Methods and apparatus, including computer program products, implementing and using techniques for managing bookmarks associated with web pages. The devices can be used in vascular channels, urinary tracts, biliary ducts and the like, and filter emboli and other debris generated at a treatment site. The thermal sensing device may be provided in the form of a number of series-connected polysilicon diodes positioned adjacent to the power device such that the operating temperature of the thermal sensing device is near that of the power device. Frame importance and appropriate transmission fidelity is predicted based on prosodic features and models of dialog dynamics.