A chest brace and method of using same that prevents the chest wall from buckling inwards during patient breathing by providing a distending force on the patient’s thorax. Upon zooming from the short focal length extremity to the long focal length extremity, a distance between the positive first lens group and the negative second lens group increases, a distance between the negative second lens group and the positive third lens group decreases, and a distance between the positive third lens group and the positive fourth lens group decreases. The autonomous vehicle or the access points transmit the network traffic information to a computer system that can generate a graphical user interface that represents the network traffic information for the inventory management system. The coding can determine a distance of a transition between a first color and a second color in the display file, and code that distance to form coded distance information and encrypt the coded distance information. The encoder introduces a global full search around a candidate from a coarser level, in case an initial local search fails. The information displayed is a function of the comparison.