Abstract: A linear actuator assembly that can include a drive shaft, and a piston, where rotation of the drive shaft extends or retracts the piston at a speed that automatically changes based on an opposing force applied to the piston. A system that can include a piece of rig equipment configured to engage an object, with one or more linear actuator assemblies incorporated into the piece of rig equipment, where the linear actuator assemblies selectively engage the object and each of the linear actuator assemblies can include a drive shaft, and a piston, and where rotation of the drive shaft extends or retracts the piston at a speed that automatically changes based on an opposing force applied to the piston.

Abstract: A method for discovering a network among a plurality of mobile nodes, which includes: a first mobile node periodically transmitting a first signal including an invitation token including data relating to an identity of the node which transmits the token; a second mobile node detecting the first signal; transmitting a second signal including at least one acknowledgement of the invitation token; creating a radio bubble, the communications between the nodes of the radio bubble being coordinated by transmitting a speech token between the nodes; and creating an IP sub-network between the nodes of the radio bubble, each node including an IP address.

Abstract: A method for discovering a network among a plurality of mobile nodes, which includes: a first mobile node periodically transmitting a first signal including an invitation token including data relating to an identity of the node which transmits the token; a second mobile node detecting the first signal; transmitting a second signal including at least one acknowledgement of the invitation token; creating a radio bubble, the communications between the nodes of the radio bubble being coordinated by transmitting a speech token between the nodes; and creating an IP sub-network between the nodes of the radio bubble, each node including an IP address.