Abstract: A system is provided for testing and enhancing the alertness of operators who monitor video surveillance imagery. Alertness is tested by displaying any of a variety of visual elements on top of or near the video imagery, and receiving input from human operators in response to the visual elements, via one or more input devices. The system further allows for economic management of human operators by transmitting imagery from many video sources to any number of operators. Video feeds are automatically switched, via software, away from an operator who wishes to take a break or has poor alertness. In this fashion, the system maximizes operator vigilance while also maximizing workflow for all available operators.

Abstract: A system is provided for testing and enhancing the alertness of operators who monitor video surveillance imagery. Alertness is tested by displaying any of a variety of visual elements on top of or near the video imagery, and receiving input from human operators in response to the visual elements, via one or more input devices. The system further allows for economic management of human operators by transmitting imagery from many video sources to any number of operators. Video feeds are automatically switched, via software, away from an operator who wishes to take a break or has poor alertness. In this fashion, the system maximizes operator vigilance while also maximizing workflow for all available operators.

Abstract: A magnetically levitated blood pump having a single inlet for accepting blood and tangential volute. The pump includes an impeller formed on a hub that is suspended radially by permanent magnet bearings and axially adjusted via and thrust coil. The hub is rotated by an axial gap permanent magnet DC motor having motor magnets mounted on the hub adjacent to the impeller, a stator formed in the area opposite to the motor magnets, and motor coils formed on the stator. The axial air gap of the motor is formed in the impeller blade path. The motor may have two separate stator members. The current in the thrust coil is controlled by feedback of the impeller axial position measured by sensors. The pump components are compactly configured within a housing.