Provided is an exercise device including a planar support surface and a rolling joint which is configured to enable a 360\xb0 range of motion for the exercise device. Each character sequence group found in the image is converted to machine readable format by an optical character recognition engine and compared with a database having a plurality of license plate numbers and associated records. Patient airway resistance is calculated combining these measurements with flow measurement. The keep-alive messages are configured to maintain connectivity and presence of the AOAC application with the remote application server while the host system is in the low-power state. The probe is designed so that when in use, substantially only the tube is located inside the reactor. The second opening exposes the area where a conductive wire is desired.