The present invention aims to provide a system that allows multiple users operating a PDA to access the Internet or the World Wide Web, and to be able to view and interact with these images remotely on a display screen. The method comprises traversing a netlist graph in a depth-first manner. Further, the method includes ascertaining whether the first hash generated matches any long loop entries in a storage and, if so calculating a second hash for the long loop. Devices that report the same LAN MAC address of the router through which they connect to the wide area network are determined to be from the same \u201chousehold\u201d, i. The distances between individual image partial areas can be then be determined by evaluating the progressively detected positions of the ultrasound transducer which are then assigned to the individual image partial areas. In an alternative embodiment, a ring having a plurality of nipples and adhesive to secure the ring to the patient’s skin surrounding a surgical site is provided to hold a plurality of retractors.