Abstract: A drilling tool for use in machining a conductive work piece is provided. The tool includes a body portion, a forward electrode coupled to the body portion, and at least one side electrode coupled to the body portion. When electric current is supplied to the forward electrode and the at least one side electrode, material adjacent to the forward electrode and the at least one side electrode is removed from the conductive work piece. Further, the forward electrode and the at least one side electrode are selectively operable to form a bore hole having a variable geometry that extends through the conductive work piece when the material is removed therefrom.

Abstract: An electrochemical machining system for machining a conductive work piece is provided. The system includes a drilling tool configured to remove material from the conductive work piece. The drilling tool is configured to advance within the conductive work piece along a tool path to form a bore hole having a variable geometry that extends through the conductive work piece when the material is removed therefrom. The system further includes an inspection device configured to determine a position of the drilling tool along the tool path, and a controller configured to communicate with the inspection device. The controller is further configured to compare the tool path to a nominal tool path, and determine a position error of said drilling tool, the position error defined by a difference between the tool path and the nominal tool path.

Abstract: A computer-implemented method for forming a three-dimensional workpiece from a block of material using a fluid jet cutting device is implemented by a fabrication system. The method includes receiving an indication of the geometry of the workpiece and generating a three-dimensional tool path to control a cutting head to form the workpiece. Generating the tool path includes receiving an indication of a desired cutting surface on the workpiece, determining a length of the cutting surface, and designating a plurality of waypoints along an edge of the cutting surface. Generating the tool path also includes determining at least one geometric parameter of the cutting surface at each waypoint of the plurality of waypoints, and calculating a speed of the cutting head at each waypoint of the plurality of waypoints based on the determined geometric parameter such that the speed of the cutting head varies along the cutting surface length.

Abstract: A system and method including: receiving, from a client device, an authorization request originating from an authorization module of an application executing on the client device, where the authorization request includes an identifier identifying the client device; causing transmission, based on the identifier, of a verification message to the client device, where the verification message includes a verification code; receiving a confirmation of the verification code from the authorization module of the application executing on the client device; authenticating the application based on the receiving the confirmation of the verification code; determining that the client device identified by the identifier corresponds to a user account including secure user data associated with a user; and transmitting a unique token verifying that the application is authorized to sign into the user account, where: the unique token uniquely identifies the user account to the application, and the secure user data is not shared w

Abstract: A cranial perforator with an inner drill and an outer drill that surrounds the inner drill. Both drills are rotated by a head. Once the inner drill penetrates the bone, the inner drill moves against the outer drill. This movement causes the inner drill to disengage from the perforator head. The disengagement of the inner drill from the perforator head serves to stop the rotation of both drills.

Abstract: Methods and apparatus for peer to peer network communication. In one implementation, a method of communicating between a first client system and a second client system includes: discovering first address information for a first client system connected to a first network address translation device; sharing the first address information with a second client system; receiving second address information for the second client system; and establishing communication between the first client system and the second client system using the second address information.

Abstract: A tool arrangement including a powered surgical handpiece and an attachment for use therewith which supports a surgical cutting accessory. The attachment includes an arrangement which automatically axially positions the cutting accessory relative to the attachment upon coupling the attachment to the handpiece. A sleeve arrangement is also provided in the attachment which protects bearings, which are provided for rotatably supporting the cutting accessory, from contamination.