Abstract: A composition comprising an ethylene vinyl alcohol copolymer and a dimethyl acetamide solvent is provided for forming a coating on prostheses such as stents. The composition can include an active agent or therapeutic substance. Methods are also provided for coating the stents.

Abstract: A computerized positioning and cutting apparatus and method for automatically cutting structures to predetermined lengths with a minimum amount of scrap for a given project. The apparatus includes a frame and a positioning trough supported by the frame. A magazine is mounted to the frame, which is sized to receive uncut lengths of structure to be selectively fed to the positioning trough. A drive system is mounted to the frame and connected to a positioning system for positioning the uncut structures in the trough. A cutter is mounted on the frame to cut the structures as the positioning system feeds the structures through the trough. A controller having an associated computer system is in electrical communication with the drive system and the cutter. The computer system calculates the optimum number of cuts per a predetermined uncut length of structure to produce a minimum amount of waste structure for the project.

Abstract: A hybrid stent is formed which exhibits both high flexibility and high radial strength. The expandable hybrid stent for implantation in a body lumen, such as a coronary artery, consists of radially expandable cylindrical rings generally aligned on a common longitudinal axis and interconnected by one or more links. In one embodiment, a dip-coated covered stent is formed by encapsulating cylindrical rings within a polymer material. In other embodiments, at least some of the rings and links are formed of a polymer material which provides longitudinal and flexural flexibility to the stent. These polymer rings and links are alternated with metallic rings and links in various configurations to attain sufficient column strength along with the requisite flexibility in holding open the target site within the body lumen. Alternatively, a laminated, linkless hybrid stent is formed by encapsulating cylindrical rings within a polymer tube.

Abstract: A method for monitoring performance of a gas turbine system comprises providing a plurality of combustor cans; placing a plurality of temperature sensors circumferentially around an exhaust plane of the plurality of combustor cans; operating the plurality of combustor cans while varying a plurality of gas turbine operating parameters, where exhaust gas issues from each combustor can of the plurality of combustor cans during operation; measuring temperature of the exhaust gas in the exhaust plane using the plurality of temperature sensors to obtain a plurality of individual temperature measurements; determining a correlation of the individual temperature measurements of exhaust gas temperature with corresponding individual combustor cans of the plurality of combustor cans issuing the exhaust gas; and developing a swirl model, where the model uses the correlation to predict swirl values in the exhaust plane as a function of the operating parameters.

Abstract: An ethylene vinyl alcohol coating for an implantable device or prosthesis, such as a stent, is provided. Compositions are also provided for coating the implantable device. The compositions can include an ethylene vinyl alcohol copolymer added to an iso-propyl alcohol (IPA)/water solvent. Active agents, such as actinomycin D, can be included in the composition to be carried by the copolymer matrix.

Abstract: A method and system of designing the operations and controls of a gas turbine, includes generating an operations model for the gas turbine including at least one objective function and defining operations and control constraints for the operations model of the gas turbine. An online dynamic optimizer/controller dynamically optimizes and controls operation of the gas turbine using model based control based on the operations model and the operations and control constraints. The model based control may include model predictive control.

Abstract: An ethylene vinyl alcohol coating for an implantable device or prosthesis, such as a stent, is provided. Compositions are also provided for coating the implantable device. The compositions can include an ethylene vinyl alcohol copolymer added to an iso-propyl alcohol (IPA)/water solvent. Active agents, such as actinomycin D, can be included in the composition to be carried by the copolymer matrix.

Abstract: The invention relates to an improved system for connecting the ends of sheet metal ducts wherein each duct end is provided with an integral frame. Corner connectors defining perpendicularly extending arms are associated with each frame, and bolts or other fasteners are utilized for connecting the connectors and integral frames. The sections include an upturned portion extending perpendicularly outwardly from the duct wall, a second portion bent rearwardly from the outer end of the first portion, a third portion extending from the outer end of the second portion and forming an L-shaped double wall portion. When the frame is formed in this fashion, it is adapted to receive the side edges of respected arms of corner connectors whereby the ducts may be efficiently assembled by locating corner connectors in place and thereafter applying the fasteners used for maintaining the assembly.

Abstract: A medical device, and particularly an intracorporeal device for therapeutic or diagnostic use, comprising a silicone polyurethane. One embodiment of the invention is a medical device having a body formed of melt process extruded, porous silicone polyurethane material. In a method of the invention, the silicone polyurethane is combined with a porogen and then melt process extruded into a desired shape such as a tubular body. The porogen is then extracted from the extrudate, to form the extruded, melt processed, porous silicone polyurethane tubular body. The medical device, such as a stent cover, vascular graft, or catheter balloon, formed of the silicone polyurethane has excellent biostability, strength, and flexibility.

Abstract: An integral metal spacer for insulated glass units and method of fabricating the spacer. The spacer defines a substantially closed cross-section contour having a bottom surface, a pair of sidewalls, and a pair of generally abutting inner surfaces. A gap may be defined between the adjacent inner surfaces. The three interior corners are defined by fully mitered sidewalls. A pair of bridges are provided to integrally interconnect the inner surfaces of adjacent spacer segments. The method of fabricating includes taking a roll of flat metal stock and completely punching all corner and other structures therein while the stock is planar; severing the punched stock into individual spacer members; roll-forming the individual members into a finished linear spacer piece; applying desiccant during roll-forming; applying sealant; thereafter folding the elongate member into a square spacer thereby locking the desiccant therein.

Abstract: An integral metal spacer for insulated glass units and method of fabricating the spacer. The spacer defines a substantially closed cross-section contour having a bottom surface, a pair of sidewalls, and a pair of generally abutting inner surfaces. A gap may be defined between the adjacent inner surfaces. The three interior corners are defined by fully mitered sidewalls. A pair of bridges are provided to integrally interconnect the inner surfaces of adjacent spacer segments. The method of fabricating includes taking a roll of flat metal stock and completely punching all corner and other structures therein while the stock is planar; severing the punched stock into individual spacer members; roll-forming the individual members into a finished linear spacer piece; applying desiccant during roll-forming; applying sealant; thereafter folding the elongate member into a square spacer thereby locking the desiccant therein.

Abstract: A roll forming apparatus is provided having a plurality of roll forming stations arranged in an advancing path and having at least one roll forming station including adjustable top and bottom rolls. The adjustable forming rolls include separate inner and outer sections. The inner roll sections are adjustable transverse to the advancing path in order to shift the position of bend introduction to a workpiece. In a preferred embodiment, each inner roll section cooperates with a backing collar which has preset stops of different heights to quickly and precisely adjust the apparatus to predetermined settings. The apparatus is particularly useful for forming flanges on duct sections where duct sections having different flange heights are desired. The at least one adjustable roll forming station can be used to retrofit existing non-adjustable roll forming apparatus.

Abstract: An ethylene vinyl alcohol coating for an implantable device or prosthesis, such as a stent, is provided. Compositions are also provided for coating the implantable device. The compositions can include an ethylene vinyl alcohol copolymer added to an iso-propyl alcohol (IPA)/water solvent. Active agents, such as actinomycin D, can be included in the composition to be carried by the copolymer matrix.

Abstract: An integral metal spacer for insulated glass units and method of fabricating the spacer. The spacer defines a substantially closed cross-section contour having a bottom surface, a pair of sidewalls, and a pair of generally abutting inner surfaces. A gap may be defined between the adjacent inner surfaces. The three interior corners are defined by fully mitered sidewalls. A pair of bridges are provided to integrally interconnect the inner surfaces of adjacent spacer segments. The method of fabricating includes taking a roll of flat metal stock and completely punching all corner and other structures therein while the stock is planar; severing the punched stock into individual spacer members; roll-forming the individual members into a finished linear spacer piece; applying desiccant during roll-forming; applying sealant; thereafter folding the elongate member into a square spacer thereby locking the desiccant therein.

Abstract: An integral metal spacer for insulated glass units and method of fabricating the spacer. The spacer defines a substantially closed cross-section contour having a bottom surface, a pair of sidewalls, and a pair of generally abutting inner surfaces. A gap may be defined between the adjacent inner surfaces. The three interior corners are defined by fully mitered sidewalls. A pair of bridges are provided to integrally interconnect the inner surfaces of adjacent spacer segments. The method of fabricating includes taking a roll of flat metal stock and completely punching all corner and other structures therein while the stock is planar; severing the punched stock into individual spacer members; roll-forming the individual members into a finished linear spacer piece; applying desiccant, preferably a desiccant rope material during roll-forming; applying sealant; thereafter folding the elongate member into a square spacer thereby locking the desiccant therein.