Abstract: A management server measures network activity of user devices to determine activities of the users associated with each user device. The management server generates digital model personas corresponding to the users based on one or more activities of the user. The management server clusters the digital model personas to generate user groups based on similar activities, and compares a first digital model persona from a first user with at least one second digital model persona.

Abstract: A network management system tests the availability of a network resource before a user performs a task with the network resource. The system measures network activity of a user performing one or more tasks. The network activity includes communication between a user device of the user and each network resource associated with a corresponding task performed by the user. The system also generates a digital model persona of the user based on the tasks performed by the user, and determines a schedule of the tasks performed the user. Each particular task is associated with a corresponding execution time for the user. The system further configures the digital model persona to test the network resource associated with each corresponding task at a testing time that is a predetermined length of time prior to the execution time for the user.

Abstract: A rail heating head includes an enclosure and an induction coil. The induction coil is positioned within the enclosure. When in use, the enclosure is positioned adjacent a lateral portion of a train track rail. To be positioned adjacent to the head, the web, and the foot of the train track rail, a rail-bracing wall of the enclosure has a convex exterior surface and a concave interior surface. The induction coil has a concave shape and is pressed against the concave interior surface. Thus, the induction coil can induce eddy current magnetic fields in the head, the web, and the foot maximizing surface area. The larger surface area results in molecules in a large area being activated and leads to more heat. An eddy current deflecting magnetic shield further directs magnetic fields towards the train track rail.

Abstract: An electric guitar pickup system is provided to generate a plurality of selectable desired Gibson and Fender tonality sounds from a single guitar. The pickup system includes a bridge pickup unit, a neck pickup unit, and a multiple position tonality select switch for selectively connecting the bridge pickup unit and the neck pickup unit in a plurality of desired pickup combinations, thereby selecting from a plurality of desired Fender and Gibson tonality signals. The bridge pickup unit includes a dual coil flat humbucker pickup to produce Gibson tonalities and further includes a dual coil bridge stacked humbucker pickup to produce Fender tonalities. The neck pickup unit similarly includes a dual coil flat humbucker pickup together with a dual coil neck stacked humbucker pickup to produce both Gibson and Fender tonalities.