Abstract: A monitoring system and method for monitoring signals from an implantable medical device are disclosed. The monitoring system and method include a monitor configured to detect a radio frequency artifact from the signals of the implantable medical device and circuitry for processing the radio frequency artifact from the signals of the implantable medical device.

Abstract: High spatial frequency optical noise in the form of intensity contrasting picture elements in the display of a projected light image on a bead-oriented image-enhancing filter is significantly reduced by interposing light-scattering material in the optical path between a source of the projected light image and the display in order to inhibit formation and interference of coherent light waves, and to mask the appearance of separate or discrete beaded apertures.

Abstract: Method and apparatus for collimating light of projected images establishes limited few designs of Fresnel lenses to accommodate conventional image projection system having a wide range of sizes of viewing screens for the projected images. A multi-layer image-enhancing filter is disposed to receive substantially collimated image light exiting the Fresnel lens. A light-transmissive structure includes a substrate layer supporting a single layer of contiguously-arranged beads of light transmissive material disposed on an incident surface of the substrate layer. A Fresnel lens includes angularly-pitched segments on one surface and an array of a plurality of elongated lenses aligned in one direction on an opposite surface of the Fresnel lens for passing a projected light image therethough to the layer of beads on the substrate layer.

Abstract: A method for reconstructing an image of an object includes generating a plurality of projection data, helically interpolating the projection data, rebinning the helically interpolated projection data from a fan-beam format to a parallel-beam format, and reconstructing an image of the object using the parallel-beam format projection data.

Abstract: High spatial frequency optical noise in the form of intensity contrasting picture elements in the display of a projected light image on a bead-oriented image-enhancing filter is significantly reduced by interposing light-scattering material in the optical path between a source of the projected light image and the display in order to inhibit formation and interference of coherent light waves, and to mask the appearance of separate or discrete beaded apertures.

Abstract: Method and apparatus for collimating light of projected images establishes limited few designs of Fresnel lenses to accommodate conventional image projection systems having a wide range of sizes of viewing screens for the projected images. A multi-layer image-enhancing filter is disposed to receive substantially collimated image light exiting the Fresnel lens. A light-transmissive structure includes a substrate layer supporting a single layer of contiguously-arranged beads of light transmissive material disposed on an incident surface of the substrate layer. A Fresnel lens includes angularly-pitched segments on one surface and an array of a plurality of elongated lenses aligned in one direction on an opposite surface of the Fresnel lens for passing a projected light image therethrough to the layer of beads on the substrate layer.

Abstract: Method and apparatus for collimating light of projected images establishes limited few designs of Fresnel lenses to accommodate conventional projection systems having a wide range of sizes of viewing screens for the ted images. A multi-layer image-enhancing filter is disposed to receive Substantially collimated image light exiting the Fresnel lens.

Abstract: Method and apparatus for collimating light of projected images establishes limited few designs of Fresnel lenses to accommodate conventional image projection systems having a wide range of sizes of viewing screens for the projected images. A multi-layer image-enhancing filter is disposed to receive substantially collimated image light exiting the Fresnel lens.

Abstract: A method for reconstructing an image of an object includes generating a plurality of projection data, helically interpolating the projection data, rebinning the helically interpolated projection data from a fan-beam format to a parallel-beam format, and reconstructing an image of the object using the parallel-beam format projection data.

Abstract: A venetian blind slat or coil of venetian blind slat substrate, such as aluminum, is first coated with a conductive primer. An anti-static conductive coated is applied thereover. The resultant coated finished blind slat and its associated spaced horizontal slats have sufficient conductivity to resist airborne dust particle accumulation with reductions in dust accumulation of from 36% to about 82% being attained, as compared to colored paint insulative coating on standard venetian blinds. An inorganic, inert conductive additive such as stannous oxide is employed in the anti-static conductive coating, resulting in coating conductivities of less than 10.sup.6 ohms per square and, in a preferred embodiment, from about 10 ohms per square to 10.sup.5 ohms per square.

Abstract: The invention comprises a method for producing optical thin films with a high laser damage threshold and the resulting thin films. The laser damage threshold of the thin films is permanently increased by irradiating the thin films with a fluence below an unconditioned laser damage threshold.

Abstract: A pair of telescoping members include interconnecting end portions having a preselected configuration that facilitates the insertion of one tubular end portion into the other tubular end portion. The surface configuration of the interconnecting end portions is complementary so that the surfaces on an inner member engage the surfaces on the outer member to permit the transmission of rotation from one telescoping member to the other while permitting relative longitudinal movement therebetween. The inner and outer connecting members are spaced apart to form an annulus therebetween and provide a degree of tolerance greater than the tolerance provided with conventionally machined telescoping connecting end portions. The tolerance is taken up by the injection of a thermosetting resinous material at an elevated temperature into the annulus, completely filling the annulus.

Abstract: A device for lubricating rails is mounted on a track maintenance truck. A pair of heated grease cannisters are mounted in the truck bed along with an air compressor for powering the pneumatic components of the lubricator. A pair of applicator arms have nozzles which apply the grease in a bead to the rails. Valves operated by pneumatic cylinders control the flow of grease to the applicator arms. A special frame attached to the rail gear on the rear bumper of the truck rotatively supports a pair of coaxial shafts on which the arms are carried. Independent pneumatic cylinders rotate the shafts to move the applicator arms between a lowered operating position for applying grease and a raised position in which the arms extend horizontally when not in use. Each arm can be manually moved to and latched in an upright position for over the road travel of the truck.

Abstract: A protective gear assembly includes cantilever-type protective pads to be used by those athletes engaged in contact sports such as football, hockey, etc. The pads are releasably attached to a one piece padded vest type jacket by strap like members which pass through apertures thereon. The vest jacket is designed to receive all the necessary elements in the protective gear assembly such as epaulettes, padded cups, back plates shoulder plates and breast plates.

Abstract: A.C. grounded termination networks having multi-octave bandwidth capacity are provided in printed rf circuit form (e.g., microstrip, stripline) by fabricating a distributed element network as a series of alternating resistor-conductor elements having different circuit parameters. The circuit parameters are computed using an "exhaustive search" procedure involving computer optimization of the chain matrix equivalent expression of the voltage reflection coefficient for the network.

Abstract: A printed broadband rf transmission line circuit is provided with a D.C. bias port in the form of a high impedance printed stub conductor connected between a ground point and the transmission line. Minimum attenuation of a broadband rf signal on the line is achieved by including in the transmission line a plurality of series-connected conductor segments having different line length and impedance values such that the transmission line and stub conductor configuration are tuned to provide a maximum voltage transmission coefficient across the D.C. bias port. The parameters for the series-connected transmission line segments and the stub conductor are selected by performing a computer optimization of the chain matrix equivalent expression of the voltage transmission coefficient for the series-connected transmission line segments together with the stub conductor.

Abstract: A printed rf circuit switchable step attenuator for frequencies in the Gigahertz range employs PIN diodes for switching a pi network in and out of a transmission line. The A.C. grounded terminations of the pi network are constructed through the use of low impedance, open end stubs, eliminating the need for plated over-edge ground connections. D.C. bias potential for controlling the switching diodes is coupled to the rf portion of the circuit by means including high impedance grounded stub conductors connected to the transmission line. To achieve broadband operation the admittance of the stub conductors is tuned out by configuring the transmission line as a series of differing line length and impedance sections which are arranged symmetrically with respect to the point of intersection between the grounded stub conductors and the line.