Abstract: A wireless sensor device can include a primary body, a primary processor mounted to the primary body, a first plurality of sockets mounted to the primary body and in electrical communication with the primary processor, a first transducer mounted to the primary body, a secondary body mounted to the primary body through a first socket of the first plurality of sockets, a secondary processor mounted to the secondary body, a second plurality of sockets mounted to the secondary body and disposed in electrical communication with the secondary processor, a tertiary body mounted to the secondary body, a tertiary transducer mounted to the tertiary body and disposed in electrical communication with the secondary processor, and a first wireless transceiver disposed in electrical communication with and selectively controlled by the primary processor.

Abstract: A wireless sensor device can include a primary body, a primary processor mounted to the primary body, a first plurality of sockets mounted to the primary body and in electrical communication with the primary processor, a first transducer mounted to the primary body, a secondary body mounted to the primary body through a first socket of the first plurality of sockets, a secondary processor mounted to the secondary body, a second plurality of sockets mounted to the secondary body and disposed in electrical communication with the secondary processor, a tertiary body mounted to the secondary body, a tertiary transducer mounted to the tertiary body and disposed in electrical communication with the secondary processor, and a first wireless transceiver disposed in electrical communication with and selectively controlled by the primary processor.

Abstract: A lightweight, optimally efficient, easily serviced, piston-in-sleeve high pressure accumulator is provided. The accumulator includes one or more cylindrical composite pressure vessel separate end cap manifolds. A piston slidably disposed in a thin impermeable internal sleeve in the accumulator separates two chambers, one adapted for containing a working fluid and the other adapted for containing gas under pressure. Gas is provided in a volume between the impermeable internal sleeve and the composite pressure vessel wall. Additional gas is optionally provided in gas cylinders. Further components are provided for withstanding harmful effects of radial flexing of the composite vessel wall under high pressures, and from stresses present in use in mobile applications such as with a hydraulic power system for a hydraulic hybrid motor vehicle.

Abstract: A lightweight, optimally efficient, easily serviced, piston-in-sleeve high pressure accumulator is provided. The accumulator includes one or more cylindrical composite pressure vessel separate end cap manifolds. A piston slidably disposed in a thin impermeable internal sleeve in the accumulator separates two chambers, one adapted for containing a working fluid and the other adapted for containing gas under pressure. Gas is provided in a volume between the impermeable internal sleeve and the composite pressure vessel wall. Additional gas is optionally provided in gas cylinders. Further components are provided for withstanding harmful effects of radial flexing of the composite vessel wall under high pressures, and from stresses present in use in mobile applications such as with a hydraulic power system for a hydraulic hybrid motor vehicle.

Abstract: A virtual-reality system provides a full-body, digitally programmed, kinesthetic display in the form of a foot-haptic system incorporating a pair of footpads, one associated with each foot of a user, and a multi-axis electromechanical interface responsive to user position and orientation. A computer, in communication with the electromechanical interface, permits the user to interact with a virtual terrain, vertical features, or other users. In a preferred physical realization, the system includes three major components: a locomotion simulator, a ground plane 104, and a vertical feature emulator. A head-mounted display provides all visual clues. The system may be operated in a first mode of operation, wherein the user's feet and the footpads remain in constant contact with each other, or an alternative mode of operation, wherein the user makes and breaks contact with the footpads in a cyclical manner.