A method for identifying a selective persistent Na+ channel blocker by measuring the ability of the blocker to reduce or inhibit a persistent Na+ current to a greater degree than a transient Na+ current. The propulsion device includes a particulate matter receptacle attached to a supporting means, the supporting means being store energy such that when the card is opened the particulate matter is propelled from the card. In this manner, the effect of the body transconductance, at high frequencies, becomes a function of the ratio of the well-to-substrate capacitance of the MOSFET to the sum of the well-to-substrate capacitance and the source-to-body capacitance of the transistor. Also included is a turbine exhaust path configured to route an exhaust flow, wherein the first tube and the second tube are disposed along the turbine exhaust path, wherein the oil is cooled upon passage of the exhaust flow over the first tube and the second tube. The storage router then allows access from the workstations to the SCSI storage devices using native low level, block protocol in accordance with the mapping and the access controls.