Abstract: In a cryptographically-segmented network, a server establishes a cryptographically-segmented communication channel for use by authorized endpoints in an operationally-deployed configuration. In response to a received endpoint-isolation command to isolate a first endpoint, the server de-authorizes the first endpoint from the channel of the operationally-deployed configuration. In response to the de-authorization, the server issues a configuration instruction to the first endpoint to join a first cryptographically-segmented isolation communication channel that is communicatively coupled with at least one monitoring endpoint configured to monitor operation of the first endpoint via the first cryptographically-segmented isolation communication channel.

Abstract: The invention enables accurate control of particle flow with regard to feeding abrasive material to a surface. The unit does not employ a vibrator and may be used to remove undesired material from a surface. A particular application is in a dental air abrasion unit for both cleaning and cutting tooth surfaces. When used in an air abrasion dental instrument, the abrasive material is stored in a container which is separated from a mixing chamber by an orifice member. The flow of particles is electronically controlled by the differential in pressure in the container section above the particle level and the pressure below an orifice member in a mixing chamber. The resulting particle flow to the surface is substantially linear and less erratic than that of prior air abrasion instruments.

Abstract: A method and apparatus for counting the exact number of electrical circuit components carried by a length of component dispensing tape is disclosed. In the preferred embodiment, the invention uses optical detectors to detect the transmission of light through tape index holes and component carrier compartment holes and variously to increment or inhibit operation of a counter accordingly. In one form of the invention, the circuitry is adapted to detect automatically whether the tape is optically transmissive or opaque and to modify the counting scheme accordingly.