PICA probe system methods and apparatus are described, including methods and apparatus for calibrating an event timer having a coarse measurement capability in which time intervals defined by clock boundaries are counted and a fine measurement capability in which time between boundaries is interpolated using a voltage ramp. In one aspect of the invention, a method for making porous low-k films is disclosed. The NMS identifies each device available in the network with a message digest. Such an inventive method as now proposed thus provides a bacterial cellulose-containing formulation that exhibits not only properties that are as effective as those for previous bacterial celluloses, but, in some ways, improvements to such previous types. It has various end cap options such as doors, windows, or solid panels, as a user dictates. In one example an agent or intermediary acts between the first party and the second party.