diagnosis of thrombi as well as the use of particle suspensions for the production of contrast media for the visualization of thrombi with use of nuclear spin tomography.