Abstract: Adjustment and tensioning of a drag slat chain system is necessary in order to best handle loads while keeping the drag moving and minimizing chances of the chain jumping the sprocket. An automated means of such adjustment is accomplished by providing a known force to tension the chain to a known “slack” and then automatically setting a mechanical stop to maintain an “ideal” tension range.

Abstract: A method of detecting flow in a tubular includes disposing an identifier within a component, the component including a seat configured to receive a plug member thereon, the identifier disposed separately from the seat; arranging the component within the tubular to position the identifier at a selected location within the tubular; flowing fluid through the tubular and subsequently through the component within the tubular and past the identifier within the component; releasing at least trace amounts of the identifier into the fluid when the fluid flows past the identifier; and detecting the at least trace amounts of the identifier in the fluid at a location uphole of the component.

Abstract: An auto-focus head-mounted display (HMD) dynamically generates aberration-adjusted images based on measured accommodation of user's eye(s). An aberration-adjusted image is an image distorted to correct aberrations that would otherwise occur at a retina of the user due to image light passing through optics of the HMD. The aberration-adjusted image corrects the aberrations of the HMD and “accounts” for the aberrations of the eye so that the resulting retinal image is free of optical aberrations due to the HMD but preserves correct eye optical aberrations that are correlated with a current accommodative state of the eye.

Abstract: Adjustment and tensioning of a drag slat chain system is necessary in order to best handle loads while keeping the drag moving and minimizing chances of the chain jumping the sprocket. An automated means of such adjustment is accomplished by providing a known force to tension the chain to a known “slack” and then automatically setting a mechanical stop to maintain an “ideal” tension range.

Abstract: Example embodiments disclose an apparatus for inspecting welds in a nuclear reactor. The apparatus may include a body, a rotatable pad on the body, a pair of opposing horizontal pads for moving the device in a vertical direction, a pair of opposing vertical pads for moving the device in a horizontal direction, and an inspection device.

Abstract: A virtual reality headset displays a three-dimensional (3D) virtual scene and includes a varifocal element to dynamically adjust a focal length of an optics block included in the virtual reality headset based on a location in the virtual scene where the user is looking. The headset tracks a user's eyes to approximate gaze lines and determines a plane of focus for a frame of the virtual scene as the intersection of the gaze lines. The varifocal element adjusts the focal length of the optics block so the optics block is focused at the plane of focus, which keeps the user's eyes in a zone of comfort as vergence and accommodation change. Based on the plane of focus, the virtual reality headset may provide depth cues, such as depth of field blur, to planes in the virtual scene deeper in the user's field of view than the plane of focus.

Abstract: A virtual reality headset displays a three-dimensional (3D) virtual scene and includes a varifocal element to dynamically adjust a focal length of an optics block included in the virtual reality headset based on a location in the virtual scene where the user is looking. The headset tracks a user's eyes to approximate gaze lines and determines a plane of focus for a frame of the virtual scene as the intersection of the gaze lines. The varifocal element adjusts the focal length of the optics block so the optics block is focused at the plane of focus, which keeps the user's eyes in a zone of comfort as vergence and accommodation change. Based on the plane of focus, the virtual reality headset may provide depth cues, such as depth of field blur, to planes in the virtual scene deeper in the user's field of view than the plane of focus.

Abstract: Adjustment and tensioning of a drag slat chain system is necessary in order to best handle loads while keeping the drag moving and minimizing chances of the chain jumping the sprocket. An automated means of such adjustment is accomplished by providing a known force to tension the chain to a Known “slack” and then automatically setting a mechanical stop to maintain an “ideal” tension range.

Abstract: Adjustment and tensioning of a drag slat chain system is necessary in order to best handle loads while keeping the drag moving and minimizing chances of the chain jumping the sprocket. An automated means of such adjustment is accomplished by providing a known force to tension the chain to a Known “slack” and then automatically setting a mechanical stop to maintain an “ideal” tension range.

Abstract: A head-mounted display (HMD) device includes a plurality of deformation sensors attached to a liner formed around a periphery of a HIVID, adopted for direct or indirect contact a user's face. The deformation sensors measure deformations of the liner caused by movement of an upper portion of a user's face when the user is wearing the HIVID. The deformation sensors are strain gauges embedded in or otherwise coupled to the liner of the HIVID. The sensors translate muscle movements of the upper face of the user to changes in the bending strain and radius of curvature on the surface of the strain gauges. The HIVID includes a module that reconstructs and projects a facial animation model of the user based on signals from the deformation sensors while the HIVID is in use by the user.

Abstract: A downhole assembly includes an isolation tool disposable downhole of a perforation gun. The isolation tool includes a tubular body having a seat, and an occluding device supported on the tubular body in an unseated position, and movable to a seated position on the seat in response to at least one of a firing operation of the perforation gun and a selected fluid velocity through the isolation tool. Fluid communication through the isolation tool is allowed in uphole and downhole directions in the unseated position of the occluding device, and blocked in the downhole direction in the seated position of the occluding device.

Abstract: A fluid flow location identification positioning system includes, at least one component that is attachable within a tubular at any user selectable location within the tubular, and an identifier in operable communication with the at least one component configured to be eroded by fluid that flows therepast, at least trace amounts of the identifier are releasable into fluid that erodes the identifier

Abstract: A fluid flow location identification system includes, a tubular having at least a first opening and a second opening therethrough, wherein the first component is degraded at least by fluid flowing from an outside of the tubular to an inside of the tubular through the first opening and the second component is degraded at least by fluid flowing from an outside of the tubular to the inside of the tubular through the second opening. Trace amounts of a first identifier are releasable into fluid degrading the first component, trace amounts of a second identifier are releasable into fluid degrading the second component. The trace amounts of the first identifier and the trace amounts of the second identifier are detectable in fluid after having comingled to allow determination of whether each of the first opening and the second opening have fluid flowing therethrough.

Abstract: Elastomer composites are prepared by wetting particles of a natural or synthetic rubber with a liquid one-component moisture-curable resin composition and then exposing the wetted particles to moisture to cure the resin composition. The moisture-curable resin composition comprises (a) an isocyanate-terminated polyurethane prepolymer having an isocyanate content of from 0.5 to 12% by weight and (b) from 1 to 30%, based on the combined weight of components (a) and (b), of an epoxide or lactone compound having a molecular weight of from about 70 to about 1000 and which is miscible in the prepolymer at the relative proportions thereof that are present. In addition, the composition contains no more than 0.1% by weight of compounds having a primary or secondary amino group.

Abstract: Elastomer composites are prepared by wetting particles of a natural or synthetic rubber with a liquid one-component moisture-curable resin composition and then exposing the wetted particles to moisture to cure the resin composition. The moisture-curable resin composition comprises (a) an isocyanate-terminated polyurethane prepolymer having an isocyanate content of from 0.5 to 12% by weight and (b) from 1 to 30%, based on the combined weight of components (a) and (b), of an epoxide or lactone compound having a molecular weight of from about 70 to about 1000 and which is miscible in the prepolymer at the relative proportions thereof that are present. In addition, the composition contains no more than 0.1% by weight of compounds having a primary or secondary amino group.

Abstract: A fishing cart for carrying a plurality of fishing rods, and tackle gear from a first site to a fishing site, said fishing cart includes a tubular frame for carrying gear and supplies and tubular sleeves on the outside of the frame for carrying fishing rods. The frame is provided with removable wheels and a releasable towing handle for moving the cart between locations. An auxiliary work table may be supported on the sleeves. The cart may be disassembled for compact storage and vehicle transportation and readily assemble at the fishing site.

Abstract: A fishing cart for carrying a plurality of fishing rods, and tackle gear from a first site to a fishing site, said fishing cart includes a tubular frame for carrying gear and supplies and tubular sleeves on the outside of the frame for carrying fishing rods. The frame is provided with removable wheels and a releasable towing handle for moving the cart between locations. An auxiliary work table may be supported on the sleeves. The cart may be disassembled for compact storage and vehicle transportation and readily assemble at the fishing site.

Abstract: A resilient, deformable sewage back flow stop plug is disclosed that may be comformably compressed within a junction between a structure sewage effluent line and a sewer main. The plug is sized such that, when compressed, it deforms and conformably seals all access conduits to the structure sewage effluent line/sewer main junction. The plug may be deformed around any debris and/or sewage deposits located within the junction, conforming to fill and seal all access conduits and preventing the back flow of sewage into the structure.

Abstract: A swivel coupling for connecting misaligned pipe sections, the swivel coupling having a socket member with an integral flange, a ball member which mates with the socket member and a ball swivel flange which holds the ball member in contact with the socket member. The ball member has a spherical outer surface which is complementary to a spherical inner surface of the socket member and allows the ball member to swivel while remaining in mating contact with the socket member. The ball swivel flange has an inner spherical surface which includes an equatorial band wide enough to capture the spherical surface of the ball member within the ball swivel flange. A sealing ring is positioned between the ball member and socket member to ensure a proper seal. The flange of the socket member is bolted to the ball swivel flange to hold the swivel coupling assembly together and to draw the ball member and socket member into sealing contact.

Abstract: A semiconductor device, such as a transistor, integrated circuit or the like, having a pattern of oxidized and densified porous silicon regions extending onto one of its major surfaces for isolating regions of the semiconductor is manufacturable by a relatively simple process. The process involves forming porous silicon regions in the surface of the semiconductor body such as a silicon wafer, in the areas where dielectric isolation between semiconductor devices is desired. The porous silicon regions are then oxidized at a temperature sufficient to completely oxidize the porous silicon. The oxidiation is such that the oxidized porous silicon extends above the surface of the semiconductor wafer. The oxidized porous silicon regions are then subjected to a temperature higher than the oxidizing temperature utilized in the previous step to cause the densification of the oxidized porous silicon regions.