The present invention provides an intra-oral anchorage which comprises a flexible belt that extends around and between the teeth of a patient. A composition includes an amorphous matrix forming element ; at least one transition metal element; and at least one crystallizing agent that is insoluble in the resulting amorphous matrix. When a scratch-forming tool, a diamond tip having a tip diameter of 15 \u03bcm, is pressed onto the liquid-repellent film with a load of 0. Both liquid and gas flow through the fluid outlet between the separator and the reservoir. Further, a geographic location having an aggregate probabilistic utility score satisfying preselected criteria may be selected and transmitted to a second server so that geographically-targeted internet-based services can be provided.