Nanotube-based logic circuitry is disclosed. The system sends the scheduling value from the downstream queue to an upstream queue and schedules dequeuing of one or more data units, destined for the downstream queue, from the upstream queue based on the scheduling value. Then, a second satellite to be searched is selected according to the searching result for the first satellite and respective interrelationships between the first satellite and the other satellites. The reference circuit generates a reference signal having a frequency Fref. By pulling the tubular frame proximally, the hooks pass into surrounding tissue so that the fixation band and prosthetic valve are fixed against proximal movement. The hydraulic circuit may further have a controller configured to transmit a fluid signal to cause the fluidic control to request a maximum flow of pressurized fluid, and transmit an electronic signal requesting a flow smaller than the maximum flow, which causes the electronic displacement control to vary the flow of pressurized fluid.