Abstract: An engine system comprising a secondary fuel source for providing a secondary fuel, a metering valve for delivering the secondary fuel at a substantially pre-determined rate, an air intake, and an internal combustion engine. The metering valve comprises a valve body and a selectively-adjustable static valve mechanism. The valve body is provided with a fuel inlet in fluid communication with the secondary fuel source to receive the secondary fuel from the secondary fuel source, a fuel outlet, and a fuel passage between the fuel inlet and the fuel outlet. The selectively-adjustable static valve mechanism is disposed within the fuel passage of the valve body. The air intake is in fluid communication with the fuel outlet of the metering valve to receive the secondary fuel from the metering valve to permit the secondary fuel to mix with air.

Abstract: A method for assessing displacement of the talus relative to an axis of the foot and lower leg, which includes marking the anatomy of a test subject to enable tracking of the movement of the talus relative to the axis, and aligning the foot in a first position, and observing the displacement of the talus as indicated by the marking relative to the first position while allowing a displacement of the rear foot bone complex. Another embodiment includes a system for assessing pronation in a foot.

Abstract: A method for assessing displacement of the talus relative to an axis of the foot and lower leg, which includes marking the anatomy of a test subject to enable tracking of the movement of the talus relative to the axis, and aligning the foot in a first position, and observing the displacement of the talus as indicated by the marking relative to the first position while allowing a displacement of the rear foot bone complex. Another embodiment includes a system for assessing pronation in a foot.

Abstract: An engine system comprising a secondary fuel source for providing a secondary fuel, a metering valve for delivering the secondary fuel at a substantially pre-determined rate, an air intake, and an internal combustion engine. The metering valve comprises a valve body and a selectively-adjustable static valve mechanism. The valve body is provided with a fuel inlet in fluid communication with the secondary fuel source to receive the secondary fuel from the secondary fuel source, a fuel outlet, and a fuel passage between the fuel inlet and the fuel outlet. The selectively-adjustable static valve mechanism is disposed within the fuel passage of the valve body. The air intake is in fluid communication with the fuel outlet of the metering valve to receive the secondary fuel from the metering valve to permit the secondary fuel to mix with air.

Abstract: An article of footwear is disclosed having an upper, a foot-supporting member, and a sole structure. The foot-supporting member includes a heel region located at a greater elevation than a forefoot region, thereby defining a recess under the heel region. The sole structure includes a midsole that forms a protrusion on the interior of the footwear. The protrusion mates with the recess to provide support for the heel region. The foot-supporting member may also incorporate pronation control characteristics, including a downward cant from a medial to a lateral side of the foot-supporting member and a region of reduced support generally underlying the first metatarsal. To further reduce the rate of pronation, the sole structure includes a region in the rear-lateral corner that is more compressible than other areas of the sole structure.

Abstract: The present invention is a device and method of assessing the amount of pronation of a foot. The device includes a marker applied to the talar-head region of the foot. As the foot displaces from a first, subtalar-joint-neutral position to a second, relaxed position, corresponding movement of the marker is observed. The amount of movement in the marker relates to the amount of pronation of the foot. An optional template aids observation of this movement. The method assesses pronation by observing the talar-head displace as the foot transitions from a subtalar-joint-neutral position to a relaxed position. Optionally, the method includes providing a marker and a template to aid observation.

Abstract: An article of footwear is disclosed having an upper, a foot-supporting member, and a sole structure. The foot-supporting member includes a heel region located at a greater elevation than a forefoot region, thereby defining a recess under the heel region. The sole structure includes a midsole that forms a protrusion on the interior of the footwear. The protrusion mates with the recess to provide support for the heel region. The foot-supporting member may also incorporate pronation control characteristics, including a downward cant from a medial to a lateral side of the foot-supporting member and a region of reduced support generally underlying the first metatarsal. To further reduce the rate of pronation, the sole structure includes a region in the rear-lateral corner that is more compressible than other areas of the sole structure.

Abstract: An article of footwear is disclosed having an upper, a foot-supporting member, and a sole structure. The foot-supporting member includes a heel region located at a greater elevation than a forefoot region, thereby defining a recess under the heel region. The sole structure includes a midsole that forms a protrusion on the interior of the footwear. The protrusion mates with the recess to provide support for the heel region. The foot-supporting member may also incorporate pronation control characteristics, including a downward cant from a medial to a lateral side of the foot-supporting member and a region of reduced support generally underlying the first metatarsal. To further reduce the rate of pronation, the sole structure includes a region in the rear-lateral corner that is more compressible than other areas of the sole structure.

Abstract: An article of footwear is disclosed having an upper, a foot-supporting member, and a sole structure. The foot-supporting member includes a heel region located at a greater elevation than a forefoot region, thereby defining a recess under the heel region. The sole structure includes a midsole that forms a protrusion on the interior of the footwear. The protrusion mates with the recess to provide support for the heel region. The foot-supporting member may also incorporate pronation control characteristics, including a downward cant from a medial to a lateral side of the foot-supporting member and a region of reduced support generally underlying the first metatarsal. To further reduce the rate of pronation, the sole structure includes a region in the rear-lateral corner that is more compressible than other areas of the sole structure.