A method of improving the control performance of a traction slip control system so that faulty control activations of the TCS control system are prevented in critical situations such as driving downhill. The rotatable screw includes a screw body, at least one main screw blade surrounding the screw body and forming a plurality of screw flights. The display device is arranged to display the preview image. Embodiments of the invention are applicable to the diagnosis, assessment, or treatment of cardiovascular diseases. In one embodiment, upon receiving a device command from a first host, a device targeted by the device command is reserved for the first host and a reservation time period for expiration of the reservation status is set.