In one embodiment, at least one of number of times a frame is paused by a plurality of users and attention-activity of the users for the frame is tracked for each frame of an asset. The system comprises a network services module, a digital signature system and an electronic fund transfer submission module. When the drive is started the disk begins to spin and an actuator moves the load beam to bring the slider over the surface of the disk. The feedstock and the milling media are disposed in the processing volume of the container. The collection devices utilized to collect exhaled breath condensate from both spontaneously breathing and mechanically ventilated subjects and the devices utilized to determine whether lipopolysaccharide is present in the collected exhaled breath condensate. X-ray detection sensitivity can be detected without mixing the test-piece in the actual examination subject article.