Abstract: A wheelchair including a wheelchair propulsion system adapted to independently operate each of a pair of drive wheels by corresponding independent manual rotation of a pair of cranks.

Abstract: A flow cytometry system (1) for sorting haploid cells, specifically irradiatable sperm cells, with an intermittingly punctuated radiation emitter (56). Embodiments include a beam manipulator (21) and even split radiation beams directed to multiple nozzles (5). Differentiation of sperm characteristics with increased resolution may efficiently allow differentiated sperm cells to be separated higher speeds and even into subpopulations having higher purity.

Abstract: A method and monitoring unit for recording the status of a railroad vehicle prior to a potential accident. In a monitoring unit mounted in or on a railroad vehicle, such as a locomotive, a video camera is provided to continuously view a scene that the railroad vehicle approaches. The monitoring unit continuously monitors the status of an emergency brake of the railroad vehicle and the status of a horn of the railroad vehicle. Video signals from the video camera are continuously stored. A control unit in the monitoring unit detects the application of both the emergency brake and blast of the horn within a predetermined time window. Video signals from the video camera are captured for a predetermined period of time after detecting that the application of the emergency brake and horn blast within the predetermined time window.